Make use of the CIPE driver. Woohoo, tinc for Windows!
authorGuus Sliepen <guus@tinc-vpn.org>
Tue, 15 Jul 2003 16:27:39 +0000 (16:27 +0000)
committerGuus Sliepen <guus@tinc-vpn.org>
Tue, 15 Jul 2003 16:27:39 +0000 (16:27 +0000)
src/cygwin/device.c

index 19ca204..39efbb0 100644 (file)
-/*
-    device.c -- Stub for Cygwin environment
-    Copyright (C) 2002-2003 Ivo Timmermans <ivo@o2w.nl>,
-                  2002-2003 Guus Sliepen <guus@sliepen.eu.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
-    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.
-
-    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 1.1.2.7 2003/07/12 17:41:47 guus Exp $
-*/
-
-#include "config.h"
-
-#include <stdio.h>
-#include <errno.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <string.h>
-
-#include <utils.h>
-#include "conf.h"
-#include "net.h"
-#include "logger.h"
-
-#include "system.h"
-
-int device_fd = -1;
-int device_type;
-char *device;
-char *interface;
-char *device_info;
-
-int device_total_in = 0;
-int device_total_out = 0;
-
-int setup_device(void)
-{
-       struct ifreq ifr;
-
-       cp();
-
-       if(!get_config_string(lookup_config(config_tree, "Device"), &device))
-               device = DEFAULT_DEVICE;
-
-       if(!get_config_string(lookup_config(config_tree, "Interface"), &interface))
-               interface = rindex(device, '/') ? rindex(device, '/') + 1 : device;
-
-       if((device_fd = open(device, O_RDWR | O_NONBLOCK)) < 0) {
-               logger(LOG_ERR, _("Could not open %s: %s"), device, strerror(errno));
-               return -1;
-       }
-
-       device_info = _("Stub device for Cygwin environment");
-
-       logger(LOG_INFO, _("%s is a %s"), device, device_info);
-
-       return 0;
-}
-
-void close_device(void)
-{
-       cp();
-
-       close(device_fd);
-}
-
-int read_packet(vpn_packet_t *packet)
-{
-       int lenin;
-
-       cp();
-
-       if((lenin = read(device_fd, packet->data, MTU)) <= 0) {
-               logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
-                          device, strerror(errno));
-               return -1;
-       }
-
-       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 0;
-}
-
-int write_packet(vpn_packet_t *packet)
-{
-       cp();
-
-       ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
-                          packet->len, device_info);
-
-       if(write(device_fd, packet->data, packet->len) < 0) {
-               logger(LOG_ERR, _("Can't write to %s %s: %s"), device_info, device,
-                          strerror(errno));
-               return -1;
-       }
-
-       device_total_out += packet->len;
-
-       return 0;
-}
-
-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);
-}
+/*\r
+    device.c -- Interaction with CIPE driver in a Cygwin environment\r
+    Copyright (C) 2002-2003 Ivo Timmermans <ivo@o2w.nl>,\r
+                  2002-2003 Guus Sliepen <guus@sliepen.eu.org>\r
+\r
+    This program is free software; you can redistribute it and/or modify\r
+    it under the terms of the GNU General Public License as published by\r
+    the Free Software Foundation; either version 2 of the License, or\r
+    (at your option) any later version.\r
+\r
+    This program is distributed in the hope that it will be useful,\r
+    but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
+    GNU General Public License for more details.\r
+\r
+    You should have received a copy of the GNU General Public License\r
+    along with this program; if not, write to the Free Software\r
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.\r
+\r
+    $Id: device.c,v 1.1.2.8 2003/07/15 16:27:39 guus Exp $\r
+*/\r
+\r
+#include "config.h"\r
+\r
+#include <stdio.h>\r
+#include <stdbool.h>\r
+#include <errno.h>\r
+#include <sys/types.h>\r
+#include <sys/stat.h>\r
+#include <signal.h>\r
+#include <fcntl.h>\r
+#include <unistd.h>\r
+#include <string.h>\r
+#include <w32api/windows.h>\r
+#include <w32api/winioctl.h>\r
+\r
+// #include <utils.h>\r
+#include "conf.h"\r
+#include "net.h"\r
+#include "logger.h"\r
+#include "route.h"\r
+\r
+#include "system.h"\r
+\r
+/* Definitions from CIPE */\r
+\r
+#define NETCARD_REG_KEY_2000 "SYSTEM\\CurrentControlSet\\Control\\Class\\{4D36E972-E325-11CE-BFC1-08002BE10318}"\r
+#define NETCARD_REG_KEY      "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\NetworkCards"\r
+#define REG_SERVICE_KEY      "SYSTEM\\CurrentControlSet\\Services"\r
+\r
+#define USERMODEDEVICEDIR "\\\\.\\"\r
+#define SYSDEVICEDIR  "\\Device\\"\r
+#define USERDEVICEDIR "\\??\\"\r
+#define TAPSUFFIX     ".tap"\r
+\r
+#define PRODUCT_STRING "DKW Heavy Industries VPN Adapter."\r
+#define CIPE_SERVICE_NAME "CIPE_Daemon"\r
+#define CIPE_DRIVER_NAME "CIPE"\r
+\r
+#define CIPE_NDIS_MAJOR_VERSION 4\r
+#define CIPE_NDIS_MINOR_VERSION 0\r
+\r
+#ifndef CIPE_DRIVER_MAJOR_VERSION\r
+#   define CIPE_DRIVER_MAJOR_VERSION 2\r
+#endif\r
+\r
+#ifndef CIPE_DRIVER_MINOR_VERSION\r
+#   define CIPE_DRIVER_MINOR_VERSION 1\r
+#endif\r
+\r
+#ifndef CIPE_MAC_ROOT_ADDRESS\r
+#   define CIPE_MAC_ROOT_ADDRESS "8:0:58:0:0:1"\r
+#endif\r
+\r
+#define CIPE_CONTROL_CODE(request,method) CTL_CODE (FILE_DEVICE_PHYSICAL_NETCARD | 8000, request, method, FILE_ANY_ACCESS)\r
+\r
+#define CIPE_IOCTL_GET_LASTMAC    CIPE_CONTROL_CODE (0, METHOD_BUFFERED)\r
+#define CIPE_IOCTL_GET_MAC        CIPE_CONTROL_CODE (1, METHOD_BUFFERED)\r
+#define CIPE_IOCTL_SET_STATISTICS CIPE_CONTROL_CODE (2, METHOD_BUFFERED)\r
+\r
+/* Windows 2000 */\r
+#define OSTYPE 5\r
+\r
+int device_fd = -1;\r
+char *device = NULL;\r
+char *iface = NULL;\r
+char *device_info = NULL;\r
+\r
+int device_total_in = 0;\r
+int device_total_out = 0;\r
+\r
+HANDLE handle;\r
+\r
+pid_t reader_pid;\r
+int sp[2];\r
+\r
+int setup_device(void)\r
+{\r
+       HKEY key, key2, adapterkey;\r
+       int i;\r
+\r
+       char adapterid[1024];\r
+       char manufacturer[1024];\r
+       char productname[1024];\r
+       char adaptername[1024];\r
+       char tapname[1024];\r
+       char gelukt = 0;\r
+       long len;\r
+\r
+       FILETIME filetime;\r
+       bool found = false;\r
+\r
+       cp();\r
+\r
+       get_config_string(lookup_config(config_tree, "Device"), &device);\r
+\r
+       /* Open registry and look for network adapters */\r
+\r
+       if (RegOpenKeyEx (HKEY_LOCAL_MACHINE, (OSTYPE > 4 ? NETCARD_REG_KEY_2000 : NETCARD_REG_KEY), 0, KEY_READ, &key)) {\r
+               logger(LOG_ERR, _("Unable to read registry"));\r
+               return -1;\r
+       }\r
+\r
+       for (i = 0; ; i++) {\r
+               len = sizeof(adapterid);\r
+               if(RegEnumKeyEx (key, i, adapterid, &len, 0, 0, 0, &filetime))\r
+                       break;\r
+\r
+               /* Find out more about this adapter */\r
+\r
+                if(RegOpenKeyEx (key, adapterid, 0, KEY_READ, &adapterkey)) {\r
+                       logger(LOG_ERR, _("Unable to read registry"));\r
+                       return -1;\r
+               }\r
+\r
+               len = sizeof(productname);\r
+               if(RegQueryValueEx(adapterkey, "ProductName", 0, 0, productname, &len))\r
+                       goto skip;\r
+\r
+               len = sizeof(manufacturer);\r
+               if(RegQueryValueEx(adapterkey, "Manufacturer", 0, 0, manufacturer, &len))\r
+                       goto skip;\r
+\r
+               if(!strcmp(productname, "CIPE") && !strcmp(manufacturer, "DKWHeavyIndustries")) {\r
+                       if(device && strcmp(adapterid, device))\r
+                               continue;\r
+                       if(!device)\r
+                               device = xstrdup(adapterid);\r
+                       found = true;\r
+                       break;\r
+               }\r
+               \r
+skip:\r
+                RegCloseKey (adapterkey);\r
+       }\r
+\r
+       if(!found) {\r
+               logger(LOG_ERR, _("No CIPE adapters found!"));\r
+               return -1;\r
+       }\r
+\r
+       /* Get adapter name */\r
+\r
+       len = sizeof(adaptername);\r
+       RegQueryValueEx(adapterkey, (OSTYPE > 4 ? "NetCfgInstanceId" : "ServiceName"), 0, 0, adaptername, &len);\r
+\r
+       /* FIXME? cipsrvr checks if the device is in use at this point */\r
+\r
+       /* Try to open the corresponding tap device */\r
+\r
+       snprintf(tapname, sizeof(tapname), USERMODEDEVICEDIR "%s" TAPSUFFIX, adaptername);\r
+       \r
+       /* Now we are going to open this device twice: once for reading and once for writing.\r
+          We do this because apparently it isn't possible to check for activity in the select() loop.\r
+          Furthermore I don't really know how to do it the "Windows" way. */\r
+\r
+       if(socketpair(AF_UNIX, SOCK_DGRAM, PF_UNIX, sp)) {\r
+               logger(LOG_DEBUG, _("System call `%s' failed: %s"), "socketpair", strerror(errno));\r
+               return -1;\r
+       }\r
+\r
+       reader_pid = fork();\r
+\r
+       if(reader_pid == -1) {\r
+               logger(LOG_DEBUG, _("System call `%s' failed: %s"), "fork", strerror(errno));\r
+               return -1;\r
+       }\r
+\r
+       if(!reader_pid) {\r
+               /* The child opens the tap device for reading, blocking.\r
+                  It passes everything it reads to the socket. */\r
+       \r
+               char buf[MTU];\r
+               int lenin;\r
+\r
+               handle = CreateFile(tapname, GENERIC_READ,  FILE_SHARE_WRITE,  0,  OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM , 0);\r
+\r
+               if(handle == INVALID_HANDLE_VALUE) {\r
+                       logger(LOG_ERR, _("Could not open CIPE tap device for reading!"));\r
+                       buf[0] = 0;\r
+                       write(sp[1], buf, 1);\r
+                       exit(1);\r
+               }\r
+\r
+               logger(LOG_DEBUG, _("Tap reader forked and running."));\r
+\r
+               /* Notify success */\r
+\r
+               buf[0] = 1;\r
+               write(sp[1], buf, 1);\r
+\r
+               /* Pass packets */\r
+\r
+               for(;;) {\r
+                       ReadFile (handle, buf, MTU, &lenin, NULL);\r
+                       write(sp[1], buf, lenin);\r
+               }\r
+       }\r
+\r
+       /* The parent opens the tap device for writing. */\r
+       \r
+       handle = CreateFile(tapname, GENERIC_WRITE,  FILE_SHARE_READ,  0,  OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM , 0);\r
+       \r
+       if(handle == INVALID_HANDLE_VALUE) {\r
+               logger(LOG_ERR, _("Could not open CIPE tap device for writing!"));\r
+               return -1;\r
+       }\r
+\r
+       device_fd = sp[0];\r
+\r
+       /* Get MAC address from tap device */\r
+\r
+       if(routing_mode == RMODE_ROUTER) {\r
+               DeviceIoControl (handle, CIPE_IOCTL_GET_MAC, mymac.x, sizeof(mymac.x), mymac.x, sizeof(mymac.x), &len, 0);\r
+               overwrite_mac = 1;\r
+       }\r
+\r
+       read(device_fd, &gelukt, 1);\r
+       if(gelukt != 1) {\r
+               logger(LOG_DEBUG, "Tap reader failed!");\r
+               return -1;\r
+       }\r
+\r
+       if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))\r
+               iface = device;\r
+\r
+       device_info = _("Cygwin CIPE device");\r
+\r
+       logger(LOG_INFO, _("%s is a %s"), device, device_info);\r
+\r
+       return 0;\r
+}\r
+\r
+void close_device(void)\r
+{\r
+       cp();\r
+\r
+       close(sp[0]);\r
+       close(sp[1]);\r
+       CloseHandle(handle);\r
+\r
+       kill(reader_pid, SIGKILL);\r
+}\r
+\r
+int read_packet(vpn_packet_t *packet)\r
+{\r
+       int lenin;\r
+\r
+       cp();\r
+\r
+       if((lenin = read(sp[0], packet->data, MTU)) <= 0) {\r
+               logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,\r
+                          device, strerror(errno));\r
+               return -1;\r
+       }\r
+       \r
+       packet->len = lenin;\r
+\r
+       device_total_in += packet->len;\r
+\r
+       ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Read packet of %d bytes from %s"), packet->len,\r
+                          device_info);\r
+\r
+       return 0;\r
+}\r
+\r
+int write_packet(vpn_packet_t *packet)\r
+{\r
+       int lenout;\r
+\r
+       cp();\r
+\r
+       ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"),\r
+                          packet->len, device_info);\r
+\r
+       if(!WriteFile (handle, packet->data, packet->len, &lenout, NULL)) {\r
+               logger(LOG_ERR, "Error while writing to %s %s", device_info, device);\r
+               return -1;\r
+       }\r
+\r
+       device_total_out += packet->len;\r
+\r
+       return 0;\r
+}\r
+\r
+void dump_device_stats(void)\r
+{\r
+       cp();\r
+\r
+       logger(LOG_DEBUG, _("Statistics for %s %s:"), device_info, device);\r
+       logger(LOG_DEBUG, _(" total bytes in:  %10d"), device_total_in);\r
+       logger(LOG_DEBUG, _(" total bytes out: %10d"), device_total_out);\r
+}\r