145 lines
3.4 KiB
C
145 lines
3.4 KiB
C
/*
|
|
device.c -- raw socket
|
|
Copyright (C) 2002-2005 Ivo Timmermans,
|
|
2002-2009 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
|
|
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., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
|
|
$Id$
|
|
*/
|
|
|
|
#include "system.h"
|
|
|
|
#include <netpacket/packet.h>
|
|
|
|
#include "conf.h"
|
|
#include "net.h"
|
|
#include "logger.h"
|
|
#include "utils.h"
|
|
#include "route.h"
|
|
#include "xalloc.h"
|
|
|
|
int device_fd = -1;
|
|
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)
|
|
{
|
|
struct ifreq ifr;
|
|
struct sockaddr_ll sa;
|
|
|
|
cp();
|
|
|
|
if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
|
|
iface = xstrdup("eth0");
|
|
|
|
if(!get_config_string(lookup_config(config_tree, "Device"), &device))
|
|
device = xstrdup(iface);
|
|
|
|
device_info = _("raw socket");
|
|
|
|
if((device_fd = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL))) < 0) {
|
|
logger(LOG_ERR, _("Could not open %s: %s"), device_info,
|
|
strerror(errno));
|
|
return false;
|
|
}
|
|
|
|
memset(&ifr, 0, sizeof(ifr));
|
|
strncpy(ifr.ifr_ifrn.ifrn_name, iface, IFNAMSIZ);
|
|
if(ioctl(device_fd, SIOCGIFINDEX, &ifr)) {
|
|
close(device_fd);
|
|
logger(LOG_ERR, _("Can't find interface %s: %s"), iface,
|
|
strerror(errno));
|
|
return false;
|
|
}
|
|
|
|
memset(&sa, '0', sizeof(sa));
|
|
sa.sll_family = AF_PACKET;
|
|
sa.sll_protocol = htons(ETH_P_ALL);
|
|
sa.sll_ifindex = ifr.ifr_ifindex;
|
|
|
|
if(bind(device_fd, (struct sockaddr *) &sa, (socklen_t) sizeof(sa))) {
|
|
logger(LOG_ERR, _("Could not bind %s to %s: %s"), device, iface, strerror(errno));
|
|
return false;
|
|
}
|
|
|
|
logger(LOG_INFO, _("%s is a %s"), device, device_info);
|
|
|
|
return true;
|
|
}
|
|
|
|
void close_device(void)
|
|
{
|
|
cp();
|
|
|
|
close(device_fd);
|
|
|
|
free(device);
|
|
free(iface);
|
|
}
|
|
|
|
bool read_packet(vpn_packet_t *packet)
|
|
{
|
|
int lenin;
|
|
|
|
cp();
|
|
|
|
if((lenin = read(device_fd, packet->data, MTU)) <= 0) {
|
|
logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
|
|
device, strerror(errno));
|
|
return false;
|
|
}
|
|
|
|
packet->len = lenin;
|
|
|
|
device_total_in += packet->len;
|
|
|
|
ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Read packet of %d bytes from %s"), packet->len,
|
|
device_info);
|
|
|
|
return true;
|
|
}
|
|
|
|
bool write_packet(vpn_packet_t *packet)
|
|
{
|
|
cp();
|
|
|
|
ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
|
|
packet->len, device_info);
|
|
|
|
if(write(device_fd, packet->data, packet->len) < 0) {
|
|
logger(LOG_ERR, _("Can't write to %s %s: %s"), device_info, device,
|
|
strerror(errno));
|
|
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);
|
|
}
|