/*
device.c -- Interaction with Linux ethertap and tun/tap device
- Copyright (C) 2001-2004 Ivo Timmermans <ivo@tinc-vpn.org>,
- 2001-2004 Guus Sliepen <guus@tinc-vpn.org>
+ Copyright (C) 2001-2005 Ivo Timmermans,
+ 2001-2009 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"
-#ifdef HAVE_TUNTAP
-#ifdef LINUX_IF_TUN_H
-#include LINUX_IF_TUN_H
-#else
+#ifdef HAVE_LINUX_IF_TUN_H
#include <linux/if_tun.h>
-#endif
#define DEFAULT_DEVICE "/dev/net/tun"
#else
#define DEFAULT_DEVICE "/dev/tap0"
#include "net.h"
#include "route.h"
#include "utils.h"
+#include "xalloc.h"
typedef enum device_type_t {
DEVICE_TYPE_ETHERTAP,
int device_fd = -1;
static device_type_t device_type;
-char *device;
-char *iface;
-char ifrname[IFNAMSIZ];
-char *device_info;
+char *device = NULL;
+char *iface = NULL;
+static char ifrname[IFNAMSIZ];
+static char *device_info;
static int device_total_in = 0;
static int device_total_out = 0;
-bool setup_device(void)
-{
+bool setup_device(void) {
struct ifreq ifr;
cp();
if(!get_config_string(lookup_config(config_tree, "Device"), &device))
- device = DEFAULT_DEVICE;
+ device = xstrdup(DEFAULT_DEVICE);
if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
-#ifdef HAVE_TUNTAP
- iface = netname;
+#ifdef HAVE_LINUX_IF_TUN_H
+ if (netname != NULL)
+ iface = xstrdup(netname);
#else
- iface = rindex(device, '/') ? rindex(device, '/') + 1 : device;
+ iface = xstrdup(rindex(device, '/') ? rindex(device, '/') + 1 : device);
#endif
device_fd = open(device, O_RDWR | O_NONBLOCK);
return false;
}
-#ifdef HAVE_TUNTAP
+#ifdef HAVE_LINUX_IF_TUN_H
/* Ok now check if this is an old ethertap or a new tun/tap thingie */
memset(&ifr, 0, sizeof(ifr));
if(!ioctl(device_fd, TUNSETIFF, &ifr)) {
strncpy(ifrname, ifr.ifr_name, IFNAMSIZ);
- iface = ifrname;
+ if(iface) free(iface);
+ iface = xstrdup(ifrname);
} else if(!ioctl(device_fd, (('T' << 8) | 202), &ifr)) {
logger(LOG_WARNING, _("Old ioctl() request was needed for %s"), device);
strncpy(ifrname, ifr.ifr_name, IFNAMSIZ);
- iface = ifrname;
+ if(iface) free(iface);
+ iface = xstrdup(ifrname);
} else
#endif
{
overwrite_mac = true;
device_info = _("Linux ethertap device");
device_type = DEVICE_TYPE_ETHERTAP;
- iface = rindex(device, '/') ? rindex(device, '/') + 1 : device;
+ if(iface)
+ free(iface);
+ iface = xstrdup(rindex(device, '/') ? rindex(device, '/') + 1 : device);
}
logger(LOG_INFO, _("%s is a %s"), device, device_info);
return true;
}
-void close_device(void)
-{
+void close_device(void) {
cp();
close(device_fd);
+
+ free(device);
+ free(iface);
}
-bool read_packet(vpn_packet_t *packet)
-{
+bool read_packet(vpn_packet_t *packet) {
int lenin;
cp();
return true;
}
-bool write_packet(vpn_packet_t *packet)
-{
+bool write_packet(vpn_packet_t *packet) {
cp();
ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
return true;
}
-void dump_device_stats(void)
-{
+void dump_device_stats(void) {
cp();
logger(LOG_DEBUG, _("Statistics for %s %s:"), device_info, device);