3 Copyright (C) 2002-2005 Ivo Timmermans,
4 2002-2009 Guus Sliepen <guus@tinc-vpn.org>
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License along
17 with this program; if not, write to the Free Software Foundation, Inc.,
18 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
23 #include <netpacket/packet.h>
35 static char ifrname[IFNAMSIZ];
36 static char *device_info;
38 static int device_total_in = 0;
39 static int device_total_out = 0;
41 bool setup_device(void) {
43 struct sockaddr_ll sa;
47 if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
48 iface = xstrdup("eth0");
50 if(!get_config_string(lookup_config(config_tree, "Device"), &device))
51 device = xstrdup(iface);
53 device_info = _("raw socket");
55 if((device_fd = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL))) < 0) {
56 logger(LOG_ERR, _("Could not open %s: %s"), device_info,
61 memset(&ifr, 0, sizeof(ifr));
62 strncpy(ifr.ifr_ifrn.ifrn_name, iface, IFNAMSIZ);
63 if(ioctl(device_fd, SIOCGIFINDEX, &ifr)) {
65 logger(LOG_ERR, _("Can't find interface %s: %s"), iface,
70 memset(&sa, '0', sizeof(sa));
71 sa.sll_family = AF_PACKET;
72 sa.sll_protocol = htons(ETH_P_ALL);
73 sa.sll_ifindex = ifr.ifr_ifindex;
75 if(bind(device_fd, (struct sockaddr *) &sa, (socklen_t) sizeof(sa))) {
76 logger(LOG_ERR, _("Could not bind %s to %s: %s"), device, iface, strerror(errno));
80 logger(LOG_INFO, _("%s is a %s"), device, device_info);
85 void close_device(void) {
94 bool read_packet(vpn_packet_t *packet) {
99 if((lenin = read(device_fd, packet->data, MTU)) <= 0) {
100 logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
101 device, strerror(errno));
107 device_total_in += packet->len;
109 ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Read packet of %d bytes from %s"), packet->len,
115 bool write_packet(vpn_packet_t *packet) {
118 ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
119 packet->len, device_info);
121 if(write(device_fd, packet->data, packet->len) < 0) {
122 logger(LOG_ERR, _("Can't write to %s %s: %s"), device_info, device,
127 device_total_out += packet->len;
132 void dump_device_stats(void) {
135 logger(LOG_DEBUG, _("Statistics for %s %s:"), device_info, device);
136 logger(LOG_DEBUG, _(" total bytes in: %10d"), device_total_in);
137 logger(LOG_DEBUG, _(" total bytes out: %10d"), device_total_out);