X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fmingw%2Fdevice.c;h=b9588318f15ad894d3cb2d2da193c75c16dbd7f4;hp=d8aabcc4526bc6cdd187d25f7aaa61fa3682d1e1;hb=5a161e86cf35351f5274d7a8e17fef4630b40686;hpb=eefa28059ab989c915a7d95fb4ae728abd7ce713

diff --git a/src/mingw/device.c b/src/mingw/device.c
index d8aabcc4..b9588318 100644
--- a/src/mingw/device.c
+++ b/src/mingw/device.c
@@ -1,304 +1,253 @@
-/*
-    device.c -- Interaction with CIPE driver in a MinGW environment
-    Copyright (C) 2002-2003 Ivo Timmermans <ivo@o2w.nl>,
-                  2002-2003 Guus Sliepen <guus@sliepen.eu.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., 675 Mass Ave, Cambridge, MA 02139, USA.
-
-    $Id: device.c,v 1.1.2.2 2003/07/22 20:55:21 guus Exp $
-*/
-
-#error "Device driver for MinGW environment not written yet!"
-
-#include "system.h"
-
-#include <winioctl.h>
-
-#include "conf.h"
-#include "logger.h"
-#include "net.h"
-#include "route.h"
-#include "utils.h"
-#include "xalloc.h"
-
-/* Definitions from CIPE */
-
-#define NETCARD_REG_KEY_2000 "SYSTEM\\CurrentControlSet\\Control\\Class\\{4D36E972-E325-11CE-BFC1-08002BE10318}"
-#define NETCARD_REG_KEY      "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\NetworkCards"
-#define REG_SERVICE_KEY      "SYSTEM\\CurrentControlSet\\Services"
-
-#define USERMODEDEVICEDIR "\\\\.\\"
-#define SYSDEVICEDIR  "\\Device\\"
-#define USERDEVICEDIR "\\??\\"
-#define TAPSUFFIX     ".tap"
-
-#define PRODUCT_STRING "DKW Heavy Industries VPN Adapter."
-#define CIPE_SERVICE_NAME "CIPE_Daemon"
-#define CIPE_DRIVER_NAME "CIPE"
-
-#define CIPE_NDIS_MAJOR_VERSION 4
-#define CIPE_NDIS_MINOR_VERSION 0
-
-#ifndef CIPE_DRIVER_MAJOR_VERSION
-#   define CIPE_DRIVER_MAJOR_VERSION 2
-#endif
-
-#ifndef CIPE_DRIVER_MINOR_VERSION
-#   define CIPE_DRIVER_MINOR_VERSION 1
-#endif
-
-#ifndef CIPE_MAC_ROOT_ADDRESS
-#   define CIPE_MAC_ROOT_ADDRESS "8:0:58:0:0:1"
-#endif
-
-#define CIPE_CONTROL_CODE(request,method) CTL_CODE (FILE_DEVICE_PHYSICAL_NETCARD | 8000, request, method, FILE_ANY_ACCESS)
-
-#define CIPE_IOCTL_GET_LASTMAC    CIPE_CONTROL_CODE (0, METHOD_BUFFERED)
-#define CIPE_IOCTL_GET_MAC        CIPE_CONTROL_CODE (1, METHOD_BUFFERED)
-#define CIPE_IOCTL_SET_STATISTICS CIPE_CONTROL_CODE (2, METHOD_BUFFERED)
-
-/* Windows 2000 */
-#define OSTYPE 5
-
-int device_fd = -1;
-char *device = NULL;
-char *iface = NULL;
-char *device_info = NULL;
-
-int device_total_in = 0;
-int device_total_out = 0;
-
-HANDLE handle;
-
-pid_t reader_pid;
-int sp[2];
-
-bool setup_device(void)
-{
-	HKEY key, key2, adapterkey;
-	int i;
-
-	char adapterid[1024];
-	char manufacturer[1024];
-	char productname[1024];
-	char adaptername[1024];
-	char tapname[1024];
-	char gelukt = 0;
-	long len;
-
-	FILETIME filetime;
-	bool found = false;
-
-	cp();
-
-	get_config_string(lookup_config(config_tree, "Device"), &device);
-
-	/* Open registry and look for network adapters */
-
-	if (RegOpenKeyEx (HKEY_LOCAL_MACHINE, (OSTYPE > 4 ? NETCARD_REG_KEY_2000 : NETCARD_REG_KEY), 0, KEY_READ, &key)) {
-		logger(LOG_ERR, _("Unable to read registry"));
-		return false;
-	}
-
-	for (i = 0; ; i++) {
-		len = sizeof(adapterid);
-		if(RegEnumKeyEx (key, i, adapterid, &len, 0, 0, 0, &filetime))
-			break;
-
-		/* Find out more about this adapter */
-
-                if(RegOpenKeyEx (key, adapterid, 0, KEY_READ, &adapterkey)) {
-			logger(LOG_ERR, _("Unable to read registry"));
-			return false;
-		}
-
-		len = sizeof(productname);
-		if(RegQueryValueEx(adapterkey, "ProductName", 0, 0, productname, &len))
-			goto skip;
-
-		len = sizeof(manufacturer);
-		if(RegQueryValueEx(adapterkey, "Manufacturer", 0, 0, manufacturer, &len))
-			goto skip;
-
-		if(!strcmp(productname, "CIPE") && !strcmp(manufacturer, "DKWHeavyIndustries")) {
-			if(device && strcmp(adapterid, device))
-				continue;
-			if(!device)
-				device = xstrdup(adapterid);
-			found = true;
-			break;
-		}
-		
-skip:
-                RegCloseKey (adapterkey);
-	}
-
-	if(!found) {
-		logger(LOG_ERR, _("No CIPE adapters found!"));
-		return false;
-	}
-
-	/* Get adapter name */
-
-	len = sizeof(adaptername);
-	RegQueryValueEx(adapterkey, (OSTYPE > 4 ? "NetCfgInstanceId" : "ServiceName"), 0, 0, adaptername, &len);
-
-	/* FIXME? cipsrvr checks if the device is in use at this point */
-
-	/* Try to open the corresponding tap device */
-
-	snprintf(tapname, sizeof(tapname), USERMODEDEVICEDIR "%s" TAPSUFFIX, adaptername);
-	
-	/* 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. */
-
-	if(socketpair(AF_UNIX, SOCK_DGRAM, PF_UNIX, sp)) {
-		logger(LOG_DEBUG, _("System call `%s' failed: %s"), "socketpair", strerror(errno));
-		return false;
-	}
-
-	reader_pid = fork();
-
-	if(reader_pid == -1) {
-		logger(LOG_DEBUG, _("System call `%s' failed: %s"), "fork", strerror(errno));
-		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];
-		int lenin;
-
-		handle = CreateFile(tapname, GENERIC_READ,  FILE_SHARE_WRITE,  0,  OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM , 0);
-
-		if(handle == INVALID_HANDLE_VALUE) {
-			logger(LOG_ERR, _("Could not open CIPE tap device for reading!"));
-			buf[0] = 0;
-			write(sp[1], buf, 1);
-			exit(1);
-		}
-
-		logger(LOG_DEBUG, _("Tap reader forked and running."));
-
-		/* Notify success */
-
-		buf[0] = 1;
-		write(sp[1], buf, 1);
-
-		/* Pass packets */
-
-		for(;;) {
-			ReadFile (handle, buf, MTU, &lenin, NULL);
-			write(sp[1], buf, lenin);
-		}
-	}
-
-	/* The parent opens the tap device for writing. */
-	
-	handle = CreateFile(tapname, GENERIC_WRITE,  FILE_SHARE_READ,  0,  OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM , 0);
-	
-	if(handle == INVALID_HANDLE_VALUE) {
-		logger(LOG_ERR, _("Could not open CIPE tap device for writing!"));
-		return false;
-	}
-
-	device_fd = sp[0];
-
-	/* Get MAC address from tap device */
-
-	if(routing_mode == RMODE_ROUTER) {
-		DeviceIoControl (handle, CIPE_IOCTL_GET_MAC, mymac.x, sizeof(mymac.x), mymac.x, sizeof(mymac.x), &len, 0);
-		overwrite_mac = 1;
-	}
-
-	read(device_fd, &gelukt, 1);
-	if(gelukt != 1) {
-		logger(LOG_DEBUG, "Tap reader failed!");
-		return false;
-	}
-
-	if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
-		iface = device;
-
-	device_info = _("Cygwin CIPE device");
-
-	logger(LOG_INFO, _("%s is a %s"), device, device_info);
-
-	return true;
-}
-
-void close_device(void)
-{
-	cp();
-
-	close(sp[0]);
-	close(sp[1]);
-	CloseHandle(handle);
-
-	kill(reader_pid, SIGKILL);
-}
-
-bool read_packet(vpn_packet_t *packet)
-{
-	int lenin;
-
-	cp();
-
-	if((lenin = read(sp[0], packet->data, MTU)) <= 0) {
-		logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
-			   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);
-
-	return true;
-}
-
-bool write_packet(vpn_packet_t *packet)
-{
-	int lenout;
-
-	cp();
-
-	ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
-			   packet->len, device_info);
-
-	if(!WriteFile (handle, packet->data, packet->len, &lenout, NULL)) {
-		logger(LOG_ERR, "Error while writing to %s %s", device_info, device);
-		return false;
-	}
-
-	device_total_out += packet->len;
-
-	return true;
-}
-
-void dump_device_stats(void)
-{
-	cp();
-
-	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);
-}
+/*
+    device.c -- Interaction with Windows tap driver in a MinGW environment
+    Copyright (C) 2002-2005 Ivo Timmermans,
+                  2002-2011 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 "net.h"
+#include "route.h"
+#include "utils.h"
+#include "xalloc.h"
+
+#include "mingw/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;
+	long len;
+	OVERLAPPED overlapped;
+	vpn_packet_t packet;
+
+	logger(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, 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(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);
+		LeaveCriticalSection(&mutex);
+	}
+}
+
+static bool setup_device(void) {
+	HKEY key, key2;
+	int i;
+
+	char regpath[1024];
+	char adapterid[1024];
+	char adaptername[1024];
+	char tapname[1024];
+	long 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(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, 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(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(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()));
+		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(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(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) {
+	long lenout;
+	OVERLAPPED overlapped = {0};
+
+	ifdebug(TRAFFIC) logger(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()));
+		return false;
+	}
+
+	device_total_out += packet->len;
+
+	return true;
+}
+
+static 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,
+	.dump_stats = dump_device_stats,
+};