2003-07-28 21:54:03 +00:00
|
|
|
/*
|
2003-07-29 11:06:23 +00:00
|
|
|
device.c -- Interaction with Windows tap driver in a MinGW environment
|
2006-04-26 13:52:58 +00:00
|
|
|
Copyright (C) 2002-2005 Ivo Timmermans,
|
2009-03-05 13:12:36 +00:00
|
|
|
2002-2009 Guus Sliepen <guus@tinc-vpn.org>
|
2003-07-28 21:54:03 +00:00
|
|
|
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
|
|
it under the terms of the GNU General Public License as published by
|
|
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
|
|
(at your option) any later version.
|
|
|
|
|
|
|
|
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.
|
|
|
|
|
2009-09-24 22:01:00 +00:00
|
|
|
You should have received a copy of the GNU General Public License along
|
|
|
|
with this program; if not, write to the Free Software Foundation, Inc.,
|
|
|
|
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
2003-07-28 21:54:03 +00:00
|
|
|
*/
|
|
|
|
|
|
|
|
#include "system.h"
|
|
|
|
|
|
|
|
#include <windows.h>
|
|
|
|
#include <winioctl.h>
|
|
|
|
|
|
|
|
#include "conf.h"
|
|
|
|
#include "logger.h"
|
|
|
|
#include "net.h"
|
|
|
|
#include "route.h"
|
|
|
|
#include "utils.h"
|
|
|
|
#include "xalloc.h"
|
|
|
|
|
2004-10-01 18:26:15 +00:00
|
|
|
#include "mingw/common.h"
|
2003-07-28 21:54:03 +00:00
|
|
|
|
2009-09-15 20:59:01 +00:00
|
|
|
int device_fd = -1;
|
2004-11-01 17:02:19 +00:00
|
|
|
static HANDLE device_handle = INVALID_HANDLE_VALUE;
|
2003-07-28 21:54:03 +00:00
|
|
|
char *device = NULL;
|
|
|
|
char *iface = NULL;
|
2009-01-03 21:06:10 +00:00
|
|
|
static char *device_info = NULL;
|
2003-07-28 21:54:03 +00:00
|
|
|
|
2004-11-01 17:02:19 +00:00
|
|
|
static int device_total_in = 0;
|
|
|
|
static int device_total_out = 0;
|
2003-07-28 21:54:03 +00:00
|
|
|
|
2003-08-03 21:45:41 +00:00
|
|
|
extern char *myport;
|
|
|
|
|
2009-01-03 21:06:10 +00:00
|
|
|
static DWORD WINAPI tapreader(void *bla) {
|
2009-09-15 20:59:01 +00:00
|
|
|
int status;
|
2003-07-29 22:59:01 +00:00
|
|
|
long len;
|
|
|
|
OVERLAPPED overlapped;
|
2009-09-15 20:59:01 +00:00
|
|
|
vpn_packet_t packet;
|
2007-05-16 14:46:25 +00:00
|
|
|
|
2003-07-29 22:59:01 +00:00
|
|
|
logger(LOG_DEBUG, _("Tap reader running"));
|
|
|
|
|
|
|
|
/* Read from tap device and send to parent */
|
|
|
|
|
|
|
|
overlapped.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
|
2009-09-15 20:59:01 +00:00
|
|
|
|
2003-07-29 22:59:01 +00:00
|
|
|
for(;;) {
|
|
|
|
overlapped.Offset = 0;
|
|
|
|
overlapped.OffsetHigh = 0;
|
|
|
|
ResetEvent(overlapped.hEvent);
|
|
|
|
|
2009-09-15 20:59:01 +00:00
|
|
|
status = ReadFile(device_handle, packet.data, MTU, &len, &overlapped);
|
2003-07-29 22:59:01 +00:00
|
|
|
|
|
|
|
if(!status) {
|
|
|
|
if(GetLastError() == ERROR_IO_PENDING) {
|
|
|
|
WaitForSingleObject(overlapped.hEvent, INFINITE);
|
|
|
|
if(!GetOverlappedResult(device_handle, &overlapped, &len, FALSE))
|
|
|
|
continue;
|
|
|
|
} else {
|
|
|
|
logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
|
|
|
|
device, strerror(errno));
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2009-09-15 20:59:01 +00:00
|
|
|
EnterCriticalSection(&mutex);
|
|
|
|
packet.len = len;
|
|
|
|
packet.priority = 0;
|
|
|
|
route(myself, &packet);
|
|
|
|
LeaveCriticalSection(&mutex);
|
2003-07-29 22:59:01 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2003-07-28 21:54:03 +00:00
|
|
|
bool setup_device(void)
|
|
|
|
{
|
|
|
|
HKEY key, key2;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
char regpath[1024];
|
|
|
|
char adapterid[1024];
|
|
|
|
char adaptername[1024];
|
|
|
|
char tapname[1024];
|
|
|
|
long len;
|
2003-10-08 11:37:53 +00:00
|
|
|
unsigned long status;
|
2003-07-28 21:54:03 +00:00
|
|
|
|
|
|
|
bool found = false;
|
|
|
|
|
2003-07-29 22:59:01 +00:00
|
|
|
int sock, err;
|
|
|
|
HANDLE thread;
|
|
|
|
|
|
|
|
struct addrinfo *ai;
|
|
|
|
struct addrinfo hint = {
|
|
|
|
.ai_family = AF_UNSPEC,
|
2007-01-03 18:18:54 +00:00
|
|
|
.ai_socktype = SOCK_STREAM,
|
|
|
|
.ai_protocol = IPPROTO_TCP,
|
2007-01-04 15:28:36 +00:00
|
|
|
.ai_flags = 0,
|
2003-07-29 22:59:01 +00:00
|
|
|
};
|
|
|
|
|
2003-07-28 21:54:03 +00:00
|
|
|
cp();
|
|
|
|
|
|
|
|
get_config_string(lookup_config(config_tree, "Device"), &device);
|
|
|
|
get_config_string(lookup_config(config_tree, "Interface"), &iface);
|
|
|
|
|
|
|
|
/* Open registry and look for network adapters */
|
|
|
|
|
2004-10-01 18:26:15 +00:00
|
|
|
if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, NETWORK_CONNECTIONS_KEY, 0, KEY_READ, &key)) {
|
2003-08-02 21:01:50 +00:00
|
|
|
logger(LOG_ERR, _("Unable to read registry: %s"), winerror(GetLastError()));
|
2003-07-28 21:54:03 +00:00
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
for (i = 0; ; i++) {
|
|
|
|
len = sizeof(adapterid);
|
|
|
|
if(RegEnumKeyEx(key, i, adapterid, &len, 0, 0, 0, NULL))
|
|
|
|
break;
|
|
|
|
|
|
|
|
/* Find out more about this adapter */
|
|
|
|
|
2004-10-01 18:26:15 +00:00
|
|
|
snprintf(regpath, sizeof(regpath), "%s\\%s\\Connection", NETWORK_CONNECTIONS_KEY, adapterid);
|
2003-07-28 21:54:03 +00:00
|
|
|
|
2003-07-29 12:38:49 +00:00
|
|
|
if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, regpath, 0, KEY_READ, &key2))
|
|
|
|
continue;
|
2003-07-28 21:54:03 +00:00
|
|
|
|
|
|
|
len = sizeof(adaptername);
|
2003-08-08 19:49:47 +00:00
|
|
|
err = RegQueryValueEx(key2, "Name", 0, 0, adaptername, &len);
|
2003-07-28 21:54:03 +00:00
|
|
|
|
2003-08-01 08:18:22 +00:00
|
|
|
RegCloseKey(key2);
|
2003-07-29 23:21:01 +00:00
|
|
|
|
2003-08-08 19:49:47 +00:00
|
|
|
if(err)
|
|
|
|
continue;
|
|
|
|
|
2003-07-29 12:38:49 +00:00
|
|
|
if(device) {
|
|
|
|
if(!strcmp(device, adapterid)) {
|
|
|
|
found = true;
|
|
|
|
break;
|
|
|
|
} else
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
2003-07-28 21:54:03 +00:00
|
|
|
if(iface) {
|
|
|
|
if(!strcmp(iface, adaptername)) {
|
|
|
|
found = true;
|
|
|
|
break;
|
|
|
|
} else
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
snprintf(tapname, sizeof(tapname), USERMODEDEVICEDIR "%s" TAPSUFFIX, adapterid);
|
2003-07-29 22:59:01 +00:00
|
|
|
device_handle = CreateFile(tapname, GENERIC_WRITE | GENERIC_READ, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM | FILE_FLAG_OVERLAPPED, 0);
|
|
|
|
if(device_handle != INVALID_HANDLE_VALUE) {
|
2003-07-28 21:54:03 +00:00
|
|
|
found = true;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2003-08-01 08:18:22 +00:00
|
|
|
RegCloseKey(key);
|
2003-07-29 23:21:01 +00:00
|
|
|
|
2003-07-28 21:54:03 +00:00
|
|
|
if(!found) {
|
|
|
|
logger(LOG_ERR, _("No Windows tap device found!"));
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
2003-07-29 22:59:01 +00:00
|
|
|
if(!device)
|
|
|
|
device = xstrdup(adapterid);
|
|
|
|
|
|
|
|
if(!iface)
|
|
|
|
iface = xstrdup(adaptername);
|
2003-07-28 21:54:03 +00:00
|
|
|
|
|
|
|
/* Try to open the corresponding tap device */
|
|
|
|
|
2003-07-29 22:59:01 +00:00
|
|
|
if(device_handle == INVALID_HANDLE_VALUE) {
|
2003-07-28 21:54:03 +00:00
|
|
|
snprintf(tapname, sizeof(tapname), USERMODEDEVICEDIR "%s" TAPSUFFIX, device);
|
2003-07-29 22:59:01 +00:00
|
|
|
device_handle = CreateFile(tapname, GENERIC_WRITE | GENERIC_READ, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM | FILE_FLAG_OVERLAPPED, 0);
|
2003-07-28 21:54:03 +00:00
|
|
|
}
|
|
|
|
|
2003-07-29 22:59:01 +00:00
|
|
|
if(device_handle == INVALID_HANDLE_VALUE) {
|
2003-08-08 19:49:47 +00:00
|
|
|
logger(LOG_ERR, _("%s (%s) is not a usable Windows tap device: %s"), device, iface, winerror(GetLastError()));
|
2003-07-28 21:54:03 +00:00
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Get MAC address from tap device */
|
|
|
|
|
2003-07-29 22:59:01 +00:00
|
|
|
if(!DeviceIoControl(device_handle, TAP_IOCTL_GET_MAC, mymac.x, sizeof(mymac.x), mymac.x, sizeof(mymac.x), &len, 0)) {
|
2003-08-08 19:49:47 +00:00
|
|
|
logger(LOG_ERR, _("Could not get MAC address from Windows tap device %s (%s): %s"), device, iface, winerror(GetLastError()));
|
2003-07-28 21:54:03 +00:00
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
if(routing_mode == RMODE_ROUTER) {
|
|
|
|
overwrite_mac = 1;
|
|
|
|
}
|
|
|
|
|
2003-07-29 22:59:01 +00:00
|
|
|
/* Start the tap reader */
|
|
|
|
|
|
|
|
thread = CreateThread(NULL, 0, tapreader, NULL, 0, NULL);
|
|
|
|
|
|
|
|
if(!thread) {
|
2003-08-02 21:01:50 +00:00
|
|
|
logger(LOG_ERR, _("System call `%s' failed: %s"), "CreateThread", winerror(GetLastError()));
|
2003-07-29 22:59:01 +00:00
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
2003-10-08 11:37:53 +00:00
|
|
|
/* Set media status for newer TAP-Win32 devices */
|
|
|
|
|
|
|
|
status = true;
|
|
|
|
DeviceIoControl(device_handle, TAP_IOCTL_SET_MEDIA_STATUS, &status, sizeof(status), &status, sizeof(status), &len, NULL);
|
|
|
|
|
2003-07-28 21:54:03 +00:00
|
|
|
device_info = _("Windows tap device");
|
|
|
|
|
|
|
|
logger(LOG_INFO, _("%s (%s) is a %s"), device, iface, device_info);
|
|
|
|
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
void close_device(void)
|
|
|
|
{
|
|
|
|
cp();
|
|
|
|
|
2003-07-29 22:59:01 +00:00
|
|
|
CloseHandle(device_handle);
|
2009-01-09 11:36:06 +00:00
|
|
|
|
|
|
|
free(device);
|
|
|
|
free(iface);
|
2003-07-28 21:54:03 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
bool read_packet(vpn_packet_t *packet)
|
|
|
|
{
|
2009-09-15 20:59:01 +00:00
|
|
|
return false;
|
2003-07-28 21:54:03 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
bool write_packet(vpn_packet_t *packet)
|
|
|
|
{
|
2003-07-29 12:38:49 +00:00
|
|
|
long lenout;
|
2003-07-29 22:59:01 +00:00
|
|
|
OVERLAPPED overlapped = {0};
|
2003-07-28 21:54:03 +00:00
|
|
|
|
|
|
|
cp();
|
|
|
|
|
|
|
|
ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
|
|
|
|
packet->len, device_info);
|
|
|
|
|
2003-07-29 22:59:01 +00:00
|
|
|
if(!WriteFile(device_handle, packet->data, packet->len, &lenout, &overlapped)) {
|
2003-08-02 21:01:50 +00:00
|
|
|
logger(LOG_ERR, _("Error while writing to %s %s: %s"), device_info, device, winerror(GetLastError()));
|
2003-07-28 21:54:03 +00:00
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
device_total_out += packet->len;
|
|
|
|
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
void dump_device_stats(void)
|
|
|
|
{
|
|
|
|
cp();
|
|
|
|
|
|
|
|
logger(LOG_DEBUG, _("Statistics for %s %s:"), device_info, device);
|
|
|
|
logger(LOG_DEBUG, _(" total bytes in: %10d"), device_total_in);
|
|
|
|
logger(LOG_DEBUG, _(" total bytes out: %10d"), device_total_out);
|
|
|
|
}
|