/*
device.c -- Interaction with Linux ethertap and tun/tap device
- Copyright (C) 2001-2002 Ivo Timmermans <ivo@o2w.nl>,
- 2001-2002 Guus Sliepen <guus@sliepen.eu.org>
+ Copyright (C) 2001-2003 Ivo Timmermans <ivo@o2w.nl>,
+ 2001-2003 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
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id: device.c,v 1.1.2.14 2003/06/11 19:09:52 guus Exp $
+ $Id: device.c,v 1.1.2.19 2003/07/18 13:41:36 guus Exp $
*/
-#include "config.h"
-
-#include <stdio.h>
-#include <errno.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <net/if.h>
-#include <unistd.h>
-#include <syslog.h>
-#include <string.h>
-#include <sys/ioctl.h>
+#include "system.h"
#ifdef HAVE_TUNTAP
#ifdef LINUX_IF_TUN_H
#define DEFAULT_DEVICE "/dev/tap0"
#endif
-#include <utils.h>
#include "conf.h"
+#include "logger.h"
#include "net.h"
-#include "subnet.h"
#include "route.h"
-
-#include "system.h"
+#include "utils.h"
enum {
DEVICE_TYPE_ETHERTAP,
int device_fd = -1;
int device_type;
char *device;
-char *interface;
+char *iface;
char ifrname[IFNAMSIZ];
char *device_info;
int device_total_in = 0;
int device_total_out = 0;
-extern subnet_t mymac;
-
-/*
- open the local ethertap device
-*/
int setup_device(void)
{
struct ifreq ifr;
if(!get_config_string(lookup_config(config_tree, "Device"), &device))
device = DEFAULT_DEVICE;
- if(!get_config_string(lookup_config(config_tree, "Interface"), &interface))
+ if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
#ifdef HAVE_TUNTAP
- interface = netname;
+ iface = netname;
#else
- interface = rindex(device, '/') ? rindex(device, '/') + 1 : device;
+ iface = rindex(device, '/') ? rindex(device, '/') + 1 : device;
#endif
device_fd = open(device, O_RDWR | O_NONBLOCK);
if(device_fd < 0) {
- syslog(LOG_ERR, _("Could not open %s: %s"), device, strerror(errno));
+ logger(LOG_ERR, _("Could not open %s: %s"), device, strerror(errno));
return -1;
}
- /* Set default MAC address for ethertap devices */
- mymac.type = SUBNET_MAC;
- mymac.net.mac.address.x[0] = 0xfe;
- mymac.net.mac.address.x[1] = 0xfd;
- mymac.net.mac.address.x[2] = 0x00;
- mymac.net.mac.address.x[3] = 0x00;
- mymac.net.mac.address.x[4] = 0x00;
- mymac.net.mac.address.x[5] = 0x00;
-
#ifdef HAVE_TUNTAP
/* Ok now check if this is an old ethertap or a new tun/tap thingie */
device_info = _("Linux tun/tap device (tap mode)");
}
- if(interface)
- strncpy(ifr.ifr_name, interface, IFNAMSIZ);
+ if(iface)
+ strncpy(ifr.ifr_name, iface, IFNAMSIZ);
if(!ioctl(device_fd, TUNSETIFF, (void *) &ifr)) {
strncpy(ifrname, ifr.ifr_name, IFNAMSIZ);
- interface = ifrname;
+ iface = ifrname;
} else if(!ioctl(device_fd, (('T' << 8) | 202), (void *) &ifr)) {
- syslog(LOG_WARNING, _("Old ioctl() request was needed for %s"), device);
+ logger(LOG_WARNING, _("Old ioctl() request was needed for %s"), device);
strncpy(ifrname, ifr.ifr_name, IFNAMSIZ);
- interface = ifrname;
+ iface = ifrname;
} else
#endif
{
+ if(routing_mode == RMODE_ROUTER)
+ overwrite_mac = 1;
device_info = _("Linux ethertap device");
device_type = DEVICE_TYPE_ETHERTAP;
- interface = rindex(device, '/') ? rindex(device, '/') + 1 : device;
+ iface = rindex(device, '/') ? rindex(device, '/') + 1 : device;
}
- syslog(LOG_INFO, _("%s is a %s"), device, device_info);
+ logger(LOG_INFO, _("%s is a %s"), device, device_info);
return 0;
}
close(device_fd);
}
-/*
- read, encrypt and send data that is
- available through the ethertap device
-*/
int read_packet(vpn_packet_t *packet)
{
int lenin;
lenin = read(device_fd, packet->data + 10, MTU - 10);
if(lenin <= 0) {
- syslog(LOG_ERR, _("Error while reading from %s %s: %s"),
+ logger(LOG_ERR, _("Error while reading from %s %s: %s"),
device_info, device, strerror(errno));
return -1;
}
lenin = read(device_fd, packet->data, MTU);
if(lenin <= 0) {
- syslog(LOG_ERR, _("Error while reading from %s %s: %s"),
+ logger(LOG_ERR, _("Error while reading from %s %s: %s"),
device_info, device, strerror(errno));
return -1;
}
lenin = read(device_fd, packet->data - 2, MTU + 2);
if(lenin <= 0) {
- syslog(LOG_ERR, _("Error while reading from %s %s: %s"),
+ logger(LOG_ERR, _("Error while reading from %s %s: %s"),
device_info, device, strerror(errno));
return -1;
}
device_total_in += packet->len;
- if(debug_lvl >= DEBUG_TRAFFIC) {
- syslog(LOG_DEBUG, _("Read packet of %d bytes from %s"), packet->len,
+ ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Read packet of %d bytes from %s"), packet->len,
device_info);
- }
return 0;
}
{
cp();
- if(debug_lvl >= DEBUG_TRAFFIC)
- syslog(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
+ ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
packet->len, device_info);
switch(device_type) {
case DEVICE_TYPE_TUN:
packet->data[10] = packet->data[11] = 0;
if(write(device_fd, packet->data + 10, packet->len - 10) < 0) {
- syslog(LOG_ERR, _("Can't write to %s %s: %s"), device_info, device,
+ logger(LOG_ERR, _("Can't write to %s %s: %s"), device_info, device,
strerror(errno));
return -1;
}
break;
case DEVICE_TYPE_TAP:
if(write(device_fd, packet->data, packet->len) < 0) {
- syslog(LOG_ERR, _("Can't write to %s %s: %s"), device_info, device,
+ logger(LOG_ERR, _("Can't write to %s %s: %s"), device_info, device,
strerror(errno));
return -1;
}
*(short int *)(packet->data - 2) = packet->len;
if(write(device_fd, packet->data - 2, packet->len + 2) < 0) {
- syslog(LOG_ERR, _("Can't write to %s %s: %s"), device_info, device,
+ logger(LOG_ERR, _("Can't write to %s %s: %s"), device_info, device,
strerror(errno));
return -1;
}
{
cp();
- syslog(LOG_DEBUG, _("Statistics for %s %s:"), device_info, device);
- syslog(LOG_DEBUG, _(" total bytes in: %10d"), device_total_in);
- syslog(LOG_DEBUG, _(" total bytes out: %10d"), device_total_out);
+ 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);
}
projects / tinc / blobdiff