-/*\r
- device.c -- Interaction with CIPE driver in a MinGW environment\r
- Copyright (C) 2002-2003 Ivo Timmermans <ivo@o2w.nl>,\r
- 2002-2003 Guus Sliepen <guus@sliepen.eu.org>\r
-\r
- This program is free software; you can redistribute it and/or modify\r
- it under the terms of the GNU General Public License as published by\r
- the Free Software Foundation; either version 2 of the License, or\r
- (at your option) any later version.\r
-\r
- This program is distributed in the hope that it will be useful,\r
- but WITHOUT ANY WARRANTY; without even the implied warranty of\r
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
- GNU General Public License for more details.\r
-\r
- You should have received a copy of the GNU General Public License\r
- along with this program; if not, write to the Free Software\r
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.\r
-\r
- $Id: device.c,v 1.1.2.2 2003/07/22 20:55:21 guus Exp $\r
-*/\r
-\r
-#error "Device driver for MinGW environment not written yet!"\r
-\r
-#include "system.h"\r
-\r
-#include <winioctl.h>\r
-\r
-#include "conf.h"\r
-#include "logger.h"\r
-#include "net.h"\r
-#include "route.h"\r
-#include "utils.h"\r
-#include "xalloc.h"\r
-\r
-/* Definitions from CIPE */\r
-\r
-#define NETCARD_REG_KEY_2000 "SYSTEM\\CurrentControlSet\\Control\\Class\\{4D36E972-E325-11CE-BFC1-08002BE10318}"\r
-#define NETCARD_REG_KEY "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\NetworkCards"\r
-#define REG_SERVICE_KEY "SYSTEM\\CurrentControlSet\\Services"\r
-\r
-#define USERMODEDEVICEDIR "\\\\.\\"\r
-#define SYSDEVICEDIR "\\Device\\"\r
-#define USERDEVICEDIR "\\??\\"\r
-#define TAPSUFFIX ".tap"\r
-\r
-#define PRODUCT_STRING "DKW Heavy Industries VPN Adapter."\r
-#define CIPE_SERVICE_NAME "CIPE_Daemon"\r
-#define CIPE_DRIVER_NAME "CIPE"\r
-\r
-#define CIPE_NDIS_MAJOR_VERSION 4\r
-#define CIPE_NDIS_MINOR_VERSION 0\r
-\r
-#ifndef CIPE_DRIVER_MAJOR_VERSION\r
-# define CIPE_DRIVER_MAJOR_VERSION 2\r
-#endif\r
-\r
-#ifndef CIPE_DRIVER_MINOR_VERSION\r
-# define CIPE_DRIVER_MINOR_VERSION 1\r
-#endif\r
-\r
-#ifndef CIPE_MAC_ROOT_ADDRESS\r
-# define CIPE_MAC_ROOT_ADDRESS "8:0:58:0:0:1"\r
-#endif\r
-\r
-#define CIPE_CONTROL_CODE(request,method) CTL_CODE (FILE_DEVICE_PHYSICAL_NETCARD | 8000, request, method, FILE_ANY_ACCESS)\r
-\r
-#define CIPE_IOCTL_GET_LASTMAC CIPE_CONTROL_CODE (0, METHOD_BUFFERED)\r
-#define CIPE_IOCTL_GET_MAC CIPE_CONTROL_CODE (1, METHOD_BUFFERED)\r
-#define CIPE_IOCTL_SET_STATISTICS CIPE_CONTROL_CODE (2, METHOD_BUFFERED)\r
-\r
-/* Windows 2000 */\r
-#define OSTYPE 5\r
-\r
-int device_fd = -1;\r
-char *device = NULL;\r
-char *iface = NULL;\r
-char *device_info = NULL;\r
-\r
-int device_total_in = 0;\r
-int device_total_out = 0;\r
-\r
-HANDLE handle;\r
-\r
-pid_t reader_pid;\r
-int sp[2];\r
-\r
-bool setup_device(void)\r
-{\r
- HKEY key, key2, adapterkey;\r
- int i;\r
-\r
- char adapterid[1024];\r
- char manufacturer[1024];\r
- char productname[1024];\r
- char adaptername[1024];\r
- char tapname[1024];\r
- char gelukt = 0;\r
- long len;\r
-\r
- FILETIME filetime;\r
- bool found = false;\r
-\r
- cp();\r
-\r
- get_config_string(lookup_config(config_tree, "Device"), &device);\r
-\r
- /* Open registry and look for network adapters */\r
-\r
- if (RegOpenKeyEx (HKEY_LOCAL_MACHINE, (OSTYPE > 4 ? NETCARD_REG_KEY_2000 : NETCARD_REG_KEY), 0, KEY_READ, &key)) {\r
- logger(LOG_ERR, _("Unable to read registry"));\r
- return false;\r
- }\r
-\r
- for (i = 0; ; i++) {\r
- len = sizeof(adapterid);\r
- if(RegEnumKeyEx (key, i, adapterid, &len, 0, 0, 0, &filetime))\r
- break;\r
-\r
- /* Find out more about this adapter */\r
-\r
- if(RegOpenKeyEx (key, adapterid, 0, KEY_READ, &adapterkey)) {\r
- logger(LOG_ERR, _("Unable to read registry"));\r
- return false;\r
- }\r
-\r
- len = sizeof(productname);\r
- if(RegQueryValueEx(adapterkey, "ProductName", 0, 0, productname, &len))\r
- goto skip;\r
-\r
- len = sizeof(manufacturer);\r
- if(RegQueryValueEx(adapterkey, "Manufacturer", 0, 0, manufacturer, &len))\r
- goto skip;\r
-\r
- if(!strcmp(productname, "CIPE") && !strcmp(manufacturer, "DKWHeavyIndustries")) {\r
- if(device && strcmp(adapterid, device))\r
- continue;\r
- if(!device)\r
- device = xstrdup(adapterid);\r
- found = true;\r
- break;\r
- }\r
- \r
-skip:\r
- RegCloseKey (adapterkey);\r
- }\r
-\r
- if(!found) {\r
- logger(LOG_ERR, _("No CIPE adapters found!"));\r
- return false;\r
- }\r
-\r
- /* Get adapter name */\r
-\r
- len = sizeof(adaptername);\r
- RegQueryValueEx(adapterkey, (OSTYPE > 4 ? "NetCfgInstanceId" : "ServiceName"), 0, 0, adaptername, &len);\r
-\r
- /* FIXME? cipsrvr checks if the device is in use at this point */\r
-\r
- /* Try to open the corresponding tap device */\r
-\r
- snprintf(tapname, sizeof(tapname), USERMODEDEVICEDIR "%s" TAPSUFFIX, adaptername);\r
- \r
- /* Now we are going to open this device twice: once for reading and once for writing.\r
- We do this because apparently it isn't possible to check for activity in the select() loop.\r
- Furthermore I don't really know how to do it the "Windows" way. */\r
-\r
- if(socketpair(AF_UNIX, SOCK_DGRAM, PF_UNIX, sp)) {\r
- logger(LOG_DEBUG, _("System call `%s' failed: %s"), "socketpair", strerror(errno));\r
- return false;\r
- }\r
-\r
- reader_pid = fork();\r
-\r
- if(reader_pid == -1) {\r
- logger(LOG_DEBUG, _("System call `%s' failed: %s"), "fork", strerror(errno));\r
- return false;\r
- }\r
-\r
- if(!reader_pid) {\r
- /* The child opens the tap device for reading, blocking.\r
- It passes everything it reads to the socket. */\r
- \r
- char buf[MTU];\r
- int lenin;\r
-\r
- handle = CreateFile(tapname, GENERIC_READ, FILE_SHARE_WRITE, 0, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM , 0);\r
-\r
- if(handle == INVALID_HANDLE_VALUE) {\r
- logger(LOG_ERR, _("Could not open CIPE tap device for reading!"));\r
- buf[0] = 0;\r
- write(sp[1], buf, 1);\r
- exit(1);\r
- }\r
-\r
- logger(LOG_DEBUG, _("Tap reader forked and running."));\r
-\r
- /* Notify success */\r
-\r
- buf[0] = 1;\r
- write(sp[1], buf, 1);\r
-\r
- /* Pass packets */\r
-\r
- for(;;) {\r
- ReadFile (handle, buf, MTU, &lenin, NULL);\r
- write(sp[1], buf, lenin);\r
- }\r
- }\r
-\r
- /* The parent opens the tap device for writing. */\r
- \r
- handle = CreateFile(tapname, GENERIC_WRITE, FILE_SHARE_READ, 0, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM , 0);\r
- \r
- if(handle == INVALID_HANDLE_VALUE) {\r
- logger(LOG_ERR, _("Could not open CIPE tap device for writing!"));\r
- return false;\r
- }\r
-\r
- device_fd = sp[0];\r
-\r
- /* Get MAC address from tap device */\r
-\r
- if(routing_mode == RMODE_ROUTER) {\r
- DeviceIoControl (handle, CIPE_IOCTL_GET_MAC, mymac.x, sizeof(mymac.x), mymac.x, sizeof(mymac.x), &len, 0);\r
- overwrite_mac = 1;\r
- }\r
-\r
- read(device_fd, &gelukt, 1);\r
- if(gelukt != 1) {\r
- logger(LOG_DEBUG, "Tap reader failed!");\r
- return false;\r
- }\r
-\r
- if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))\r
- iface = device;\r
-\r
- device_info = _("Cygwin CIPE device");\r
-\r
- logger(LOG_INFO, _("%s is a %s"), device, device_info);\r
-\r
- return true;\r
-}\r
-\r
-void close_device(void)\r
-{\r
- cp();\r
-\r
- close(sp[0]);\r
- close(sp[1]);\r
- CloseHandle(handle);\r
-\r
- kill(reader_pid, SIGKILL);\r
-}\r
-\r
-bool read_packet(vpn_packet_t *packet)\r
-{\r
- int lenin;\r
-\r
- cp();\r
-\r
- if((lenin = read(sp[0], packet->data, MTU)) <= 0) {\r
- logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,\r
- device, strerror(errno));\r
- return false;\r
- }\r
- \r
- packet->len = lenin;\r
-\r
- device_total_in += packet->len;\r
-\r
- ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Read packet of %d bytes from %s"), packet->len,\r
- device_info);\r
-\r
- return true;\r
-}\r
-\r
-bool write_packet(vpn_packet_t *packet)\r
-{\r
- int lenout;\r
-\r
- cp();\r
-\r
- ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"),\r
- packet->len, device_info);\r
-\r
- if(!WriteFile (handle, packet->data, packet->len, &lenout, NULL)) {\r
- logger(LOG_ERR, "Error while writing to %s %s", device_info, device);\r
- return false;\r
- }\r
-\r
- device_total_out += packet->len;\r
-\r
- return true;\r
-}\r
-\r
-void dump_device_stats(void)\r
-{\r
- cp();\r
-\r
- logger(LOG_DEBUG, _("Statistics for %s %s:"), device_info, device);\r
- logger(LOG_DEBUG, _(" total bytes in: %10d"), device_total_in);\r
- logger(LOG_DEBUG, _(" total bytes out: %10d"), device_total_out);\r
-}\r
+/*
+ device.c -- Interaction with Windows tap driver in a MinGW environment
+ Copyright (C) 2002-2005 Ivo Timmermans,
+ 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
+ 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 "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;
+OVERLAPPED r_overlapped;
+OVERLAPPED w_overlapped;
+
+static DWORD WINAPI tapreader(void *bla) {
+ int status;
+ DWORD len;
+ vpn_packet_t packet;
+ int errors = 0;
+
+ logger(LOG_DEBUG, "Tap reader running");
+
+ /* Read from tap device and send to parent */
+
+ r_overlapped.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
+
+ for(;;) {
+ ResetEvent(r_overlapped.hEvent);
+
+ status = ReadFile(device_handle, packet.data, MTU, &len, &r_overlapped);
+
+ if(!status) {
+ if(GetLastError() == ERROR_IO_PENDING) {
+ WaitForSingleObject(r_overlapped.hEvent, INFINITE);
+ if(!GetOverlappedResult(device_handle, &r_overlapped, &len, FALSE))
+ continue;
+ } else {
+ logger(LOG_ERR, "Error while reading from %s %s: %s", device_info,
+ device, strerror(errno));
+ errors++;
+ if(errors >= 10) {
+ EnterCriticalSection(&mutex);
+ running = false;
+ LeaveCriticalSection(&mutex);
+ }
+ usleep(1000000);
+ continue;
+ }
+ }
+
+ errors = 0;
+ packet.len = len;
+ packet.priority = 0;
+
+ EnterCriticalSection(&mutex);
+ route(myself, &packet);
+ LeaveCriticalSection(&mutex);
+ }
+
+ return 0;
+}
+
+static bool setup_device(void) {
+ HKEY key, key2;
+ int i;
+
+ char regpath[1024];
+ char adapterid[1024];
+ char adaptername[1024];
+ char tapname[1024];
+ DWORD 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);
+
+ 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 */
+
+ 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, (LPBYTE)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;
+ }
+
+ /* Create overlapped events for tap I/O */
+
+ r_overlapped.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
+ w_overlapped.hEvent = CreateEvent(NULL, TRUE, TRUE, NULL);
+
+ /* 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) {
+ DWORD lenout;
+ static vpn_packet_t queue;
+
+ ifdebug(TRAFFIC) logger(LOG_DEBUG, "Writing packet of %d bytes to %s",
+ packet->len, device_info);
+
+ /* Check if there is something in progress */
+
+ if(queue.len) {
+ DWORD size;
+ BOOL success = GetOverlappedResult(device_handle, &w_overlapped, &size, FALSE);
+ if(success) {
+ ResetEvent(&w_overlapped);
+ queue.len = 0;
+ } else {
+ int err = GetLastError();
+ if(err != ERROR_IO_INCOMPLETE) {
+ ifdebug(TRAFFIC) logger(LOG_DEBUG, "Error completing previously queued write: %s", winerror(err));
+ ResetEvent(&w_overlapped);
+ queue.len = 0;
+ } else {
+ ifdebug(TRAFFIC) logger(LOG_DEBUG, "Previous overlapped write still in progress");
+ // drop this packet
+ return true;
+ }
+ }
+ }
+
+ /* Otherwise, try to write. */
+
+ memcpy(queue.data, packet->data, packet->len);
+
+ if(!WriteFile(device_handle, queue.data, packet->len, &lenout, &w_overlapped)) {
+ int err = GetLastError();
+ if(err != ERROR_IO_PENDING) {
+ logger(LOG_ERR, "Error while writing to %s %s: %s", device_info, device, winerror(err));
+ return false;
+ }
+ // Write is being done asynchronously.
+ queue.len = packet->len;
+ } else {
+ // Write was completed immediately.
+ ResetEvent(&w_overlapped);
+ }
+
+ 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,
+};
projects / tinc / blobdiff