/*
- device.c -- Interaction with CIPE driver in a MinGW environment
- Copyright (C) 2002-2003 Ivo Timmermans <ivo@o2w.nl>,
- 2002-2003 Guus Sliepen <guus@sliepen.eu.org>
+ device.c -- Interaction with Windows tap driver in a MinGW environment
+ Copyright (C) 2002-2005 Ivo Timmermans,
+ 2002-2009 Guus Sliepen <guus@tinc-vpn.org>
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
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., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- $Id: device.c,v 1.1.2.3 2003/07/28 21:54:03 guus Exp $
*/
#include "system.h"
#include "utils.h"
#include "xalloc.h"
-#define NETCARD_REG_KEY_2000 "SYSTEM\\CurrentControlSet\\Control\\Class\\{4D36E972-E325-11CE-BFC1-08002BE10318}"
-#define NETCARD_REG_KEY "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\NetworkCards"
-#define REG_SERVICE_KEY "SYSTEM\\CurrentControlSet\\Services"
-#define REG_CONTROL_NET "SYSTEM\\CurrentControlSet\\Control\\Network\\{4D36E972-E325-11CE-BFC1-08002BE10318}"
+#include "mingw/common.h"
-#define USERMODEDEVICEDIR "\\\\.\\"
-#define SYSDEVICEDIR "\\Device\\"
-#define USERDEVICEDIR "\\??\\"
-#define TAPSUFFIX ".tap"
+int device_fd = -1;
+static HANDLE device_handle = INVALID_HANDLE_VALUE;
+char *device = NULL;
+char *iface = NULL;
+static char *device_info = NULL;
-#define TAP_CONTROL_CODE(request,method) CTL_CODE(FILE_DEVICE_PHYSICAL_NETCARD | 8000, request, method, FILE_ANY_ACCESS)
+static int device_total_in = 0;
+static int device_total_out = 0;
-#define TAP_IOCTL_GET_LASTMAC TAP_CONTROL_CODE(0, METHOD_BUFFERED)
-#define TAP_IOCTL_GET_MAC TAP_CONTROL_CODE(1, METHOD_BUFFERED)
-#define TAP_IOCTL_SET_STATISTICS TAP_CONTROL_CODE(2, METHOD_BUFFERED)
+extern char *myport;
-/* FIXME: This only works for Windows 2000 */
-#define OSTYPE 5
+static DWORD WINAPI tapreader(void *bla) {
+ int status;
+ long len;
+ OVERLAPPED overlapped;
+ vpn_packet_t packet;
-HANDLE device_fd = INVALID_HANDLE_VALUE;
-char *device = NULL;
-char *iface = NULL;
-char *device_info = NULL;
+ logger(LOG_DEBUG, _("Tap reader running"));
+
+ /* Read from tap device and send to parent */
-int device_total_in = 0;
-int device_total_out = 0;
+ overlapped.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
+
+ for(;;) {
+ overlapped.Offset = 0;
+ overlapped.OffsetHigh = 0;
+ ResetEvent(overlapped.hEvent);
+
+ status = ReadFile(device_handle, packet.data, MTU, &len, &overlapped);
+
+ 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;
+ }
+ }
+
+ EnterCriticalSection(&mutex);
+ packet.len = len;
+ packet.priority = 0;
+ route(myself, &packet);
+ LeaveCriticalSection(&mutex);
+ }
+}
bool setup_device(void)
{
char adapterid[1024];
char adaptername[1024];
char tapname[1024];
- char gelukt = 0;
long len;
+ unsigned long status;
bool found = false;
+ int sock, err;
+ HANDLE thread;
+
+ struct addrinfo *ai;
+ struct addrinfo hint = {
+ .ai_family = AF_UNSPEC,
+ .ai_socktype = SOCK_STREAM,
+ .ai_protocol = IPPROTO_TCP,
+ .ai_flags = 0,
+ };
+
cp();
get_config_string(lookup_config(config_tree, "Device"), &device);
/* Open registry and look for network adapters */
- if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, REG_CONTROL_NET, 0, KEY_READ, &key)) {
- logger(LOG_ERR, _("Unable to read registry"));
+ if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, NETWORK_CONNECTIONS_KEY, 0, KEY_READ, &key)) {
+ logger(LOG_ERR, _("Unable to read registry: %s"), winerror(GetLastError()));
return false;
}
if(RegEnumKeyEx(key, i, adapterid, &len, 0, 0, 0, NULL))
break;
+ /* Find out more about this adapter */
+
+ snprintf(regpath, sizeof(regpath), "%s\\%s\\Connection", NETWORK_CONNECTIONS_KEY, adapterid);
+
+ if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, regpath, 0, KEY_READ, &key2))
+ continue;
+
+ len = sizeof(adaptername);
+ err = RegQueryValueEx(key2, "Name", 0, 0, adaptername, &len);
+
+ RegCloseKey(key2);
+
+ if(err)
+ continue;
+
if(device) {
if(!strcmp(device, adapterid)) {
found = true;
continue;
}
- /* Find out more about this adapter */
-
- snprintf(regpath, sizeof(regpath), "%s\\%s\\Connection", REG_CONTROL_NET, adapterid);
-
- if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, regpath, 0, KEY_READ, &key2)) {
- logger(LOG_ERR, _("Unable to read registry"));
- return false;
- }
-
- len = sizeof(adaptername);
- RegQueryValueEx(key2, "Name", 0, 0, adaptername, &len);
-
if(iface) {
if(!strcmp(iface, adaptername)) {
found = true;
}
snprintf(tapname, sizeof(tapname), USERMODEDEVICEDIR "%s" TAPSUFFIX, adapterid);
- device_fd = CreateFile(tapname, GENERIC_WRITE | GENERIC_READ, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM, 0);
- if(device_fd != INVALID_HANDLE_VALUE) {
+ 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) {
found = true;
break;
}
}
+ RegCloseKey(key);
+
if(!found) {
logger(LOG_ERR, _("No Windows tap device found!"));
return false;
}
- device = adapterid;
- iface = adaptername;
+ if(!device)
+ device = xstrdup(adapterid);
+
+ if(!iface)
+ iface = xstrdup(adaptername);
/* Try to open the corresponding tap device */
- if(device_fd == INVALID_HANDLE_VALUE) {
+ if(device_handle == INVALID_HANDLE_VALUE) {
snprintf(tapname, sizeof(tapname), USERMODEDEVICEDIR "%s" TAPSUFFIX, device);
- device_fd = CreateFile(tapname, GENERIC_WRITE | GENERIC_READ, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM, 0);
+ device_handle = CreateFile(tapname, GENERIC_WRITE | GENERIC_READ, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM | FILE_FLAG_OVERLAPPED, 0);
}
- if(device_fd == INVALID_HANDLE_VALUE) {
- logger(LOG_ERR, _("%s (%s) is no a usable Windows tap device!"), device, iface);
+ if(device_handle == INVALID_HANDLE_VALUE) {
+ logger(LOG_ERR, _("%s (%s) is not a usable Windows tap device: %s"), device, iface, winerror(GetLastError()));
return false;
}
/* Get MAC address from tap device */
- if(DeviceIoControl(device_fd, TAP_IOCTL_GET_MAC, mymac.x, sizeof(mymac.x), mymac.x, sizeof(mymac.x), &len, 0)) {
- logger(LOG_ERR, _("Could not get MAC address from Windows tap device!"));
+ if(!DeviceIoControl(device_handle, TAP_IOCTL_GET_MAC, mymac.x, sizeof(mymac.x), mymac.x, sizeof(mymac.x), &len, 0)) {
+ logger(LOG_ERR, _("Could not get MAC address from Windows tap device %s (%s): %s"), device, iface, winerror(GetLastError()));
return false;
}
overwrite_mac = 1;
}
- if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
- iface = device;
+ /* Start the tap reader */
+
+ thread = CreateThread(NULL, 0, tapreader, NULL, 0, NULL);
+
+ if(!thread) {
+ logger(LOG_ERR, _("System call `%s' failed: %s"), "CreateThread", winerror(GetLastError()));
+ return false;
+ }
+
+ /* 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);
device_info = _("Windows tap device");
{
cp();
- CloseHandle(device_fd);
+ CloseHandle(device_handle);
+
+ free(device);
+ free(iface);
}
bool read_packet(vpn_packet_t *packet)
{
- int lenin;
-
- cp();
-
- if(!ReadFile(device_fd, packet->data, MTU, &lenin, NULL)) {
- logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
- device, strerror(errno));
- return false;
- }
-
- packet->len = lenin;
-
- device_total_in += packet->len;
-
- ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Read packet of %d bytes from %s"), packet->len,
- device_info);
-
- return true;
+ return false;
}
bool write_packet(vpn_packet_t *packet)
{
- int lenout;
+ long lenout;
+ OVERLAPPED overlapped = {0};
cp();
ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
packet->len, device_info);
- if(!WriteFile(device_fd, packet->data, packet->len, &lenout, NULL)) {
- logger(LOG_ERR, "Error while writing to %s %s", device_info, device);
+ if(!WriteFile(device_handle, packet->data, packet->len, &lenout, &overlapped)) {
+ logger(LOG_ERR, _("Error while writing to %s %s: %s"), device_info, device, winerror(GetLastError()));
return false;
}
projects / tinc / blobdiff