X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fmingw%2Fdevice.c;h=b77282ad9c1771814be74a7ffaea47a47359ed9c;hp=0ae0cf2713a84af3c88bce6bf892fe89b43e0230;hb=2f03a5d94c0bb6732fd65263217e3aa2b72f18ff;hpb=5193a14ddea4c20ffc708dc629a2f91f1e4ccea3 diff --git a/src/mingw/device.c b/src/mingw/device.c index 0ae0cf27..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 @@ -13,116 +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 1.1.2.11 2003/08/03 21:45:41 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 REG_CONTROL_NET "SYSTEM\\CurrentControlSet\\Control\\Network\\{4D36E972-E325-11CE-BFC1-08002BE10318}" - -#define USERMODEDEVICEDIR "\\\\.\\" -#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 "../net.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) +#include "common.h" -int device_fd = 0; -HANDLE device_handle = 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; -int device_total_in = 0; -int device_total_out = 0; +static uint64_t device_total_in = 0; +static uint64_t device_total_out = 0; extern char *myport; +OVERLAPPED r_overlapped; +OVERLAPPED w_overlapped; -DWORD WINAPI tapreader(void *bla) { - int sock, err, status; - struct addrinfo *ai; - struct addrinfo hint = { - .ai_family = AF_UNSPEC, - .ai_socktype = SOCK_DGRAM, - .ai_protocol = IPPROTO_UDP, - .ai_flags = 0, - }; - char buf[MTU]; - long len; - OVERLAPPED overlapped; - - /* Open a socket to the parent process */ - - err = getaddrinfo(NULL, myport, &hint, &ai); - - if(err || !ai) { - logger(LOG_ERR, _("System call `%s' failed: %s"), "getaddrinfo", gai_strerror(errno)); - return -1; - } - - sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol); +static DWORD WINAPI tapreader(void *bla) { + int status; + DWORD len; + vpn_packet_t packet; + int errors = 0; - freeaddrinfo(ai); - - if(sock < 0) { - logger(LOG_ERR, _("System call `%s' failed: %s"), "socket", strerror(errno)); - return -1; - } - - if(connect(sock, ai->ai_addr, ai->ai_addrlen)) { - logger(LOG_ERR, _("System call `%s' failed: %s"), "connect", strerror(errno)); - return -1; - } - - logger(LOG_DEBUG, _("Tap reader running")); + logger(LOG_DEBUG, "Tap reader running"); /* Read from tap device and send to parent */ - overlapped.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL); - + r_overlapped.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL); + for(;;) { - overlapped.Offset = 0; - overlapped.OffsetHigh = 0; - ResetEvent(overlapped.hEvent); + ResetEvent(r_overlapped.hEvent); - status = ReadFile(device_handle, buf, sizeof(buf), &len, &overlapped); + status = ReadFile(device_handle, packet.data, MTU, &len, &r_overlapped); if(!status) { if(GetLastError() == ERROR_IO_PENDING) { - WaitForSingleObject(overlapped.hEvent, INFINITE); - if(!GetOverlappedResult(device_handle, &overlapped, &len, FALSE)) + 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, + logger(LOG_ERR, "Error while reading from %s %s: %s", device_info, device, strerror(errno)); - return -1; + errors++; + if(errors >= 10) { + EnterCriticalSection(&mutex); + running = false; + LeaveCriticalSection(&mutex); + } + usleep(1000000); + continue; } } - if(send(sock, buf, len, 0) <= 0) - return -1; + errors = 0; + packet.len = len; + packet.priority = 0; + + EnterCriticalSection(&mutex); + route(myself, &packet); + LeaveCriticalSection(&mutex); } + + return 0; } -bool setup_device(void) -{ +static bool setup_device(void) { HKEY key, key2; int i; @@ -130,30 +102,24 @@ bool setup_device(void) char adapterid[1024]; char adaptername[1024]; char tapname[1024]; - long len; + DWORD len; + unsigned long status; bool found = false; - int sock, err; + int err; HANDLE thread; - struct addrinfo *ai; - struct addrinfo hint = { - .ai_family = AF_UNSPEC, - .ai_socktype = SOCK_DGRAM, - .ai_protocol = IPPROTO_UDP, - .ai_flags = 0, - }; - - cp(); - 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: %s"), winerror(GetLastError())); + if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, NETWORK_CONNECTIONS_KEY, 0, KEY_READ, &key)) { + logger(LOG_ERR, "Unable to read registry: %s", winerror(GetLastError())); return false; } @@ -164,16 +130,19 @@ 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)) { found = true; @@ -201,7 +170,7 @@ 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; } @@ -219,14 +188,14 @@ bool setup_device(void) } if(device_handle == INVALID_HANDLE_VALUE) { - logger(LOG_ERR, _("%s (%s) is no a usable Windows tap device!"), device, iface); + 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_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!")); + logger(LOG_ERR, "Could not get MAC address from Windows tap device %s (%s): %s", device, iface, winerror(GetLastError())); return false; } @@ -234,101 +203,87 @@ bool setup_device(void) overwrite_mac = 1; } - /* Create a listening socket */ + /* Create overlapped events for tap I/O */ - err = getaddrinfo(NULL, myport, &hint, &ai); - - if(err || !ai) { - logger(LOG_ERR, _("System call `%s' failed: %s"), "getaddrinfo", gai_strerror(errno)); - return false; - } - - sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol); - - if(sock < 0) { - logger(LOG_ERR, _("System call `%s' failed: %s"), "socket", strerror(errno)); - return false; - } - - if(bind(sock, ai->ai_addr, ai->ai_addrlen)) { - logger(LOG_ERR, _("System call `%s' failed: %s"), "bind", strerror(errno)); - return false; - } - - freeaddrinfo(ai); - - if(listen(sock, 1)) { - logger(LOG_ERR, _("System call `%s' failed: %s"), "listen", strerror(errno)); - return false; - } + r_overlapped.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL); + w_overlapped.hEvent = CreateEvent(NULL, TRUE, TRUE, NULL); /* Start the tap reader */ thread = CreateThread(NULL, 0, tapreader, NULL, 0, NULL); if(!thread) { - logger(LOG_ERR, _("System call `%s' failed: %s"), "CreateThread", winerror(GetLastError())); + logger(LOG_ERR, "System call `%s' failed: %s", "CreateThread", winerror(GetLastError())); return false; } - /* Wait for the tap reader to connect back to us */ - - if((device_fd = accept(sock, NULL, 0)) == -1) { - logger(LOG_ERR, _("System call `%s' failed: %s"), "accept", strerror(errno)); - return false; - } + /* Set media status for newer TAP-Win32 devices */ - closesocket(sock); + status = true; + DeviceIoControl(device_handle, TAP_IOCTL_SET_MEDIA_STATUS, &status, sizeof(status), &status, sizeof(status), &len, NULL); - 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) { CloseHandle(device_handle); -} - -bool read_packet(vpn_packet_t *packet) -{ - int lenin; - - cp(); - if((lenin = recv(device_fd, packet->data, MTU, 0)) <= 0) { - logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info, - device, strerror(errno)); - return false; - } - - packet->len = lenin; + free(device); + free(iface); +} - device_total_in += packet->len; +static bool read_packet(vpn_packet_t *packet) { + return false; +} - ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Read packet of %d bytes from %s"), packet->len, - device_info); +static bool write_packet(vpn_packet_t *packet) { + DWORD lenout; + static vpn_packet_t queue; - return true; -} + ifdebug(TRAFFIC) logger(LOG_DEBUG, "Writing packet of %d bytes to %s", + packet->len, device_info); -bool write_packet(vpn_packet_t *packet) -{ - long lenout; - OVERLAPPED overlapped = {0}; + /* 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; + } + } + } - cp(); + /* Otherwise, try to write. */ - ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"), - packet->len, device_info); + memcpy(queue.data, packet->data, packet->len); - if(!WriteFile(device_handle, packet->data, packet->len, &lenout, &overlapped)) { - logger(LOG_ERR, _("Error while writing to %s %s: %s"), device_info, device, winerror(GetLastError())); - return false; + 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; @@ -336,11 +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, +};