X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fmingw%2Fdevice.c;h=b77282ad9c1771814be74a7ffaea47a47359ed9c;hp=d005a63b1faae1faeeb841600c899a1832a62ed7;hb=2f03a5d;hpb=586f15ed20682413d1bddbb4518dd2714c96b255 diff --git a/src/mingw/device.c b/src/mingw/device.c index d005a63b..b77282ad 100644 --- a/src/mingw/device.c +++ b/src/mingw/device.c @@ -1,7 +1,7 @@ /* device.c -- Interaction with Windows tap driver in a MinGW environment - Copyright (C) 2002-2003 Ivo Timmermans , - 2002-2003 Guus Sliepen + Copyright (C) 2002-2005 Ivo Timmermans, + 2002-2014 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 @@ -13,54 +13,88 @@ 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 1.1.2.5 2003/07/29 12:38:49 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 #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) - -#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) +#include "../conf.h" +#include "../device.h" +#include "../logger.h" +#include "../net.h" +#include "../route.h" +#include "../utils.h" +#include "../xalloc.h" -/* FIXME: This only works for Windows 2000 */ -#define OSTYPE 5 +#include "common.h" -HANDLE device_fd = INVALID_HANDLE_VALUE; +int device_fd = -1; +static HANDLE device_handle = INVALID_HANDLE_VALUE; char *device = NULL; char *iface = NULL; -char *device_info = NULL; +static char *device_info = NULL; + +static uint64_t device_total_in = 0; +static uint64_t device_total_out = 0; + +extern char *myport; +OVERLAPPED r_overlapped; +OVERLAPPED w_overlapped; + +static DWORD WINAPI tapreader(void *bla) { + int status; + DWORD len; + vpn_packet_t packet; + int errors = 0; + + logger(LOG_DEBUG, "Tap reader running"); + + /* Read from tap device and send to parent */ + + r_overlapped.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL); + + for(;;) { + ResetEvent(r_overlapped.hEvent); + + status = ReadFile(device_handle, packet.data, MTU, &len, &r_overlapped); + + if(!status) { + if(GetLastError() == ERROR_IO_PENDING) { + WaitForSingleObject(r_overlapped.hEvent, INFINITE); + if(!GetOverlappedResult(device_handle, &r_overlapped, &len, FALSE)) + continue; + } else { + logger(LOG_ERR, "Error while reading from %s %s: %s", device_info, + device, strerror(errno)); + errors++; + if(errors >= 10) { + EnterCriticalSection(&mutex); + running = false; + LeaveCriticalSection(&mutex); + } + usleep(1000000); + continue; + } + } + + errors = 0; + packet.len = len; + packet.priority = 0; + + EnterCriticalSection(&mutex); + route(myself, &packet); + LeaveCriticalSection(&mutex); + } -int device_total_in = 0; -int device_total_out = 0; + return 0; +} -bool setup_device(void) -{ +static bool setup_device(void) { HKEY key, key2; int i; @@ -68,20 +102,24 @@ bool setup_device(void) char adapterid[1024]; char adaptername[1024]; char tapname[1024]; - char gelukt = 0; - long len; + DWORD len; + unsigned long status; bool found = false; - cp(); + int err; + HANDLE thread; get_config_string(lookup_config(config_tree, "Device"), &device); get_config_string(lookup_config(config_tree, "Interface"), &iface); + if(device && interface) + 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; } @@ -92,13 +130,18 @@ bool setup_device(void) /* 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)) continue; len = sizeof(adaptername); - RegQueryValueEx(key2, "Name", 0, 0, adaptername, &len); + err = RegQueryValueEx(key2, "Name", 0, 0, (LPBYTE)adaptername, &len); + + RegCloseKey(key2); + + if(err) + continue; if(device) { if(!strcmp(device, adapterid)) { @@ -117,37 +160,42 @@ bool setup_device(void) } 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!")); + 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; } @@ -155,54 +203,87 @@ bool setup_device(void) overwrite_mac = 1; } - device_info = _("Windows tap device"); + /* Create overlapped events for tap I/O */ - logger(LOG_INFO, _("%s (%s) is a %s"), device, iface, device_info); + r_overlapped.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL); + w_overlapped.hEvent = CreateEvent(NULL, TRUE, TRUE, NULL); - return true; -} + /* Start the tap reader */ -void close_device(void) -{ - cp(); + thread = CreateThread(NULL, 0, tapreader, NULL, 0, NULL); - CloseHandle(device_fd); -} - -bool read_packet(vpn_packet_t *packet) -{ - long 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)); + if(!thread) { + logger(LOG_ERR, "System call `%s' failed: %s", "CreateThread", winerror(GetLastError())); return false; } - - packet->len = lenin; - device_total_in += packet->len; + /* 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); - ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Read packet of %d bytes from %s"), packet->len, - device_info); + device_info = "Windows tap device"; + + logger(LOG_INFO, "%s (%s) is a %s", device, iface, device_info); return true; } -bool write_packet(vpn_packet_t *packet) -{ - long lenout; +static void close_device(void) { + CloseHandle(device_handle); + + free(device); + free(iface); +} + +static bool read_packet(vpn_packet_t *packet) { + return false; +} - cp(); +static bool write_packet(vpn_packet_t *packet) { + DWORD lenout; + static vpn_packet_t queue; - ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"), + 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); - return false; + /* Check if there is something in progress */ + + if(queue.len) { + DWORD size; + BOOL success = GetOverlappedResult(device_handle, &w_overlapped, &size, FALSE); + if(success) { + ResetEvent(&w_overlapped); + queue.len = 0; + } else { + int err = GetLastError(); + if(err != ERROR_IO_INCOMPLETE) { + ifdebug(TRAFFIC) logger(LOG_DEBUG, "Error completing previously queued write: %s", winerror(err)); + ResetEvent(&w_overlapped); + queue.len = 0; + } else { + ifdebug(TRAFFIC) logger(LOG_DEBUG, "Previous overlapped write still in progress"); + // drop this packet + return true; + } + } + } + + /* Otherwise, try to write. */ + + memcpy(queue.data, packet->data, packet->len); + + if(!WriteFile(device_handle, queue.data, packet->len, &lenout, &w_overlapped)) { + int err = GetLastError(); + if(err != ERROR_IO_PENDING) { + logger(LOG_ERR, "Error while writing to %s %s: %s", device_info, device, winerror(err)); + return false; + } + // Write is being done asynchronously. + queue.len = packet->len; + } else { + // Write was completed immediately. + ResetEvent(&w_overlapped); } device_total_out += packet->len; @@ -210,11 +291,16 @@ 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, +};