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>
36 static char ifrname[IFNAMSIZ];
37 static char *device_info;
39 static uint64_t device_total_in = 0;
40 static uint64_t device_total_out = 0;
42 bool setup_device(void) {
44 struct sockaddr_ll sa;
46 if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
47 iface = xstrdup("eth0");
49 if(!get_config_string(lookup_config(config_tree, "Device"), &device))
50 device = xstrdup(iface);
52 device_info = "raw socket";
54 if((device_fd = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL))) < 0) {
55 logger(LOG_ERR, "Could not open %s: %s", device_info,
60 memset(&ifr, 0, sizeof ifr);
61 strncpy(ifr.ifr_ifrn.ifrn_name, iface, IFNAMSIZ);
62 if(ioctl(device_fd, SIOCGIFINDEX, &ifr)) {
64 logger(LOG_ERR, "Can't find interface %s: %s", iface,
69 memset(&sa, '0', sizeof sa);
70 sa.sll_family = AF_PACKET;
71 sa.sll_protocol = htons(ETH_P_ALL);
72 sa.sll_ifindex = ifr.ifr_ifindex;
74 if(bind(device_fd, (struct sockaddr *) &sa, (socklen_t) sizeof sa)) {
75 logger(LOG_ERR, "Could not bind %s to %s: %s", device, iface, strerror(errno));
79 logger(LOG_INFO, "%s is a %s", device, device_info);
84 void close_device(void) {
91 bool read_packet(vpn_packet_t *packet) {
94 if((inlen = read(device_fd, packet->data, MTU)) <= 0) {
95 logger(LOG_ERR, "Error while reading from %s %s: %s", device_info,
96 device, strerror(errno));
102 device_total_in += packet->len;
104 ifdebug(TRAFFIC) logger(LOG_DEBUG, "Read packet of %d bytes from %s", packet->len,
110 bool write_packet(vpn_packet_t *packet) {
111 ifdebug(TRAFFIC) logger(LOG_DEBUG, "Writing packet of %d bytes to %s",
112 packet->len, device_info);
114 if(write(device_fd, packet->data, packet->len) < 0) {
115 logger(LOG_ERR, "Can't write to %s %s: %s", device_info, device,
120 device_total_out += packet->len;
125 void dump_device_stats(void) {
126 logger(LOG_DEBUG, "Statistics for %s %s:", device_info, device);
127 logger(LOG_DEBUG, " total bytes in: %10"PRIu64, device_total_in);
128 logger(LOG_DEBUG, " total bytes out: %10"PRIu64, device_total_out);