3 Copyright (C) 2002 Ivo Timmermans <ivo@o2w.nl>,
4 2002 Guus Sliepen <guus@sliepen.eu.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.
20 $Id: device.c,v 1.1.2.4 2002/09/10 21:29:42 guus Exp $
27 #include <sys/types.h>
34 #include <sys/ioctl.h>
35 #include <sys/socket.h>
36 #include <netpacket/packet.h>
37 #include <net/ethernet.h>
50 char ifrname[IFNAMSIZ];
53 int device_total_in = 0;
54 int device_total_out = 0;
56 extern subnet_t mymac;
59 open the local ethertap device
61 int setup_device(void)
64 struct sockaddr_ll sa;
69 (lookup_config(config_tree, "Interface"), &interface))
72 if(!get_config_string(lookup_config(config_tree, "Device"), &device))
75 device_info = _("raw socket");
77 if((device_fd = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL))) < 0) {
78 syslog(LOG_ERR, _("Could not open %s: %s"), device_info,
83 memset(&ifr, 0, sizeof(ifr));
84 strncpy(ifr.ifr_ifrn.ifrn_name, interface, IFNAMSIZ);
85 if(ioctl(device_fd, SIOCGIFINDEX, &ifr)) {
87 syslog(LOG_ERR, _("Can't find interface %s: %s"), interface,
92 memset(&sa, '0', sizeof(sa));
93 sa.sll_family = AF_PACKET;
94 sa.sll_protocol = htons(ETH_P_ALL);
95 sa.sll_ifindex = ifr.ifr_ifindex;
97 if(bind(device_fd, (struct sockaddr *) &sa, (socklen_t) sizeof(sa))) {
98 syslog(LOG_ERR, _("Could not bind to %s: %s"), device, strerror(errno));
102 /* Set default MAC address for ethertap devices */
103 mymac.type = SUBNET_MAC;
104 mymac.net.mac.address.x[0] = 0xfe;
105 mymac.net.mac.address.x[1] = 0xfd;
106 mymac.net.mac.address.x[2] = 0x00;
107 mymac.net.mac.address.x[3] = 0x00;
108 mymac.net.mac.address.x[4] = 0x00;
109 mymac.net.mac.address.x[5] = 0x00;
111 syslog(LOG_INFO, _("%s is a %s"), device, device_info);
116 void close_device(void)
124 read, encrypt and send data that is
125 available through the ethertap device
127 int read_packet(vpn_packet_t *packet)
133 if((lenin = read(device_fd, packet->data, MTU)) <= 0) {
134 syslog(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
135 device, strerror(errno));
141 device_total_in += packet->len;
143 if(debug_lvl >= DEBUG_TRAFFIC) {
144 syslog(LOG_DEBUG, _("Read packet of %d bytes from %s"), packet->len,
151 int write_packet(vpn_packet_t *packet)
155 if(debug_lvl >= DEBUG_TRAFFIC)
156 syslog(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
157 packet->len, device_info);
159 if(write(device_fd, packet->data, packet->len) < 0) {
160 syslog(LOG_ERR, _("Can't write to %s %s: %s"), device_info, device,
165 device_total_out += packet->len;
170 void dump_device_stats(void)
174 syslog(LOG_DEBUG, _("Statistics for %s %s:"), device_info, device);
175 syslog(LOG_DEBUG, _(" total bytes in: %10d"), device_total_in);
176 syslog(LOG_DEBUG, _(" total bytes out: %10d"), device_total_out);