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;
45 if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
46 iface = xstrdup("eth0");
48 if(!get_config_string(lookup_config(config_tree, "Device"), &device))
49 device = xstrdup(iface);
51 device_info = "raw socket";
53 if((device_fd = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL))) < 0) {
54 logger(LOG_ERR, "Could not open %s: %s", device_info,
59 memset(&ifr, 0, sizeof(ifr));
60 strncpy(ifr.ifr_ifrn.ifrn_name, iface, IFNAMSIZ);
61 if(ioctl(device_fd, SIOCGIFINDEX, &ifr)) {
63 logger(LOG_ERR, "Can't find interface %s: %s", iface,
68 memset(&sa, '0', sizeof(sa));
69 sa.sll_family = AF_PACKET;
70 sa.sll_protocol = htons(ETH_P_ALL);
71 sa.sll_ifindex = ifr.ifr_ifindex;
73 if(bind(device_fd, (struct sockaddr *) &sa, (socklen_t) sizeof(sa))) {
74 logger(LOG_ERR, "Could not bind %s to %s: %s", device, iface, strerror(errno));
78 logger(LOG_INFO, "%s is a %s", device, device_info);
83 void close_device(void) {
90 bool read_packet(vpn_packet_t *packet) {
93 if((lenin = read(device_fd, packet->data, MTU)) <= 0) {
94 logger(LOG_ERR, "Error while reading from %s %s: %s", device_info,
95 device, strerror(errno));
101 device_total_in += packet->len;
103 ifdebug(TRAFFIC) logger(LOG_DEBUG, "Read packet of %d bytes from %s", packet->len,
109 bool write_packet(vpn_packet_t *packet) {
110 ifdebug(TRAFFIC) logger(LOG_DEBUG, "Writing packet of %d bytes to %s",
111 packet->len, device_info);
113 if(write(device_fd, packet->data, packet->len) < 0) {
114 logger(LOG_ERR, "Can't write to %s %s: %s", device_info, device,
119 device_total_out += packet->len;
124 void dump_device_stats(void) {
125 logger(LOG_DEBUG, "Statistics for %s %s:", device_info, device);
126 logger(LOG_DEBUG, " total bytes in: %10d", device_total_in);
127 logger(LOG_DEBUG, " total bytes out: %10d", device_total_out);