2 device.c -- Interaction with CIPE driver in a Cygwin environment
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3 Copyright (C) 2002-2003 Ivo Timmermans <ivo@o2w.nl>,
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4 2002-2003 Guus Sliepen <guus@sliepen.eu.org>
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6 This program is free software; you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 2 of the License, or
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9 (at your option) any later version.
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11 This program is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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16 You should have received a copy of the GNU General Public License
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17 along with this program; if not, write to the Free Software
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18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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20 $Id: device.c,v 1.1.2.8 2003/07/15 16:27:39 guus Exp $
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26 #include <stdbool.h>
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28 #include <sys/types.h>
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29 #include <sys/stat.h>
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34 #include <w32api/windows.h>
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35 #include <w32api/winioctl.h>
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37 // #include <utils.h>
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45 /* Definitions from CIPE */
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47 #define NETCARD_REG_KEY_2000 "SYSTEM\\CurrentControlSet\\Control\\Class\\{4D36E972-E325-11CE-BFC1-08002BE10318}"
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48 #define NETCARD_REG_KEY "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\NetworkCards"
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49 #define REG_SERVICE_KEY "SYSTEM\\CurrentControlSet\\Services"
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51 #define USERMODEDEVICEDIR "\\\\.\\"
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52 #define SYSDEVICEDIR "\\Device\\"
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53 #define USERDEVICEDIR "\\??\\"
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54 #define TAPSUFFIX ".tap"
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56 #define PRODUCT_STRING "DKW Heavy Industries VPN Adapter."
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57 #define CIPE_SERVICE_NAME "CIPE_Daemon"
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58 #define CIPE_DRIVER_NAME "CIPE"
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60 #define CIPE_NDIS_MAJOR_VERSION 4
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61 #define CIPE_NDIS_MINOR_VERSION 0
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63 #ifndef CIPE_DRIVER_MAJOR_VERSION
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64 # define CIPE_DRIVER_MAJOR_VERSION 2
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67 #ifndef CIPE_DRIVER_MINOR_VERSION
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68 # define CIPE_DRIVER_MINOR_VERSION 1
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71 #ifndef CIPE_MAC_ROOT_ADDRESS
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72 # define CIPE_MAC_ROOT_ADDRESS "8:0:58:0:0:1"
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75 #define CIPE_CONTROL_CODE(request,method) CTL_CODE (FILE_DEVICE_PHYSICAL_NETCARD | 8000, request, method, FILE_ANY_ACCESS)
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77 #define CIPE_IOCTL_GET_LASTMAC CIPE_CONTROL_CODE (0, METHOD_BUFFERED)
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78 #define CIPE_IOCTL_GET_MAC CIPE_CONTROL_CODE (1, METHOD_BUFFERED)
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79 #define CIPE_IOCTL_SET_STATISTICS CIPE_CONTROL_CODE (2, METHOD_BUFFERED)
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85 char *device = NULL;
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87 char *device_info = NULL;
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89 int device_total_in = 0;
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90 int device_total_out = 0;
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97 int setup_device(void)
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99 HKEY key, key2, adapterkey;
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102 char adapterid[1024];
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103 char manufacturer[1024];
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104 char productname[1024];
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105 char adaptername[1024];
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106 char tapname[1024];
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111 bool found = false;
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115 get_config_string(lookup_config(config_tree, "Device"), &device);
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117 /* Open registry and look for network adapters */
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119 if (RegOpenKeyEx (HKEY_LOCAL_MACHINE, (OSTYPE > 4 ? NETCARD_REG_KEY_2000 : NETCARD_REG_KEY), 0, KEY_READ, &key)) {
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120 logger(LOG_ERR, _("Unable to read registry"));
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124 for (i = 0; ; i++) {
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125 len = sizeof(adapterid);
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126 if(RegEnumKeyEx (key, i, adapterid, &len, 0, 0, 0, &filetime))
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129 /* Find out more about this adapter */
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131 if(RegOpenKeyEx (key, adapterid, 0, KEY_READ, &adapterkey)) {
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132 logger(LOG_ERR, _("Unable to read registry"));
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136 len = sizeof(productname);
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137 if(RegQueryValueEx(adapterkey, "ProductName", 0, 0, productname, &len))
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140 len = sizeof(manufacturer);
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141 if(RegQueryValueEx(adapterkey, "Manufacturer", 0, 0, manufacturer, &len))
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144 if(!strcmp(productname, "CIPE") && !strcmp(manufacturer, "DKWHeavyIndustries")) {
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145 if(device && strcmp(adapterid, device))
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148 device = xstrdup(adapterid);
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154 RegCloseKey (adapterkey);
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158 logger(LOG_ERR, _("No CIPE adapters found!"));
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162 /* Get adapter name */
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164 len = sizeof(adaptername);
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165 RegQueryValueEx(adapterkey, (OSTYPE > 4 ? "NetCfgInstanceId" : "ServiceName"), 0, 0, adaptername, &len);
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167 /* FIXME? cipsrvr checks if the device is in use at this point */
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169 /* Try to open the corresponding tap device */
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171 snprintf(tapname, sizeof(tapname), USERMODEDEVICEDIR "%s" TAPSUFFIX, adaptername);
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173 /* Now we are going to open this device twice: once for reading and once for writing.
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174 We do this because apparently it isn't possible to check for activity in the select() loop.
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175 Furthermore I don't really know how to do it the "Windows" way. */
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177 if(socketpair(AF_UNIX, SOCK_DGRAM, PF_UNIX, sp)) {
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178 logger(LOG_DEBUG, _("System call `%s' failed: %s"), "socketpair", strerror(errno));
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182 reader_pid = fork();
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184 if(reader_pid == -1) {
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185 logger(LOG_DEBUG, _("System call `%s' failed: %s"), "fork", strerror(errno));
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190 /* The child opens the tap device for reading, blocking.
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191 It passes everything it reads to the socket. */
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196 handle = CreateFile(tapname, GENERIC_READ, FILE_SHARE_WRITE, 0, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM , 0);
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198 if(handle == INVALID_HANDLE_VALUE) {
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199 logger(LOG_ERR, _("Could not open CIPE tap device for reading!"));
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201 write(sp[1], buf, 1);
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205 logger(LOG_DEBUG, _("Tap reader forked and running."));
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207 /* Notify success */
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210 write(sp[1], buf, 1);
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215 ReadFile (handle, buf, MTU, &lenin, NULL);
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216 write(sp[1], buf, lenin);
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220 /* The parent opens the tap device for writing. */
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222 handle = CreateFile(tapname, GENERIC_WRITE, FILE_SHARE_READ, 0, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM , 0);
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224 if(handle == INVALID_HANDLE_VALUE) {
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225 logger(LOG_ERR, _("Could not open CIPE tap device for writing!"));
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231 /* Get MAC address from tap device */
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233 if(routing_mode == RMODE_ROUTER) {
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234 DeviceIoControl (handle, CIPE_IOCTL_GET_MAC, mymac.x, sizeof(mymac.x), mymac.x, sizeof(mymac.x), &len, 0);
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238 read(device_fd, &gelukt, 1);
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240 logger(LOG_DEBUG, "Tap reader failed!");
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244 if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
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247 device_info = _("Cygwin CIPE device");
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249 logger(LOG_INFO, _("%s is a %s"), device, device_info);
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254 void close_device(void)
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260 CloseHandle(handle);
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262 kill(reader_pid, SIGKILL);
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265 int read_packet(vpn_packet_t *packet)
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271 if((lenin = read(sp[0], packet->data, MTU)) <= 0) {
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272 logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
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273 device, strerror(errno));
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277 packet->len = lenin;
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279 device_total_in += packet->len;
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281 ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Read packet of %d bytes from %s"), packet->len,
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287 int write_packet(vpn_packet_t *packet)
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293 ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
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294 packet->len, device_info);
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296 if(!WriteFile (handle, packet->data, packet->len, &lenout, NULL)) {
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297 logger(LOG_ERR, "Error while writing to %s %s", device_info, device);
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301 device_total_out += packet->len;
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306 void dump_device_stats(void)
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310 logger(LOG_DEBUG, _("Statistics for %s %s:"), device_info, device);
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311 logger(LOG_DEBUG, _(" total bytes in: %10d"), device_total_in);
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312 logger(LOG_DEBUG, _(" total bytes out: %10d"), device_total_out);
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