/*
device.c -- Interaction with Windows tap driver in a MinGW environment
- Copyright (C) 2002-2004 Ivo Timmermans <ivo@tinc-vpn.org>,
- 2002-2004 Guus Sliepen <guus@tinc-vpn.org>
+ Copyright (C) 2002-2005 Ivo Timmermans,
+ 2002-2014 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
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.
-
- $Id$
+ 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 "../system.h"
#include <windows.h>
#include <winioctl.h>
-#include "conf.h"
-#include "logger.h"
-#include "net.h"
-#include "route.h"
-#include "utils.h"
-#include "xalloc.h"
-
-#define REG_CONTROL_NET "SYSTEM\\CurrentControlSet\\Control\\Network\\{4D36E972-E325-11CE-BFC1-08002BE10318}"
-
-#define USERMODEDEVICEDIR "\\\\.\\"
-#define USERDEVICEDIR "\\??\\"
-#define TAPSUFFIX ".tap"
-
-#define TAP_CONTROL_CODE(request,method) CTL_CODE(FILE_DEVICE_PHYSICAL_NETCARD | 8000, request, method, FILE_ANY_ACCESS)
+#include "../conf.h"
+#include "../device.h"
+#include "../logger.h"
+#include "../net.h"
+#include "../route.h"
+#include "../utils.h"
+#include "../xalloc.h"
-#define TAP_IOCTL_GET_LASTMAC TAP_CONTROL_CODE(0, METHOD_BUFFERED)
-#define TAP_IOCTL_GET_MAC TAP_CONTROL_CODE(1, METHOD_BUFFERED)
-#define TAP_IOCTL_SET_STATISTICS TAP_CONTROL_CODE(2, METHOD_BUFFERED)
-#define TAP_IOCTL_GET_VERSION TAP_CONTROL_CODE(3, METHOD_BUFFERED)
-#define TAP_IOCTL_GET_MTU TAP_CONTROL_CODE(4, METHOD_BUFFERED)
-#define TAP_IOCTL_GET_INFO TAP_CONTROL_CODE(5, METHOD_BUFFERED)
-#define TAP_IOCTL_CONFIG_POINT_TO_POINT TAP_CONTROL_CODE(6, METHOD_BUFFERED)
-#define TAP_IOCTL_SET_MEDIA_STATUS TAP_CONTROL_CODE(7, METHOD_BUFFERED)
+#include "common.h"
-
-int device_fd = 0;
-HANDLE device_handle = INVALID_HANDLE_VALUE;
+int device_fd = -1;
+static HANDLE device_handle = INVALID_HANDLE_VALUE;
char *device = NULL;
char *iface = NULL;
-char *device_info = NULL;
+static char *device_info = NULL;
-int device_total_in = 0;
-int device_total_out = 0;
+static uint64_t device_total_in = 0;
+static uint64_t device_total_out = 0;
extern char *myport;
+OVERLAPPED r_overlapped;
+OVERLAPPED w_overlapped;
-DWORD WINAPI tapreader(void *bla) {
- int sock, err, status;
- struct addrinfo *ai;
- struct addrinfo hint = {
- .ai_family = AF_UNSPEC,
- .ai_socktype = SOCK_DGRAM,
- .ai_protocol = IPPROTO_UDP,
- .ai_flags = 0,
- };
- char buf[MTU];
- long len;
- OVERLAPPED overlapped;
-
- /* Open a socket to the parent process */
-
- err = getaddrinfo(NULL, myport, &hint, &ai);
-
- if(err || !ai) {
- logger(LOG_ERR, _("System call `%s' failed: %s"), "getaddrinfo", gai_strerror(errno));
- return -1;
- }
-
- sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
+static DWORD WINAPI tapreader(void *bla) {
+ int status;
+ DWORD len;
+ vpn_packet_t packet;
+ int errors = 0;
- freeaddrinfo(ai);
-
- if(sock < 0) {
- logger(LOG_ERR, _("System call `%s' failed: %s"), "socket", strerror(errno));
- return -1;
- }
-
- if(connect(sock, ai->ai_addr, ai->ai_addrlen)) {
- logger(LOG_ERR, _("System call `%s' failed: %s"), "connect", strerror(errno));
- return -1;
- }
-
- logger(LOG_DEBUG, _("Tap reader running"));
+ logger(LOG_DEBUG, "Tap reader running");
/* Read from tap device and send to parent */
- overlapped.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
-
+ r_overlapped.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
+
for(;;) {
- overlapped.Offset = 0;
- overlapped.OffsetHigh = 0;
- ResetEvent(overlapped.hEvent);
+ ResetEvent(r_overlapped.hEvent);
- status = ReadFile(device_handle, buf, sizeof(buf), &len, &overlapped);
+ status = ReadFile(device_handle, packet.data, MTU, &len, &r_overlapped);
if(!status) {
if(GetLastError() == ERROR_IO_PENDING) {
- WaitForSingleObject(overlapped.hEvent, INFINITE);
- if(!GetOverlappedResult(device_handle, &overlapped, &len, FALSE))
+ 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,
+ logger(LOG_ERR, "Error while reading from %s %s: %s", device_info,
device, strerror(errno));
- return -1;
+ errors++;
+ if(errors >= 10) {
+ EnterCriticalSection(&mutex);
+ running = false;
+ LeaveCriticalSection(&mutex);
+ }
+ usleep(1000000);
+ continue;
}
}
- if(send(sock, buf, len, 0) <= 0)
- return -1;
+ errors = 0;
+ packet.len = len;
+ packet.priority = 0;
+
+ EnterCriticalSection(&mutex);
+ route(myself, &packet);
+ LeaveCriticalSection(&mutex);
}
+
+ return 0;
}
-bool setup_device(void)
-{
+static bool setup_device(void) {
HKEY key, key2;
int i;
char adapterid[1024];
char adaptername[1024];
char tapname[1024];
- long len;
+ DWORD len;
unsigned long status;
bool found = false;
- int sock, err;
+ int err;
HANDLE thread;
- struct addrinfo *ai;
- struct addrinfo hint = {
- .ai_family = AF_UNSPEC,
- .ai_socktype = SOCK_DGRAM,
- .ai_protocol = IPPROTO_UDP,
- .ai_flags = 0,
- };
-
- cp();
-
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, REG_CONTROL_NET, 0, KEY_READ, &key)) {
- logger(LOG_ERR, _("Unable to read registry: %s"), winerror(GetLastError()));
+ if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, NETWORK_CONNECTIONS_KEY, 0, KEY_READ, &key)) {
+ logger(LOG_ERR, "Unable to read registry: %s", winerror(GetLastError()));
return false;
}
/* Find out more about this adapter */
- snprintf(regpath, sizeof(regpath), "%s\\%s\\Connection", REG_CONTROL_NET, adapterid);
+ 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);
+ err = RegQueryValueEx(key2, "Name", 0, 0, (LPBYTE)adaptername, &len);
RegCloseKey(key2);
RegCloseKey(key);
if(!found) {
- logger(LOG_ERR, _("No Windows tap device found!"));
+ logger(LOG_ERR, "No Windows tap device found!");
return false;
}
}
if(device_handle == INVALID_HANDLE_VALUE) {
- logger(LOG_ERR, _("%s (%s) is not a usable Windows tap device: %s"), device, iface, winerror(GetLastError()));
+ 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()));
+ logger(LOG_ERR, "Could not get MAC address from Windows tap device %s (%s): %s", device, iface, winerror(GetLastError()));
return false;
}
overwrite_mac = 1;
}
- /* Create a listening socket */
-
- err = getaddrinfo(NULL, myport, &hint, &ai);
-
- if(err || !ai) {
- logger(LOG_ERR, _("System call `%s' failed: %s"), "getaddrinfo", gai_strerror(errno));
- return false;
- }
-
- sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
-
- if(sock < 0) {
- logger(LOG_ERR, _("System call `%s' failed: %s"), "socket", strerror(errno));
- return false;
- }
-
- if(bind(sock, ai->ai_addr, ai->ai_addrlen)) {
- logger(LOG_ERR, _("System call `%s' failed: %s"), "bind", strerror(errno));
- return false;
- }
+ /* Create overlapped events for tap I/O */
- freeaddrinfo(ai);
-
- if(listen(sock, 1)) {
- logger(LOG_ERR, _("System call `%s' failed: %s"), "listen", strerror(errno));
- return false;
- }
+ 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;
- }
-
- /* Wait for the tap reader to connect back to us */
-
- if((device_fd = accept(sock, NULL, 0)) == -1) {
- logger(LOG_ERR, _("System call `%s' failed: %s"), "accept", strerror(errno));
+ logger(LOG_ERR, "System call `%s' failed: %s", "CreateThread", winerror(GetLastError()));
return false;
}
- closesocket(sock);
-
/* 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");
+ device_info = "Windows tap device";
- logger(LOG_INFO, _("%s (%s) is a %s"), device, iface, device_info);
+ logger(LOG_INFO, "%s (%s) is a %s", device, iface, device_info);
return true;
}
-void close_device(void)
-{
- cp();
-
+static void close_device(void) {
CloseHandle(device_handle);
-}
-
-bool read_packet(vpn_packet_t *packet)
-{
- int lenin;
-
- cp();
- if((lenin = recv(device_fd, packet->data, MTU, 0)) <= 0) {
- logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
- device, strerror(errno));
- return false;
- }
-
- packet->len = lenin;
+ free(device);
+ free(iface);
+}
- device_total_in += packet->len;
+static bool read_packet(vpn_packet_t *packet) {
+ return false;
+}
- ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Read packet of %d bytes from %s"), packet->len,
- device_info);
+static bool write_packet(vpn_packet_t *packet) {
+ DWORD lenout;
+ static vpn_packet_t queue;
- return true;
-}
+ ifdebug(TRAFFIC) logger(LOG_DEBUG, "Writing packet of %d bytes to %s",
+ packet->len, device_info);
-bool write_packet(vpn_packet_t *packet)
-{
- long lenout;
- OVERLAPPED overlapped = {0};
+ /* 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;
+ }
+ }
+ }
- cp();
+ /* Otherwise, try to write. */
- ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
- packet->len, device_info);
+ memcpy(queue.data, packet->data, packet->len);
- 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;
+ 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;
}
-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);
+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 / oweals / tinc.git / blobdiff