2 device.c -- Interaction with NetBSD tun device
3 Copyright (C) 2001-2003 Ivo Timmermans <ivo@o2w.nl>,
4 2001-2003 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 1.1.2.11 2003/07/18 13:41:36 guus Exp $
30 #define DEFAULT_DEVICE "/dev/tun0"
32 #define DEVICE_TYPE_ETHERTAP 0
33 #define DEVICE_TYPE_TUNTAP 1
41 int device_total_in = 0;
42 int device_total_out = 0;
44 int setup_device(void)
48 if(!get_config_string(lookup_config(config_tree, "Device"), &device))
49 device = DEFAULT_DEVICE;
51 if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
52 iface = rindex(device, '/') ? rindex(device, '/') + 1 : device;
53 if((device_fd = open(device, O_RDWR | O_NONBLOCK)) < 0) {
54 logger(LOG_ERR, _("Could not open %s: %s"), device, strerror(errno));
58 device_info = _("NetBSD tun device");
60 logger(LOG_INFO, _("%s is a %s"), device, device_info);
65 void close_device(void)
72 int read_packet(vpn_packet_t *packet)
78 if((lenin = read(device_fd, packet->data + 14, MTU - 14)) <= 0) {
79 logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
80 device, strerror(errno));
84 packet->data[12] = 0x08;
85 packet->data[13] = 0x00;
87 packet->len = lenin + 14;
89 device_total_in += packet->len;
91 ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Read packet of %d bytes from %s"), packet->len,
98 int write_packet(vpn_packet_t *packet)
102 ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
103 packet->len, device_info);
105 if(write(device_fd, packet->data + 14, packet->len - 14) < 0) {
106 logger(LOG_ERR, _("Can't write to %s %s: %s"), device_info, device,
111 device_total_out += packet->len;
114 void dump_device_stats(void)
118 logger(LOG_DEBUG, _("Statistics for %s %s:"), device_info, device);
119 logger(LOG_DEBUG, _(" total bytes in: %10d"), device_total_in);
120 logger(LOG_DEBUG, _(" total bytes out: %10d"), device_total_out);