/*
device.c -- Interaction with Windows tap driver in a Cygwin environment
- Copyright (C) 2002-2003 Ivo Timmermans <ivo@o2w.nl>,
- 2002-2003 Guus Sliepen <guus@sliepen.eu.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: device.c,v 1.1.2.16 2003/08/08 19:49:47 guus Exp $
+ 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 <w32api/windows.h>
#include <w32api/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"
+#include "../conf.h"
+#include "../device.h"
+#include "../logger.h"
+#include "../names.h"
+#include "../net.h"
+#include "../route.h"
+#include "../utils.h"
+#include "../xalloc.h"
-#define TAP_CONTROL_CODE(request,method) CTL_CODE(FILE_DEVICE_PHYSICAL_NETCARD | 8000, request, method, FILE_ANY_ACCESS)
-
-#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)
+#include "../mingw/common.h"
int device_fd = -1;
static HANDLE device_handle = INVALID_HANDLE_VALUE;
char *device = NULL;
char *iface = NULL;
-char *device_info = NULL;
-
-int device_total_in = 0;
-int device_total_out = 0;
+static char *device_info = NULL;
-pid_t reader_pid;
-int sp[2];
+static pid_t reader_pid;
+static int sp[2];
-bool setup_device(void)
-{
+static bool setup_device(void) {
HKEY key, key2;
- int i;
+ int i, err;
char regpath[1024];
char adapterid[1024];
bool found = false;
- cp();
-
get_config_string(lookup_config(config_tree, "Device"), &device);
get_config_string(lookup_config(config_tree, "Interface"), &iface);
+ if(device && interface)
+ 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, 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(DEBUG_ALWAYS, LOG_ERR, "Unable to read registry: %s", winerror(GetLastError()));
return false;
}
for (i = 0; ; i++) {
- len = sizeof(adapterid);
+ 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", 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))
+ if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, regpath, 0, KEY_READ, &key2))
continue;
- len = sizeof(adaptername);
+ len = sizeof adaptername;
err = RegQueryValueEx(key2, "Name", 0, 0, adaptername, &len);
RegCloseKey(key2);
continue;
}
- snprintf(tapname, sizeof(tapname), USERMODEDEVICEDIR "%s" TAPSUFFIX, adapterid);
+ 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);
RegCloseKey(key);
if(!found) {
- logger(LOG_ERR, _("No Windows tap device found!"));
+ logger(DEBUG_ALWAYS, LOG_ERR, "No Windows tap device found!");
return false;
}
if(!iface)
iface = xstrdup(adaptername);
- snprintf(tapname, sizeof(tapname), USERMODEDEVICEDIR "%s" TAPSUFFIX, device);
-
+ 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. */
if(socketpair(AF_UNIX, SOCK_DGRAM, PF_UNIX, sp)) {
- logger(LOG_DEBUG, _("System call `%s' failed: %s"), "socketpair", strerror(errno));
+ logger(DEBUG_ALWAYS, LOG_DEBUG, "System call `%s' failed: %s", "socketpair", strerror(errno));
return false;
}
/* The parent opens the tap device for writing. */
-
+
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()));
+ logger(DEBUG_ALWAYS, LOG_ERR, "Could not open Windows tap device %s (%s) for writing: %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()));
+ if(!DeviceIoControl(device_handle, TAP_IOCTL_GET_MAC, mymac.x, sizeof mymac.x, mymac.x, sizeof mymac.x, &len, 0)) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Could not get MAC address from Windows tap device %s (%s): %s", device, iface, winerror(GetLastError()));
return false;
}
reader_pid = fork();
if(reader_pid == -1) {
- logger(LOG_DEBUG, _("System call `%s' failed: %s"), "fork", strerror(errno));
+ logger(DEBUG_ALWAYS, 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];
- long lenin;
+ long inlen;
CloseHandle(device_handle);
device_handle = CreateFile(tapname, GENERIC_READ, FILE_SHARE_WRITE, 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 reading: %s"), device, iface, winerror(GetLastError()));
+ logger(DEBUG_ALWAYS, LOG_ERR, "Could not open Windows tap device %s (%s) for reading: %s", device, iface, winerror(GetLastError()));
buf[0] = 0;
write(sp[1], buf, 1);
exit(1);
}
- logger(LOG_DEBUG, _("Tap reader forked and running."));
+ logger(DEBUG_ALWAYS, LOG_DEBUG, "Tap reader forked and running.");
/* Notify success */
/* Pass packets */
for(;;) {
- ReadFile(device_handle, buf, MTU, &lenin, NULL);
- write(sp[1], buf, lenin);
+ ReadFile(device_handle, buf, MTU, &inlen, NULL);
+ write(sp[1], buf, inlen);
}
}
read(device_fd, &gelukt, 1);
if(gelukt != 1) {
- logger(LOG_DEBUG, _("Tap reader failed!"));
+ logger(DEBUG_ALWAYS, LOG_DEBUG, "Tap reader failed!");
return false;
}
- device_info = _("Windows tap device");
+ 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)
-{
- cp();
-
+static void close_device(void) {
close(sp[0]);
close(sp[1]);
- CloseHandle(device_handle);
+ CloseHandle(device_handle); device_handle = INVALID_HANDLE_VALUE;
kill(reader_pid, SIGKILL);
-}
-bool read_packet(vpn_packet_t *packet)
-{
- int lenin;
+ free(device); device = NULL;
+ free(iface); iface = NULL;
+ device_info = NULL;
+}
- cp();
+static bool read_packet(vpn_packet_t *packet) {
+ int inlen;
- if((lenin = read(sp[0], packet->data, MTU)) <= 0) {
- logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
+ if((inlen = read(sp[0], DATA(packet), MTU)) <= 0) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Error while reading from %s %s: %s", device_info,
device, strerror(errno));
return false;
}
-
- packet->len = lenin;
- device_total_in += packet->len;
+ packet->len = inlen;
- ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Read packet of %d bytes from %s"), packet->len,
+ logger(DEBUG_TRAFFIC, LOG_DEBUG, "Read packet of %d bytes from %s", packet->len,
device_info);
return true;
}
-bool write_packet(vpn_packet_t *packet)
-{
- long lenout;
+static bool write_packet(vpn_packet_t *packet) {
+ long outlen;
- cp();
-
- 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, &lenout, NULL)) {
- logger(LOG_ERR, _("Error while writing to %s %s: %s"), device_info, device, winerror(GetLastError()));
+ if(!WriteFile (device_handle, DATA(packet), packet->len, &outlen, NULL)) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Error while writing to %s %s: %s", device_info, device, winerror(GetLastError()));
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);
-}
+const devops_t os_devops = {
+ .setup = setup_device,
+ .close = close_device,
+ .read = read_packet,
+ .write = write_packet,
+};
projects / tinc / blobdiff