X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fmingw%2Fdevice.c;h=33b13da60b89a9496f311c50f48757af9764ded7;hp=b67d0d349033f70177640f561f9c73c5fb8cd60b;hb=e57daac63b6f703af8e7c8209ef61a4d3b2180c3;hpb=d6c50eb73ad49bd2eac67214995dff76b7a20661 diff --git a/src/mingw/device.c b/src/mingw/device.c index b67d0d34..33b13da6 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 +18,65 @@ 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 int device_total_in = 0; -static int device_total_out = 0; +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; +static void device_issue_read() { + device_read_overlapped.Offset = 0; + device_read_overlapped.OffsetHigh = 0; - logger(LOG_DEBUG, "Tap reader running"); + int status = ReadFile(device_handle, (void *)device_read_packet.data, MTU, NULL, &device_read_overlapped); - /* 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, 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) { + 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; @@ -90,29 +84,20 @@ bool setup_device(void) { char adapterid[1024]; char adaptername[1024]; char tapname[1024]; - long len; - unsigned long status; + DWORD len; bool found = false; - int sock, err; + int err; HANDLE thread; - struct addrinfo *ai; - struct addrinfo hint = { - .ai_family = AF_UNSPEC, - .ai_socktype = SOCK_STREAM, - .ai_protocol = IPPROTO_TCP, - .ai_flags = 0, - }; - 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(LOG_ERR, "Unable to read registry: %s", winerror(GetLastError())); + logger(DEBUG_ALWAYS, LOG_ERR, "Unable to read registry: %s", winerror(GetLastError())); return false; } @@ -125,11 +110,11 @@ bool setup_device(void) { 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); + err = RegQueryValueEx(key2, "Name", 0, 0, (LPBYTE)adaptername, &len); RegCloseKey(key2); @@ -163,7 +148,7 @@ 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; } @@ -179,16 +164,16 @@ bool setup_device(void) { 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())); + logger(DEBUG_ALWAYS, LOG_ERR, "Could not get MAC address from Windows tap device %s (%s): %s", device, iface, winerror(GetLastError())); return false; } @@ -198,45 +183,55 @@ bool setup_device(void) { /* 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; - } - - /* 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); + 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"; - logger(LOG_INFO, "%s (%s) is a %s", device, iface, device_info); + logger(DEBUG_ALWAYS, LOG_INFO, "%s (%s) is a %s", device, iface, device_info); return true; } -void close_device(void) { - CloseHandle(device_handle); +static void enable_device(void) { + logger(DEBUG_ALWAYS, LOG_INFO, "Enabling %s", device_info); + ULONG status = 1; + DWORD len; + DeviceIoControl(device_handle, TAP_IOCTL_SET_MEDIA_STATUS, &status, sizeof status, &status, sizeof status, &len, NULL); +} - free(device); - free(iface); +static void disable_device(void) { + logger(DEBUG_ALWAYS, LOG_INFO, "Disabling %s", device_info); + ULONG status = 0; + DWORD len; + DeviceIoControl(device_handle, TAP_IOCTL_SET_MEDIA_STATUS, &status, sizeof status, &status, sizeof status, &len, NULL); } -bool read_packet(vpn_packet_t *packet) { +static void close_device(void) { + io_del(&device_read_io); + CancelIo(device_handle); + CloseHandle(device_read_overlapped.hEvent); + CloseHandle(device_handle); device_handle = INVALID_HANDLE_VALUE; + + free(device); device = NULL; + free(iface); iface = NULL; + device_info = NULL; +} + +static bool read_packet(vpn_packet_t *packet) { return false; } -bool write_packet(vpn_packet_t *packet) { - long outlen; +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, &outlen, &overlapped)) { - logger(LOG_ERR, "Error while writing to %s %s: %s", device_info, device, winerror(GetLastError())); + logger(DEBUG_ALWAYS, LOG_ERR, "Error while writing to %s %s: %s", device_info, device, winerror(GetLastError())); return false; } @@ -245,8 +240,11 @@ bool write_packet(vpn_packet_t *packet) { return true; } -void dump_device_stats(void) { - logger(LOG_DEBUG, "Statistics for %s %s:", device_info, device); - logger(LOG_DEBUG, " total bytes in: %10d", device_total_in); - logger(LOG_DEBUG, " total bytes out: %10d", 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, +};