X-Git-Url: http://git.meshlink.io/?a=blobdiff_plain;f=src%2Fcygwin%2Fdevice.c;fp=src%2Fcygwin%2Fdevice.c;h=0000000000000000000000000000000000000000;hb=b3b89e46b1b84fa6cf1726fabe9e9c7bb0d3d831;hp=a110f7f2bc0e9600bf75a3a5cc495b941fa5fff1;hpb=4c819a6e3a59da17142bc7bafd0455ca4bf049ac;p=meshlink diff --git a/src/cygwin/device.c b/src/cygwin/device.c deleted file mode 100644 index a110f7f2..00000000 --- a/src/cygwin/device.c +++ /dev/null @@ -1,262 +0,0 @@ -/* - device.c -- Interaction with Windows tap driver in a Cygwin environment - Copyright (C) 2002-2005 Ivo Timmermans, - 2002-2013 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 - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - 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., - 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. -*/ - -#include "../system.h" - -#include -#include - -#include "../conf.h" -#include "../device.h" -#include "../logger.h" -#include "../names.h" -#include "../net.h" -#include "../route.h" -#include "../utils.h" -#include "../xalloc.h" - -#include "../mingw/common.h" - -int device_fd = -1; -static HANDLE device_handle = INVALID_HANDLE_VALUE; -char *device = NULL; -char *iface = NULL; -static char *device_info = NULL; - -static pid_t reader_pid; -static int sp[2]; - -static bool setup_device(void) { - HKEY key, key2; - int i, err; - - char regpath[1024]; - char adapterid[1024]; - char adaptername[1024]; - char tapname[1024]; - char gelukt = 0; - long len; - - bool found = false; - - get_config_string(lookup_config(config_tree, "Device"), &device); - get_config_string(lookup_config(config_tree, "Interface"), &iface); - - /* Open registry and look for network adapters */ - - if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, NETWORK_CONNECTIONS_KEY, 0, KEY_READ, &key)) { - logger(DEBUG_ALWAYS, LOG_ERR, "Unable to read registry: %s", winerror(GetLastError())); - return false; - } - - for (i = 0; ; i++) { - len = sizeof adapterid; - 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; - break; - } else - continue; - } - - if(iface) { - if(!strcmp(iface, adaptername)) { - found = true; - break; - } 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, 0); - if(device_handle != INVALID_HANDLE_VALUE) { - CloseHandle(device_handle); - found = true; - break; - } - } - - RegCloseKey(key); - - if(!found) { - logger(DEBUG_ALWAYS, LOG_ERR, "No Windows tap device found!"); - return false; - } - - if(!device) - device = xstrdup(adapterid); - - if(!iface) - iface = xstrdup(adaptername); - - snprintf(tapname, sizeof tapname, USERMODEDEVICEDIR "%s" TAPSUFFIX, device); - - /* Now we are going to open this device twice: once for reading and once for writing. - We do this because apparently it isn't possible to check for activity in the select() loop. - Furthermore I don't really know how to do it the "Windows" way. */ - - if(socketpair(AF_UNIX, SOCK_DGRAM, PF_UNIX, sp)) { - logger(DEBUG_ALWAYS, LOG_DEBUG, "System call `%s' failed: %s", "socketpair", strerror(errno)); - return false; - } - - /* The parent opens the tap device for writing. */ - - device_handle = CreateFile(tapname, GENERIC_WRITE, FILE_SHARE_READ, 0, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM , 0); - - if(device_handle == INVALID_HANDLE_VALUE) { - logger(DEBUG_ALWAYS, LOG_ERR, "Could not open Windows tap device %s (%s) for writing: %s", device, iface, winerror(GetLastError())); - return false; - } - - device_fd = sp[0]; - - /* 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(DEBUG_ALWAYS, LOG_ERR, "Could not get MAC address from Windows tap device %s (%s): %s", device, iface, winerror(GetLastError())); - return false; - } - - if(routing_mode == RMODE_ROUTER) { - overwrite_mac = 1; - } - - /* Now we start the child */ - - reader_pid = fork(); - - if(reader_pid == -1) { - logger(DEBUG_ALWAYS, LOG_DEBUG, "System call `%s' failed: %s", "fork", strerror(errno)); - return false; - } - - if(!reader_pid) { - /* The child opens the tap device for reading, blocking. - It passes everything it reads to the socket. */ - - char buf[MTU]; - long inlen; - - CloseHandle(device_handle); - - device_handle = CreateFile(tapname, GENERIC_READ, FILE_SHARE_WRITE, 0, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM, 0); - - if(device_handle == INVALID_HANDLE_VALUE) { - logger(DEBUG_ALWAYS, LOG_ERR, "Could not open Windows tap device %s (%s) for reading: %s", device, iface, winerror(GetLastError())); - buf[0] = 0; - write(sp[1], buf, 1); - exit(1); - } - - logger(DEBUG_ALWAYS, LOG_DEBUG, "Tap reader forked and running."); - - /* Notify success */ - - buf[0] = 1; - write(sp[1], buf, 1); - - /* Pass packets */ - - for(;;) { - ReadFile(device_handle, buf, MTU, &inlen, NULL); - write(sp[1], buf, inlen); - } - } - - read(device_fd, &gelukt, 1); - if(gelukt != 1) { - logger(DEBUG_ALWAYS, LOG_DEBUG, "Tap reader failed!"); - return false; - } - - device_info = "Windows tap device"; - - logger(DEBUG_ALWAYS, LOG_INFO, "%s (%s) is a %s", device, iface, device_info); - - return true; -} - -static void close_device(void) { - close(sp[0]); - close(sp[1]); - CloseHandle(device_handle); - - kill(reader_pid, SIGKILL); - - free(device); - free(iface); -} - -static bool read_packet(vpn_packet_t *packet) { - int inlen; - - if((inlen = read(sp[0], packet->data, MTU)) <= 0) { - logger(DEBUG_ALWAYS, LOG_ERR, "Error while reading from %s %s: %s", device_info, - device, strerror(errno)); - return false; - } - - packet->len = inlen; - - logger(DEBUG_TRAFFIC, LOG_DEBUG, "Read packet of %d bytes from %s", packet->len, - device_info); - - return true; -} - -static bool write_packet(vpn_packet_t *packet) { - long outlen; - - logger(DEBUG_TRAFFIC, LOG_DEBUG, "Writing packet of %d bytes to %s", - packet->len, device_info); - - if(!WriteFile (device_handle, packet->data, packet->len, &outlen, NULL)) { - logger(DEBUG_ALWAYS, LOG_ERR, "Error while writing to %s %s: %s", device_info, device, winerror(GetLastError())); - return false; - } - - return true; -} - -const devops_t os_devops = { - .setup = setup_device, - .close = close_device, - .read = read_packet, - .write = write_packet, -};