/*
device.c -- Interaction with Windows tap driver in a Cygwin environment
Copyright (C) 2002-2005 Ivo Timmermans,
- 2002-2011 Guus Sliepen <guus@tinc-vpn.org>
+ 2002-2016 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
*/
#include "../system.h"
+#include "../net.h"
#include <w32api/windows.h>
#include <w32api/winioctl.h>
#include "../conf.h"
#include "../device.h"
#include "../logger.h"
-#include "../net.h"
#include "../route.h"
#include "../utils.h"
#include "../xalloc.h"
static HANDLE device_handle = INVALID_HANDLE_VALUE;
char *device = NULL;
char *iface = NULL;
-static char *device_info = NULL;
+static const char *device_info = "Windows tap device";
static uint64_t device_total_in = 0;
static uint64_t device_total_out = 0;
get_config_string(lookup_config(config_tree, "Device"), &device);
get_config_string(lookup_config(config_tree, "Interface"), &iface);
- if(device && interface)
+ if(device && iface) {
logger(LOG_WARNING, "Warning: both Device and Interface specified, results may not be as expected");
+ }
/* Open registry and look for network adapters */
return false;
}
- for (i = 0; ; i++) {
+ for(i = 0; ; i++) {
len = sizeof(adapterid);
- if(RegEnumKeyEx(key, i, adapterid, &len, 0, 0, 0, NULL))
+
+ 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))
+ 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)
+ if(err) {
continue;
+ }
if(device) {
if(!strcmp(device, adapterid)) {
found = true;
break;
- } else
+ } else {
continue;
+ }
}
if(iface) {
if(!strcmp(iface, adaptername)) {
found = true;
break;
- } else
+ } 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;
return false;
}
- if(!device)
+ if(!device) {
device = xstrdup(adapterid);
+ }
- if(!iface)
+ 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. */
}
/* The parent opens the tap device for writing. */
-
- device_handle = CreateFile(tapname, GENERIC_WRITE, FILE_SHARE_READ, 0, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM , 0);
-
+
+ device_handle = CreateFile(tapname, GENERIC_WRITE, FILE_SHARE_READ, 0, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM, 0);
+
if(device_handle == INVALID_HANDLE_VALUE) {
logger(LOG_ERR, "Could not open Windows tap device %s (%s) for writing: %s", device, iface, winerror(GetLastError()));
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 lenin;
}
read(device_fd, &gelukt, 1);
+
if(gelukt != 1) {
logger(LOG_DEBUG, "Tap reader failed!");
return false;
}
- device_info = "Windows tap device";
-
logger(LOG_INFO, "%s (%s) is a %s", device, iface, device_info);
return true;
if((lenin = read(sp[0], packet->data, MTU)) <= 0) {
logger(LOG_ERR, "Error while reading from %s %s: %s", device_info,
- device, strerror(errno));
+ device, strerror(errno));
return false;
}
-
+
packet->len = lenin;
device_total_in += packet->len;
ifdebug(TRAFFIC) logger(LOG_DEBUG, "Read packet of %d bytes from %s", packet->len,
- device_info);
+ device_info);
return true;
}
long lenout;
ifdebug(TRAFFIC) logger(LOG_DEBUG, "Writing packet of %d bytes to %s",
- packet->len, device_info);
+ packet->len, device_info);
- if(!WriteFile (device_handle, packet->data, packet->len, &lenout, NULL)) {
+ if(!WriteFile(device_handle, packet->data, packet->len, &lenout, NULL)) {
logger(LOG_ERR, "Error while writing to %s %s: %s", device_info, device, winerror(GetLastError()));
return false;
}