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
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 #include <netpacket/packet.h>
37 static char ifrname[IFNAMSIZ];
38 static char *device_info;
40 static int device_total_in = 0;
41 static int device_total_out = 0;
43 bool setup_device(void)
46 struct sockaddr_ll sa;
50 if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
51 iface = xstrdup("eth0");
53 if(!get_config_string(lookup_config(config_tree, "Device"), &device))
54 device = xstrdup(iface);
56 device_info = _("raw socket");
58 if((device_fd = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL))) < 0) {
59 logger(LOG_ERR, _("Could not open %s: %s"), device_info,
64 memset(&ifr, 0, sizeof(ifr));
65 strncpy(ifr.ifr_ifrn.ifrn_name, iface, IFNAMSIZ);
66 if(ioctl(device_fd, SIOCGIFINDEX, &ifr)) {
68 logger(LOG_ERR, _("Can't find interface %s: %s"), iface,
73 memset(&sa, '0', sizeof(sa));
74 sa.sll_family = AF_PACKET;
75 sa.sll_protocol = htons(ETH_P_ALL);
76 sa.sll_ifindex = ifr.ifr_ifindex;
78 if(bind(device_fd, (struct sockaddr *) &sa, (socklen_t) sizeof(sa))) {
79 logger(LOG_ERR, _("Could not bind %s to %s: %s"), device, iface, strerror(errno));
83 logger(LOG_INFO, _("%s is a %s"), device, device_info);
88 void close_device(void)
98 bool read_packet(vpn_packet_t *packet)
104 if((lenin = read(device_fd, packet->data, MTU)) <= 0) {
105 logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
106 device, strerror(errno));
112 device_total_in += packet->len;
114 ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Read packet of %d bytes from %s"), packet->len,
120 bool write_packet(vpn_packet_t *packet)
124 ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
125 packet->len, device_info);
127 if(write(device_fd, packet->data, packet->len) < 0) {
128 logger(LOG_ERR, _("Can't write to %s %s: %s"), device_info, device,
133 device_total_out += packet->len;
138 void dump_device_stats(void)
142 logger(LOG_DEBUG, _("Statistics for %s %s:"), device_info, device);
143 logger(LOG_DEBUG, _(" total bytes in: %10d"), device_total_in);
144 logger(LOG_DEBUG, _(" total bytes out: %10d"), device_total_out);