From 7957feaefca16cffe92369f94ca44bd8d6ec1a07 Mon Sep 17 00:00:00 2001 From: Patrick Mackinlay Date: Mon, 30 Jul 2018 15:52:11 +0700 Subject: taptun: add support for Windows (#3790) * taptun: add support for Windows Looking for feedback only at this point, because it's the first time I've attempted any OSD stuff - be gentle. This extends the existing taptun OSD module to support Windows through the TAP-Windows6 driver (https://github.com/OpenVPN/tap-windows6). * TAP-Windows6 is GPLv2, however only the header file is required in MAME, and the driver itself is entirely optional. * I've tried to minimise the size of the diff, rather than completely separate the Windows/non-Windows implementations - not sure which is preferable in this case. * The license file has Mac(?) line-endings - unsure if they should be normalized or used verbatim. * Uncertain about the non-Windows case (or the Windows SDL case) - existing code uses __linux__, but I'm not clear on how that works with OSX, for example? * I can't claim this actually "works" yet, because I don't know enough to configure the tap end of it properly to get networking doing something useful, but I will get there and correct anything necessary in a subsequent real PR. * minor fixes/improvements (nw) * Use Unicode Windows APIs, and UTF-8 for MAME * Deal with unterminated registry string values * Cancel any pending I/O in destructor --- 3rdparty/README.md | 2 + 3rdparty/tap-windows6/license.txt | 360 ++++++++++++++++++++++++++++++++++++ 3rdparty/tap-windows6/tap-windows.h | 74 ++++++++ scripts/src/osd/windows_cfg.lua | 1 + src/osd/modules/netdev/taptun.cpp | 190 +++++++++++++++++++ 5 files changed, 627 insertions(+) create mode 100644 3rdparty/tap-windows6/license.txt create mode 100644 3rdparty/tap-windows6/tap-windows.h diff --git a/3rdparty/README.md b/3rdparty/README.md index 98caa58240e..9eaf693124a 100644 --- a/3rdparty/README.md +++ b/3rdparty/README.md @@ -56,6 +56,8 @@ sol2 - [The MIT License (MIT)](http://opensource.org/licenses/MIT) sqlite3 - Public Domain +tap-windows6 - [The GNU General Public License, version 2](https://opensource.org/licenses/GPL-2.0) + winpcap - [The BSD 3-Clause License](http://opensource.org/licenses/BSD-3-Clause) zlib - [zlib license](http://opensource.org/licenses/Zlib) diff --git a/3rdparty/tap-windows6/license.txt b/3rdparty/tap-windows6/license.txt new file mode 100644 index 00000000000..ae85fb6c451 --- /dev/null +++ b/3rdparty/tap-windows6/license.txt @@ -0,0 +1,360 @@ +tap-windows6 license +-------------------- + +The source and object code of the tap-windows6 project +is Copyright (C) 2002-2014 OpenVPN Technologies, Inc. The +NSIS installer is Copyright (C) 2014 OpenVPN Technologies, +Inc. and (C) 2012 Alon Bar-Lev. Both are released under the +GPL version 2. See COPYRIGHT.GPL for the full GPL license. +The licensors also make the following statement borrowed +from the SPICE project: + +With respect to binaries built using the Microsoft(R) +Windows Driver Kit (WDK), GPLv2 does not extend to any code +contained in or derived from the WDK ("WDK Code"). As to +WDK Code, by using or distributing such binaries you agree +to be bound by the Microsoft Software License Terms for the +WDK. 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If this is what you want to do, use the GNU Lesser General +Public License instead of this License. + diff --git a/3rdparty/tap-windows6/tap-windows.h b/3rdparty/tap-windows6/tap-windows.h new file mode 100644 index 00000000000..d546a5b1cb9 --- /dev/null +++ b/3rdparty/tap-windows6/tap-windows.h @@ -0,0 +1,74 @@ +/* + * TAP-Windows -- A kernel driver to provide virtual tap + * device functionality on Windows. + * + * This code was inspired by the CIPE-Win32 driver by Damion K. Wilson. + * + * This source code is Copyright (C) 2002-2014 OpenVPN Technologies, Inc., + * and is released under the GPL version 2 (see below). + * + * This program is free software; 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. + * + * This program is distributed in the hope that it will be useful, + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program (see the file COPYING included with this + * distribution); if not, write to the Free Software Foundation, Inc., + * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ +#ifndef __TAP_WIN_H +#define __TAP_WIN_H + +/* + * ============= + * TAP IOCTLs + * ============= + */ + +#define TAP_WIN_CONTROL_CODE(request,method) \ + CTL_CODE (FILE_DEVICE_UNKNOWN, request, method, FILE_ANY_ACCESS) + +/* Present in 8.1 */ + +#define TAP_WIN_IOCTL_GET_MAC TAP_WIN_CONTROL_CODE (1, METHOD_BUFFERED) +#define TAP_WIN_IOCTL_GET_VERSION TAP_WIN_CONTROL_CODE (2, METHOD_BUFFERED) +#define TAP_WIN_IOCTL_GET_MTU TAP_WIN_CONTROL_CODE (3, METHOD_BUFFERED) +#define TAP_WIN_IOCTL_GET_INFO TAP_WIN_CONTROL_CODE (4, METHOD_BUFFERED) +#define TAP_WIN_IOCTL_CONFIG_POINT_TO_POINT TAP_WIN_CONTROL_CODE (5, METHOD_BUFFERED) +#define TAP_WIN_IOCTL_SET_MEDIA_STATUS TAP_WIN_CONTROL_CODE (6, METHOD_BUFFERED) +#define TAP_WIN_IOCTL_CONFIG_DHCP_MASQ TAP_WIN_CONTROL_CODE (7, METHOD_BUFFERED) +#define TAP_WIN_IOCTL_GET_LOG_LINE TAP_WIN_CONTROL_CODE (8, METHOD_BUFFERED) +#define TAP_WIN_IOCTL_CONFIG_DHCP_SET_OPT TAP_WIN_CONTROL_CODE (9, METHOD_BUFFERED) + +/* Added in 8.2 */ + +/* obsoletes TAP_WIN_IOCTL_CONFIG_POINT_TO_POINT */ +#define TAP_WIN_IOCTL_CONFIG_TUN TAP_WIN_CONTROL_CODE (10, METHOD_BUFFERED) + +/* + * ================= + * Registry keys + * ================= + */ + +#define ADAPTER_KEY "SYSTEM\\CurrentControlSet\\Control\\Class\\{4D36E972-E325-11CE-BFC1-08002BE10318}" + +#define NETWORK_CONNECTIONS_KEY "SYSTEM\\CurrentControlSet\\Control\\Network\\{4D36E972-E325-11CE-BFC1-08002BE10318}" + +/* + * ====================== + * Filesystem prefixes + * ====================== + */ + +#define USERMODEDEVICEDIR "\\\\.\\Global\\" +#define SYSDEVICEDIR "\\Device\\" +#define USERDEVICEDIR "\\DosDevices\\Global\\" +#define TAP_WIN_SUFFIX ".tap" + +#endif // __TAP_WIN_H diff --git a/scripts/src/osd/windows_cfg.lua b/scripts/src/osd/windows_cfg.lua index 73598da6760..2735e4df4f0 100644 --- a/scripts/src/osd/windows_cfg.lua +++ b/scripts/src/osd/windows_cfg.lua @@ -41,6 +41,7 @@ if not _OPTIONS["DONT_USE_NETWORK"] then defines { "USE_NETWORK", "OSD_NET_USE_PCAP", + "OSD_NET_USE_TAPTUN", } end diff --git a/src/osd/modules/netdev/taptun.cpp b/src/osd/modules/netdev/taptun.cpp index 32e86a64f90..b81ae99826c 100644 --- a/src/osd/modules/netdev/taptun.cpp +++ b/src/osd/modules/netdev/taptun.cpp @@ -2,11 +2,16 @@ // copyright-holders:Carl #if defined(OSD_NET_USE_TAPTUN) +#if defined(WIN32) +#include +#include +#else #include #include #include #include #include +#endif #include "emu.h" #include "osdnet.h" @@ -17,6 +22,12 @@ #define IFF_TAP 0x0002 #define IFF_NO_PI 0x1000 #define TUNSETIFF _IOW('T', 202, int) +#elif defined(WIN32) +#include "tap-windows6/tap-windows.h" + +// for some reason this isn't defined in the header, and presumably it changes +// with major? versions of the driver - perhaps it should be configurable? +#define PRODUCT_TAP_WIN_COMPONENT_ID "tap0901" #endif class taptun_module : public osd_module, public netdev_module @@ -48,8 +59,14 @@ public: protected: int recv_dev(uint8_t **buf); private: +#if defined(WIN32) + HANDLE m_handle; + OVERLAPPED m_overlapped; + bool m_receive_pending; +#else int m_fd; char m_ifname[10]; +#endif char m_mac[6]; uint8_t m_buf[2048]; }; @@ -78,7 +95,22 @@ netdev_tap::netdev_tap(const char *name, class device_network_interface *ifdev, osd_printf_verbose("netdev_tap: network up!\n"); strncpy(m_ifname, ifr.ifr_name, 10); fcntl(m_fd, F_SETFL, O_NONBLOCK); +#elif defined(WIN32) + std::wstring device_path(L"" USERMODEDEVICEDIR); + device_path.append(wstring_from_utf8(name)); + device_path.append(L"" TAP_WIN_SUFFIX); + + m_handle = CreateFileW(device_path.c_str(), GENERIC_READ | GENERIC_WRITE, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM | FILE_FLAG_OVERLAPPED, 0); + if (m_handle != INVALID_HANDLE_VALUE) + { + ULONG status = TRUE; + DWORD len; + + // set media status to connected + DeviceIoControl(m_handle, TAP_WIN_IOCTL_SET_MEDIA_STATUS, &status, sizeof(status), &status, sizeof(status), &len, NULL); + } + m_receive_pending = false; #else m_fd = -1; #endif @@ -86,7 +118,17 @@ netdev_tap::netdev_tap(const char *name, class device_network_interface *ifdev, netdev_tap::~netdev_tap() { +#if defined(WIN32) + if (m_handle != INVALID_HANDLE_VALUE) + { + if (m_receive_pending) + CancelIo(m_handle); + + CloseHandle(m_handle); + } +#else close(m_fd); +#endif } void netdev_tap::set_mac(const char *mac) @@ -94,6 +136,148 @@ void netdev_tap::set_mac(const char *mac) memcpy(m_mac, mac, 6); } +#if defined(WIN32) +int netdev_tap::send(uint8_t *buf, int len) +{ + OVERLAPPED overlapped = {}; + + if (m_handle == INVALID_HANDLE_VALUE) + return 0; + + if (WriteFile(m_handle, buf, len, NULL, &overlapped) || GetLastError() == ERROR_IO_PENDING) + { + DWORD bytes_transferred; + + // block until transfer complete + if (GetOverlappedResult(m_handle, &overlapped, &bytes_transferred, TRUE)) + return bytes_transferred; + } + + return 0; +} + +int netdev_tap::recv_dev(uint8_t **buf) +{ + DWORD bytes_transferred; + + if (m_handle == INVALID_HANDLE_VALUE) + return 0; + + if (!m_receive_pending) + { + // start a new asynchronous read + m_overlapped = {}; + if (ReadFile(m_handle, m_buf, sizeof(m_buf), &bytes_transferred, &m_overlapped)) + { + // handle unexpected synchronous completion + *buf = m_buf; + + return bytes_transferred; + } + else if (GetLastError() == ERROR_IO_PENDING) + m_receive_pending = true; + } + else + { + if (GetOverlappedResult(m_handle, &m_overlapped, &bytes_transferred, FALSE)) + { + // handle asynchronous completion + m_receive_pending = false; + *buf = m_buf; + + return bytes_transferred; + } + } + + return 0; +} + +static std::wstring safe_string(WCHAR value[], int length) +{ + if (value[length] != L'\0') + value[length + 1] = L'\0'; + + return std::wstring(value); +} + +// find the friendly name for an adapter in the registry +static std::wstring get_connection_name(std::wstring &id) +{ + std::wstring result; + + std::wstring connection(L"" NETWORK_CONNECTIONS_KEY PATH_SEPARATOR); + connection.append(id); + connection.append(PATH_SEPARATOR L"Connection"); + + HKEY connection_key; + + if (RegOpenKeyExW(HKEY_LOCAL_MACHINE, connection.c_str(), 0, KEY_READ, &connection_key) == ERROR_SUCCESS) + { + WCHAR connection_name[MAX_PATH]; + DWORD connection_name_len = sizeof(connection_name); + DWORD data_type; + + if (RegQueryValueExW(connection_key, L"Name", NULL, &data_type, LPBYTE(connection_name), &connection_name_len) == ERROR_SUCCESS && data_type == REG_SZ) + { + result.assign(safe_string(connection_name, connection_name_len)); + } + } + + return result; +} + +// find TAP-Windows adapters by scanning the registry +static std::vector get_tap_adapters() +{ + std::vector result; + HKEY adapter_key; + + if (RegOpenKeyExW(HKEY_LOCAL_MACHINE, L"" ADAPTER_KEY, 0, KEY_READ, &adapter_key) == ERROR_SUCCESS) + { + int i = 0; + WCHAR enum_name[MAX_PATH]; + DWORD enum_name_len = sizeof(enum_name); + + // iterate through all the adapters + while (RegEnumKeyExW(adapter_key, i, enum_name, &enum_name_len, NULL, NULL, NULL, NULL) == ERROR_SUCCESS) + { + std::wstring unit_string(L"" ADAPTER_KEY PATH_SEPARATOR); + unit_string.append(enum_name); + HKEY unit_key; + + if (RegOpenKeyExW(HKEY_LOCAL_MACHINE, unit_string.c_str(), 0, KEY_READ, &unit_key) == ERROR_SUCCESS) + { + WCHAR component_id[MAX_PATH]; + DWORD component_id_len = sizeof(component_id); + DWORD data_type; + + // check if the ComponentId value indicates a TAP-Windows adapter + if (RegQueryValueExW(unit_key, L"ComponentId", NULL, &data_type, LPBYTE(component_id), &component_id_len) == ERROR_SUCCESS + && data_type == REG_SZ + && safe_string(component_id, component_id_len) == L"" PRODUCT_TAP_WIN_COMPONENT_ID) + { + WCHAR net_cfg_instance_id[MAX_PATH]; + DWORD net_cfg_instance_id_len = sizeof(net_cfg_instance_id); + + // add the adapter to the result + if (RegQueryValueExW(unit_key, L"NetCfgInstanceId", NULL, &data_type, LPBYTE(net_cfg_instance_id), &net_cfg_instance_id_len) == ERROR_SUCCESS + && data_type == REG_SZ) + result.push_back(safe_string(net_cfg_instance_id, net_cfg_instance_id_len)); + } + + RegCloseKey(unit_key); + } + + enum_name_len = sizeof(enum_name); + i++; + } + + RegCloseKey(adapter_key); + } + + return result; +} +#else int netdev_tap::send(uint8_t *buf, int len) { if(m_fd == -1) return 0; @@ -113,6 +297,7 @@ int netdev_tap::recv_dev(uint8_t **buf) *buf = m_buf; return (len == -1)?0:len; } +#endif static CREATE_NETDEV(create_tap) { @@ -122,7 +307,12 @@ static CREATE_NETDEV(create_tap) int taptun_module::init(const osd_options &options) { +#if defined(WIN32) + for (std::wstring &id : get_tap_adapters()) + add_netdev(utf8_from_wstring(id).c_str(), utf8_from_wstring(get_connection_name(id)).c_str(), create_tap); +#else add_netdev("tap", "TAP/TUN Device", create_tap); +#endif return 0; } -- cgit v1.2.3