X-Git-Url: https://tinc-vpn.org/git/browse?a=blobdiff_plain;f=src%2Fmingw%2Fdevice.c;h=2ef0064189b877e925c8597f0d8176c057a6205c;hb=1d10afd3d33f5623494d9eeb2fa8237712f8aa2e;hp=2c82b3c9018256c91a514a5da085f6761dd133c4;hpb=6c05bf082b1ce9acfc0ebb5c6f32c2ece41c7f80;p=tinc diff --git a/src/mingw/device.c b/src/mingw/device.c index 2c82b3c9..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, - 2002-2009 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 @@ -18,71 +18,62 @@ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ -#include "system.h" +#include "../system.h" #include #include -#include "conf.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(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(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(); } -bool setup_device(void) { +static bool setup_device(void) { HKEY key, key2; int i; @@ -90,13 +81,11 @@ 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); @@ -104,24 +93,24 @@ bool setup_device(void) { /* Open registry and look for network adapters */ if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, NETWORK_CONNECTIONS_KEY, 0, KEY_READ, &key)) { - logger(LOG_ERR, "Unable to read registry: %s", winerror(GetLastError())); + logger(DEBUG_ALWAYS, LOG_ERR, "Unable to read registry: %s", winerror(GetLastError())); return false; } for (i = 0; ; i++) { - len = sizeof(adapterid); + 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); + snprintf(regpath, sizeof regpath, "%s\\%s\\Connection", NETWORK_CONNECTIONS_KEY, adapterid); - if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, regpath, 0, KEY_READ, &key2)) + if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, regpath, 0, KEY_READ, &key2)) continue; - len = sizeof(adaptername); - err = RegQueryValueEx(key2, "Name", 0, 0, adaptername, &len); + len = sizeof adaptername; + err = RegQueryValueEx(key2, "Name", 0, 0, (LPBYTE)adaptername, &len); RegCloseKey(key2); @@ -144,7 +133,7 @@ bool setup_device(void) { continue; } - snprintf(tapname, sizeof(tapname), USERMODEDEVICEDIR "%s" TAPSUFFIX, adapterid); + 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; @@ -155,7 +144,7 @@ bool setup_device(void) { RegCloseKey(key); if(!found) { - logger(LOG_ERR, "No Windows tap device found!"); + logger(DEBUG_ALWAYS, LOG_ERR, "No Windows tap device found!"); return false; } @@ -168,19 +157,19 @@ bool setup_device(void) { /* Try to open the corresponding tap device */ if(device_handle == INVALID_HANDLE_VALUE) { - snprintf(tapname, sizeof(tapname), USERMODEDEVICEDIR "%s" TAPSUFFIX, device); + 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(LOG_ERR, "%s (%s) is not a usable Windows tap device: %s", device, iface, winerror(GetLastError())); + 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(LOG_ERR, "Could not get MAC address from Windows tap device %s (%s): %s", device, iface, winerror(GetLastError())); + 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; } @@ -188,57 +177,69 @@ bool setup_device(void) { overwrite_mac = 1; } - /* Start the tap reader */ + device_info = "Windows tap device"; + + logger(DEBUG_ALWAYS, LOG_INFO, "%s (%s) is a %s", device, iface, device_info); - thread = CreateThread(NULL, 0, tapreader, NULL, 0, NULL); + return true; +} - if(!thread) { - logger(LOG_ERR, "System call `%s' failed: %s", "CreateThread", winerror(GetLastError())); - return false; - } +static void enable_device(void) { + logger(DEBUG_ALWAYS, LOG_INFO, "Enabling %s", device_info); - /* Set media status for newer TAP-Win32 devices */ + ULONG status = 1; + DWORD len; + DeviceIoControl(device_handle, TAP_IOCTL_SET_MEDIA_STATUS, &status, sizeof status, &status, sizeof status, &len, NULL); - status = true; - DeviceIoControl(device_handle, TAP_IOCTL_SET_MEDIA_STATUS, &status, sizeof(status), &status, sizeof(status), &len, NULL); + 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(); +} - device_info = "Windows tap device"; +static void disable_device(void) { + logger(DEBUG_ALWAYS, LOG_INFO, "Disabling %s", device_info); - logger(LOG_INFO, "%s (%s) is a %s", device, iface, device_info); + io_del(&device_read_io); + CancelIo(device_handle); + CloseHandle(device_read_overlapped.hEvent); - return true; + ULONG status = 0; + DWORD len; + DeviceIoControl(device_handle, TAP_IOCTL_SET_MEDIA_STATUS, &status, sizeof status, &status, sizeof status, &len, NULL); } -void close_device(void) { - CloseHandle(device_handle); +static void close_device(void) { + CloseHandle(device_handle); device_handle = INVALID_HANDLE_VALUE; - free(device); - free(iface); + free(device); device = NULL; + free(iface); iface = NULL; + device_info = NULL; } -bool read_packet(vpn_packet_t *packet) { +static bool read_packet(vpn_packet_t *packet) { return false; } -bool write_packet(vpn_packet_t *packet) { - long lenout; +static bool write_packet(vpn_packet_t *packet) { + DWORD outlen; OVERLAPPED overlapped = {0}; - ifdebug(TRAFFIC) logger(LOG_DEBUG, "Writing packet of %d bytes to %s", + logger(DEBUG_TRAFFIC, LOG_DEBUG, "Writing packet of %d bytes to %s", packet->len, device_info); - 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())); + 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; } -void dump_device_stats(void) { - logger(LOG_DEBUG, "Statistics for %s %s:", device_info, device); - logger(LOG_DEBUG, " total bytes in: %10"PRIu64, device_total_in); - logger(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, + .enable = enable_device, + .disable = disable_device, +};