3 Copyright (C) 2002-2005 Ivo Timmermans,
4 2002-2011 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>
33 static char *device_info;
35 static uint64_t device_total_in = 0;
36 static uint64_t device_total_out = 0;
38 static bool setup_device(void) {
40 struct sockaddr_ll sa;
42 if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
43 iface = xstrdup("eth0");
45 if(!get_config_string(lookup_config(config_tree, "Device"), &device))
46 device = xstrdup(iface);
48 device_info = "raw socket";
50 if((device_fd = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL))) < 0) {
51 logger(LOG_ERR, "Could not open %s: %s", device_info,
56 memset(&ifr, 0, sizeof(ifr));
57 strncpy(ifr.ifr_ifrn.ifrn_name, iface, IFNAMSIZ);
58 if(ioctl(device_fd, SIOCGIFINDEX, &ifr)) {
60 logger(LOG_ERR, "Can't find interface %s: %s", iface,
65 memset(&sa, '0', sizeof(sa));
66 sa.sll_family = AF_PACKET;
67 sa.sll_protocol = htons(ETH_P_ALL);
68 sa.sll_ifindex = ifr.ifr_ifindex;
70 if(bind(device_fd, (struct sockaddr *) &sa, (socklen_t) sizeof(sa))) {
71 logger(LOG_ERR, "Could not bind %s to %s: %s", device, iface, strerror(errno));
75 logger(LOG_INFO, "%s is a %s", device, device_info);
80 static void close_device(void) {
87 static bool read_packet(vpn_packet_t *packet) {
90 if((lenin = read(device_fd, packet->data, MTU)) <= 0) {
91 logger(LOG_ERR, "Error while reading from %s %s: %s", device_info,
92 device, strerror(errno));
98 device_total_in += packet->len;
100 ifdebug(TRAFFIC) logger(LOG_DEBUG, "Read packet of %d bytes from %s", packet->len,
106 static bool write_packet(vpn_packet_t *packet) {
107 ifdebug(TRAFFIC) logger(LOG_DEBUG, "Writing packet of %d bytes to %s",
108 packet->len, device_info);
110 if(write(device_fd, packet->data, packet->len) < 0) {
111 logger(LOG_ERR, "Can't write to %s %s: %s", device_info, device,
116 device_total_out += packet->len;
121 static void dump_device_stats(void) {
122 logger(LOG_DEBUG, "Statistics for %s %s:", device_info, device);
123 logger(LOG_DEBUG, " total bytes in: %10"PRIu64, device_total_in);
124 logger(LOG_DEBUG, " total bytes out: %10"PRIu64, device_total_out);
127 const devops_t raw_socket_devops = {
128 .setup = setup_device,
129 .close = close_device,
131 .write = write_packet,
132 .dump_stats = dump_device_stats,