+++ /dev/null
-/*
- device.c -- Interaction with Windows tap driver in a MinGW environment
- Copyright (C) 2002-2005 Ivo Timmermans,
- 2002-2013 Guus Sliepen <guus@tinc-vpn.org>
-
- 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 <windows.h>
-#include <winioctl.h>
-
-#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 "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 uint64_t device_total_in = 0;
-static uint64_t device_total_out = 0;
-
-extern char *myport;
-
-static DWORD WINAPI tapreader(void *bla) {
- int status;
- DWORD len;
- OVERLAPPED overlapped;
- vpn_packet_t packet;
-
- logger(DEBUG_ALWAYS, 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, (void *)packet.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(DEBUG_ALWAYS, LOG_ERR, "Error while reading from %s %s: %s", device_info,
- device, strerror(errno));
- return -1;
- }
- }
-
- EnterCriticalSection(&mutex);
- packet.len = len;
- packet.priority = 0;
- route(myself, &packet);
- event_flush_output();
- LeaveCriticalSection(&mutex);
- }
-}
-
-static bool setup_device(void) {
- HKEY key, key2;
- int i;
-
- char regpath[1024];
- char adapterid[1024];
- char adaptername[1024];
- char tapname[1024];
- DWORD len;
- unsigned long status;
-
- bool found = false;
-
- int err;
- HANDLE thread;
-
- 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, (LPBYTE)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 | FILE_FLAG_OVERLAPPED, 0);
- if(device_handle != INVALID_HANDLE_VALUE) {
- 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);
-
- /* Try to open the corresponding tap device */
-
- if(device_handle == INVALID_HANDLE_VALUE) {
- 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(DEBUG_ALWAYS, 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(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;
- }
-
- /* Start the tap reader */
-
- thread = CreateThread(NULL, 0, tapreader, NULL, 0, NULL);
-
- if(!thread) {
- logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "CreateThread", winerror(GetLastError()));
- return false;
- }
-
- /* 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(DEBUG_ALWAYS, LOG_INFO, "%s (%s) is a %s", device, iface, device_info);
-
- return true;
-}
-
-static void close_device(void) {
- CloseHandle(device_handle);
-
- free(device);
- free(iface);
-}
-
-static bool read_packet(vpn_packet_t *packet) {
- return false;
-}
-
-static bool write_packet(vpn_packet_t *packet) {
- DWORD outlen;
- OVERLAPPED overlapped = {0};
-
- 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, &overlapped)) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Error while writing to %s %s: %s", device_info, device, winerror(GetLastError()));
- return false;
- }
-
- device_total_out += packet->len;
-
- return true;
-}
-
-const devops_t os_devops = {
- .setup = setup_device,
- .close = close_device,
- .read = read_packet,
- .write = write_packet,
-};
projects / meshlink / blobdiff