diff options
author | 2014-05-30 10:18:47 +0000 | |
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committer | 2014-05-30 10:18:47 +0000 | |
commit | ff99c901e9482217fddd445d3ec94be8fdba17a4 (patch) | |
tree | e77ad47db76965de147ba94179db22be44bb1b88 | |
parent | 7dc5e8b5331ef6fff24a823e15a36dda83115954 (diff) |
Updated to latest mongoose code in agreement with author (nw)
-rw-r--r-- | src/emu/webengine.c | 274 | ||||
-rw-r--r-- | src/emu/webengine.h | 10 | ||||
-rw-r--r-- | src/lib/web/mongoose.c | 9604 | ||||
-rw-r--r-- | src/lib/web/mongoose.h | 470 |
4 files changed, 4825 insertions, 5533 deletions
diff --git a/src/emu/webengine.c b/src/emu/webengine.c index c43b5fe54ff..f179653a5e7 100644 --- a/src/emu/webengine.c +++ b/src/emu/webengine.c @@ -20,34 +20,6 @@ // WEB ENGINE //************************************************************************** -void web_engine::websocket_ready_handler(struct mg_connection *conn) { - static const char *message = "update_machine"; - mg_websocket_write(conn, WEBSOCKET_OPCODE_TEXT, message, strlen(message)); - m_websockets.append(*global_alloc(simple_list_wrapper<mg_connection>(conn))); -} - -// Arguments: -// flags: first byte of websocket frame, see websocket RFC, -// http://tools.ietf.org/html/rfc6455, section 5.2 -// data, data_len: payload data. Mask, if any, is already applied. -int web_engine::websocket_data_handler(struct mg_connection *conn, int flags, - char *data, size_t data_len) -{ - // just Echo example for now - if ((flags & 0x0f) == WEBSOCKET_OPCODE_TEXT) - mg_websocket_write(conn, WEBSOCKET_OPCODE_TEXT, data, data_len); - - // Returning zero means stoping websocket conversation. - // Close the conversation if client has sent us "exit" string. - return memcmp(data, "exit", 4); -} - -static void get_qsvar(const struct mg_request_info *request_info, - const char *name, char *dst, size_t dst_len) { - const char *qs = request_info->query_string; - mg_get_var(qs, strlen(qs == NULL ? "" : qs), name, dst, dst_len); -} - char* websanitize_statefilename ( char* unsanitized ) { // It's important that we remove any dangerous characters from any filename @@ -107,7 +79,8 @@ int web_engine::json_game_handler(struct mg_connection *conn) // Returning non-zero tells mongoose that our function has replied to // the client, and mongoose should not send client any more data. - return 1; + + return MG_TRUE; } int web_engine::json_slider_handler(struct mg_connection *conn) @@ -116,7 +89,7 @@ int web_engine::json_slider_handler(struct mg_connection *conn) astring tempstring; Json::Value array(Json::arrayValue); - /* add all sliders */ + // add all sliders for (curslider = machine().ui().get_slider_list(); curslider != NULL; curslider = curslider->next) { INT32 curval = (*curslider->update)(machine(), curslider->arg, &tempstring, SLIDER_NOCHANGE); @@ -130,7 +103,7 @@ int web_engine::json_slider_handler(struct mg_connection *conn) array.append(data); } - /* add all sliders */ + // add all sliders for (curslider = (slider_state*)machine().osd().get_slider_list(); curslider != NULL; curslider = curslider->next) { INT32 curval = (*curslider->update)(machine(), curslider->arg, &tempstring, SLIDER_NOCHANGE); @@ -154,28 +127,27 @@ int web_engine::json_slider_handler(struct mg_connection *conn) "%s", (int)strlen(json), json); - return 1; + return MG_TRUE; } // This function will be called by mongoose on every new request. int web_engine::begin_request_handler(struct mg_connection *conn) { - const struct mg_request_info *request_info = mg_get_request_info(conn); - if (!strncmp(request_info->uri, "/json/",6)) + if (!strncmp(conn->uri, "/json/",6)) { - if (!strcmp(request_info->uri, "/json/game")) + if (!strcmp(conn->uri, "/json/game")) { return json_game_handler(conn); } - if (!strcmp(request_info->uri, "/json/slider")) + if (!strcmp(conn->uri, "/json/slider")) { return json_slider_handler(conn); } } - else if (!strncmp(request_info->uri, "/cmd",4)) + else if (!strncmp(conn->uri, "/cmd",4)) { char cmd_name[64]; - get_qsvar(request_info, "name", cmd_name, sizeof(cmd_name)); + mg_get_var(conn, "name", cmd_name, sizeof(cmd_name)); if(!strcmp(cmd_name,"softreset")) { @@ -199,14 +171,14 @@ int web_engine::begin_request_handler(struct mg_connection *conn) else if(!strcmp(cmd_name,"savestate")) { char cmd_val[64]; - get_qsvar(request_info, "val", cmd_val, sizeof(cmd_val)); + mg_get_var(conn, "val", cmd_val, sizeof(cmd_val)); char *filename = websanitize_statefilename(cmd_val); m_machine->schedule_save(filename); } else if(!strcmp(cmd_name,"loadstate")) { char cmd_val[64]; - get_qsvar(request_info, "val", cmd_val, sizeof(cmd_val)); + mg_get_var(conn, "val", cmd_val, sizeof(cmd_val)); char *filename = cmd_val; m_machine->schedule_load(filename); } @@ -226,14 +198,14 @@ int web_engine::begin_request_handler(struct mg_connection *conn) // Returning non-zero tells mongoose that our function has replied to // the client, and mongoose should not send client any more data. - return 1; + return MG_TRUE; } - else if (!strncmp(request_info->uri, "/slider",7)) + else if (!strncmp(conn->uri, "/slider",7)) { char cmd_id[64]; char cmd_val[64]; - get_qsvar(request_info, "id", cmd_id, sizeof(cmd_id)); - get_qsvar(request_info, "val", cmd_val, sizeof(cmd_val)); + mg_get_var(conn, "id", cmd_id, sizeof(cmd_id)); + mg_get_var(conn, "val", cmd_val, sizeof(cmd_val)); int cnt = 0; int id = atoi(cmd_id); const slider_state *curslider; @@ -260,104 +232,105 @@ int web_engine::begin_request_handler(struct mg_connection *conn) // Returning non-zero tells mongoose that our function has replied to // the client, and mongoose should not send client any more data. - return 1; + return MG_TRUE; } - else if (!strncmp(request_info->uri, "/screenshot.png",15)) + else if (!strncmp(conn->uri, "/screenshot.png",15)) { - screen_device_iterator iter(m_machine->root_device()); - screen_device *screen = iter.first(); - - if (screen == NULL) + FILE *fp = (FILE *) conn->connection_param; + char buf[200]; + size_t n = 0; + if (fp == NULL) { - return 0; - } - - astring fname("screenshot.png"); - emu_file file(m_machine->options().snapshot_directory(), OPEN_FLAG_WRITE | OPEN_FLAG_CREATE | OPEN_FLAG_CREATE_PATHS); - file_error filerr = file.open(fname); + screen_device_iterator iter(m_machine->root_device()); + screen_device *screen = iter.first(); - if (filerr != FILERR_NONE) - { - return 0; - } + if (screen == NULL) + { + return 0; + } - m_machine->video().save_snapshot(screen, file); - astring fullpath(file.fullpath()); - file.close(); + astring fname("screenshot.png"); + { + emu_file file(m_machine->options().snapshot_directory(), OPEN_FLAG_WRITE | OPEN_FLAG_CREATE | OPEN_FLAG_CREATE_PATHS); + file_error filerr = file.open(fname); - mg_send_file(conn,fullpath); - return 1; - } - return 0; -} + if (filerr != FILERR_NONE) + { + return 0; + } -void *web_engine::websocket_keepalive() -{ - while(!m_exiting_core) - { - osd_ticks_t curtime = osd_ticks(); - if ((curtime - m_lastupdatetime) > osd_ticks_per_second() * 5) - { - m_lastupdatetime = curtime; - for (simple_list_wrapper<mg_connection> *curitem = m_websockets.first(); curitem != NULL; curitem = curitem->next()) + m_machine->video().save_snapshot(screen, file); + astring fullpath(file.fullpath()); + file.close(); + } + { - int status = mg_websocket_write(curitem->object(), WEBSOCKET_OPCODE_PING, NULL, 0); - if (status==0) m_websockets.detach(*curitem); // remove inactive clients + emu_file file(m_machine->options().snapshot_directory(), OPEN_FLAG_READ); + file_error filerr = file.open(fname); + + if (filerr != FILERR_NONE) + { + return 0; + } + + file.seek(0, SEEK_SET); + mg_send_header(conn, "Content-Type", "image/png"); + mg_send_header(conn, "Cache-Control", "no-cache, no-store, must-revalidate"); + mg_send_header(conn, "Pragma", "no-cache"); + mg_send_header(conn, "Expires", "0"); + do + { + n = file.read(buf, sizeof(buf)); + mg_send_data(conn, buf, n); + } + while (n==sizeof(buf)); + file.close(); } } - osd_sleep(osd_ticks_per_second()/5); + return MG_TRUE; } - return NULL; -} - -//------------------------------------------------- -// static callbacks -//------------------------------------------------- -static void websocket_ready_handler_static(struct mg_connection *conn) -{ - const struct mg_request_info *request_info = mg_get_request_info(conn); - web_engine *engine = static_cast<web_engine *>(request_info->user_data); - engine->websocket_ready_handler(conn); + return 0; } -static int websocket_data_handler_static(struct mg_connection *conn, int flags, - char *data, size_t data_len) -{ - const struct mg_request_info *request_info = mg_get_request_info(conn); - web_engine *engine = static_cast<web_engine *>(request_info->user_data); - return engine->websocket_data_handler(conn, flags, data, data_len); +static int ev_handler(struct mg_connection *conn, enum mg_event ev) { + if (ev == MG_REQUEST) { + if (conn->is_websocket) { + // This handler is called for each incoming websocket frame, one or more + // times for connection lifetime. + // Echo websocket data back to the client. + //const char *msg = "update_machine"; + //mg_websocket_write(conn, 1, msg, strlen(msg)); + return conn->content_len == 4 && !memcmp(conn->content, "exit", 4) ? MG_FALSE : MG_TRUE; + } else { + web_engine *engine = static_cast<web_engine *>(conn->server_param); + return engine->begin_request_handler(conn); + } + } else if (ev == MG_AUTH) { + return MG_TRUE; + } else { + return MG_FALSE; + } } -static int begin_request_handler_static(struct mg_connection *conn) -{ - const struct mg_request_info *request_info = mg_get_request_info(conn); - web_engine *engine = static_cast<web_engine *>(request_info->user_data); - return engine->begin_request_handler(conn); +static int iterate_callback(struct mg_connection *c, enum mg_event ev) { + if (ev == MG_POLL && c->is_websocket) { + char buf[20]; + int len = snprintf(buf, sizeof(buf), "%lu", + (unsigned long) * (time_t *) c->callback_param); + mg_websocket_write(c, 1, buf, len); + } + return MG_TRUE; } -static int begin_http_error_handler_static(struct mg_connection *conn, int status) -{ - //const struct mg_request_info *request_info = mg_get_request_info(conn); - if (status == 404) // 404 -- File Not Found - { - { - mg_printf(conn, - "HTTP/1.1 404 Not Found\r\n" - "Content-Type: text/plain\r\n" - "Content-Length: 14\r\n" // Always set Content-Length - "\r\n" - "Nothing to do."); - } - } - // Returning non-zero tells mongoose that our function has replied to - // the client, and mongoose should not send client any more data. - return 1; -} - -static void *websocket_keepalive_static(void *thread_func_param) -{ - web_engine *engine = static_cast<web_engine *>(thread_func_param); - return engine->websocket_keepalive(); +static void *serve(void *server) { + time_t current_timer = 0, last_timer = time(NULL); + for (;;) mg_poll_server((struct mg_server *) server, 1000); + current_timer = time(NULL); + if (current_timer - last_timer > 0) { + last_timer = current_timer; + mg_iterate_over_connections((struct mg_server *)server, iterate_callback, ¤t_timer); + } + return NULL; } //------------------------------------------------- @@ -367,32 +340,18 @@ static void *websocket_keepalive_static(void *thread_func_param) web_engine::web_engine(emu_options &options) : m_options(options), m_machine(NULL), - m_ctx(NULL), + m_server(NULL), m_lastupdatetime(0), m_exiting_core(false) { - struct mg_callbacks callbacks; - - // List of options. Last element must be NULL. - const char *web_options[] = { - "listening_ports", options.http_port(), - "document_root", options.http_path(), - NULL - }; - - // Prepare callbacks structure. - memset(&callbacks, 0, sizeof(callbacks)); - callbacks.begin_request = begin_request_handler_static; - callbacks.websocket_ready = websocket_ready_handler_static; - callbacks.websocket_data = websocket_data_handler_static; - callbacks.http_error = begin_http_error_handler_static; - - // Start the web server. if (m_options.http()) { - m_ctx = mg_start(&callbacks, this, web_options); - - mg_start_thread(websocket_keepalive_static, this); + m_server = mg_create_server(this, ev_handler); + + mg_set_option(m_server, "listening_port", options.http_port()); + mg_set_option(m_server, "document_root", options.http_path()); + + mg_start_thread(serve, m_server); } } @@ -414,21 +373,20 @@ web_engine::~web_engine() void web_engine::close() { m_exiting_core = 1; - osd_sleep(osd_ticks_per_second()/5); - for (simple_list_wrapper<mg_connection> *curitem = m_websockets.first(); curitem != NULL; curitem = curitem->next()) - { - mg_websocket_write(curitem->object(), WEBSOCKET_OPCODE_CONNECTION_CLOSE, NULL, 0); - } - // Stop the server. - mg_stop(m_ctx); + // Cleanup, and free server instance + mg_destroy_server(&m_server); } +static int websocket_callback(struct mg_connection *c, enum mg_event ev) { + if (c->is_websocket) { + const char *message = (const char *)c->callback_param; + mg_websocket_write(c, 1, message, strlen(message)); + } + return MG_TRUE; +} void web_engine::push_message(const char *message) { - for (simple_list_wrapper<mg_connection> *curitem = m_websockets.first(); curitem != NULL; curitem = curitem->next()) - { - int status = mg_websocket_write(curitem->object(), WEBSOCKET_OPCODE_TEXT, message, strlen(message)); - if (status==0) m_websockets.remove(*curitem); // remove inactive clients - } + if (m_server!=NULL) + mg_iterate_over_connections(m_server, websocket_callback, (void*)message); } diff --git a/src/emu/webengine.h b/src/emu/webengine.h index a30826eb92d..85b5efa8342 100644 --- a/src/emu/webengine.h +++ b/src/emu/webengine.h @@ -13,7 +13,7 @@ #ifndef __WEB_ENGINE_H__ #define __WEB_ENGINE_H__ -struct mg_context; // Handle for the HTTP service itself +struct mg_server; // Handle for the HTTP server itself struct mg_connection; // Handle for the individual connection class web_engine @@ -27,12 +27,7 @@ public: void close(); void set_machine(running_machine &machine) { m_machine = &machine; } - - void websocket_ready_handler(struct mg_connection *conn); - int websocket_data_handler(struct mg_connection *conn, int flags, char *data, size_t data_len); int begin_request_handler(struct mg_connection *conn); - int begin_http_error_handler(struct mg_connection *conn, int status); - void *websocket_keepalive(); protected: // getters running_machine &machine() const { return *m_machine; } @@ -43,10 +38,9 @@ private: // internal state emu_options & m_options; running_machine * m_machine; - struct mg_context * m_ctx; + struct mg_server * m_server; osd_ticks_t m_lastupdatetime; bool m_exiting_core; - simple_list<simple_list_wrapper<mg_connection> > m_websockets; }; #endif /* __web_engine_H__ */ diff --git a/src/lib/web/mongoose.c b/src/lib/web/mongoose.c index 346c37a6d9f..9ff2b54aeec 100644 --- a/src/lib/web/mongoose.c +++ b/src/lib/web/mongoose.c @@ -1,863 +1,1400 @@ -// Copyright (c) 2004-2013 Sergey Lyubka +// Copyright (c) 2004-2013 Sergey Lyubka <valenok@gmail.com> +// Copyright (c) 2013-2014 Cesanta Software Limited +// All rights reserved // -// Permission is hereby granted, free of charge, to any person obtaining a copy -// of this software and associated documentation files (the "Software"), to deal -// in the Software without restriction, including without limitation the rights -// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell -// copies of the Software, and to permit persons to whom the Software is -// furnished to do so, subject to the following conditions: +// This library is dual-licensed: you can redistribute it and/or modify +// it under the terms of the GNU General Public License version 2 as +// published by the Free Software Foundation. For the terms of this +// license, see <http://www.gnu.org/licenses/>. // -// The above copyright notice and this permission notice shall be included in -// all copies or substantial portions of the Software. +// You are free to use this library under the terms of the GNU General +// Public License, but WITHOUT ANY WARRANTY; without even the implied +// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. +// See the GNU General Public License for more details. // -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN -// THE SOFTWARE. +// Alternatively, you can license this library under a commercial +// license, as set out in <http://cesanta.com/>. -#define NO_SSL -#define USE_WEBSOCKET - -#if defined(_WIN32) -#define SETSOCKOPT_CAST const char * -#else -#define SETSOCKOPT_CAST void * -#endif - -#if defined(_WIN32) -#if !defined(_CRT_SECURE_NO_WARNINGS) -#define _CRT_SECURE_NO_WARNINGS // Disable deprecation warning in VS2005 -#endif +#ifdef NOEMBED_NET_SKELETON +#include "net_skeleton.h" #else -#ifdef __linux__ -#define _XOPEN_SOURCE 600 // For flockfile() on Linux -#endif -#define _LARGEFILE_SOURCE // Enable 64-bit file offsets -#define __STDC_FORMAT_MACROS // <inttypes.h> wants this for C++ -#define __STDC_LIMIT_MACROS // C++ wants that for INT64_MAX -#endif - -#if defined (_MSC_VER) -// conditional expression is constant: introduced by FD_SET(..) -#pragma warning (disable : 4127) -// non-constant aggregate initializer: issued due to missing C99 support -#pragma warning (disable : 4204) -#endif +// net_skeleton start +// Copyright (c) 2014 Cesanta Software Limited +// All rights reserved +// +// This software is dual-licensed: you can redistribute it and/or modify +// it under the terms of the GNU General Public License version 2 as +// published by the Free Software Foundation. For the terms of this +// license, see <http://www.gnu.org/licenses/>. +// +// You are free to use this software under the terms of the GNU General +// Public License, but WITHOUT ANY WARRANTY; without even the implied +// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. +// See the GNU General Public License for more details. +// +// Alternatively, you can license this software under a commercial +// license, as set out in <http://cesanta.com/>. + +#ifndef NS_SKELETON_HEADER_INCLUDED +#define NS_SKELETON_HEADER_INCLUDED + +#define NS_SKELETON_VERSION "1.1" + +#undef UNICODE // Use ANSI WinAPI functions +#undef _UNICODE // Use multibyte encoding on Windows +#define _MBCS // Use multibyte encoding on Windows +#define _INTEGRAL_MAX_BITS 64 // Enable _stati64() on Windows +#define _CRT_SECURE_NO_WARNINGS // Disable deprecation warning in VS2005+ +#undef WIN32_LEAN_AND_MEAN // Let windows.h always include winsock2.h +#define _XOPEN_SOURCE 600 // For flockfile() on Linux +#define __STDC_FORMAT_MACROS // <inttypes.h> wants this for C++ +#define __STDC_LIMIT_MACROS // C++ wants that for INT64_MAX +#define _LARGEFILE_SOURCE // Enable fseeko() and ftello() functions +#define _FILE_OFFSET_BITS 64 // Enable 64-bit file offsets -// Disable WIN32_LEAN_AND_MEAN. -// This makes windows.h always include winsock2.h -#ifdef WIN32_LEAN_AND_MEAN -#undef WIN32_LEAN_AND_MEAN +#ifdef _MSC_VER +#pragma warning (disable : 4127) // FD_SET() emits warning, disable it +#pragma warning (disable : 4204) // missing c99 support #endif -#if defined(__SYMBIAN32__) -#define NO_SSL // SSL is not supported -#define NO_CGI // CGI is not supported -#define PATH_MAX FILENAME_MAX -#endif // __SYMBIAN32__ - -#ifndef _WIN32_WCE // Some ANSI #includes are not available on Windows CE #include <sys/types.h> #include <sys/stat.h> +#include <assert.h> #include <errno.h> -#include <signal.h> #include <fcntl.h> -#endif // !_WIN32_WCE - -#include <time.h> -#include <stdlib.h> #include <stdarg.h> -#include <assert.h> -#include <string.h> -#include <ctype.h> -#include <limits.h> #include <stddef.h> #include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <time.h> +#include <signal.h> -#if defined(_WIN32) && !defined(__SYMBIAN32__) // Windows specific -#undef _WIN32_WINNT -#define _WIN32_WINNT 0x0400 // To make it link in VS2005 -#include <windows.h> - -#ifndef PATH_MAX -#define PATH_MAX MAX_PATH +#ifdef _WIN32 +#ifdef _MSC_VER +#pragma comment(lib, "ws2_32.lib") // Linking with winsock library #endif - -#ifndef _WIN32_WCE +#include <windows.h> #include <process.h> -#include <direct.h> -#include <io.h> -#else // _WIN32_WCE -#define NO_CGI // WinCE has no pipes - -typedef long off_t; - -#define errno GetLastError() -#define strerror(x) _ultoa(x, (char *) _alloca(sizeof(x) *3 ), 10) -#endif // _WIN32_WCE - -#define MAKEUQUAD(lo, hi) ((uint64_t)(((uint32_t)(lo)) | \ - ((uint64_t)((uint32_t)(hi))) << 32)) -#define RATE_DIFF 10000000 // 100 nsecs -#define EPOCH_DIFF MAKEUQUAD(0xd53e8000, 0x019db1de) -#define SYS2UNIX_TIME(lo, hi) \ - (time_t) ((MAKEUQUAD((lo), (hi)) - EPOCH_DIFF) / RATE_DIFF) - -// Visual Studio 6 does not know __func__ or __FUNCTION__ -// The rest of MS compilers use __FUNCTION__, not C99 __func__ -// Also use _strtoui64 on modern M$ compilers -#if defined(_MSC_VER) && _MSC_VER < 1300 +#ifndef EINPROGRESS +#define EINPROGRESS WSAEINPROGRESS +#endif +#ifndef EWOULDBLOCK +#define EWOULDBLOCK WSAEWOULDBLOCK +#endif +#ifndef __func__ #define STRX(x) #x #define STR(x) STRX(x) #define __func__ __FILE__ ":" STR(__LINE__) -#define strtoull(x, y, z) (unsigned __int64) _atoi64(x) -#define strtoll(x, y, z) _atoi64(x) -#else -#define __func__ __FUNCTION__ -#define strtoull(x, y, z) _strtoui64(x, y, z) -#define strtoll(x, y, z) _strtoi64(x, y, z) -#endif // _MSC_VER - -#define ERRNO GetLastError() -#define NO_SOCKLEN_T -#define SSL_LIB "ssleay32.dll" -#define CRYPTO_LIB "libeay32.dll" -#define O_NONBLOCK 0 -#if !defined(EWOULDBLOCK) -#define EWOULDBLOCK WSAEWOULDBLOCK -#endif // !EWOULDBLOCK -#define _POSIX_ -#define INT64_FMT "I64d" - -#define WINCDECL __cdecl -#define SHUT_WR 1 +#endif +#ifndef va_copy +#define va_copy(x,y) x = y +#endif // MINGW #defines va_copy #define snprintf _snprintf #define vsnprintf _vsnprintf -#define mg_sleep(x) Sleep(x) - -#define pipe(x) _pipe(x, MG_BUF_LEN, _O_BINARY) -#ifndef popen -#define popen(x, y) _popen(x, y) -#endif -#ifndef pclose -#define pclose(x) _pclose(x) -#endif -#define close(x) _close(x) -#define dlsym(x,y) GetProcAddress((HINSTANCE) (x), (y)) -#define RTLD_LAZY 0 -#define fseeko(x, y, z) _lseeki64(_fileno(x), (y), (z)) -#define fdopen(x, y) _fdopen((x), (y)) -#define write(x, y, z) _write((x), (y), (unsigned) z) -#define read(x, y, z) _read((x), (y), (unsigned) z) -#define flockfile(x) EnterCriticalSection(&global_log_file_lock) -#define funlockfile(x) LeaveCriticalSection(&global_log_file_lock) #define sleep(x) Sleep((x) * 1000) - -#if !defined(va_copy) -#define va_copy(x, y) x = y -#endif // !va_copy MINGW #defines va_copy - -#if !defined(fileno) -#define fileno(x) _fileno(x) -#endif // !fileno MINGW #defines fileno - -typedef HANDLE pthread_mutex_t; -typedef struct {HANDLE signal, broadcast;} pthread_cond_t; -typedef DWORD pthread_t; -#define pid_t HANDLE // MINGW typedefs pid_t to int. Using #define here. - -static int pthread_mutex_lock(pthread_mutex_t *); -static int pthread_mutex_unlock(pthread_mutex_t *); -static void to_unicode(const char *path, wchar_t *wbuf, size_t wbuf_len); -struct file; -static char *mg_fgets(char *buf, size_t size, struct file *filep, char **p); - -#if defined(HAVE_STDINT) -#include <stdint.h> -#else -typedef unsigned int uint32_t; -typedef unsigned short uint16_t; +#define to64(x) _atoi64(x) +typedef int socklen_t; +typedef unsigned char uint8_t; +typedef unsigned int uint32_t; +typedef unsigned short uint16_t; typedef unsigned __int64 uint64_t; typedef __int64 int64_t; -#if defined(__GNUC__) || defined(_MSC_VER) -#define U64(val) val##ULL +typedef SOCKET sock_t; #else -#define U64(val) val +#include <errno.h> +#include <fcntl.h> +#include <netdb.h> +#include <pthread.h> +#include <stdarg.h> +#include <unistd.h> +#include <arpa/inet.h> // For inet_pton() when NS_ENABLE_IPV6 is defined +#include <netinet/in.h> +#include <sys/socket.h> +#include <sys/select.h> +#define closesocket(x) close(x) +#define __cdecl +#define INVALID_SOCKET (-1) +#define to64(x) strtoll(x, NULL, 10) +typedef int sock_t; #endif -#define INT64_MAX U64(9223372036854775807) -#endif // HAVE_STDINT - -// POSIX dirent interface -struct dirent { - char d_name[PATH_MAX]; -}; - -typedef struct DIR { - HANDLE handle; - WIN32_FIND_DATAW info; - struct dirent result; -} DIR; - -// Mark required libraries -#ifdef _MSC_VER -#pragma comment(lib, "Ws2_32.lib") +#ifdef NS_ENABLE_DEBUG +#define DBG(x) do { printf("%-20s ", __func__); printf x; putchar('\n'); \ + fflush(stdout); } while(0) +#else +#define DBG(x) #endif -#else // UNIX specific -#include <sys/wait.h> -#include <sys/socket.h> -#ifdef HAVE_POLL -#include <sys/poll.h> -#endif -#include <netinet/in.h> -#include <arpa/inet.h> -#include <sys/time.h> -#include <stdint.h> -#include <inttypes.h> -#include <netdb.h> +#define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0])) -#include <pwd.h> -#include <unistd.h> -#include <dirent.h> -#if !defined(NO_SSL_DL) && !defined(NO_SSL) -#include <dlfcn.h> +#ifdef NS_ENABLE_SSL +#ifdef __APPLE__ +#pragma GCC diagnostic ignored "-Wdeprecated-declarations" #endif -#include <pthread.h> -#if defined(__MACH__) -#define SSL_LIB "libssl.dylib" -#define CRYPTO_LIB "libcrypto.dylib" +#include <openssl/ssl.h> #else -#if !defined(SSL_LIB) -#define SSL_LIB "libssl.so" +typedef void *SSL; +typedef void *SSL_CTX; #endif -#if !defined(CRYPTO_LIB) -#define CRYPTO_LIB "libcrypto.so" -#endif -#endif -#ifndef O_BINARY -#define O_BINARY 0 -#endif // O_BINARY -#define closesocket(a) close(a) -#define mg_mkdir(x, y) mkdir(x, y) -#define mg_remove(x) remove(x) -#define mg_sleep(x) usleep((x) * 1000) -#define ERRNO errno -#define INVALID_SOCKET (-1) -#define INT64_FMT PRId64 -typedef int SOCKET; -#define WINCDECL -#endif // End of Windows and UNIX specific includes +#ifdef __cplusplus +extern "C" { +#endif // __cplusplus -#ifdef __OS2__ -#define NO_SOCKLEN_T -#define SHUT_WR 1 +union socket_address { + struct sockaddr sa; + struct sockaddr_in sin; +#ifdef NS_ENABLE_IPV6 + struct sockaddr_in6 sin6; #endif - -#ifndef HAVE_POLL -struct pollfd { - int fd; - short events; - short revents; }; -#define POLLIN 1 -#endif -#include "mongoose.h" +// IO buffers interface +struct iobuf { + char *buf; + size_t len; + size_t size; +}; -#define MONGOOSE_VERSION "3.8" -#define PASSWORDS_FILE_NAME ".htpasswd" -#define CGI_ENVIRONMENT_SIZE 4096 -#define MAX_CGI_ENVIR_VARS 64 -#define MG_BUF_LEN 8192 -#define MAX_REQUEST_SIZE 16384 -#define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0])) +void iobuf_init(struct iobuf *, size_t initial_size); +void iobuf_free(struct iobuf *); +size_t iobuf_append(struct iobuf *, const void *data, size_t data_size); +void iobuf_remove(struct iobuf *, size_t data_size); + +// Net skeleton interface +// Events. Meaning of event parameter (evp) is given in the comment. +enum ns_event { + NS_POLL, // Sent to each connection on each call to ns_server_poll() + NS_ACCEPT, // New connection accept()-ed. union socket_address *remote_addr + NS_CONNECT, // connect() succeeded or failed. int *success_status + NS_RECV, // Data has benn received. int *num_bytes + NS_SEND, // Data has been written to a socket. int *num_bytes + NS_CLOSE // Connection is closed. NULL +}; -#ifdef _WIN32 -static CRITICAL_SECTION global_log_file_lock; -#if !defined(NO_SSL) -static pthread_t pthread_self(void) { - return GetCurrentThreadId(); -} -#endif -#endif // _WIN32 +// Callback function (event handler) prototype, must be defined by user. +// Net skeleton will call event handler, passing events defined above. +struct ns_connection; +typedef void (*ns_callback_t)(struct ns_connection *, enum ns_event, void *evp); + +struct ns_server { + void *server_data; + sock_t listening_sock; + struct ns_connection *active_connections; + ns_callback_t callback; + SSL_CTX *ssl_ctx; + SSL_CTX *client_ssl_ctx; + sock_t ctl[2]; +}; -#ifdef DEBUG_TRACE -#undef DEBUG_TRACE -#define DEBUG_TRACE(x) -#else -#if defined(DEBUG) -#define DEBUG_TRACE(x) do { \ - flockfile(stdout); \ - printf("*** %lu.%p.%s.%d: ", \ - (unsigned long) time(NULL), (void *) pthread_self(), \ - __func__, __LINE__); \ - printf x; \ - putchar('\n'); \ - fflush(stdout); \ - funlockfile(stdout); \ -} while (0) -#else -#define DEBUG_TRACE(x) -#endif // DEBUG -#endif // DEBUG_TRACE +struct ns_connection { + struct ns_connection *prev, *next; + struct ns_server *server; + sock_t sock; + union socket_address sa; + struct iobuf recv_iobuf; + struct iobuf send_iobuf; + SSL *ssl; + void *connection_data; + time_t last_io_time; + unsigned int flags; +#define NSF_FINISHED_SENDING_DATA (1 << 0) +#define NSF_BUFFER_BUT_DONT_SEND (1 << 1) +#define NSF_SSL_HANDSHAKE_DONE (1 << 2) +#define NSF_CONNECTING (1 << 3) +#define NSF_CLOSE_IMMEDIATELY (1 << 4) +#define NSF_ACCEPTED (1 << 5) +#define NSF_WANT_READ (1 << 6) +#define NSF_WANT_WRITE (1 << 7) + +#define NSF_USER_1 (1 << 26) +#define NSF_USER_2 (1 << 27) +#define NSF_USER_3 (1 << 28) +#define NSF_USER_4 (1 << 29) +#define NSF_USER_5 (1 << 30) +#define NSF_USER_6 (1 << 31) +}; -// Darwin prior to 7.0 and Win32 do not have socklen_t -#ifdef NO_SOCKLEN_T -typedef int socklen_t; -#endif // NO_SOCKLEN_T -#define _DARWIN_UNLIMITED_SELECT +void ns_server_init(struct ns_server *, void *server_data, ns_callback_t); +void ns_server_free(struct ns_server *); +int ns_server_poll(struct ns_server *, int milli); +void ns_server_wakeup(struct ns_server *); +void ns_server_wakeup_ex(struct ns_server *, ns_callback_t, void *, size_t); +void ns_iterate(struct ns_server *, ns_callback_t cb, void *param); +struct ns_connection *ns_add_sock(struct ns_server *, sock_t sock, void *p); + +int ns_bind(struct ns_server *, const char *addr); +int ns_set_ssl_cert(struct ns_server *, const char *ssl_cert); +int ns_set_ssl_ca_cert(struct ns_server *, const char *ssl_ca_cert); +struct ns_connection *ns_connect(struct ns_server *, const char *host, + int port, int ssl, void *connection_param); + +int ns_send(struct ns_connection *, const void *buf, int len); +int ns_printf(struct ns_connection *, const char *fmt, ...); +int ns_vprintf(struct ns_connection *, const char *fmt, va_list ap); + +// Utility functions +void *ns_start_thread(void *(*f)(void *), void *p); +int ns_socketpair(sock_t [2]); +int ns_socketpair2(sock_t [2], int sock_type); // SOCK_STREAM or SOCK_DGRAM +void ns_set_close_on_exec(sock_t); +void ns_sock_to_str(sock_t sock, char *buf, size_t len, int flags); +int ns_hexdump(const void *buf, int len, char *dst, int dst_len); + +#ifdef __cplusplus +} +#endif // __cplusplus + +#endif // NS_SKELETON_HEADER_INCLUDED +// Copyright (c) 2014 Cesanta Software Limited +// All rights reserved +// +// This software is dual-licensed: you can redistribute it and/or modify +// it under the terms of the GNU General Public License version 2 as +// published by the Free Software Foundation. For the terms of this +// license, see <http://www.gnu.org/licenses/>. +// +// You are free to use this software under the terms of the GNU General +// Public License, but WITHOUT ANY WARRANTY; without even the implied +// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. +// See the GNU General Public License for more details. +// +// Alternatively, you can license this software under a commercial +// license, as set out in <http://cesanta.com/>. -#define IP_ADDR_STR_LEN 50 // IPv6 hex string is 46 chars -#if !defined(MSG_NOSIGNAL) -#define MSG_NOSIGNAL 0 +#ifndef NS_MALLOC +#define NS_MALLOC malloc #endif -#if !defined(SOMAXCONN) -#define SOMAXCONN 100 +#ifndef NS_REALLOC +#define NS_REALLOC realloc #endif -#if !defined(PATH_MAX) -#define PATH_MAX 4096 +#ifndef NS_FREE +#define NS_FREE free #endif -static const char *http_500_error = "Internal Server Error"; - -#if defined(NO_SSL_DL) -#include <openssl/ssl.h> -#else -// SSL loaded dynamically from DLL. -// I put the prototypes here to be independent from OpenSSL source installation. -typedef struct ssl_st SSL; -typedef struct ssl_method_st SSL_METHOD; -typedef struct ssl_ctx_st SSL_CTX; - -struct ssl_func { - const char *name; // SSL function name - void (*ptr)(void); // Function pointer +struct ctl_msg { + ns_callback_t callback; + char message[1024 * 8]; }; -#define SSL_free (* (void (*)(SSL *)) ssl_sw[0].ptr) -#define SSL_accept (* (int (*)(SSL *)) ssl_sw[1].ptr) -#define SSL_connect (* (int (*)(SSL *)) ssl_sw[2].ptr) -#define SSL_read (* (int (*)(SSL *, void *, int)) ssl_sw[3].ptr) -#define SSL_write (* (int (*)(SSL *, const void *,int)) ssl_sw[4].ptr) -#define SSL_get_error (* (int (*)(SSL *, int)) ssl_sw[5].ptr) -#define SSL_set_fd (* (int (*)(SSL *, SOCKET)) ssl_sw[6].ptr) -#define SSL_new (* (SSL * (*)(SSL_CTX *)) ssl_sw[7].ptr) -#define SSL_CTX_new (* (SSL_CTX * (*)(SSL_METHOD *)) ssl_sw[8].ptr) -#define SSLv23_server_method (* (SSL_METHOD * (*)(void)) ssl_sw[9].ptr) -#define SSL_library_init (* (int (*)(void)) ssl_sw[10].ptr) -#define SSL_CTX_use_PrivateKey_file (* (int (*)(SSL_CTX *, \ - const char *, int)) ssl_sw[11].ptr) -#define SSL_CTX_use_certificate_file (* (int (*)(SSL_CTX *, \ - const char *, int)) ssl_sw[12].ptr) -#define SSL_CTX_set_default_passwd_cb \ - (* (void (*)(SSL_CTX *, mg_callback_t)) ssl_sw[13].ptr) -#define SSL_CTX_free (* (void (*)(SSL_CTX *)) ssl_sw[14].ptr) -#define SSL_load_error_strings (* (void (*)(void)) ssl_sw[15].ptr) -#define SSL_CTX_use_certificate_chain_file \ - (* (int (*)(SSL_CTX *, const char *)) ssl_sw[16].ptr) -#define SSLv23_client_method (* (SSL_METHOD * (*)(void)) ssl_sw[17].ptr) -#define SSL_pending (* (int (*)(SSL *)) ssl_sw[18].ptr) -#define SSL_CTX_set_verify (* (void (*)(SSL_CTX *, int, int)) ssl_sw[19].ptr) -#define SSL_shutdown (* (int (*)(SSL *)) ssl_sw[20].ptr) - -#define CRYPTO_num_locks (* (int (*)(void)) crypto_sw[0].ptr) -#define CRYPTO_set_locking_callback \ - (* (void (*)(void (*)(int, int, const char *, int))) crypto_sw[1].ptr) -#define CRYPTO_set_id_callback \ - (* (void (*)(unsigned long (*)(void))) crypto_sw[2].ptr) -#define ERR_get_error (* (unsigned long (*)(void)) crypto_sw[3].ptr) -#define ERR_error_string (* (char * (*)(unsigned long,char *)) crypto_sw[4].ptr) - -// set_ssl_option() function updates this array. -// It loads SSL library dynamically and changes NULLs to the actual addresses -// of respective functions. The macros above (like SSL_connect()) are really -// just calling these functions indirectly via the pointer. -static struct ssl_func ssl_sw[] = { - {"SSL_free", NULL}, - {"SSL_accept", NULL}, - {"SSL_connect", NULL}, - {"SSL_read", NULL}, - {"SSL_write", NULL}, - {"SSL_get_error", NULL}, - {"SSL_set_fd", NULL}, - {"SSL_new", NULL}, - {"SSL_CTX_new", NULL}, - {"SSLv23_server_method", NULL}, - {"SSL_library_init", NULL}, - {"SSL_CTX_use_PrivateKey_file", NULL}, - {"SSL_CTX_use_certificate_file",NULL}, - {"SSL_CTX_set_default_passwd_cb",NULL}, - {"SSL_CTX_free", NULL}, - {"SSL_load_error_strings", NULL}, - {"SSL_CTX_use_certificate_chain_file", NULL}, - {"SSLv23_client_method", NULL}, - {"SSL_pending", NULL}, - {"SSL_CTX_set_verify", NULL}, - {"SSL_shutdown", NULL}, - {NULL, NULL} -}; +void iobuf_init(struct iobuf *iobuf, size_t size) { + iobuf->len = iobuf->size = 0; + iobuf->buf = NULL; -// Similar array as ssl_sw. These functions could be located in different lib. -#if !defined(NO_SSL) -static struct ssl_func crypto_sw[] = { - {"CRYPTO_num_locks", NULL}, - {"CRYPTO_set_locking_callback", NULL}, - {"CRYPTO_set_id_callback", NULL}, - {"ERR_get_error", NULL}, - {"ERR_error_string", NULL}, - {NULL, NULL} -}; -#endif // NO_SSL -#endif // NO_SSL_DL + if (size > 0 && (iobuf->buf = (char *) NS_MALLOC(size)) != NULL) { + iobuf->size = size; + } +} -static const char *month_names[] = { - "Jan", "Feb", "Mar", "Apr", "May", "Jun", - "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" -}; +void iobuf_free(struct iobuf *iobuf) { + if (iobuf != NULL) { + if (iobuf->buf != NULL) NS_FREE(iobuf->buf); + iobuf_init(iobuf, 0); + } +} -// Unified socket address. For IPv6 support, add IPv6 address structure -// in the union u. -union usa { - struct sockaddr sa; - struct sockaddr_in sin; -#if defined(USE_IPV6) - struct sockaddr_in6 sin6; -#endif -}; +size_t iobuf_append(struct iobuf *io, const void *buf, size_t len) { + char *p = NULL; -// Describes a string (chunk of memory). -struct vec { - const char *ptr; - size_t len; -}; + assert(io != NULL); + assert(io->len <= io->size); -struct file { - int is_directory; - time_t modification_time; - int64_t size; - FILE *fp; - const char *membuf; // Non-NULL if file data is in memory - // set to 1 if the content is gzipped - // in which case we need a content-encoding: gzip header - int gzipped; -}; -#define STRUCT_FILE_INITIALIZER {0, 0, 0, NULL, NULL, 0} - -// Describes listening socket, or socket which was accept()-ed by the master -// thread and queued for future handling by the worker thread. -struct socket { - SOCKET sock; // Listening socket - union usa lsa; // Local socket address - union usa rsa; // Remote socket address - unsigned is_ssl:1; // Is port SSL-ed - unsigned ssl_redir:1; // Is port supposed to redirect everything to SSL port -}; + if (len <= 0) { + } else if (io->len + len <= io->size) { + memcpy(io->buf + io->len, buf, len); + io->len += len; + } else if ((p = (char *) NS_REALLOC(io->buf, io->len + len)) != NULL) { + io->buf = p; + memcpy(io->buf + io->len, buf, len); + io->len += len; + io->size = io->len; + } else { + len = 0; + } -// NOTE(lsm): this enum shoulds be in sync with the config_options below. -enum { - CGI_EXTENSIONS, CGI_ENVIRONMENT, PUT_DELETE_PASSWORDS_FILE, CGI_INTERPRETER, - PROTECT_URI, AUTHENTICATION_DOMAIN, SSI_EXTENSIONS, THROTTLE, - ACCESS_LOG_FILE, ENABLE_DIRECTORY_LISTING, ERROR_LOG_FILE, - GLOBAL_PASSWORDS_FILE, INDEX_FILES, ENABLE_KEEP_ALIVE, ACCESS_CONTROL_LIST, - EXTRA_MIME_TYPES, LISTENING_PORTS, DOCUMENT_ROOT, SSL_CERTIFICATE, - NUM_THREADS, RUN_AS_USER, REWRITE, HIDE_FILES, REQUEST_TIMEOUT, - NUM_OPTIONS -}; + return len; +} -static const char *config_options[] = { - "cgi_pattern", "**.cgi$|**.pl$|**.php$", - "cgi_environment", NULL, - "put_delete_auth_file", NULL, - "cgi_interpreter", NULL, - "protect_uri", NULL, - "authentication_domain", "mydomain.com", - "ssi_pattern", "**.shtml$|**.shtm$", - "throttle", NULL, - "access_log_file", NULL, - "enable_directory_listing", "yes", - "error_log_file", NULL, - "global_auth_file", NULL, - "index_files", - "index.html,index.htm,index.cgi,index.shtml,index.php,index.lp", - "enable_keep_alive", "no", - "access_control_list", NULL, - "extra_mime_types", NULL, - "listening_ports", "8080", - "document_root", ".", - "ssl_certificate", NULL, - "num_threads", "50", - "run_as_user", NULL, - "url_rewrite_patterns", NULL, - "hide_files_patterns", NULL, - "request_timeout_ms", "30000", - NULL -}; +void iobuf_remove(struct iobuf *io, size_t n) { + if (n > 0 && n <= io->len) { + memmove(io->buf, io->buf + n, io->len - n); + io->len -= n; + } +} -struct mg_context { - volatile int stop_flag; // Should we stop event loop - SSL_CTX *ssl_ctx; // SSL context - char *config[NUM_OPTIONS]; // Mongoose configuration parameters - struct mg_callbacks callbacks; // User-defined callback function - void *user_data; // User-defined data - - struct socket *listening_sockets; - int num_listening_sockets; - - volatile int num_threads; // Number of threads - pthread_mutex_t mutex; // Protects (max|num)_threads - pthread_cond_t cond; // Condvar for tracking workers terminations - - struct socket queue[20]; // Accepted sockets - volatile int sq_head; // Head of the socket queue - volatile int sq_tail; // Tail of the socket queue - pthread_cond_t sq_full; // Signaled when socket is produced - pthread_cond_t sq_empty; // Signaled when socket is consumed -}; +#ifndef NS_DISABLE_THREADS +void *ns_start_thread(void *(*f)(void *), void *p) { +#ifdef _WIN32 + return (void *) _beginthread((void (__cdecl *)(void *)) f, 0, p); +#else + pthread_t thread_id = (pthread_t) 0; + pthread_attr_t attr; -struct mg_connection { - struct mg_request_info request_info; - struct mg_context *ctx; - SSL *ssl; // SSL descriptor - SSL_CTX *client_ssl_ctx; // SSL context for client connections - struct socket client; // Connected client - time_t birth_time; // Time when request was received - int64_t num_bytes_sent; // Total bytes sent to client - int64_t content_len; // Content-Length header value - int64_t consumed_content; // How many bytes of content have been read - char *buf; // Buffer for received data - char *path_info; // PATH_INFO part of the URL - int must_close; // 1 if connection must be closed - int buf_size; // Buffer size - int request_len; // Size of the request + headers in a buffer - int data_len; // Total size of data in a buffer - int status_code; // HTTP reply status code, e.g. 200 - int throttle; // Throttling, bytes/sec. <= 0 means no throttle - time_t last_throttle_time; // Last time throttled data was sent - int64_t last_throttle_bytes;// Bytes sent this second -}; + (void) pthread_attr_init(&attr); + (void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); -// Directory entry -struct de { - struct mg_connection *conn; - char *file_name; - struct file file; -}; +#if NS_STACK_SIZE > 1 + (void) pthread_attr_setstacksize(&attr, NS_STACK_SIZE); +#endif -const char **mg_get_valid_option_names(void) { - return config_options; + pthread_create(&thread_id, &attr, f, p); + pthread_attr_destroy(&attr); + + return (void *) thread_id; +#endif } +#endif // NS_DISABLE_THREADS -static int is_file_in_memory(struct mg_connection *conn, const char *path, - struct file *filep) { - size_t size = 0; - if ((filep->membuf = conn->ctx->callbacks.open_file == NULL ? NULL : - conn->ctx->callbacks.open_file(conn, path, &size)) != NULL) { - // NOTE: override filep->size only on success. Otherwise, it might break - // constructs like if (!mg_stat() || !mg_fopen()) ... - filep->size = size; - } - return filep->membuf != NULL; +static void ns_add_conn(struct ns_server *server, struct ns_connection *c) { + c->next = server->active_connections; + server->active_connections = c; + c->prev = NULL; + if (c->next != NULL) c->next->prev = c; } -static int is_file_opened(const struct file *filep) { - return filep->membuf != NULL || filep->fp != NULL; +static void ns_remove_conn(struct ns_connection *conn) { + if (conn->prev == NULL) conn->server->active_connections = conn->next; + if (conn->prev) conn->prev->next = conn->next; + if (conn->next) conn->next->prev = conn->prev; } -static int mg_fopen(struct mg_connection *conn, const char *path, - const char *mode, struct file *filep) { - if (!is_file_in_memory(conn, path, filep)) { -#ifdef _WIN32 - wchar_t wbuf[PATH_MAX], wmode[20]; - to_unicode(path, wbuf, ARRAY_SIZE(wbuf)); - MultiByteToWideChar(CP_UTF8, 0, mode, -1, wmode, ARRAY_SIZE(wmode)); - filep->fp = _wfopen(wbuf, wmode); -#else - filep->fp = fopen(path, mode); +// Print message to buffer. If buffer is large enough to hold the message, +// return buffer. If buffer is to small, allocate large enough buffer on heap, +// and return allocated buffer. +static int ns_avprintf(char **buf, size_t size, const char *fmt, va_list ap) { + va_list ap_copy; + int len; + + va_copy(ap_copy, ap); + len = vsnprintf(*buf, size, fmt, ap_copy); + va_end(ap_copy); + + if (len < 0) { + // eCos and Windows are not standard-compliant and return -1 when + // the buffer is too small. Keep allocating larger buffers until we + // succeed or out of memory. + *buf = NULL; + while (len < 0) { + if (*buf) free(*buf); + size *= 2; + if ((*buf = (char *) NS_MALLOC(size)) == NULL) break; + va_copy(ap_copy, ap); + len = vsnprintf(*buf, size, fmt, ap_copy); + va_end(ap_copy); + } + } else if (len > (int) size) { + // Standard-compliant code path. Allocate a buffer that is large enough. + if ((*buf = (char *) NS_MALLOC(len + 1)) == NULL) { + len = -1; + } else { + va_copy(ap_copy, ap); + len = vsnprintf(*buf, len + 1, fmt, ap_copy); + va_end(ap_copy); + } + } + + return len; +} + +int ns_vprintf(struct ns_connection *conn, const char *fmt, va_list ap) { + char mem[2000], *buf = mem; + int len; + + if ((len = ns_avprintf(&buf, sizeof(mem), fmt, ap)) > 0) { + iobuf_append(&conn->send_iobuf, buf, len); + } + if (buf != mem && buf != NULL) { + free(buf); + } + + return len; +} + +int ns_printf(struct ns_connection *conn, const char *fmt, ...) { + int len; + va_list ap; + va_start(ap, fmt); + len = ns_vprintf(conn, fmt, ap); + va_end(ap); + return len; +} + +static void ns_call(struct ns_connection *conn, enum ns_event ev, void *p) { + if (conn->server->callback) conn->server->callback(conn, ev, p); +} + +static void ns_close_conn(struct ns_connection *conn) { + DBG(("%p %d", conn, conn->flags)); + ns_call(conn, NS_CLOSE, NULL); + ns_remove_conn(conn); + closesocket(conn->sock); + iobuf_free(&conn->recv_iobuf); + iobuf_free(&conn->send_iobuf); +#ifdef NS_ENABLE_SSL + if (conn->ssl != NULL) { + SSL_free(conn->ssl); + } #endif - } - - return is_file_opened(filep); + NS_FREE(conn); } -static void mg_fclose(struct file *filep) { - if (filep != NULL && filep->fp != NULL) { - fclose(filep->fp); - } +void ns_set_close_on_exec(sock_t sock) { +#ifdef _WIN32 + (void) SetHandleInformation((HANDLE) sock, HANDLE_FLAG_INHERIT, 0); +#else + fcntl(sock, F_SETFD, FD_CLOEXEC); +#endif } -static int get_option_index(const char *name) { - int i; - - for (i = 0; config_options[i * 2] != NULL; i++) { - if (strcmp(config_options[i * 2], name) == 0) { - return i; - } - } - return -1; -} - -const char *mg_get_option(const struct mg_context *ctx, const char *name) { - int i; - if ((i = get_option_index(name)) == -1) { - return NULL; - } else if (ctx->config[i] == NULL) { - return ""; - } else { - return ctx->config[i]; - } -} - -static void sockaddr_to_string(char *buf, size_t len, - const union usa *usa) { - buf[0] = '\0'; -#if defined(USE_IPV6) - inet_ntop(usa->sa.sa_family, usa->sa.sa_family == AF_INET ? - (void *) &usa->sin.sin_addr : - (void *) &usa->sin6.sin6_addr, buf, len); -#elif defined(_WIN32) - // Only Windoze Vista (and newer) have inet_ntop() - strncpy(buf, inet_ntoa(usa->sin.sin_addr), len); +static void ns_set_non_blocking_mode(sock_t sock) { +#ifdef _WIN32 + unsigned long on = 1; + ioctlsocket(sock, FIONBIO, &on); #else - inet_ntop(usa->sa.sa_family, (void *) &usa->sin.sin_addr, buf, len); + int flags = fcntl(sock, F_GETFL, 0); + fcntl(sock, F_SETFL, flags | O_NONBLOCK); #endif } -static void cry(struct mg_connection *conn, - PRINTF_FORMAT_STRING(const char *fmt), ...) PRINTF_ARGS(2, 3); - -// Print error message to the opened error log stream. -static void cry(struct mg_connection *conn, const char *fmt, ...) { - char buf[MG_BUF_LEN], src_addr[IP_ADDR_STR_LEN]; - va_list ap; - FILE *fp; - time_t timestamp; +#ifndef NS_DISABLE_SOCKETPAIR +int ns_socketpair2(sock_t sp[2], int sock_type) { + union socket_address sa; + sock_t sock; + socklen_t len = sizeof(sa.sin); + int ret = 0; + + sp[0] = sp[1] = INVALID_SOCKET; + + (void) memset(&sa, 0, sizeof(sa)); + sa.sin.sin_family = AF_INET; + sa.sin.sin_port = htons(0); + sa.sin.sin_addr.s_addr = htonl(0x7f000001); + + if ((sock = socket(AF_INET, sock_type, 0)) != INVALID_SOCKET && + !bind(sock, &sa.sa, len) && + (sock_type == SOCK_DGRAM || !listen(sock, 1)) && + !getsockname(sock, &sa.sa, &len) && + (sp[0] = socket(AF_INET, sock_type, 0)) != INVALID_SOCKET && + !connect(sp[0], &sa.sa, len) && + (sock_type == SOCK_STREAM || + (!getsockname(sp[0], &sa.sa, &len) && !connect(sock, &sa.sa, len))) && + (sp[1] = (sock_type == SOCK_DGRAM ? sock : + accept(sock, &sa.sa, &len))) != INVALID_SOCKET) { + ns_set_close_on_exec(sp[0]); + ns_set_close_on_exec(sp[1]); + ret = 1; + } else { + if (sp[0] != INVALID_SOCKET) closesocket(sp[0]); + if (sp[1] != INVALID_SOCKET) closesocket(sp[1]); + sp[0] = sp[1] = INVALID_SOCKET; + } + if (sock_type != SOCK_DGRAM) closesocket(sock); + + return ret; +} + +int ns_socketpair(sock_t sp[2]) { + return ns_socketpair2(sp, SOCK_STREAM); +} +#endif // NS_DISABLE_SOCKETPAIR + +// Valid listening port spec is: [ip_address:]port, e.g. "80", "127.0.0.1:3128" +static int ns_parse_port_string(const char *str, union socket_address *sa) { + unsigned int a, b, c, d, port; + int len = 0; +#ifdef NS_ENABLE_IPV6 + char buf[100]; +#endif - va_start(ap, fmt); - (void) vsnprintf(buf, sizeof(buf), fmt, ap); - va_end(ap); + // MacOS needs that. If we do not zero it, subsequent bind() will fail. + // Also, all-zeroes in the socket address means binding to all addresses + // for both IPv4 and IPv6 (INADDR_ANY and IN6ADDR_ANY_INIT). + memset(sa, 0, sizeof(*sa)); + sa->sin.sin_family = AF_INET; + + if (sscanf(str, "%u.%u.%u.%u:%u%n", &a, &b, &c, &d, &port, &len) == 5) { + // Bind to a specific IPv4 address, e.g. 192.168.1.5:8080 + sa->sin.sin_addr.s_addr = htonl((a << 24) | (b << 16) | (c << 8) | d); + sa->sin.sin_port = htons((uint16_t) port); +#ifdef NS_ENABLE_IPV6 + } else if (sscanf(str, "[%49[^]]]:%u%n", buf, &port, &len) == 2 && + inet_pton(AF_INET6, buf, &sa->sin6.sin6_addr)) { + // IPv6 address, e.g. [3ffe:2a00:100:7031::1]:8080 + sa->sin6.sin6_family = AF_INET6; + sa->sin6.sin6_port = htons((uint16_t) port); +#endif + } else if (sscanf(str, "%u%n", &port, &len) == 1) { + // If only port is specified, bind to IPv4, INADDR_ANY + sa->sin.sin_port = htons((uint16_t) port); + } else { + port = 0; // Parsing failure. Make port invalid. + } - // Do not lock when getting the callback value, here and below. - // I suppose this is fine, since function cannot disappear in the - // same way string option can. - if (conn->ctx->callbacks.log_message == NULL || - conn->ctx->callbacks.log_message(conn, buf) == 0) { - fp = conn->ctx == NULL || conn->ctx->config[ERROR_LOG_FILE] == NULL ? NULL : - fopen(conn->ctx->config[ERROR_LOG_FILE], "a+"); + return port <= 0xffff && str[len] == '\0'; +} - if (fp != NULL) { - flockfile(fp); - timestamp = time(NULL); +// 'sa' must be an initialized address to bind to +static sock_t ns_open_listening_socket(union socket_address *sa) { + socklen_t len = sizeof(*sa); + sock_t sock = INVALID_SOCKET; +#ifndef _WIN32 + int on = 1; +#endif - sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa); - fprintf(fp, "[%010lu] [error] [client %s] ", (unsigned long) timestamp, - src_addr); + if ((sock = socket(sa->sa.sa_family, SOCK_STREAM, 6)) != INVALID_SOCKET && +#ifndef _WIN32 + !setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void *) &on, sizeof(on)) && +#endif + !bind(sock, &sa->sa, sa->sa.sa_family == AF_INET ? + sizeof(sa->sin) : sizeof(sa->sa)) && + !listen(sock, SOMAXCONN)) { + ns_set_non_blocking_mode(sock); + // In case port was set to 0, get the real port number + (void) getsockname(sock, &sa->sa, &len); + } else if (sock != INVALID_SOCKET) { + closesocket(sock); + sock = INVALID_SOCKET; + } + + return sock; +} + +// Certificate generation script is at +// https://github.com/cesanta/net_skeleton/blob/master/examples/gen_certs.sh +int ns_set_ssl_ca_cert(struct ns_server *server, const char *cert) { +#ifdef NS_ENABLE_SSL + STACK_OF(X509_NAME) *list = SSL_load_client_CA_file(cert); + if (cert != NULL && server->ssl_ctx != NULL && list != NULL) { + SSL_CTX_set_client_CA_list(server->ssl_ctx, list); + SSL_CTX_set_verify(server->ssl_ctx, SSL_VERIFY_PEER | + SSL_VERIFY_FAIL_IF_NO_PEER_CERT, NULL); + return 0; + } +#endif + return server != NULL && cert == NULL ? 0 : -1; +} + +int ns_set_ssl_cert(struct ns_server *server, const char *cert) { +#ifdef NS_ENABLE_SSL + if (cert != NULL && + (server->ssl_ctx = SSL_CTX_new(SSLv23_server_method())) == NULL) { + return -1; + } else if (SSL_CTX_use_certificate_file(server->ssl_ctx, cert, 1) == 0 || + SSL_CTX_use_PrivateKey_file(server->ssl_ctx, cert, 1) == 0) { + return -2; + } else { + SSL_CTX_use_certificate_chain_file(server->ssl_ctx, cert); + return 0; + } +#endif + return server != NULL && cert == NULL ? 0 : -3; +} + +int ns_bind(struct ns_server *server, const char *str) { + union socket_address sa; + ns_parse_port_string(str, &sa); + if (server->listening_sock != INVALID_SOCKET) { + closesocket(server->listening_sock); + } + server->listening_sock = ns_open_listening_socket(&sa); + return server->listening_sock == INVALID_SOCKET ? -1 : + (int) ntohs(sa.sin.sin_port); +} + + +static struct ns_connection *accept_conn(struct ns_server *server) { + struct ns_connection *c = NULL; + union socket_address sa; + socklen_t len = sizeof(sa); + sock_t sock = INVALID_SOCKET; + + // NOTE(lsm): on Windows, sock is always > FD_SETSIZE + if ((sock = accept(server->listening_sock, &sa.sa, &len)) == INVALID_SOCKET) { + } else if ((c = (struct ns_connection *) NS_MALLOC(sizeof(*c))) == NULL || + memset(c, 0, sizeof(*c)) == NULL) { + closesocket(sock); +#ifdef NS_ENABLE_SSL + } else if (server->ssl_ctx != NULL && + ((c->ssl = SSL_new(server->ssl_ctx)) == NULL || + SSL_set_fd(c->ssl, sock) != 1)) { + DBG(("SSL error")); + closesocket(sock); + free(c); + c = NULL; +#endif + } else { + ns_set_close_on_exec(sock); + ns_set_non_blocking_mode(sock); + c->server = server; + c->sock = sock; + c->flags |= NSF_ACCEPTED; - if (conn->request_info.request_method != NULL) { - fprintf(fp, "%s %s: ", conn->request_info.request_method, - conn->request_info.uri); - } + ns_add_conn(server, c); + ns_call(c, NS_ACCEPT, &sa); + DBG(("%p %d %p %p", c, c->sock, c->ssl, server->ssl_ctx)); + } - fprintf(fp, "%s", buf); - fputc('\n', fp); - funlockfile(fp); - fclose(fp); - } - } + return c; } -// Return fake connection structure. Used for logging, if connection -// is not applicable at the moment of logging. -static struct mg_connection *fc(struct mg_context *ctx) { - static struct mg_connection fake_connection; - fake_connection.ctx = ctx; - return &fake_connection; +static int ns_is_error(int n) { + return n == 0 || + (n < 0 && errno != EINTR && errno != EINPROGRESS && + errno != EAGAIN && errno != EWOULDBLOCK +#ifdef _WIN32 + && WSAGetLastError() != WSAEINTR && WSAGetLastError() != WSAEWOULDBLOCK +#endif + ); +} + +void ns_sock_to_str(sock_t sock, char *buf, size_t len, int flags) { + union socket_address sa; + socklen_t slen = sizeof(sa); + + if (buf != NULL && len > 0) { + buf[0] = '\0'; + memset(&sa, 0, sizeof(sa)); + if (flags & 4) { + getpeername(sock, &sa.sa, &slen); + } else { + getsockname(sock, &sa.sa, &slen); + } + if (flags & 1) { +#if defined(NS_ENABLE_IPV6) + inet_ntop(sa.sa.sa_family, sa.sa.sa_family == AF_INET ? + (void *) &sa.sin.sin_addr : + (void *) &sa.sin6.sin6_addr, buf, len); +#elif defined(_WIN32) + // Only Windoze Vista (and newer) have inet_ntop() + strncpy(buf, inet_ntoa(sa.sin.sin_addr), len); +#else + inet_ntop(sa.sa.sa_family, (void *) &sa.sin.sin_addr, buf, len); +#endif + } + if (flags & 2) { + snprintf(buf + strlen(buf), len - (strlen(buf) + 1), ":%d", + (int) ntohs(sa.sin.sin_port)); + } + } +} + +int ns_hexdump(const void *buf, int len, char *dst, int dst_len) { + const unsigned char *p = (const unsigned char *) buf; + char ascii[17] = ""; + int i, idx, n = 0; + + for (i = 0; i < len; i++) { + idx = i % 16; + if (idx == 0) { + if (i > 0) n += snprintf(dst + n, dst_len - n, " %s\n", ascii); + n += snprintf(dst + n, dst_len - n, "%04x ", i); + } + n += snprintf(dst + n, dst_len - n, " %02x", p[i]); + ascii[idx] = p[i] < 0x20 || p[i] > 0x7e ? '.' : p[i]; + ascii[idx + 1] = '\0'; + } + + while (i++ % 16) n += snprintf(dst + n, dst_len - n, "%s", " "); + n += snprintf(dst + n, dst_len - n, " %s\n\n", ascii); + + return n; +} + +static void ns_read_from_socket(struct ns_connection *conn) { + char buf[2048]; + int n = 0; + + if (conn->flags & NSF_CONNECTING) { + int ok = 1, ret; + socklen_t len = sizeof(ok); + + ret = getsockopt(conn->sock, SOL_SOCKET, SO_ERROR, (char *) &ok, &len); + (void) ret; +#ifdef NS_ENABLE_SSL + if (ret == 0 && ok == 0 && conn->ssl != NULL) { + int res = SSL_connect(conn->ssl); + int ssl_err = SSL_get_error(conn->ssl, res); + DBG(("%p %d wres %d %d", conn, conn->flags, res, ssl_err)); + if (ssl_err == SSL_ERROR_WANT_READ) conn->flags |= NSF_WANT_READ; + if (ssl_err == SSL_ERROR_WANT_WRITE) conn->flags |= NSF_WANT_WRITE; + if (res == 1) { + conn->flags |= NSF_SSL_HANDSHAKE_DONE; + } else if (ssl_err == SSL_ERROR_WANT_READ || + ssl_err == SSL_ERROR_WANT_WRITE) { + return; // Call us again + } else { + ok = 1; + } + } +#endif + conn->flags &= ~NSF_CONNECTING; + DBG(("%p ok=%d", conn, ok)); + if (ok != 0) { + conn->flags |= NSF_CLOSE_IMMEDIATELY; + } + ns_call(conn, NS_CONNECT, &ok); + return; + } + +#ifdef NS_ENABLE_SSL + if (conn->ssl != NULL) { + if (conn->flags & NSF_SSL_HANDSHAKE_DONE) { + n = SSL_read(conn->ssl, buf, sizeof(buf)); + } else { + int res = SSL_accept(conn->ssl); + int ssl_err = SSL_get_error(conn->ssl, res); + DBG(("%p %d rres %d %d", conn, conn->flags, res, ssl_err)); + if (ssl_err == SSL_ERROR_WANT_READ) conn->flags |= NSF_WANT_READ; + if (ssl_err == SSL_ERROR_WANT_WRITE) conn->flags |= NSF_WANT_WRITE; + if (res == 1) { + conn->flags |= NSF_SSL_HANDSHAKE_DONE; + } else if (ssl_err == SSL_ERROR_WANT_READ || + ssl_err == SSL_ERROR_WANT_WRITE) { + return; // Call us again + } else { + conn->flags |= NSF_CLOSE_IMMEDIATELY; + } + return; + } + } else +#endif + { + n = recv(conn->sock, buf, sizeof(buf), 0); + } + + DBG(("%p %d <- %d bytes", conn, conn->flags, n)); + + if (ns_is_error(n)) { + conn->flags |= NSF_CLOSE_IMMEDIATELY; + } else if (n > 0) { + iobuf_append(&conn->recv_iobuf, buf, n); + ns_call(conn, NS_RECV, &n); + } +} + +static void ns_write_to_socket(struct ns_connection *conn) { + struct iobuf *io = &conn->send_iobuf; + int n = 0; + +#ifdef NS_ENABLE_SSL + if (conn->ssl != NULL) { + n = SSL_write(conn->ssl, io->buf, io->len); + if (n < 0) { + int ssl_err = SSL_get_error(conn->ssl, n); + DBG(("%p %d %d", conn, n, ssl_err)); + if (ssl_err == 2 || ssl_err == 3) { + return; // Call us again + } else { + conn->flags |= NSF_CLOSE_IMMEDIATELY; + } + } + } else +#endif + { n = send(conn->sock, io->buf, io->len, 0); } + + DBG(("%p %d -> %d bytes", conn, conn->flags, n)); + + ns_call(conn, NS_SEND, &n); + if (ns_is_error(n)) { + conn->flags |= NSF_CLOSE_IMMEDIATELY; + } else if (n > 0) { + iobuf_remove(io, n); + } + + if (io->len == 0 && conn->flags & NSF_FINISHED_SENDING_DATA) { + conn->flags |= NSF_CLOSE_IMMEDIATELY; + } +} + +int ns_send(struct ns_connection *conn, const void *buf, int len) { + return iobuf_append(&conn->send_iobuf, buf, len); +} + +static void ns_add_to_set(sock_t sock, fd_set *set, sock_t *max_fd) { + if (sock != INVALID_SOCKET) { + FD_SET(sock, set); + if (*max_fd == INVALID_SOCKET || sock > *max_fd) { + *max_fd = sock; + } + } +} + +int ns_server_poll(struct ns_server *server, int milli) { + struct ns_connection *conn, *tmp_conn; + struct timeval tv; + fd_set read_set, write_set; + int num_active_connections = 0; + sock_t max_fd = INVALID_SOCKET; + time_t current_time = time(NULL); + + if (server->listening_sock == INVALID_SOCKET && + server->active_connections == NULL) return 0; + + FD_ZERO(&read_set); + FD_ZERO(&write_set); + ns_add_to_set(server->listening_sock, &read_set, &max_fd); + ns_add_to_set(server->ctl[1], &read_set, &max_fd); + + for (conn = server->active_connections; conn != NULL; conn = tmp_conn) { + tmp_conn = conn->next; + ns_call(conn, NS_POLL, ¤t_time); + if (!(conn->flags & NSF_WANT_WRITE)) { + //DBG(("%p read_set", conn)); + ns_add_to_set(conn->sock, &read_set, &max_fd); + } + if (((conn->flags & NSF_CONNECTING) && !(conn->flags & NSF_WANT_READ)) || + (conn->send_iobuf.len > 0 && !(conn->flags & NSF_CONNECTING) && + !(conn->flags & NSF_BUFFER_BUT_DONT_SEND))) { + //DBG(("%p write_set", conn)); + ns_add_to_set(conn->sock, &write_set, &max_fd); + } + if (conn->flags & NSF_CLOSE_IMMEDIATELY) { + ns_close_conn(conn); + } + } + + tv.tv_sec = milli / 1000; + tv.tv_usec = (milli % 1000) * 1000; + + if (select((int) max_fd + 1, &read_set, &write_set, NULL, &tv) > 0) { + // Accept new connections + if (server->listening_sock != INVALID_SOCKET && + FD_ISSET(server->listening_sock, &read_set)) { + // We're not looping here, and accepting just one connection at + // a time. The reason is that eCos does not respect non-blocking + // flag on a listening socket and hangs in a loop. + if ((conn = accept_conn(server)) != NULL) { + conn->last_io_time = current_time; + } + } + + // Read wakeup messages + if (server->ctl[1] != INVALID_SOCKET && + FD_ISSET(server->ctl[1], &read_set)) { + struct ctl_msg ctl_msg; + int len = recv(server->ctl[1], (char *) &ctl_msg, sizeof(ctl_msg), 0); + send(server->ctl[1], ctl_msg.message, 1, 0); + if (len >= (int) sizeof(ctl_msg.callback) && ctl_msg.callback != NULL) { + ns_iterate(server, ctl_msg.callback, ctl_msg.message); + } + } + + for (conn = server->active_connections; conn != NULL; conn = tmp_conn) { + tmp_conn = conn->next; + //DBG(("%p LOOP %p", conn, conn->ssl)); + if (FD_ISSET(conn->sock, &read_set)) { + conn->last_io_time = current_time; + ns_read_from_socket(conn); + } + if (FD_ISSET(conn->sock, &write_set)) { + if (conn->flags & NSF_CONNECTING) { + ns_read_from_socket(conn); + } else if (!(conn->flags & NSF_BUFFER_BUT_DONT_SEND)) { + conn->last_io_time = current_time; + ns_write_to_socket(conn); + } + } + } + } + + for (conn = server->active_connections; conn != NULL; conn = tmp_conn) { + tmp_conn = conn->next; + num_active_connections++; + if (conn->flags & NSF_CLOSE_IMMEDIATELY) { + ns_close_conn(conn); + } + } + //DBG(("%d active connections", num_active_connections)); + + return num_active_connections; +} + +struct ns_connection *ns_connect(struct ns_server *server, const char *host, + int port, int use_ssl, void *param) { + sock_t sock = INVALID_SOCKET; + struct sockaddr_in sin; + struct hostent *he = NULL; + struct ns_connection *conn = NULL; + int connect_ret_val; + + (void) use_ssl; + + if (host == NULL || (he = gethostbyname(host)) == NULL || + (sock = socket(AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) { + DBG(("gethostbyname(%s) failed: %s", host, strerror(errno))); + return NULL; + } + + sin.sin_family = AF_INET; + sin.sin_port = htons((uint16_t) port); + sin.sin_addr = * (struct in_addr *) he->h_addr_list[0]; + ns_set_non_blocking_mode(sock); + + connect_ret_val = connect(sock, (struct sockaddr *) &sin, sizeof(sin)); + if (ns_is_error(connect_ret_val)) { + closesocket(sock); + return NULL; + } else if ((conn = (struct ns_connection *) + NS_MALLOC(sizeof(*conn))) == NULL) { + closesocket(sock); + return NULL; + } + + memset(conn, 0, sizeof(*conn)); + conn->server = server; + conn->sock = sock; + conn->connection_data = param; + conn->flags = NSF_CONNECTING; + conn->last_io_time = time(NULL); + +#ifdef NS_ENABLE_SSL + if (use_ssl && + (conn->ssl = SSL_new(server->client_ssl_ctx)) != NULL) { + SSL_set_fd(conn->ssl, sock); + } +#endif + + ns_add_conn(server, conn); + DBG(("%p %s:%d %d %p", conn, host, port, conn->sock, conn->ssl)); + + return conn; } -const char *mg_version(void) { - return MONGOOSE_VERSION; +struct ns_connection *ns_add_sock(struct ns_server *s, sock_t sock, void *p) { + struct ns_connection *conn; + if ((conn = (struct ns_connection *) NS_MALLOC(sizeof(*conn))) != NULL) { + memset(conn, 0, sizeof(*conn)); + ns_set_non_blocking_mode(sock); + conn->sock = sock; + conn->connection_data = p; + conn->server = s; + conn->last_io_time = time(NULL); + ns_add_conn(s, conn); + DBG(("%p %d", conn, sock)); + } + return conn; } -struct mg_request_info *mg_get_request_info(struct mg_connection *conn) { - return &conn->request_info; +void ns_iterate(struct ns_server *server, ns_callback_t cb, void *param) { + struct ns_connection *conn, *tmp_conn; + + for (conn = server->active_connections; conn != NULL; conn = tmp_conn) { + tmp_conn = conn->next; + cb(conn, NS_POLL, param); + } } -static void mg_strlcpy(register char *dst, register const char *src, size_t n) { - for (; *src != '\0' && n > 1; n--) { - *dst++ = *src++; - } - *dst = '\0'; +void ns_server_wakeup_ex(struct ns_server *server, ns_callback_t cb, + void *data, size_t len) { + struct ctl_msg ctl_msg; + if (server->ctl[0] != INVALID_SOCKET && data != NULL && + len < sizeof(ctl_msg.message)) { + ctl_msg.callback = cb; + memcpy(ctl_msg.message, data, len); + send(server->ctl[0], (char *) &ctl_msg, + offsetof(struct ctl_msg, message) + len, 0); + recv(server->ctl[0], (char *) &len, 1, 0); + } } -static int lowercase(const char *s) { - return tolower(* (const unsigned char *) s); +void ns_server_wakeup(struct ns_server *server) { + ns_server_wakeup_ex(server, NULL, (void *) "", 0); } -static int mg_strncasecmp(const char *s1, const char *s2, size_t len) { - int diff = 0; +void ns_server_init(struct ns_server *s, void *server_data, ns_callback_t cb) { + memset(s, 0, sizeof(*s)); + s->listening_sock = s->ctl[0] = s->ctl[1] = INVALID_SOCKET; + s->server_data = server_data; + s->callback = cb; + +#ifdef _WIN32 + { WSADATA data; WSAStartup(MAKEWORD(2, 2), &data); } +#else + // Ignore SIGPIPE signal, so if client cancels the request, it + // won't kill the whole process. + signal(SIGPIPE, SIG_IGN); +#endif - if (len > 0) - do { - diff = lowercase(s1++) - lowercase(s2++); - } while (diff == 0 && s1[-1] != '\0' && --len > 0); +#ifndef NS_DISABLE_SOCKETPAIR + do { + ns_socketpair2(s->ctl, SOCK_DGRAM); + } while (s->ctl[0] == INVALID_SOCKET); +#endif - return diff; +#ifdef NS_ENABLE_SSL + SSL_library_init(); + s->client_ssl_ctx = SSL_CTX_new(SSLv23_client_method()); +#endif } -static int mg_strcasecmp(const char *s1, const char *s2) { - int diff; +void ns_server_free(struct ns_server *s) { + struct ns_connection *conn, *tmp_conn; + + DBG(("%p", s)); + if (s == NULL) return; + // Do one last poll, see https://github.com/cesanta/mongoose/issues/286 + ns_server_poll(s, 0); + + if (s->listening_sock != INVALID_SOCKET) closesocket(s->listening_sock); + if (s->ctl[0] != INVALID_SOCKET) closesocket(s->ctl[0]); + if (s->ctl[1] != INVALID_SOCKET) closesocket(s->ctl[1]); + s->listening_sock = s->ctl[0] = s->ctl[1] = INVALID_SOCKET; - do { - diff = lowercase(s1++) - lowercase(s2++); - } while (diff == 0 && s1[-1] != '\0'); + for (conn = s->active_connections; conn != NULL; conn = tmp_conn) { + tmp_conn = conn->next; + ns_close_conn(conn); + } - return diff; +#ifdef NS_ENABLE_SSL + if (s->ssl_ctx != NULL) SSL_CTX_free(s->ssl_ctx); + if (s->client_ssl_ctx != NULL) SSL_CTX_free(s->client_ssl_ctx); + s->ssl_ctx = s->client_ssl_ctx = NULL; +#endif } +// net_skeleton end +#endif // NOEMBED_NET_SKELETON -static char * mg_strndup(const char *ptr, size_t len) { - char *p; +#include <ctype.h> - if ((p = (char *) malloc(len + 1)) != NULL) { - mg_strlcpy(p, ptr, len + 1); - } +#ifdef _WIN32 //////////////// Windows specific defines and includes +#include <io.h> // For _lseeki64 +#include <direct.h> // For _mkdir +#ifndef S_ISDIR +#define S_ISDIR(x) ((x) & _S_IFDIR) +#endif +#ifdef stat +#undef stat +#endif +#ifdef lseek +#undef lseek +#endif +#ifdef popen +#undef popen +#endif +#ifdef pclose +#undef pclose +#endif +#define stat(x, y) mg_stat((x), (y)) +#define fopen(x, y) mg_fopen((x), (y)) +#define open(x, y) mg_open((x), (y)) +#define lseek(x, y, z) _lseeki64((x), (y), (z)) +#define popen(x, y) _popen((x), (y)) +#define pclose(x) _pclose(x) +#define mkdir(x, y) _mkdir(x) +#ifndef __func__ +#define STRX(x) #x +#define STR(x) STRX(x) +#define __func__ __FILE__ ":" STR(__LINE__) +#endif +#define INT64_FMT "I64d" +#define stat(x, y) mg_stat((x), (y)) +#define fopen(x, y) mg_fopen((x), (y)) +#define open(x, y) mg_open((x), (y)) +#define flockfile(x) ((void) (x)) +#define funlockfile(x) ((void) (x)) +typedef struct _stati64 file_stat_t; +typedef HANDLE process_id_t; +#else ////////////// UNIX specific defines and includes +#include <dirent.h> +#include <dlfcn.h> +#include <inttypes.h> +#include <pwd.h> +#define O_BINARY 0 +#define INT64_FMT PRId64 +typedef struct stat file_stat_t; +typedef pid_t process_id_t; +#endif //////// End of platform-specific defines and includes - return p; -} +#include "mongoose.h" -static char * mg_strdup(const char *str) { - return mg_strndup(str, strlen(str)); -} +#define MAX_REQUEST_SIZE 16384 +#define IOBUF_SIZE 8192 +#define MAX_PATH_SIZE 8192 +#define DEFAULT_CGI_PATTERN "**.cgi$|**.pl$|**.php$" +#define CGI_ENVIRONMENT_SIZE 8192 +#define MAX_CGI_ENVIR_VARS 64 +#define ENV_EXPORT_TO_CGI "MONGOOSE_CGI" +#define PASSWORDS_FILE_NAME ".htpasswd" -static const char *mg_strcasestr(const char *big_str, const char *small_str) { - int i, big_len = strlen(big_str), small_len = strlen(small_str); +#ifndef MONGOOSE_USE_WEBSOCKET_PING_INTERVAL +#define MONGOOSE_USE_WEBSOCKET_PING_INTERVAL 5 +#endif - for (i = 0; i <= big_len - small_len; i++) { - if (mg_strncasecmp(big_str + i, small_str, small_len) == 0) { - return big_str + i; - } - } +// Extra HTTP headers to send in every static file reply +#if !defined(MONGOOSE_USE_EXTRA_HTTP_HEADERS) +#define MONGOOSE_USE_EXTRA_HTTP_HEADERS "" +#endif - return NULL; -} +#ifndef MONGOOSE_POST_SIZE_LIMIT +#define MONGOOSE_POST_SIZE_LIMIT 0 +#endif -// Like snprintf(), but never returns negative value, or a value -// that is larger than a supplied buffer. -// Thanks to Adam Zeldis to pointing snprintf()-caused vulnerability -// in his audit report. -static int mg_vsnprintf(struct mg_connection *conn, char *buf, size_t buflen, - const char *fmt, va_list ap) { - int n; +#ifndef MONGOOSE_IDLE_TIMEOUT_SECONDS +#define MONGOOSE_IDLE_TIMEOUT_SECONDS 30 +#endif - if (buflen == 0) - return 0; +#ifdef MONGOOSE_NO_SOCKETPAIR +#define MONGOOSE_NO_CGI +#endif - n = vsnprintf(buf, buflen, fmt, ap); +#ifdef MONGOOSE_NO_FILESYSTEM +#define MONGOOSE_NO_AUTH +#define MONGOOSE_NO_CGI +#define MONGOOSE_NO_DAV +#define MONGOOSE_NO_DIRECTORY_LISTING +#define MONGOOSE_NO_LOGGING +#define MONGOOSE_NO_SSI +#define MONGOOSE_NO_DL +#endif - if (n < 0) { - cry(conn, "vsnprintf error"); - n = 0; - } else if (n >= (int) buflen) { - cry(conn, "truncating vsnprintf buffer: [%.*s]", - n > 200 ? 200 : n, buf); - n = (int) buflen - 1; - } - buf[n] = '\0'; +struct vec { + const char *ptr; + int len; +}; - return n; -} +// For directory listing and WevDAV support +struct dir_entry { + struct connection *conn; + char *file_name; + file_stat_t st; +}; + +// NOTE(lsm): this enum shoulds be in sync with the config_options. +enum { + ACCESS_CONTROL_LIST, +#ifndef MONGOOSE_NO_FILESYSTEM + ACCESS_LOG_FILE, +#ifndef MONGOOSE_NO_AUTH + AUTH_DOMAIN, +#endif +#ifndef MONGOOSE_NO_CGI + CGI_INTERPRETER, + CGI_PATTERN, +#endif + DAV_AUTH_FILE, + DOCUMENT_ROOT, +#ifndef MONGOOSE_NO_DIRECTORY_LISTING + ENABLE_DIRECTORY_LISTING, +#endif +#endif + EXTRA_MIME_TYPES, +#if !defined(MONGOOSE_NO_FILESYSTEM) && !defined(MONGOOSE_NO_AUTH) + GLOBAL_AUTH_FILE, +#endif +#ifndef MONGOOSE_NO_FILESYSTEM + HIDE_FILES_PATTERN, + HEXDUMP_FILE, + INDEX_FILES, +#endif + LISTENING_PORT, +#ifndef _WIN32 + RUN_AS_USER, +#endif +#ifndef MONGOOSE_NO_SSI + SSI_PATTERN, +#endif +#ifdef NS_ENABLE_SSL + SSL_CERTIFICATE, + SSL_CA_CERTIFICATE, + SSL_MITM_CERTS, +#endif + URL_REWRITES, + NUM_OPTIONS +}; -static int mg_snprintf(struct mg_connection *conn, char *buf, size_t buflen, - PRINTF_FORMAT_STRING(const char *fmt), ...) - PRINTF_ARGS(4, 5); +static const char *static_config_options[] = { + "access_control_list", NULL, +#ifndef MONGOOSE_NO_FILESYSTEM + "access_log_file", NULL, +#ifndef MONGOOSE_NO_AUTH + "auth_domain", "mydomain.com", +#endif +#ifndef MONGOOSE_NO_CGI + "cgi_interpreter", NULL, + "cgi_pattern", DEFAULT_CGI_PATTERN, +#endif + "dav_auth_file", NULL, + "document_root", NULL, +#ifndef MONGOOSE_NO_DIRECTORY_LISTING + "enable_directory_listing", "yes", +#endif +#endif + "extra_mime_types", NULL, +#if !defined(MONGOOSE_NO_FILESYSTEM) && !defined(MONGOOSE_NO_AUTH) + "global_auth_file", NULL, +#endif +#ifndef MONGOOSE_NO_FILESYSTEM + "hide_files_patterns", NULL, + "hexdump_file", NULL, + "index_files","index.html,index.htm,index.shtml,index.cgi,index.php,index.lp", +#endif + "listening_port", NULL, +#ifndef _WIN32 + "run_as_user", NULL, +#endif +#ifndef MONGOOSE_NO_SSI + "ssi_pattern", "**.shtml$|**.shtm$", +#endif +#ifdef NS_ENABLE_SSL + "ssl_certificate", NULL, + "ssl_ca_certificate", NULL, + "ssl_mitm_certs", NULL, +#endif + "url_rewrites", NULL, + NULL +}; -static int mg_snprintf(struct mg_connection *conn, char *buf, size_t buflen, - const char *fmt, ...) { - va_list ap; - int n; +struct mg_server { + struct ns_server ns_server; + union socket_address lsa; // Listening socket address + mg_handler_t event_handler; + char *config_options[NUM_OPTIONS]; +}; - va_start(ap, fmt); - n = mg_vsnprintf(conn, buf, buflen, fmt, ap); - va_end(ap); +// Local endpoint representation +union endpoint { + int fd; // Opened regular local file + struct ns_connection *nc; // CGI or proxy->target connection +}; - return n; -} +enum endpoint_type { + EP_NONE, EP_FILE, EP_CGI, EP_USER, EP_PUT, EP_CLIENT, EP_PROXY +}; -// Skip the characters until one of the delimiters characters found. -// 0-terminate resulting word. Skip the delimiter and following whitespaces. -// Advance pointer to buffer to the next word. Return found 0-terminated word. -// Delimiters can be quoted with quotechar. -static char *skip_quoted(char **buf, const char *delimiters, - const char *whitespace, char quotechar) { - char *p, *begin_word, *end_word, *end_whitespace; - - begin_word = *buf; - end_word = begin_word + strcspn(begin_word, delimiters); - - // Check for quotechar - if (end_word > begin_word) { - p = end_word - 1; - while (*p == quotechar) { - // If there is anything beyond end_word, copy it - if (*end_word == '\0') { - *p = '\0'; - break; - } else { - size_t end_off = strcspn(end_word + 1, delimiters); - memmove (p, end_word, end_off + 1); - p += end_off; // p must correspond to end_word - 1 - end_word += end_off + 1; - } - } - for (p++; p < end_word; p++) { - *p = '\0'; - } - } - - if (*end_word == '\0') { - *buf = end_word; - } else { - end_whitespace = end_word + 1 + strspn(end_word + 1, whitespace); - - for (p = end_word; p < end_whitespace; p++) { - *p = '\0'; - } - - *buf = end_whitespace; - } - - return begin_word; -} - -// Simplified version of skip_quoted without quote char -// and whitespace == delimiters -static char *skip(char **buf, const char *delimiters) { - return skip_quoted(buf, delimiters, delimiters, 0); +#define MG_HEADERS_SENT NSF_USER_1 +#define MG_LONG_RUNNING NSF_USER_2 +#define MG_CGI_CONN NSF_USER_3 +#define MG_PROXY_CONN NSF_USER_4 + +struct connection { + struct ns_connection *ns_conn; // NOTE(lsm): main.c depends on this order + struct mg_connection mg_conn; + struct mg_server *server; + union endpoint endpoint; + enum endpoint_type endpoint_type; + char *path_info; + char *request; + int64_t num_bytes_sent; // Total number of bytes sent + int64_t cl; // Reply content length, for Range support + int request_len; // Request length, including last \r\n after last header +}; + +#define MG_CONN_2_CONN(c) ((struct connection *) ((char *) (c) - \ + offsetof(struct connection, mg_conn))) + +static void open_local_endpoint(struct connection *conn, int skip_user); +static void close_local_endpoint(struct connection *conn); + +static const struct { + const char *extension; + size_t ext_len; + const char *mime_type; +} static_builtin_mime_types[] = { + {".html", 5, "text/html"}, + {".htm", 4, "text/html"}, + {".shtm", 5, "text/html"}, + {".shtml", 6, "text/html"}, + {".css", 4, "text/css"}, + {".js", 3, "application/x-javascript"}, + {".ico", 4, "image/x-icon"}, + {".gif", 4, "image/gif"}, + {".jpg", 4, "image/jpeg"}, + {".jpeg", 5, "image/jpeg"}, + {".png", 4, "image/png"}, + {".svg", 4, "image/svg+xml"}, + {".txt", 4, "text/plain"}, + {".torrent", 8, "application/x-bittorrent"}, + {".wav", 4, "audio/x-wav"}, + {".mp3", 4, "audio/x-mp3"}, + {".mid", 4, "audio/mid"}, + {".m3u", 4, "audio/x-mpegurl"}, + {".ogg", 4, "application/ogg"}, + {".ram", 4, "audio/x-pn-realaudio"}, + {".xml", 4, "text/xml"}, + {".json", 5, "text/json"}, + {".xslt", 5, "application/xml"}, + {".xsl", 4, "application/xml"}, + {".ra", 3, "audio/x-pn-realaudio"}, + {".doc", 4, "application/msword"}, + {".exe", 4, "application/octet-stream"}, + {".zip", 4, "application/x-zip-compressed"}, + {".xls", 4, "application/excel"}, + {".tgz", 4, "application/x-tar-gz"}, + {".tar", 4, "application/x-tar"}, + {".gz", 3, "application/x-gunzip"}, + {".arj", 4, "application/x-arj-compressed"}, + {".rar", 4, "application/x-rar-compressed"}, + {".rtf", 4, "application/rtf"}, + {".pdf", 4, "application/pdf"}, + {".swf", 4, "application/x-shockwave-flash"}, + {".mpg", 4, "video/mpeg"}, + {".webm", 5, "video/webm"}, + {".mpeg", 5, "video/mpeg"}, + {".mov", 4, "video/quicktime"}, + {".mp4", 4, "video/mp4"}, + {".m4v", 4, "video/x-m4v"}, + {".asf", 4, "video/x-ms-asf"}, + {".avi", 4, "video/x-msvideo"}, + {".bmp", 4, "image/bmp"}, + {".ttf", 4, "application/x-font-ttf"}, + {NULL, 0, NULL} +}; + +#ifndef MONGOOSE_NO_THREADS +void *mg_start_thread(void *(*f)(void *), void *p) { + return ns_start_thread(f, p); } +#endif // MONGOOSE_NO_THREADS +#if defined(_WIN32) && !defined(MONGOOSE_NO_FILESYSTEM) +// Encode 'path' which is assumed UTF-8 string, into UNICODE string. +// wbuf and wbuf_len is a target buffer and its length. +static void to_wchar(const char *path, wchar_t *wbuf, size_t wbuf_len) { + char buf[MAX_PATH_SIZE * 2], buf2[MAX_PATH_SIZE * 2], *p; -// Return HTTP header value, or NULL if not found. -static const char *get_header(const struct mg_request_info *ri, - const char *name) { - int i; + strncpy(buf, path, sizeof(buf)); + buf[sizeof(buf) - 1] = '\0'; - for (i = 0; i < ri->num_headers; i++) - if (!mg_strcasecmp(name, ri->http_headers[i].name)) - return ri->http_headers[i].value; + // Trim trailing slashes. Leave backslash for paths like "X:\" + p = buf + strlen(buf) - 1; + while (p > buf && p[-1] != ':' && (p[0] == '\\' || p[0] == '/')) *p-- = '\0'; + + // Convert to Unicode and back. If doubly-converted string does not + // match the original, something is fishy, reject. + memset(wbuf, 0, wbuf_len * sizeof(wchar_t)); + MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, (int) wbuf_len); + WideCharToMultiByte(CP_UTF8, 0, wbuf, (int) wbuf_len, buf2, sizeof(buf2), + NULL, NULL); + if (strcmp(buf, buf2) != 0) { + wbuf[0] = L'\0'; + } +} - return NULL; +static int mg_stat(const char *path, file_stat_t *st) { + wchar_t wpath[MAX_PATH_SIZE]; + to_wchar(path, wpath, ARRAY_SIZE(wpath)); + DBG(("[%ls] -> %d", wpath, _wstati64(wpath, st))); + return _wstati64(wpath, st); } -const char *mg_get_header(const struct mg_connection *conn, const char *name) { - return get_header(&conn->request_info, name); +static FILE *mg_fopen(const char *path, const char *mode) { + wchar_t wpath[MAX_PATH_SIZE], wmode[10]; + to_wchar(path, wpath, ARRAY_SIZE(wpath)); + to_wchar(mode, wmode, ARRAY_SIZE(wmode)); + return _wfopen(wpath, wmode); } +static int mg_open(const char *path, int flag) { + wchar_t wpath[MAX_PATH_SIZE]; + to_wchar(path, wpath, ARRAY_SIZE(wpath)); + return _wopen(wpath, flag); +} +#endif // _WIN32 && !MONGOOSE_NO_FILESYSTEM + // A helper function for traversing a comma separated list of values. // It returns a list pointer shifted to the next value, or NULL if the end // of the list found. @@ -865,1218 +1402,2109 @@ const char *mg_get_header(const struct mg_connection *conn, const char *name) { // vector is initialized to point to the "y" part, and val vector length // is adjusted to point only to "x". static const char *next_option(const char *list, struct vec *val, - struct vec *eq_val) { - if (list == NULL || *list == '\0') { - // End of the list - list = NULL; - } else { - val->ptr = list; - if ((list = strchr(val->ptr, ',')) != NULL) { - // Comma found. Store length and shift the list ptr - val->len = list - val->ptr; - list++; - } else { - // This value is the last one - list = val->ptr + strlen(val->ptr); - val->len = list - val->ptr; - } - - if (eq_val != NULL) { - // Value has form "x=y", adjust pointers and lengths - // so that val points to "x", and eq_val points to "y". - eq_val->len = 0; - eq_val->ptr = (const char *) memchr(val->ptr, '=', val->len); - if (eq_val->ptr != NULL) { - eq_val->ptr++; // Skip over '=' character - eq_val->len = val->ptr + val->len - eq_val->ptr; - val->len = (eq_val->ptr - val->ptr) - 1; - } - } - } - - return list; -} - -static int match_prefix(const char *pattern, int pattern_len, const char *str) { - const char *or_str; - int i, j, len, res; - - if ((or_str = (const char *) memchr(pattern, '|', pattern_len)) != NULL) { - res = match_prefix(pattern, or_str - pattern, str); - return res > 0 ? res : - match_prefix(or_str + 1, (pattern + pattern_len) - (or_str + 1), str); - } - - i = j = 0; - res = -1; - for (; i < pattern_len; i++, j++) { - if (pattern[i] == '?' && str[j] != '\0') { - continue; - } else if (pattern[i] == '$') { - return str[j] == '\0' ? j : -1; - } else if (pattern[i] == '*') { - i++; - if (pattern[i] == '*') { - i++; - len = (int) strlen(str + j); - } else { - len = (int) strcspn(str + j, "/"); - } - if (i == pattern_len) { - return j + len; - } - do { - res = match_prefix(pattern + i, pattern_len - i, str + j + len); - } while (res == -1 && len-- > 0); - return res == -1 ? -1 : j + res + len; - } else if (pattern[i] != str[j]) { - return -1; - } - } - return j; -} - -// HTTP 1.1 assumes keep alive if "Connection:" header is not set -// This function must tolerate situations when connection info is not -// set up, for example if request parsing failed. -static int should_keep_alive(const struct mg_connection *conn) { - const char *http_version = conn->request_info.http_version; - const char *header = mg_get_header(conn, "Connection"); - if (conn->must_close || - conn->status_code == 401 || - mg_strcasecmp(conn->ctx->config[ENABLE_KEEP_ALIVE], "yes") != 0 || - (header != NULL && mg_strcasecmp(header, "keep-alive") != 0) || - (header == NULL && http_version && strcmp(http_version, "1.1"))) { - return 0; - } - return 1; + struct vec *eq_val) { + if (list == NULL || *list == '\0') { + // End of the list + list = NULL; + } else { + val->ptr = list; + if ((list = strchr(val->ptr, ',')) != NULL) { + // Comma found. Store length and shift the list ptr + val->len = list - val->ptr; + list++; + } else { + // This value is the last one + list = val->ptr + strlen(val->ptr); + val->len = list - val->ptr; + } + + if (eq_val != NULL) { + // Value has form "x=y", adjust pointers and lengths + // so that val points to "x", and eq_val points to "y". + eq_val->len = 0; + eq_val->ptr = (const char *) memchr(val->ptr, '=', val->len); + if (eq_val->ptr != NULL) { + eq_val->ptr++; // Skip over '=' character + eq_val->len = val->ptr + val->len - eq_val->ptr; + val->len = (eq_val->ptr - val->ptr) - 1; + } + } + } + + return list; } -static const char *suggest_connection_header(const struct mg_connection *conn) { - return should_keep_alive(conn) ? "keep-alive" : "close"; +// Like snprintf(), but never returns negative value, or a value +// that is larger than a supplied buffer. +static int mg_vsnprintf(char *buf, size_t buflen, const char *fmt, va_list ap) { + int n; + if (buflen < 1) return 0; + n = vsnprintf(buf, buflen, fmt, ap); + if (n < 0) { + n = 0; + } else if (n >= (int) buflen) { + n = (int) buflen - 1; + } + buf[n] = '\0'; + return n; +} + +static int mg_snprintf(char *buf, size_t buflen, const char *fmt, ...) { + va_list ap; + int n; + va_start(ap, fmt); + n = mg_vsnprintf(buf, buflen, fmt, ap); + va_end(ap); + return n; } -static void send_http_error(struct mg_connection *, int, const char *, - PRINTF_FORMAT_STRING(const char *fmt), ...) - PRINTF_ARGS(4, 5); - +// Check whether full request is buffered. Return: +// -1 if request is malformed +// 0 if request is not yet fully buffered +// >0 actual request length, including last \r\n\r\n +static int get_request_len(const char *s, int buf_len) { + const unsigned char *buf = (unsigned char *) s; + int i; + + for (i = 0; i < buf_len; i++) { + // Control characters are not allowed but >=128 are. + // Abort scan as soon as one malformed character is found. + if (!isprint(buf[i]) && buf[i] != '\r' && buf[i] != '\n' && buf[i] < 128) { + return -1; + } else if (buf[i] == '\n' && i + 1 < buf_len && buf[i + 1] == '\n') { + return i + 2; + } else if (buf[i] == '\n' && i + 2 < buf_len && buf[i + 1] == '\r' && + buf[i + 2] == '\n') { + return i + 3; + } + } + + return 0; +} -static void send_http_error(struct mg_connection *conn, int status, - const char *reason, const char *fmt, ...) { - char buf[MG_BUF_LEN]; - va_list ap; - int len = 0; +// Skip the characters until one of the delimiters characters found. +// 0-terminate resulting word. Skip the rest of the delimiters if any. +// Advance pointer to buffer to the next word. Return found 0-terminated word. +static char *skip(char **buf, const char *delimiters) { + char *p, *begin_word, *end_word, *end_delimiters; - conn->status_code = status; - if (conn->ctx->callbacks.http_error == NULL || - conn->ctx->callbacks.http_error(conn, status)) { - buf[0] = '\0'; + begin_word = *buf; + end_word = begin_word + strcspn(begin_word, delimiters); + end_delimiters = end_word + strspn(end_word, delimiters); - // Errors 1xx, 204 and 304 MUST NOT send a body - if (status > 199 && status != 204 && status != 304) { - len = mg_snprintf(conn, buf, sizeof(buf), "Error %d: %s", status, reason); - buf[len++] = '\n'; + for (p = end_word; p < end_delimiters; p++) { + *p = '\0'; + } - va_start(ap, fmt); - len += mg_vsnprintf(conn, buf + len, sizeof(buf) - len, fmt, ap); - va_end(ap); - } - DEBUG_TRACE(("[%s]", buf)); + *buf = end_delimiters; - mg_printf(conn, "HTTP/1.1 %d %s\r\n" - "Content-Length: %d\r\n" - "Connection: %s\r\n\r\n", status, reason, len, - suggest_connection_header(conn)); - conn->num_bytes_sent += mg_printf(conn, "%s", buf); - } + return begin_word; } -#if defined(_WIN32) && !defined(__SYMBIAN32__) -static int pthread_mutex_init(pthread_mutex_t *mutex, void *unused) { - (void) unused; - *mutex = CreateMutex(NULL, FALSE, NULL); - return *mutex == NULL ? -1 : 0; +// Parse HTTP headers from the given buffer, advance buffer to the point +// where parsing stopped. +static void parse_http_headers(char **buf, struct mg_connection *ri) { + size_t i; + + for (i = 0; i < ARRAY_SIZE(ri->http_headers); i++) { + ri->http_headers[i].name = skip(buf, ": "); + ri->http_headers[i].value = skip(buf, "\r\n"); + if (ri->http_headers[i].name[0] == '\0') + break; + ri->num_headers = i + 1; + } +} + +static const char *status_code_to_str(int status_code) { + switch (status_code) { + case 200: return "OK"; + case 201: return "Created"; + case 204: return "No Content"; + case 301: return "Moved Permanently"; + case 302: return "Found"; + case 304: return "Not Modified"; + case 400: return "Bad Request"; + case 403: return "Forbidden"; + case 404: return "Not Found"; + case 405: return "Method Not Allowed"; + case 409: return "Conflict"; + case 411: return "Length Required"; + case 413: return "Request Entity Too Large"; + case 415: return "Unsupported Media Type"; + case 423: return "Locked"; + case 500: return "Server Error"; + case 501: return "Not Implemented"; + default: return "Server Error"; + } +} + +static int call_user(struct connection *conn, enum mg_event ev) { + return conn != NULL && conn->server != NULL && + conn->server->event_handler != NULL ? + conn->server->event_handler(&conn->mg_conn, ev) : MG_FALSE; +} + +static void send_http_error(struct connection *conn, int code, + const char *fmt, ...) { + const char *message = status_code_to_str(code); + const char *rewrites = conn->server->config_options[URL_REWRITES]; + char headers[200], body[200]; + struct vec a, b; + va_list ap; + int body_len, headers_len, match_code; + + conn->mg_conn.status_code = code; + + // Invoke error handler if it is set + if (call_user(conn, MG_HTTP_ERROR) == MG_TRUE) { + close_local_endpoint(conn); + return; + } + + // Handle error code rewrites + while ((rewrites = next_option(rewrites, &a, &b)) != NULL) { + if ((match_code = atoi(a.ptr)) > 0 && match_code == code) { + struct mg_connection *c = &conn->mg_conn; + c->status_code = 302; + mg_printf(c, "HTTP/1.1 %d Moved\r\n" + "Location: %.*s?code=%d&orig_uri=%s&query_string=%s\r\n\r\n", + c->status_code, b.len, b.ptr, code, c->uri, + c->query_string == NULL ? "" : c->query_string); + close_local_endpoint(conn); + return; + } + } + + body_len = mg_snprintf(body, sizeof(body), "%d %s\n", code, message); + if (fmt != NULL) { + va_start(ap, fmt); + body_len += mg_vsnprintf(body + body_len, sizeof(body) - body_len, fmt, ap); + va_end(ap); + } + if ((code >= 300 && code <= 399) || code == 204) { + // 3xx errors do not have body + body_len = 0; + } + headers_len = mg_snprintf(headers, sizeof(headers), + "HTTP/1.1 %d %s\r\nContent-Length: %d\r\n" + "Content-Type: text/plain\r\n\r\n", + code, message, body_len); + ns_send(conn->ns_conn, headers, headers_len); + ns_send(conn->ns_conn, body, body_len); + close_local_endpoint(conn); // This will write to the log file +} + +static void write_chunk(struct connection *conn, const char *buf, int len) { + char chunk_size[50]; + int n = mg_snprintf(chunk_size, sizeof(chunk_size), "%X\r\n", len); + ns_send(conn->ns_conn, chunk_size, n); + ns_send(conn->ns_conn, buf, len); + ns_send(conn->ns_conn, "\r\n", 2); } -static int pthread_mutex_destroy(pthread_mutex_t *mutex) { - return CloseHandle(*mutex) == 0 ? -1 : 0; -} +int mg_printf(struct mg_connection *conn, const char *fmt, ...) { + struct connection *c = MG_CONN_2_CONN(conn); + int len; + va_list ap; -static int pthread_mutex_lock(pthread_mutex_t *mutex) { - return WaitForSingleObject(*mutex, INFINITE) == WAIT_OBJECT_0? 0 : -1; -} + va_start(ap, fmt); + len = ns_vprintf(c->ns_conn, fmt, ap); + va_end(ap); -static int pthread_mutex_unlock(pthread_mutex_t *mutex) { - return ReleaseMutex(*mutex) == 0 ? -1 : 0; + return len; } -static int pthread_cond_init(pthread_cond_t *cv, const void *unused) { - (void) unused; - cv->signal = CreateEvent(NULL, FALSE, FALSE, NULL); - cv->broadcast = CreateEvent(NULL, TRUE, FALSE, NULL); - return cv->signal != NULL && cv->broadcast != NULL ? 0 : -1; +static void ns_forward(struct ns_connection *from, struct ns_connection *to) { + DBG(("%p -> %p %zu bytes", from, to, from->recv_iobuf.len)); + ns_send(to, from->recv_iobuf.buf, from->recv_iobuf.len); + iobuf_remove(&from->recv_iobuf, from->recv_iobuf.len); } -static int pthread_cond_wait(pthread_cond_t *cv, pthread_mutex_t *mutex) { - HANDLE handles[] = {cv->signal, cv->broadcast}; - ReleaseMutex(*mutex); - WaitForMultipleObjects(2, handles, FALSE, INFINITE); - return WaitForSingleObject(*mutex, INFINITE) == WAIT_OBJECT_0? 0 : -1; -} +#ifndef MONGOOSE_NO_CGI +#ifdef _WIN32 +struct threadparam { + sock_t s; + HANDLE hPipe; +}; -static int pthread_cond_signal(pthread_cond_t *cv) { - return SetEvent(cv->signal) == 0 ? -1 : 0; +static int wait_until_ready(sock_t sock, int for_read) { + fd_set set; + FD_ZERO(&set); + FD_SET(sock, &set); + select(sock + 1, for_read ? &set : 0, for_read ? 0 : &set, 0, 0); + return 1; +} + +static void *push_to_stdin(void *arg) { + struct threadparam *tp = (struct threadparam *)arg; + int n, sent, stop = 0; + DWORD k; + char buf[IOBUF_SIZE]; + + while (!stop && wait_until_ready(tp->s, 1) && + (n = recv(tp->s, buf, sizeof(buf), 0)) > 0) { + if (n == -1 && GetLastError() == WSAEWOULDBLOCK) continue; + for (sent = 0; !stop && sent < n; sent += k) { + if (!WriteFile(tp->hPipe, buf + sent, n - sent, &k, 0)) stop = 1; + } + } + DBG(("%s", "FORWARED EVERYTHING TO CGI")); + CloseHandle(tp->hPipe); + free(tp); + _endthread(); + return NULL; +} + +static void *pull_from_stdout(void *arg) { + struct threadparam *tp = (struct threadparam *)arg; + int k, stop = 0; + DWORD n, sent; + char buf[IOBUF_SIZE]; + + while (!stop && ReadFile(tp->hPipe, buf, sizeof(buf), &n, NULL)) { + for (sent = 0; !stop && sent < n; sent += k) { + if (wait_until_ready(tp->s, 0) && + (k = send(tp->s, buf + sent, n - sent, 0)) <= 0) stop = 1; + } + } + DBG(("%s", "EOF FROM CGI")); + CloseHandle(tp->hPipe); + shutdown(tp->s, 2); // Without this, IO thread may get truncated data + closesocket(tp->s); + free(tp); + _endthread(); + return NULL; +} + +static void spawn_stdio_thread(sock_t sock, HANDLE hPipe, + void *(*func)(void *)) { + struct threadparam *tp = (struct threadparam *)malloc(sizeof(*tp)); + if (tp != NULL) { + tp->s = sock; + tp->hPipe = hPipe; + mg_start_thread(func, tp); + } +} + +static void abs_path(const char *utf8_path, char *abs_path, size_t len) { + wchar_t buf[MAX_PATH_SIZE], buf2[MAX_PATH_SIZE]; + to_wchar(utf8_path, buf, ARRAY_SIZE(buf)); + GetFullPathNameW(buf, ARRAY_SIZE(buf2), buf2, NULL); + WideCharToMultiByte(CP_UTF8, 0, buf2, wcslen(buf2) + 1, abs_path, len, 0, 0); +} + +static process_id_t start_process(char *interp, const char *cmd, + const char *env, const char *envp[], + const char *dir, sock_t sock) { + STARTUPINFOW si = {0}; + PROCESS_INFORMATION pi = {0}; + HANDLE a[2], b[2], me = GetCurrentProcess(); + wchar_t wcmd[MAX_PATH_SIZE], full_dir[MAX_PATH_SIZE]; + char buf[MAX_PATH_SIZE], buf4[MAX_PATH_SIZE], buf5[MAX_PATH_SIZE], + cmdline[MAX_PATH_SIZE], *p; + DWORD flags = DUPLICATE_CLOSE_SOURCE | DUPLICATE_SAME_ACCESS; + FILE *fp; + + si.cb = sizeof(si); + si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW; + si.wShowWindow = SW_HIDE; + si.hStdError = GetStdHandle(STD_ERROR_HANDLE); + + CreatePipe(&a[0], &a[1], NULL, 0); + CreatePipe(&b[0], &b[1], NULL, 0); + DuplicateHandle(me, a[0], me, &si.hStdInput, 0, TRUE, flags); + DuplicateHandle(me, b[1], me, &si.hStdOutput, 0, TRUE, flags); + + if (interp == NULL && (fp = fopen(cmd, "r")) != NULL) { + buf[0] = buf[1] = '\0'; + fgets(buf, sizeof(buf), fp); + buf[sizeof(buf) - 1] = '\0'; + if (buf[0] == '#' && buf[1] == '!') { + interp = buf + 2; + for (p = interp + strlen(interp); + isspace(* (uint8_t *) p) && p > interp; p--) *p = '\0'; + } + fclose(fp); + } + + if (interp != NULL) { + abs_path(interp, buf4, ARRAY_SIZE(buf4)); + interp = buf4; + } + abs_path(dir, buf5, ARRAY_SIZE(buf5)); + to_wchar(dir, full_dir, ARRAY_SIZE(full_dir)); + mg_snprintf(cmdline, sizeof(cmdline), "%s%s\"%s\"", + interp ? interp : "", interp ? " " : "", cmd); + to_wchar(cmdline, wcmd, ARRAY_SIZE(wcmd)); + + if (CreateProcessW(NULL, wcmd, NULL, NULL, TRUE, CREATE_NEW_PROCESS_GROUP, + (void *) env, full_dir, &si, &pi) != 0) { + spawn_stdio_thread(sock, a[1], push_to_stdin); + spawn_stdio_thread(sock, b[0], pull_from_stdout); + } else { + CloseHandle(a[1]); + CloseHandle(b[0]); + closesocket(sock); + } + DBG(("CGI command: [%ls] -> %p", wcmd, pi.hProcess)); + + CloseHandle(si.hStdOutput); + CloseHandle(si.hStdInput); + CloseHandle(a[0]); + CloseHandle(b[1]); + CloseHandle(pi.hThread); + CloseHandle(pi.hProcess); + + return pi.hProcess; } +#else +static process_id_t start_process(const char *interp, const char *cmd, + const char *env, const char *envp[], + const char *dir, sock_t sock) { + char buf[500]; + process_id_t pid = fork(); + (void) env; + + if (pid == 0) { + (void) chdir(dir); + (void) dup2(sock, 0); + (void) dup2(sock, 1); + closesocket(sock); + + // After exec, all signal handlers are restored to their default values, + // with one exception of SIGCHLD. According to POSIX.1-2001 and Linux's + // implementation, SIGCHLD's handler will leave unchanged after exec + // if it was set to be ignored. Restore it to default action. + signal(SIGCHLD, SIG_DFL); + + if (interp == NULL) { + execle(cmd, cmd, NULL, envp); + } else { + execle(interp, interp, cmd, NULL, envp); + } + snprintf(buf, sizeof(buf), "Status: 500\r\n\r\n" + "500 Server Error: %s%s%s: %s", interp == NULL ? "" : interp, + interp == NULL ? "" : " ", cmd, strerror(errno)); + send(1, buf, strlen(buf), 0); + exit(EXIT_FAILURE); // exec call failed + } + + return pid; +} +#endif // _WIN32 -static int pthread_cond_broadcast(pthread_cond_t *cv) { - // Implementation with PulseEvent() has race condition, see - // http://www.cs.wustl.edu/~schmidt/win32-cv-1.html - return PulseEvent(cv->broadcast) == 0 ? -1 : 0; -} +// This structure helps to create an environment for the spawned CGI program. +// Environment is an array of "VARIABLE=VALUE\0" ASCIIZ strings, +// last element must be NULL. +// However, on Windows there is a requirement that all these VARIABLE=VALUE\0 +// strings must reside in a contiguous buffer. The end of the buffer is +// marked by two '\0' characters. +// We satisfy both worlds: we create an envp array (which is vars), all +// entries are actually pointers inside buf. +struct cgi_env_block { + struct mg_connection *conn; + char buf[CGI_ENVIRONMENT_SIZE]; // Environment buffer + const char *vars[MAX_CGI_ENVIR_VARS]; // char *envp[] + int len; // Space taken + int nvars; // Number of variables in envp[] +}; + +// Append VARIABLE=VALUE\0 string to the buffer, and add a respective +// pointer into the vars array. +static char *addenv(struct cgi_env_block *block, const char *fmt, ...) { + int n, space; + char *added; + va_list ap; + + // Calculate how much space is left in the buffer + space = sizeof(block->buf) - block->len - 2; + assert(space >= 0); + + // Make a pointer to the free space int the buffer + added = block->buf + block->len; + + // Copy VARIABLE=VALUE\0 string into the free space + va_start(ap, fmt); + n = mg_vsnprintf(added, (size_t) space, fmt, ap); + va_end(ap); + + // Make sure we do not overflow buffer and the envp array + if (n > 0 && n + 1 < space && + block->nvars < (int) ARRAY_SIZE(block->vars) - 2) { + // Append a pointer to the added string into the envp array + block->vars[block->nvars++] = added; + // Bump up used length counter. Include \0 terminator + block->len += n + 1; + } + + return added; +} + +static void addenv2(struct cgi_env_block *blk, const char *name) { + const char *s; + if ((s = getenv(name)) != NULL) addenv(blk, "%s=%s", name, s); +} + +static void prepare_cgi_environment(struct connection *conn, + const char *prog, + struct cgi_env_block *blk) { + struct mg_connection *ri = &conn->mg_conn; + const char *s, *slash; + char *p, **opts = conn->server->config_options; + int i; + + blk->len = blk->nvars = 0; + blk->conn = ri; + + if ((s = getenv("SERVER_NAME")) != NULL) { + addenv(blk, "SERVER_NAME=%s", s); + } else { + addenv(blk, "SERVER_NAME=%s", ri->local_ip); + } + addenv(blk, "SERVER_ROOT=%s", opts[DOCUMENT_ROOT]); + addenv(blk, "DOCUMENT_ROOT=%s", opts[DOCUMENT_ROOT]); + addenv(blk, "SERVER_SOFTWARE=%s/%s", "Mongoose", MONGOOSE_VERSION); + + // Prepare the environment block + addenv(blk, "%s", "GATEWAY_INTERFACE=CGI/1.1"); + addenv(blk, "%s", "SERVER_PROTOCOL=HTTP/1.1"); + addenv(blk, "%s", "REDIRECT_STATUS=200"); // For PHP + + // TODO(lsm): fix this for IPv6 case + //addenv(blk, "SERVER_PORT=%d", ri->remote_port); + + addenv(blk, "REQUEST_METHOD=%s", ri->request_method); + addenv(blk, "REMOTE_ADDR=%s", ri->remote_ip); + addenv(blk, "REMOTE_PORT=%d", ri->remote_port); + addenv(blk, "REQUEST_URI=%s%s%s", ri->uri, + ri->query_string == NULL ? "" : "?", + ri->query_string == NULL ? "" : ri->query_string); + + // SCRIPT_NAME + if (conn->path_info != NULL) { + addenv(blk, "SCRIPT_NAME=%.*s", + (int) (strlen(ri->uri) - strlen(conn->path_info)), ri->uri); + addenv(blk, "PATH_INFO=%s", conn->path_info); + } else { + s = strrchr(prog, '/'); + slash = strrchr(ri->uri, '/'); + addenv(blk, "SCRIPT_NAME=%.*s%s", + slash == NULL ? 0 : (int) (slash - ri->uri), ri->uri, + s == NULL ? prog : s); + } + + addenv(blk, "SCRIPT_FILENAME=%s", prog); + addenv(blk, "PATH_TRANSLATED=%s", prog); + addenv(blk, "HTTPS=%s", conn->ns_conn->ssl != NULL ? "on" : "off"); + + if ((s = mg_get_header(ri, "Content-Type")) != NULL) + addenv(blk, "CONTENT_TYPE=%s", s); + + if (ri->query_string != NULL) + addenv(blk, "QUERY_STRING=%s", ri->query_string); + + if ((s = mg_get_header(ri, "Content-Length")) != NULL) + addenv(blk, "CONTENT_LENGTH=%s", s); + + addenv2(blk, "PATH"); + addenv2(blk, "TMP"); + addenv2(blk, "TEMP"); + addenv2(blk, "TMPDIR"); + addenv2(blk, "PERLLIB"); + addenv2(blk, ENV_EXPORT_TO_CGI); + +#if defined(_WIN32) + addenv2(blk, "COMSPEC"); + addenv2(blk, "SYSTEMROOT"); + addenv2(blk, "SystemDrive"); + addenv2(blk, "ProgramFiles"); + addenv2(blk, "ProgramFiles(x86)"); + addenv2(blk, "CommonProgramFiles(x86)"); +#else + addenv2(blk, "LD_LIBRARY_PATH"); +#endif // _WIN32 + + // Add all headers as HTTP_* variables + for (i = 0; i < ri->num_headers; i++) { + p = addenv(blk, "HTTP_%s=%s", + ri->http_headers[i].name, ri->http_headers[i].value); + + // Convert variable name into uppercase, and change - to _ + for (; *p != '=' && *p != '\0'; p++) { + if (*p == '-') + *p = '_'; + *p = (char) toupper(* (unsigned char *) p); + } + } + + blk->vars[blk->nvars++] = NULL; + blk->buf[blk->len++] = '\0'; + + assert(blk->nvars < (int) ARRAY_SIZE(blk->vars)); + assert(blk->len > 0); + assert(blk->len < (int) sizeof(blk->buf)); +} + +static const char cgi_status[] = "HTTP/1.1 200 OK\r\n"; + +static void open_cgi_endpoint(struct connection *conn, const char *prog) { + struct cgi_env_block blk; + char dir[MAX_PATH_SIZE]; + const char *p; + sock_t fds[2]; + + prepare_cgi_environment(conn, prog, &blk); + // CGI must be executed in its own directory. 'dir' must point to the + // directory containing executable program, 'p' must point to the + // executable program name relative to 'dir'. + if ((p = strrchr(prog, '/')) == NULL) { + mg_snprintf(dir, sizeof(dir), "%s", "."); + } else { + mg_snprintf(dir, sizeof(dir), "%.*s", (int) (p - prog), prog); + } + + // Try to create socketpair in a loop until success. ns_socketpair() + // can be interrupted by a signal and fail. + // TODO(lsm): use sigaction to restart interrupted syscall + do { + ns_socketpair(fds); + } while (fds[0] == INVALID_SOCKET); + + if (start_process(conn->server->config_options[CGI_INTERPRETER], + prog, blk.buf, blk.vars, dir, fds[1]) > 0) { + conn->endpoint_type = EP_CGI; + conn->endpoint.nc = ns_add_sock(&conn->server->ns_server, + fds[0], conn); + conn->endpoint.nc->flags |= MG_CGI_CONN; + ns_send(conn->ns_conn, cgi_status, sizeof(cgi_status) - 1); + conn->mg_conn.status_code = 200; + conn->ns_conn->flags |= NSF_BUFFER_BUT_DONT_SEND; + // Pass POST data to the CGI process + conn->endpoint.nc->send_iobuf = conn->ns_conn->recv_iobuf; + iobuf_init(&conn->ns_conn->recv_iobuf, 0); + } else { + closesocket(fds[0]); + send_http_error(conn, 500, "start_process(%s) failed", prog); + } -static int pthread_cond_destroy(pthread_cond_t *cv) { - return CloseHandle(cv->signal) && CloseHandle(cv->broadcast) ? 0 : -1; +#ifndef _WIN32 + closesocket(fds[1]); // On Windows, CGI stdio thread closes that socket +#endif } -// For Windows, change all slashes to backslashes in path names. -static void change_slashes_to_backslashes(char *path) { - int i; +static void on_cgi_data(struct ns_connection *nc) { + struct connection *conn = (struct connection *) nc->connection_data; + const char *status = "500"; + struct mg_connection c; + + if (!conn) return; + + // Copy CGI data from CGI socket to the client send buffer + ns_forward(nc, conn->ns_conn); + + // If reply has not been parsed yet, parse it + if (conn->ns_conn->flags & NSF_BUFFER_BUT_DONT_SEND) { + struct iobuf *io = &conn->ns_conn->send_iobuf; + int s_len = sizeof(cgi_status) - 1; + int len = get_request_len(io->buf + s_len, io->len - s_len); + char buf[MAX_REQUEST_SIZE], *s = buf; + + if (len == 0) return; + + if (len < 0 || len > (int) sizeof(buf)) { + len = io->len; + iobuf_remove(io, io->len); + send_http_error(conn, 500, "CGI program sent malformed headers: [%.*s]", + len, io->buf); + } else { + memset(&c, 0, sizeof(c)); + memcpy(buf, io->buf + s_len, len); + buf[len - 1] = '\0'; + parse_http_headers(&s, &c); + if (mg_get_header(&c, "Location") != NULL) { + status = "302"; + } else if ((status = (char *) mg_get_header(&c, "Status")) == NULL) { + status = "200"; + } + memcpy(io->buf + 9, status, 3); + conn->mg_conn.status_code = atoi(status); + } + conn->ns_conn->flags &= ~NSF_BUFFER_BUT_DONT_SEND; + } +} +#endif // !MONGOOSE_NO_CGI + +static char *mg_strdup(const char *str) { + char *copy = (char *) malloc(strlen(str) + 1); + if (copy != NULL) { + strcpy(copy, str); + } + return copy; +} - for (i = 0; path[i] != '\0'; i++) { - if (path[i] == '/') - path[i] = '\\'; - // i > 0 check is to preserve UNC paths, like \\server\file.txt - if (path[i] == '\\' && i > 0) - while (path[i + 1] == '\\' || path[i + 1] == '/') - (void) memmove(path + i + 1, - path + i + 2, strlen(path + i + 1)); - } +static int isbyte(int n) { + return n >= 0 && n <= 255; } -// Encode 'path' which is assumed UTF-8 string, into UNICODE string. -// wbuf and wbuf_len is a target buffer and its length. -static void to_unicode(const char *path, wchar_t *wbuf, size_t wbuf_len) { - char buf[PATH_MAX], buf2[PATH_MAX]; +static int parse_net(const char *spec, uint32_t *net, uint32_t *mask) { + int n, a, b, c, d, slash = 32, len = 0; - mg_strlcpy(buf, path, sizeof(buf)); - change_slashes_to_backslashes(buf); + if ((sscanf(spec, "%d.%d.%d.%d/%d%n", &a, &b, &c, &d, &slash, &n) == 5 || + sscanf(spec, "%d.%d.%d.%d%n", &a, &b, &c, &d, &n) == 4) && + isbyte(a) && isbyte(b) && isbyte(c) && isbyte(d) && + slash >= 0 && slash < 33) { + len = n; + *net = ((uint32_t)a << 24) | ((uint32_t)b << 16) | ((uint32_t)c << 8) | d; + *mask = slash ? 0xffffffffU << (32 - slash) : 0; + } - // Convert to Unicode and back. If doubly-converted string does not - // match the original, something is fishy, reject. - memset(wbuf, 0, wbuf_len * sizeof(wchar_t)); - MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, (int) wbuf_len); - WideCharToMultiByte(CP_UTF8, 0, wbuf, (int) wbuf_len, buf2, sizeof(buf2), - NULL, NULL); - if (strcmp(buf, buf2) != 0) { - wbuf[0] = L'\0'; - } + return len; } -#if defined(_WIN32_WCE) -static time_t time(time_t *ptime) { - time_t t; - SYSTEMTIME st; - FILETIME ft; +// Verify given socket address against the ACL. +// Return -1 if ACL is malformed, 0 if address is disallowed, 1 if allowed. +static int check_acl(const char *acl, uint32_t remote_ip) { + int allowed, flag; + uint32_t net, mask; + struct vec vec; + + // If any ACL is set, deny by default + allowed = acl == NULL ? '+' : '-'; - GetSystemTime(&st); - SystemTimeToFileTime(&st, &ft); - t = SYS2UNIX_TIME(ft.dwLowDateTime, ft.dwHighDateTime); + while ((acl = next_option(acl, &vec, NULL)) != NULL) { + flag = vec.ptr[0]; + if ((flag != '+' && flag != '-') || + parse_net(&vec.ptr[1], &net, &mask) == 0) { + return -1; + } - if (ptime != NULL) { - *ptime = t; - } + if (net == (remote_ip & mask)) { + allowed = flag; + } + } - return t; + return allowed == '+'; } -static struct tm *localtime(const time_t *ptime, struct tm *ptm) { - int64_t t = ((int64_t) *ptime) * RATE_DIFF + EPOCH_DIFF; - FILETIME ft, lft; - SYSTEMTIME st; - TIME_ZONE_INFORMATION tzinfo; +// Protect against directory disclosure attack by removing '..', +// excessive '/' and '\' characters +static void remove_double_dots_and_double_slashes(char *s) { + char *p = s; + + while (*s != '\0') { + *p++ = *s++; + if (s[-1] == '/' || s[-1] == '\\') { + // Skip all following slashes, backslashes and double-dots + while (s[0] != '\0') { + if (s[0] == '/' || s[0] == '\\') { s++; } + else if (s[0] == '.' && s[1] == '.') { s += 2; } + else { break; } + } + } + } + *p = '\0'; +} + +int mg_url_decode(const char *src, int src_len, char *dst, + int dst_len, int is_form_url_encoded) { + int i, j, a, b; +#define HEXTOI(x) (isdigit(x) ? x - '0' : x - 'W') - if (ptm == NULL) { - return NULL; - } + for (i = j = 0; i < src_len && j < dst_len - 1; i++, j++) { + if (src[i] == '%' && i < src_len - 2 && + isxdigit(* (const unsigned char *) (src + i + 1)) && + isxdigit(* (const unsigned char *) (src + i + 2))) { + a = tolower(* (const unsigned char *) (src + i + 1)); + b = tolower(* (const unsigned char *) (src + i + 2)); + dst[j] = (char) ((HEXTOI(a) << 4) | HEXTOI(b)); + i += 2; + } else if (is_form_url_encoded && src[i] == '+') { + dst[j] = ' '; + } else { + dst[j] = src[i]; + } + } - * (int64_t *) &ft = t; - FileTimeToLocalFileTime(&ft, &lft); - FileTimeToSystemTime(&lft, &st); - ptm->tm_year = st.wYear - 1900; - ptm->tm_mon = st.wMonth - 1; - ptm->tm_wday = st.wDayOfWeek; - ptm->tm_mday = st.wDay; - ptm->tm_hour = st.wHour; - ptm->tm_min = st.wMinute; - ptm->tm_sec = st.wSecond; - ptm->tm_yday = 0; // hope nobody uses this - ptm->tm_isdst = - GetTimeZoneInformation(&tzinfo) == TIME_ZONE_ID_DAYLIGHT ? 1 : 0; + dst[j] = '\0'; // Null-terminate the destination - return ptm; + return i >= src_len ? j : -1; } -static struct tm *gmtime(const time_t *ptime, struct tm *ptm) { - // FIXME(lsm): fix this. - return localtime(ptime, ptm); +static int is_valid_http_method(const char *s) { + return !strcmp(s, "GET") || !strcmp(s, "POST") || !strcmp(s, "HEAD") || + !strcmp(s, "CONNECT") || !strcmp(s, "PUT") || !strcmp(s, "DELETE") || + !strcmp(s, "OPTIONS") || !strcmp(s, "PROPFIND") || !strcmp(s, "MKCOL"); } -static size_t strftime(char *dst, size_t dst_size, const char *fmt, - const struct tm *tm) { - (void) snprintf(dst, dst_size, "implement strftime() for WinCE"); - return 0; +// Parse HTTP request, fill in mg_request structure. +// This function modifies the buffer by NUL-terminating +// HTTP request components, header names and header values. +// Note that len must point to the last \n of HTTP headers. +static int parse_http_message(char *buf, int len, struct mg_connection *ri) { + int is_request, n; + + // Reset the connection. Make sure that we don't touch fields that are + // set elsewhere: remote_ip, remote_port, server_param + ri->request_method = ri->uri = ri->http_version = ri->query_string = NULL; + ri->num_headers = ri->status_code = ri->is_websocket = ri->content_len = 0; + + buf[len - 1] = '\0'; + + // RFC says that all initial whitespaces should be ingored + while (*buf != '\0' && isspace(* (unsigned char *) buf)) { + buf++; + } + ri->request_method = skip(&buf, " "); + ri->uri = skip(&buf, " "); + ri->http_version = skip(&buf, "\r\n"); + + // HTTP message could be either HTTP request or HTTP response, e.g. + // "GET / HTTP/1.0 ...." or "HTTP/1.0 200 OK ..." + is_request = is_valid_http_method(ri->request_method); + if ((is_request && memcmp(ri->http_version, "HTTP/", 5) != 0) || + (!is_request && memcmp(ri->request_method, "HTTP/", 5) != 0)) { + len = -1; + } else { + if (is_request) { + ri->http_version += 5; + } + parse_http_headers(&buf, ri); + + if ((ri->query_string = strchr(ri->uri, '?')) != NULL) { + *(char *) ri->query_string++ = '\0'; + } + n = (int) strlen(ri->uri); + mg_url_decode(ri->uri, n, (char *) ri->uri, n + 1, 0); + if (*ri->uri == '/' || *ri->uri == '.') { + remove_double_dots_and_double_slashes((char *) ri->uri); + } + } + + return len; } -#endif -// Windows happily opens files with some garbage at the end of file name. -// For example, fopen("a.cgi ", "r") on Windows successfully opens -// "a.cgi", despite one would expect an error back. -// This function returns non-0 if path ends with some garbage. -static int path_cannot_disclose_cgi(const char *path) { - static const char *allowed_last_characters = "_-"; - int last = path[strlen(path) - 1]; - return isalnum(last) || strchr(allowed_last_characters, last) != NULL; +static int lowercase(const char *s) { + return tolower(* (const unsigned char *) s); } -static int mg_stat(struct mg_connection *conn, const char *path, - struct file *filep) { - wchar_t wbuf[PATH_MAX]; - WIN32_FILE_ATTRIBUTE_DATA info; +static int mg_strcasecmp(const char *s1, const char *s2) { + int diff; - if (!is_file_in_memory(conn, path, filep)) { - to_unicode(path, wbuf, ARRAY_SIZE(wbuf)); - if (GetFileAttributesExW(wbuf, GetFileExInfoStandard, &info) != 0) { - filep->size = MAKEUQUAD(info.nFileSizeLow, info.nFileSizeHigh); - filep->modification_time = SYS2UNIX_TIME( - info.ftLastWriteTime.dwLowDateTime, - info.ftLastWriteTime.dwHighDateTime); - filep->is_directory = info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY; - // If file name is fishy, reset the file structure and return error. - // Note it is important to reset, not just return the error, cause - // functions like is_file_opened() check the struct. - if (!filep->is_directory && !path_cannot_disclose_cgi(path)) { - memset(filep, 0, sizeof(*filep)); - } - } - } + do { + diff = lowercase(s1++) - lowercase(s2++); + } while (diff == 0 && s1[-1] != '\0'); - return filep->membuf != NULL || filep->modification_time != 0; + return diff; } -static int mg_remove(const char *path) { - wchar_t wbuf[PATH_MAX]; - to_unicode(path, wbuf, ARRAY_SIZE(wbuf)); - return DeleteFileW(wbuf) ? 0 : -1; -} +static int mg_strncasecmp(const char *s1, const char *s2, size_t len) { + int diff = 0; -static int mg_mkdir(const char *path, int mode) { - char buf[PATH_MAX]; - wchar_t wbuf[PATH_MAX]; + if (len > 0) + do { + diff = lowercase(s1++) - lowercase(s2++); + } while (diff == 0 && s1[-1] != '\0' && --len > 0); - (void) mode; - mg_strlcpy(buf, path, sizeof(buf)); - change_slashes_to_backslashes(buf); + return diff; +} - (void) MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, ARRAY_SIZE(wbuf)); +// Return HTTP header value, or NULL if not found. +const char *mg_get_header(const struct mg_connection *ri, const char *s) { + int i; + + for (i = 0; i < ri->num_headers; i++) + if (!mg_strcasecmp(s, ri->http_headers[i].name)) + return ri->http_headers[i].value; + + return NULL; +} + +// Perform case-insensitive match of string against pattern +int mg_match_prefix(const char *pattern, int pattern_len, const char *str) { + const char *or_str; + int len, res, i = 0, j = 0; + + if ((or_str = (const char *) memchr(pattern, '|', pattern_len)) != NULL) { + res = mg_match_prefix(pattern, or_str - pattern, str); + return res > 0 ? res : mg_match_prefix(or_str + 1, + (pattern + pattern_len) - (or_str + 1), str); + } + + for (; i < pattern_len; i++, j++) { + if (pattern[i] == '?' && str[j] != '\0') { + continue; + } else if (pattern[i] == '$') { + return str[j] == '\0' ? j : -1; + } else if (pattern[i] == '*') { + i++; + if (pattern[i] == '*') { + i++; + len = (int) strlen(str + j); + } else { + len = (int) strcspn(str + j, "/"); + } + if (i == pattern_len) { + return j + len; + } + do { + res = mg_match_prefix(pattern + i, pattern_len - i, str + j + len); + } while (res == -1 && len-- > 0); + return res == -1 ? -1 : j + res + len; + } else if (lowercase(&pattern[i]) != lowercase(&str[j])) { + return -1; + } + } + return j; +} + +// This function prints HTML pages, and expands "{{something}}" blocks +// inside HTML by calling appropriate callback functions. +// Note that {{@path/to/file}} construct outputs embedded file's contents, +// which provides SSI-like functionality. +void mg_template(struct mg_connection *conn, const char *s, + struct mg_expansion *expansions) { + int i, j, pos = 0, inside_marker = 0; + + for (i = 0; s[i] != '\0'; i++) { + if (inside_marker == 0 && !memcmp(&s[i], "{{", 2)) { + if (i > pos) { + mg_send_data(conn, &s[pos], i - pos); + } + pos = i; + inside_marker = 1; + } + if (inside_marker == 1 && !memcmp(&s[i], "}}", 2)) { + for (j = 0; expansions[j].keyword != NULL; j++) { + const char *kw = expansions[j].keyword; + if ((int) strlen(kw) == i - (pos + 2) && + memcmp(kw, &s[pos + 2], i - (pos + 2)) == 0) { + expansions[j].handler(conn); + pos = i + 2; + break; + } + } + inside_marker = 0; + } + } + if (i > pos) { + mg_send_data(conn, &s[pos], i - pos); + } +} + +#ifndef MONGOOSE_NO_FILESYSTEM +static int must_hide_file(struct connection *conn, const char *path) { + const char *pw_pattern = "**" PASSWORDS_FILE_NAME "$"; + const char *pattern = conn->server->config_options[HIDE_FILES_PATTERN]; + return mg_match_prefix(pw_pattern, strlen(pw_pattern), path) > 0 || + (pattern != NULL && mg_match_prefix(pattern, strlen(pattern), path) > 0); +} + +// Return 1 if real file has been found, 0 otherwise +static int convert_uri_to_file_name(struct connection *conn, char *buf, + size_t buf_len, file_stat_t *st) { + struct vec a, b; + const char *rewrites = conn->server->config_options[URL_REWRITES]; + const char *root = conn->server->config_options[DOCUMENT_ROOT]; +#ifndef MONGOOSE_NO_CGI + const char *cgi_pat = conn->server->config_options[CGI_PATTERN]; + char *p; +#endif + const char *uri = conn->mg_conn.uri; + const char *domain = mg_get_header(&conn->mg_conn, "Host"); + int match_len, root_len = root == NULL ? 0 : strlen(root); + + // Perform virtual hosting rewrites + if (rewrites != NULL && domain != NULL) { + const char *colon = strchr(domain, ':'); + int domain_len = colon == NULL ? (int) strlen(domain) : colon - domain; + + while ((rewrites = next_option(rewrites, &a, &b)) != NULL) { + if (a.len > 1 && a.ptr[0] == '@' && a.len == domain_len + 1 && + mg_strncasecmp(a.ptr + 1, domain, domain_len) == 0) { + root = b.ptr; + root_len = b.len; + break; + } + } + } + + // No filesystem access + if (root == NULL || root_len == 0) return 0; + + // Handle URL rewrites + mg_snprintf(buf, buf_len, "%.*s%s", root_len, root, uri); + rewrites = conn->server->config_options[URL_REWRITES]; // Re-initialize! + while ((rewrites = next_option(rewrites, &a, &b)) != NULL) { + if ((match_len = mg_match_prefix(a.ptr, a.len, uri)) > 0) { + mg_snprintf(buf, buf_len, "%.*s%s", (int) b.len, b.ptr, uri + match_len); + break; + } + } + + if (stat(buf, st) == 0) return 1; + +#ifndef MONGOOSE_NO_CGI + // Support PATH_INFO for CGI scripts. + for (p = buf + strlen(root) + 2; *p != '\0'; p++) { + if (*p == '/') { + *p = '\0'; + if (mg_match_prefix(cgi_pat, strlen(cgi_pat), buf) > 0 && + !stat(buf, st)) { + DBG(("!!!! [%s]", buf)); + *p = '/'; + conn->path_info = mg_strdup(p); + *p = '\0'; + return 1; + } + *p = '/'; + } + } +#endif - return CreateDirectoryW(wbuf, NULL) ? 0 : -1; + return 0; } +#endif // MONGOOSE_NO_FILESYSTEM -// Implementation of POSIX opendir/closedir/readdir for Windows. -static DIR * opendir(const char *name) { - DIR *dir = NULL; - wchar_t wpath[PATH_MAX]; - DWORD attrs; - - if (name == NULL) { - SetLastError(ERROR_BAD_ARGUMENTS); - } else if ((dir = (DIR *) malloc(sizeof(*dir))) == NULL) { - SetLastError(ERROR_NOT_ENOUGH_MEMORY); - } else { - to_unicode(name, wpath, ARRAY_SIZE(wpath)); - attrs = GetFileAttributesW(wpath); - if (attrs != 0xFFFFFFFF && - ((attrs & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY)) { - (void) wcscat(wpath, L"\\*"); - dir->handle = FindFirstFileW(wpath, &dir->info); - dir->result.d_name[0] = '\0'; - } else { - free(dir); - dir = NULL; - } - } - - return dir; +static int should_keep_alive(const struct mg_connection *conn) { + struct connection *c = MG_CONN_2_CONN(conn); + const char *method = conn->request_method; + const char *http_version = conn->http_version; + const char *header = mg_get_header(conn, "Connection"); + return method != NULL && + (!strcmp(method, "GET") || c->endpoint_type == EP_USER) && + ((header != NULL && !mg_strcasecmp(header, "keep-alive")) || + (header == NULL && http_version && !strcmp(http_version, "1.1"))); } -static int closedir(DIR *dir) { - int result = 0; +int mg_write(struct mg_connection *c, const void *buf, int len) { + struct connection *conn = MG_CONN_2_CONN(c); + return ns_send(conn->ns_conn, buf, len); +} - if (dir != NULL) { - if (dir->handle != INVALID_HANDLE_VALUE) - result = FindClose(dir->handle) ? 0 : -1; +void mg_send_status(struct mg_connection *c, int status) { + if (c->status_code == 0) { + c->status_code = status; + mg_printf(c, "HTTP/1.1 %d %s\r\n", status, status_code_to_str(status)); + } +} - free(dir); - } else { - result = -1; - SetLastError(ERROR_BAD_ARGUMENTS); - } +void mg_send_header(struct mg_connection *c, const char *name, const char *v) { + if (c->status_code == 0) { + c->status_code = 200; + mg_printf(c, "HTTP/1.1 %d %s\r\n", 200, status_code_to_str(200)); + } + mg_printf(c, "%s: %s\r\n", name, v); +} - return result; +static void terminate_headers(struct mg_connection *c) { + struct connection *conn = MG_CONN_2_CONN(c); + if (!(conn->ns_conn->flags & MG_HEADERS_SENT)) { + mg_send_header(c, "Transfer-Encoding", "chunked"); + mg_write(c, "\r\n", 2); + conn->ns_conn->flags |= MG_HEADERS_SENT; + } } -static struct dirent *readdir(DIR *dir) { - struct dirent *result = 0; +void mg_send_data(struct mg_connection *c, const void *data, int data_len) { + terminate_headers(c); + write_chunk(MG_CONN_2_CONN(c), (const char *) data, data_len); +} - if (dir) { - if (dir->handle != INVALID_HANDLE_VALUE) { - result = &dir->result; - (void) WideCharToMultiByte(CP_UTF8, 0, - dir->info.cFileName, -1, result->d_name, - sizeof(result->d_name), NULL, NULL); +void mg_printf_data(struct mg_connection *c, const char *fmt, ...) { + struct connection *conn = MG_CONN_2_CONN(c); + va_list ap; + int len; + char mem[IOBUF_SIZE], *buf = mem; - if (!FindNextFileW(dir->handle, &dir->info)) { - (void) FindClose(dir->handle); - dir->handle = INVALID_HANDLE_VALUE; - } + terminate_headers(c); - } else { - SetLastError(ERROR_FILE_NOT_FOUND); - } - } else { - SetLastError(ERROR_BAD_ARGUMENTS); - } + va_start(ap, fmt); + len = ns_avprintf(&buf, sizeof(mem), fmt, ap); + va_end(ap); - return result; + if (len >= 0) { + write_chunk((struct connection *) conn, buf, len); + } + if (buf != mem && buf != NULL) { + free(buf); + } } -#define set_close_on_exec(x) // No FD_CLOEXEC on Windows - -int mg_start_thread(mg_thread_func_t f, void *p) { - return (long)_beginthread((void (__cdecl *)(void *)) f, 0, p) == -1L ? -1 : 0; +#if !defined(MONGOOSE_NO_WEBSOCKET) || !defined(MONGOOSE_NO_AUTH) +static int is_big_endian(void) { + static const int n = 1; + return ((char *) &n)[0] == 0; } +#endif -#if !defined(NO_SSL) -static HANDLE dlopen(const char *dll_name, int flags) { - wchar_t wbuf[PATH_MAX]; - (void) flags; - to_unicode(dll_name, wbuf, ARRAY_SIZE(wbuf)); - return LoadLibraryW(wbuf); -} +#ifndef MONGOOSE_NO_WEBSOCKET +// START OF SHA-1 code +// Copyright(c) By Steve Reid <steve@edmweb.com> +#define SHA1HANDSOFF +#if defined(__sun) +#include "solarisfixes.h" #endif -#if !defined(NO_CGI) -#define SIGKILL 0 -static int kill(pid_t pid, int sig_num) { - (void) TerminateProcess(pid, sig_num); - (void) CloseHandle(pid); - return 0; -} - -static void trim_trailing_whitespaces(char *s) { - char *e = s + strlen(s) - 1; - while (e > s && isspace(* (unsigned char *) e)) { - *e-- = '\0'; - } -} - -static pid_t spawn_process(struct mg_connection *conn, const char *prog, - char *envblk, char *envp[], int fd_stdin, - int fd_stdout, const char *dir) { - HANDLE me; - char *p, *interp, full_interp[PATH_MAX], full_dir[PATH_MAX], - cmdline[PATH_MAX], buf[PATH_MAX]; - struct file file = STRUCT_FILE_INITIALIZER; - STARTUPINFOA si; - PROCESS_INFORMATION pi = { 0 }; - - (void) envp; - - memset(&si, 0, sizeof(si)); - si.cb = sizeof(si); - - // TODO(lsm): redirect CGI errors to the error log file - si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW; - si.wShowWindow = SW_HIDE; - - me = GetCurrentProcess(); - DuplicateHandle(me, (HANDLE) _get_osfhandle(fd_stdin), me, - &si.hStdInput, 0, TRUE, DUPLICATE_SAME_ACCESS); - DuplicateHandle(me, (HANDLE) _get_osfhandle(fd_stdout), me, - &si.hStdOutput, 0, TRUE, DUPLICATE_SAME_ACCESS); - - // If CGI file is a script, try to read the interpreter line - interp = conn->ctx->config[CGI_INTERPRETER]; - if (interp == NULL) { - buf[0] = buf[1] = '\0'; - - // Read the first line of the script into the buffer - snprintf(cmdline, sizeof(cmdline), "%s%c%s", dir, '/', prog); - if (mg_fopen(conn, cmdline, "r", &file)) { - p = (char *) file.membuf; - mg_fgets(buf, sizeof(buf), &file, &p); - mg_fclose(&file); - buf[sizeof(buf) - 1] = '\0'; - } - - if (buf[0] == '#' && buf[1] == '!') { - trim_trailing_whitespaces(buf + 2); - } else { - buf[2] = '\0'; - } - interp = buf + 2; - } - - if (interp[0] != '\0') { - GetFullPathNameA(interp, sizeof(full_interp), full_interp, NULL); - interp = full_interp; - } - GetFullPathNameA(dir, sizeof(full_dir), full_dir, NULL); - - mg_snprintf(conn, cmdline, sizeof(cmdline), "%s%s%s\\%s", - interp, interp[0] == '\0' ? "" : " ", full_dir, prog); - - DEBUG_TRACE(("Running [%s]", cmdline)); - if (CreateProcessA(NULL, cmdline, NULL, NULL, TRUE, - CREATE_NEW_PROCESS_GROUP, envblk, NULL, &si, &pi) == 0) { - cry(conn, "%s: CreateProcess(%s): %ld", - __func__, cmdline, ERRNO); - pi.hProcess = (pid_t) -1; - } - - // Always close these to prevent handle leakage. - (void) close(fd_stdin); - (void) close(fd_stdout); - - (void) CloseHandle(si.hStdOutput); - (void) CloseHandle(si.hStdInput); - (void) CloseHandle(pi.hThread); - - return (pid_t) pi.hProcess; -} -#endif // !NO_CGI - -static int set_non_blocking_mode(SOCKET sock) { - unsigned long on = 1; - return ioctlsocket(sock, FIONBIO, &on); -} -#else -static int mg_stat(struct mg_connection *conn, const char *path, - struct file *filep) { - struct stat st; - - if (!is_file_in_memory(conn, path, filep) && !stat(path, &st)) { - filep->size = st.st_size; - filep->modification_time = st.st_mtime; - filep->is_directory = S_ISDIR(st.st_mode); - } else { - filep->modification_time = (time_t) 0; - } - - return filep->membuf != NULL || filep->modification_time != (time_t) 0; -} - -static void set_close_on_exec(int fd) { - fcntl(fd, F_SETFD, FD_CLOEXEC); -} - -int mg_start_thread(mg_thread_func_t func, void *param) { - pthread_t thread_id; - pthread_attr_t attr; - int result; - - (void) pthread_attr_init(&attr); - (void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); - // TODO(lsm): figure out why mongoose dies on Linux if next line is enabled - // (void) pthread_attr_setstacksize(&attr, sizeof(struct mg_connection) * 5); - - result = pthread_create(&thread_id, &attr, func, param); - pthread_attr_destroy(&attr); - - return result; -} - -#ifndef NO_CGI -static pid_t spawn_process(struct mg_connection *conn, const char *prog, - char *envblk, char *envp[], int fd_stdin, - int fd_stdout, const char *dir) { - pid_t pid; - const char *interp; - - (void) envblk; - - if ((pid = fork()) == -1) { - // Parent - send_http_error(conn, 500, http_500_error, "fork(): %s", strerror(ERRNO)); - } else if (pid == 0) { - // Child - if (chdir(dir) != 0) { - cry(conn, "%s: chdir(%s): %s", __func__, dir, strerror(ERRNO)); - } else if (dup2(fd_stdin, 0) == -1) { - cry(conn, "%s: dup2(%d, 0): %s", __func__, fd_stdin, strerror(ERRNO)); - } else if (dup2(fd_stdout, 1) == -1) { - cry(conn, "%s: dup2(%d, 1): %s", __func__, fd_stdout, strerror(ERRNO)); - } else { - // Not redirecting stderr to stdout, to avoid output being littered - // with the error messages. - (void) close(fd_stdin); - (void) close(fd_stdout); - - // After exec, all signal handlers are restored to their default values, - // with one exception of SIGCHLD. According to POSIX.1-2001 and Linux's - // implementation, SIGCHLD's handler will leave unchanged after exec - // if it was set to be ignored. Restore it to default action. - signal(SIGCHLD, SIG_DFL); - - interp = conn->ctx->config[CGI_INTERPRETER]; - if (interp == NULL) { - (void) execle(prog, prog, NULL, envp); - cry(conn, "%s: execle(%s): %s", __func__, prog, strerror(ERRNO)); - } else { - (void) execle(interp, interp, prog, NULL, envp); - cry(conn, "%s: execle(%s %s): %s", __func__, interp, prog, - strerror(ERRNO)); - } - } - exit(EXIT_FAILURE); - } - - // Parent. Close stdio descriptors - (void) close(fd_stdin); - (void) close(fd_stdout); - - return pid; -} -#endif // !NO_CGI - -static int set_non_blocking_mode(SOCKET sock) { - int flags; - - flags = fcntl(sock, F_GETFL, 0); - (void) fcntl(sock, F_SETFL, flags | O_NONBLOCK); - - return 0; -} -#endif // _WIN32 +union char64long16 { unsigned char c[64]; uint32_t l[16]; }; -#ifndef HAVE_POLL -static int poll(struct pollfd *pfd, int n, int milliseconds) { - struct timeval tv; - fd_set set; - int i, result, maxfd = 0; - - tv.tv_sec = milliseconds / 1000; - tv.tv_usec = (milliseconds % 1000) * 1000; - FD_ZERO(&set); - - for (i = 0; i < n; i++) { - FD_SET((SOCKET) pfd[i].fd, &set); - pfd[i].revents = 0; - - if (pfd[i].fd > maxfd) { - maxfd = pfd[i].fd; - } - } - - if ((result = select(maxfd + 1, &set, NULL, NULL, &tv)) > 0) { - for (i = 0; i < n; i++) { - if (FD_ISSET(pfd[i].fd, &set)) { - pfd[i].revents = POLLIN; - } - } - } - - return result; -} -#endif // HAVE_POLL - -// Write data to the IO channel - opened file descriptor, socket or SSL -// descriptor. Return number of bytes written. -static int64_t push(FILE *fp, SOCKET sock, SSL *ssl, const char *buf, - int64_t len) { - int64_t sent; - int n, k; - - (void) ssl; // Get rid of warning - sent = 0; - while (sent < len) { - // How many bytes we send in this iteration - k = len - sent > INT_MAX ? INT_MAX : (int) (len - sent); - -#ifndef NO_SSL - if (ssl != NULL) { - n = SSL_write(ssl, buf + sent, k); - } else -#endif - if (fp != NULL) { - n = (int) fwrite(buf + sent, 1, (size_t) k, fp); - if (ferror(fp)) - n = -1; - } else { - n = send(sock, buf + sent, (size_t) k, MSG_NOSIGNAL); - } - - if (n <= 0) - break; - - sent += n; - } - - return sent; -} - -// Read from IO channel - opened file descriptor, socket, or SSL descriptor. -// Return negative value on error, or number of bytes read on success. -static int pull(FILE *fp, struct mg_connection *conn, char *buf, int len) { - int nread; - - if (fp != NULL) { - // Use read() instead of fread(), because if we're reading from the CGI - // pipe, fread() may block until IO buffer is filled up. We cannot afford - // to block and must pass all read bytes immediately to the client. - nread = read(fileno(fp), buf, (size_t) len); -#ifndef NO_SSL - } else if (conn->ssl != NULL) { - nread = SSL_read(conn->ssl, buf, len); -#endif - } else { - nread = recv(conn->client.sock, buf, (size_t) len, 0); - } - - return conn->ctx->stop_flag ? -1 : nread; -} - -static int pull_all(FILE *fp, struct mg_connection *conn, char *buf, int len) { - int n, nread = 0; - - while (len > 0) { - n = pull(fp, conn, buf + nread, len); - if (n < 0) { - nread = n; // Propagate the error - break; - } else if (n == 0) { - break; // No more data to read - } else { - conn->consumed_content += n; - nread += n; - len -= n; - } - } - - return nread; -} - -int mg_read(struct mg_connection *conn, void *buf, size_t len) { - int n, buffered_len, nread; - const char *body; - - // If Content-Length is not set, read until socket is closed - if (conn->consumed_content == 0 && conn->content_len == 0) { - conn->content_len = INT64_MAX; - conn->must_close = 1; - } - - nread = 0; - if (conn->consumed_content < conn->content_len) { - // Adjust number of bytes to read. - int64_t to_read = conn->content_len - conn->consumed_content; - if (to_read < (int64_t) len) { - len = (size_t) to_read; - } - - // Return buffered data - body = conn->buf + conn->request_len + conn->consumed_content; - buffered_len = &conn->buf[conn->data_len] - body; - if (buffered_len > 0) { - if (len < (size_t) buffered_len) { - buffered_len = (int) len; - } - memcpy(buf, body, (size_t) buffered_len); - len -= buffered_len; - conn->consumed_content += buffered_len; - nread += buffered_len; - buf = (char *) buf + buffered_len; - } - - // We have returned all buffered data. Read new data from the remote socket. - n = pull_all(NULL, conn, (char *) buf, (int) len); - nread = n >= 0 ? nread + n : n; - } - return nread; -} - -int mg_write(struct mg_connection *conn, const void *buf, size_t len) { - time_t now; - int64_t n, total, allowed; - - if (conn->throttle > 0) { - if ((now = time(NULL)) != conn->last_throttle_time) { - conn->last_throttle_time = now; - conn->last_throttle_bytes = 0; - } - allowed = conn->throttle - conn->last_throttle_bytes; - if (allowed > (int64_t) len) { - allowed = len; - } - if ((total = push(NULL, conn->client.sock, conn->ssl, (const char *) buf, - (int64_t) allowed)) == allowed) { - buf = (char *) buf + total; - conn->last_throttle_bytes += total; - while (total < (int64_t) len && conn->ctx->stop_flag == 0) { - allowed = conn->throttle > (int64_t) len - total ? - (int64_t) len - total : conn->throttle; - if ((n = push(NULL, conn->client.sock, conn->ssl, (const char *) buf, - (int64_t) allowed)) != allowed) { - break; - } - sleep(1); - conn->last_throttle_bytes = allowed; - conn->last_throttle_time = time(NULL); - buf = (char *) buf + n; - total += n; - } - } - } else { - total = push(NULL, conn->client.sock, conn->ssl, (const char *) buf, - (int64_t) len); - } - return (int) total; +#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits)))) + +static uint32_t blk0(union char64long16 *block, int i) { + // Forrest: SHA expect BIG_ENDIAN, swap if LITTLE_ENDIAN + if (!is_big_endian()) { + block->l[i] = (rol(block->l[i], 24) & 0xFF00FF00) | + (rol(block->l[i], 8) & 0x00FF00FF); + } + return block->l[i]; } -// Print message to buffer. If buffer is large enough to hold the message, -// return buffer. If buffer is to small, allocate large enough buffer on heap, -// and return allocated buffer. -static int alloc_vprintf(char **buf, size_t size, const char *fmt, va_list ap) { - va_list ap_copy; - int len; +#define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \ + ^block->l[(i+2)&15]^block->l[i&15],1)) +#define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk0(block, i)+0x5A827999+rol(v,5);w=rol(w,30); +#define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=rol(w,30); +#define R2(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=rol(w,30); +#define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30); +#define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30); - // Windows is not standard-compliant, and vsnprintf() returns -1 if - // buffer is too small. Also, older versions of msvcrt.dll do not have - // _vscprintf(). However, if size is 0, vsnprintf() behaves correctly. - // Therefore, we make two passes: on first pass, get required message length. - // On second pass, actually print the message. - va_copy(ap_copy, ap); - len = vsnprintf(NULL, 0, fmt, ap_copy); +typedef struct { + uint32_t state[5]; + uint32_t count[2]; + unsigned char buffer[64]; +} SHA1_CTX; - if (len > (int) size && - (size = len + 1) > 0 && - (*buf = (char *) malloc(size)) == NULL) { - len = -1; // Allocation failed, mark failure - } else { - va_copy(ap_copy, ap); - vsnprintf(*buf, size, fmt, ap_copy); - } +static void SHA1Transform(uint32_t state[5], const unsigned char buffer[64]) { + uint32_t a, b, c, d, e; + union char64long16 block[1]; + + memcpy(block, buffer, 64); + a = state[0]; + b = state[1]; + c = state[2]; + d = state[3]; + e = state[4]; + R0(a,b,c,d,e, 0); R0(e,a,b,c,d, 1); R0(d,e,a,b,c, 2); R0(c,d,e,a,b, 3); + R0(b,c,d,e,a, 4); R0(a,b,c,d,e, 5); R0(e,a,b,c,d, 6); R0(d,e,a,b,c, 7); + R0(c,d,e,a,b, 8); R0(b,c,d,e,a, 9); R0(a,b,c,d,e,10); R0(e,a,b,c,d,11); + R0(d,e,a,b,c,12); R0(c,d,e,a,b,13); R0(b,c,d,e,a,14); R0(a,b,c,d,e,15); + R1(e,a,b,c,d,16); R1(d,e,a,b,c,17); R1(c,d,e,a,b,18); R1(b,c,d,e,a,19); + R2(a,b,c,d,e,20); R2(e,a,b,c,d,21); R2(d,e,a,b,c,22); R2(c,d,e,a,b,23); + R2(b,c,d,e,a,24); R2(a,b,c,d,e,25); R2(e,a,b,c,d,26); R2(d,e,a,b,c,27); + R2(c,d,e,a,b,28); R2(b,c,d,e,a,29); R2(a,b,c,d,e,30); R2(e,a,b,c,d,31); + R2(d,e,a,b,c,32); R2(c,d,e,a,b,33); R2(b,c,d,e,a,34); R2(a,b,c,d,e,35); + R2(e,a,b,c,d,36); R2(d,e,a,b,c,37); R2(c,d,e,a,b,38); R2(b,c,d,e,a,39); + R3(a,b,c,d,e,40); R3(e,a,b,c,d,41); R3(d,e,a,b,c,42); R3(c,d,e,a,b,43); + R3(b,c,d,e,a,44); R3(a,b,c,d,e,45); R3(e,a,b,c,d,46); R3(d,e,a,b,c,47); + R3(c,d,e,a,b,48); R3(b,c,d,e,a,49); R3(a,b,c,d,e,50); R3(e,a,b,c,d,51); + R3(d,e,a,b,c,52); R3(c,d,e,a,b,53); R3(b,c,d,e,a,54); R3(a,b,c,d,e,55); + R3(e,a,b,c,d,56); R3(d,e,a,b,c,57); R3(c,d,e,a,b,58); R3(b,c,d,e,a,59); + R4(a,b,c,d,e,60); R4(e,a,b,c,d,61); R4(d,e,a,b,c,62); R4(c,d,e,a,b,63); + R4(b,c,d,e,a,64); R4(a,b,c,d,e,65); R4(e,a,b,c,d,66); R4(d,e,a,b,c,67); + R4(c,d,e,a,b,68); R4(b,c,d,e,a,69); R4(a,b,c,d,e,70); R4(e,a,b,c,d,71); + R4(d,e,a,b,c,72); R4(c,d,e,a,b,73); R4(b,c,d,e,a,74); R4(a,b,c,d,e,75); + R4(e,a,b,c,d,76); R4(d,e,a,b,c,77); R4(c,d,e,a,b,78); R4(b,c,d,e,a,79); + state[0] += a; + state[1] += b; + state[2] += c; + state[3] += d; + state[4] += e; + // Erase working structures. The order of operations is important, + // used to ensure that compiler doesn't optimize those out. + memset(block, 0, sizeof(block)); + a = b = c = d = e = 0; + (void) a; (void) b; (void) c; (void) d; (void) e; +} - return len; +static void SHA1Init(SHA1_CTX* context) { + context->state[0] = 0x67452301; + context->state[1] = 0xEFCDAB89; + context->state[2] = 0x98BADCFE; + context->state[3] = 0x10325476; + context->state[4] = 0xC3D2E1F0; + context->count[0] = context->count[1] = 0; } -int mg_vprintf(struct mg_connection *conn, const char *fmt, va_list ap) { - char mem[MG_BUF_LEN], *buf = mem; - int len; +static void SHA1Update(SHA1_CTX* context, const unsigned char* data, + uint32_t len) { + uint32_t i, j; + + j = context->count[0]; + if ((context->count[0] += len << 3) < j) + context->count[1]++; + context->count[1] += (len>>29); + j = (j >> 3) & 63; + if ((j + len) > 63) { + memcpy(&context->buffer[j], data, (i = 64-j)); + SHA1Transform(context->state, context->buffer); + for ( ; i + 63 < len; i += 64) { + SHA1Transform(context->state, &data[i]); + } + j = 0; + } + else i = 0; + memcpy(&context->buffer[j], &data[i], len - i); +} - if ((len = alloc_vprintf(&buf, sizeof(mem), fmt, ap)) > 0) { - len = mg_write(conn, buf, (size_t) len); - } - if (buf != mem && buf != NULL) { - free(buf); - } +static void SHA1Final(unsigned char digest[20], SHA1_CTX* context) { + unsigned i; + unsigned char finalcount[8], c; + + for (i = 0; i < 8; i++) { + finalcount[i] = (unsigned char)((context->count[(i >= 4 ? 0 : 1)] + >> ((3-(i & 3)) * 8) ) & 255); + } + c = 0200; + SHA1Update(context, &c, 1); + while ((context->count[0] & 504) != 448) { + c = 0000; + SHA1Update(context, &c, 1); + } + SHA1Update(context, finalcount, 8); + for (i = 0; i < 20; i++) { + digest[i] = (unsigned char) + ((context->state[i>>2] >> ((3-(i & 3)) * 8) ) & 255); + } + memset(context, '\0', sizeof(*context)); + memset(&finalcount, '\0', sizeof(finalcount)); +} +// END OF SHA1 CODE - return len; +static void base64_encode(const unsigned char *src, int src_len, char *dst) { + static const char *b64 = + "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; + int i, j, a, b, c; + + for (i = j = 0; i < src_len; i += 3) { + a = src[i]; + b = i + 1 >= src_len ? 0 : src[i + 1]; + c = i + 2 >= src_len ? 0 : src[i + 2]; + + dst[j++] = b64[a >> 2]; + dst[j++] = b64[((a & 3) << 4) | (b >> 4)]; + if (i + 1 < src_len) { + dst[j++] = b64[(b & 15) << 2 | (c >> 6)]; + } + if (i + 2 < src_len) { + dst[j++] = b64[c & 63]; + } + } + while (j % 4 != 0) { + dst[j++] = '='; + } + dst[j++] = '\0'; +} + +static void send_websocket_handshake(struct mg_connection *conn, + const char *key) { + static const char *magic = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"; + char buf[500], sha[20], b64_sha[sizeof(sha) * 2]; + SHA1_CTX sha_ctx; + + mg_snprintf(buf, sizeof(buf), "%s%s", key, magic); + SHA1Init(&sha_ctx); + SHA1Update(&sha_ctx, (unsigned char *) buf, strlen(buf)); + SHA1Final((unsigned char *) sha, &sha_ctx); + base64_encode((unsigned char *) sha, sizeof(sha), b64_sha); + mg_snprintf(buf, sizeof(buf), "%s%s%s", + "HTTP/1.1 101 Switching Protocols\r\n" + "Upgrade: websocket\r\n" + "Connection: Upgrade\r\n" + "Sec-WebSocket-Accept: ", b64_sha, "\r\n\r\n"); + + mg_write(conn, buf, strlen(buf)); +} + +static int deliver_websocket_frame(struct connection *conn) { + // Having buf unsigned char * is important, as it is used below in arithmetic + unsigned char *buf = (unsigned char *) conn->ns_conn->recv_iobuf.buf; + int i, len, buf_len = conn->ns_conn->recv_iobuf.len, frame_len = 0, + mask_len = 0, header_len = 0, data_len = 0, buffered = 0; + + if (buf_len >= 2) { + len = buf[1] & 127; + mask_len = buf[1] & 128 ? 4 : 0; + if (len < 126 && buf_len >= mask_len) { + data_len = len; + header_len = 2 + mask_len; + } else if (len == 126 && buf_len >= 4 + mask_len) { + header_len = 4 + mask_len; + data_len = ((((int) buf[2]) << 8) + buf[3]); + } else if (buf_len >= 10 + mask_len) { + header_len = 10 + mask_len; + data_len = (int) (((uint64_t) htonl(* (uint32_t *) &buf[2])) << 32) + + htonl(* (uint32_t *) &buf[6]); + } + } + + frame_len = header_len + data_len; + buffered = frame_len > 0 && frame_len <= buf_len; + + if (buffered) { + conn->mg_conn.content_len = data_len; + conn->mg_conn.content = (char *) buf + header_len; + conn->mg_conn.wsbits = buf[0]; + + // Apply mask if necessary + if (mask_len > 0) { + for (i = 0; i < data_len; i++) { + buf[i + header_len] ^= (buf + header_len - mask_len)[i % 4]; + } + } + + // Call the handler and remove frame from the iobuf + if (call_user(conn, MG_REQUEST) == MG_FALSE) { + conn->ns_conn->flags |= NSF_FINISHED_SENDING_DATA; + } + iobuf_remove(&conn->ns_conn->recv_iobuf, frame_len); + } + + return buffered; } -int mg_printf(struct mg_connection *conn, const char *fmt, ...) { - va_list ap; - va_start(ap, fmt); - return mg_vprintf(conn, fmt, ap); +int mg_websocket_write(struct mg_connection* conn, int opcode, + const char *data, size_t data_len) { + unsigned char mem[4192], *copy = mem; + size_t copy_len = 0; + int retval = -1; + + if (data_len + 10 > sizeof(mem) && + (copy = (unsigned char *) malloc(data_len + 10)) == NULL) { + return -1; + } + + copy[0] = 0x80 + (opcode & 0x0f); + + // Frame format: http://tools.ietf.org/html/rfc6455#section-5.2 + if (data_len < 126) { + // Inline 7-bit length field + copy[1] = data_len; + memcpy(copy + 2, data, data_len); + copy_len = 2 + data_len; + } else if (data_len <= 0xFFFF) { + // 16-bit length field + copy[1] = 126; + * (uint16_t *) (copy + 2) = (uint16_t) htons((uint16_t) data_len); + memcpy(copy + 4, data, data_len); + copy_len = 4 + data_len; + } else { + // 64-bit length field + copy[1] = 127; + * (uint32_t *) (copy + 2) = (uint32_t) + htonl((uint32_t) ((uint64_t) data_len >> 32)); + * (uint32_t *) (copy + 6) = (uint32_t) htonl(data_len & 0xffffffff); + memcpy(copy + 10, data, data_len); + copy_len = 10 + data_len; + } + + if (copy_len > 0) { + retval = mg_write(conn, copy, copy_len); + } + if (copy != mem) { + free(copy); + } + + return retval; +} + +int mg_websocket_printf(struct mg_connection* conn, int opcode, + const char *fmt, ...) { + char mem[4192], *buf = mem; + va_list ap; + int len; + + va_start(ap, fmt); + if ((len = ns_avprintf(&buf, sizeof(mem), fmt, ap)) > 0) { + mg_websocket_write(conn, opcode, buf, len); + } + va_end(ap); + + if (buf != mem && buf != NULL) { + free(buf); + } + + return len; +} + +static void send_websocket_handshake_if_requested(struct mg_connection *conn) { + const char *ver = mg_get_header(conn, "Sec-WebSocket-Version"), + *key = mg_get_header(conn, "Sec-WebSocket-Key"); + if (ver != NULL && key != NULL) { + conn->is_websocket = 1; + if (call_user(MG_CONN_2_CONN(conn), MG_WS_HANDSHAKE) == MG_FALSE) { + send_websocket_handshake(conn, key); + } + } +} + +static void ping_idle_websocket_connection(struct connection *conn, time_t t) { + if (t - conn->ns_conn->last_io_time > MONGOOSE_USE_WEBSOCKET_PING_INTERVAL) { + mg_websocket_write(&conn->mg_conn, WEBSOCKET_OPCODE_PING, "", 0); + } } +#else +#define ping_idle_websocket_connection(conn, t) +#endif // !MONGOOSE_NO_WEBSOCKET -int mg_url_decode(const char *src, int src_len, char *dst, - int dst_len, int is_form_url_encoded) { - int i, j, a, b; -#define HEXTOI(x) (isdigit(x) ? x - '0' : x - 'W') +static void write_terminating_chunk(struct connection *conn) { + mg_write(&conn->mg_conn, "0\r\n\r\n", 5); +} - for (i = j = 0; i < src_len && j < dst_len - 1; i++, j++) { - if (src[i] == '%' && i < src_len - 2 && - isxdigit(* (const unsigned char *) (src + i + 1)) && - isxdigit(* (const unsigned char *) (src + i + 2))) { - a = tolower(* (const unsigned char *) (src + i + 1)); - b = tolower(* (const unsigned char *) (src + i + 2)); - dst[j] = (char) ((HEXTOI(a) << 4) | HEXTOI(b)); - i += 2; - } else if (is_form_url_encoded && src[i] == '+') { - dst[j] = ' '; - } else { - dst[j] = src[i]; - } - } - - dst[j] = '\0'; // Null-terminate the destination - - return i >= src_len ? j : -1; -} - -int mg_get_var(const char *data, size_t data_len, const char *name, - char *dst, size_t dst_len) { - const char *p, *e, *s; - size_t name_len; - int len; - - if (dst == NULL || dst_len == 0) { - len = -2; - } else if (data == NULL || name == NULL || data_len == 0) { - len = -1; - dst[0] = '\0'; - } else { - name_len = strlen(name); - e = data + data_len; - len = -1; - dst[0] = '\0'; - - // data is "var1=val1&var2=val2...". Find variable first - for (p = data; p + name_len < e; p++) { - if ((p == data || p[-1] == '&') && p[name_len] == '=' && - !mg_strncasecmp(name, p, name_len)) { - // Point p to variable value - p += name_len + 1; - - // Point s to the end of the value - s = (const char *) memchr(p, '&', (size_t)(e - p)); - if (s == NULL) { - s = e; - } - assert(s >= p); - - // Decode variable into destination buffer - len = mg_url_decode(p, (size_t)(s - p), dst, dst_len, 1); - - // Redirect error code from -1 to -2 (destination buffer too small). - if (len == -1) { - len = -2; - } - break; - } - } - } - - return len; -} - -int mg_get_cookie(const char *cookie_header, const char *var_name, - char *dst, size_t dst_size) { - const char *s, *p, *end; - int name_len, len = -1; - - if (dst == NULL || dst_size == 0) { - len = -2; - } else if (var_name == NULL || (s = cookie_header) == NULL) { - len = -1; - dst[0] = '\0'; - } else { - name_len = (int) strlen(var_name); - end = s + strlen(s); - dst[0] = '\0'; - - for (; (s = mg_strcasestr(s, var_name)) != NULL; s += name_len) { - if (s[name_len] == '=') { - s += name_len + 1; - if ((p = strchr(s, ' ')) == NULL) - p = end; - if (p[-1] == ';') - p--; - if (*s == '"' && p[-1] == '"' && p > s + 1) { - s++; - p--; - } - if ((size_t) (p - s) < dst_size) { - len = p - s; - mg_strlcpy(dst, s, (size_t) len + 1); - } else { - len = -3; - } - break; - } - } - } - return len; -} - -static void convert_uri_to_file_name(struct mg_connection *conn, char *buf, - size_t buf_len, struct file *filep) { - struct vec a, b; - const char *rewrite, *uri = conn->request_info.uri; - char *p; - int match_len; - char gz_path[PATH_MAX]; - char const* accept_encoding; - - // Using buf_len - 1 because memmove() for PATH_INFO may shift part - // of the path one byte on the right. - mg_snprintf(conn, buf, buf_len - 1, "%s%s", conn->ctx->config[DOCUMENT_ROOT], - uri); - - rewrite = conn->ctx->config[REWRITE]; - while ((rewrite = next_option(rewrite, &a, &b)) != NULL) { - if ((match_len = match_prefix(a.ptr, a.len, uri)) > 0) { - mg_snprintf(conn, buf, buf_len - 1, "%.*s%s", (int) b.len, b.ptr, - uri + match_len); - break; - } - } - - if (mg_stat(conn, buf, filep)) return; - - // if we can't find the actual file, look for the file - // with the same name but a .gz extension. If we find it, - // use that and set the gzipped flag in the file struct - // to indicate that the response need to have the content- - // encoding: gzip header - // we can only do this if the browser declares support - if ((accept_encoding = mg_get_header(conn, "Accept-Encoding")) != NULL) { - if (strstr(accept_encoding,"gzip") != NULL) { - snprintf(gz_path, sizeof(gz_path), "%s.gz", buf); - if (mg_stat(conn, gz_path, filep)) { - filep->gzipped = 1; - return; - } - } - } - - // Support PATH_INFO for CGI scripts. - for (p = buf + strlen(buf); p > buf + 1; p--) { - if (*p == '/') { - *p = '\0'; - if (match_prefix(conn->ctx->config[CGI_EXTENSIONS], - strlen(conn->ctx->config[CGI_EXTENSIONS]), buf) > 0 && - mg_stat(conn, buf, filep)) { - // Shift PATH_INFO block one character right, e.g. - // "/x.cgi/foo/bar\x00" => "/x.cgi\x00/foo/bar\x00" - // conn->path_info is pointing to the local variable "path" declared - // in handle_request(), so PATH_INFO is not valid after - // handle_request returns. - conn->path_info = p + 1; - memmove(p + 2, p + 1, strlen(p + 1) + 1); // +1 is for trailing \0 - p[1] = '/'; - break; - } else { - *p = '/'; - } - } - } +static int call_request_handler(struct connection *conn) { + int result; + conn->mg_conn.content = conn->ns_conn->recv_iobuf.buf; + if ((result = call_user(conn, MG_REQUEST)) == MG_TRUE) { + if (conn->ns_conn->flags & MG_HEADERS_SENT) { + write_terminating_chunk(conn); + } + close_local_endpoint(conn); + } + return result; } -// Check whether full request is buffered. Return: -// -1 if request is malformed -// 0 if request is not yet fully buffered -// >0 actual request length, including last \r\n\r\n -static int get_request_len(const char *buf, int buflen) { - const char *s, *e; - int len = 0; - - for (s = buf, e = s + buflen - 1; len <= 0 && s < e; s++) - // Control characters are not allowed but >=128 is. - if (!isprint(* (const unsigned char *) s) && *s != '\r' && - *s != '\n' && * (const unsigned char *) s < 128) { - len = -1; - break; // [i_a] abort scan as soon as one malformed character is found; - // don't let subsequent \r\n\r\n win us over anyhow - } else if (s[0] == '\n' && s[1] == '\n') { - len = (int) (s - buf) + 2; - } else if (s[0] == '\n' && &s[1] < e && - s[1] == '\r' && s[2] == '\n') { - len = (int) (s - buf) + 3; - } - - return len; +const char *mg_get_mime_type(const char *path, const char *default_mime_type) { + const char *ext; + size_t i, path_len; + + path_len = strlen(path); + + for (i = 0; static_builtin_mime_types[i].extension != NULL; i++) { + ext = path + (path_len - static_builtin_mime_types[i].ext_len); + if (path_len > static_builtin_mime_types[i].ext_len && + mg_strcasecmp(ext, static_builtin_mime_types[i].extension) == 0) { + return static_builtin_mime_types[i].mime_type; + } + } + + return default_mime_type; } +#ifndef MONGOOSE_NO_FILESYSTEM // Convert month to the month number. Return -1 on error, or month number static int get_month_index(const char *s) { - size_t i; + static const char *month_names[] = { + "Jan", "Feb", "Mar", "Apr", "May", "Jun", + "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" + }; + int i; - for (i = 0; i < ARRAY_SIZE(month_names); i++) - if (!strcmp(s, month_names[i])) - return (int) i; + for (i = 0; i < (int) ARRAY_SIZE(month_names); i++) + if (!strcmp(s, month_names[i])) + return i; - return -1; + return -1; } static int num_leap_years(int year) { - return year / 4 - year / 100 + year / 400; + return year / 4 - year / 100 + year / 400; } // Parse UTC date-time string, and return the corresponding time_t value. static time_t parse_date_string(const char *datetime) { - static const unsigned short days_before_month[] = { - 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 - }; - char month_str[32]; - int second, minute, hour, day, month, year, leap_days, days; - time_t result = (time_t) 0; - - if (((sscanf(datetime, "%d/%3s/%d %d:%d:%d", - &day, month_str, &year, &hour, &minute, &second) == 6) || - (sscanf(datetime, "%d %3s %d %d:%d:%d", - &day, month_str, &year, &hour, &minute, &second) == 6) || - (sscanf(datetime, "%*3s, %d %3s %d %d:%d:%d", - &day, month_str, &year, &hour, &minute, &second) == 6) || - (sscanf(datetime, "%d-%3s-%d %d:%d:%d", - &day, month_str, &year, &hour, &minute, &second) == 6)) && - year > 1970 && - (month = get_month_index(month_str)) != -1) { - leap_days = num_leap_years(year) - num_leap_years(1970); - year -= 1970; - days = year * 365 + days_before_month[month] + (day - 1) + leap_days; - result = days * 24 * 3600 + hour * 3600 + minute * 60 + second; - } - - return result; + static const unsigned short days_before_month[] = { + 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 + }; + char month_str[32]; + int second, minute, hour, day, month, year, leap_days, days; + time_t result = (time_t) 0; + + if (((sscanf(datetime, "%d/%3s/%d %d:%d:%d", + &day, month_str, &year, &hour, &minute, &second) == 6) || + (sscanf(datetime, "%d %3s %d %d:%d:%d", + &day, month_str, &year, &hour, &minute, &second) == 6) || + (sscanf(datetime, "%*3s, %d %3s %d %d:%d:%d", + &day, month_str, &year, &hour, &minute, &second) == 6) || + (sscanf(datetime, "%d-%3s-%d %d:%d:%d", + &day, month_str, &year, &hour, &minute, &second) == 6)) && + year > 1970 && + (month = get_month_index(month_str)) != -1) { + leap_days = num_leap_years(year) - num_leap_years(1970); + year -= 1970; + days = year * 365 + days_before_month[month] + (day - 1) + leap_days; + result = days * 24 * 3600 + hour * 3600 + minute * 60 + second; + } + + return result; } -// Protect against directory disclosure attack by removing '..', -// excessive '/' and '\' characters -static void remove_double_dots_and_double_slashes(char *s) { - char *p = s; - - while (*s != '\0') { - *p++ = *s++; - if (s[-1] == '/' || s[-1] == '\\') { - // Skip all following slashes, backslashes and double-dots - while (s[0] != '\0') { - if (s[0] == '/' || s[0] == '\\') { - s++; - } else if (s[0] == '.' && s[1] == '.') { - s += 2; - } else { - break; - } - } - } - } - *p = '\0'; +// Look at the "path" extension and figure what mime type it has. +// Store mime type in the vector. +static void get_mime_type(const struct mg_server *server, const char *path, + struct vec *vec) { + struct vec ext_vec, mime_vec; + const char *list, *ext; + size_t path_len; + + path_len = strlen(path); + + // Scan user-defined mime types first, in case user wants to + // override default mime types. + list = server->config_options[EXTRA_MIME_TYPES]; + while ((list = next_option(list, &ext_vec, &mime_vec)) != NULL) { + // ext now points to the path suffix + ext = path + path_len - ext_vec.len; + if (mg_strncasecmp(ext, ext_vec.ptr, ext_vec.len) == 0) { + *vec = mime_vec; + return; + } + } + + vec->ptr = mg_get_mime_type(path, "text/plain"); + vec->len = strlen(vec->ptr); } -static const struct { - const char *extension; - size_t ext_len; - const char *mime_type; -} builtin_mime_types[] = { - {".html", 5, "text/html"}, - {".htm", 4, "text/html"}, - {".shtm", 5, "text/html"}, - {".shtml", 6, "text/html"}, - {".css", 4, "text/css"}, - {".js", 3, "application/x-javascript"}, - {".ico", 4, "image/x-icon"}, - {".gif", 4, "image/gif"}, - {".jpg", 4, "image/jpeg"}, - {".jpeg", 5, "image/jpeg"}, - {".png", 4, "image/png"}, - {".svg", 4, "image/svg+xml"}, - {".txt", 4, "text/plain"}, - {".torrent", 8, "application/x-bittorrent"}, - {".wav", 4, "audio/x-wav"}, - {".mp3", 4, "audio/x-mp3"}, - {".mid", 4, "audio/mid"}, - {".m3u", 4, "audio/x-mpegurl"}, - {".ogg", 4, "audio/ogg"}, - {".ram", 4, "audio/x-pn-realaudio"}, - {".xml", 4, "text/xml"}, - {".json", 5, "text/json"}, - {".xslt", 5, "application/xml"}, - {".xsl", 4, "application/xml"}, - {".ra", 3, "audio/x-pn-realaudio"}, - {".doc", 4, "application/msword"}, - {".exe", 4, "application/octet-stream"}, - {".zip", 4, "application/x-zip-compressed"}, - {".xls", 4, "application/excel"}, - {".tgz", 4, "application/x-tar-gz"}, - {".tar", 4, "application/x-tar"}, - {".gz", 3, "application/x-gunzip"}, - {".arj", 4, "application/x-arj-compressed"}, - {".rar", 4, "application/x-arj-compressed"}, - {".rtf", 4, "application/rtf"}, - {".pdf", 4, "application/pdf"}, - {".swf", 4, "application/x-shockwave-flash"}, - {".mpg", 4, "video/mpeg"}, - {".webm", 5, "video/webm"}, - {".mpeg", 5, "video/mpeg"}, - {".mov", 4, "video/quicktime"}, - {".mp4", 4, "video/mp4"}, - {".m4v", 4, "video/x-m4v"}, - {".asf", 4, "video/x-ms-asf"}, - {".avi", 4, "video/x-msvideo"}, - {".bmp", 4, "image/bmp"}, - {".ttf", 4, "application/x-font-ttf"}, - {NULL, 0, NULL} +static const char *suggest_connection_header(const struct mg_connection *conn) { + return should_keep_alive(conn) ? "keep-alive" : "close"; +} + +static void construct_etag(char *buf, size_t buf_len, const file_stat_t *st) { + mg_snprintf(buf, buf_len, "\"%lx.%" INT64_FMT "\"", + (unsigned long) st->st_mtime, (int64_t) st->st_size); +} + +// Return True if we should reply 304 Not Modified. +static int is_not_modified(const struct connection *conn, + const file_stat_t *stp) { + char etag[64]; + const char *ims = mg_get_header(&conn->mg_conn, "If-Modified-Since"); + const char *inm = mg_get_header(&conn->mg_conn, "If-None-Match"); + construct_etag(etag, sizeof(etag), stp); + return (inm != NULL && !mg_strcasecmp(etag, inm)) || + (ims != NULL && stp->st_mtime <= parse_date_string(ims)); +} + +// For given directory path, substitute it to valid index file. +// Return 0 if index file has been found, -1 if not found. +// If the file is found, it's stats is returned in stp. +static int find_index_file(struct connection *conn, char *path, + size_t path_len, file_stat_t *stp) { + const char *list = conn->server->config_options[INDEX_FILES]; + file_stat_t st; + struct vec filename_vec; + size_t n = strlen(path), found = 0; + + // The 'path' given to us points to the directory. Remove all trailing + // directory separator characters from the end of the path, and + // then append single directory separator character. + while (n > 0 && path[n - 1] == '/') { + n--; + } + path[n] = '/'; + + // Traverse index files list. For each entry, append it to the given + // path and see if the file exists. If it exists, break the loop + while ((list = next_option(list, &filename_vec, NULL)) != NULL) { + + // Ignore too long entries that may overflow path buffer + if (filename_vec.len > (int) (path_len - (n + 2))) + continue; + + // Prepare full path to the index file + strncpy(path + n + 1, filename_vec.ptr, filename_vec.len); + path[n + 1 + filename_vec.len] = '\0'; + + //DBG(("[%s]", path)); + + // Does it exist? + if (!stat(path, &st)) { + // Yes it does, break the loop + *stp = st; + found = 1; + break; + } + } + + // If no index file exists, restore directory path + if (!found) { + path[n] = '\0'; + } + + return found; +} + +static int parse_range_header(const char *header, int64_t *a, int64_t *b) { + return sscanf(header, "bytes=%" INT64_FMT "-%" INT64_FMT, a, b); +} + +static void gmt_time_string(char *buf, size_t buf_len, time_t *t) { + strftime(buf, buf_len, "%a, %d %b %Y %H:%M:%S GMT", gmtime(t)); +} + +static void open_file_endpoint(struct connection *conn, const char *path, + file_stat_t *st) { + char date[64], lm[64], etag[64], range[64], headers[500]; + const char *msg = "OK", *hdr; + time_t curtime = time(NULL); + int64_t r1, r2; + struct vec mime_vec; + int n; + + conn->endpoint_type = EP_FILE; + ns_set_close_on_exec(conn->endpoint.fd); + conn->mg_conn.status_code = 200; + + get_mime_type(conn->server, path, &mime_vec); + conn->cl = st->st_size; + range[0] = '\0'; + + // If Range: header specified, act accordingly + r1 = r2 = 0; + hdr = mg_get_header(&conn->mg_conn, "Range"); + if (hdr != NULL && (n = parse_range_header(hdr, &r1, &r2)) > 0 && + r1 >= 0 && r2 >= 0) { + conn->mg_conn.status_code = 206; + conn->cl = n == 2 ? (r2 > conn->cl ? conn->cl : r2) - r1 + 1: conn->cl - r1; + mg_snprintf(range, sizeof(range), "Content-Range: bytes " + "%" INT64_FMT "-%" INT64_FMT "/%" INT64_FMT "\r\n", + r1, r1 + conn->cl - 1, (int64_t) st->st_size); + msg = "Partial Content"; + lseek(conn->endpoint.fd, r1, SEEK_SET); + } + + // Prepare Etag, Date, Last-Modified headers. Must be in UTC, according to + // http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.3 + gmt_time_string(date, sizeof(date), &curtime); + gmt_time_string(lm, sizeof(lm), &st->st_mtime); + construct_etag(etag, sizeof(etag), st); + + n = mg_snprintf(headers, sizeof(headers), + "HTTP/1.1 %d %s\r\n" + "Date: %s\r\n" + "Last-Modified: %s\r\n" + "Etag: %s\r\n" + "Content-Type: %.*s\r\n" + "Content-Length: %" INT64_FMT "\r\n" + "Connection: %s\r\n" + "Accept-Ranges: bytes\r\n" + "%s%s\r\n", + conn->mg_conn.status_code, msg, date, lm, etag, + (int) mime_vec.len, mime_vec.ptr, conn->cl, + suggest_connection_header(&conn->mg_conn), + range, MONGOOSE_USE_EXTRA_HTTP_HEADERS); + ns_send(conn->ns_conn, headers, n); + + if (!strcmp(conn->mg_conn.request_method, "HEAD")) { + conn->ns_conn->flags |= NSF_FINISHED_SENDING_DATA; + close(conn->endpoint.fd); + conn->endpoint_type = EP_NONE; + } +} +#endif // MONGOOSE_NO_FILESYSTEM + +static void call_request_handler_if_data_is_buffered(struct connection *conn) { + struct iobuf *loc = &conn->ns_conn->recv_iobuf; + struct mg_connection *c = &conn->mg_conn; + +#ifndef MONGOOSE_NO_WEBSOCKET + if (conn->mg_conn.is_websocket) { + do { } while (deliver_websocket_frame(conn)); + } else +#endif + if ((size_t) loc->len >= c->content_len && + call_request_handler(conn) == MG_FALSE) { + open_local_endpoint(conn, 1); + } +} + +#if !defined(MONGOOSE_NO_DIRECTORY_LISTING) || !defined(MONGOOSE_NO_DAV) + +#ifdef _WIN32 +struct dirent { + char d_name[MAX_PATH_SIZE]; }; -const char *mg_get_builtin_mime_type(const char *path) { - const char *ext; - size_t i, path_len; +typedef struct DIR { + HANDLE handle; + WIN32_FIND_DATAW info; + struct dirent result; +} DIR; - path_len = strlen(path); +// Implementation of POSIX opendir/closedir/readdir for Windows. +static DIR *opendir(const char *name) { + DIR *dir = NULL; + wchar_t wpath[MAX_PATH_SIZE]; + DWORD attrs; + + if (name == NULL) { + SetLastError(ERROR_BAD_ARGUMENTS); + } else if ((dir = (DIR *) malloc(sizeof(*dir))) == NULL) { + SetLastError(ERROR_NOT_ENOUGH_MEMORY); + } else { + to_wchar(name, wpath, ARRAY_SIZE(wpath)); + attrs = GetFileAttributesW(wpath); + if (attrs != 0xFFFFFFFF && + ((attrs & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY)) { + (void) wcscat(wpath, L"\\*"); + dir->handle = FindFirstFileW(wpath, &dir->info); + dir->result.d_name[0] = '\0'; + } else { + free(dir); + dir = NULL; + } + } + + return dir; +} - for (i = 0; builtin_mime_types[i].extension != NULL; i++) { - ext = path + (path_len - builtin_mime_types[i].ext_len); - if (path_len > builtin_mime_types[i].ext_len && - mg_strcasecmp(ext, builtin_mime_types[i].extension) == 0) { - return builtin_mime_types[i].mime_type; - } - } +static int closedir(DIR *dir) { + int result = 0; + + if (dir != NULL) { + if (dir->handle != INVALID_HANDLE_VALUE) + result = FindClose(dir->handle) ? 0 : -1; + + free(dir); + } else { + result = -1; + SetLastError(ERROR_BAD_ARGUMENTS); + } - return "text/plain"; + return result; } -// Look at the "path" extension and figure what mime type it has. -// Store mime type in the vector. -static void get_mime_type(struct mg_context *ctx, const char *path, - struct vec *vec) { - struct vec ext_vec, mime_vec; - const char *list, *ext; - size_t path_len; - - path_len = strlen(path); - - // Scan user-defined mime types first, in case user wants to - // override default mime types. - list = ctx->config[EXTRA_MIME_TYPES]; - while ((list = next_option(list, &ext_vec, &mime_vec)) != NULL) { - // ext now points to the path suffix - ext = path + path_len - ext_vec.len; - if (mg_strncasecmp(ext, ext_vec.ptr, ext_vec.len) == 0) { - *vec = mime_vec; - return; - } - } - - vec->ptr = mg_get_builtin_mime_type(path); - vec->len = strlen(vec->ptr); +static struct dirent *readdir(DIR *dir) { + struct dirent *result = 0; + + if (dir) { + if (dir->handle != INVALID_HANDLE_VALUE) { + result = &dir->result; + (void) WideCharToMultiByte(CP_UTF8, 0, + dir->info.cFileName, -1, result->d_name, + sizeof(result->d_name), NULL, NULL); + + if (!FindNextFileW(dir->handle, &dir->info)) { + (void) FindClose(dir->handle); + dir->handle = INVALID_HANDLE_VALUE; + } + + } else { + SetLastError(ERROR_FILE_NOT_FOUND); + } + } else { + SetLastError(ERROR_BAD_ARGUMENTS); + } + + return result; +} +#endif // _WIN32 POSIX opendir/closedir/readdir implementation + +static int scan_directory(struct connection *conn, const char *dir, + struct dir_entry **arr) { + char path[MAX_PATH_SIZE]; + struct dir_entry *p; + struct dirent *dp; + int arr_size = 0, arr_ind = 0, inc = 100; + DIR *dirp; + + *arr = NULL; + if ((dirp = (opendir(dir))) == NULL) return 0; + + while ((dp = readdir(dirp)) != NULL) { + // Do not show current dir and hidden files + if (!strcmp(dp->d_name, ".") || + !strcmp(dp->d_name, "..") || + must_hide_file(conn, dp->d_name)) { + continue; + } + mg_snprintf(path, sizeof(path), "%s%c%s", dir, '/', dp->d_name); + + // Resize the array if nesessary + if (arr_ind >= arr_size) { + if ((p = (struct dir_entry *) + realloc(*arr, (inc + arr_size) * sizeof(**arr))) != NULL) { + // Memset new chunk to zero, otherwize st_mtime will have garbage which + // can make strftime() segfault, see + // http://code.google.com/p/mongoose/issues/detail?id=79 + memset(p + arr_size, 0, sizeof(**arr) * inc); + + *arr = p; + arr_size += inc; + } + } + + if (arr_ind < arr_size) { + (*arr)[arr_ind].conn = conn; + (*arr)[arr_ind].file_name = strdup(dp->d_name); + stat(path, &(*arr)[arr_ind].st); + arr_ind++; + } + } + closedir(dirp); + + return arr_ind; +} + +int mg_url_encode(const char *src, size_t s_len, char *dst, size_t dst_len) { + static const char *dont_escape = "._-$,;~()"; + static const char *hex = "0123456789abcdef"; + size_t i = 0, j = 0; + + for (i = j = 0; dst_len > 0 && i < s_len && j < dst_len - 1; i++, j++) { + if (isalnum(* (const unsigned char *) (src + i)) || + strchr(dont_escape, * (const unsigned char *) (src + i)) != NULL) { + dst[j] = src[i]; + } else if (j + 3 < dst_len) { + dst[j] = '%'; + dst[j + 1] = hex[(* (const unsigned char *) (src + i)) >> 4]; + dst[j + 2] = hex[(* (const unsigned char *) (src + i)) & 0xf]; + j += 2; + } + } + + dst[j] = '\0'; + return j; +} +#endif // !NO_DIRECTORY_LISTING || !MONGOOSE_NO_DAV + +#ifndef MONGOOSE_NO_DIRECTORY_LISTING + +static void print_dir_entry(const struct dir_entry *de) { + char size[64], mod[64], href[MAX_PATH_SIZE * 3]; + int64_t fsize = de->st.st_size; + int is_dir = S_ISDIR(de->st.st_mode); + const char *slash = is_dir ? "/" : ""; + + if (is_dir) { + mg_snprintf(size, sizeof(size), "%s", "[DIRECTORY]"); + } else { + // We use (signed) cast below because MSVC 6 compiler cannot + // convert unsigned __int64 to double. + if (fsize < 1024) { + mg_snprintf(size, sizeof(size), "%d", (int) fsize); + } else if (fsize < 0x100000) { + mg_snprintf(size, sizeof(size), "%.1fk", (double) fsize / 1024.0); + } else if (fsize < 0x40000000) { + mg_snprintf(size, sizeof(size), "%.1fM", (double) fsize / 1048576); + } else { + mg_snprintf(size, sizeof(size), "%.1fG", (double) fsize / 1073741824); + } + } + strftime(mod, sizeof(mod), "%d-%b-%Y %H:%M", localtime(&de->st.st_mtime)); + mg_url_encode(de->file_name, strlen(de->file_name), href, sizeof(href)); + mg_printf_data(&de->conn->mg_conn, + "<tr><td><a href=\"%s%s\">%s%s</a></td>" + "<td> %s</td><td> %s</td></tr>\n", + href, slash, de->file_name, slash, mod, size); +} + +// Sort directory entries by size, or name, or modification time. +// On windows, __cdecl specification is needed in case if project is built +// with __stdcall convention. qsort always requires __cdels callback. +static int __cdecl compare_dir_entries(const void *p1, const void *p2) { + const struct dir_entry *a = (const struct dir_entry *) p1, + *b = (const struct dir_entry *) p2; + const char *qs = a->conn->mg_conn.query_string ? + a->conn->mg_conn.query_string : "na"; + int cmp_result = 0; + + if (S_ISDIR(a->st.st_mode) && !S_ISDIR(b->st.st_mode)) { + return -1; // Always put directories on top + } else if (!S_ISDIR(a->st.st_mode) && S_ISDIR(b->st.st_mode)) { + return 1; // Always put directories on top + } else if (*qs == 'n') { + cmp_result = strcmp(a->file_name, b->file_name); + } else if (*qs == 's') { + cmp_result = a->st.st_size == b->st.st_size ? 0 : + a->st.st_size > b->st.st_size ? 1 : -1; + } else if (*qs == 'd') { + cmp_result = a->st.st_mtime == b->st.st_mtime ? 0 : + a->st.st_mtime > b->st.st_mtime ? 1 : -1; + } + + return qs[1] == 'd' ? -cmp_result : cmp_result; +} + +static void send_directory_listing(struct connection *conn, const char *dir) { + struct dir_entry *arr = NULL; + int i, num_entries, sort_direction = conn->mg_conn.query_string != NULL && + conn->mg_conn.query_string[1] == 'd' ? 'a' : 'd'; + + mg_send_header(&conn->mg_conn, "Transfer-Encoding", "chunked"); + mg_send_header(&conn->mg_conn, "Content-Type", "text/html; charset=utf-8"); + + mg_printf_data(&conn->mg_conn, + "<html><head><title>Index of %s</title>" + "<style>th {text-align: left;}</style></head>" + "<body><h1>Index of %s</h1><pre><table cellpadding=\"0\">" + "<tr><th><a href=\"?n%c\">Name</a></th>" + "<th><a href=\"?d%c\">Modified</a></th>" + "<th><a href=\"?s%c\">Size</a></th></tr>" + "<tr><td colspan=\"3\"><hr></td></tr>", + conn->mg_conn.uri, conn->mg_conn.uri, + sort_direction, sort_direction, sort_direction); + + num_entries = scan_directory(conn, dir, &arr); + qsort(arr, num_entries, sizeof(arr[0]), compare_dir_entries); + for (i = 0; i < num_entries; i++) { + print_dir_entry(&arr[i]); + free(arr[i].file_name); + } + free(arr); + + write_terminating_chunk(conn); + close_local_endpoint(conn); +} +#endif // MONGOOSE_NO_DIRECTORY_LISTING + +#ifndef MONGOOSE_NO_DAV +static void print_props(struct connection *conn, const char *uri, + file_stat_t *stp) { + char mtime[64]; + + gmt_time_string(mtime, sizeof(mtime), &stp->st_mtime); + mg_printf(&conn->mg_conn, + "<d:response>" + "<d:href>%s</d:href>" + "<d:propstat>" + "<d:prop>" + "<d:resourcetype>%s</d:resourcetype>" + "<d:getcontentlength>%" INT64_FMT "</d:getcontentlength>" + "<d:getlastmodified>%s</d:getlastmodified>" + "</d:prop>" + "<d:status>HTTP/1.1 200 OK</d:status>" + "</d:propstat>" + "</d:response>\n", + uri, S_ISDIR(stp->st_mode) ? "<d:collection/>" : "", + (int64_t) stp->st_size, mtime); +} + +static void handle_propfind(struct connection *conn, const char *path, + file_stat_t *stp, int exists) { + static const char header[] = "HTTP/1.1 207 Multi-Status\r\n" + "Connection: close\r\n" + "Content-Type: text/xml; charset=utf-8\r\n\r\n" + "<?xml version=\"1.0\" encoding=\"utf-8\"?>" + "<d:multistatus xmlns:d='DAV:'>\n"; + static const char footer[] = "</d:multistatus>"; + const char *depth = mg_get_header(&conn->mg_conn, "Depth"), + *list_dir = conn->server->config_options[ENABLE_DIRECTORY_LISTING]; + + conn->mg_conn.status_code = 207; + + // Print properties for the requested resource itself + if (!exists) { + conn->mg_conn.status_code = 404; + mg_printf(&conn->mg_conn, "%s", "HTTP/1.1 404 Not Found\r\n\r\n"); + } else if (S_ISDIR(stp->st_mode) && mg_strcasecmp(list_dir, "yes") != 0) { + conn->mg_conn.status_code = 403; + mg_printf(&conn->mg_conn, "%s", + "HTTP/1.1 403 Directory Listing Denied\r\n\r\n"); + } else { + ns_send(conn->ns_conn, header, sizeof(header) - 1); + print_props(conn, conn->mg_conn.uri, stp); + + if (S_ISDIR(stp->st_mode) && + (depth == NULL || strcmp(depth, "0") != 0)) { + struct dir_entry *arr = NULL; + int i, num_entries = scan_directory(conn, path, &arr); + + for (i = 0; i < num_entries; i++) { + char buf[MAX_PATH_SIZE * 3]; + struct dir_entry *de = &arr[i]; + mg_url_encode(de->file_name, strlen(de->file_name), buf, sizeof(buf)); + print_props(conn, buf, &de->st); + } + } + ns_send(conn->ns_conn, footer, sizeof(footer) - 1); + } + + close_local_endpoint(conn); +} + +static void handle_mkcol(struct connection *conn, const char *path) { + int status_code = 500; + + if (conn->mg_conn.content_len > 0) { + status_code = 415; + } else if (!mkdir(path, 0755)) { + status_code = 201; + } else if (errno == EEXIST) { + status_code = 405; + } else if (errno == EACCES) { + status_code = 403; + } else if (errno == ENOENT) { + status_code = 409; + } + send_http_error(conn, status_code, NULL); +} + +static int remove_directory(const char *dir) { + char path[MAX_PATH_SIZE]; + struct dirent *dp; + file_stat_t st; + DIR *dirp; + + if ((dirp = opendir(dir)) == NULL) return 0; + + while ((dp = readdir(dirp)) != NULL) { + if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) continue; + mg_snprintf(path, sizeof(path), "%s%c%s", dir, '/', dp->d_name); + stat(path, &st); + if (S_ISDIR(st.st_mode)) { + remove_directory(path); + } else { + remove(path); + } + } + closedir(dirp); + rmdir(dir); + + return 1; +} + +static void handle_delete(struct connection *conn, const char *path) { + file_stat_t st; + + if (stat(path, &st) != 0) { + send_http_error(conn, 404, NULL); + } else if (S_ISDIR(st.st_mode)) { + remove_directory(path); + send_http_error(conn, 204, NULL); + } else if (remove(path) == 0) { + send_http_error(conn, 204, NULL); + } else { + send_http_error(conn, 423, NULL); + } } -static int is_big_endian(void) { - static const int n = 1; - return ((char *) &n)[0] == 0; +// For a given PUT path, create all intermediate subdirectories +// for given path. Return 0 if the path itself is a directory, +// or -1 on error, 1 if OK. +static int put_dir(const char *path) { + char buf[MAX_PATH_SIZE]; + const char *s, *p; + file_stat_t st; + + // Create intermediate directories if they do not exist + for (s = p = path + 1; (p = strchr(s, '/')) != NULL; s = ++p) { + if (p - path >= (int) sizeof(buf)) return -1; // Buffer overflow + memcpy(buf, path, p - path); + buf[p - path] = '\0'; + if (stat(buf, &st) != 0 && mkdir(buf, 0755) != 0) return -1; + if (p[1] == '\0') return 0; // Path is a directory itself + } + + return 1; +} + +static void handle_put(struct connection *conn, const char *path) { + file_stat_t st; + const char *range, *cl_hdr = mg_get_header(&conn->mg_conn, "Content-Length"); + int64_t r1, r2; + int rc; + + conn->mg_conn.status_code = !stat(path, &st) ? 200 : 201; + if ((rc = put_dir(path)) == 0) { + mg_printf(&conn->mg_conn, "HTTP/1.1 %d OK\r\n\r\n", + conn->mg_conn.status_code); + close_local_endpoint(conn); + } else if (rc == -1) { + send_http_error(conn, 500, "put_dir: %s", strerror(errno)); + } else if (cl_hdr == NULL) { + send_http_error(conn, 411, NULL); +#ifdef _WIN32 + //On Windows, open() is a macro with 2 params + } else if ((conn->endpoint.fd = + open(path, O_RDWR | O_CREAT | O_TRUNC)) < 0) { +#else + } else if ((conn->endpoint.fd = + open(path, O_RDWR | O_CREAT | O_TRUNC, 0644)) < 0) { +#endif + send_http_error(conn, 500, "open(%s): %s", path, strerror(errno)); + } else { + DBG(("PUT [%s] %zu", path, conn->ns_conn->recv_iobuf.len)); + conn->endpoint_type = EP_PUT; + ns_set_close_on_exec(conn->endpoint.fd); + range = mg_get_header(&conn->mg_conn, "Content-Range"); + conn->cl = to64(cl_hdr); + r1 = r2 = 0; + if (range != NULL && parse_range_header(range, &r1, &r2) > 0) { + conn->mg_conn.status_code = 206; + lseek(conn->endpoint.fd, r1, SEEK_SET); + conn->cl = r2 > r1 ? r2 - r1 + 1: conn->cl - r1; + } + mg_printf(&conn->mg_conn, "HTTP/1.1 %d OK\r\nContent-Length: 0\r\n\r\n", + conn->mg_conn.status_code); + } +} + +static void forward_put_data(struct connection *conn) { + struct iobuf *io = &conn->ns_conn->recv_iobuf; + size_t k = conn->cl < (int64_t) io->len ? conn->cl : io->len; // To write + int n = write(conn->endpoint.fd, io->buf, k); // Write them! + if (n > 0) { + iobuf_remove(io, n); + conn->cl -= n; + } + if (conn->cl <= 0) { + close_local_endpoint(conn); + } +} +#endif // MONGOOSE_NO_DAV + +static void send_options(struct connection *conn) { + conn->mg_conn.status_code = 200; + mg_printf(&conn->mg_conn, "%s", + "HTTP/1.1 200 OK\r\nAllow: GET, POST, HEAD, CONNECT, PUT, " + "DELETE, OPTIONS, PROPFIND, MKCOL\r\nDAV: 1\r\n\r\n"); + close_local_endpoint(conn); +} + +#ifndef MONGOOSE_NO_AUTH +void mg_send_digest_auth_request(struct mg_connection *c) { + struct connection *conn = MG_CONN_2_CONN(c); + c->status_code = 401; + mg_printf(c, + "HTTP/1.1 401 Unauthorized\r\n" + "WWW-Authenticate: Digest qop=\"auth\", " + "realm=\"%s\", nonce=\"%lu\"\r\n\r\n", + conn->server->config_options[AUTH_DOMAIN], + (unsigned long) time(NULL)); + close_local_endpoint(conn); } -#ifndef HAVE_MD5 +// Use the global passwords file, if specified by auth_gpass option, +// or search for .htpasswd in the requested directory. +static FILE *open_auth_file(struct connection *conn, const char *path) { + char name[MAX_PATH_SIZE]; + const char *p, *gpass = conn->server->config_options[GLOBAL_AUTH_FILE]; + file_stat_t st; + FILE *fp = NULL; + + if (gpass != NULL) { + // Use global passwords file + fp = fopen(gpass, "r"); + } else if (!stat(path, &st) && S_ISDIR(st.st_mode)) { + mg_snprintf(name, sizeof(name), "%s%c%s", path, '/', PASSWORDS_FILE_NAME); + fp = fopen(name, "r"); + } else { + // Try to find .htpasswd in requested directory. + if ((p = strrchr(path, '/')) == NULL) p = path; + mg_snprintf(name, sizeof(name), "%.*s%c%s", + (int) (p - path), path, '/', PASSWORDS_FILE_NAME); + fp = fopen(name, "r"); + } + + return fp; +} + +#if !defined(HAVE_MD5) && !defined(MONGOOSE_NO_AUTH) typedef struct MD5Context { - uint32_t buf[4]; - uint32_t bits[2]; - unsigned char in[64]; + uint32_t buf[4]; + uint32_t bits[2]; + unsigned char in[64]; } MD5_CTX; static void byteReverse(unsigned char *buf, unsigned longs) { - uint32_t t; + uint32_t t; - // Forrest: MD5 expect LITTLE_ENDIAN, swap if BIG_ENDIAN - if (is_big_endian()) { - do { - t = (uint32_t) ((unsigned) buf[3] << 8 | buf[2]) << 16 | - ((unsigned) buf[1] << 8 | buf[0]); - * (uint32_t *) buf = t; - buf += 4; - } while (--longs); - } + // Forrest: MD5 expect LITTLE_ENDIAN, swap if BIG_ENDIAN + if (is_big_endian()) { + do { + t = (uint32_t) ((unsigned) buf[3] << 8 | buf[2]) << 16 | + ((unsigned) buf[1] << 8 | buf[0]); + * (uint32_t *) buf = t; + buf += 4; + } while (--longs); + } } #define F1(x, y, z) (z ^ (x & (y ^ z))) @@ -2085,3322 +3513,1474 @@ static void byteReverse(unsigned char *buf, unsigned longs) { #define F4(x, y, z) (y ^ (x | ~z)) #define MD5STEP(f, w, x, y, z, data, s) \ - ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x ) + ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x ) // Start MD5 accumulation. Set bit count to 0 and buffer to mysterious // initialization constants. static void MD5Init(MD5_CTX *ctx) { - ctx->buf[0] = 0x67452301; - ctx->buf[1] = 0xefcdab89; - ctx->buf[2] = 0x98badcfe; - ctx->buf[3] = 0x10325476; + ctx->buf[0] = 0x67452301; + ctx->buf[1] = 0xefcdab89; + ctx->buf[2] = 0x98badcfe; + ctx->buf[3] = 0x10325476; - ctx->bits[0] = 0; - ctx->bits[1] = 0; + ctx->bits[0] = 0; + ctx->bits[1] = 0; } static void MD5Transform(uint32_t buf[4], uint32_t const in[16]) { - register uint32_t a, b, c, d; - - a = buf[0]; - b = buf[1]; - c = buf[2]; - d = buf[3]; - - MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7); - MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12); - MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17); - MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22); - MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7); - MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12); - MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17); - MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22); - MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7); - MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12); - MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17); - MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22); - MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7); - MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12); - MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17); - MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22); - - MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5); - MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9); - MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14); - MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20); - MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5); - MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9); - MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14); - MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20); - MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5); - MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9); - MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14); - MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20); - MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5); - MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9); - MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14); - MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); - - MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4); - MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11); - MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16); - MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23); - MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4); - MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11); - MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16); - MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23); - MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4); - MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11); - MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16); - MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23); - MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4); - MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11); - MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); - MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23); - - MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6); - MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10); - MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15); - MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21); - MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6); - MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10); - MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15); - MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21); - MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6); - MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); - MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15); - MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21); - MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6); - MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10); - MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15); - MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21); - - buf[0] += a; - buf[1] += b; - buf[2] += c; - buf[3] += d; + register uint32_t a, b, c, d; + + a = buf[0]; + b = buf[1]; + c = buf[2]; + d = buf[3]; + + MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7); + MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12); + MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17); + MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22); + MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7); + MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12); + MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17); + MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22); + MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7); + MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12); + MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17); + MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22); + MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7); + MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12); + MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17); + MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22); + + MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5); + MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9); + MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14); + MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20); + MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5); + MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9); + MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14); + MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20); + MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5); + MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9); + MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14); + MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20); + MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5); + MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9); + MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14); + MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); + + MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4); + MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11); + MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16); + MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23); + MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4); + MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11); + MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16); + MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23); + MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4); + MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11); + MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16); + MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23); + MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4); + MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11); + MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); + MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23); + + MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6); + MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10); + MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15); + MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21); + MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6); + MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10); + MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15); + MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21); + MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6); + MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); + MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15); + MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21); + MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6); + MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10); + MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15); + MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21); + + buf[0] += a; + buf[1] += b; + buf[2] += c; + buf[3] += d; } static void MD5Update(MD5_CTX *ctx, unsigned char const *buf, unsigned len) { - uint32_t t; + uint32_t t; - t = ctx->bits[0]; - if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t) - ctx->bits[1]++; - ctx->bits[1] += len >> 29; + t = ctx->bits[0]; + if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t) + ctx->bits[1]++; + ctx->bits[1] += len >> 29; - t = (t >> 3) & 0x3f; + t = (t >> 3) & 0x3f; - if (t) { - unsigned char *p = (unsigned char *) ctx->in + t; + if (t) { + unsigned char *p = (unsigned char *) ctx->in + t; - t = 64 - t; - if (len < t) { - memcpy(p, buf, len); - return; - } - memcpy(p, buf, t); - byteReverse(ctx->in, 16); - MD5Transform(ctx->buf, (uint32_t *) ctx->in); - buf += t; - len -= t; - } + t = 64 - t; + if (len < t) { + memcpy(p, buf, len); + return; + } + memcpy(p, buf, t); + byteReverse(ctx->in, 16); + MD5Transform(ctx->buf, (uint32_t *) ctx->in); + buf += t; + len -= t; + } - while (len >= 64) { - memcpy(ctx->in, buf, 64); - byteReverse(ctx->in, 16); - MD5Transform(ctx->buf, (uint32_t *) ctx->in); - buf += 64; - len -= 64; - } + while (len >= 64) { + memcpy(ctx->in, buf, 64); + byteReverse(ctx->in, 16); + MD5Transform(ctx->buf, (uint32_t *) ctx->in); + buf += 64; + len -= 64; + } - memcpy(ctx->in, buf, len); + memcpy(ctx->in, buf, len); } static void MD5Final(unsigned char digest[16], MD5_CTX *ctx) { - unsigned count; - unsigned char *p; - uint32_t *a; - - count = (ctx->bits[0] >> 3) & 0x3F; - - p = ctx->in + count; - *p++ = 0x80; - count = 64 - 1 - count; - if (count < 8) { - memset(p, 0, count); - byteReverse(ctx->in, 16); - MD5Transform(ctx->buf, (uint32_t *) ctx->in); - memset(ctx->in, 0, 56); - } else { - memset(p, 0, count - 8); - } - byteReverse(ctx->in, 14); - - a = (uint32_t *)ctx->in; - a[14] = ctx->bits[0]; - a[15] = ctx->bits[1]; - - MD5Transform(ctx->buf, (uint32_t *) ctx->in); - byteReverse((unsigned char *) ctx->buf, 4); - memcpy(digest, ctx->buf, 16); - memset((char *) ctx, 0, sizeof(*ctx)); + unsigned count; + unsigned char *p; + uint32_t *a; + + count = (ctx->bits[0] >> 3) & 0x3F; + + p = ctx->in + count; + *p++ = 0x80; + count = 64 - 1 - count; + if (count < 8) { + memset(p, 0, count); + byteReverse(ctx->in, 16); + MD5Transform(ctx->buf, (uint32_t *) ctx->in); + memset(ctx->in, 0, 56); + } else { + memset(p, 0, count - 8); + } + byteReverse(ctx->in, 14); + + a = (uint32_t *)ctx->in; + a[14] = ctx->bits[0]; + a[15] = ctx->bits[1]; + + MD5Transform(ctx->buf, (uint32_t *) ctx->in); + byteReverse((unsigned char *) ctx->buf, 4); + memcpy(digest, ctx->buf, 16); + memset((char *) ctx, 0, sizeof(*ctx)); } #endif // !HAVE_MD5 + + // Stringify binary data. Output buffer must be twice as big as input, // because each byte takes 2 bytes in string representation static void bin2str(char *to, const unsigned char *p, size_t len) { - static const char *hex = "0123456789abcdef"; + static const char *hex = "0123456789abcdef"; - for (; len--; p++) { - *to++ = hex[p[0] >> 4]; - *to++ = hex[p[0] & 0x0f]; - } - *to = '\0'; + for (; len--; p++) { + *to++ = hex[p[0] >> 4]; + *to++ = hex[p[0] & 0x0f]; + } + *to = '\0'; } // Return stringified MD5 hash for list of strings. Buffer must be 33 bytes. char *mg_md5(char buf[33], ...) { - unsigned char hash[16]; - const char *p; - va_list ap; - MD5_CTX ctx; + unsigned char hash[16]; + const char *p; + va_list ap; + MD5_CTX ctx; - MD5Init(&ctx); + MD5Init(&ctx); - va_start(ap, buf); - while ((p = va_arg(ap, const char *)) != NULL) { - MD5Update(&ctx, (const unsigned char *) p, (unsigned) strlen(p)); - } - va_end(ap); + va_start(ap, buf); + while ((p = va_arg(ap, const char *)) != NULL) { + MD5Update(&ctx, (const unsigned char *) p, (unsigned) strlen(p)); + } + va_end(ap); - MD5Final(hash, &ctx); - bin2str(buf, hash, sizeof(hash)); - return buf; + MD5Final(hash, &ctx); + bin2str(buf, hash, sizeof(hash)); + return buf; } // Check the user's password, return 1 if OK static int check_password(const char *method, const char *ha1, const char *uri, - const char *nonce, const char *nc, const char *cnonce, - const char *qop, const char *response) { - char ha2[32 + 1], expected_response[32 + 1]; - - // Some of the parameters may be NULL - if (method == NULL || nonce == NULL || nc == NULL || cnonce == NULL || - qop == NULL || response == NULL) { - return 0; - } - - // NOTE(lsm): due to a bug in MSIE, we do not compare the URI - // TODO(lsm): check for authentication timeout - if (// strcmp(dig->uri, c->ouri) != 0 || - strlen(response) != 32 - // || now - strtoul(dig->nonce, NULL, 10) > 3600 - ) { - return 0; - } + const char *nonce, const char *nc, const char *cnonce, + const char *qop, const char *response) { + char ha2[32 + 1], expected_response[32 + 1]; + +#if 0 + // Check for authentication timeout + if ((unsigned long) time(NULL) - (unsigned long) to64(nonce) > 3600 * 2) { + return 0; + } +#endif - mg_md5(ha2, method, ":", uri, NULL); - mg_md5(expected_response, ha1, ":", nonce, ":", nc, - ":", cnonce, ":", qop, ":", ha2, NULL); + mg_md5(ha2, method, ":", uri, NULL); + mg_md5(expected_response, ha1, ":", nonce, ":", nc, + ":", cnonce, ":", qop, ":", ha2, NULL); - return mg_strcasecmp(response, expected_response) == 0; + return mg_strcasecmp(response, expected_response) == 0 ? MG_TRUE : MG_FALSE; } -// Use the global passwords file, if specified by auth_gpass option, -// or search for .htpasswd in the requested directory. -static void open_auth_file(struct mg_connection *conn, const char *path, - struct file *filep) { - char name[PATH_MAX]; - const char *p, *e, *gpass = conn->ctx->config[GLOBAL_PASSWORDS_FILE]; - struct file file = STRUCT_FILE_INITIALIZER; - - if (gpass != NULL) { - // Use global passwords file - if (!mg_fopen(conn, gpass, "r", filep)) { - cry(conn, "fopen(%s): %s", gpass, strerror(ERRNO)); - } - // Important: using local struct file to test path for is_directory flag. - // If filep is used, mg_stat() makes it appear as if auth file was opened. - } else if (mg_stat(conn, path, &file) && file.is_directory) { - mg_snprintf(conn, name, sizeof(name), "%s%c%s", - path, '/', PASSWORDS_FILE_NAME); - mg_fopen(conn, name, "r", filep); - } else { - // Try to find .htpasswd in requested directory. - for (p = path, e = p + strlen(p) - 1; e > p; e--) - if (e[0] == '/') - break; - mg_snprintf(conn, name, sizeof(name), "%.*s%c%s", - (int) (e - p), p, '/', PASSWORDS_FILE_NAME); - mg_fopen(conn, name, "r", filep); - } -} - -// Parsed Authorization header -struct ah { - char *user, *uri, *cnonce, *response, *qop, *nc, *nonce; -}; - -// Return 1 on success. Always initializes the ah structure. -static int parse_auth_header(struct mg_connection *conn, char *buf, - size_t buf_size, struct ah *ah) { - char *name, *value, *s; - const char *auth_header; - - (void) memset(ah, 0, sizeof(*ah)); - if ((auth_header = mg_get_header(conn, "Authorization")) == NULL || - mg_strncasecmp(auth_header, "Digest ", 7) != 0) { - return 0; - } - - // Make modifiable copy of the auth header - (void) mg_strlcpy(buf, auth_header + 7, buf_size); - s = buf; - - // Parse authorization header - for (;;) { - // Gobble initial spaces - while (isspace(* (unsigned char *) s)) { - s++; - } - name = skip_quoted(&s, "=", " ", 0); - // Value is either quote-delimited, or ends at first comma or space. - if (s[0] == '\"') { - s++; - value = skip_quoted(&s, "\"", " ", '\\'); - if (s[0] == ',') { - s++; - } - } else { - value = skip_quoted(&s, ", ", " ", 0); // IE uses commas, FF uses spaces - } - if (*name == '\0') { - break; - } - - if (!strcmp(name, "username")) { - ah->user = value; - } else if (!strcmp(name, "cnonce")) { - ah->cnonce = value; - } else if (!strcmp(name, "response")) { - ah->response = value; - } else if (!strcmp(name, "uri")) { - ah->uri = value; - } else if (!strcmp(name, "qop")) { - ah->qop = value; - } else if (!strcmp(name, "nc")) { - ah->nc = value; - } else if (!strcmp(name, "nonce")) { - ah->nonce = value; - } - } - - // CGI needs it as REMOTE_USER - if (ah->user != NULL) { - conn->request_info.remote_user = mg_strdup(ah->user); - } else { - return 0; - } - - return 1; -} - -static char *mg_fgets(char *buf, size_t size, struct file *filep, char **p) { - char *eof; - size_t len; - - if (filep->membuf != NULL && *p != NULL) { - eof = (char*)memchr(*p, '\n', &filep->membuf[filep->size] - *p); - len = (size_t) (eof - *p) > size - 1 ? size - 1 : (size_t) (eof - *p); - memcpy(buf, *p, len); - buf[len] = '\0'; - *p = eof; - return eof; - } else if (filep->fp != NULL) { - return fgets(buf, size, filep->fp); - } else { - return NULL; - } -} // Authorize against the opened passwords file. Return 1 if authorized. -static int authorize(struct mg_connection *conn, struct file *filep) { - struct ah ah; - char line[256], f_user[256], ha1[256], f_domain[256], buf[MG_BUF_LEN], *p; +int mg_authorize_digest(struct mg_connection *c, FILE *fp) { + struct connection *conn = MG_CONN_2_CONN(c); + const char *hdr; + char line[256], f_user[256], ha1[256], f_domain[256], user[100], nonce[100], + uri[MAX_REQUEST_SIZE], cnonce[100], resp[100], qop[100], nc[100]; + + if (c == NULL || fp == NULL) return 0; + if ((hdr = mg_get_header(c, "Authorization")) == NULL || + mg_strncasecmp(hdr, "Digest ", 7) != 0) return 0; + if (!mg_parse_header(hdr, "username", user, sizeof(user))) return 0; + if (!mg_parse_header(hdr, "cnonce", cnonce, sizeof(cnonce))) return 0; + if (!mg_parse_header(hdr, "response", resp, sizeof(resp))) return 0; + if (!mg_parse_header(hdr, "uri", uri, sizeof(uri))) return 0; + if (!mg_parse_header(hdr, "qop", qop, sizeof(qop))) return 0; + if (!mg_parse_header(hdr, "nc", nc, sizeof(nc))) return 0; + if (!mg_parse_header(hdr, "nonce", nonce, sizeof(nonce))) return 0; + + while (fgets(line, sizeof(line), fp) != NULL) { + if (sscanf(line, "%[^:]:%[^:]:%s", f_user, f_domain, ha1) == 3 && + !strcmp(user, f_user) && + // NOTE(lsm): due to a bug in MSIE, we do not compare URIs + !strcmp(conn->server->config_options[AUTH_DOMAIN], f_domain)) + return check_password(c->request_method, ha1, uri, + nonce, nc, cnonce, qop, resp); + } + return MG_FALSE; +} - if (!parse_auth_header(conn, buf, sizeof(buf), &ah)) { - return 0; - } - // Loop over passwords file - p = (char *) filep->membuf; - while (mg_fgets(line, sizeof(line), filep, &p) != NULL) { - if (sscanf(line, "%[^:]:%[^:]:%s", f_user, f_domain, ha1) != 3) { - continue; - } +// Return 1 if request is authorised, 0 otherwise. +static int is_authorized(struct connection *conn, const char *path) { + FILE *fp; + int authorized = MG_TRUE; - if (!strcmp(ah.user, f_user) && - !strcmp(conn->ctx->config[AUTHENTICATION_DOMAIN], f_domain)) - return check_password(conn->request_info.request_method, ha1, ah.uri, - ah.nonce, ah.nc, ah.cnonce, ah.qop, ah.response); - } + if ((fp = open_auth_file(conn, path)) != NULL) { + authorized = mg_authorize_digest(&conn->mg_conn, fp); + fclose(fp); + } - return 0; + return authorized; } -// Return 1 if request is authorised, 0 otherwise. -static int check_authorization(struct mg_connection *conn, const char *path) { - char fname[PATH_MAX]; - struct vec uri_vec, filename_vec; - const char *list; - struct file file = STRUCT_FILE_INITIALIZER; - int authorized = 1; - - list = conn->ctx->config[PROTECT_URI]; - while ((list = next_option(list, &uri_vec, &filename_vec)) != NULL) { - if (!memcmp(conn->request_info.uri, uri_vec.ptr, uri_vec.len)) { - mg_snprintf(conn, fname, sizeof(fname), "%.*s", - (int) filename_vec.len, filename_vec.ptr); - if (!mg_fopen(conn, fname, "r", &file)) { - cry(conn, "%s: cannot open %s: %s", __func__, fname, strerror(errno)); - } - break; - } - } - - if (!is_file_opened(&file)) { - open_auth_file(conn, path, &file); - } - - if (is_file_opened(&file)) { - authorized = authorize(conn, &file); - mg_fclose(&file); - } - - return authorized; -} - -static void send_authorization_request(struct mg_connection *conn) { - conn->status_code = 401; - mg_printf(conn, - "HTTP/1.1 401 Unauthorized\r\n" - "Content-Length: 0\r\n" - "WWW-Authenticate: Digest qop=\"auth\", " - "realm=\"%s\", nonce=\"%lu\"\r\n\r\n", - conn->ctx->config[AUTHENTICATION_DOMAIN], - (unsigned long) time(NULL)); -} - -static int is_authorized_for_put(struct mg_connection *conn) { - struct file file = STRUCT_FILE_INITIALIZER; - const char *passfile = conn->ctx->config[PUT_DELETE_PASSWORDS_FILE]; - int ret = 0; - - if (passfile != NULL && mg_fopen(conn, passfile, "r", &file)) { - ret = authorize(conn, &file); - mg_fclose(&file); - } - - return ret; -} - -int mg_modify_passwords_file(const char *fname, const char *domain, - const char *user, const char *pass) { - int found; - char line[512], u[512], d[512], ha1[33], tmp[PATH_MAX]; - FILE *fp, *fp2; - - found = 0; - fp = fp2 = NULL; - - // Regard empty password as no password - remove user record. - if (pass != NULL && pass[0] == '\0') { - pass = NULL; - } - - (void) snprintf(tmp, sizeof(tmp), "%s.tmp", fname); - - // Create the file if does not exist - if ((fp = fopen(fname, "a+")) != NULL) { - (void) fclose(fp); - } - - // Open the given file and temporary file - if ((fp = fopen(fname, "r")) == NULL) { - return 0; - } else if ((fp2 = fopen(tmp, "w+")) == NULL) { - fclose(fp); - return 0; - } - - // Copy the stuff to temporary file - while (fgets(line, sizeof(line), fp) != NULL) { - if (sscanf(line, "%[^:]:%[^:]:%*s", u, d) != 2) { - continue; - } - - if (!strcmp(u, user) && !strcmp(d, domain)) { - found++; - if (pass != NULL) { - mg_md5(ha1, user, ":", domain, ":", pass, NULL); - fprintf(fp2, "%s:%s:%s\n", user, domain, ha1); - } - } else { - fprintf(fp2, "%s", line); - } - } - - // If new user, just add it - if (!found && pass != NULL) { - mg_md5(ha1, user, ":", domain, ":", pass, NULL); - fprintf(fp2, "%s:%s:%s\n", user, domain, ha1); - } - - // Close files - fclose(fp); - fclose(fp2); - - // Put the temp file in place of real file - remove(fname); - rename(tmp, fname); - - return 1; -} - -static int conn2(const char *host, int port, int use_ssl, - char *ebuf, size_t ebuf_len) { - struct sockaddr_in sin; - struct hostent *he; - SOCKET sock = INVALID_SOCKET; - - if (host == NULL) { - snprintf(ebuf, ebuf_len, "%s", "NULL host"); - } else if (use_ssl && SSLv23_client_method == NULL) { - snprintf(ebuf, ebuf_len, "%s", "SSL is not initialized"); - // TODO(lsm): use something threadsafe instead of gethostbyname() - } else if ((he = gethostbyname(host)) == NULL) { - snprintf(ebuf, ebuf_len, "gethostbyname(%s): %s", host, strerror(ERRNO)); - } else if ((sock = socket(PF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) { - snprintf(ebuf, ebuf_len, "socket(): %s", strerror(ERRNO)); - } else { - sin.sin_family = AF_INET; - sin.sin_port = htons((uint16_t) port); - sin.sin_addr = * (struct in_addr *) he->h_addr_list[0]; - if (connect(sock, (struct sockaddr *) &sin, sizeof(sin)) != 0) { - snprintf(ebuf, ebuf_len, "connect(%s:%d): %s", - host, port, strerror(ERRNO)); - closesocket(sock); - sock = INVALID_SOCKET; - } - } - return sock; -} - - - -void mg_url_encode(const char *src, char *dst, size_t dst_len) { - static const char *dont_escape = "._-$,;~()"; - static const char *hex = "0123456789abcdef"; - const char *end = dst + dst_len - 1; - - for (; *src != '\0' && dst < end; src++, dst++) { - if (isalnum(*(const unsigned char *) src) || - strchr(dont_escape, * (const unsigned char *) src) != NULL) { - *dst = *src; - } else if (dst + 2 < end) { - dst[0] = '%'; - dst[1] = hex[(* (const unsigned char *) src) >> 4]; - dst[2] = hex[(* (const unsigned char *) src) & 0xf]; - dst += 2; - } - } - - *dst = '\0'; -} - -static void print_dir_entry(struct de *de) { - char size[64], mod[64], href[PATH_MAX]; - - if (de->file.is_directory) { - mg_snprintf(de->conn, size, sizeof(size), "%s", "[DIRECTORY]"); - } else { - // We use (signed) cast below because MSVC 6 compiler cannot - // convert unsigned __int64 to double. Sigh. - if (de->file.size < 1024) { - mg_snprintf(de->conn, size, sizeof(size), "%d", (int) de->file.size); - } else if (de->file.size < 0x100000) { - mg_snprintf(de->conn, size, sizeof(size), - "%.1fk", (double) de->file.size / 1024.0); - } else if (de->file.size < 0x40000000) { - mg_snprintf(de->conn, size, sizeof(size), - "%.1fM", (double) de->file.size / 1048576); - } else { - mg_snprintf(de->conn, size, sizeof(size), - "%.1fG", (double) de->file.size / 1073741824); - } - } - strftime(mod, sizeof(mod), "%d-%b-%Y %H:%M", - localtime(&de->file.modification_time)); - mg_url_encode(de->file_name, href, sizeof(href)); - de->conn->num_bytes_sent += mg_printf(de->conn, - "<tr><td><a href=\"%s%s%s\">%s%s</a></td>" - "<td> %s</td><td> %s</td></tr>\n", - de->conn->request_info.uri, href, de->file.is_directory ? "/" : "", - de->file_name, de->file.is_directory ? "/" : "", mod, size); -} - -// This function is called from send_directory() and used for -// sorting directory entries by size, or name, or modification time. -// On windows, __cdecl specification is needed in case if project is built -// with __stdcall convention. qsort always requires __cdels callback. -static int WINCDECL compare_dir_entries(const void *p1, const void *p2) { - const struct de *a = (const struct de *) p1, *b = (const struct de *) p2; - const char *query_string = a->conn->request_info.query_string; - int cmp_result = 0; - - if (query_string == NULL) { - query_string = "na"; - } - - if (a->file.is_directory && !b->file.is_directory) { - return -1; // Always put directories on top - } else if (!a->file.is_directory && b->file.is_directory) { - return 1; // Always put directories on top - } else if (*query_string == 'n') { - cmp_result = strcmp(a->file_name, b->file_name); - } else if (*query_string == 's') { - cmp_result = a->file.size == b->file.size ? 0 : - a->file.size > b->file.size ? 1 : -1; - } else if (*query_string == 'd') { - cmp_result = a->file.modification_time == b->file.modification_time ? 0 : - a->file.modification_time > b->file.modification_time ? 1 : -1; - } - - return query_string[1] == 'd' ? -cmp_result : cmp_result; -} - -static int must_hide_file(struct mg_connection *conn, const char *path) { - const char *pw_pattern = "**" PASSWORDS_FILE_NAME "$"; - const char *pattern = conn->ctx->config[HIDE_FILES]; - return match_prefix(pw_pattern, strlen(pw_pattern), path) > 0 || - (pattern != NULL && match_prefix(pattern, strlen(pattern), path) > 0); -} - -static int scan_directory(struct mg_connection *conn, const char *dir, - void *data, void (*cb)(struct de *, void *)) { - char path[PATH_MAX]; - struct dirent *dp; - DIR *dirp; - struct de de; - - if ((dirp = opendir(dir)) == NULL) { - return 0; - } else { - de.conn = conn; - - while ((dp = readdir(dirp)) != NULL) { - // Do not show current dir and hidden files - if (!strcmp(dp->d_name, ".") || - !strcmp(dp->d_name, "..") || - must_hide_file(conn, dp->d_name)) { - continue; - } - - mg_snprintf(conn, path, sizeof(path), "%s%c%s", dir, '/', dp->d_name); - - // If we don't memset stat structure to zero, mtime will have - // garbage and strftime() will segfault later on in - // print_dir_entry(). memset is required only if mg_stat() - // fails. For more details, see - // http://code.google.com/p/mongoose/issues/detail?id=79 - memset(&de.file, 0, sizeof(de.file)); - mg_stat(conn, path, &de.file); - - de.file_name = dp->d_name; - cb(&de, data); - } - (void) closedir(dirp); - } - return 1; -} - -static int remove_directory(struct mg_connection *conn, const char *dir) { - char path[PATH_MAX]; - struct dirent *dp; - DIR *dirp; - struct de de; - - if ((dirp = opendir(dir)) == NULL) { - return 0; - } else { - de.conn = conn; - - while ((dp = readdir(dirp)) != NULL) { - // Do not show current dir (but show hidden files as they will also be removed) - if (!strcmp(dp->d_name, ".") || - !strcmp(dp->d_name, "..")) { - continue; - } - - mg_snprintf(conn, path, sizeof(path), "%s%c%s", dir, '/', dp->d_name); - - // If we don't memset stat structure to zero, mtime will have - // garbage and strftime() will segfault later on in - // print_dir_entry(). memset is required only if mg_stat() - // fails. For more details, see - // http://code.google.com/p/mongoose/issues/detail?id=79 - memset(&de.file, 0, sizeof(de.file)); - mg_stat(conn, path, &de.file); - if(de.file.modification_time) { - if(de.file.is_directory) { - remove_directory(conn, path); - } else { - mg_remove(path); - } - } - - } - (void) closedir(dirp); - - rmdir(dir); - } - - return 1; -} - -struct dir_scan_data { - struct de *entries; - int num_entries; - int arr_size; -}; +static int is_authorized_for_dav(struct connection *conn) { + const char *auth_file = conn->server->config_options[DAV_AUTH_FILE]; + const char *method = conn->mg_conn.request_method; + FILE *fp; + int authorized = MG_FALSE; -// Behaves like realloc(), but frees original pointer on failure -static void *realloc2(void *ptr, size_t size) { - void *new_ptr = realloc(ptr, size); - if (new_ptr == NULL) { - free(ptr); - } - return new_ptr; -} - -static void dir_scan_callback(struct de *de, void *data) { - struct dir_scan_data *dsd = (struct dir_scan_data *) data; - - if (dsd->entries == NULL || dsd->num_entries >= dsd->arr_size) { - dsd->arr_size *= 2; - dsd->entries = (struct de *) realloc2(dsd->entries, dsd->arr_size * - sizeof(dsd->entries[0])); - } - if (dsd->entries == NULL) { - // TODO(lsm): propagate an error to the caller - dsd->num_entries = 0; - } else { - dsd->entries[dsd->num_entries].file_name = mg_strdup(de->file_name); - dsd->entries[dsd->num_entries].file = de->file; - dsd->entries[dsd->num_entries].conn = de->conn; - dsd->num_entries++; - } -} - -static void handle_directory_request(struct mg_connection *conn, - const char *dir) { - int i, sort_direction; - struct dir_scan_data data = { NULL, 0, 128 }; - - if (!scan_directory(conn, dir, &data, dir_scan_callback)) { - send_http_error(conn, 500, "Cannot open directory", - "Error: opendir(%s): %s", dir, strerror(ERRNO)); - return; - } - - sort_direction = conn->request_info.query_string != NULL && - conn->request_info.query_string[1] == 'd' ? 'a' : 'd'; - - conn->must_close = 1; - mg_printf(conn, "%s", - "HTTP/1.1 200 OK\r\n" - "Connection: close\r\n" - "Content-Type: text/html; charset=utf-8\r\n\r\n"); - - conn->num_bytes_sent += mg_printf(conn, - "<html><head><title>Index of %s</title>" - "<style>th {text-align: left;}</style></head>" - "<body><h1>Index of %s</h1><pre><table cellpadding=\"0\">" - "<tr><th><a href=\"?n%c\">Name</a></th>" - "<th><a href=\"?d%c\">Modified</a></th>" - "<th><a href=\"?s%c\">Size</a></th></tr>" - "<tr><td colspan=\"3\"><hr></td></tr>", - conn->request_info.uri, conn->request_info.uri, - sort_direction, sort_direction, sort_direction); - - // Print first entry - link to a parent directory - conn->num_bytes_sent += mg_printf(conn, - "<tr><td><a href=\"%s%s\">%s</a></td>" - "<td> %s</td><td> %s</td></tr>\n", - conn->request_info.uri, "..", "Parent directory", "-", "-"); - - // Sort and print directory entries - qsort(data.entries, (size_t) data.num_entries, sizeof(data.entries[0]), - compare_dir_entries); - for (i = 0; i < data.num_entries; i++) { - print_dir_entry(&data.entries[i]); - free(data.entries[i].file_name); - } - free(data.entries); - - conn->num_bytes_sent += mg_printf(conn, "%s", "</table></body></html>"); - conn->status_code = 200; -} - -// Send len bytes from the opened file to the client. -static void send_file_data(struct mg_connection *conn, struct file *filep, - int64_t offset, int64_t len) { - char buf[MG_BUF_LEN]; - int to_read, num_read, num_written; - - // Sanity check the offset - offset = offset < 0 ? 0 : offset > filep->size ? filep->size : offset; - - if (len > 0 && filep->membuf != NULL && filep->size > 0) { - if (len > filep->size - offset) { - len = filep->size - offset; - } - mg_write(conn, filep->membuf + offset, (size_t) len); - } else if (len > 0 && filep->fp != NULL) { - fseeko(filep->fp, offset, SEEK_SET); - while (len > 0) { - // Calculate how much to read from the file in the buffer - to_read = sizeof(buf); - if ((int64_t) to_read > len) { - to_read = (int) len; - } - - // Read from file, exit the loop on error - if ((num_read = fread(buf, 1, (size_t) to_read, filep->fp)) <= 0) { - break; - } - - // Send read bytes to the client, exit the loop on error - if ((num_written = mg_write(conn, buf, (size_t) num_read)) != num_read) { - break; - } - - // Both read and were successful, adjust counters - conn->num_bytes_sent += num_written; - len -= num_written; - } - } -} + // If dav_auth_file is not set, allow non-authorized PROPFIND + if (method != NULL && !strcmp(method, "PROPFIND") && auth_file == NULL) { + authorized = MG_TRUE; + } else if (auth_file != NULL && (fp = fopen(auth_file, "r")) != NULL) { + authorized = mg_authorize_digest(&conn->mg_conn, fp); + fclose(fp); + } -static int parse_range_header(const char *header, int64_t *a, int64_t *b) { - return sscanf(header, "bytes=%" INT64_FMT "-%" INT64_FMT, a, b); + return authorized; } -static void gmt_time_string(char *buf, size_t buf_len, time_t *t) { - strftime(buf, buf_len, "%a, %d %b %Y %H:%M:%S GMT", gmtime(t)); +static int is_dav_request(const struct connection *conn) { + const char *s = conn->mg_conn.request_method; + return !strcmp(s, "PUT") || !strcmp(s, "DELETE") || + !strcmp(s, "MKCOL") || !strcmp(s, "PROPFIND"); } +#endif // MONGOOSE_NO_AUTH -static void construct_etag(char *buf, size_t buf_len, - const struct file *filep) { - snprintf(buf, buf_len, "\"%lx.%" INT64_FMT "\"", - (unsigned long) filep->modification_time, filep->size); -} +static int parse_header(const char *str, int str_len, const char *var_name, + char *buf, size_t buf_size) { + int ch = ' ', len = 0, n = strlen(var_name); + const char *p, *end = str + str_len, *s = NULL; -static void fclose_on_exec(struct file *filep) { - if (filep != NULL && filep->fp != NULL) { -#ifndef _WIN32 - fcntl(fileno(filep->fp), F_SETFD, FD_CLOEXEC); -#endif - } -} - -static void handle_file_request(struct mg_connection *conn, const char *path, - struct file *filep) { - char date[64], lm[64], etag[64], range[64]; - const char *msg = "OK", *hdr; - time_t curtime = time(NULL); - int64_t cl, r1, r2; - struct vec mime_vec; - int n; - char gz_path[PATH_MAX]; - char const* encoding = ""; - - get_mime_type(conn->ctx, path, &mime_vec); - cl = filep->size; - conn->status_code = 200; - range[0] = '\0'; - - // if this file is in fact a pre-gzipped file, rewrite its filename - // it's important to rewrite the filename after resolving - // the mime type from it, to preserve the actual file's type - if (filep->gzipped) { - snprintf(gz_path, sizeof(gz_path), "%s.gz", path); - path = gz_path; - encoding = "Content-Encoding: gzip\r\n"; - } - - if (!mg_fopen(conn, path, "rb", filep)) { - send_http_error(conn, 500, http_500_error, - "fopen(%s): %s", path, strerror(ERRNO)); - return; - } - - fclose_on_exec(filep); - - // If Range: header specified, act accordingly - r1 = r2 = 0; - hdr = mg_get_header(conn, "Range"); - if (hdr != NULL && (n = parse_range_header(hdr, &r1, &r2)) > 0 && - r1 >= 0 && r2 >= 0) { - // actually, range requests don't play well with a pre-gzipped - // file (since the range is specified in the uncmpressed space) - if (filep->gzipped) { - send_http_error(conn, 501, "Not Implemented", "range requests in gzipped files are not supported"); - return; - } - conn->status_code = 206; - cl = n == 2 ? (r2 > cl ? cl : r2) - r1 + 1: cl - r1; - mg_snprintf(conn, range, sizeof(range), - "Content-Range: bytes " - "%" INT64_FMT "-%" - INT64_FMT "/%" INT64_FMT "\r\n", - r1, r1 + cl - 1, filep->size); - msg = "Partial Content"; - } - - // Prepare Etag, Date, Last-Modified headers. Must be in UTC, according to - // http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.3 - gmt_time_string(date, sizeof(date), &curtime); - gmt_time_string(lm, sizeof(lm), &filep->modification_time); - construct_etag(etag, sizeof(etag), filep); - - (void) mg_printf(conn, - "HTTP/1.1 %d %s\r\n" - "Date: %s\r\n" - "Last-Modified: %s\r\n" - "Etag: %s\r\n" - "Content-Type: %.*s\r\n" - "Content-Length: %" INT64_FMT "\r\n" - "Connection: %s\r\n" - "Accept-Ranges: bytes\r\n" - "%s%s\r\n", - conn->status_code, msg, date, lm, etag, (int) mime_vec.len, - mime_vec.ptr, cl, suggest_connection_header(conn), range, encoding); - - if (strcmp(conn->request_info.request_method, "HEAD") != 0) { - send_file_data(conn, filep, r1, cl); - } - mg_fclose(filep); -} - -void mg_send_file(struct mg_connection *conn, const char *path) { - struct file file = STRUCT_FILE_INITIALIZER; - if (mg_stat(conn, path, &file)) { - handle_file_request(conn, path, &file); - } else { - send_http_error(conn, 404, "Not Found", "%s", "File not found"); - } -} + if (buf != NULL && buf_size > 0) buf[0] = '\0'; + // Find where variable starts + for (s = str; s != NULL && s + n < end; s++) { + if ((s == str || s[-1] == ' ' || s[-1] == ',') && s[n] == '=' && + !memcmp(s, var_name, n)) break; + } -// Parse HTTP headers from the given buffer, advance buffer to the point -// where parsing stopped. -static void parse_http_headers(char **buf, struct mg_request_info *ri) { - int i; + if (s != NULL && &s[n + 1] < end) { + s += n + 1; + if (*s == '"' || *s == '\'') ch = *s++; + p = s; + while (p < end && p[0] != ch && p[0] != ',' && len < (int) buf_size) { + if (p[0] == '\\' && p[1] == ch) p++; + buf[len++] = *p++; + } + if (len >= (int) buf_size || (ch != ' ' && *p != ch)) { + len = 0; + } else { + if (len > 0 && s[len - 1] == ',') len--; + if (len > 0 && s[len - 1] == ';') len--; + buf[len] = '\0'; + } + } - for (i = 0; i < (int) ARRAY_SIZE(ri->http_headers); i++) { - ri->http_headers[i].name = skip_quoted(buf, ":", " ", 0); - ri->http_headers[i].value = skip(buf, "\r\n"); - if (ri->http_headers[i].name[0] == '\0') - break; - ri->num_headers = i + 1; - } + return len; } -static int is_valid_http_method(const char *method) { - return !strcmp(method, "GET") || !strcmp(method, "POST") || - !strcmp(method, "HEAD") || !strcmp(method, "CONNECT") || - !strcmp(method, "PUT") || !strcmp(method, "DELETE") || - !strcmp(method, "OPTIONS") || !strcmp(method, "PROPFIND") - || !strcmp(method, "MKCOL") - ; +int mg_parse_header(const char *s, const char *var_name, char *buf, + size_t buf_size) { + return parse_header(s, s == NULL ? 0 : strlen(s), var_name, buf, buf_size); } -// Parse HTTP request, fill in mg_request_info structure. -// This function modifies the buffer by NUL-terminating -// HTTP request components, header names and header values. -static int parse_http_message(char *buf, int len, struct mg_request_info *ri) { - int is_request, request_length = get_request_len(buf, len); - if (request_length > 0) { - // Reset attributes. DO NOT TOUCH is_ssl, remote_ip, remote_port - ri->remote_user = ri->request_method = ri->uri = ri->http_version = NULL; - ri->num_headers = 0; - - buf[request_length - 1] = '\0'; - - // RFC says that all initial whitespaces should be ingored - while (*buf != '\0' && isspace(* (unsigned char *) buf)) { - buf++; - } - ri->request_method = skip(&buf, " "); - ri->uri = skip(&buf, " "); - ri->http_version = skip(&buf, "\r\n"); - if (((is_request = is_valid_http_method(ri->request_method)) && - memcmp(ri->http_version, "HTTP/", 5) != 0) || - (!is_request && memcmp(ri->request_method, "HTTP/", 5)) != 0) { - request_length = -1; - } else { - if (is_request) { - ri->http_version += 5; - } - parse_http_headers(&buf, ri); - } - } - return request_length; -} - -// Keep reading the input (either opened file descriptor fd, or socket sock, -// or SSL descriptor ssl) into buffer buf, until \r\n\r\n appears in the -// buffer (which marks the end of HTTP request). Buffer buf may already -// have some data. The length of the data is stored in nread. -// Upon every read operation, increase nread by the number of bytes read. -static int read_request(FILE *fp, struct mg_connection *conn, - char *buf, int bufsiz, int *nread) { - int request_len, n = 0; - - request_len = get_request_len(buf, *nread); - while (*nread < bufsiz && request_len == 0 && - (n = pull(fp, conn, buf + *nread, bufsiz - *nread)) > 0) { - *nread += n; - assert(*nread <= bufsiz); - request_len = get_request_len(buf, *nread); - } - - return request_len <= 0 && n <= 0 ? -1 : request_len; -} +#ifndef MONGOOSE_NO_SSI +static void send_ssi_file(struct mg_connection *, const char *, FILE *, int); -// For given directory path, substitute it to valid index file. -// Return 0 if index file has been found, -1 if not found. -// If the file is found, it's stats is returned in stp. -static int substitute_index_file(struct mg_connection *conn, char *path, - size_t path_len, struct file *filep) { - const char *list = conn->ctx->config[INDEX_FILES]; - struct file file = STRUCT_FILE_INITIALIZER; - struct vec filename_vec; - size_t n = strlen(path); - int found = 0; - - // The 'path' given to us points to the directory. Remove all trailing - // directory separator characters from the end of the path, and - // then append single directory separator character. - while (n > 0 && path[n - 1] == '/') { - n--; - } - path[n] = '/'; - - // Traverse index files list. For each entry, append it to the given - // path and see if the file exists. If it exists, break the loop - while ((list = next_option(list, &filename_vec, NULL)) != NULL) { - // Ignore too long entries that may overflow path buffer - if (filename_vec.len > path_len - (n + 2)) - continue; - - // Prepare full path to the index file - mg_strlcpy(path + n + 1, filename_vec.ptr, filename_vec.len + 1); - - // Does it exist? - if (mg_stat(conn, path, &file)) { - // Yes it does, break the loop - *filep = file; - found = 1; - break; - } - } - - // If no index file exists, restore directory path - if (!found) { - path[n] = '\0'; - } - - return found; +static void send_file_data(struct mg_connection *conn, FILE *fp) { + char buf[IOBUF_SIZE]; + int n; + while ((n = fread(buf, 1, sizeof(buf), fp)) > 0) { + mg_write(conn, buf, n); + } } -// Return True if we should reply 304 Not Modified. -static int is_not_modified(const struct mg_connection *conn, - const struct file *filep) { - char etag[64]; - const char *ims = mg_get_header(conn, "If-Modified-Since"); - const char *inm = mg_get_header(conn, "If-None-Match"); - construct_etag(etag, sizeof(etag), filep); - return (inm != NULL && !mg_strcasecmp(etag, inm)) || - (ims != NULL && filep->modification_time <= parse_date_string(ims)); -} - -static int forward_body_data(struct mg_connection *conn, FILE *fp, - SOCKET sock, SSL *ssl) { - const char *expect, *body; - char buf[MG_BUF_LEN]; - int to_read, nread, buffered_len, success = 0; - - expect = mg_get_header(conn, "Expect"); - assert(fp != NULL); - - if (conn->content_len == -1) { - send_http_error(conn, 411, "Length Required", "%s", ""); - } else if (expect != NULL && mg_strcasecmp(expect, "100-continue")) { - send_http_error(conn, 417, "Expectation Failed", "%s", ""); - } else { - if (expect != NULL) { - (void) mg_printf(conn, "%s", "HTTP/1.1 100 Continue\r\n\r\n"); - } - - body = conn->buf + conn->request_len + conn->consumed_content; - buffered_len = &conn->buf[conn->data_len] - body; - assert(buffered_len >= 0); - assert(conn->consumed_content == 0); - - if (buffered_len > 0) { - if ((int64_t) buffered_len > conn->content_len) { - buffered_len = (int) conn->content_len; - } - push(fp, sock, ssl, body, (int64_t) buffered_len); - conn->consumed_content += buffered_len; - } - - nread = 0; - while (conn->consumed_content < conn->content_len) { - to_read = sizeof(buf); - if ((int64_t) to_read > conn->content_len - conn->consumed_content) { - to_read = (int) (conn->content_len - conn->consumed_content); - } - nread = pull(NULL, conn, buf, to_read); - if (nread <= 0 || push(fp, sock, ssl, buf, nread) != nread) { - break; - } - conn->consumed_content += nread; - } - - if (conn->consumed_content == conn->content_len) { - success = nread >= 0; - } - - // Each error code path in this function must send an error - if (!success) { - send_http_error(conn, 577, http_500_error, "%s", ""); - } - } - - return success; -} - -#if !defined(NO_CGI) -// This structure helps to create an environment for the spawned CGI program. -// Environment is an array of "VARIABLE=VALUE\0" ASCIIZ strings, -// last element must be NULL. -// However, on Windows there is a requirement that all these VARIABLE=VALUE\0 -// strings must reside in a contiguous buffer. The end of the buffer is -// marked by two '\0' characters. -// We satisfy both worlds: we create an envp array (which is vars), all -// entries are actually pointers inside buf. -struct cgi_env_block { - struct mg_connection *conn; - char buf[CGI_ENVIRONMENT_SIZE]; // Environment buffer - int len; // Space taken - char *vars[MAX_CGI_ENVIR_VARS]; // char **envp - int nvars; // Number of variables -}; - -static char *addenv(struct cgi_env_block *block, - PRINTF_FORMAT_STRING(const char *fmt), ...) - PRINTF_ARGS(2, 3); - -// Append VARIABLE=VALUE\0 string to the buffer, and add a respective -// pointer into the vars array. -static char *addenv(struct cgi_env_block *block, const char *fmt, ...) { - int n, space; - char *added; - va_list ap; - - // Calculate how much space is left in the buffer - space = sizeof(block->buf) - block->len - 2; - assert(space >= 0); - - // Make a pointer to the free space int the buffer - added = block->buf + block->len; - - // Copy VARIABLE=VALUE\0 string into the free space - va_start(ap, fmt); - n = mg_vsnprintf(block->conn, added, (size_t) space, fmt, ap); - va_end(ap); - - // Make sure we do not overflow buffer and the envp array - if (n > 0 && n + 1 < space && - block->nvars < (int) ARRAY_SIZE(block->vars) - 2) { - // Append a pointer to the added string into the envp array - block->vars[block->nvars++] = added; - // Bump up used length counter. Include \0 terminator - block->len += n + 1; - } else { - cry(block->conn, "%s: CGI env buffer truncated for [%s]", __func__, fmt); - } - - return added; -} - -static void prepare_cgi_environment(struct mg_connection *conn, - const char *prog, - struct cgi_env_block *blk) { - const char *s, *slash; - struct vec var_vec; - char *p, src_addr[IP_ADDR_STR_LEN]; - int i; - - blk->len = blk->nvars = 0; - blk->conn = conn; - sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa); - - addenv(blk, "SERVER_NAME=%s", conn->ctx->config[AUTHENTICATION_DOMAIN]); - addenv(blk, "SERVER_ROOT=%s", conn->ctx->config[DOCUMENT_ROOT]); - addenv(blk, "DOCUMENT_ROOT=%s", conn->ctx->config[DOCUMENT_ROOT]); - - // Prepare the environment block - addenv(blk, "%s", "GATEWAY_INTERFACE=CGI/1.1"); - addenv(blk, "%s", "SERVER_PROTOCOL=HTTP/1.1"); - addenv(blk, "%s", "REDIRECT_STATUS=200"); // For PHP - - // TODO(lsm): fix this for IPv6 case - addenv(blk, "SERVER_PORT=%d", ntohs(conn->client.lsa.sin.sin_port)); - - addenv(blk, "REQUEST_METHOD=%s", conn->request_info.request_method); - addenv(blk, "REMOTE_ADDR=%s", src_addr); - addenv(blk, "REMOTE_PORT=%d", conn->request_info.remote_port); - addenv(blk, "REQUEST_URI=%s", conn->request_info.uri); - - // SCRIPT_NAME - assert(conn->request_info.uri[0] == '/'); - slash = strrchr(conn->request_info.uri, '/'); - if ((s = strrchr(prog, '/')) == NULL) - s = prog; - addenv(blk, "SCRIPT_NAME=%.*s%s", (int) (slash - conn->request_info.uri), - conn->request_info.uri, s); - - addenv(blk, "SCRIPT_FILENAME=%s", prog); - addenv(blk, "PATH_TRANSLATED=%s", prog); - addenv(blk, "HTTPS=%s", conn->ssl == NULL ? "off" : "on"); - - if ((s = mg_get_header(conn, "Content-Type")) != NULL) - addenv(blk, "CONTENT_TYPE=%s", s); - - if (conn->request_info.query_string != NULL) - addenv(blk, "QUERY_STRING=%s", conn->request_info.query_string); - - if ((s = mg_get_header(conn, "Content-Length")) != NULL) - addenv(blk, "CONTENT_LENGTH=%s", s); - - if ((s = getenv("PATH")) != NULL) - addenv(blk, "PATH=%s", s); - - if (conn->path_info != NULL) { - addenv(blk, "PATH_INFO=%s", conn->path_info); - } - -#if defined(_WIN32) - if ((s = getenv("COMSPEC")) != NULL) { - addenv(blk, "COMSPEC=%s", s); - } - if ((s = getenv("SYSTEMROOT")) != NULL) { - addenv(blk, "SYSTEMROOT=%s", s); - } - if ((s = getenv("SystemDrive")) != NULL) { - addenv(blk, "SystemDrive=%s", s); - } - if ((s = getenv("ProgramFiles")) != NULL) { - addenv(blk, "ProgramFiles=%s", s); - } - if ((s = getenv("ProgramFiles(x86)")) != NULL) { - addenv(blk, "ProgramFiles(x86)=%s", s); - } -#else - if ((s = getenv("LD_LIBRARY_PATH")) != NULL) - addenv(blk, "LD_LIBRARY_PATH=%s", s); -#endif // _WIN32 - - if ((s = getenv("PERLLIB")) != NULL) - addenv(blk, "PERLLIB=%s", s); - - if (conn->request_info.remote_user != NULL) { - addenv(blk, "REMOTE_USER=%s", conn->request_info.remote_user); - addenv(blk, "%s", "AUTH_TYPE=Digest"); - } - - // Add all headers as HTTP_* variables - for (i = 0; i < conn->request_info.num_headers; i++) { - p = addenv(blk, "HTTP_%s=%s", - conn->request_info.http_headers[i].name, - conn->request_info.http_headers[i].value); - - // Convert variable name into uppercase, and change - to _ - for (; *p != '=' && *p != '\0'; p++) { - if (*p == '-') - *p = '_'; - *p = (char) toupper(* (unsigned char *) p); - } - } - - // Add user-specified variables - s = conn->ctx->config[CGI_ENVIRONMENT]; - while ((s = next_option(s, &var_vec, NULL)) != NULL) { - addenv(blk, "%.*s", (int) var_vec.len, var_vec.ptr); - } - - blk->vars[blk->nvars++] = NULL; - blk->buf[blk->len++] = '\0'; - - assert(blk->nvars < (int) ARRAY_SIZE(blk->vars)); - assert(blk->len > 0); - assert(blk->len < (int) sizeof(blk->buf)); -} - -static void handle_cgi_request(struct mg_connection *conn, const char *prog) { - int headers_len, data_len, i, fd_stdin[2], fd_stdout[2]; - const char *status, *status_text; - char buf[16384], *pbuf, dir[PATH_MAX], *p; - struct mg_request_info ri; - struct cgi_env_block blk; - FILE *in, *out; - struct file fout = STRUCT_FILE_INITIALIZER; - pid_t pid; - ri.mg_request_info::num_headers = 0; - - prepare_cgi_environment(conn, prog, &blk); - - // CGI must be executed in its own directory. 'dir' must point to the - // directory containing executable program, 'p' must point to the - // executable program name relative to 'dir'. - (void) mg_snprintf(conn, dir, sizeof(dir), "%s", prog); - if ((p = strrchr(dir, '/')) != NULL) { - *p++ = '\0'; - } else { - dir[0] = '.', dir[1] = '\0'; - p = (char *) prog; - } - - pid = (pid_t) -1; - fd_stdin[0] = fd_stdin[1] = fd_stdout[0] = fd_stdout[1] = -1; - in = out = NULL; - - if (pipe(fd_stdin) != 0 || pipe(fd_stdout) != 0) { - send_http_error(conn, 500, http_500_error, - "Cannot create CGI pipe: %s", strerror(ERRNO)); - goto done; - } - - pid = spawn_process(conn, p, blk.buf, blk.vars, fd_stdin[0], fd_stdout[1], - dir); - // spawn_process() must close those! - // If we don't mark them as closed, close() attempt before - // return from this function throws an exception on Windows. - // Windows does not like when closed descriptor is closed again. - fd_stdin[0] = fd_stdout[1] = -1; - - if (pid == (pid_t) -1) { - send_http_error(conn, 500, http_500_error, - "Cannot spawn CGI process [%s]: %s", prog, strerror(ERRNO)); - goto done; - } - - if ((in = fdopen(fd_stdin[1], "wb")) == NULL || - (out = fdopen(fd_stdout[0], "rb")) == NULL) { - send_http_error(conn, 500, http_500_error, - "fopen: %s", strerror(ERRNO)); - goto done; - } - - setbuf(in, NULL); - setbuf(out, NULL); - fout.fp = out; - - // Send POST data to the CGI process if needed - if (!strcmp(conn->request_info.request_method, "POST") && - !forward_body_data(conn, in, INVALID_SOCKET, NULL)) { - goto done; - } - - // Close so child gets an EOF. - fclose(in); - in = NULL; - fd_stdin[1] = -1; - - // Now read CGI reply into a buffer. We need to set correct - // status code, thus we need to see all HTTP headers first. - // Do not send anything back to client, until we buffer in all - // HTTP headers. - data_len = 0; - headers_len = read_request(out, conn, buf, sizeof(buf), &data_len); - if (headers_len <= 0) { - send_http_error(conn, 500, http_500_error, - "CGI program sent malformed or too big (>%u bytes) " - "HTTP headers: [%.*s]", - (unsigned) sizeof(buf), data_len, buf); - goto done; - } - pbuf = buf; - buf[headers_len - 1] = '\0'; - parse_http_headers(&pbuf, &ri); - - // Make up and send the status line - status_text = "OK"; - if ((status = get_header(&ri, "Status")) != NULL) { - conn->status_code = atoi(status); - status_text = status; - while (isdigit(* (unsigned char *) status_text) || *status_text == ' ') { - status_text++; - } - } else if (get_header(&ri, "Location") != NULL) { - conn->status_code = 302; - } else { - conn->status_code = 200; - } - if (get_header(&ri, "Connection") != NULL && - !mg_strcasecmp(get_header(&ri, "Connection"), "keep-alive")) { - conn->must_close = 1; - } - (void) mg_printf(conn, "HTTP/1.1 %d %s\r\n", conn->status_code, - status_text); - - // Send headers - for (i = 0; i < ri.num_headers; i++) { - mg_printf(conn, "%s: %s\r\n", - ri.http_headers[i].name, ri.http_headers[i].value); - } - mg_write(conn, "\r\n", 2); - - // Send chunk of data that may have been read after the headers - conn->num_bytes_sent += mg_write(conn, buf + headers_len, - (size_t)(data_len - headers_len)); - - // Read the rest of CGI output and send to the client - send_file_data(conn, &fout, 0, INT64_MAX); - -done: - if (pid != (pid_t) -1) { - kill(pid, SIGKILL); - } - if (fd_stdin[0] != -1) { - close(fd_stdin[0]); - } - if (fd_stdout[1] != -1) { - close(fd_stdout[1]); - } - - if (in != NULL) { - fclose(in); - } else if (fd_stdin[1] != -1) { - close(fd_stdin[1]); - } - - if (out != NULL) { - fclose(out); - } else if (fd_stdout[0] != -1) { - close(fd_stdout[0]); - } -} -#endif // !NO_CGI - -// For a given PUT path, create all intermediate subdirectories -// for given path. Return 0 if the path itself is a directory, -// or -1 on error, 1 if OK. -static int put_dir(struct mg_connection *conn, const char *path) { - char buf[PATH_MAX]; - const char *s, *p; - struct file file = STRUCT_FILE_INITIALIZER; - int len, res = 1; - - for (s = p = path + 2; (p = strchr(s, '/')) != NULL; s = ++p) { - len = p - path; - if (len >= (int) sizeof(buf)) { - res = -1; - break; - } - memcpy(buf, path, len); - buf[len] = '\0'; - - // Try to create intermediate directory - DEBUG_TRACE(("mkdir(%s)", buf)); - if (!mg_stat(conn, buf, &file) && mg_mkdir(buf, 0755) != 0) { - res = -1; - break; - } - - // Is path itself a directory? - if (p[1] == '\0') { - res = 0; - } - } - - return res; -} - -static void mkcol(struct mg_connection *conn, const char *path) { - int rc, body_len; - struct de de; - memset(&de.file, 0, sizeof(de.file)); - mg_stat(conn, path, &de.file); - - if(de.file.modification_time) { - send_http_error(conn, 405, "Method Not Allowed", - "mkcol(%s): %s", path, strerror(ERRNO)); - return; - } - - body_len = conn->data_len - conn->request_len; - if(body_len > 0) { - send_http_error(conn, 415, "Unsupported media type", - "mkcol(%s): %s", path, strerror(ERRNO)); - return; - } - - rc = mg_mkdir(path, 0755); - - if (rc == 0) { - conn->status_code = 201; - mg_printf(conn, "HTTP/1.1 %d Created\r\n\r\n", conn->status_code); - } else if (rc == -1) { - if(errno == EEXIST) - send_http_error(conn, 405, "Method Not Allowed", - "mkcol(%s): %s", path, strerror(ERRNO)); - else if(errno == EACCES) - send_http_error(conn, 403, "Forbidden", - "mkcol(%s): %s", path, strerror(ERRNO)); - else if(errno == ENOENT) - send_http_error(conn, 409, "Conflict", - "mkcol(%s): %s", path, strerror(ERRNO)); - else - send_http_error(conn, 500, http_500_error, - "fopen(%s): %s", path, strerror(ERRNO)); - } -} - -static void put_file(struct mg_connection *conn, const char *path) { - struct file file = STRUCT_FILE_INITIALIZER; - const char *range; - int64_t r1, r2; - int rc; - - conn->status_code = mg_stat(conn, path, &file) ? 200 : 201; - - if ((rc = put_dir(conn, path)) == 0) { - mg_printf(conn, "HTTP/1.1 %d OK\r\n\r\n", conn->status_code); - } else if (rc == -1) { - send_http_error(conn, 500, http_500_error, - "put_dir(%s): %s", path, strerror(ERRNO)); - } else if (!mg_fopen(conn, path, "wb+", &file) || file.fp == NULL) { - mg_fclose(&file); - send_http_error(conn, 500, http_500_error, - "fopen(%s): %s", path, strerror(ERRNO)); - } else { - fclose_on_exec(&file); - range = mg_get_header(conn, "Content-Range"); - r1 = r2 = 0; - if (range != NULL && parse_range_header(range, &r1, &r2) > 0) { - conn->status_code = 206; - fseeko(file.fp, r1, SEEK_SET); - } - if (forward_body_data(conn, file.fp, INVALID_SOCKET, NULL)) { - mg_printf(conn, "HTTP/1.1 %d OK\r\n\r\n", conn->status_code); - } - mg_fclose(&file); - } -} - -static void send_ssi_file(struct mg_connection *, const char *, - struct file *, int); - static void do_ssi_include(struct mg_connection *conn, const char *ssi, - char *tag, int include_level) { - char file_name[MG_BUF_LEN], path[PATH_MAX], *p; - struct file file = STRUCT_FILE_INITIALIZER; - - // sscanf() is safe here, since send_ssi_file() also uses buffer - // of size MG_BUF_LEN to get the tag. So strlen(tag) is always < MG_BUF_LEN. - if (sscanf(tag, " virtual=\"%[^\"]\"", file_name) == 1) { - // File name is relative to the webserver root - (void) mg_snprintf(conn, path, sizeof(path), "%s%c%s", - conn->ctx->config[DOCUMENT_ROOT], '/', file_name); - } else if (sscanf(tag, " file=\"%[^\"]\"", file_name) == 1) { - // File name is relative to the webserver working directory - // or it is absolute system path - (void) mg_snprintf(conn, path, sizeof(path), "%s", file_name); - } else if (sscanf(tag, " \"%[^\"]\"", file_name) == 1) { - // File name is relative to the currect document - (void) mg_snprintf(conn, path, sizeof(path), "%s", ssi); - if ((p = strrchr(path, '/')) != NULL) { - p[1] = '\0'; - } - (void) mg_snprintf(conn, path + strlen(path), - sizeof(path) - strlen(path), "%s", file_name); - } else { - cry(conn, "Bad SSI #include: [%s]", tag); - return; - } - - if (!mg_fopen(conn, path, "rb", &file)) { - cry(conn, "Cannot open SSI #include: [%s]: fopen(%s): %s", - tag, path, strerror(ERRNO)); - } else { - fclose_on_exec(&file); - if (match_prefix(conn->ctx->config[SSI_EXTENSIONS], - strlen(conn->ctx->config[SSI_EXTENSIONS]), path) > 0) { - send_ssi_file(conn, path, &file, include_level + 1); - } else { - send_file_data(conn, &file, 0, INT64_MAX); - } - mg_fclose(&file); - } -} - -#if !defined(NO_POPEN) + char *tag, int include_level) { + char file_name[IOBUF_SIZE], path[MAX_PATH_SIZE], *p; + char **opts = (MG_CONN_2_CONN(conn))->server->config_options; + FILE *fp; + + // sscanf() is safe here, since send_ssi_file() also uses buffer + // of size MG_BUF_LEN to get the tag. So strlen(tag) is always < MG_BUF_LEN. + if (sscanf(tag, " virtual=\"%[^\"]\"", file_name) == 1) { + // File name is relative to the webserver root + mg_snprintf(path, sizeof(path), "%s%c%s", + opts[DOCUMENT_ROOT], '/', file_name); + } else if (sscanf(tag, " abspath=\"%[^\"]\"", file_name) == 1) { + // File name is relative to the webserver working directory + // or it is absolute system path + mg_snprintf(path, sizeof(path), "%s", file_name); + } else if (sscanf(tag, " file=\"%[^\"]\"", file_name) == 1 || + sscanf(tag, " \"%[^\"]\"", file_name) == 1) { + // File name is relative to the currect document + mg_snprintf(path, sizeof(path), "%s", ssi); + if ((p = strrchr(path, '/')) != NULL) { + p[1] = '\0'; + } + mg_snprintf(path + strlen(path), sizeof(path) - strlen(path), "%s", + file_name); + } else { + mg_printf(conn, "Bad SSI #include: [%s]", tag); + return; + } + + if ((fp = fopen(path, "rb")) == NULL) { + mg_printf(conn, "Cannot open SSI #include: [%s]: fopen(%s): %s", + tag, path, strerror(errno)); + } else { + ns_set_close_on_exec(fileno(fp)); + if (mg_match_prefix(opts[SSI_PATTERN], strlen(opts[SSI_PATTERN]), + path) > 0) { + send_ssi_file(conn, path, fp, include_level + 1); + } else { + send_file_data(conn, fp); + } + fclose(fp); + } +} + +#ifndef MONGOOSE_NO_POPEN static void do_ssi_exec(struct mg_connection *conn, char *tag) { - char cmd[MG_BUF_LEN]; - struct file file = STRUCT_FILE_INITIALIZER; - - if (sscanf(tag, " \"%[^\"]\"", cmd) != 1) { - cry(conn, "Bad SSI #exec: [%s]", tag); - } else if ((file.fp = popen(cmd, "r")) == NULL) { - cry(conn, "Cannot SSI #exec: [%s]: %s", cmd, strerror(ERRNO)); - } else { - send_file_data(conn, &file, 0, INT64_MAX); - pclose(file.fp); - } -} -#endif // !NO_POPEN + char cmd[IOBUF_SIZE]; + FILE *fp; -static int mg_fgetc(struct file *filep, int offset) { - if (filep->membuf != NULL && offset >=0 && offset < filep->size) { - return ((unsigned char *) filep->membuf)[offset]; - } else if (filep->fp != NULL) { - return fgetc(filep->fp); - } else { - return EOF; - } + if (sscanf(tag, " \"%[^\"]\"", cmd) != 1) { + mg_printf(conn, "Bad SSI #exec: [%s]", tag); + } else if ((fp = popen(cmd, "r")) == NULL) { + mg_printf(conn, "Cannot SSI #exec: [%s]: %s", cmd, strerror(errno)); + } else { + send_file_data(conn, fp); + pclose(fp); + } } +#endif // !MONGOOSE_NO_POPEN static void send_ssi_file(struct mg_connection *conn, const char *path, - struct file *filep, int include_level) { - char buf[MG_BUF_LEN]; - int ch, offset, len, in_ssi_tag; - - if (include_level > 10) { - cry(conn, "SSI #include level is too deep (%s)", path); - return; - } - - in_ssi_tag = len = offset = 0; - while ((ch = mg_fgetc(filep, offset)) != EOF) { - if (in_ssi_tag && ch == '>') { - in_ssi_tag = 0; - buf[len++] = (char) ch; - buf[len] = '\0'; - assert(len <= (int) sizeof(buf)); - if (len < 6 || memcmp(buf, "<!--#", 5) != 0) { - // Not an SSI tag, pass it - (void) mg_write(conn, buf, (size_t) len); - } else { - if (!memcmp(buf + 5, "include", 7)) { - do_ssi_include(conn, path, buf + 12, include_level); -#if !defined(NO_POPEN) - } else if (!memcmp(buf + 5, "exec", 4)) { - do_ssi_exec(conn, buf + 9); + FILE *fp, int include_level) { + char buf[IOBUF_SIZE]; + int ch, offset, len, in_ssi_tag; + + if (include_level > 10) { + mg_printf(conn, "SSI #include level is too deep (%s)", path); + return; + } + + in_ssi_tag = len = offset = 0; + while ((ch = fgetc(fp)) != EOF) { + if (in_ssi_tag && ch == '>') { + in_ssi_tag = 0; + buf[len++] = (char) ch; + buf[len] = '\0'; + assert(len <= (int) sizeof(buf)); + if (len < 6 || memcmp(buf, "<!--#", 5) != 0) { + // Not an SSI tag, pass it + (void) mg_write(conn, buf, (size_t) len); + } else { + if (!memcmp(buf + 5, "include", 7)) { + do_ssi_include(conn, path, buf + 12, include_level); +#if !defined(MONGOOSE_NO_POPEN) + } else if (!memcmp(buf + 5, "exec", 4)) { + do_ssi_exec(conn, buf + 9); #endif // !NO_POPEN - } else { - cry(conn, "%s: unknown SSI " "command: \"%s\"", path, buf); - } - } - len = 0; - } else if (in_ssi_tag) { - if (len == 5 && memcmp(buf, "<!--#", 5) != 0) { - // Not an SSI tag - in_ssi_tag = 0; - } else if (len == (int) sizeof(buf) - 2) { - cry(conn, "%s: SSI tag is too large", path); - len = 0; - } - buf[len++] = ch & 0xff; - } else if (ch == '<') { - in_ssi_tag = 1; - if (len > 0) { - mg_write(conn, buf, (size_t) len); - } - len = 0; - buf[len++] = ch & 0xff; - } else { - buf[len++] = ch & 0xff; - if (len == (int) sizeof(buf)) { - mg_write(conn, buf, (size_t) len); - len = 0; - } - } - } - - // Send the rest of buffered data - if (len > 0) { - mg_write(conn, buf, (size_t) len); - } -} - -static void handle_ssi_file_request(struct mg_connection *conn, - const char *path) { - struct file file = STRUCT_FILE_INITIALIZER; - - if (!mg_fopen(conn, path, "rb", &file)) { - send_http_error(conn, 500, http_500_error, "fopen(%s): %s", path, - strerror(ERRNO)); - } else { - conn->must_close = 1; - fclose_on_exec(&file); - mg_printf(conn, "HTTP/1.1 200 OK\r\n" - "Content-Type: text/html\r\nConnection: %s\r\n\r\n", - suggest_connection_header(conn)); - send_ssi_file(conn, path, &file, 0); - mg_fclose(&file); - } -} - -static void send_options(struct mg_connection *conn) { - conn->status_code = 200; - - mg_printf(conn, "%s", "HTTP/1.1 200 OK\r\n" - "Allow: GET, POST, HEAD, CONNECT, PUT, DELETE, OPTIONS, PROPFIND, MKCOL\r\n" - "DAV: 1\r\n\r\n"); -} - -// Writes PROPFIND properties for a collection element -static void print_props(struct mg_connection *conn, const char* uri, - struct file *filep) { - char mtime[64]; - gmt_time_string(mtime, sizeof(mtime), &filep->modification_time); - conn->num_bytes_sent += mg_printf(conn, - "<d:response>" - "<d:href>%s</d:href>" - "<d:propstat>" - "<d:prop>" - "<d:resourcetype>%s</d:resourcetype>" - "<d:getcontentlength>%" INT64_FMT "</d:getcontentlength>" - "<d:getlastmodified>%s</d:getlastmodified>" - "</d:prop>" - "<d:status>HTTP/1.1 200 OK</d:status>" - "</d:propstat>" - "</d:response>\n", - uri, - filep->is_directory ? "<d:collection/>" : "", - filep->size, - mtime); -} - -static void print_dav_dir_entry(struct de *de, void *data) { - char href[PATH_MAX]; - char href_encoded[PATH_MAX]; - struct mg_connection *conn = (struct mg_connection *) data; - mg_snprintf(conn, href, sizeof(href), "%s%s", - conn->request_info.uri, de->file_name); - mg_url_encode(href, href_encoded, PATH_MAX-1); - print_props(conn, href_encoded, &de->file); -} - -static void handle_propfind(struct mg_connection *conn, const char *path, - struct file *filep) { - const char *depth = mg_get_header(conn, "Depth"); - - conn->must_close = 1; - conn->status_code = 207; - mg_printf(conn, "HTTP/1.1 207 Multi-Status\r\n" - "Connection: close\r\n" - "Content-Type: text/xml; charset=utf-8\r\n\r\n"); - - conn->num_bytes_sent += mg_printf(conn, - "<?xml version=\"1.0\" encoding=\"utf-8\"?>" - "<d:multistatus xmlns:d='DAV:'>\n"); - - // Print properties for the requested resource itself - print_props(conn, conn->request_info.uri, filep); - - // If it is a directory, print directory entries too if Depth is not 0 - if (filep->is_directory && - !mg_strcasecmp(conn->ctx->config[ENABLE_DIRECTORY_LISTING], "yes") && - (depth == NULL || strcmp(depth, "0") != 0)) { - scan_directory(conn, path, conn, &print_dav_dir_entry); - } - - conn->num_bytes_sent += mg_printf(conn, "%s\n", "</d:multistatus>"); -} - -#if defined(USE_WEBSOCKET) - -// START OF SHA-1 code -// Copyright(c) By Steve Reid <steve@edmweb.com> -#define SHA1HANDSOFF -#if defined(__sun) -#include "solarisfixes.h" -#endif - -union char64long16 { unsigned char c[64]; uint32_t l[16]; }; - -#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits)))) - -static uint32_t blk0(union char64long16 *block, int i) { - // Forrest: SHA expect BIG_ENDIAN, swap if LITTLE_ENDIAN - if (!is_big_endian()) { - block->l[i] = (rol(block->l[i], 24) & 0xFF00FF00) | - (rol(block->l[i], 8) & 0x00FF00FF); - } - return block->l[i]; + } else { + mg_printf(conn, "%s: unknown SSI " "command: \"%s\"", path, buf); + } + } + len = 0; + } else if (in_ssi_tag) { + if (len == 5 && memcmp(buf, "<!--#", 5) != 0) { + // Not an SSI tag + in_ssi_tag = 0; + } else if (len == (int) sizeof(buf) - 2) { + mg_printf(conn, "%s: SSI tag is too large", path); + len = 0; + } + buf[len++] = ch & 0xff; + } else if (ch == '<') { + in_ssi_tag = 1; + if (len > 0) { + mg_write(conn, buf, (size_t) len); + } + len = 0; + buf[len++] = ch & 0xff; + } else { + buf[len++] = ch & 0xff; + if (len == (int) sizeof(buf)) { + mg_write(conn, buf, (size_t) len); + len = 0; + } + } + } + + // Send the rest of buffered data + if (len > 0) { + mg_write(conn, buf, (size_t) len); + } +} + +static void handle_ssi_request(struct connection *conn, const char *path) { + FILE *fp; + struct vec mime_vec; + + if ((fp = fopen(path, "rb")) == NULL) { + send_http_error(conn, 500, "fopen(%s): %s", path, strerror(errno)); + } else { + ns_set_close_on_exec(fileno(fp)); + get_mime_type(conn->server, path, &mime_vec); + conn->mg_conn.status_code = 200; + mg_printf(&conn->mg_conn, + "HTTP/1.1 %d OK\r\n" + "Content-Type: %.*s\r\n" + "Connection: close\r\n\r\n", + conn->mg_conn.status_code, (int) mime_vec.len, mime_vec.ptr); + send_ssi_file(&conn->mg_conn, path, fp, 0); + fclose(fp); + close_local_endpoint(conn); + } } +#endif -#define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \ - ^block->l[(i+2)&15]^block->l[i&15],1)) -#define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk0(block, i)+0x5A827999+rol(v,5);w=rol(w,30); -#define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=rol(w,30); -#define R2(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=rol(w,30); -#define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30); -#define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30); - -typedef struct { - uint32_t state[5]; - uint32_t count[2]; - unsigned char buffer[64]; -} SHA1_CTX; - -static void SHA1Transform(uint32_t state[5], const unsigned char buffer[64]) { - uint32_t a, b, c, d, e; - union char64long16 block[1]; - - memcpy(block, buffer, 64); - a = state[0]; - b = state[1]; - c = state[2]; - d = state[3]; - e = state[4]; - R0(a,b,c,d,e, 0); R0(e,a,b,c,d, 1); R0(d,e,a,b,c, 2); R0(c,d,e,a,b, 3); - R0(b,c,d,e,a, 4); R0(a,b,c,d,e, 5); R0(e,a,b,c,d, 6); R0(d,e,a,b,c, 7); - R0(c,d,e,a,b, 8); R0(b,c,d,e,a, 9); R0(a,b,c,d,e,10); R0(e,a,b,c,d,11); - R0(d,e,a,b,c,12); R0(c,d,e,a,b,13); R0(b,c,d,e,a,14); R0(a,b,c,d,e,15); - R1(e,a,b,c,d,16); R1(d,e,a,b,c,17); R1(c,d,e,a,b,18); R1(b,c,d,e,a,19); - R2(a,b,c,d,e,20); R2(e,a,b,c,d,21); R2(d,e,a,b,c,22); R2(c,d,e,a,b,23); - R2(b,c,d,e,a,24); R2(a,b,c,d,e,25); R2(e,a,b,c,d,26); R2(d,e,a,b,c,27); - R2(c,d,e,a,b,28); R2(b,c,d,e,a,29); R2(a,b,c,d,e,30); R2(e,a,b,c,d,31); - R2(d,e,a,b,c,32); R2(c,d,e,a,b,33); R2(b,c,d,e,a,34); R2(a,b,c,d,e,35); - R2(e,a,b,c,d,36); R2(d,e,a,b,c,37); R2(c,d,e,a,b,38); R2(b,c,d,e,a,39); - R3(a,b,c,d,e,40); R3(e,a,b,c,d,41); R3(d,e,a,b,c,42); R3(c,d,e,a,b,43); - R3(b,c,d,e,a,44); R3(a,b,c,d,e,45); R3(e,a,b,c,d,46); R3(d,e,a,b,c,47); - R3(c,d,e,a,b,48); R3(b,c,d,e,a,49); R3(a,b,c,d,e,50); R3(e,a,b,c,d,51); - R3(d,e,a,b,c,52); R3(c,d,e,a,b,53); R3(b,c,d,e,a,54); R3(a,b,c,d,e,55); - R3(e,a,b,c,d,56); R3(d,e,a,b,c,57); R3(c,d,e,a,b,58); R3(b,c,d,e,a,59); - R4(a,b,c,d,e,60); R4(e,a,b,c,d,61); R4(d,e,a,b,c,62); R4(c,d,e,a,b,63); - R4(b,c,d,e,a,64); R4(a,b,c,d,e,65); R4(e,a,b,c,d,66); R4(d,e,a,b,c,67); - R4(c,d,e,a,b,68); R4(b,c,d,e,a,69); R4(a,b,c,d,e,70); R4(e,a,b,c,d,71); - R4(d,e,a,b,c,72); R4(c,d,e,a,b,73); R4(b,c,d,e,a,74); R4(a,b,c,d,e,75); - R4(e,a,b,c,d,76); R4(d,e,a,b,c,77); R4(c,d,e,a,b,78); R4(b,c,d,e,a,79); - state[0] += a; - state[1] += b; - state[2] += c; - state[3] += d; - state[4] += e; - a = b = c = d = e = 0; - memset(block, '\0', sizeof(block)); -} +static int parse_url(const char *url, char *proto, size_t plen, + char *host, size_t hlen, unsigned short *port) { + int n; + char fmt1[100], fmt2[100], fmt3[100]; + + *port = 80; + proto[0] = host[0] = '\0'; + + snprintf(fmt1, sizeof(fmt1), "%%%zu[a-z]://%%%zu[^: ]:%%hu%%n", plen, hlen); + snprintf(fmt2, sizeof(fmt2), "%%%zu[a-z]://%%%zu[^/ ]%%n", plen, hlen); + snprintf(fmt3, sizeof(fmt3), "%%%zu[^: ]:%%hu%%n", hlen); + + if (sscanf(url, fmt1, proto, host, port, &n) == 3 || + sscanf(url, fmt2, proto, host, &n) == 2) { + return n; + } else if (sscanf(url, fmt3, host, port, &n) == 2) { + proto[0] = '\0'; + return n; + } + + return 0; +} + +static void proxy_request(struct ns_connection *pc, struct mg_connection *c) { + int i, sent_close_header = 0; + + ns_printf(pc, "%s %s HTTP/%s\r\n", c->request_method, c->uri, + c->http_version); + for (i = 0; i < c->num_headers; i++) { + if (mg_strcasecmp(c->http_headers[i].name, "Connection") == 0) { + // Force connection close, cause we don't parse proxy replies + // therefore we don't know message boundaries + //ns_printf(pc, "%s: %s\r\n", "Connection", "close"); + sent_close_header = 1; + //} else { + } + ns_printf(pc, "%s: %s\r\n", c->http_headers[i].name, + c->http_headers[i].value); + } + if (!sent_close_header) { + ns_printf(pc, "%s: %s\r\n", "Connection", "close"); + } + ns_printf(pc, "%s", "\r\n"); + ns_send(pc, c->content, c->content_len); + +} + +static void proxify_connection(struct connection *conn) { + char proto[10], host[500], cert[500]; + unsigned short port = 80; + struct mg_connection *c = &conn->mg_conn; + struct ns_server *server = &conn->server->ns_server; + struct ns_connection *pc; + int n, use_ssl; + + proto[0] = host[0] = cert[0] = '\0'; + n = parse_url(c->uri, proto, sizeof(proto), host, sizeof(host), &port); + +#ifdef NS_ENABLE_SSL + // Find out whether we should be in the MITM mode + { + const char *certs = conn->server->config_options[SSL_MITM_CERTS]; + int host_len = strlen(host); + struct vec a, b; + + while ((certs = next_option(certs, &a, &b)) != NULL) { + if (a.len == host_len && mg_strncasecmp(a.ptr, host, a.len) == 0) { + snprintf(cert, sizeof(cert), "%.*s", b.len, b.ptr); + break; + } + } + } +#endif -static void SHA1Init(SHA1_CTX* context) { - context->state[0] = 0x67452301; - context->state[1] = 0xEFCDAB89; - context->state[2] = 0x98BADCFE; - context->state[3] = 0x10325476; - context->state[4] = 0xC3D2E1F0; - context->count[0] = context->count[1] = 0; -} + use_ssl = port != 80 && cert[0] != '\0'; + + if (n > 0 && + (pc = ns_connect(server, host, port, use_ssl, conn)) != NULL) { + // Interlink two connections + pc->flags |= MG_PROXY_CONN; + conn->endpoint_type = EP_PROXY; + conn->endpoint.nc = pc; + DBG(("%p [%s] -> %p %d", conn, c->uri, pc, use_ssl)); + + if (strcmp(c->request_method, "CONNECT") == 0) { + // For CONNECT request, reply with 200 OK. Tunnel is established. + mg_printf(c, "%s", "HTTP/1.1 200 OK\r\n\r\n"); + conn->request_len = 0; + free(conn->request); + conn->request = NULL; +#ifdef NS_ENABLE_SSL + if (use_ssl) { + SSL_CTX *ctx; + + DBG(("%s", "Triggering MITM mode: terminating SSL connection")); + SSL_library_init(); + ctx = SSL_CTX_new(SSLv23_server_method()); + + if (ctx == NULL) { + pc->flags |= NSF_CLOSE_IMMEDIATELY; + } else { + SSL_CTX_use_certificate_file(ctx, cert, 1); + SSL_CTX_use_PrivateKey_file(ctx, cert, 1); + SSL_CTX_use_certificate_chain_file(ctx, cert); + + // When clear-text reply is pushed to client, switch to SSL mode. + n = send(conn->ns_conn->sock, conn->ns_conn->send_iobuf.buf, + conn->ns_conn->send_iobuf.len, 0); + DBG(("%p %lu %d SEND", c, conn->ns_conn->send_iobuf.len, n)); + conn->ns_conn->send_iobuf.len = 0; + if ((conn->ns_conn->ssl = SSL_new(ctx)) != NULL) { + //SSL_set_fd((SSL *) c->connection_param, conn->ns_conn->sock); + SSL_set_fd(conn->ns_conn->ssl, conn->ns_conn->sock); + } + SSL_CTX_free(ctx); + } + } +#endif + } else { + // For other methods, forward the request to the target host. + c->uri += n; + proxy_request(pc, c); + } + } else { + conn->ns_conn->flags |= NSF_CLOSE_IMMEDIATELY; + } +} + +static void open_local_endpoint(struct connection *conn, int skip_user) { +#ifndef MONGOOSE_NO_FILESYSTEM + file_stat_t st; + char path[MAX_PATH_SIZE]; + int exists = 0, is_directory = 0; +#ifndef MONGOOSE_NO_CGI + const char *cgi_pat = conn->server->config_options[CGI_PATTERN]; +#else + const char *cgi_pat = DEFAULT_CGI_PATTERN; +#endif +#ifndef MONGOOSE_NO_DIRECTORY_LISTING + const char *dir_lst = conn->server->config_options[ENABLE_DIRECTORY_LISTING]; +#else + const char *dir_lst = "yes"; +#endif +#endif -static void SHA1Update(SHA1_CTX* context, const unsigned char* data, - uint32_t len) { - uint32_t i, j; - - j = context->count[0]; - if ((context->count[0] += len << 3) < j) - context->count[1]++; - context->count[1] += (len>>29); - j = (j >> 3) & 63; - if ((j + len) > 63) { - memcpy(&context->buffer[j], data, (i = 64-j)); - SHA1Transform(context->state, context->buffer); - for ( ; i + 63 < len; i += 64) { - SHA1Transform(context->state, &data[i]); - } - j = 0; - } - else i = 0; - memcpy(&context->buffer[j], &data[i], len - i); -} + // If EP_USER was set in a prev call, reset it + conn->endpoint_type = EP_NONE; -static void SHA1Final(unsigned char digest[20], SHA1_CTX* context) { - unsigned i; - unsigned char finalcount[8], c; - - for (i = 0; i < 8; i++) { - finalcount[i] = (unsigned char)((context->count[(i >= 4 ? 0 : 1)] - >> ((3-(i & 3)) * 8) ) & 255); - } - c = 0200; - SHA1Update(context, &c, 1); - while ((context->count[0] & 504) != 448) { - c = 0000; - SHA1Update(context, &c, 1); - } - SHA1Update(context, finalcount, 8); - for (i = 0; i < 20; i++) { - digest[i] = (unsigned char) - ((context->state[i>>2] >> ((3-(i & 3)) * 8) ) & 255); - } - memset(context, '\0', sizeof(*context)); - memset(&finalcount, '\0', sizeof(finalcount)); -} -// END OF SHA1 CODE +#ifndef MONGOOSE_NO_AUTH + if (conn->server->event_handler && call_user(conn, MG_AUTH) == MG_FALSE) { + mg_send_digest_auth_request(&conn->mg_conn); + return; + } +#endif -static void base64_encode(const unsigned char *src, int src_len, char *dst) { - static const char *b64 = - "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; - int i, j, a, b, c; - - for (i = j = 0; i < src_len; i += 3) { - a = src[i]; - b = i + 1 >= src_len ? 0 : src[i + 1]; - c = i + 2 >= src_len ? 0 : src[i + 2]; - - dst[j++] = b64[a >> 2]; - dst[j++] = b64[((a & 3) << 4) | (b >> 4)]; - if (i + 1 < src_len) { - dst[j++] = b64[(b & 15) << 2 | (c >> 6)]; - } - if (i + 2 < src_len) { - dst[j++] = b64[c & 63]; - } - } - while (j % 4 != 0) { - dst[j++] = '='; - } - dst[j++] = '\0'; -} - -static void send_websocket_handshake(struct mg_connection *conn) { - static const char *magic = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"; - char buf[100], sha[20], b64_sha[sizeof(sha) * 2]; - SHA1_CTX sha_ctx; - - mg_snprintf(conn, buf, sizeof(buf), "%s%s", - mg_get_header(conn, "Sec-WebSocket-Key"), magic); - SHA1Init(&sha_ctx); - SHA1Update(&sha_ctx, (unsigned char *) buf, strlen(buf)); - SHA1Final((unsigned char *) sha, &sha_ctx); - base64_encode((unsigned char *) sha, sizeof(sha), b64_sha); - mg_printf(conn, "%s%s%s", - "HTTP/1.1 101 Switching Protocols\r\n" - "Upgrade: websocket\r\n" - "Connection: Upgrade\r\n" - "Sec-WebSocket-Accept: ", b64_sha, "\r\n\r\n"); -} - -static void read_websocket(struct mg_connection *conn) { - // Pointer to the beginning of the portion of the incoming websocket message - // queue. The original websocket upgrade request is never removed, - // so the queue begins after it. - unsigned char *buf = (unsigned char *) conn->buf + conn->request_len; - int bits, n, stop = 0; - size_t i, len, mask_len = 0, data_len = 0, header_len, body_len; - // data points to the place where the message is stored when passed to the - // websocket_data callback. This is either mem on the stack, - // or a dynamically allocated buffer if it is too large. - char mem[4 * 1024], mask[4], *data; - - assert(conn->content_len == 0); - - // Loop continuously, reading messages from the socket, invoking the callback, - // and waiting repeatedly until an error occurs. - while (!stop) { - header_len = 0; - // body_len is the length of the entire queue in bytes - // len is the length of the current message - // data_len is the length of the current message's data payload - // header_len is the length of the current message's header - if ((body_len = conn->data_len - conn->request_len) >= 2) { - len = buf[1] & 127; - mask_len = buf[1] & 128 ? 4 : 0; - if (len < 126 && body_len >= mask_len) { - data_len = len; - header_len = 2 + mask_len; - } else if (len == 126 && body_len >= 4 + mask_len) { - header_len = 4 + mask_len; - data_len = ((((int) buf[2]) << 8) + buf[3]); - } else if (body_len >= 10 + mask_len) { - header_len = 10 + mask_len; - data_len = (((uint64_t) htonl(* (uint32_t *) &buf[2])) << 32) + - htonl(* (uint32_t *) &buf[6]); - } - } - - // Data layout is as follows: - // conn->buf buf - // v v frame1 | frame2 - // |---------------------|----------------|--------------|------- - // | |<--header_len-->|<--data_len-->| - // |<-conn->request_len->|<-----body_len----------->| - // |<-------------------conn->data_len------------->| - - if (header_len > 0) { - // Allocate space to hold websocket payload - data = mem; - if (data_len > sizeof(mem) && (data = (char*)malloc(data_len)) == NULL) { - // Allocation failed, exit the loop and then close the connection - // TODO: notify user about the failure - break; - } - - // Save mask and bits, otherwise it may be clobbered by memmove below - bits = buf[0]; - memcpy(mask, buf + header_len - mask_len, mask_len); - - // Read frame payload into the allocated buffer. - assert(body_len >= header_len); - if (data_len + header_len > body_len) { - len = body_len - header_len; - memcpy(data, buf + header_len, len); - // TODO: handle pull error - pull_all(NULL, conn, data + len, data_len - len); - conn->data_len = conn->request_len; - } else { - len = data_len + header_len; - memcpy(data, buf + header_len, data_len); - memmove(buf, buf + len, body_len - len); - conn->data_len -= len; - } - - // Apply mask if necessary - if (mask_len > 0) { - for (i = 0; i < data_len; i++) { - data[i] ^= mask[i % 4]; - } - } - - // Exit the loop if callback signalled to exit, - // or "connection close" opcode received. - if ((conn->ctx->callbacks.websocket_data != NULL && - !conn->ctx->callbacks.websocket_data(conn, bits, data, data_len)) || - (bits & 0xf) == 8) { // Opcode == 8, connection close - stop = 1; - } - - if (data != mem) { - free(data); - } - // Not breaking the loop, process next websocket frame. - } else { - // Buffering websocket request - if ((n = pull(NULL, conn, conn->buf + conn->data_len, - conn->buf_size - conn->data_len)) <= 0) { - break; - } - conn->data_len += n; - } - } + // Call URI handler if one is registered for this URI + if (skip_user == 0 && conn->server->event_handler != NULL) { + conn->endpoint_type = EP_USER; +#if MONGOOSE_POST_SIZE_LIMIT > 1 + { + const char *cl = mg_get_header(&conn->mg_conn, "Content-Length"); + if ((strcmp(conn->mg_conn.request_method, "POST") == 0 || + strcmp(conn->mg_conn.request_method, "PUT") == 0) && + (cl == NULL || to64(cl) > MONGOOSE_POST_SIZE_LIMIT)) { + send_http_error(conn, 500, "POST size > %zu", + (size_t) MONGOOSE_POST_SIZE_LIMIT); + } + } +#endif + return; + } + + if (strcmp(conn->mg_conn.request_method, "CONNECT") == 0 || + memcmp(conn->mg_conn.uri, "http", 4) == 0) { + proxify_connection(conn); + return; + } + +#ifdef MONGOOSE_NO_FILESYSTEM + if (!strcmp(conn->mg_conn.request_method, "OPTIONS")) { + send_options(conn); + } else { + send_http_error(conn, 404, NULL); + } +#else + exists = convert_uri_to_file_name(conn, path, sizeof(path), &st); + is_directory = S_ISDIR(st.st_mode); + + if (!strcmp(conn->mg_conn.request_method, "OPTIONS")) { + send_options(conn); + } else if (conn->server->config_options[DOCUMENT_ROOT] == NULL) { + send_http_error(conn, 404, NULL); +#ifndef MONGOOSE_NO_AUTH + } else if ((!is_dav_request(conn) && !is_authorized(conn, path)) || + (is_dav_request(conn) && !is_authorized_for_dav(conn))) { + mg_send_digest_auth_request(&conn->mg_conn); + close_local_endpoint(conn); +#endif +#ifndef MONGOOSE_NO_DAV + } else if (!strcmp(conn->mg_conn.request_method, "PROPFIND")) { + handle_propfind(conn, path, &st, exists); + } else if (!strcmp(conn->mg_conn.request_method, "MKCOL")) { + handle_mkcol(conn, path); + } else if (!strcmp(conn->mg_conn.request_method, "DELETE")) { + handle_delete(conn, path); + } else if (!strcmp(conn->mg_conn.request_method, "PUT")) { + handle_put(conn, path); +#endif + } else if (!exists || must_hide_file(conn, path)) { + send_http_error(conn, 404, NULL); + } else if (is_directory && + conn->mg_conn.uri[strlen(conn->mg_conn.uri) - 1] != '/') { + conn->mg_conn.status_code = 301; + mg_printf(&conn->mg_conn, "HTTP/1.1 301 Moved Permanently\r\n" + "Location: %s/\r\n\r\n", conn->mg_conn.uri); + close_local_endpoint(conn); + } else if (is_directory && !find_index_file(conn, path, sizeof(path), &st)) { + if (!mg_strcasecmp(dir_lst, "yes")) { +#ifndef MONGOOSE_NO_DIRECTORY_LISTING + send_directory_listing(conn, path); +#else + send_http_error(conn, 501, NULL); +#endif + } else { + send_http_error(conn, 403, NULL); + } + } else if (mg_match_prefix(cgi_pat, strlen(cgi_pat), path) > 0) { +#if !defined(MONGOOSE_NO_CGI) + open_cgi_endpoint(conn, path); +#else + send_http_error(conn, 501, NULL); +#endif // !MONGOOSE_NO_CGI +#ifndef MONGOOSE_NO_SSI + } else if (mg_match_prefix(conn->server->config_options[SSI_PATTERN], + strlen(conn->server->config_options[SSI_PATTERN]), + path) > 0) { + handle_ssi_request(conn, path); +#endif + } else if (is_not_modified(conn, &st)) { + send_http_error(conn, 304, NULL); + } else if ((conn->endpoint.fd = open(path, O_RDONLY | O_BINARY)) != -1) { + // O_BINARY is required for Windows, otherwise in default text mode + // two bytes \r\n will be read as one. + open_file_endpoint(conn, path, &st); + } else { + send_http_error(conn, 404, NULL); + } +#endif // MONGOOSE_NO_FILESYSTEM } -int mg_websocket_write(struct mg_connection* conn, int opcode, - const char *data, size_t data_len) { - unsigned char *copy; - size_t copy_len = 0; - int retval = -1; - - if ((copy = (unsigned char *) malloc(data_len + 10)) == NULL) { - return -1; - } - - copy[0] = 0x80 + (opcode & 0x0f); - - // Frame format: http://tools.ietf.org/html/rfc6455#section-5.2 - if (data_len < 126) { - // Inline 7-bit length field - copy[1] = data_len; - memcpy(copy + 2, data, data_len); - copy_len = 2 + data_len; - } else if (data_len <= 0xFFFF) { - // 16-bit length field - copy[1] = 126; - * (uint16_t *) (copy + 2) = htons(data_len); - memcpy(copy + 4, data, data_len); - copy_len = 4 + data_len; - } else { - // 64-bit length field - copy[1] = 127; - * (uint32_t *) (copy + 2) = htonl((uint64_t) data_len >> 32); - * (uint32_t *) (copy + 6) = htonl(data_len & 0xffffffff); - memcpy(copy + 10, data, data_len); - copy_len = 10 + data_len; - } - - // Not thread safe - if (copy_len > 0) { - retval = mg_write(conn, copy, copy_len); - } - free(copy); - - return retval; -} - -static void handle_websocket_request(struct mg_connection *conn) { - const char *version = mg_get_header(conn, "Sec-WebSocket-Version"); - if (version == NULL || strcmp(version, "13") != 0) { - send_http_error(conn, 426, "Upgrade Required", "%s", "Upgrade Required"); - } else if (conn->ctx->callbacks.websocket_connect != NULL && - conn->ctx->callbacks.websocket_connect(conn) != 0) { - // Callback has returned non-zero, do not proceed with handshake - } else { - send_websocket_handshake(conn); - if (conn->ctx->callbacks.websocket_ready != NULL) { - conn->ctx->callbacks.websocket_ready(conn); - } - read_websocket(conn); - } -} - -static int is_websocket_request(const struct mg_connection *conn) { - const char *host, *upgrade, *connection, *version, *key; - - host = mg_get_header(conn, "Host"); - upgrade = mg_get_header(conn, "Upgrade"); - connection = mg_get_header(conn, "Connection"); - key = mg_get_header(conn, "Sec-WebSocket-Key"); - version = mg_get_header(conn, "Sec-WebSocket-Version"); - - return host != NULL && upgrade != NULL && connection != NULL && - key != NULL && version != NULL && - mg_strcasestr(upgrade, "websocket") != NULL && - mg_strcasestr(connection, "Upgrade") != NULL; -} -#endif // !USE_WEBSOCKET +static void send_continue_if_expected(struct connection *conn) { + static const char expect_response[] = "HTTP/1.1 100 Continue\r\n\r\n"; + const char *expect_hdr = mg_get_header(&conn->mg_conn, "Expect"); -static int isbyte(int n) { - return n >= 0 && n <= 255; + if (expect_hdr != NULL && !mg_strcasecmp(expect_hdr, "100-continue")) { + ns_send(conn->ns_conn, expect_response, sizeof(expect_response) - 1); + } } -static int parse_net(const char *spec, uint32_t *net, uint32_t *mask) { - int n, a, b, c, d, slash = 32, len = 0; - - if ((sscanf(spec, "%d.%d.%d.%d/%d%n", &a, &b, &c, &d, &slash, &n) == 5 || - sscanf(spec, "%d.%d.%d.%d%n", &a, &b, &c, &d, &n) == 4) && - isbyte(a) && isbyte(b) && isbyte(c) && isbyte(d) && - slash >= 0 && slash < 33) { - len = n; - *net = ((uint32_t)a << 24) | ((uint32_t)b << 16) | ((uint32_t)c << 8) | d; - *mask = slash ? 0xffffffffU << (32 - slash) : 0; - } - - return len; -} - -static int set_throttle(const char *spec, uint32_t remote_ip, const char *uri) { - int throttle = 0; - struct vec vec, val; - uint32_t net, mask; - char mult; - double v; - - while ((spec = next_option(spec, &vec, &val)) != NULL) { - mult = ','; - if (sscanf(val.ptr, "%lf%c", &v, &mult) < 1 || v < 0 || - (lowercase(&mult) != 'k' && lowercase(&mult) != 'm' && mult != ',')) { - continue; - } - v *= lowercase(&mult) == 'k' ? 1024 : lowercase(&mult) == 'm' ? 1048576 : 1; - if (vec.len == 1 && vec.ptr[0] == '*') { - throttle = (int) v; - } else if (parse_net(vec.ptr, &net, &mask) > 0) { - if ((remote_ip & mask) == net) { - throttle = (int) v; - } - } else if (match_prefix(vec.ptr, vec.len, uri) > 0) { - throttle = (int) v; - } - } - - return throttle; -} - -static uint32_t get_remote_ip(const struct mg_connection *conn) { - return ntohl(* (uint32_t *) &conn->client.rsa.sin.sin_addr); -} - -#ifdef USE_LUA -#include "mod_lua.c" -#endif // USE_LUA - -int mg_upload(struct mg_connection *conn, const char *destination_dir) { - const char *content_type_header, *boundary_start; - char buf[MG_BUF_LEN], path[PATH_MAX], fname[1024], boundary[100], *s; - FILE *fp; - int bl, n, i, j, headers_len, boundary_len, eof, - len = 0, num_uploaded_files = 0; - - // Request looks like this: - // - // POST /upload HTTP/1.1 - // Host: 127.0.0.1:8080 - // Content-Length: 244894 - // Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryRVr - // - // ------WebKitFormBoundaryRVr - // Content-Disposition: form-data; name="file"; filename="accum.png" - // Content-Type: image/png - // - // <89>PNG - // <PNG DATA> - // ------WebKitFormBoundaryRVr - - // Extract boundary string from the Content-Type header - if ((content_type_header = mg_get_header(conn, "Content-Type")) == NULL || - (boundary_start = mg_strcasestr(content_type_header, - "boundary=")) == NULL || - (sscanf(boundary_start, "boundary=\"%99[^\"]\"", boundary) == 0 && - sscanf(boundary_start, "boundary=%99s", boundary) == 0) || - boundary[0] == '\0') { - return num_uploaded_files; - } - - boundary_len = strlen(boundary); - bl = boundary_len + 4; // \r\n--<boundary> - for (;;) { - // Pull in headers - assert(len >= 0 && len <= (int) sizeof(buf)); - while ((n = mg_read(conn, buf + len, sizeof(buf) - len)) > 0) { - len += n; - } - if ((headers_len = get_request_len(buf, len)) <= 0) { - break; - } - - // Fetch file name. - fname[0] = '\0'; - for (i = j = 0; i < headers_len; i++) { - if (buf[i] == '\r' && buf[i + 1] == '\n') { - buf[i] = buf[i + 1] = '\0'; - // TODO(lsm): don't expect filename to be the 3rd field, - // parse the header properly instead. - sscanf(&buf[j], "Content-Disposition: %*s %*s filename=\"%1023[^\"]", - fname); - j = i + 2; - } - } - - // Give up if the headers are not what we expect - if (fname[0] == '\0') { - break; - } - - // Move data to the beginning of the buffer - assert(len >= headers_len); - memmove(buf, &buf[headers_len], len - headers_len); - len -= headers_len; - - // We open the file with exclusive lock held. This guarantee us - // there is no other thread can save into the same file simultaneously. - fp = NULL; - // Construct destination file name. Do not allow paths to have slashes. - if ((s = strrchr(fname, '/')) == NULL && - (s = strrchr(fname, '\\')) == NULL) { - s = fname; - } - - // Open file in binary mode. TODO: set an exclusive lock. - snprintf(path, sizeof(path), "%s/%s", destination_dir, s); - if ((fp = fopen(path, "wb")) == NULL) { - break; - } - - // Read POST data, write into file until boundary is found. - eof = n = 0; - do { - len += n; - for (i = 0; i < len - bl; i++) { - if (!memcmp(&buf[i], "\r\n--", 4) && - !memcmp(&buf[i + 4], boundary, boundary_len)) { - // Found boundary, that's the end of file data. - fwrite(buf, 1, i, fp); - eof = 1; - memmove(buf, &buf[i + bl], len - (i + bl)); - len -= i + bl; - break; - } - } - if (!eof && len > bl) { - fwrite(buf, 1, len - bl, fp); - memmove(buf, &buf[len - bl], bl); - len = bl; - } - } while (!eof && (n = mg_read(conn, buf + len, sizeof(buf) - len)) > 0); - fclose(fp); - if (eof) { - num_uploaded_files++; - if (conn->ctx->callbacks.upload != NULL) { - conn->ctx->callbacks.upload(conn, path); - } - } - } - - return num_uploaded_files; -} - -static int is_put_or_delete_request(const struct mg_connection *conn) { - const char *s = conn->request_info.request_method; - return s != NULL && (!strcmp(s, "PUT") || !strcmp(s, "DELETE") || !strcmp(s, "MKCOL")); -} - -static int get_first_ssl_listener_index(const struct mg_context *ctx) { - int i, index = -1; - for (i = 0; index == -1 && i < ctx->num_listening_sockets; i++) { - index = ctx->listening_sockets[i].is_ssl ? i : -1; - } - return index; -} - -static void redirect_to_https_port(struct mg_connection *conn, int ssl_index) { - char host[1025]; - const char *host_header; - - if ((host_header = mg_get_header(conn, "Host")) == NULL || - sscanf(host_header, "%1024[^:]", host) == 0) { - // Cannot get host from the Host: header. Fallback to our IP address. - sockaddr_to_string(host, sizeof(host), &conn->client.lsa); - } - - mg_printf(conn, "HTTP/1.1 302 Found\r\nLocation: https://%s:%d%s\r\n\r\n", - host, (int) ntohs(conn->ctx->listening_sockets[ssl_index]. - lsa.sin.sin_port), conn->request_info.uri); -} - -// This is the heart of the Mongoose's logic. -// This function is called when the request is read, parsed and validated, -// and Mongoose must decide what action to take: serve a file, or -// a directory, or call embedded function, etcetera. -static void handle_request(struct mg_connection *conn) { - struct mg_request_info *ri = &conn->request_info; - char path[PATH_MAX]; - int uri_len, ssl_index; - struct file file = STRUCT_FILE_INITIALIZER; - - if ((conn->request_info.query_string = strchr(ri->uri, '?')) != NULL) { - * ((char *) conn->request_info.query_string++) = '\0'; - } - uri_len = (int) strlen(ri->uri); - mg_url_decode(ri->uri, uri_len, (char *) ri->uri, uri_len + 1, 0); - remove_double_dots_and_double_slashes((char *) ri->uri); - convert_uri_to_file_name(conn, path, sizeof(path), &file); - conn->throttle = set_throttle(conn->ctx->config[THROTTLE], - get_remote_ip(conn), ri->uri); - - DEBUG_TRACE(("%s", ri->uri)); - // Perform redirect and auth checks before calling begin_request() handler. - // Otherwise, begin_request() would need to perform auth checks and redirects. - if (!conn->client.is_ssl && conn->client.ssl_redir && - (ssl_index = get_first_ssl_listener_index(conn->ctx)) > -1) { - redirect_to_https_port(conn, ssl_index); - } else if (!is_put_or_delete_request(conn) && - !check_authorization(conn, path)) { - send_authorization_request(conn); - } else if (conn->ctx->callbacks.begin_request != NULL && - conn->ctx->callbacks.begin_request(conn)) { - // Do nothing, callback has served the request -#if defined(USE_WEBSOCKET) - } else if (is_websocket_request(conn)) { - handle_websocket_request(conn); +// Conform to http://www.w3.org/Protocols/rfc2616/rfc2616-sec5.html#sec5.1.2 +static int is_valid_uri(const char *uri) { + unsigned short n; + return uri[0] == '/' || + strcmp(uri, "*") == 0 || // OPTIONS method can use asterisk URI + memcmp(uri, "http", 4) == 0 || // Naive check for the absolute URI + sscanf(uri, "%*[^ :]:%hu", &n) > 0; // CONNECT method can use host:port +} + +static void try_parse(struct connection *conn) { + struct iobuf *io = &conn->ns_conn->recv_iobuf; + + if (conn->request_len == 0 && + (conn->request_len = get_request_len(io->buf, io->len)) > 0) { + // If request is buffered in, remove it from the iobuf. This is because + // iobuf could be reallocated, and pointers in parsed request could + // become invalid. + conn->request = (char *) malloc(conn->request_len); + memcpy(conn->request, io->buf, conn->request_len); + //DBG(("%p [%.*s]", conn, conn->request_len, conn->request)); + iobuf_remove(io, conn->request_len); + conn->request_len = parse_http_message(conn->request, conn->request_len, + &conn->mg_conn); + if (conn->request_len > 0) { + const char *cl_hdr = mg_get_header(&conn->mg_conn, "Content-Length"); + conn->cl = cl_hdr == NULL ? 0 : to64(cl_hdr); + conn->mg_conn.content_len = (size_t) conn->cl; + } + } +} + +static void do_proxy(struct connection *conn) { + if (conn->request_len == 0) { + DBG(("%p parsing", conn)); + try_parse(conn); + if (conn->request_len > 0 && + call_user(conn, MG_REQUEST) == MG_FALSE) { + proxy_request(conn->endpoint.nc, &conn->mg_conn); + } else if (conn->request_len < 0) { + ns_forward(conn->ns_conn, conn->endpoint.nc); + } + } else { + DBG(("%p forwarding", conn)); + ns_forward(conn->ns_conn, conn->endpoint.nc); + } +} + +static void on_recv_data(struct connection *conn) { + struct iobuf *io = &conn->ns_conn->recv_iobuf; + + if (conn->endpoint_type == EP_PROXY && conn->endpoint.nc != NULL) { + do_proxy(conn); + return; + } + + try_parse(conn); + DBG(("%p %d %zu %d", conn, conn->request_len, io->len, conn->ns_conn->flags)); + if (conn->request_len < 0 || + (conn->request_len > 0 && !is_valid_uri(conn->mg_conn.uri))) { + send_http_error(conn, 400, NULL); + } else if (conn->request_len == 0 && io->len > MAX_REQUEST_SIZE) { + send_http_error(conn, 413, NULL); + } else if (conn->request_len > 0 && + strcmp(conn->mg_conn.http_version, "1.0") != 0 && + strcmp(conn->mg_conn.http_version, "1.1") != 0) { + send_http_error(conn, 505, NULL); + } else if (conn->request_len > 0 && conn->endpoint_type == EP_NONE) { +#ifndef MONGOOSE_NO_WEBSOCKET + send_websocket_handshake_if_requested(&conn->mg_conn); #endif - } else if (!strcmp(ri->request_method, "OPTIONS")) { - send_options(conn); - } else if (conn->ctx->config[DOCUMENT_ROOT] == NULL) { - send_http_error(conn, 404, "Not Found", "Not Found"); - } else if (is_put_or_delete_request(conn) && - (is_authorized_for_put(conn) != 1)) { - send_authorization_request(conn); - } else if (!strcmp(ri->request_method, "PUT")) { - put_file(conn, path); - } else if (!strcmp(ri->request_method, "MKCOL")) { - mkcol(conn, path); - } else if (!strcmp(ri->request_method, "DELETE")) { - struct de de; - memset(&de.file, 0, sizeof(de.file)); - if(!mg_stat(conn, path, &de.file)) { - send_http_error(conn, 404, "Not Found", "%s", "File not found"); - } else { - if(de.file.modification_time) { - if(de.file.is_directory) { - remove_directory(conn, path); - send_http_error(conn, 204, "No Content", "%s", ""); - } else if (mg_remove(path) == 0) { - send_http_error(conn, 204, "No Content", "%s", ""); - } else { - send_http_error(conn, 423, "Locked", "remove(%s): %s", path, - strerror(ERRNO)); - } - } - else { - send_http_error(conn, 500, http_500_error, "remove(%s): %s", path, - strerror(ERRNO)); - } - } - } else if ((file.membuf == NULL && file.modification_time == (time_t) 0) || - must_hide_file(conn, path)) { - send_http_error(conn, 404, "Not Found", "%s", "File not found"); - } else if (file.is_directory && ri->uri[uri_len - 1] != '/') { - mg_printf(conn, "HTTP/1.1 301 Moved Permanently\r\n" - "Location: %s/\r\n\r\n", ri->uri); - } else if (!strcmp(ri->request_method, "PROPFIND")) { - handle_propfind(conn, path, &file); - } else if (file.is_directory && - !substitute_index_file(conn, path, sizeof(path), &file)) { - if (!mg_strcasecmp(conn->ctx->config[ENABLE_DIRECTORY_LISTING], "yes")) { - handle_directory_request(conn, path); - } else { - send_http_error(conn, 403, "Directory Listing Denied", - "Directory listing denied"); - } -#ifdef USE_LUA - } else if (match_prefix("**.lp$", 6, path) > 0) { - handle_lsp_request(conn, path, &file, NULL); + send_continue_if_expected(conn); + open_local_endpoint(conn, 0); + } + +#ifndef MONGOOSE_NO_CGI + if (conn->endpoint_type == EP_CGI && conn->endpoint.nc != NULL) { + ns_forward(conn->ns_conn, conn->endpoint.nc); + } #endif -#if !defined(NO_CGI) - } else if (match_prefix(conn->ctx->config[CGI_EXTENSIONS], - strlen(conn->ctx->config[CGI_EXTENSIONS]), - path) > 0) { - if (strcmp(ri->request_method, "POST") && - strcmp(ri->request_method, "HEAD") && - strcmp(ri->request_method, "GET")) { - send_http_error(conn, 501, "Not Implemented", - "Method %s is not implemented", ri->request_method); - } else { - handle_cgi_request(conn, path); - } -#endif // !NO_CGI - } else if (match_prefix(conn->ctx->config[SSI_EXTENSIONS], - strlen(conn->ctx->config[SSI_EXTENSIONS]), - path) > 0) { - handle_ssi_file_request(conn, path); - } else if (is_not_modified(conn, &file)) { - send_http_error(conn, 304, "Not Modified", "%s", ""); - } else { - handle_file_request(conn, path, &file); - } -} - -static void close_all_listening_sockets(struct mg_context *ctx) { - int i; - for (i = 0; i < ctx->num_listening_sockets; i++) { - closesocket(ctx->listening_sockets[i].sock); - } - free(ctx->listening_sockets); -} - -// Valid listening port specification is: [ip_address:]port[s] -// Examples: 80, 443s, 127.0.0.1:3128, 1.2.3.4:8080s -// TODO(lsm): add parsing of the IPv6 address -static int parse_port_string(const struct vec *vec, struct socket *so) { - int a, b, c, d, port, len; - - // MacOS needs that. If we do not zero it, subsequent bind() will fail. - // Also, all-zeroes in the socket address means binding to all addresses - // for both IPv4 and IPv6 (INADDR_ANY and IN6ADDR_ANY_INIT). - memset(so, 0, sizeof(*so)); - - if (sscanf(vec->ptr, "%d.%d.%d.%d:%d%n", &a, &b, &c, &d, &port, &len) == 5) { - // Bind to a specific IPv4 address - so->lsa.sin.sin_addr.s_addr = htonl((a << 24) | (b << 16) | (c << 8) | d); - } else if (sscanf(vec->ptr, "%d%n", &port, &len) != 1 || - len <= 0 || - len > (int) vec->len || - port < 1 || - port > 65535 || - (vec->ptr[len] && vec->ptr[len] != 's' && - vec->ptr[len] != 'r' && vec->ptr[len] != ',')) { - return 0; - } - - so->is_ssl = vec->ptr[len] == 's'; - so->ssl_redir = vec->ptr[len] == 'r'; -#if defined(USE_IPV6) - so->lsa.sin6.sin6_family = AF_INET6; - so->lsa.sin6.sin6_port = htons((uint16_t) port); -#else - so->lsa.sin.sin_family = AF_INET; - so->lsa.sin.sin_port = htons((uint16_t) port); + if (conn->endpoint_type == EP_USER) { + call_request_handler_if_data_is_buffered(conn); + } +#ifndef MONGOOSE_NO_DAV + if (conn->endpoint_type == EP_PUT && io->len > 0) { + forward_put_data(conn); + } #endif - - return 1; } -static int set_ports_option(struct mg_context *ctx) { - const char *list = ctx->config[LISTENING_PORTS]; - int on = 1, success = 1; -#if defined(USE_IPV6) - int off = 0; -#endif - struct vec vec; - struct socket so, *ptr; - - while (success && (list = next_option(list, &vec, NULL)) != NULL) { - if (!parse_port_string(&vec, &so)) { - cry(fc(ctx), "%s: %.*s: invalid port spec. Expecting list of: %s", - __func__, (int) vec.len, vec.ptr, "[IP_ADDRESS:]PORT[s|p]"); - success = 0; - } else if (so.is_ssl && ctx->ssl_ctx == NULL) { - cry(fc(ctx), "Cannot add SSL socket, is -ssl_certificate option set?"); - success = 0; - } else if ((so.sock = socket(so.lsa.sa.sa_family, SOCK_STREAM, 6)) == - INVALID_SOCKET || - // On Windows, SO_REUSEADDR is recommended only for - // broadcast UDP sockets - setsockopt(so.sock, SOL_SOCKET, SO_REUSEADDR, - (SETSOCKOPT_CAST) &on, sizeof(on)) != 0 || -#if defined(USE_IPV6) - setsockopt(so.sock, IPPROTO_IPV6, IPV6_V6ONLY, (SETSOCKOPT_CAST) &off, - sizeof(off)) != 0 || -#endif - bind(so.sock, &so.lsa.sa, sizeof(so.lsa)) != 0 || - listen(so.sock, SOMAXCONN) != 0) { - cry(fc(ctx), "%s: cannot bind to %.*s: %s", __func__, - (int) vec.len, vec.ptr, strerror(ERRNO)); - closesocket(so.sock); - success = 0; - } else if ((ptr = (struct socket*)realloc(ctx->listening_sockets, - (ctx->num_listening_sockets + 1) * - sizeof(ctx->listening_sockets[0]))) == NULL) { - closesocket(so.sock); - success = 0; - } else { - set_close_on_exec(so.sock); - ctx->listening_sockets = ptr; - ctx->listening_sockets[ctx->num_listening_sockets] = so; - ctx->num_listening_sockets++; - } - } - - if (!success) { - close_all_listening_sockets(ctx); - } - - return success; +static void call_http_client_handler(struct connection *conn) { + //conn->mg_conn.status_code = code; + // For responses without Content-Lengh, use the whole buffer + if (conn->cl == 0) { + conn->mg_conn.content_len = conn->ns_conn->recv_iobuf.len; + } + conn->mg_conn.content = conn->ns_conn->recv_iobuf.buf; + if (call_user(conn, MG_REPLY) == MG_FALSE) { + conn->ns_conn->flags |= NSF_CLOSE_IMMEDIATELY; + } + iobuf_remove(&conn->ns_conn->recv_iobuf, conn->mg_conn.content_len); + conn->mg_conn.status_code = 0; + conn->cl = conn->num_bytes_sent = conn->request_len = 0; + free(conn->request); + conn->request = NULL; } -static void log_header(const struct mg_connection *conn, const char *header, - FILE *fp) { - const char *header_value; +static void process_response(struct connection *conn) { + struct iobuf *io = &conn->ns_conn->recv_iobuf; - if ((header_value = mg_get_header(conn, header)) == NULL) { - (void) fprintf(fp, "%s", " -"); - } else { - (void) fprintf(fp, " \"%s\"", header_value); - } + try_parse(conn); + DBG(("%p %d %zu", conn, conn->request_len, io->len)); + if (conn->request_len < 0 || + (conn->request_len == 0 && io->len > MAX_REQUEST_SIZE)) { + call_http_client_handler(conn); + } else if ((int64_t) io->len >= conn->cl) { + call_http_client_handler(conn); + } } -static void log_access(const struct mg_connection *conn) { - const struct mg_request_info *ri; - FILE *fp; - char date[64], src_addr[IP_ADDR_STR_LEN]; - - fp = conn->ctx->config[ACCESS_LOG_FILE] == NULL ? NULL : - fopen(conn->ctx->config[ACCESS_LOG_FILE], "a+"); +struct mg_connection *mg_connect(struct mg_server *server, const char *host, + int port, int use_ssl) { + struct ns_connection *nsconn; + struct connection *conn; - if (fp == NULL) - return; + nsconn = ns_connect(&server->ns_server, host, port, use_ssl, NULL); + if (nsconn == NULL) return 0; - strftime(date, sizeof(date), "%d/%b/%Y:%H:%M:%S %z", - localtime(&conn->birth_time)); + if ((conn = (struct connection *) calloc(1, sizeof(*conn))) == NULL) { + nsconn->flags |= NSF_CLOSE_IMMEDIATELY; + return 0; + } - ri = &conn->request_info; - flockfile(fp); + // Interlink two structs + conn->ns_conn = nsconn; + nsconn->connection_data = conn; - sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa); - fprintf(fp, "%s - %s [%s] \"%s %s HTTP/%s\" %d %" INT64_FMT, - src_addr, ri->remote_user == NULL ? "-" : ri->remote_user, date, - ri->request_method ? ri->request_method : "-", - ri->uri ? ri->uri : "-", ri->http_version, - conn->status_code, conn->num_bytes_sent); - log_header(conn, "Referer", fp); - log_header(conn, "User-Agent", fp); - fputc('\n', fp); - fflush(fp); + conn->server = server; + conn->endpoint_type = EP_CLIENT; + //conn->handler = handler; + conn->mg_conn.server_param = server->ns_server.server_data; + conn->ns_conn->flags = NSF_CONNECTING; - funlockfile(fp); - fclose(fp); + return &conn->mg_conn; } -// Verify given socket address against the ACL. -// Return -1 if ACL is malformed, 0 if address is disallowed, 1 if allowed. -static int check_acl(struct mg_context *ctx, uint32_t remote_ip) { - int allowed, flag; - uint32_t net, mask; - struct vec vec; - const char *list = ctx->config[ACCESS_CONTROL_LIST]; - - // If any ACL is set, deny by default - allowed = list == NULL ? '+' : '-'; - - while ((list = next_option(list, &vec, NULL)) != NULL) { - flag = vec.ptr[0]; - if ((flag != '+' && flag != '-') || - parse_net(&vec.ptr[1], &net, &mask) == 0) { - cry(fc(ctx), "%s: subnet must be [+|-]x.x.x.x[/x]", __func__); - return -1; - } - - if (net == (remote_ip & mask)) { - allowed = flag; - } - } - - return allowed == '+'; -} - -#if !defined(_WIN32) -static int set_uid_option(struct mg_context *ctx) { - struct passwd *pw; - const char *uid = ctx->config[RUN_AS_USER]; - int success = 0; - - if (uid == NULL) { - success = 1; - } else { - if ((pw = getpwnam(uid)) == NULL) { - cry(fc(ctx), "%s: unknown user [%s]", __func__, uid); - } else if (setgid(pw->pw_gid) == -1) { - cry(fc(ctx), "%s: setgid(%s): %s", __func__, uid, strerror(errno)); - } else if (setuid(pw->pw_uid) == -1) { - cry(fc(ctx), "%s: setuid(%s): %s", __func__, uid, strerror(errno)); - } else { - success = 1; - } - } - - return success; -} -#endif // !_WIN32 - -#if !defined(NO_SSL) -static pthread_mutex_t *ssl_mutexes; - -static int sslize(struct mg_connection *conn, SSL_CTX *s, int (*func)(SSL *)) { - return (conn->ssl = SSL_new(s)) != NULL && - SSL_set_fd(conn->ssl, conn->client.sock) == 1 && - func(conn->ssl) == 1; -} - -// Return OpenSSL error message -static const char *ssl_error(void) { - unsigned long err; - err = ERR_get_error(); - return err == 0 ? "" : ERR_error_string(err, NULL); -} - -static void ssl_locking_callback(int mode, int mutex_num, const char *file, - int line) { - (void) line; - (void) file; - - if (mode & 1) { // 1 is CRYPTO_LOCK - (void) pthread_mutex_lock(&ssl_mutexes[mutex_num]); - } else { - (void) pthread_mutex_unlock(&ssl_mutexes[mutex_num]); - } -} - -static unsigned long ssl_id_callback(void) { - return (unsigned long) pthread_self(); -} - -#if !defined(NO_SSL_DL) -static int load_dll(struct mg_context *ctx, const char *dll_name, - struct ssl_func *sw) { - union {void *p; void (*fp)(void);} u; - void *dll_handle; - struct ssl_func *fp; - - if ((dll_handle = dlopen(dll_name, RTLD_LAZY)) == NULL) { - cry(fc(ctx), "%s: cannot load %s", __func__, dll_name); - return 0; - } - - for (fp = sw; fp->name != NULL; fp++) { -#ifdef _WIN32 - // GetProcAddress() returns pointer to function - u.fp = (void (*)(void)) dlsym(dll_handle, fp->name); -#else - // dlsym() on UNIX returns void *. ISO C forbids casts of data pointers to - // function pointers. We need to use a union to make a cast. - u.p = dlsym(dll_handle, fp->name); -#endif // _WIN32 - if (u.fp == NULL) { - cry(fc(ctx), "%s: %s: cannot find %s", __func__, dll_name, fp->name); - return 0; - } else { - fp->ptr = u.fp; - } - } - - return 1; -} -#endif // NO_SSL_DL - -// Dynamically load SSL library. Set up ctx->ssl_ctx pointer. -static int set_ssl_option(struct mg_context *ctx) { - int i, size; - const char *pem; - - // If PEM file is not specified, skip SSL initialization. - if ((pem = ctx->config[SSL_CERTIFICATE]) == NULL) { - return 1; - } - -#if !defined(NO_SSL_DL) - if (!load_dll(ctx, SSL_LIB, ssl_sw) || - !load_dll(ctx, CRYPTO_LIB, crypto_sw)) { - return 0; - } -#endif // NO_SSL_DL - - // Initialize SSL library - SSL_library_init(); - SSL_load_error_strings(); - - if ((ctx->ssl_ctx = SSL_CTX_new(SSLv23_server_method())) == NULL) { - cry(fc(ctx), "SSL_CTX_new (server) error: %s", ssl_error()); - return 0; - } - - // If user callback returned non-NULL, that means that user callback has - // set up certificate itself. In this case, skip sertificate setting. - if ((ctx->callbacks.init_ssl == NULL || - !ctx->callbacks.init_ssl(ctx->ssl_ctx, ctx->user_data)) && - (SSL_CTX_use_certificate_file(ctx->ssl_ctx, pem, 1) == 0 || - SSL_CTX_use_PrivateKey_file(ctx->ssl_ctx, pem, 1) == 0)) { - cry(fc(ctx), "%s: cannot open %s: %s", __func__, pem, ssl_error()); - return 0; - } - - if (pem != NULL) { - (void) SSL_CTX_use_certificate_chain_file(ctx->ssl_ctx, pem); - } - - // Initialize locking callbacks, needed for thread safety. - // http://www.openssl.org/support/faq.html#PROG1 - size = sizeof(pthread_mutex_t) * CRYPTO_num_locks(); - if ((ssl_mutexes = (pthread_mutex_t *) malloc((size_t)size)) == NULL) { - cry(fc(ctx), "%s: cannot allocate mutexes: %s", __func__, ssl_error()); - return 0; - } - - for (i = 0; i < CRYPTO_num_locks(); i++) { - pthread_mutex_init(&ssl_mutexes[i], NULL); - } - - CRYPTO_set_locking_callback(&ssl_locking_callback); - CRYPTO_set_id_callback(&ssl_id_callback); - - return 1; -} - -static void uninitialize_ssl(struct mg_context *ctx) { - int i; - if (ctx->ssl_ctx != NULL) { - CRYPTO_set_locking_callback(NULL); - for (i = 0; i < CRYPTO_num_locks(); i++) { - pthread_mutex_destroy(&ssl_mutexes[i]); - } - CRYPTO_set_locking_callback(NULL); - CRYPTO_set_id_callback(NULL); - } -} -#endif // !NO_SSL - -static int set_gpass_option(struct mg_context *ctx) { - struct file file = STRUCT_FILE_INITIALIZER; - const char *path = ctx->config[GLOBAL_PASSWORDS_FILE]; - if (path != NULL && !mg_stat(fc(ctx), path, &file)) { - cry(fc(ctx), "Cannot open %s: %s", path, strerror(ERRNO)); - return 0; - } - return 1; -} - -static int set_acl_option(struct mg_context *ctx) { - return check_acl(ctx, (uint32_t) 0x7f000001UL) != -1; -} - -static void reset_per_request_attributes(struct mg_connection *conn) { - conn->path_info = NULL; - conn->num_bytes_sent = conn->consumed_content = 0; - conn->status_code = -1; - conn->must_close = conn->request_len = conn->throttle = 0; -} - -static void close_socket_gracefully(struct mg_connection *conn) { -#if defined(_WIN32) - char buf[MG_BUF_LEN]; - int n; +#ifndef MONGOOSE_NO_LOGGING +static void log_header(const struct mg_connection *conn, const char *header, + FILE *fp) { + const char *header_value; + + if ((header_value = mg_get_header(conn, header)) == NULL) { + (void) fprintf(fp, "%s", " -"); + } else { + (void) fprintf(fp, " \"%s\"", header_value); + } +} + +static void log_access(const struct connection *conn, const char *path) { + const struct mg_connection *c = &conn->mg_conn; + FILE *fp = (path == NULL) ? NULL : fopen(path, "a+"); + char date[64], user[100]; + time_t now; + + if (fp == NULL) return; + now = time(NULL); + strftime(date, sizeof(date), "%d/%b/%Y:%H:%M:%S %z", localtime(&now)); + + flockfile(fp); + mg_parse_header(mg_get_header(&conn->mg_conn, "Authorization"), "username", + user, sizeof(user)); + fprintf(fp, "%s - %s [%s] \"%s %s%s%s HTTP/%s\" %d %" INT64_FMT, + c->remote_ip, user[0] == '\0' ? "-" : user, date, + c->request_method ? c->request_method : "-", + c->uri ? c->uri : "-", c->query_string ? "?" : "", + c->query_string ? c->query_string : "", + c->http_version, c->status_code, conn->num_bytes_sent); + log_header(c, "Referer", fp); + log_header(c, "User-Agent", fp); + fputc('\n', fp); + fflush(fp); + + funlockfile(fp); + fclose(fp); +} #endif - struct linger linger; - - // Set linger option to avoid socket hanging out after close. This prevent - // ephemeral port exhaust problem under high QPS. - linger.l_onoff = 1; - linger.l_linger = 1; - setsockopt(conn->client.sock, SOL_SOCKET, SO_LINGER, - (char *) &linger, sizeof(linger)); - // Send FIN to the client - shutdown(conn->client.sock, SHUT_WR); - set_non_blocking_mode(conn->client.sock); - -#if defined(_WIN32) - // Read and discard pending incoming data. If we do not do that and close the - // socket, the data in the send buffer may be discarded. This - // behaviour is seen on Windows, when client keeps sending data - // when server decides to close the connection; then when client - // does recv() it gets no data back. - do { - n = pull(NULL, conn, buf, sizeof(buf)); - } while (n > 0); +static void close_local_endpoint(struct connection *conn) { + struct mg_connection *c = &conn->mg_conn; + // Must be done before free() + int keep_alive = should_keep_alive(&conn->mg_conn) && + (conn->endpoint_type == EP_FILE || conn->endpoint_type == EP_USER); + DBG(("%p %d %d %d", conn, conn->endpoint_type, keep_alive, + conn->ns_conn->flags)); + + switch (conn->endpoint_type) { + case EP_PUT: + case EP_FILE: + close(conn->endpoint.fd); + break; + case EP_CGI: + case EP_PROXY: + if (conn->endpoint.nc != NULL) { + DBG(("%p %p %p :-)", conn, conn->ns_conn, conn->endpoint.nc)); + conn->endpoint.nc->flags |= NSF_CLOSE_IMMEDIATELY; + conn->endpoint.nc->connection_data = NULL; + } + break; + default: break; + } + +#ifndef MONGOOSE_NO_LOGGING + if (c->status_code > 0 && conn->endpoint_type != EP_CLIENT && + c->status_code != 400) { + log_access(conn, conn->server->config_options[ACCESS_LOG_FILE]); + } #endif - // Now we know that our FIN is ACK-ed, safe to close - closesocket(conn->client.sock); -} + // Gobble possible POST data sent to the URI handler + iobuf_free(&conn->ns_conn->recv_iobuf); + free(conn->request); + free(conn->path_info); + + conn->endpoint_type = EP_NONE; + conn->cl = conn->num_bytes_sent = conn->request_len = 0; + conn->ns_conn->flags &= ~(NSF_FINISHED_SENDING_DATA | + NSF_BUFFER_BUT_DONT_SEND | NSF_CLOSE_IMMEDIATELY | + MG_HEADERS_SENT | MG_LONG_RUNNING); + c->num_headers = c->status_code = c->is_websocket = c->content_len = 0; + conn->endpoint.nc = NULL; + c->request_method = c->uri = c->http_version = c->query_string = NULL; + conn->request = conn->path_info = NULL; + + if (keep_alive) { + on_recv_data(conn); // Can call us recursively if pipelining is used + } else { + conn->ns_conn->flags |= conn->ns_conn->send_iobuf.len == 0 ? + NSF_CLOSE_IMMEDIATELY : NSF_FINISHED_SENDING_DATA; + } +} + +static void transfer_file_data(struct connection *conn) { + char buf[IOBUF_SIZE]; + int n = read(conn->endpoint.fd, buf, conn->cl < (int64_t) sizeof(buf) ? + (int) conn->cl : (int) sizeof(buf)); + + if (n <= 0) { + close_local_endpoint(conn); + } else if (n > 0) { + conn->cl -= n; + ns_send(conn->ns_conn, buf, n); + if (conn->cl <= 0) { + close_local_endpoint(conn); + } + } +} + +int mg_poll_server(struct mg_server *server, int milliseconds) { + return ns_server_poll(&server->ns_server, milliseconds); +} + +void mg_destroy_server(struct mg_server **server) { + if (server != NULL && *server != NULL) { + struct mg_server *s = *server; + int i; + + ns_server_free(&s->ns_server); + for (i = 0; i < (int) ARRAY_SIZE(s->config_options); i++) { + free(s->config_options[i]); // It is OK to free(NULL) + } + free(s); + *server = NULL; + } +} + +struct mg_iterator { + mg_handler_t cb; + void *param; +}; -static void close_connection(struct mg_connection *conn) { - conn->must_close = 1; +static void iter(struct ns_connection *nsconn, enum ns_event ev, void *param) { + if (ev == NS_POLL) { + struct mg_iterator *it = (struct mg_iterator *) param; + struct connection *c = (struct connection *) nsconn->connection_data; + if (c != NULL) c->mg_conn.callback_param = it->param; + it->cb(&c->mg_conn, MG_POLL); + } +} + +// Apply function to all active connections. +void mg_iterate_over_connections(struct mg_server *server, mg_handler_t cb, + void *param) { + struct mg_iterator it = { cb, param }; + ns_iterate(&server->ns_server, iter, &it); +} + +static int get_var(const char *data, size_t data_len, const char *name, + char *dst, size_t dst_len) { + const char *p, *e, *s; + size_t name_len; + int len; + + if (dst == NULL || dst_len == 0) { + len = -2; + } else if (data == NULL || name == NULL || data_len == 0) { + len = -1; + dst[0] = '\0'; + } else { + name_len = strlen(name); + e = data + data_len; + len = -1; + dst[0] = '\0'; + + // data is "var1=val1&var2=val2...". Find variable first + for (p = data; p + name_len < e; p++) { + if ((p == data || p[-1] == '&') && p[name_len] == '=' && + !mg_strncasecmp(name, p, name_len)) { + + // Point p to variable value + p += name_len + 1; + + // Point s to the end of the value + s = (const char *) memchr(p, '&', (size_t)(e - p)); + if (s == NULL) { + s = e; + } + assert(s >= p); + + // Decode variable into destination buffer + len = mg_url_decode(p, (size_t)(s - p), dst, dst_len, 1); + + // Redirect error code from -1 to -2 (destination buffer too small). + if (len == -1) { + len = -2; + } + break; + } + } + } + + return len; +} + +int mg_get_var(const struct mg_connection *conn, const char *name, + char *dst, size_t dst_len) { + int len = get_var(conn->query_string, conn->query_string == NULL ? 0 : + strlen(conn->query_string), name, dst, dst_len); + if (len < 0) { + len = get_var(conn->content, conn->content_len, name, dst, dst_len); + } + return len; +} + +static int get_line_len(const char *buf, int buf_len) { + int len = 0; + while (len < buf_len && buf[len] != '\n') len++; + return buf[len] == '\n' ? len + 1: -1; +} + +int mg_parse_multipart(const char *buf, int buf_len, + char *var_name, int var_name_len, + char *file_name, int file_name_len, + const char **data, int *data_len) { + static const char cd[] = "Content-Disposition: "; + //struct mg_connection c; + int hl, bl, n, ll, pos, cdl = sizeof(cd) - 1; + //char *p; + + if (buf == NULL || buf_len <= 0) return 0; + if ((hl = get_request_len(buf, buf_len)) <= 0) return 0; + if (buf[0] != '-' || buf[1] != '-' || buf[2] == '\n') return 0; + + // Get boundary length + bl = get_line_len(buf, buf_len); + + // Loop through headers, fetch variable name and file name + var_name[0] = file_name[0] = '\0'; + for (n = bl; (ll = get_line_len(buf + n, hl - n)) > 0; n += ll) { + if (mg_strncasecmp(cd, buf + n, cdl) == 0) { + parse_header(buf + n + cdl, ll - (cdl + 2), "name", + var_name, var_name_len); + parse_header(buf + n + cdl, ll - (cdl + 2), "filename", + file_name, file_name_len); + } + } + + // Scan body, search for terminating boundary + for (pos = hl; pos + (bl - 2) < buf_len; pos++) { + if (buf[pos] == '-' && !memcmp(buf, &buf[pos], bl - 2)) { + if (data_len != NULL) *data_len = (pos - 2) - hl; + if (data != NULL) *data = buf + hl; + return pos; + } + } + + return 0; +} -#ifndef NO_SSL - if (conn->ssl != NULL) { - // Run SSL_shutdown twice to ensure completly close SSL connection - SSL_shutdown(conn->ssl); - SSL_free(conn->ssl); - conn->ssl = NULL; - } -#endif - if (conn->client.sock != INVALID_SOCKET) { - close_socket_gracefully(conn); - conn->client.sock = INVALID_SOCKET; - } +const char **mg_get_valid_option_names(void) { + return static_config_options; } -void mg_close_connection(struct mg_connection *conn) { -#ifndef NO_SSL - if (conn->client_ssl_ctx != NULL) { - SSL_CTX_free((SSL_CTX *) conn->client_ssl_ctx); - } +static int get_option_index(const char *name) { + int i; + + for (i = 0; static_config_options[i * 2] != NULL; i++) { + if (strcmp(static_config_options[i * 2], name) == 0) { + return i; + } + } + return -1; +} + +static void set_default_option_values(char **opts) { + const char *value, **all_opts = mg_get_valid_option_names(); + int i; + + for (i = 0; all_opts[i * 2] != NULL; i++) { + value = all_opts[i * 2 + 1]; + if (opts[i] == NULL && value != NULL) { + opts[i] = mg_strdup(value); + } + } +} + +const char *mg_set_option(struct mg_server *server, const char *name, + const char *value) { + int ind = get_option_index(name); + const char *error_msg = NULL; + char **v = NULL; + + if (ind < 0) return "No such option"; + v = &server->config_options[ind]; + + // Return success immediately if setting to the same value + if ((*v == NULL && value == NULL) || + (value != NULL && *v != NULL && !strcmp(value, *v))) { + return NULL; + } + + if (*v != NULL) { + free(*v); + *v = NULL; + } + + if (value == NULL || value[0] == '\0') return NULL; + + *v = mg_strdup(value); + DBG(("%s [%s]", name, *v)); + + if (ind == LISTENING_PORT) { + int port = ns_bind(&server->ns_server, value); + if (port < 0) { + error_msg = "Cannot bind to port"; + } else { + if (!strcmp(value, "0")) { + char buf[10]; + mg_snprintf(buf, sizeof(buf), "%d", port); + free(*v); + *v = mg_strdup(buf); + } + } +#ifndef _WIN32 + } else if (ind == RUN_AS_USER) { + struct passwd *pw; + if ((pw = getpwnam(value)) == NULL) { + error_msg = "Unknown user"; + } else if (setgid(pw->pw_gid) != 0) { + error_msg = "setgid() failed"; + } else if (setuid(pw->pw_uid) != 0) { + error_msg = "setuid() failed"; + } #endif - close_connection(conn); - free(conn); -} - -struct mg_connection *mg_connect(const char *host, int port, int use_ssl, - char *ebuf, size_t ebuf_len) { - static struct mg_context fake_ctx; - struct mg_connection *conn = NULL; - SOCKET sock; - - if ((sock = conn2(host, port, use_ssl, ebuf, ebuf_len)) == INVALID_SOCKET) { - } else if ((conn = (struct mg_connection *) - calloc(1, sizeof(*conn) + MAX_REQUEST_SIZE)) == NULL) { - snprintf(ebuf, ebuf_len, "calloc(): %s", strerror(ERRNO)); - closesocket(sock); -#ifndef NO_SSL - } else if (use_ssl && (conn->client_ssl_ctx = - SSL_CTX_new(SSLv23_client_method())) == NULL) { - snprintf(ebuf, ebuf_len, "SSL_CTX_new error"); - closesocket(sock); - free(conn); - conn = NULL; -#endif // NO_SSL - } else { - socklen_t len; - conn->buf_size = MAX_REQUEST_SIZE; - conn->buf = (char *) (conn + 1); - conn->ctx = &fake_ctx; - conn->client.sock = sock; - getsockname(sock, &conn->client.rsa.sa, &len); - conn->client.is_ssl = use_ssl; -#ifndef NO_SSL - if (use_ssl) { - // SSL_CTX_set_verify call is needed to switch off server certificate - // checking, which is off by default in OpenSSL and on in yaSSL. - SSL_CTX_set_verify(conn->client_ssl_ctx, 0, 0); - sslize(conn, conn->client_ssl_ctx, SSL_connect); - } +#ifdef NS_ENABLE_SSL + } else if (ind == SSL_CERTIFICATE) { + int res = ns_set_ssl_cert(&server->ns_server, value); + if (res == -2) { + error_msg = "Cannot load PEM"; + } else if (res == -3) { + error_msg = "SSL not enabled"; + } else if (res == -1) { + error_msg = "SSL_CTX_new() failed"; + } + } else if (ind == SSL_CA_CERTIFICATE) { + if (ns_set_ssl_ca_cert(&server->ns_server, value) != 0) { + error_msg = "Error setting CA cert"; + } #endif - } - - return conn; + } + + return error_msg; +} + +static void set_ips(struct ns_connection *nc, int is_rem) { + struct connection *conn = (struct connection *) nc->connection_data; + struct mg_connection *c = &conn->mg_conn; + char buf[100]; + + ns_sock_to_str(nc->sock, buf, sizeof(buf), is_rem ? 7 : 3); + sscanf(buf, "%47[^:]:%hu", + is_rem ? c->remote_ip : c->local_ip, + is_rem ? &c->remote_port : &c->local_port); + //DBG(("%p %s %s", conn, is_rem ? "rem" : "loc", buf)); +} + +static void on_accept(struct ns_connection *nc, union socket_address *sa) { + struct mg_server *server = (struct mg_server *) nc->server; + struct connection *conn; + + if (!check_acl(server->config_options[ACCESS_CONTROL_LIST], + ntohl(* (uint32_t *) &sa->sin.sin_addr)) || + (conn = (struct connection *) calloc(1, sizeof(*conn))) == NULL) { + nc->flags |= NSF_CLOSE_IMMEDIATELY; + } else { + // Circularly link two connection structures + nc->connection_data = conn; + conn->ns_conn = nc; + + // Initialize the rest of connection attributes + conn->server = server; + conn->mg_conn.server_param = nc->server->server_data; + set_ips(nc, 1); + set_ips(nc, 0); + } +} + +#ifndef MONGOOSE_NO_FILESYSTEM +static void hexdump(struct ns_connection *nc, const char *path, + int num_bytes, int is_sent) { + const struct iobuf *io = is_sent ? &nc->send_iobuf : &nc->recv_iobuf; + FILE *fp; + char *buf, src[60], dst[60]; + int buf_size = num_bytes * 5 + 100; + + if (path != NULL && (fp = fopen(path, "a")) != NULL) { + ns_sock_to_str(nc->sock, src, sizeof(src), 3); + ns_sock_to_str(nc->sock, dst, sizeof(dst), 7); + fprintf(fp, "%lu %p %s %s %s %d\n", (unsigned long) time(NULL), + nc->connection_data, src, + is_sent == 0 ? "<-" : is_sent == 1 ? "->" : + is_sent == 2 ? "<A" : "C>", dst, num_bytes); + if (num_bytes > 0 && (buf = (char *) malloc(buf_size)) != NULL) { + ns_hexdump(io->buf + (is_sent ? 0 : io->len) - (is_sent ? 0 : num_bytes), + num_bytes, buf, buf_size); + fprintf(fp, "%s", buf); + free(buf); + } + fclose(fp); + } } - -static int is_valid_uri(const char *uri) { - // Conform to http://www.w3.org/Protocols/rfc2616/rfc2616-sec5.html#sec5.1.2 - // URI can be an asterisk (*) or should start with slash. - return uri[0] == '/' || (uri[0] == '*' && uri[1] == '\0'); -} - -static int getreq(struct mg_connection *conn, char *ebuf, size_t ebuf_len) { - const char *cl; - - ebuf[0] = '\0'; - reset_per_request_attributes(conn); - conn->request_len = read_request(NULL, conn, conn->buf, conn->buf_size, - &conn->data_len); - assert(conn->request_len < 0 || conn->data_len >= conn->request_len); - - if (conn->request_len == 0 && conn->data_len == conn->buf_size) { - snprintf(ebuf, ebuf_len, "%s", "Request Too Large"); - } else if (conn->request_len <= 0) { - snprintf(ebuf, ebuf_len, "%s", "Client closed connection"); - } else if (parse_http_message(conn->buf, conn->buf_size, - &conn->request_info) <= 0) { - snprintf(ebuf, ebuf_len, "Bad request: [%.*s]", conn->data_len, conn->buf); - } else { - // Request is valid - if ((cl = get_header(&conn->request_info, "Content-Length")) != NULL) { - conn->content_len = strtoll(cl, NULL, 10); - } else if (!mg_strcasecmp(conn->request_info.request_method, "POST") || - !mg_strcasecmp(conn->request_info.request_method, "PUT")) { - conn->content_len = -1; - } else { - conn->content_len = 0; - } - conn->birth_time = time(NULL); - } - return ebuf[0] == '\0'; -} - -struct mg_connection *mg_download(const char *host, int port, int use_ssl, - char *ebuf, size_t ebuf_len, - const char *fmt, ...) { - struct mg_connection *conn; - va_list ap; - - va_start(ap, fmt); - ebuf[0] = '\0'; - if ((conn = mg_connect(host, port, use_ssl, ebuf, ebuf_len)) == NULL) { - } else if (mg_vprintf(conn, fmt, ap) <= 0) { - snprintf(ebuf, ebuf_len, "%s", "Error sending request"); - } else { - getreq(conn, ebuf, ebuf_len); - } - if (ebuf[0] != '\0' && conn != NULL) { - mg_close_connection(conn); - conn = NULL; - } - - return conn; -} - -static void process_new_connection(struct mg_connection *conn) { - struct mg_request_info *ri = &conn->request_info; - int keep_alive_enabled, keep_alive, discard_len; - char ebuf[100]; - - keep_alive_enabled = !strcmp(conn->ctx->config[ENABLE_KEEP_ALIVE], "yes"); - keep_alive = 0; - - // Important: on new connection, reset the receiving buffer. Credit goes - // to crule42. - conn->data_len = 0; - do { - if (!getreq(conn, ebuf, sizeof(ebuf))) { - send_http_error(conn, 500, "Server Error", "%s", ebuf); - conn->must_close = 1; - } else if (!is_valid_uri(conn->request_info.uri)) { - snprintf(ebuf, sizeof(ebuf), "Invalid URI: [%s]", ri->uri); - send_http_error(conn, 400, "Bad Request", "%s", ebuf); - } else if (strcmp(ri->http_version, "1.0") && - strcmp(ri->http_version, "1.1")) { - snprintf(ebuf, sizeof(ebuf), "Bad HTTP version: [%s]", ri->http_version); - send_http_error(conn, 505, "Bad HTTP version", "%s", ebuf); - } - - if (ebuf[0] == '\0') { - handle_request(conn); - if (conn->ctx->callbacks.end_request != NULL) { - conn->ctx->callbacks.end_request(conn, conn->status_code); - } - log_access(conn); - } - if (ri->remote_user != NULL) { - free((void *) ri->remote_user); - // Important! When having connections with and without auth - // would cause double free and then crash - ri->remote_user = NULL; - } - - // NOTE(lsm): order is important here. should_keep_alive() call - // is using parsed request, which will be invalid after memmove's below. - // Therefore, memorize should_keep_alive() result now for later use - // in loop exit condition. - keep_alive = conn->ctx->stop_flag == 0 && keep_alive_enabled && - conn->content_len >= 0 && should_keep_alive(conn); - - // Discard all buffered data for this request - discard_len = conn->content_len >= 0 && conn->request_len > 0 && - conn->request_len + conn->content_len < (int64_t) conn->data_len ? - (int) (conn->request_len + conn->content_len) : conn->data_len; - assert(discard_len >= 0); - memmove(conn->buf, conn->buf + discard_len, conn->data_len - discard_len); - conn->data_len -= discard_len; - assert(conn->data_len >= 0); - assert(conn->data_len <= conn->buf_size); - } while (keep_alive); -} - -// Worker threads take accepted socket from the queue -static int consume_socket(struct mg_context *ctx, struct socket *sp) { - (void) pthread_mutex_lock(&ctx->mutex); - DEBUG_TRACE(("going idle")); - - // If the queue is empty, wait. We're idle at this point. - while (ctx->sq_head == ctx->sq_tail && ctx->stop_flag == 0) { - pthread_cond_wait(&ctx->sq_full, &ctx->mutex); - } - - // If we're stopping, sq_head may be equal to sq_tail. - if (ctx->sq_head > ctx->sq_tail) { - // Copy socket from the queue and increment tail - *sp = ctx->queue[ctx->sq_tail % ARRAY_SIZE(ctx->queue)]; - ctx->sq_tail++; - DEBUG_TRACE(("grabbed socket %d, going busy", sp->sock)); - - // Wrap pointers if needed - while (ctx->sq_tail > (int) ARRAY_SIZE(ctx->queue)) { - ctx->sq_tail -= ARRAY_SIZE(ctx->queue); - ctx->sq_head -= ARRAY_SIZE(ctx->queue); - } - } - - (void) pthread_cond_signal(&ctx->sq_empty); - (void) pthread_mutex_unlock(&ctx->mutex); - - return !ctx->stop_flag; -} - -static void *worker_thread(void *thread_func_param) { - struct mg_context *ctx = (struct mg_context *)thread_func_param; - struct mg_connection *conn; - - conn = (struct mg_connection *) calloc(1, sizeof(*conn) + MAX_REQUEST_SIZE); - if (conn == NULL) { - cry(fc(ctx), "%s", "Cannot create new connection struct, OOM"); - } else { - conn->buf_size = MAX_REQUEST_SIZE; - conn->buf = (char *) (conn + 1); - conn->ctx = ctx; - conn->request_info.user_data = ctx->user_data; - - // Call consume_socket() even when ctx->stop_flag > 0, to let it signal - // sq_empty condvar to wake up the master waiting in produce_socket() - while (consume_socket(ctx, &conn->client)) { - conn->birth_time = time(NULL); - - // Fill in IP, port info early so even if SSL setup below fails, - // error handler would have the corresponding info. - // Thanks to Johannes Winkelmann for the patch. - // TODO(lsm): Fix IPv6 case - conn->request_info.remote_port = ntohs(conn->client.rsa.sin.sin_port); - memcpy(&conn->request_info.remote_ip, - &conn->client.rsa.sin.sin_addr.s_addr, 4); - conn->request_info.remote_ip = ntohl(conn->request_info.remote_ip); - conn->request_info.is_ssl = conn->client.is_ssl; - - if (!conn->client.is_ssl -#ifndef NO_SSL - || sslize(conn, conn->ctx->ssl_ctx, SSL_accept) #endif - ) { - process_new_connection(conn); - } - - close_connection(conn); - } - free(conn); - } - - // Signal master that we're done with connection and exiting - (void) pthread_mutex_lock(&ctx->mutex); - ctx->num_threads--; - (void) pthread_cond_signal(&ctx->cond); - assert(ctx->num_threads >= 0); - (void) pthread_mutex_unlock(&ctx->mutex); - DEBUG_TRACE(("exiting")); - return NULL; -} - -// Master thread adds accepted socket to a queue -static void produce_socket(struct mg_context *ctx, const struct socket *sp) { - (void) pthread_mutex_lock(&ctx->mutex); - - // If the queue is full, wait - while (ctx->stop_flag == 0 && - ctx->sq_head - ctx->sq_tail >= (int) ARRAY_SIZE(ctx->queue)) { - (void) pthread_cond_wait(&ctx->sq_empty, &ctx->mutex); - } - - if (ctx->sq_head - ctx->sq_tail < (int) ARRAY_SIZE(ctx->queue)) { - // Copy socket to the queue and increment head - ctx->queue[ctx->sq_head % ARRAY_SIZE(ctx->queue)] = *sp; - ctx->sq_head++; - DEBUG_TRACE(("queued socket %d", sp->sock)); - } - - (void) pthread_cond_signal(&ctx->sq_full); - (void) pthread_mutex_unlock(&ctx->mutex); -} +static void mg_ev_handler(struct ns_connection *nc, enum ns_event ev, void *p) { + struct connection *conn = (struct connection *) nc->connection_data; + struct mg_server *server = (struct mg_server *) nc->server; + + // Send NS event to the handler. Note that call_user won't send an event + // if conn == NULL. Therefore, repeat this for NS_ACCEPT event as well. +#ifdef MONGOOSE_SEND_NS_EVENTS + { + struct connection *conn = (struct connection *) nc->connection_data; + if (conn != NULL) conn->mg_conn.callback_param = p; + call_user(conn, (enum mg_event) ev); + } +#endif -static int set_sock_timeout(SOCKET sock, int milliseconds) { -#ifdef _WIN32 - DWORD t = milliseconds; -#else - struct timeval t; - t.tv_sec = milliseconds / 1000; - t.tv_usec = (milliseconds * 1000) % 1000000; + switch (ev) { + case NS_ACCEPT: + on_accept(nc, (union socket_address *) p); +#ifndef MONGOOSE_NO_FILESYSTEM + hexdump(nc, server->config_options[HEXDUMP_FILE], 0, 2); #endif - return setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, (SETSOCKOPT_CAST) &t, sizeof(t)) || - setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, (SETSOCKOPT_CAST) &t, sizeof(t)); -} - -static void accept_new_connection(const struct socket *listener, - struct mg_context *ctx) { - struct socket so; - char src_addr[IP_ADDR_STR_LEN]; - socklen_t len = sizeof(so.rsa); - int on = 1; - - if ((so.sock = accept(listener->sock, &so.rsa.sa, &len)) == INVALID_SOCKET) { - } else if (!check_acl(ctx, ntohl(* (uint32_t *) &so.rsa.sin.sin_addr))) { - sockaddr_to_string(src_addr, sizeof(src_addr), &so.rsa); - cry(fc(ctx), "%s: %s is not allowed to connect", __func__, src_addr); - closesocket(so.sock); - } else { - // Put so socket structure into the queue - DEBUG_TRACE(("Accepted socket %d", (int) so.sock)); - so.is_ssl = listener->is_ssl; - so.ssl_redir = listener->ssl_redir; - getsockname(so.sock, &so.lsa.sa, &len); - // Set TCP keep-alive. This is needed because if HTTP-level keep-alive - // is enabled, and client resets the connection, server won't get - // TCP FIN or RST and will keep the connection open forever. With TCP - // keep-alive, next keep-alive handshake will figure out that the client - // is down and will close the server end. - // Thanks to Igor Klopov who suggested the patch. - setsockopt(so.sock, SOL_SOCKET, SO_KEEPALIVE, (SETSOCKOPT_CAST) &on, sizeof(on)); - set_sock_timeout(so.sock, atoi(ctx->config[REQUEST_TIMEOUT])); - produce_socket(ctx, &so); - } -} - -static void *master_thread(void *thread_func_param) { - struct mg_context *ctx = (struct mg_context *)thread_func_param; - struct pollfd *pfd; - int i; - - // Increase priority of the master thread -#if defined(_WIN32) - SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_ABOVE_NORMAL); +#ifdef MONGOOSE_SEND_NS_EVENTS + { + struct connection *conn = (struct connection *) nc->connection_data; + if (conn != NULL) conn->mg_conn.callback_param = p; + call_user(conn, (enum mg_event) ev); + } #endif - -#if defined(ISSUE_317) - struct sched_param sched_param; - sched_param.sched_priority = sched_get_priority_max(SCHED_RR); - pthread_setschedparam(pthread_self(), SCHED_RR, &sched_param); + break; + + case NS_CONNECT: + if (nc->connection_data != NULL) { + set_ips(nc, 1); + set_ips(nc, 0); + } +#ifndef MONGOOSE_NO_FILESYSTEM + hexdump(nc, server->config_options[HEXDUMP_FILE], 0, 3); #endif - - pfd = (struct pollfd *)calloc(ctx->num_listening_sockets, sizeof(pfd[0])); - while (pfd != NULL && ctx->stop_flag == 0) { - for (i = 0; i < ctx->num_listening_sockets; i++) { - pfd[i].fd = ctx->listening_sockets[i].sock; - pfd[i].events = POLLIN; - } - - if (poll(pfd, ctx->num_listening_sockets, 200) > 0) { - for (i = 0; i < ctx->num_listening_sockets; i++) { - // NOTE(lsm): on QNX, poll() returns POLLRDNORM after the - // successfull poll, and POLLIN is defined as (POLLRDNORM | POLLRDBAND) - // Therefore, we're checking pfd[i].revents & POLLIN, not - // pfd[i].revents == POLLIN. - if (ctx->stop_flag == 0 && (pfd[i].revents & POLLIN)) { - accept_new_connection(&ctx->listening_sockets[i], ctx); - } - } - } - } - free(pfd); - DEBUG_TRACE(("stopping workers")); - - // Stop signal received: somebody called mg_stop. Quit. - close_all_listening_sockets(ctx); - - // Wakeup workers that are waiting for connections to handle. - pthread_cond_broadcast(&ctx->sq_full); - - // Wait until all threads finish - (void) pthread_mutex_lock(&ctx->mutex); - while (ctx->num_threads > 0) { - (void) pthread_cond_wait(&ctx->cond, &ctx->mutex); - } - (void) pthread_mutex_unlock(&ctx->mutex); - - // All threads exited, no sync is needed. Destroy mutex and condvars - (void) pthread_mutex_destroy(&ctx->mutex); - (void) pthread_cond_destroy(&ctx->cond); - (void) pthread_cond_destroy(&ctx->sq_empty); - (void) pthread_cond_destroy(&ctx->sq_full); - -#if !defined(NO_SSL) - uninitialize_ssl(ctx); + conn->mg_conn.status_code = * (int *) p; + if (conn->mg_conn.status_code != 0 || + (!(nc->flags & MG_PROXY_CONN) && + call_user(conn, MG_CONNECT) == MG_FALSE)) { + nc->flags |= NSF_CLOSE_IMMEDIATELY; + } + break; + + case NS_RECV: +#ifndef MONGOOSE_NO_FILESYSTEM + hexdump(nc, server->config_options[HEXDUMP_FILE], * (int *) p, 0); #endif - DEBUG_TRACE(("exiting")); - - // Signal mg_stop() that we're done. - // WARNING: This must be the very last thing this - // thread does, as ctx becomes invalid after this line. - ctx->stop_flag = 2; - return NULL; -} - -static void free_context(struct mg_context *ctx) { - int i; - - // Deallocate config parameters - for (i = 0; i < NUM_OPTIONS; i++) { - if (ctx->config[i] != NULL) - free(ctx->config[i]); - } - -#ifndef NO_SSL - // Deallocate SSL context - if (ctx->ssl_ctx != NULL) { - SSL_CTX_free(ctx->ssl_ctx); - } - if (ssl_mutexes != NULL) { - free(ssl_mutexes); - ssl_mutexes = NULL; - } -#endif // !NO_SSL - - // Deallocate context itself - free(ctx); -} - -void mg_stop(struct mg_context *ctx) { - if (!ctx) return; - ctx->stop_flag = 1; - - // Wait until mg_fini() stops - while (ctx->stop_flag != 2) { - (void) mg_sleep(10); - } - free_context(ctx); - -#if defined(_WIN32) && !defined(__SYMBIAN32__) - (void) WSACleanup(); -#endif // _WIN32 -} - -struct mg_context *mg_start(const struct mg_callbacks *callbacks, - void *user_data, - const char **options) { - struct mg_context *ctx; - const char *name, *value, *default_value; - int i; - -#if defined(_WIN32) && !defined(__SYMBIAN32__) - WSADATA data; - WSAStartup(MAKEWORD(2,2), &data); - InitializeCriticalSection(&global_log_file_lock); -#endif // _WIN32 - - // Allocate context and initialize reasonable general case defaults. - // TODO(lsm): do proper error handling here. - if ((ctx = (struct mg_context *) calloc(1, sizeof(*ctx))) == NULL) { - return NULL; - } - ctx->callbacks = *callbacks; - ctx->user_data = user_data; - - while (options && (name = *options++) != NULL) { - if ((i = get_option_index(name)) == -1) { - cry(fc(ctx), "Invalid option: %s", name); - free_context(ctx); - return NULL; - } else if ((value = *options++) == NULL) { - cry(fc(ctx), "%s: option value cannot be NULL", name); - free_context(ctx); - return NULL; - } - if (ctx->config[i] != NULL) { - cry(fc(ctx), "warning: %s: duplicate option", name); - free(ctx->config[i]); - } - ctx->config[i] = mg_strdup(value); - DEBUG_TRACE(("[%s] -> [%s]", name, value)); - } - - // Set default value if needed - for (i = 0; config_options[i * 2] != NULL; i++) { - default_value = config_options[i * 2 + 1]; - if (ctx->config[i] == NULL && default_value != NULL) { - ctx->config[i] = mg_strdup(default_value); - } - } - - // NOTE(lsm): order is important here. SSL certificates must - // be initialized before listening ports. UID must be set last. - if (!set_gpass_option(ctx) || -#if !defined(NO_SSL) - !set_ssl_option(ctx) || + if (nc->flags & NSF_ACCEPTED) { + on_recv_data(conn); +#ifndef MONGOOSE_NO_CGI + } else if (nc->flags & MG_CGI_CONN) { + on_cgi_data(nc); #endif - !set_ports_option(ctx) || -#if !defined(_WIN32) - !set_uid_option(ctx) || + } else if (nc->flags & MG_PROXY_CONN) { + if (conn != NULL) { + ns_forward(nc, conn->ns_conn); + } + } else { + process_response(conn); + } + break; + + case NS_SEND: +#ifndef MONGOOSE_NO_FILESYSTEM + hexdump(nc, server->config_options[HEXDUMP_FILE], * (int *) p, 1); #endif - !set_acl_option(ctx)) { - free_context(ctx); - return NULL; - } - -#if !defined(_WIN32) && !defined(__SYMBIAN32__) - // Ignore SIGPIPE signal, so if browser cancels the request, it - // won't kill the whole process. - (void) signal(SIGPIPE, SIG_IGN); - // Also ignoring SIGCHLD to let the OS to reap zombies properly. - (void) signal(SIGCHLD, SIG_IGN); -#endif // !_WIN32 - - (void) pthread_mutex_init(&ctx->mutex, NULL); - (void) pthread_cond_init(&ctx->cond, NULL); - (void) pthread_cond_init(&ctx->sq_empty, NULL); - (void) pthread_cond_init(&ctx->sq_full, NULL); - - // Start master (listening) thread - mg_start_thread(master_thread, ctx); - - // Start worker threads - for (i = 0; i < atoi(ctx->config[NUM_THREADS]); i++) { - if (mg_start_thread(worker_thread, ctx) != 0) { - cry(fc(ctx), "Cannot start worker thread: %ld", (long) ERRNO); - } else { - ctx->num_threads++; - } - } - - return ctx; + break; + + case NS_CLOSE: + nc->connection_data = NULL; + if (nc->flags & (MG_CGI_CONN | MG_PROXY_CONN)) { + DBG(("%p %p closing cgi/proxy conn", conn, nc)); + if (conn && conn->ns_conn) { + conn->ns_conn->flags &= ~NSF_BUFFER_BUT_DONT_SEND; + conn->ns_conn->flags |= conn->ns_conn->send_iobuf.len > 0 ? + NSF_FINISHED_SENDING_DATA : NSF_CLOSE_IMMEDIATELY; + conn->endpoint.nc = NULL; + } + } else if (conn != NULL) { + DBG(("%p %p %d closing", conn, nc, conn->endpoint_type)); + + if (conn->endpoint_type == EP_CLIENT && nc->recv_iobuf.len > 0) { + call_http_client_handler(conn); + } + + call_user(conn, MG_CLOSE); + close_local_endpoint(conn); + conn->ns_conn = NULL; + free(conn); + } + break; + + case NS_POLL: + if (call_user(conn, MG_POLL) == MG_TRUE) { + nc->flags |= NSF_FINISHED_SENDING_DATA; + } + + if (conn != NULL && conn->endpoint_type == EP_FILE) { + transfer_file_data(conn); + } + + // Expire idle connections + { + time_t current_time = * (time_t *) p; + + if (conn != NULL && conn->mg_conn.is_websocket) { + ping_idle_websocket_connection(conn, current_time); + } + + if (nc->last_io_time + MONGOOSE_IDLE_TIMEOUT_SECONDS < current_time) { + mg_ev_handler(nc, NS_CLOSE, NULL); + nc->flags |= NSF_CLOSE_IMMEDIATELY; + } + } + break; + + default: + break; + } +} + +static void iter2(struct ns_connection *nc, enum ns_event ev, void *param) { + mg_handler_t func = NULL; + struct connection *conn = (struct connection *) nc->connection_data; + const char *msg = (const char *) param; + int n; + (void) ev; + + //DBG(("%p [%s]", conn, msg)); + if (sscanf(msg, "%p %n", &func, &n) && func != NULL) { + conn->mg_conn.callback_param = (void *) (msg + n); + func(&conn->mg_conn, MG_POLL); + } +} + +void mg_wakeup_server_ex(struct mg_server *server, mg_handler_t cb, + const char *fmt, ...) { + va_list ap; + char buf[8 * 1024]; + int len; + + // Encode callback (cb) into a buffer + len = snprintf(buf, sizeof(buf), "%p ", cb); + va_start(ap, fmt); + len += vsnprintf(buf + len, sizeof(buf) - len, fmt, ap); + va_end(ap); + + // "len + 1" is to include terminating \0 in the message + ns_server_wakeup_ex(&server->ns_server, iter2, buf, len + 1); +} + +void mg_wakeup_server(struct mg_server *server) { + ns_server_wakeup_ex(&server->ns_server, NULL, (void *) "", 0); +} + +void mg_set_listening_socket(struct mg_server *server, int sock) { + if (server->ns_server.listening_sock != INVALID_SOCKET) { + closesocket(server->ns_server.listening_sock); + } + server->ns_server.listening_sock = (sock_t) sock; +} + +int mg_get_listening_socket(struct mg_server *server) { + return server->ns_server.listening_sock; +} + +const char *mg_get_option(const struct mg_server *server, const char *name) { + const char **opts = (const char **) server->config_options; + int i = get_option_index(name); + return i == -1 ? NULL : opts[i] == NULL ? "" : opts[i]; +} + +struct mg_server *mg_create_server(void *server_data, mg_handler_t handler) { + struct mg_server *server = (struct mg_server *) calloc(1, sizeof(*server)); + ns_server_init(&server->ns_server, server_data, mg_ev_handler); + set_default_option_values(server->config_options); + server->event_handler = handler; + return server; } diff --git a/src/lib/web/mongoose.h b/src/lib/web/mongoose.h index 64c3a174966..008a54580b8 100644 --- a/src/lib/web/mongoose.h +++ b/src/lib/web/mongoose.h @@ -1,380 +1,140 @@ -// Copyright (c) 2004-2012 Sergey Lyubka +// Copyright (c) 2004-2013 Sergey Lyubka <valenok@gmail.com> +// Copyright (c) 2013-2014 Cesanta Software Limited +// All rights reserved // -// Permission is hereby granted, free of charge, to any person obtaining a copy -// of this software and associated documentation files (the "Software"), to deal -// in the Software without restriction, including without limitation the rights -// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell -// copies of the Software, and to permit persons to whom the Software is -// furnished to do so, subject to the following conditions: +// This library is dual-licensed: you can redistribute it and/or modify +// it under the terms of the GNU General Public License version 2 as +// published by the Free Software Foundation. For the terms of this +// license, see <http://www.gnu.org/licenses/>. // -// The above copyright notice and this permission notice shall be included in -// all copies or substantial portions of the Software. +// You are free to use this library under the terms of the GNU General +// Public License, but WITHOUT ANY WARRANTY; without even the implied +// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. +// See the GNU General Public License for more details. // -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN -// THE SOFTWARE. +// Alternatively, you can license this library under a commercial +// license, as set out in <http://cesanta.com/>. +// +// NOTE: Detailed API documentation is at http://cesanta.com/#docs #ifndef MONGOOSE_HEADER_INCLUDED #define MONGOOSE_HEADER_INCLUDED -#include <stdio.h> -#include <stddef.h> +#define MONGOOSE_VERSION "5.4" + +#include <stdio.h> // required for FILE +#include <stddef.h> // required for size_t #ifdef __cplusplus extern "C" { #endif // __cplusplus -struct mg_context; // Handle for the HTTP service itself -struct mg_connection; // Handle for the individual connection - - -// This structure contains information about the HTTP request. -struct mg_request_info { - const char *request_method; // "GET", "POST", etc - const char *uri; // URL-decoded URI - const char *http_version; // E.g. "1.0", "1.1" - const char *query_string; // URL part after '?', not including '?', or NULL - const char *remote_user; // Authenticated user, or NULL if no auth used - long remote_ip; // Client's IP address - int remote_port; // Client's port - int is_ssl; // 1 if SSL-ed, 0 if not - void *user_data; // User data pointer passed to mg_start() - - int num_headers; // Number of HTTP headers - struct mg_header { - const char *name; // HTTP header name - const char *value; // HTTP header value - } http_headers[64]; // Maximum 64 headers +// This structure contains information about HTTP request. +struct mg_connection { + const char *request_method; // "GET", "POST", etc + const char *uri; // URL-decoded URI + const char *http_version; // E.g. "1.0", "1.1" + const char *query_string; // URL part after '?', not including '?', or NULL + + char remote_ip[48]; // Max IPv6 string length is 45 characters + char local_ip[48]; // Local IP address + unsigned short remote_port; // Client's port + unsigned short local_port; // Local port number + + int num_headers; // Number of HTTP headers + struct mg_header { + const char *name; // HTTP header name + const char *value; // HTTP header value + } http_headers[30]; + + char *content; // POST (or websocket message) data, or NULL + size_t content_len; // Data length + + int is_websocket; // Connection is a websocket connection + int status_code; // HTTP status code for HTTP error handler + int wsbits; // First byte of the websocket frame + void *server_param; // Parameter passed to mg_add_uri_handler() + void *connection_param; // Placeholder for connection-specific data + void *callback_param; // Needed by mg_iterate_over_connections() }; - -// This structure needs to be passed to mg_start(), to let mongoose know -// which callbacks to invoke. For detailed description, see -// https://github.com/valenok/mongoose/blob/master/UserManual.md -struct mg_callbacks { - // Called when mongoose has received new HTTP request. - // If callback returns non-zero, - // callback must process the request by sending valid HTTP headers and body, - // and mongoose will not do any further processing. - // If callback returns 0, mongoose processes the request itself. In this case, - // callback must not send any data to the client. - int (*begin_request)(struct mg_connection *); - - // Called when mongoose has finished processing request. - void (*end_request)(const struct mg_connection *, int reply_status_code); - - // Called when mongoose is about to log a message. If callback returns - // non-zero, mongoose does not log anything. - int (*log_message)(const struct mg_connection *, const char *message); - - // Called when mongoose initializes SSL library. - int (*init_ssl)(void *ssl_context, void *user_data); - - // Called when websocket request is received, before websocket handshake. - // If callback returns 0, mongoose proceeds with handshake, otherwise - // cinnection is closed immediately. - int (*websocket_connect)(const struct mg_connection *); - - // Called when websocket handshake is successfully completed, and - // connection is ready for data exchange. - void (*websocket_ready)(struct mg_connection *); - - // Called when data frame has been received from the client. - // Parameters: - // bits: first byte of the websocket frame, see websocket RFC at - // http://tools.ietf.org/html/rfc6455, section 5.2 - // data, data_len: payload, with mask (if any) already applied. - // Return value: - // non-0: keep this websocket connection opened. - // 0: close this websocket connection. - int (*websocket_data)(struct mg_connection *, int bits, - char *data, size_t data_len); - - // Called when mongoose tries to open a file. Used to intercept file open - // calls, and serve file data from memory instead. - // Parameters: - // path: Full path to the file to open. - // data_len: Placeholder for the file size, if file is served from memory. - // Return value: - // NULL: do not serve file from memory, proceed with normal file open. - // non-NULL: pointer to the file contents in memory. data_len must be - // initilized with the size of the memory block. - const char * (*open_file)(const struct mg_connection *, - const char *path, size_t *data_len); - - // Called when mongoose is about to serve Lua server page (.lp file), if - // Lua support is enabled. - // Parameters: - // lua_context: "lua_State *" pointer. - void (*init_lua)(struct mg_connection *, void *lua_context); - - // Called when mongoose has uploaded a file to a temporary directory as a - // result of mg_upload() call. - // Parameters: - // file_file: full path name to the uploaded file. - void (*upload)(struct mg_connection *, const char *file_name); - - // Called when mongoose is about to send HTTP error to the client. - // Implementing this callback allows to create custom error pages. - // Parameters: - // status: HTTP error status code. - int (*http_error)(struct mg_connection *, int status); +struct mg_server; // Opaque structure describing server instance +enum mg_result { MG_FALSE, MG_TRUE, MG_MORE }; +enum mg_event { + MG_POLL = 100, // Callback return value is ignored + MG_CONNECT, // If callback returns MG_FALSE, connect fails + MG_AUTH, // If callback returns MG_FALSE, authentication fails + MG_REQUEST, // If callback returns MG_FALSE, Mongoose continues with req + MG_REPLY, // If callback returns MG_FALSE, Mongoose closes connection + MG_CLOSE, // Connection is closed, callback return value is ignored + MG_WS_HANDSHAKE, // New websocket connection, handshake request + MG_HTTP_ERROR // If callback returns MG_FALSE, Mongoose continues with err }; +typedef int (*mg_handler_t)(struct mg_connection *, enum mg_event); -// Start web server. -// -// Parameters: -// callbacks: mg_callbacks structure with user-defined callbacks. -// options: NULL terminated list of option_name, option_value pairs that -// specify Mongoose configuration parameters. -// -// Side-effects: on UNIX, ignores SIGCHLD and SIGPIPE signals. If custom -// processing is required for these, signal handlers must be set up -// after calling mg_start(). -// -// -// Example: -// const char *options[] = { -// "document_root", "/var/www", -// "listening_ports", "80,443s", -// NULL -// }; -// struct mg_context *ctx = mg_start(&my_func, NULL, options); -// -// Refer to https://github.com/valenok/mongoose/blob/master/UserManual.md -// for the list of valid option and their possible values. -// -// Return: -// web server context, or NULL on error. -struct mg_context *mg_start(const struct mg_callbacks *callbacks, - void *user_data, - const char **configuration_options); - - -// Stop the web server. -// -// Must be called last, when an application wants to stop the web server and -// release all associated resources. This function blocks until all Mongoose -// threads are stopped. Context pointer becomes invalid. -void mg_stop(struct mg_context *); - - -// Get the value of particular configuration parameter. -// The value returned is read-only. Mongoose does not allow changing -// configuration at run time. -// If given parameter name is not valid, NULL is returned. For valid -// names, return value is guaranteed to be non-NULL. If parameter is not -// set, zero-length string is returned. -const char *mg_get_option(const struct mg_context *ctx, const char *name); - - -// Return array of strings that represent valid configuration options. -// For each option, a short name, long name, and default value is returned. -// Array is NULL terminated. -const char **mg_get_valid_option_names(void); - - -// Add, edit or delete the entry in the passwords file. -// -// This function allows an application to manipulate .htpasswd files on the -// fly by adding, deleting and changing user records. This is one of the -// several ways of implementing authentication on the server side. For another, -// cookie-based way please refer to the examples/chat.c in the source tree. -// -// If password is not NULL, entry is added (or modified if already exists). -// If password is NULL, entry is deleted. -// -// Return: -// 1 on success, 0 on error. -int mg_modify_passwords_file(const char *passwords_file_name, - const char *domain, - const char *user, - const char *password); - - -// Return information associated with the request. -struct mg_request_info *mg_get_request_info(struct mg_connection *); - - -// Send data to the client. -// Return: -// 0 when the connection has been closed -// -1 on error -// >0 number of bytes written on success -int mg_write(struct mg_connection *, const void *buf, size_t len); - - -// Send data to a websocket client wrapped in a websocket frame. -// It is unsafe to read/write to this connection from another thread. -// This function is available when mongoose is compiled with -DUSE_WEBSOCKET -// -// Return: -// 0 when the connection has been closed -// -1 on error -// >0 number of bytes written on success -int mg_websocket_write(struct mg_connection* conn, int opcode, - const char *data, size_t data_len); - -// Opcodes, from http://tools.ietf.org/html/rfc6455 +// Websocket opcodes, from http://tools.ietf.org/html/rfc6455 enum { - WEBSOCKET_OPCODE_CONTINUATION = 0x0, - WEBSOCKET_OPCODE_TEXT = 0x1, - WEBSOCKET_OPCODE_BINARY = 0x2, - WEBSOCKET_OPCODE_CONNECTION_CLOSE = 0x8, - WEBSOCKET_OPCODE_PING = 0x9, - WEBSOCKET_OPCODE_PONG = 0xa + WEBSOCKET_OPCODE_CONTINUATION = 0x0, + WEBSOCKET_OPCODE_TEXT = 0x1, + WEBSOCKET_OPCODE_BINARY = 0x2, + WEBSOCKET_OPCODE_CONNECTION_CLOSE = 0x8, + WEBSOCKET_OPCODE_PING = 0x9, + WEBSOCKET_OPCODE_PONG = 0xa }; +// Server management functions +struct mg_server *mg_create_server(void *server_param, mg_handler_t handler); +void mg_destroy_server(struct mg_server **); +const char *mg_set_option(struct mg_server *, const char *opt, const char *val); +int mg_poll_server(struct mg_server *, int milliseconds); +const char **mg_get_valid_option_names(void); +const char *mg_get_option(const struct mg_server *server, const char *name); +void mg_set_listening_socket(struct mg_server *, int sock); +int mg_get_listening_socket(struct mg_server *); +void mg_iterate_over_connections(struct mg_server *, mg_handler_t, void *); +void mg_wakeup_server(struct mg_server *); +void mg_wakeup_server_ex(struct mg_server *, mg_handler_t, const char *, ...); +struct mg_connection *mg_connect(struct mg_server *, const char *, int, int); + +// Connection management functions +void mg_send_status(struct mg_connection *, int status_code); +void mg_send_header(struct mg_connection *, const char *name, const char *val); +void mg_send_data(struct mg_connection *, const void *data, int data_len); +void mg_printf_data(struct mg_connection *, const char *format, ...); + +int mg_websocket_write(struct mg_connection *, int opcode, + const char *data, size_t data_len); +int mg_websocket_printf(struct mg_connection* conn, int opcode, + const char *fmt, ...); + +// Deprecated in favor of mg_send_* interface +int mg_write(struct mg_connection *, const void *buf, int len); +int mg_printf(struct mg_connection *conn, const char *fmt, ...); -// Macros for enabling compiler-specific checks for printf-like arguments. -#undef PRINTF_FORMAT_STRING -#if defined(_MSC_VER) && (_MSC_VER >= 1400) -#include <sal.h> -#if defined(_MSC_VER) && (_MSC_VER > 1400) -#define PRINTF_FORMAT_STRING(s) _Printf_format_string_ s -#else -#define PRINTF_FORMAT_STRING(s) __format_string s -#endif -#else -#define PRINTF_FORMAT_STRING(s) s -#endif - -#ifdef __GNUC__ -#define PRINTF_ARGS(x, y) __attribute__((format(printf, x, y))) -#else -#define PRINTF_ARGS(x, y) -#endif - -// Send data to the client using printf() semantics. -// -// Works exactly like mg_write(), but allows to do message formatting. -int mg_printf(struct mg_connection *, - PRINTF_FORMAT_STRING(const char *fmt), ...) PRINTF_ARGS(2, 3); - - -// Send contents of the entire file together with HTTP headers. -void mg_send_file(struct mg_connection *conn, const char *path); - - -// Read data from the remote end, return number of bytes read. -// Return: -// 0 connection has been closed by peer. No more data could be read. -// < 0 read error. No more data could be read from the connection. -// > 0 number of bytes read into the buffer. -int mg_read(struct mg_connection *, void *buf, size_t len); - - -// Get the value of particular HTTP header. -// -// This is a helper function. It traverses request_info->http_headers array, -// and if the header is present in the array, returns its value. If it is -// not present, NULL is returned. const char *mg_get_header(const struct mg_connection *, const char *name); - - -// Get a value of particular form variable. -// -// Parameters: -// data: pointer to form-uri-encoded buffer. This could be either POST data, -// or request_info.query_string. -// data_len: length of the encoded data. -// var_name: variable name to decode from the buffer -// dst: destination buffer for the decoded variable -// dst_len: length of the destination buffer -// -// Return: -// On success, length of the decoded variable. -// On error: -// -1 (variable not found). -// -2 (destination buffer is NULL, zero length or too small to hold the -// decoded variable). -// -// Destination buffer is guaranteed to be '\0' - terminated if it is not -// NULL or zero length. -int mg_get_var(const char *data, size_t data_len, - const char *var_name, char *dst, size_t dst_len); - -// Fetch value of certain cookie variable into the destination buffer. -// -// Destination buffer is guaranteed to be '\0' - terminated. In case of -// failure, dst[0] == '\0'. Note that RFC allows many occurrences of the same -// parameter. This function returns only first occurrence. -// -// Return: -// On success, value length. -// On error: -// -1 (either "Cookie:" header is not present at all or the requested -// parameter is not found). -// -2 (destination buffer is NULL, zero length or too small to hold the -// value). -int mg_get_cookie(const char *cookie, const char *var_name, - char *buf, size_t buf_len); - - -// Download data from the remote web server. -// host: host name to connect to, e.g. "foo.com", or "10.12.40.1". -// port: port number, e.g. 80. -// use_ssl: wether to use SSL connection. -// error_buffer, error_buffer_size: error message placeholder. -// request_fmt,...: HTTP request. -// Return: -// On success, valid pointer to the new connection, suitable for mg_read(). -// On error, NULL. error_buffer contains error message. -// Example: -// char ebuf[100]; -// struct mg_connection *conn; -// conn = mg_download("google.com", 80, 0, ebuf, sizeof(ebuf), -// "%s", "GET / HTTP/1.0\r\nHost: google.com\r\n\r\n"); -struct mg_connection *mg_download(const char *host, int port, int use_ssl, - char *error_buffer, size_t error_buffer_size, - PRINTF_FORMAT_STRING(const char *request_fmt), - ...) PRINTF_ARGS(6, 7); - - -// Close the connection opened by mg_download(). -void mg_close_connection(struct mg_connection *conn); - - -// File upload functionality. Each uploaded file gets saved into a temporary -// file and MG_UPLOAD event is sent. -// Return number of uploaded files. -int mg_upload(struct mg_connection *conn, const char *destination_dir); - - -// Convenience function -- create detached thread. -// Return: 0 on success, non-0 on error. -typedef void * (*mg_thread_func_t)(void *); -int mg_start_thread(mg_thread_func_t f, void *p); - - -// Return builtin mime type for the given file name. -// For unrecognized extensions, "text/plain" is returned. -const char *mg_get_builtin_mime_type(const char *file_name); - - -// Return Mongoose version. -const char *mg_version(void); - -// URL-decode input buffer into destination buffer. -// 0-terminate the destination buffer. -// form-url-encoded data differs from URI encoding in a way that it -// uses '+' as character for space, see RFC 1866 section 8.2.1 -// http://ftp.ics.uci.edu/pub/ietf/html/rfc1866.txt -// Return: length of the decoded data, or -1 if dst buffer is too small. -int mg_url_decode(const char *src, int src_len, char *dst, - int dst_len, int is_form_url_encoded); - -// MD5 hash given strings. -// Buffer 'buf' must be 33 bytes long. Varargs is a NULL terminated list of -// ASCIIz strings. When function returns, buf will contain human-readable -// MD5 hash. Example: -// char buf[33]; -// mg_md5(buf, "aa", "bb", NULL); +const char *mg_get_mime_type(const char *name, const char *default_mime_type); +int mg_get_var(const struct mg_connection *conn, const char *var_name, + char *buf, size_t buf_len); +int mg_parse_header(const char *hdr, const char *var_name, char *buf, size_t); +int mg_parse_multipart(const char *buf, int buf_len, + char *var_name, int var_name_len, + char *file_name, int file_name_len, + const char **data, int *data_len); + +// Utility functions +void *mg_start_thread(void *(*func)(void *), void *param); char *mg_md5(char buf[33], ...); +int mg_authorize_digest(struct mg_connection *c, FILE *fp); +int mg_url_encode(const char *src, size_t s_len, char *dst, size_t dst_len); +int mg_url_decode(const char *src, int src_len, char *dst, int dst_len, int); + +// Templates support +struct mg_expansion { + const char *keyword; + void (*handler)(struct mg_connection *); +}; +void mg_template(struct mg_connection *, const char *text, + struct mg_expansion *expansions); #ifdef __cplusplus |