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taptun: add support for Windows (#3790)

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* 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
This commit is contained in:
Patrick Mackinlay 2018-07-30 15:52:11 +07:00 committed by Vas Crabb
parent ecc609e22d
commit 7957feaefc
5 changed files with 627 additions and 0 deletions
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2
3rdparty/README.md vendored
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@ -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)

360
3rdparty/tap-windows6/license.txt vendored Normal file
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@ -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. All WDK Code is considered by the GPLv2 licensors to
qualify for the special exception stated in section 3 of
GPLv2 (commonly known as the system library exception).
GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
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74
3rdparty/tap-windows6/tap-windows.h vendored Normal file
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@ -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

1
scripts/src/osd/windows_cfg.lua
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@ -41,6 +41,7 @@ if not _OPTIONS["DONT_USE_NETWORK"] then
defines {
"USE_NETWORK",
"OSD_NET_USE_PCAP",
"OSD_NET_USE_TAPTUN",
}
end

190
src/osd/modules/netdev/taptun.cpp
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@ -2,11 +2,16 @@
// copyright-holders:Carl
#if defined(OSD_NET_USE_TAPTUN)
#if defined(WIN32)
#include <windows.h>
#include <winioctl.h>
#else
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <errno.h>
#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<std::wstring> get_tap_adapters()
{
std::vector<std::wstring> 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;
}