X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fmingw%2Fdevice.c;h=004249ce49f82efc94b9bb0c775cdd7012184770;hp=e49ab9989fbe5aae3f1c9b538b2a40d63a49ef23;hb=03f3fc01e8d9402c4a14904fded883ff8cc574f6;hpb=ae50b0077e27c4c4d81a98da46c66865ffa069be diff --git a/src/mingw/device.c b/src/mingw/device.c index e49ab998..004249ce 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, + 2002-2006 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 1.1.2.4 2003/07/29 11:06:23 guus Exp $ + $Id$ */ #include "system.h" @@ -32,32 +32,94 @@ #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}" +#include "mingw/common.h" -#define USERMODEDEVICEDIR "\\\\.\\" -#define SYSDEVICEDIR "\\Device\\" -#define USERDEVICEDIR "\\??\\" -#define TAPSUFFIX ".tap" +int device_fd = 0; +static HANDLE device_handle = INVALID_HANDLE_VALUE; +char *device = NULL; +char *iface = NULL; +char *device_info = NULL; -#define TAP_CONTROL_CODE(request,method) CTL_CODE(FILE_DEVICE_PHYSICAL_NETCARD | 8000, request, method, FILE_ANY_ACCESS) +static int device_total_in = 0; +static int device_total_out = 0; -#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) +extern char *myport; -/* FIXME: This only works for Windows 2000 */ -#define OSTYPE 5 +static struct packetbuf { + uint8_t data[MTU]; + length_t len; +} *bufs; -HANDLE device_fd = INVALID_HANDLE_VALUE; -char *device = NULL; -char *iface = NULL; -char *device_info = NULL; +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; + } + + sock = socket(ai->ai_family, SOCK_STREAM, IPPROTO_TCP); + + 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")); -int device_total_in = 0; -int device_total_out = 0; + /* 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, bufs[bufno].data, MTU, &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; + } + } + + bufs[bufno].len = len; + if(send(sock, &bufno, 1, 0) <= 0) + return -1; + if(++bufno >= nbufs) + bufno = 0; + } +} bool setup_device(void) { @@ -68,11 +130,22 @@ 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_STREAM, + .ai_protocol = IPPROTO_TCP, + .ai_flags = AI_PASSIVE, + }; + cp(); get_config_string(lookup_config(config_tree, "Device"), &device); @@ -80,8 +153,8 @@ 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")); + if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, NETWORK_CONNECTIONS_KEY, 0, KEY_READ, &key)) { + logger(LOG_ERR, _("Unable to read registry: %s"), winerror(GetLastError())); return false; } @@ -90,6 +163,21 @@ 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", NETWORK_CONNECTIONS_KEY, 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 +186,6 @@ 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 +195,42 @@ 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 +238,66 @@ bool setup_device(void) overwrite_mac = 1; } - if(!get_config_string(lookup_config(config_tree, "Interface"), &iface)) - iface = device; + /* 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); + + 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"); @@ -171,22 +310,23 @@ void close_device(void) { cp(); - CloseHandle(device_fd); + CloseHandle(device_handle); } bool read_packet(vpn_packet_t *packet) { - int lenin; + unsigned char bufno; cp(); - if(!ReadFile(device_fd, packet->data, MTU, &lenin, NULL)) { + 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 = lenin; + packet->len = bufs[bufno].len; + memcpy(packet->data, bufs[bufno].data, bufs[bufno].len); device_total_in += packet->len; @@ -198,15 +338,16 @@ 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; }