3 Copyright (C) 2002-2005 Ivo Timmermans,
4 2002-2012 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 #ifdef HAVE_NETPACKET_PACKET_H
24 #include <netpacket/packet.h>
35 #if defined(PF_PACKET) && defined(ETH_P_ALL) && defined(AF_PACKET) && defined(SIOCGIFINDEX)
36 static const char *device_info = "raw_socket";
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");
46 if(!get_config_string(lookup_config(config_tree, "Device"), &device)) {
47 device = xstrdup(iface);
50 if((device_fd = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL))) < 0) {
51 logger(DEBUG_ALWAYS, LOG_ERR, "Could not open %s: %s", device_info,
56 memset(&ifr, 0, sizeof(ifr));
59 fcntl(device_fd, F_SETFD, FD_CLOEXEC);
62 strncpy(ifr.ifr_ifrn.ifrn_name, iface, IFNAMSIZ);
63 ifr.ifr_ifrn.ifrn_name[IFNAMSIZ - 1] = 0;
65 if(ioctl(device_fd, SIOCGIFINDEX, &ifr)) {
67 logger(DEBUG_ALWAYS, LOG_ERR, "Can't find interface %s: %s", iface,
72 memset(&sa, '0', sizeof(sa));
73 sa.sll_family = AF_PACKET;
74 sa.sll_protocol = htons(ETH_P_ALL);
75 sa.sll_ifindex = ifr.ifr_ifindex;
77 if(bind(device_fd, (struct sockaddr *) &sa, (socklen_t) sizeof(sa))) {
78 logger(DEBUG_ALWAYS, LOG_ERR, "Could not bind %s to %s: %s", device, iface, strerror(errno));
82 logger(DEBUG_ALWAYS, LOG_INFO, "%s is a %s", device, device_info);
87 static void close_device(void) {
98 static bool read_packet(vpn_packet_t *packet) {
101 if((inlen = read(device_fd, DATA(packet), MTU)) <= 0) {
102 logger(DEBUG_ALWAYS, LOG_ERR, "Error while reading from %s %s: %s", device_info,
103 device, strerror(errno));
109 logger(DEBUG_TRAFFIC, LOG_DEBUG, "Read packet of %d bytes from %s", packet->len,
115 static bool write_packet(vpn_packet_t *packet) {
116 logger(DEBUG_TRAFFIC, LOG_DEBUG, "Writing packet of %d bytes to %s",
117 packet->len, device_info);
119 if(write(device_fd, DATA(packet), packet->len) < 0) {
120 logger(DEBUG_ALWAYS, LOG_ERR, "Can't write to %s %s: %s", device_info, device,
128 const devops_t raw_socket_devops = {
129 .setup = setup_device,
130 .close = close_device,
132 .write = write_packet,
137 static bool not_supported(void) {
138 logger(DEBUG_ALWAYS, LOG_ERR, "Raw socket device not supported on this platform");
142 const devops_t raw_socket_devops = {
143 .setup = not_supported,