diff options
author | 2015-01-10 13:30:30 +0100 | |
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committer | 2015-01-10 13:30:30 +0100 | |
commit | 8556d0cdf7058be2c519bd4d8e7006ea9e913527 (patch) | |
tree | 09594058dc17564b4ff3c106581d0856cf69c2d5 /3rdparty/mongoose/mongoose.c | |
parent | 61f7cd05dfed932dd1be927608a4989c187cc737 (diff) |
Added integral source of mongoose (nw)
Diffstat (limited to '3rdparty/mongoose/mongoose.c')
-rw-r--r-- | 3rdparty/mongoose/mongoose.c | 5287 |
1 files changed, 5287 insertions, 0 deletions
diff --git a/3rdparty/mongoose/mongoose.c b/3rdparty/mongoose/mongoose.c new file mode 100644 index 00000000000..0cacdfed470 --- /dev/null +++ b/3rdparty/mongoose/mongoose.c @@ -0,0 +1,5287 @@ +// Copyright (c) 2004-2013 Sergey Lyubka <valenok@gmail.com> +// Copyright (c) 2013-2014 Cesanta Software Limited +// All rights reserved +// +// 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/>. +// +// 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. +// +// Alternatively, you can license this library under a commercial +// license, as set out in <http://cesanta.com/>. + +#ifdef NOEMBED_NET_SKELETON +#include "net_skeleton.h" +#else +// 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/>. +// +// $Date: 2014-09-28 05:04:41 UTC $ + +#ifndef NS_SKELETON_HEADER_INCLUDED +#define NS_SKELETON_HEADER_INCLUDED + +#define NS_SKELETON_VERSION "2.1.0" + +#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 +#ifndef _LARGEFILE_SOURCE +#define _LARGEFILE_SOURCE // Enable fseeko() and ftello() functions +#endif +#define _FILE_OFFSET_BITS 64 // Enable 64-bit file offsets + +#ifdef _MSC_VER +#pragma warning (disable : 4127) // FD_SET() emits warning, disable it +#pragma warning (disable : 4204) // missing c99 support +#endif + +#include <sys/types.h> +#include <sys/stat.h> +#include <assert.h> +#include <ctype.h> +#include <errno.h> +#include <fcntl.h> +#include <stdarg.h> +#include <stddef.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <time.h> +#include <signal.h> + +#ifdef _WIN32 +#ifdef _MSC_VER +#pragma comment(lib, "ws2_32.lib") // Linking with winsock library +#endif +#include <windows.h> +#include <process.h> +#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__) +#endif +#ifndef va_copy +#define va_copy(x,y) x = y +#endif // MINGW #defines va_copy +#define snprintf _snprintf +#define vsnprintf _vsnprintf +#define sleep(x) Sleep((x) * 1000) +#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; +typedef SOCKET sock_t; +typedef struct _stati64 ns_stat_t; +#ifndef S_ISDIR +#define S_ISDIR(x) ((x) & _S_IFDIR) +#endif +#else +#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; +typedef struct stat ns_stat_t; +#endif + +#ifdef NS_ENABLE_DEBUG +#define DBG(x) do { printf("%-20s ", __func__); printf x; putchar('\n'); \ + fflush(stdout); } while(0) +#else +#define DBG(x) +#endif + +#ifndef ARRAY_SIZE +#define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0])) +#endif + +#ifdef NS_ENABLE_SSL +#ifdef __APPLE__ +#pragma GCC diagnostic ignored "-Wdeprecated-declarations" +#endif +#include <openssl/ssl.h> +#else +typedef void *SSL; +typedef void *SSL_CTX; +#endif + +#ifdef __cplusplus +extern "C" { +#endif // __cplusplus + +union socket_address { + struct sockaddr sa; + struct sockaddr_in sin; +#ifdef NS_ENABLE_IPV6 + struct sockaddr_in6 sin6; +#else + struct sockaddr sin6; +#endif +}; + +// Describes chunk of memory +struct ns_str { + const char *p; + size_t len; +}; + +// IO buffers interface +struct iobuf { + char *buf; + size_t len; + size_t size; +}; + +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); +void iobuf_resize(struct iobuf *, size_t new_size); + +// 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 *, int event_num, void *evp); + +// Events. Meaning of event parameter (evp) is given in the comment. +#define NS_POLL 0 // Sent to each connection on each call to ns_mgr_poll() +#define NS_ACCEPT 1 // New connection accept()-ed. union socket_address *addr +#define NS_CONNECT 2 // connect() succeeded or failed. int *success_status +#define NS_RECV 3 // Data has benn received. int *num_bytes +#define NS_SEND 4 // Data has been written to a socket. int *num_bytes +#define NS_CLOSE 5 // Connection is closed. NULL + + +struct ns_mgr { + struct ns_connection *active_connections; + const char *hexdump_file; // Debug hexdump file path + sock_t ctl[2]; // Socketpair for mg_wakeup() + void *user_data; // User data +}; + + +struct ns_connection { + struct ns_connection *next, *prev; // ns_mgr::active_connections linkage + struct ns_connection *listener; // Set only for accept()-ed connections + struct ns_mgr *mgr; + + sock_t sock; // Socket + union socket_address sa; // Peer address + struct iobuf recv_iobuf; // Received data + struct iobuf send_iobuf; // Data scheduled for sending + SSL *ssl; + SSL_CTX *ssl_ctx; + void *user_data; // User-specific data + void *proto_data; // Application protocol-specific data + time_t last_io_time; // Timestamp of the last socket IO + ns_callback_t callback; // Event handler function + + 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_WANT_READ (1 << 5) +#define NSF_WANT_WRITE (1 << 6) +#define NSF_LISTENING (1 << 7) +#define NSF_UDP (1 << 8) + +#define NSF_USER_1 (1 << 20) +#define NSF_USER_2 (1 << 21) +#define NSF_USER_3 (1 << 22) +#define NSF_USER_4 (1 << 23) +#define NSF_USER_5 (1 << 24) +#define NSF_USER_6 (1 << 25) +}; + +void ns_mgr_init(struct ns_mgr *, void *user_data); +void ns_mgr_free(struct ns_mgr *); +time_t ns_mgr_poll(struct ns_mgr *, int milli); +void ns_broadcast(struct ns_mgr *, ns_callback_t, void *, size_t); + +struct ns_connection *ns_next(struct ns_mgr *, struct ns_connection *); +struct ns_connection *ns_add_sock(struct ns_mgr *, sock_t, + ns_callback_t, void *); +struct ns_connection *ns_bind(struct ns_mgr *, const char *, + ns_callback_t, void *); +struct ns_connection *ns_connect(struct ns_mgr *, const char *, + ns_callback_t, void *); + +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); +int ns_avprintf(char **buf, size_t size, const char *fmt, va_list ap); +int ns_resolve(const char *domain_name, char *ip_addr_buf, size_t buf_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/>. +// +// $Date: 2014-09-28 05:04:41 UTC $ + + +#ifndef NS_MALLOC +#define NS_MALLOC malloc +#endif + +#ifndef NS_REALLOC +#define NS_REALLOC realloc +#endif + +#ifndef NS_FREE +#define NS_FREE free +#endif + +#ifndef NS_CALLOC +#define NS_CALLOC calloc +#endif + +#define NS_CTL_MSG_MESSAGE_SIZE (8 * 1024) +#define NS_READ_BUFFER_SIZE 2048 +#define NS_UDP_RECEIVE_BUFFER_SIZE 2000 +#define NS_VPRINTF_BUFFER_SIZE 500 + +struct ctl_msg { + ns_callback_t callback; + char message[NS_CTL_MSG_MESSAGE_SIZE]; +}; + +void iobuf_resize(struct iobuf *io, size_t new_size) { + char *p; + if ((new_size > io->size || (new_size < io->size && new_size >= io->len)) && + (p = (char *) NS_REALLOC(io->buf, new_size)) != NULL) { + io->size = new_size; + io->buf = p; + } +} + +void iobuf_init(struct iobuf *iobuf, size_t initial_size) { + iobuf->len = iobuf->size = 0; + iobuf->buf = NULL; + iobuf_resize(iobuf, initial_size); +} + +void iobuf_free(struct iobuf *iobuf) { + if (iobuf != NULL) { + if (iobuf->buf != NULL) NS_FREE(iobuf->buf); + iobuf_init(iobuf, 0); + } +} + +size_t iobuf_append(struct iobuf *io, const void *buf, size_t len) { + char *p = NULL; + + assert(io != NULL); + assert(io->len <= io->size); + + 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; + } + + return len; +} + +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; + } +} + +static size_t ns_out(struct ns_connection *nc, const void *buf, size_t len) { + if (nc->flags & NSF_UDP) { + long n = sendto(nc->sock, buf, len, 0, &nc->sa.sa, sizeof(nc->sa.sin)); + DBG(("%p %d send %ld (%d %s)", nc, nc->sock, n, errno, strerror(errno))); + return n < 0 ? 0 : n; + } else { + return iobuf_append(&nc->send_iobuf, buf, len); + } +} + +#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; + + (void) pthread_attr_init(&attr); + (void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); + +#if defined(NS_STACK_SIZE) && NS_STACK_SIZE > 1 + (void) pthread_attr_setstacksize(&attr, NS_STACK_SIZE); +#endif + + pthread_create(&thread_id, &attr, f, p); + pthread_attr_destroy(&attr); + + return (void *) thread_id; +#endif +} +#endif // NS_DISABLE_THREADS + +static void ns_add_conn(struct ns_mgr *mgr, struct ns_connection *c) { + c->next = mgr->active_connections; + mgr->active_connections = c; + c->prev = NULL; + if (c->next != NULL) c->next->prev = c; +} + +static void ns_remove_conn(struct ns_connection *conn) { + if (conn->prev == NULL) conn->mgr->active_connections = conn->next; + if (conn->prev) conn->prev->next = conn->next; + if (conn->next) conn->next->prev = conn->prev; +} + +// 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. +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) NS_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 *nc, const char *fmt, va_list ap) { + char mem[NS_VPRINTF_BUFFER_SIZE], *buf = mem; + int len; + + if ((len = ns_avprintf(&buf, sizeof(mem), fmt, ap)) > 0) { + ns_out(nc, buf, len); + } + if (buf != mem && buf != NULL) { + NS_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 hexdump(struct ns_connection *nc, const char *path, + int num_bytes, int ev) { + const struct iobuf *io = ev == NS_SEND ? &nc->send_iobuf : &nc->recv_iobuf; + FILE *fp; + char *buf, src[60], dst[60]; + int buf_size = num_bytes * 5 + 100; + + if ((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->user_data, src, + ev == NS_RECV ? "<-" : ev == NS_SEND ? "->" : + ev == NS_ACCEPT ? "<A" : ev == NS_CONNECT ? "C>" : "XX", + dst, num_bytes); + if (num_bytes > 0 && (buf = (char *) NS_MALLOC(buf_size)) != NULL) { + ns_hexdump(io->buf + (ev == NS_SEND ? 0 : io->len) - + (ev == NS_SEND ? 0 : num_bytes), num_bytes, buf, buf_size); + fprintf(fp, "%s", buf); + NS_FREE(buf); + } + fclose(fp); + } +} + +static void ns_call(struct ns_connection *nc, int ev, void *p) { + if (nc->mgr->hexdump_file != NULL && ev != NS_POLL) { + int len = (ev == NS_RECV || ev == NS_SEND) ? * (int *) p : 0; + hexdump(nc, nc->mgr->hexdump_file, len, ev); + } + + nc->callback(nc, ev, p); +} + +static void ns_destroy_conn(struct ns_connection *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); + } + if (conn->ssl_ctx != NULL) { + SSL_CTX_free(conn->ssl_ctx); + } +#endif + NS_FREE(conn); +} + +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); + ns_destroy_conn(conn); +} + +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 void ns_set_non_blocking_mode(sock_t sock) { +#ifdef _WIN32 + unsigned long on = 1; + ioctlsocket(sock, FIONBIO, &on); +#else + int flags = fcntl(sock, F_GETFL, 0); + fcntl(sock, F_SETFL, flags | O_NONBLOCK); +#endif +} + +#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 + +// TODO(lsm): use non-blocking resolver +static int ns_resolve2(const char *host, struct in_addr *ina) { + struct hostent *he; + if ((he = gethostbyname(host)) == NULL) { + DBG(("gethostbyname(%s) failed: %s", host, strerror(errno))); + } else { + memcpy(ina, he->h_addr_list[0], sizeof(*ina)); + return 1; + } + return 0; +} + +// Resolve FDQN "host", store IP address in the "ip". +// Return > 0 (IP address length) on success. +int ns_resolve(const char *host, char *buf, size_t n) { + struct in_addr ad; + return ns_resolve2(host, &ad) ? snprintf(buf, n, "%s", inet_ntoa(ad)) : 0; +} + +// Address format: [PROTO://][IP_ADDRESS:]PORT[:CERT][:CA_CERT] +static int ns_parse_address(const char *str, union socket_address *sa, + int *proto, int *use_ssl, char *cert, char *ca) { + unsigned int a, b, c, d, port; + int n = 0, len = 0; + char host[200]; +#ifdef NS_ENABLE_IPV6 + char buf[100]; +#endif + + // 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; + + *proto = SOCK_STREAM; + *use_ssl = 0; + cert[0] = ca[0] = '\0'; + + if (memcmp(str, "ssl://", 6) == 0) { + str += 6; + *use_ssl = 1; + } else if (memcmp(str, "udp://", 6) == 0) { + str += 6; + *proto = SOCK_DGRAM; + } else if (memcmp(str, "tcp://", 6) == 0) { + str += 6; + } + + 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, "[%99[^]]]:%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, "%199[^ :]:%u%n", host, &port, &len) == 2) { + sa->sin.sin_port = htons((uint16_t) port); + ns_resolve2(host, &sa->sin.sin_addr); + } 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); + } + + if (*use_ssl && (sscanf(str + len, ":%99[^:]:%99[^:]%n", cert, ca, &n) == 2 || + sscanf(str + len, ":%99[^:]%n", cert, &n) == 1)) { + len += n; + } + + return port < 0xffff && str[len] == '\0' ? len : 0; +} + +// 'sa' must be an initialized address to bind to +static sock_t ns_open_listening_socket(union socket_address *sa, int proto) { + socklen_t sa_len = (sa->sa.sa_family == AF_INET) ? + sizeof(sa->sin) : sizeof(sa->sin6); + sock_t sock = INVALID_SOCKET; +#ifndef _WIN32 + int on = 1; +#endif + + if ((sock = socket(sa->sa.sa_family, proto, 0)) != INVALID_SOCKET && +#ifndef _WIN32 + // SO_RESUSEADDR is not enabled on Windows because the semantics of + // SO_REUSEADDR on UNIX and Windows is different. On Windows, + // SO_REUSEADDR allows to bind a socket to a port without error even if + // the port is already open by another program. This is not the behavior + // SO_REUSEADDR was designed for, and leads to hard-to-track failure + // scenarios. Therefore, SO_REUSEADDR was disabled on Windows. + !setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void *) &on, sizeof(on)) && +#endif + !bind(sock, &sa->sa, sa_len) && + (proto == SOCK_DGRAM || listen(sock, SOMAXCONN) == 0)) { + ns_set_non_blocking_mode(sock); + // In case port was set to 0, get the real port number + (void) getsockname(sock, &sa->sa, &sa_len); + } else if (sock != INVALID_SOCKET) { + closesocket(sock); + sock = INVALID_SOCKET; + } + + return sock; +} + +#ifdef NS_ENABLE_SSL +// Certificate generation script is at +// https://github.com/cesanta/net_skeleton/blob/master/scripts/gen_certs.sh + +static int ns_use_ca_cert(SSL_CTX *ctx, const char *cert) { + if (ctx == NULL) { + return -1; + } else if (cert == NULL || cert[0] == '\0') { + return 0; + } + SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT, 0); + return SSL_CTX_load_verify_locations(ctx, cert, NULL) == 1 ? 0 : -2; +} + +static int ns_use_cert(SSL_CTX *ctx, const char *pem_file) { + if (ctx == NULL) { + return -1; + } else if (pem_file == NULL || pem_file[0] == '\0') { + return 0; + } else if (SSL_CTX_use_certificate_file(ctx, pem_file, 1) == 0 || + SSL_CTX_use_PrivateKey_file(ctx, pem_file, 1) == 0) { + return -2; + } else { + SSL_CTX_set_mode(ctx, SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER); + SSL_CTX_use_certificate_chain_file(ctx, pem_file); + return 0; + } +} +#endif // NS_ENABLE_SSL + +struct ns_connection *ns_bind(struct ns_mgr *srv, const char *str, + ns_callback_t callback, void *user_data) { + union socket_address sa; + struct ns_connection *nc = NULL; + int use_ssl, proto; + char cert[100], ca_cert[100]; + sock_t sock; + + ns_parse_address(str, &sa, &proto, &use_ssl, cert, ca_cert); + if (use_ssl && cert[0] == '\0') return NULL; + + if ((sock = ns_open_listening_socket(&sa, proto)) == INVALID_SOCKET) { + } else if ((nc = ns_add_sock(srv, sock, callback, NULL)) == NULL) { + closesocket(sock); + } else { + nc->sa = sa; + nc->flags |= NSF_LISTENING; + nc->user_data = user_data; + nc->callback = callback; + + if (proto == SOCK_DGRAM) { + nc->flags |= NSF_UDP; + } + +#ifdef NS_ENABLE_SSL + if (use_ssl) { + nc->ssl_ctx = SSL_CTX_new(SSLv23_server_method()); + if (ns_use_cert(nc->ssl_ctx, cert) != 0 || + ns_use_ca_cert(nc->ssl_ctx, ca_cert) != 0) { + ns_close_conn(nc); + nc = NULL; + } + } +#endif + + DBG(("%p sock %d/%d ssl %p %p", nc, sock, proto, nc->ssl_ctx, nc->ssl)); + } + + return nc; +} + +static struct ns_connection *accept_conn(struct ns_connection *ls) { + 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(ls->sock, &sa.sa, &len)) == INVALID_SOCKET) { + } else if ((c = ns_add_sock(ls->mgr, sock, ls->callback, + ls->user_data)) == NULL) { + closesocket(sock); +#ifdef NS_ENABLE_SSL + } else if (ls->ssl_ctx != NULL && + ((c->ssl = SSL_new(ls->ssl_ctx)) == NULL || + SSL_set_fd(c->ssl, sock) != 1)) { + DBG(("SSL error")); + ns_close_conn(c); + c = NULL; +#endif + } else { + c->listener = ls; + c->proto_data = ls->proto_data; + ns_call(c, NS_ACCEPT, &sa); + DBG(("%p %d %p %p", c, c->sock, c->ssl_ctx, c->ssl)); + } + + return c; +} + +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,(socklen_t)len); +#endif + } + if (flags & 2) { + snprintf(buf + strlen(buf), len - (strlen(buf) + 1), "%s%d", + flags & 1 ? ":" : "", (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; +} + +#ifdef NS_ENABLE_SSL +static int ns_ssl_err(struct ns_connection *conn, int res) { + int ssl_err = SSL_get_error(conn->ssl, res); + if (ssl_err == SSL_ERROR_WANT_READ) conn->flags |= NSF_WANT_READ; + if (ssl_err == SSL_ERROR_WANT_WRITE) conn->flags |= NSF_WANT_WRITE; + return ssl_err; +} +#endif + +static void ns_read_from_socket(struct ns_connection *conn) { + char buf[NS_READ_BUFFER_SIZE]; + 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 = ns_ssl_err(conn, res); + 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) { + // SSL library may have more bytes ready to read then we ask to read. + // Therefore, read in a loop until we read everything. Without the loop, + // we skip to the next select() cycle which can just timeout. + while ((n = SSL_read(conn->ssl, buf, sizeof(buf))) > 0) { + DBG(("%p %d <- %d bytes (SSL)", conn, conn->flags, n)); + iobuf_append(&conn->recv_iobuf, buf, n); + ns_call(conn, NS_RECV, &n); + } + ns_ssl_err(conn, n); + } else { + int res = SSL_accept(conn->ssl); + int ssl_err = ns_ssl_err(conn, res); + 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 + { + while ((n = (int) recv(conn->sock, buf, sizeof(buf), 0)) > 0) { + DBG(("%p %d <- %d bytes (PLAIN)", conn, conn->flags, n)); + iobuf_append(&conn->recv_iobuf, buf, n); + ns_call(conn, NS_RECV, &n); + } + } + + if (ns_is_error(n)) { + conn->flags |= NSF_CLOSE_IMMEDIATELY; + } +} + +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 = ns_ssl_err(conn, n); + if (ssl_err == SSL_ERROR_WANT_READ || ssl_err == SSL_ERROR_WANT_WRITE) { + return; // Call us again + } else { + conn->flags |= NSF_CLOSE_IMMEDIATELY; + } + } + } else +#endif + { n = (int) 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); + } +} + +int ns_send(struct ns_connection *conn, const void *buf, int len) { + return (int) ns_out(conn, buf, len); +} + +static void ns_handle_udp(struct ns_connection *ls) { + struct ns_connection nc; + char buf[NS_UDP_RECEIVE_BUFFER_SIZE]; + int n; + socklen_t s_len = sizeof(nc.sa); + + memset(&nc, 0, sizeof(nc)); + n = recvfrom(ls->sock, buf, sizeof(buf), 0, &nc.sa.sa, &s_len); + if (n <= 0) { + DBG(("%p recvfrom: %s", ls, strerror(errno))); + } else { + nc.mgr = ls->mgr; + nc.recv_iobuf.buf = buf; + nc.recv_iobuf.len = nc.recv_iobuf.size = n; + nc.sock = ls->sock; + nc.callback = ls->callback; + nc.user_data = ls->user_data; + nc.proto_data = ls->proto_data; + nc.mgr = ls->mgr; + nc.listener = ls; + nc.flags = NSF_UDP; + DBG(("%p %d bytes received", ls, n)); + ns_call(&nc, NS_RECV, &n); + } +} + +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; + } + } +} + +time_t ns_mgr_poll(struct ns_mgr *mgr, int milli) { + struct ns_connection *conn, *tmp_conn; + struct timeval tv; + fd_set read_set, write_set; + sock_t max_fd = INVALID_SOCKET; + time_t current_time = time(NULL); + + FD_ZERO(&read_set); + FD_ZERO(&write_set); + ns_add_to_set(mgr->ctl[1], &read_set, &max_fd); + + for (conn = mgr->active_connections; conn != NULL; conn = tmp_conn) { + tmp_conn = conn->next; + if (!(conn->flags & (NSF_LISTENING | NSF_CONNECTING))) { + ns_call(conn, NS_POLL, ¤t_time); + } + if (conn->flags & NSF_CLOSE_IMMEDIATELY) { + ns_close_conn(conn); + } else { + 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); + } + } + } + + tv.tv_sec = milli / 1000; + tv.tv_usec = (milli % 1000) * 1000; + + if (select((int) max_fd + 1, &read_set, &write_set, NULL, &tv) > 0) { + // select() might have been waiting for a long time, reset current_time + // now to prevent last_io_time being set to the past. + current_time = time(NULL); + + // Read wakeup messages + if (mgr->ctl[1] != INVALID_SOCKET && + FD_ISSET(mgr->ctl[1], &read_set)) { + struct ctl_msg ctl_msg; + int len = (int) recv(mgr->ctl[1], (char *) &ctl_msg, sizeof(ctl_msg), 0); + send(mgr->ctl[1], ctl_msg.message, 1, 0); + if (len >= (int) sizeof(ctl_msg.callback) && ctl_msg.callback != NULL) { + struct ns_connection *c; + for (c = ns_next(mgr, NULL); c != NULL; c = ns_next(mgr, c)) { + ctl_msg.callback(c, NS_POLL, ctl_msg.message); + } + } + } + + for (conn = mgr->active_connections; conn != NULL; conn = tmp_conn) { + tmp_conn = conn->next; + if (FD_ISSET(conn->sock, &read_set)) { + if (conn->flags & NSF_LISTENING) { + if (conn->flags & NSF_UDP) { + ns_handle_udp(conn); + } else { + // 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. + accept_conn(conn); + } + } else { + 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 = mgr->active_connections; conn != NULL; conn = tmp_conn) { + tmp_conn = conn->next; + if ((conn->flags & NSF_CLOSE_IMMEDIATELY) || + (conn->send_iobuf.len == 0 && + (conn->flags & NSF_FINISHED_SENDING_DATA))) { + ns_close_conn(conn); + } + } + + return current_time; +} + +struct ns_connection *ns_connect(struct ns_mgr *mgr, const char *address, + ns_callback_t callback, void *user_data) { + sock_t sock = INVALID_SOCKET; + struct ns_connection *nc = NULL; + union socket_address sa; + char cert[100], ca_cert[100]; + int rc, use_ssl, proto; + + ns_parse_address(address, &sa, &proto, &use_ssl, cert, ca_cert); + if ((sock = socket(AF_INET, proto, 0)) == INVALID_SOCKET) { + return NULL; + } + ns_set_non_blocking_mode(sock); + rc = (proto == SOCK_DGRAM) ? 0 : connect(sock, &sa.sa, sizeof(sa.sin)); + + if (rc != 0 && ns_is_error(rc)) { + closesocket(sock); + return NULL; + } else if ((nc = ns_add_sock(mgr, sock, callback, user_data)) == NULL) { + closesocket(sock); + return NULL; + } + + nc->sa = sa; // Important, cause UDP conns will use sendto() + nc->flags = (proto == SOCK_DGRAM) ? NSF_UDP : NSF_CONNECTING; + +#ifdef NS_ENABLE_SSL + if (use_ssl) { + if ((nc->ssl_ctx = SSL_CTX_new(SSLv23_client_method())) == NULL || + ns_use_cert(nc->ssl_ctx, cert) != 0 || + ns_use_ca_cert(nc->ssl_ctx, ca_cert) != 0 || + (nc->ssl = SSL_new(nc->ssl_ctx)) == NULL) { + ns_close_conn(nc); + return NULL; + } else { + SSL_set_fd(nc->ssl, sock); + } + } +#endif + + return nc; +} + +struct ns_connection *ns_add_sock(struct ns_mgr *s, sock_t sock, + ns_callback_t callback, void *user_data) { + 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); + ns_set_close_on_exec(sock); + conn->sock = sock; + conn->user_data = user_data; + conn->callback = callback; + conn->mgr = s; + conn->last_io_time = time(NULL); + ns_add_conn(s, conn); + DBG(("%p %d", conn, sock)); + } + return conn; +} + +struct ns_connection *ns_next(struct ns_mgr *s, struct ns_connection *conn) { + return conn == NULL ? s->active_connections : conn->next; +} + +void ns_broadcast(struct ns_mgr *mgr, ns_callback_t cb,void *data, size_t len) { + struct ctl_msg ctl_msg; + if (mgr->ctl[0] != INVALID_SOCKET && data != NULL && + len < sizeof(ctl_msg.message)) { + ctl_msg.callback = cb; + memcpy(ctl_msg.message, data, len); + send(mgr->ctl[0], (char *) &ctl_msg, + offsetof(struct ctl_msg, message) + len, 0); + recv(mgr->ctl[0], (char *) &len, 1, 0); + } +} + +void ns_mgr_init(struct ns_mgr *s, void *user_data) { + memset(s, 0, sizeof(*s)); + s->ctl[0] = s->ctl[1] = INVALID_SOCKET; + s->user_data = user_data; + +#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 + +#ifndef NS_DISABLE_SOCKETPAIR + do { + ns_socketpair2(s->ctl, SOCK_DGRAM); + } while (s->ctl[0] == INVALID_SOCKET); +#endif + +#ifdef NS_ENABLE_SSL + {static int init_done; if (!init_done) { SSL_library_init(); init_done++; }} +#endif +} + +void ns_mgr_free(struct ns_mgr *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_mgr_poll(s, 0); + + if (s->ctl[0] != INVALID_SOCKET) closesocket(s->ctl[0]); + if (s->ctl[1] != INVALID_SOCKET) closesocket(s->ctl[1]); + s->ctl[0] = s->ctl[1] = INVALID_SOCKET; + + for (conn = s->active_connections; conn != NULL; conn = tmp_conn) { + tmp_conn = conn->next; + ns_close_conn(conn); + } +} +// net_skeleton end +#endif // NOEMBED_NET_SKELETON + +#include <ctype.h> + +#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, z) mg_open((x), (y), (z)) +#define close(x) _close(x) +#define fileno(x) _fileno(x) +#define lseek(x, y, z) _lseeki64((x), (y), (z)) +#define read(x, y, z) _read((x), (y), (z)) +#define write(x, y, z) _write((x), (y), (z)) +#define popen(x, y) _popen((x), (y)) +#define pclose(x) _pclose(x) +#define mkdir(x, y) _mkdir(x) +#define rmdir(x) _rmdir(x) +#define strdup(x) _strdup(x) +#ifndef __func__ +#define STRX(x) #x +#define STR(x) STRX(x) +#define __func__ __FILE__ ":" STR(__LINE__) +#endif +/* MINGW has adopted the MSVC formatting for 64-bit ints as of gcc 4.4 till 4.8*/ +#if (defined(__MINGW32__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4 && __GNUC_MINOR__ < 8))) || defined(_MSC_VER) +#define INT64_FMT "I64d" +#else +#define INT64_FMT "lld" +#endif +#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 + +#if !defined(MONGOOSE_NO_FILESYSTEM) &&\ + (!defined(MONGOOSE_NO_DAV) || !defined(MONGOOSE_NO_DIRECTORY_LISTING)) +#include <dirent.h> +#endif +#if !defined(MONGOOSE_NO_FILESYSTEM) && !defined(MONGOOSE_NO_DL) +#include <dlfcn.h> +#endif +#include <inttypes.h> +#include <pwd.h> +#if !defined(O_BINARY) +#define O_BINARY 0 +#endif +#define INT64_FMT PRId64 +typedef struct stat file_stat_t; +typedef pid_t process_id_t; +#endif //////// End of platform-specific defines and includes + +#include "mongoose.h" + +#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" + +#ifndef MONGOOSE_USE_WEBSOCKET_PING_INTERVAL +#define MONGOOSE_USE_WEBSOCKET_PING_INTERVAL 5 +#endif + +// Extra HTTP headers to send in every static file reply +#if !defined(MONGOOSE_USE_EXTRA_HTTP_HEADERS) +#define MONGOOSE_USE_EXTRA_HTTP_HEADERS "" +#endif + +#ifndef MONGOOSE_POST_SIZE_LIMIT +#define MONGOOSE_POST_SIZE_LIMIT 0 +#endif + +#ifndef MONGOOSE_IDLE_TIMEOUT_SECONDS +#define MONGOOSE_IDLE_TIMEOUT_SECONDS 300 +#endif + +#if defined(NS_DISABLE_SOCKETPAIR) && !defined(MONGOOSE_NO_CGI) +#define MONGOOSE_NO_CGI +#endif + +#ifdef MONGOOSE_NO_FILESYSTEM +#define MONGOOSE_NO_AUTH +#if !defined(MONGOOSE_NO_CGI) +#define MONGOOSE_NO_CGI +#endif +#define MONGOOSE_NO_DAV +#define MONGOOSE_NO_DIRECTORY_LISTING +#define MONGOOSE_NO_LOGGING +#define MONGOOSE_NO_SSI +#define MONGOOSE_NO_DL +#endif + +struct vec { + const char *ptr; + int len; +}; + +// 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 + ENABLE_PROXY, + 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 + URL_REWRITES, + NUM_OPTIONS +}; + +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 + "enable_proxy", NULL, + "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", +#endif + "listening_port", NULL, +#ifndef _WIN32 + "run_as_user", NULL, +#endif +#ifndef MONGOOSE_NO_SSI + "ssi_pattern", "**.shtml$|**.shtm$", +#endif + "url_rewrites", NULL, + NULL +}; + +struct mg_server { + struct ns_mgr ns_mgr; + union socket_address lsa; // Listening socket address + mg_handler_t event_handler; + char *config_options[NUM_OPTIONS]; +}; + +// Local endpoint representation +union endpoint { + int fd; // Opened regular local file + struct ns_connection *nc; // CGI or proxy->target connection +}; + +enum endpoint_type { + EP_NONE, EP_FILE, EP_CGI, EP_USER, EP_PUT, EP_CLIENT, EP_PROXY +}; + +#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 +#define MG_PROXY_DONT_PARSE NSF_USER_5 + +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_recv; // Total number of bytes received + 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 void mg_ev_handler(struct ns_connection *nc, int ev, void *p); + +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/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, "application/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 + +#ifndef MONGOOSE_NO_MMAP +#ifdef _WIN32 +static void *mmap(void *addr, int64_t len, int prot, int flags, int fd, + int offset) { + HANDLE fh = (HANDLE) _get_osfhandle(fd); + HANDLE mh = CreateFileMapping(fh, 0, PAGE_READONLY, 0, 0, 0); + void *p = MapViewOfFile(mh, FILE_MAP_READ, 0, 0, (size_t) len); + CloseHandle(mh); + return p; +} +#define munmap(x, y) UnmapViewOfFile(x) +#define MAP_FAILED NULL +#define MAP_PRIVATE 0 +#define PROT_READ 0 +#else +#include <sys/mman.h> +#endif + +void *mg_mmap(FILE *fp, size_t size) { + void *p = mmap(NULL, size, PROT_READ, MAP_PRIVATE, fileno(fp), 0); + return p == MAP_FAILED ? NULL : p; +} + +void mg_munmap(void *p, size_t size) { + munmap(p, size); +} +#endif // MONGOOSE_NO_MMAP + +#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; + + strncpy(buf, path, sizeof(buf)); + buf[sizeof(buf) - 1] = '\0'; + + // 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'; + } +} + +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); +} + +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, int mode) { + wchar_t wpath[MAX_PATH_SIZE]; + to_wchar(path, wpath, ARRAY_SIZE(wpath)); + return _wopen(wpath, flag, mode); +} +#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. +// Value is stored in val vector. If value has form "x=y", then eq_val +// 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; +} + +// 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; +} + +// 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; +} + +// 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; + + begin_word = *buf; + end_word = begin_word + strcspn(begin_word, delimiters); + end_delimiters = end_word + strspn(end_word, delimiters); + + for (p = end_word; p < end_delimiters; p++) { + *p = '\0'; + } + + *buf = end_delimiters; + + return begin_word; +} + +// 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 100: return "Continue"; + case 101: return "Switching Protocols"; + case 102: return "Processing"; + + case 200: return "OK"; + case 201: return "Created"; + case 202: return "Accepted"; + case 203: return "Non-Authoritative Information"; + case 204: return "No Content"; + case 205: return "Reset Content"; + case 206: return "Partial Content"; + case 207: return "Multi-Status"; + case 208: return "Already Reported"; + case 226: return "IM Used"; + + case 300: return "Multiple Choices"; + case 301: return "Moved Permanently"; + case 302: return "Found"; + case 303: return "See Other"; + case 304: return "Not Modified"; + case 305: return "Use Proxy"; + case 306: return "Switch Proxy"; + case 307: return "Temporary Redirect"; + case 308: return "Permanent Redirect"; + + case 400: return "Bad Request"; + case 401: return "Unauthorized"; + case 402: return "Payment Required"; + case 403: return "Forbidden"; + case 404: return "Not Found"; + case 405: return "Method Not Allowed"; + case 406: return "Not Acceptable"; + case 407: return "Proxy Authentication Required"; + case 408: return "Request Timeout"; + case 409: return "Conflict"; + case 410: return "Gone"; + case 411: return "Length Required"; + case 412: return "Precondition Failed"; + case 413: return "Payload Too Large"; + case 414: return "URI Too Long"; + case 415: return "Unsupported Media Type"; + case 416: return "Requested Range Not Satisfiable"; + case 417: return "Expectation Failed"; + case 418: return "I\'m a teapot"; + case 422: return "Unprocessable Entity"; + case 423: return "Locked"; + case 424: return "Failed Dependency"; + case 426: return "Upgrade Required"; + case 428: return "Precondition Required"; + case 429: return "Too Many Requests"; + case 431: return "Request Header Fields Too Large"; + case 451: return "Unavailable For Legal Reasons"; + + case 500: return "Internal Server Error"; + case 501: return "Not Implemented"; + case 502: return "Bad Gateway"; + case 503: return "Service Unavailable"; + case 504: return "Gateway Timeout"; + case 505: return "HTTP Version Not Supported"; + case 506: return "Variant Also Negotiates"; + case 507: return "Insufficient Storage"; + case 508: return "Loop Detected"; + case 510: return "Not Extended"; + case 511: return "Network Authentication Required"; + + 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); +} + +size_t mg_printf(struct mg_connection *conn, const char *fmt, ...) { + struct connection *c = MG_CONN_2_CONN(conn); + va_list ap; + + va_start(ap, fmt); + ns_vprintf(c->ns_conn, fmt, ap); + va_end(ap); + + return c->ns_conn->send_iobuf.len; +} + +static void ns_forward(struct ns_connection *from, struct ns_connection *to) { + DBG(("%p -> %p %lu bytes", from, to, (unsigned long)from->recv_iobuf.len)); + ns_send(to, from->recv_iobuf.buf, from->recv_iobuf.len); + iobuf_remove(&from->recv_iobuf, from->recv_iobuf.len); +} + +#ifndef MONGOOSE_NO_CGI +#ifdef _WIN32 +struct threadparam { + sock_t s; + HANDLE hPipe; +}; + +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); + NS_FREE(tp); + _endthread(); + return NULL; +} + +static void *pull_from_stdout(void *arg) { + struct threadparam *tp = (struct threadparam *)arg; + int k = 0, 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); + NS_FREE(tp); + _endthread(); + return NULL; +} + +static void spawn_stdio_thread(sock_t sock, HANDLE hPipe, + void *(*func)(void *)) { + struct threadparam *tp = (struct threadparam *)NS_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; + PROCESS_INFORMATION pi; + 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; + + memset(&si, 0, sizeof(si)); + memset(&pi, 0, sizeof(pi)); + + 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) - 1; + 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)); + + // Not closing a[0] and b[1] because we've used DUPLICATE_CLOSE_SOURCE + CloseHandle(si.hStdOutput); + CloseHandle(si.hStdInput); + //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, (char *) 0, envp); // Using (char *) 0 to avoid warning + } else { + execle(interp, interp, cmd, (char *) 0, 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 + +// 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_mgr, fds[0], + mg_ev_handler, 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); + } + +#ifndef _WIN32 + closesocket(fds[1]); // On Windows, CGI stdio thread closes that socket +#endif +} + +static void on_cgi_data(struct ns_connection *nc) { + struct connection *conn = (struct connection *) nc->user_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 *) NS_MALLOC(strlen(str) + 1); + if (copy != NULL) { + strcpy(copy, str); + } + return copy; +} + +static int isbyte(int n) { + return n >= 0 && n <= 255; +} + +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; +} + +// 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 ? '+' : '-'; + + 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 (net == (remote_ip & mask)) { + allowed = flag; + } + } + + return allowed == '+'; +} + +// 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') + + 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; +} + +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"); +} + +// 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; + } else { + ri->status_code = atoi(ri->uri); + } + 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; +} + +static int lowercase(const char *s) { + return tolower(* (const unsigned char *) s); +} + +static int mg_strcasecmp(const char *s1, const char *s2) { + int diff; + + do { + diff = lowercase(s1++) - lowercase(s2++); + } while (diff == 0 && s1[-1] != '\0'); + + return diff; +} + +static int mg_strncasecmp(const char *s1, const char *s2, size_t len) { + int diff = 0; + + if (len > 0) + do { + diff = lowercase(s1++) - lowercase(s2++); + } while (diff == 0 && s1[-1] != '\0' && --len > 0); + + return diff; +} + +// 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 0; +} +#endif // MONGOOSE_NO_FILESYSTEM + +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"))); +} + +size_t mg_write(struct mg_connection *c, const void *buf, int len) { + struct connection *conn = MG_CONN_2_CONN(c); + ns_send(conn->ns_conn, buf, len); + return conn->ns_conn->send_iobuf.len; +} + +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)); + } +} + +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); +} + +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; + } +} + +size_t mg_send_data(struct mg_connection *c, const void *data, int data_len) { + struct connection *conn = MG_CONN_2_CONN(c); + terminate_headers(c); + write_chunk(MG_CONN_2_CONN(c), (const char *) data, data_len); + return conn->ns_conn->send_iobuf.len; +} + +size_t 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; + + terminate_headers(c); + + va_start(ap, fmt); + len = ns_avprintf(&buf, sizeof(mem), fmt, ap); + va_end(ap); + + if (len >= 0) { + write_chunk((struct connection *) conn, buf, len); + } + if (buf != mem && buf != NULL) { + NS_FREE(buf); + } + return conn->ns_conn->send_iobuf.len; +} + +#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 + +#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 + +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]; +} + +/* Avoid redefine warning (ARM /usr/include/sys/ucontext.h define R0~R4) */ +#undef blk +#undef R0 +#undef R1 +#undef R2 +#undef R3 +#undef R4 + +#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; + // 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; +} + +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; +} + +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); +} + +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 + +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; +} + +size_t 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; + + if (data_len + 10 > sizeof(mem) && + (copy = (unsigned char *) NS_MALLOC(data_len + 10)) == NULL) { + return 0; + } + + 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; + const uint32_t hi = htonl((uint32_t) ((uint64_t) data_len >> 32)); + const uint32_t lo = htonl(data_len & 0xffffffff); + memcpy(copy+2,&hi,sizeof(hi)); + memcpy(copy+6,&lo,sizeof(lo)); + memcpy(copy + 10, data, data_len); + copy_len = 10 + data_len; + } + + if (copy_len > 0) { + mg_write(conn, copy, copy_len); + } + if (copy != mem) { + NS_FREE(copy); + } + + // If we send closing frame, schedule a connection to be closed after + // data is drained to the client. + if (opcode == WEBSOCKET_OPCODE_CONNECTION_CLOSE) { + MG_CONN_2_CONN(conn)->ns_conn->flags |= NSF_FINISHED_SENDING_DATA; + } + + return MG_CONN_2_CONN(conn)->ns_conn->send_iobuf.len; +} + +size_t 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) { + NS_FREE(buf); + } + + return MG_CONN_2_CONN(conn)->ns_conn->send_iobuf.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); + } + call_user(MG_CONN_2_CONN(conn), MG_WS_CONNECT); + } +} + +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 + +static void write_terminating_chunk(struct connection *conn) { + mg_write(&conn->mg_conn, "0\r\n\r\n", 5); +} + +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; +} + +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) { + static const char *month_names[] = { + "Jan", "Feb", "Mar", "Apr", "May", "Jun", + "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" + }; + int i; + + for (i = 0; i < (int) ARRAY_SIZE(month_names); i++) + if (!strcmp(s, month_names[i])) + return i; + + return -1; +} + +static int num_leap_years(int year) { + 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; +} + +// 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 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, const char *extra_headers) { + char date[64], lm[64], etag[64], range[64], headers[1000]; + 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%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, extra_headers == NULL ? "" : extra_headers, + 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; + } +} + +void mg_send_file_data(struct mg_connection *c, int fd) { + struct connection *conn = MG_CONN_2_CONN(c); + conn->endpoint_type = EP_FILE; + conn->endpoint.fd = fd; + ns_set_close_on_exec(conn->endpoint.fd); +} +#endif // MONGOOSE_NO_FILESYSTEM + +static void call_request_handler_if_data_is_buffered(struct connection *conn) { +#ifndef MONGOOSE_NO_WEBSOCKET + if (conn->mg_conn.is_websocket) { + do { } while (deliver_websocket_frame(conn)); + } else +#endif + if (conn->num_bytes_recv >= (conn->cl + conn->request_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]; +}; + +typedef struct DIR { + HANDLE handle; + WIN32_FIND_DATAW info; + struct dirent result; +} DIR; + +// 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 *) NS_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 { + NS_FREE(dir); + dir = NULL; + } + } + + return dir; +} + +static int closedir(DIR *dir) { + int result = 0; + + if (dir != NULL) { + if (dir->handle != INVALID_HANDLE_VALUE) + result = FindClose(dir->handle) ? 0 : -1; + + NS_FREE(dir); + } else { + result = -1; + SetLastError(ERROR_BAD_ARGUMENTS); + } + + return result; +} + +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 *) + NS_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 + 2 < 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]); + NS_FREE(arr[i].file_name); + } + NS_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"); +#ifdef MONGOOSE_NO_DIRECTORY_LISTING + const char *list_dir = "no"; +#else + const char *list_dir = conn->server->config_options[ENABLE_DIRECTORY_LISTING]; +#endif + + 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_FREE(de->file_name); + } + NS_FREE(arr); + } + 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); + } +} + +// 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); + } else if ((conn->endpoint.fd = + open(path, O_RDWR | O_CREAT | O_TRUNC | O_BINARY, 0644)) < 0) { + send_http_error(conn, 500, "open(%s): %s", path, strerror(errno)); + } else { + DBG(("PUT [%s] %lu", path, (unsigned long) 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 : (int64_t) 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); +} + +// 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, + int is_directory) { + char name[MAX_PATH_SIZE]; + const char *p, *gpass = conn->server->config_options[GLOBAL_AUTH_FILE]; + FILE *fp = NULL; + + if (gpass != NULL) { + // Use global passwords file + fp = fopen(gpass, "r"); + } else if (is_directory) { + 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) +/* + * This code implements the MD5 message-digest algorithm. + * The algorithm is due to Ron Rivest. This code was + * written by Colin Plumb in 1993, no copyright is claimed. + * This code is in the public domain; do with it what you wish. + * + * Equivalent code is available from RSA Data Security, Inc. + * This code has been tested against that, and is equivalent, + * except that you don't need to include two pages of legalese + * with every copy. + * + * To compute the message digest of a chunk of bytes, declare an + * MD5Context structure, pass it to MD5Init, call MD5Update as + * needed on buffers full of bytes, and then call MD5Final, which + * will fill a supplied 16-byte array with the digest. + */ + +typedef struct MD5Context { + 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; + + // 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))) +#define F2(x, y, z) F1(z, x, y) +#define F3(x, y, z) (x ^ y ^ z) +#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 ) + +// 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->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; +} + +static void MD5Update(MD5_CTX *ctx, unsigned char const *buf, unsigned len) { + 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 = (t >> 3) & 0x3f; + + 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; + } + + 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); +} + +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)); +} +#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"; + + 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; + + 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); + + 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]; + +#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); + + return mg_strcasecmp(response, expected_response) == 0 ? MG_TRUE : MG_FALSE; +} + + +// Authorize against the opened passwords file. Return 1 if authorized. +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; +} + + +// Return 1 if request is authorised, 0 otherwise. +static int is_authorized(struct connection *conn, const char *path, + int is_directory) { + FILE *fp; + int authorized = MG_TRUE; + + if ((fp = open_auth_file(conn, path, is_directory)) != NULL) { + authorized = mg_authorize_digest(&conn->mg_conn, fp); + fclose(fp); + } + + return authorized; +} + +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; + + // 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); + } + + return authorized; +} + +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 int parse_header(const char *str, int str_len, const char *var_name, + char *buf, size_t buf_size) { + int ch = ' ', ch1 = ',', len = 0, n = strlen(var_name); + const char *p, *end = str + str_len, *s = NULL; + + 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] == ch || s[-1] == ch1) && s[n] == '=' && + !memcmp(s, var_name, n)) break; + } + + if (s != NULL && &s[n + 1] < end) { + s += n + 1; + if (*s == '"' || *s == '\'') ch = ch1 = *s++; + p = s; + while (p < end && p[0] != ch && p[0] != ch1 && len < (int) buf_size) { + if (ch == ch1 && 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'; + } + } + + return len; +} + +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); +} + +#ifndef MONGOOSE_NO_SSI +static void send_ssi_file(struct mg_connection *, const char *, FILE *, int); + +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); + } +} + +static void do_ssi_include(struct mg_connection *conn, const char *ssi, + 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[IOBUF_SIZE]; + FILE *fp; + + 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, + 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 { + 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 + +static void proxy_request(struct ns_connection *pc, struct mg_connection *c) { + int i, sent_close_header = 0; + + ns_printf(pc, "%s %s%s%s HTTP/%s\r\n", c->request_method, c->uri, + c->query_string ? "?" : "", + c->query_string ? c->query_string : "", + 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); + +} + +#ifdef NS_ENABLE_SSL +int mg_terminate_ssl(struct mg_connection *c, const char *cert) { + static const char ok[] = "HTTP/1.0 200 OK\r\n\r\n"; + struct connection *conn = MG_CONN_2_CONN(c); + SSL_CTX *ctx; + + DBG(("%p MITM", conn)); + if ((ctx = SSL_CTX_new(SSLv23_server_method())) == NULL) return 0; + + 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. + // TODO(lsm): check for send() failure + send(conn->ns_conn->sock, ok, sizeof(ok) - 1, 0); + //DBG(("%p %lu %d SEND", c, (unsigned long) sizeof(ok) - 1, n)); + conn->ns_conn->send_iobuf.len = 0; + conn->endpoint_type = EP_USER; // To keep-alive in close_local_endpoint() + close_local_endpoint(conn); // Clean up current CONNECT request + if ((conn->ns_conn->ssl = SSL_new(ctx)) != NULL) { + SSL_set_fd(conn->ns_conn->ssl, conn->ns_conn->sock); + } + SSL_CTX_free(ctx); + return 1; +} +#endif + +int mg_forward(struct mg_connection *c, const char *addr) { + static const char ok[] = "HTTP/1.1 200 OK\r\n\r\n"; + struct connection *conn = MG_CONN_2_CONN(c); + struct ns_connection *pc; + + if ((pc = ns_connect(&conn->server->ns_mgr, addr, + mg_ev_handler, conn)) == NULL) { + conn->ns_conn->flags |= NSF_CLOSE_IMMEDIATELY; + return 0; + } + + // Interlink two connections + pc->flags |= MG_PROXY_CONN; + conn->endpoint_type = EP_PROXY; + conn->endpoint.nc = pc; + DBG(("%p [%s] [%s] -> %p %p", conn, c->uri, addr, pc, conn->ns_conn->ssl)); + + if (strcmp(c->request_method, "CONNECT") == 0) { + // For CONNECT request, reply with 200 OK. Tunnel is established. + // TODO(lsm): check for send() failure + (void) send(conn->ns_conn->sock, ok, sizeof(ok) - 1, 0); + } else { + // Strip "http://host:port" part from the URI + if (memcmp(c->uri, "http://", 7) == 0) c->uri += 7; + while (*c->uri != '\0' && *c->uri != '/') c->uri++; + proxy_request(pc, c); + } + return 1; +} + +static void proxify_connection(struct connection *conn) { + char proto[10], host[500], cert[500], addr[1000]; + unsigned short port = 80; + struct mg_connection *c = &conn->mg_conn; + int n = 0; + const char *url = c->uri; + + proto[0] = host[0] = cert[0] = '\0'; + if (sscanf(url, "%499[^: ]:%hu%n", host, &port, &n) != 2 && + sscanf(url, "%9[a-z]://%499[^: ]:%hu%n", proto, host, &port, &n) != 3 && + sscanf(url, "%9[a-z]://%499[^/ ]%n", proto, host, &n) != 2) { + n = 0; + } + + snprintf(addr, sizeof(addr), "%s://%s:%hu", + conn->ns_conn->ssl != NULL ? "ssl" : "tcp", host, port); + if (n <= 0 || !mg_forward(c, addr)) { + conn->ns_conn->flags |= NSF_CLOSE_IMMEDIATELY; + } +} + +#ifndef MONGOOSE_NO_FILESYSTEM +void mg_send_file_internal(struct mg_connection *c, const char *file_name, + file_stat_t *st, int exists, + const char *extra_headers) { + struct connection *conn = MG_CONN_2_CONN(c); + char path[MAX_PATH_SIZE]; + const int is_directory = S_ISDIR(st->st_mode); +#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 + + mg_snprintf(path, sizeof(path), "%s", file_name); + + 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, 0)) != -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, extra_headers); + } else { + send_http_error(conn, 404, NULL); + } +} +void mg_send_file(struct mg_connection *c, const char *file_name, + const char *extra_headers) { + file_stat_t st; + const int exists = stat(file_name, &st) == 0; + mg_send_file_internal(c, file_name, &st, exists, extra_headers); +} +#endif // !MONGOOSE_NO_FILESYSTEM + +static void open_local_endpoint(struct connection *conn, int skip_user) { +#ifndef MONGOOSE_NO_FILESYSTEM + char path[MAX_PATH_SIZE]; + file_stat_t st; + int exists = 0; +#endif + + // If EP_USER was set in a prev call, reset it + conn->endpoint_type = EP_NONE; + +#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 + + // 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 > %lu", + (unsigned long) MONGOOSE_POST_SIZE_LIMIT); + } + } +#endif + return; + } + + if (strcmp(conn->mg_conn.request_method, "CONNECT") == 0 || + mg_strncasecmp(conn->mg_conn.uri, "http", 4) == 0) { + const char *enp = conn->server->config_options[ENABLE_PROXY]; + if (enp == NULL || strcmp(enp, "yes") != 0) { + send_http_error(conn, 405, NULL); + } else { + proxify_connection(conn); + } + return; + } + + if (!strcmp(conn->mg_conn.request_method, "OPTIONS")) { + send_options(conn); + return; + } + +#ifdef MONGOOSE_NO_FILESYSTEM + send_http_error(conn, 404, NULL); +#else + exists = convert_uri_to_file_name(conn, path, sizeof(path), &st); + + 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, + exists && S_ISDIR(st.st_mode))) || + (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 (must_hide_file(conn, path)) { + send_http_error(conn, 404, NULL); + } 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 { + mg_send_file_internal(&conn->mg_conn, path, &st, exists, NULL); + } +#endif // MONGOOSE_NO_FILESYSTEM +} + +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"); + + if (expect_hdr != NULL && !mg_strcasecmp(expect_hdr, "100-continue")) { + ns_send(conn->ns_conn, expect_response, sizeof(expect_response) - 1); + } +} + +// 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 + mg_strncasecmp(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 *) NS_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 (0 && conn->request_len == 0) { + try_parse(conn); + DBG(("%p parsing -> %d", conn, conn->request_len)); + 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; + int n; + + if (conn->endpoint_type == EP_PROXY) { + if (conn->endpoint.nc != NULL) do_proxy(conn); + return; + } + + try_parse(conn); + DBG(("%p %d %lu %d", conn, conn->request_len, (unsigned long)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 + 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 (conn->endpoint_type == EP_USER) { + conn->mg_conn.content = io->buf; + conn->mg_conn.content_len = io->len; + n = call_user(conn, MG_RECV); + if (n < 0) { + conn->ns_conn->flags |= NSF_FINISHED_SENDING_DATA; + } else if ((size_t) n <= io->len) { + iobuf_remove(io, n); + } + 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 +} + +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_recv = conn->request_len = 0; + NS_FREE(conn->request); + conn->request = NULL; +} + +static void process_response(struct connection *conn) { + struct iobuf *io = &conn->ns_conn->recv_iobuf; + + try_parse(conn); + DBG(("%p %d %lu", conn, conn->request_len, (unsigned long)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); + } +} + +struct mg_connection *mg_connect(struct mg_server *server, const char *addr) { + struct ns_connection *nsconn; + struct connection *conn; + + nsconn = ns_connect(&server->ns_mgr, addr, mg_ev_handler, NULL); + if (nsconn == NULL) return 0; + + if ((conn = (struct connection *) NS_CALLOC(1, sizeof(*conn))) == NULL) { + nsconn->flags |= NSF_CLOSE_IMMEDIATELY; + return 0; + } + + // Interlink two structs + conn->ns_conn = nsconn; + nsconn->user_data = conn; + + conn->server = server; + conn->endpoint_type = EP_CLIENT; + //conn->handler = handler; + conn->mg_conn.server_param = server->ns_mgr.user_data; + conn->ns_conn->flags = NSF_CONNECTING; + + return &conn->mg_conn; +} + +#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 0", + 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); + log_header(c, "Referer", fp); + log_header(c, "User-Agent", fp); + fputc('\n', fp); + fflush(fp); + + funlockfile(fp); + fclose(fp); +} +#endif + +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->user_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 + + // Gobble possible POST data sent to the URI handler + iobuf_free(&conn->ns_conn->recv_iobuf); + NS_FREE(conn->request); + NS_FREE(conn->path_info); + conn->endpoint.nc = NULL; + conn->request = conn->path_info = NULL; + + conn->endpoint_type = EP_NONE; + conn->cl = conn->num_bytes_recv = 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); + + // Do not memset() the whole structure, as some of the fields + // (IP addresses & ports, server_param) must survive. Nullify the rest. + c->request_method = c->uri = c->http_version = c->query_string = NULL; + c->num_headers = c->status_code = c->is_websocket = c->content_len = 0; + c->connection_param = c->callback_param = 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; + + // If output buffer is too big, don't send anything. Wait until + // mongoose drains already buffered data to the client. + if (conn->ns_conn->send_iobuf.len > sizeof(buf) * 2) return; + + // Do not send anyt + 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_mgr_poll(&server->ns_mgr, milliseconds); +} + +void mg_destroy_server(struct mg_server **server) { + if (server != NULL && *server != NULL) { + struct mg_server *s = *server; + int i; + + ns_mgr_free(&s->ns_mgr); + for (i = 0; i < (int) ARRAY_SIZE(s->config_options); i++) { + NS_FREE(s->config_options[i]); // It is OK to free(NULL) + } + NS_FREE(s); + *server = NULL; + } +} + +struct mg_connection *mg_next(struct mg_server *s, struct mg_connection *c) { + struct ns_connection *nc = ns_next(&s->ns_mgr, c == NULL ? NULL : + MG_CONN_2_CONN(c)->ns_conn); + if (nc != NULL && nc->user_data != NULL) { + return & ((struct connection *) nc->user_data)->mg_conn; + } else { + return NULL; + } +} + +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; +} + +const char **mg_get_valid_option_names(void) { + return static_config_options; +} + +void mg_copy_listeners(struct mg_server *s, struct mg_server *to) { + struct ns_connection *c; + for (c = ns_next(&s->ns_mgr, NULL); c != NULL; c = ns_next(&s->ns_mgr, c)) { + struct ns_connection *tmp; + if ((c->flags & NSF_LISTENING) && + (tmp = (struct ns_connection *) NS_MALLOC(sizeof(*tmp))) != NULL) { + memcpy(tmp, c, sizeof(*tmp)); + tmp->mgr = &to->ns_mgr; + ns_add_conn(tmp->mgr, tmp); + } + } +} + +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) { + NS_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) { + struct vec vec; + while ((value = next_option(value, &vec, NULL)) != NULL) { + struct ns_connection *c = ns_bind(&server->ns_mgr, vec.ptr, + mg_ev_handler, NULL); + if (c== NULL) { + error_msg = "Cannot bind to port"; + break; + } else { + char buf[100]; + ns_sock_to_str(c->sock, buf, sizeof(buf), 2); + NS_FREE(*v); + *v = mg_strdup(buf); + } + } +#ifndef MONGOOSE_NO_FILESYSTEM + } else if (ind == HEXDUMP_FILE) { + server->ns_mgr.hexdump_file = *v; +#endif +#if !defined(_WIN32) && !defined(MONGOOSE_NO_USER) + } 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 + } + + return error_msg; +} + +static void set_ips(struct ns_connection *nc, int is_rem) { + struct connection *conn = (struct connection *) nc->user_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->mgr; + struct connection *conn; + + if (!check_acl(server->config_options[ACCESS_CONTROL_LIST], + ntohl(* (uint32_t *) &sa->sin.sin_addr)) || + (conn = (struct connection *) NS_CALLOC(1, sizeof(*conn))) == NULL) { + nc->flags |= NSF_CLOSE_IMMEDIATELY; + } else { + // Circularly link two connection structures + nc->user_data = conn; + conn->ns_conn = nc; + + // Initialize the rest of connection attributes + conn->server = server; + conn->mg_conn.server_param = nc->mgr->user_data; + set_ips(nc, 1); + set_ips(nc, 0); + } +} + +static void process_udp(struct ns_connection *nc) { + struct iobuf *io = &nc->recv_iobuf; + struct connection conn; + + memset(&conn, 0, sizeof(conn)); + conn.ns_conn = nc; + conn.server = (struct mg_server *) nc->mgr; + conn.request_len = parse_http_message(io->buf, io->len, &conn.mg_conn); + on_recv_data(&conn); + //ns_printf(nc, "%s", "HTTP/1.0 200 OK\r\n\r\n"); +} + +static void mg_ev_handler(struct ns_connection *nc, int ev, void *p) { + struct connection *conn = (struct connection *) nc->user_data; + + // 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->user_data; + void *param[2] = { nc, p }; + if (conn != NULL) conn->mg_conn.callback_param = param; + call_user(conn, (enum mg_event) ev); + } +#endif + + switch (ev) { + case NS_ACCEPT: + on_accept(nc, (union socket_address *) p); +#ifdef MONGOOSE_SEND_NS_EVENTS + { + struct connection *conn = (struct connection *) nc->user_data; + void *param[2] = { nc, p }; + if (conn != NULL) conn->mg_conn.callback_param = param; + call_user(conn, (enum mg_event) ev); + } +#endif + break; + + case NS_CONNECT: + if (nc->user_data != NULL) { + set_ips(nc, 1); + set_ips(nc, 0); + } + 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: + if (conn != NULL) { + conn->num_bytes_recv += * (int *) p; + } + + if (nc->flags & NSF_UDP) { + process_udp(nc); + } else if (nc->listener != NULL) { + on_recv_data(conn); +#ifndef MONGOOSE_NO_CGI + } else if (nc->flags & MG_CGI_CONN) { + on_cgi_data(nc); +#endif + } else if (nc->flags & MG_PROXY_CONN) { + if (conn != NULL) { + ns_forward(nc, conn->ns_conn); + } + } else { + process_response(conn); + } + break; + + case NS_SEND: + break; + + case NS_CLOSE: + nc->user_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; + NS_FREE(conn); + } + break; + + case NS_POLL: + if (conn != NULL) { + if (call_user(conn, MG_POLL) == MG_TRUE) { + if (conn->ns_conn->flags & MG_HEADERS_SENT) { + write_terminating_chunk(conn); + } + close_local_endpoint(conn); + } + + if (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->listener != NULL && + 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, int ev, void *param) { + mg_handler_t func = NULL; + struct connection *conn = (struct connection *) nc->user_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 != 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_broadcast(&server->ns_mgr, iter2, buf, len + 1); +} + +void mg_wakeup_server(struct mg_server *server) { + ns_broadcast(&server->ns_mgr, NULL, (void *) "", 0); +} + +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 *) NS_CALLOC(1, sizeof(*server)); + ns_mgr_init(&server->ns_mgr, server_data); + set_default_option_values(server->config_options); + server->event_handler = handler; + return server; +} |