From 4c52febc57f2e34f5a187f0e57782903fe1eb95e Mon Sep 17 00:00:00 2001 From: Guus Sliepen Date: Tue, 15 Jul 2003 16:27:39 +0000 Subject: [PATCH] Make use of the CIPE driver. Woohoo, tinc for Windows! --- src/cygwin/device.c | 440 +++++++++++++++++++++++++++++++------------- 1 file changed, 313 insertions(+), 127 deletions(-) diff --git a/src/cygwin/device.c b/src/cygwin/device.c index 19ca204c..39efbb0c 100644 --- a/src/cygwin/device.c +++ b/src/cygwin/device.c @@ -1,127 +1,313 @@ -/* - device.c -- Stub for Cygwin environment - Copyright (C) 2002-2003 Ivo Timmermans , - 2002-2003 Guus Sliepen - - 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 -#include -#include -#include -#include -#include -#include - -#include -#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); -} +/* + device.c -- Interaction with CIPE driver in a Cygwin environment + Copyright (C) 2002-2003 Ivo Timmermans , + 2002-2003 Guus Sliepen + + 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 1.1.2.8 2003/07/15 16:27:39 guus Exp $ +*/ + +#include "config.h" + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +// #include +#include "conf.h" +#include "net.h" +#include "logger.h" +#include "route.h" + +#include "system.h" + +/* Definitions from CIPE */ + +#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 USERMODEDEVICEDIR "\\\\.\\" +#define SYSDEVICEDIR "\\Device\\" +#define USERDEVICEDIR "\\??\\" +#define TAPSUFFIX ".tap" + +#define PRODUCT_STRING "DKW Heavy Industries VPN Adapter." +#define CIPE_SERVICE_NAME "CIPE_Daemon" +#define CIPE_DRIVER_NAME "CIPE" + +#define CIPE_NDIS_MAJOR_VERSION 4 +#define CIPE_NDIS_MINOR_VERSION 0 + +#ifndef CIPE_DRIVER_MAJOR_VERSION +# define CIPE_DRIVER_MAJOR_VERSION 2 +#endif + +#ifndef CIPE_DRIVER_MINOR_VERSION +# define CIPE_DRIVER_MINOR_VERSION 1 +#endif + +#ifndef CIPE_MAC_ROOT_ADDRESS +# define CIPE_MAC_ROOT_ADDRESS "8:0:58:0:0:1" +#endif + +#define CIPE_CONTROL_CODE(request,method) CTL_CODE (FILE_DEVICE_PHYSICAL_NETCARD | 8000, request, method, FILE_ANY_ACCESS) + +#define CIPE_IOCTL_GET_LASTMAC CIPE_CONTROL_CODE (0, METHOD_BUFFERED) +#define CIPE_IOCTL_GET_MAC CIPE_CONTROL_CODE (1, METHOD_BUFFERED) +#define CIPE_IOCTL_SET_STATISTICS CIPE_CONTROL_CODE (2, METHOD_BUFFERED) + +/* Windows 2000 */ +#define OSTYPE 5 + +int device_fd = -1; +char *device = NULL; +char *iface = NULL; +char *device_info = NULL; + +int device_total_in = 0; +int device_total_out = 0; + +HANDLE handle; + +pid_t reader_pid; +int sp[2]; + +int setup_device(void) +{ + HKEY key, key2, adapterkey; + int i; + + char adapterid[1024]; + char manufacturer[1024]; + char productname[1024]; + char adaptername[1024]; + char tapname[1024]; + char gelukt = 0; + long len; + + FILETIME filetime; + bool found = false; + + cp(); + + get_config_string(lookup_config(config_tree, "Device"), &device); + + /* Open registry and look for network adapters */ + + if (RegOpenKeyEx (HKEY_LOCAL_MACHINE, (OSTYPE > 4 ? NETCARD_REG_KEY_2000 : NETCARD_REG_KEY), 0, KEY_READ, &key)) { + logger(LOG_ERR, _("Unable to read registry")); + return -1; + } + + for (i = 0; ; i++) { + len = sizeof(adapterid); + if(RegEnumKeyEx (key, i, adapterid, &len, 0, 0, 0, &filetime)) + break; + + /* Find out more about this adapter */ + + if(RegOpenKeyEx (key, adapterid, 0, KEY_READ, &adapterkey)) { + logger(LOG_ERR, _("Unable to read registry")); + return -1; + } + + len = sizeof(productname); + if(RegQueryValueEx(adapterkey, "ProductName", 0, 0, productname, &len)) + goto skip; + + len = sizeof(manufacturer); + if(RegQueryValueEx(adapterkey, "Manufacturer", 0, 0, manufacturer, &len)) + goto skip; + + if(!strcmp(productname, "CIPE") && !strcmp(manufacturer, "DKWHeavyIndustries")) { + if(device && strcmp(adapterid, device)) + continue; + if(!device) + device = xstrdup(adapterid); + found = true; + break; + } + +skip: + RegCloseKey (adapterkey); + } + + if(!found) { + logger(LOG_ERR, _("No CIPE adapters found!")); + return -1; + } + + /* Get adapter name */ + + len = sizeof(adaptername); + RegQueryValueEx(adapterkey, (OSTYPE > 4 ? "NetCfgInstanceId" : "ServiceName"), 0, 0, adaptername, &len); + + /* FIXME? cipsrvr checks if the device is in use at this point */ + + /* Try to open the corresponding tap device */ + + snprintf(tapname, sizeof(tapname), USERMODEDEVICEDIR "%s" TAPSUFFIX, adaptername); + + /* Now we are going to open this device twice: once for reading and once for writing. + We do this because apparently it isn't possible to check for activity in the select() loop. + Furthermore I don't really know how to do it the "Windows" way. */ + + if(socketpair(AF_UNIX, SOCK_DGRAM, PF_UNIX, sp)) { + logger(LOG_DEBUG, _("System call `%s' failed: %s"), "socketpair", strerror(errno)); + return -1; + } + + reader_pid = fork(); + + if(reader_pid == -1) { + logger(LOG_DEBUG, _("System call `%s' failed: %s"), "fork", strerror(errno)); + return -1; + } + + if(!reader_pid) { + /* The child opens the tap device for reading, blocking. + It passes everything it reads to the socket. */ + + char buf[MTU]; + int lenin; + + handle = CreateFile(tapname, GENERIC_READ, FILE_SHARE_WRITE, 0, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM , 0); + + if(handle == INVALID_HANDLE_VALUE) { + logger(LOG_ERR, _("Could not open CIPE tap device for reading!")); + buf[0] = 0; + write(sp[1], buf, 1); + exit(1); + } + + logger(LOG_DEBUG, _("Tap reader forked and running.")); + + /* Notify success */ + + buf[0] = 1; + write(sp[1], buf, 1); + + /* Pass packets */ + + for(;;) { + ReadFile (handle, buf, MTU, &lenin, NULL); + write(sp[1], buf, lenin); + } + } + + /* The parent opens the tap device for writing. */ + + handle = CreateFile(tapname, GENERIC_WRITE, FILE_SHARE_READ, 0, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM , 0); + + if(handle == INVALID_HANDLE_VALUE) { + logger(LOG_ERR, _("Could not open CIPE tap device for writing!")); + return -1; + } + + device_fd = sp[0]; + + /* Get MAC address from tap device */ + + if(routing_mode == RMODE_ROUTER) { + DeviceIoControl (handle, CIPE_IOCTL_GET_MAC, mymac.x, sizeof(mymac.x), mymac.x, sizeof(mymac.x), &len, 0); + overwrite_mac = 1; + } + + read(device_fd, &gelukt, 1); + if(gelukt != 1) { + logger(LOG_DEBUG, "Tap reader failed!"); + return -1; + } + + if(!get_config_string(lookup_config(config_tree, "Interface"), &iface)) + iface = device; + + device_info = _("Cygwin CIPE device"); + + logger(LOG_INFO, _("%s is a %s"), device, device_info); + + return 0; +} + +void close_device(void) +{ + cp(); + + close(sp[0]); + close(sp[1]); + CloseHandle(handle); + + kill(reader_pid, SIGKILL); +} + +int read_packet(vpn_packet_t *packet) +{ + int lenin; + + cp(); + + if((lenin = read(sp[0], 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) +{ + int lenout; + + cp(); + + ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"), + packet->len, device_info); + + if(!WriteFile (handle, packet->data, packet->len, &lenout, NULL)) { + logger(LOG_ERR, "Error while writing to %s %s", device_info, device); + 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); +} -- 2.39.5