X-Git-Url: https://tinc-vpn.org/git/browse?a=blobdiff_plain;f=src%2Fmingw%2Fdevice.c;h=2ef0064189b877e925c8597f0d8176c057a6205c;hb=1d10afd3d33f5623494d9eeb2fa8237712f8aa2e;hp=3b1458c6251ac3321bec154fa6d2bd94c26115a0;hpb=70a1a5594af5d4e6a364186b42ba4e34c676009b;p=tinc diff --git a/src/mingw/device.c b/src/mingw/device.c index 3b1458c6..2ef00641 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, - 2002-2012 Guus Sliepen + 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 @@ -18,69 +18,59 @@ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ -#include "system.h" +#include "../system.h" #include #include -#include "conf.h" -#include "device.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 "../names.h" +#include "../net.h" +#include "../route.h" +#include "../utils.h" +#include "../xalloc.h" -#include "mingw/common.h" +#include "common.h" int device_fd = -1; static HANDLE device_handle = INVALID_HANDLE_VALUE; +static io_t device_read_io; +static OVERLAPPED device_read_overlapped; +static vpn_packet_t device_read_packet; 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; - long len; - OVERLAPPED overlapped; - vpn_packet_t packet; - - logger(DEBUG_ALWAYS, LOG_DEBUG, "Tap reader running"); - - /* Read from tap device and send to parent */ +static void device_issue_read() { + device_read_overlapped.Offset = 0; + device_read_overlapped.OffsetHigh = 0; - overlapped.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL); + int status = ReadFile(device_handle, (void *)device_read_packet.data, MTU, NULL, &device_read_overlapped); - for(;;) { - overlapped.Offset = 0; - overlapped.OffsetHigh = 0; - ResetEvent(overlapped.hEvent); - - status = ReadFile(device_handle, packet.data, MTU, &len, &overlapped); + if(!status && GetLastError() != ERROR_IO_PENDING) { + logger(DEBUG_ALWAYS, LOG_ERR, "Error while reading from %s %s: %s", device_info, + device, strerror(errno)); + } +} - 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; - } - } +static void device_handle_read(void *data, int flags) { + ResetEvent(device_read_overlapped.hEvent); - EnterCriticalSection(&mutex); - packet.len = len; - packet.priority = 0; - route(myself, &packet); - LeaveCriticalSection(&mutex); + DWORD len; + if (!GetOverlappedResult(device_handle, &device_read_overlapped, &len, FALSE)) { + logger(DEBUG_ALWAYS, LOG_ERR, "Error getting read result from %s %s: %s", device_info, + device, strerror(errno)); + return; } + + device_read_packet.len = len; + device_read_packet.priority = 0; + route(myself, &device_read_packet); + device_issue_read(); } static bool setup_device(void) { @@ -91,13 +81,11 @@ static bool setup_device(void) { char adapterid[1024]; char adaptername[1024]; char tapname[1024]; - long len; - unsigned long status; + DWORD len; 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); @@ -122,7 +110,7 @@ static bool setup_device(void) { continue; len = sizeof adaptername; - err = RegQueryValueEx(key2, "Name", 0, 0, adaptername, &len); + err = RegQueryValueEx(key2, "Name", 0, 0, (LPBYTE)adaptername, &len); RegCloseKey(key2); @@ -189,32 +177,43 @@ static bool setup_device(void) { overwrite_mac = 1; } - /* Start the tap reader */ + device_info = "Windows tap device"; - thread = CreateThread(NULL, 0, tapreader, NULL, 0, NULL); + logger(DEBUG_ALWAYS, LOG_INFO, "%s (%s) is a %s", device, iface, device_info); - if(!thread) { - logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "CreateThread", winerror(GetLastError())); - return false; - } + return true; +} - /* Set media status for newer TAP-Win32 devices */ +static void enable_device(void) { + logger(DEBUG_ALWAYS, LOG_INFO, "Enabling %s", device_info); - status = true; + ULONG status = 1; + DWORD len; DeviceIoControl(device_handle, TAP_IOCTL_SET_MEDIA_STATUS, &status, sizeof status, &status, sizeof status, &len, NULL); - device_info = "Windows tap device"; + io_add_event(&device_read_io, device_handle_read, NULL, CreateEvent(NULL, TRUE, FALSE, NULL)); + device_read_overlapped.hEvent = device_read_io.event; + device_issue_read(); +} - logger(DEBUG_ALWAYS, LOG_INFO, "%s (%s) is a %s", device, iface, device_info); +static void disable_device(void) { + logger(DEBUG_ALWAYS, LOG_INFO, "Disabling %s", device_info); - return true; + io_del(&device_read_io); + CancelIo(device_handle); + CloseHandle(device_read_overlapped.hEvent); + + ULONG status = 0; + DWORD len; + DeviceIoControl(device_handle, TAP_IOCTL_SET_MEDIA_STATUS, &status, sizeof status, &status, sizeof status, &len, NULL); } static void close_device(void) { - CloseHandle(device_handle); + CloseHandle(device_handle); device_handle = INVALID_HANDLE_VALUE; - free(device); - free(iface); + free(device); device = NULL; + free(iface); iface = NULL; + device_info = NULL; } static bool read_packet(vpn_packet_t *packet) { @@ -222,7 +221,7 @@ static bool read_packet(vpn_packet_t *packet) { } static bool write_packet(vpn_packet_t *packet) { - long outlen; + DWORD outlen; OVERLAPPED overlapped = {0}; logger(DEBUG_TRAFFIC, LOG_DEBUG, "Writing packet of %d bytes to %s", @@ -233,21 +232,14 @@ static bool write_packet(vpn_packet_t *packet) { return false; } - device_total_out += packet->len; - return true; } -static void dump_device_stats(void) { - logger(DEBUG_ALWAYS, LOG_DEBUG, "Statistics for %s %s:", device_info, device); - logger(DEBUG_ALWAYS, LOG_DEBUG, " total bytes in: %10"PRIu64, device_total_in); - logger(DEBUG_ALWAYS, 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, + .enable = enable_device, + .disable = disable_device, };