X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fmingw%2Fdevice.c;h=00b57abfd392d094e3376992d57a0000cc4c9182;hp=4a962fe47808763f62bb87325f6a395e01302103;hb=7926a156e5b118d06295228e57de0cc9de0433b4;hpb=c15e8a96bf7e45adf750b7a36b0e8446ea049468 diff --git a/src/mingw/device.c b/src/mingw/device.c index 4a962fe4..00b57abf 100644 --- a/src/mingw/device.c +++ b/src/mingw/device.c @@ -1,7 +1,7 @@ /* - device.c -- Interaction with CIPE driver in a MinGW environment - Copyright (C) 2002-2003 Ivo Timmermans , - 2002-2003 Guus Sliepen + device.c -- Interaction with Windows tap driver in a MinGW environment + Copyright (C) 2002-2004 Ivo Timmermans , + 2002-2004 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 @@ -17,7 +17,7 @@ along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - $Id: device.c,v 1.1.2.3 2003/07/28 21:54:03 guus Exp $ + $Id$ */ #include "system.h" @@ -32,26 +32,26 @@ #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) +#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) +#define TAP_IOCTL_GET_VERSION TAP_CONTROL_CODE(3, METHOD_BUFFERED) +#define TAP_IOCTL_GET_MTU TAP_CONTROL_CODE(4, METHOD_BUFFERED) +#define TAP_IOCTL_GET_INFO TAP_CONTROL_CODE(5, METHOD_BUFFERED) +#define TAP_IOCTL_CONFIG_POINT_TO_POINT TAP_CONTROL_CODE(6, METHOD_BUFFERED) +#define TAP_IOCTL_SET_MEDIA_STATUS TAP_CONTROL_CODE(7, METHOD_BUFFERED) -/* FIXME: This only works for Windows 2000 */ -#define OSTYPE 5 -HANDLE device_fd = INVALID_HANDLE_VALUE; +int device_fd = 0; +HANDLE device_handle = INVALID_HANDLE_VALUE; char *device = NULL; char *iface = NULL; char *device_info = NULL; @@ -59,6 +59,74 @@ char *device_info = NULL; int device_total_in = 0; int device_total_out = 0; +extern char *myport; + +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); + + 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")); + + /* Read from tap device and send to parent */ + + overlapped.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL); + + for(;;) { + overlapped.Offset = 0; + overlapped.OffsetHigh = 0; + ResetEvent(overlapped.hEvent); + + status = ReadFile(device_handle, buf, sizeof(buf), &len, &overlapped); + + if(!status) { + if(GetLastError() == ERROR_IO_PENDING) { + WaitForSingleObject(overlapped.hEvent, INFINITE); + if(!GetOverlappedResult(device_handle, &overlapped, &len, FALSE)) + continue; + } else { + logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info, + device, strerror(errno)); + return -1; + } + } + + if(send(sock, buf, len, 0) <= 0) + return -1; + } +} + bool setup_device(void) { HKEY key, key2; @@ -68,11 +136,22 @@ bool setup_device(void) char adapterid[1024]; char adaptername[1024]; char tapname[1024]; - char gelukt = 0; long len; + unsigned long status; bool found = false; + int sock, 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); @@ -81,7 +160,7 @@ bool setup_device(void) /* 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")); + logger(LOG_ERR, _("Unable to read registry: %s"), winerror(GetLastError())); return false; } @@ -90,6 +169,21 @@ bool setup_device(void) 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); + + if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, regpath, 0, KEY_READ, &key2)) + continue; + + len = sizeof(adaptername); + err = RegQueryValueEx(key2, "Name", 0, 0, adaptername, &len); + + RegCloseKey(key2); + + if(err) + continue; + if(device) { if(!strcmp(device, adapterid)) { found = true; @@ -98,18 +192,6 @@ bool setup_device(void) continue; } - /* Find out more about this adapter */ - - snprintf(regpath, sizeof(regpath), "%s\\%s\\Connection", REG_CONTROL_NET, adapterid); - - if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, regpath, 0, KEY_READ, &key2)) { - logger(LOG_ERR, _("Unable to read registry")); - return false; - } - - len = sizeof(adaptername); - RegQueryValueEx(key2, "Name", 0, 0, adaptername, &len); - if(iface) { if(!strcmp(iface, adaptername)) { found = true; @@ -119,37 +201,42 @@ 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!")); 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; } @@ -157,8 +244,56 @@ bool setup_device(void) overwrite_mac = 1; } - if(!get_config_string(lookup_config(config_tree, "Interface"), &iface)) - iface = device; + /* 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, 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; + } + + /* 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())); + 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"); @@ -171,7 +306,7 @@ void close_device(void) { cp(); - CloseHandle(device_fd); + CloseHandle(device_handle); } bool read_packet(vpn_packet_t *packet) @@ -180,7 +315,7 @@ bool read_packet(vpn_packet_t *packet) cp(); - if(!ReadFile(device_fd, packet->data, MTU, &lenin, NULL)) { + 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; @@ -198,15 +333,16 @@ bool read_packet(vpn_packet_t *packet) bool write_packet(vpn_packet_t *packet) { - int lenout; + long lenout; + OVERLAPPED overlapped = {0}; cp(); 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); + 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; }