X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fmingw%2Fdevice.c;h=321c51511d76a9d523399f5e95cd9b9e5822cdcf;hp=2813a8839cac9a9e45f01282cc4b1629596add27;hb=061c3fcaf9c63978009dc2707071f8daef8751b2;hpb=6af8900f8e1c7f2fe6a50a991ae6cbd0fd7edd43 diff --git a/src/mingw/device.c b/src/mingw/device.c index 2813a883..321c5151 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) 2002-2005 Ivo Timmermans, - 2002-2007 Guus Sliepen + 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 @@ -13,118 +13,92 @@ 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. - - $Id$ + 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" +#include "../conf.h" +#include "../device.h" +#include "../logger.h" +#include "../net.h" +#include "../route.h" +#include "../utils.h" +#include "../xalloc.h" -#include "mingw/common.h" +#include "common.h" -int device_fd = 0; +int device_fd = -1; static HANDLE device_handle = INVALID_HANDLE_VALUE; char *device = NULL; char *iface = NULL; -char *device_info = NULL; +static const char *device_info = "Windows tap device"; -static int device_total_in = 0; -static 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; -static struct packetbuf { - uint8_t data[MTU]; - length_t len; -} *bufs; - -static int nbufs = 64; - -DWORD WINAPI tapreader(void *bla) { - int sock, err, status; - struct addrinfo *ai; - struct addrinfo hint = { - .ai_family = AF_UNSPEC, - .ai_socktype = SOCK_STREAM, - .ai_protocol = IPPROTO_TCP, - .ai_flags = 0, - }; - unsigned char bufno = 0; - 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; - } +static DWORD WINAPI tapreader(void *bla) { + int status; + DWORD len; + vpn_packet_t packet; + int errors = 0; - sock = socket(ai->ai_family, SOCK_STREAM, IPPROTO_TCP); - - if(sock < 0) { - logger(LOG_ERR, _("System call `%s' failed: %s"), "socket", strerror(errno)); - freeaddrinfo(ai); - return -1; - } - - if(connect(sock, ai->ai_addr, ai->ai_addrlen)) { - logger(LOG_ERR, _("System call `%s' failed: %s"), "connect", strerror(errno)); - freeaddrinfo(ai); - return -1; - } - - freeaddrinfo(ai); - - 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, bufs[bufno].data, MTU, &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, - device, strerror(errno)); - return -1; + 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; } } - bufs[bufno].len = len; - if(send(sock, &bufno, 1, 0) <= 0) - return -1; - if(++bufno >= nbufs) - bufno = 0; + 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; @@ -132,72 +106,73 @@ 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_STREAM, - .ai_protocol = IPPROTO_TCP, - .ai_flags = 0, - }; - - 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, NETWORK_CONNECTIONS_KEY, 0, KEY_READ, &key)) { - logger(LOG_ERR, _("Unable to read registry: %s"), winerror(GetLastError())); + 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", 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); - err = RegQueryValueEx(key2, "Name", 0, 0, adaptername, &len); + err = RegQueryValueEx(key2, "Name", 0, 0, (LPBYTE)adaptername, &len); RegCloseKey(key2); - if(err) + 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); 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; @@ -207,15 +182,17 @@ 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; } - if(!device) + if(!device) { device = xstrdup(adapterid); + } - if(!iface) + if(!iface) { iface = xstrdup(adaptername); + } /* Try to open the corresponding tap device */ @@ -223,16 +200,16 @@ bool setup_device(void) snprintf(tapname, sizeof(tapname), USERMODEDEVICEDIR "%s" TAPSUFFIX, device); 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) { - logger(LOG_ERR, _("%s (%s) is not a usable Windows tap device: %s"), device, iface, winerror(GetLastError())); + 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 %s (%s): %s"), device, iface, winerror(GetLastError())); + logger(LOG_ERR, "Could not get MAC address from Windows tap device %s (%s): %s", device, iface, winerror(GetLastError())); return false; } @@ -240,117 +217,89 @@ bool setup_device(void) overwrite_mac = 1; } - /* Set up ringbuffer */ - - get_config_int(lookup_config(config_tree, "RingBufferSize"), &nbufs); - if(nbufs <= 1) - nbufs = 1; - else if(nbufs > 256) - nbufs = 256; - - bufs = xmalloc_and_zero(nbufs * sizeof *bufs); - - /* Create a listening socket */ - - 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, SOCK_STREAM, IPPROTO_TCP); - - 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); + /* Create overlapped events for tap I/O */ - 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; - } - - closesocket(sock); - /* 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); - 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); + + free(device); + free(iface); } -bool read_packet(vpn_packet_t *packet) -{ - unsigned char bufno; +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; - if((recv(device_fd, &bufno, 1, 0)) <= 0) { - logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info, - device, strerror(errno)); - return false; - } - - packet->len = bufs[bufno].len; - memcpy(packet->data, bufs[bufno].data, bufs[bufno].len); + ifdebug(TRAFFIC) logger(LOG_DEBUG, "Writing packet of %d bytes to %s", + packet->len, device_info); - device_total_in += packet->len; + /* Check if there is something in progress */ - ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Read packet of %d bytes from %s"), packet->len, - device_info); + if(queue.len) { + DWORD size; + BOOL success = GetOverlappedResult(device_handle, &w_overlapped, &size, FALSE); - return true; -} + if(success) { + ResetEvent(&w_overlapped); + queue.len = 0; + } else { + int err = GetLastError(); -bool write_packet(vpn_packet_t *packet) -{ - long lenout; - OVERLAPPED overlapped = {0}; + 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; @@ -358,11 +307,16 @@ 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, +};