X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fcygwin%2Fdevice.c;h=3a242bfaa3c2f589d2d8e608b3e4fddc17ed2f4c;hp=f7db4c239f0428c5b2a86dc17b85f22d65d63709;hb=3fae14fae5a347823679ef694ab630b4991a201d;hpb=6f7cce69479f9b2796d81f458bf836287b74462e diff --git a/src/cygwin/device.c b/src/cygwin/device.c index f7db4c23..3a242bfa 100644 --- a/src/cygwin/device.c +++ b/src/cygwin/device.c @@ -1,7 +1,7 @@ /* device.c -- Interaction with Windows tap driver in a Cygwin environment - Copyright (C) 2002-2003 Ivo Timmermans , - 2002-2003 Guus Sliepen + Copyright (C) 2002-2005 Ivo Timmermans, + 2002-2016 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 @@ -13,61 +13,41 @@ 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 1.1.2.13 2003/07/29 12:18:35 guus Exp $ + 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. */ -#include "system.h" +#include "../system.h" +#include "../net.h" #include #include -#include "conf.h" -#include "logger.h" -#include "net.h" -#include "route.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}" - -#define USERMODEDEVICEDIR "\\\\.\\" -#define SYSDEVICEDIR "\\Device\\" -#define USERDEVICEDIR "\\??\\" -#define TAPSUFFIX ".tap" - -#define TAP_CONTROL_CODE(request,method) CTL_CODE(FILE_DEVICE_PHYSICAL_NETCARD | 8000, request, method, FILE_ANY_ACCESS) +#include "../conf.h" +#include "../device.h" +#include "../logger.h" +#include "../route.h" +#include "../utils.h" +#include "../xalloc.h" -#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) - -/* FIXME: This only works for Windows 2000 */ -#define OSTYPE 5 +#include "../mingw/common.h" int device_fd = -1; +static HANDLE device_handle = INVALID_HANDLE_VALUE; char *device = NULL; char *iface = NULL; -char *device_info = NULL; - -int device_total_in = 0; -int device_total_out = 0; +static char *device_info = NULL; -HANDLE handle; +static uint64_t device_total_in = 0; +static uint64_t device_total_out = 0; -pid_t reader_pid; -int sp[2]; +static pid_t reader_pid; +static int sp[2]; -bool setup_device(void) -{ +static bool setup_device(void) { HKEY key, key2; - int i; + int i, err; char regpath[1024]; char adapterid[1024]; @@ -78,55 +58,67 @@ bool setup_device(void) bool found = false; - cp(); - get_config_string(lookup_config(config_tree, "Device"), &device); get_config_string(lookup_config(config_tree, "Interface"), &iface); + if(device && iface) { + logger(LOG_WARNING, "Warning: both Device and Interface specified, results may not be as expected"); + } + /* 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; } - for (i = 0; ; i++) { + for(i = 0; ; i++) { len = sizeof(adapterid); - if(RegEnumKeyEx(key, i, adapterid, &len, 0, 0, 0, NULL)) + + if(RegEnumKeyEx(key, i, adapterid, &len, 0, 0, 0, NULL)) { break; + } /* Find out more about this adapter */ - snprintf(regpath, sizeof(regpath), "%s\\%s\\Connection", REG_CONTROL_NET, adapterid); + snprintf(regpath, sizeof(regpath), "%s\\%s\\Connection", NETWORK_CONNECTIONS_KEY, adapterid); - if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, regpath, 0, KEY_READ, &key2)) + if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, regpath, 0, KEY_READ, &key2)) { continue; + } len = sizeof(adaptername); - RegQueryValueEx(key2, "Name", 0, 0, adaptername, &len); + err = RegQueryValueEx(key2, "Name", 0, 0, adaptername, &len); RegCloseKey(key2); + if(err) { + continue; + } + if(device) { if(!strcmp(device, adapterid)) { found = true; break; - } else + } else { continue; + } } if(iface) { if(!strcmp(iface, adaptername)) { found = true; break; - } else + } else { continue; + } } snprintf(tapname, sizeof(tapname), USERMODEDEVICEDIR "%s" TAPSUFFIX, adapterid); - handle = CreateFile(tapname, GENERIC_WRITE | GENERIC_READ, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM, 0); - if(handle != INVALID_HANDLE_VALUE) { - CloseHandle(handle); + device_handle = CreateFile(tapname, GENERIC_WRITE | GENERIC_READ, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM, 0); + + if(device_handle != INVALID_HANDLE_VALUE) { + CloseHandle(device_handle); found = true; break; } @@ -135,30 +127,35 @@ bool setup_device(void) RegCloseKey(key); if(!found) { - logger(LOG_ERR, _("No Windows tap device 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); + } snprintf(tapname, sizeof(tapname), USERMODEDEVICEDIR "%s" TAPSUFFIX, device); - + /* 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)); + logger(LOG_DEBUG, "System call `%s' failed: %s", "socketpair", strerror(errno)); return false; } /* 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 Windows tap device for writing!")); + + device_handle = CreateFile(tapname, GENERIC_WRITE, FILE_SHARE_READ, 0, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM, 0); + + if(device_handle == INVALID_HANDLE_VALUE) { + logger(LOG_ERR, "Could not open Windows tap device %s (%s) for writing: %s", device, iface, winerror(GetLastError())); return false; } @@ -166,8 +163,8 @@ bool setup_device(void) /* Get MAC address from tap device */ - if(!DeviceIoControl(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!")); + 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; } @@ -180,29 +177,29 @@ bool setup_device(void) reader_pid = fork(); if(reader_pid == -1) { - logger(LOG_DEBUG, _("System call `%s' failed: %s"), "fork", strerror(errno)); + logger(LOG_DEBUG, "System call `%s' failed: %s", "fork", strerror(errno)); return false; } if(!reader_pid) { /* The child opens the tap device for reading, blocking. It passes everything it reads to the socket. */ - + char buf[MTU]; long lenin; - CloseHandle(handle); + CloseHandle(device_handle); - handle = CreateFile(tapname, GENERIC_READ, FILE_SHARE_WRITE, 0, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM, 0); + device_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 Windows tap device for reading!")); + if(device_handle == INVALID_HANDLE_VALUE) { + logger(LOG_ERR, "Could not open Windows tap device %s (%s) for reading: %s", device, iface, winerror(GetLastError())); buf[0] = 0; write(sp[1], buf, 1); exit(1); } - logger(LOG_DEBUG, _("Tap reader forked and running.")); + logger(LOG_DEBUG, "Tap reader forked and running."); /* Notify success */ @@ -212,68 +209,63 @@ bool setup_device(void) /* Pass packets */ for(;;) { - ReadFile(handle, buf, MTU, &lenin, NULL); + ReadFile(device_handle, buf, MTU, &lenin, NULL); write(sp[1], buf, lenin); } } read(device_fd, &gelukt, 1); + if(gelukt != 1) { - logger(LOG_DEBUG, _("Tap reader failed!")); + logger(LOG_DEBUG, "Tap reader failed!"); return false; } - device_info = _("Windows tap device"); + device_info = "Windows tap device"; - logger(LOG_INFO, _("%s (%s) is a %s"), device, iface, device_info); + logger(LOG_INFO, "%s (%s) is a %s", device, iface, device_info); return true; } -void close_device(void) -{ - cp(); - +static void close_device(void) { close(sp[0]); close(sp[1]); - CloseHandle(handle); + CloseHandle(device_handle); kill(reader_pid, SIGKILL); + + free(device); + free(iface); } -bool read_packet(vpn_packet_t *packet) -{ +static bool 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)); + 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); + ifdebug(TRAFFIC) logger(LOG_DEBUG, "Read packet of %d bytes from %s", packet->len, + device_info); return true; } -bool write_packet(vpn_packet_t *packet) -{ +static bool write_packet(vpn_packet_t *packet) { long lenout; - cp(); + ifdebug(TRAFFIC) logger(LOG_DEBUG, "Writing packet of %d bytes to %s", + packet->len, device_info); - 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); + if(!WriteFile(device_handle, packet->data, packet->len, &lenout, NULL)) { + logger(LOG_ERR, "Error while writing to %s %s: %s", device_info, device, winerror(GetLastError())); return false; } @@ -282,11 +274,16 @@ bool write_packet(vpn_packet_t *packet) 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); +static void dump_device_stats(void) { + logger(LOG_DEBUG, "Statistics for %s %s:", device_info, device); + logger(LOG_DEBUG, " total bytes in: %10"PRIu64, device_total_in); + logger(LOG_DEBUG, " total bytes out: %10"PRIu64, device_total_out); } + +const devops_t os_devops = { + .setup = setup_device, + .close = close_device, + .read = read_packet, + .write = write_packet, + .dump_stats = dump_device_stats, +};