2 device.c -- Interaction with FreeBSD tap device
3 Copyright (C) 2001-2004 Ivo Timmermans <ivo@tinc-vpn.org>,
4 2001-2004 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.
30 #define DEFAULT_DEVICE "/dev/tap0"
36 static int device_total_in = 0;
37 static int device_total_out = 0;
39 bool setup_device(void)
43 if(!get_config_string(lookup_config(config_tree, "Device"), &device))
44 device = DEFAULT_DEVICE;
46 if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
47 iface = rindex(device, '/') ? rindex(device, '/') + 1 : device;
49 if((device_fd = open(device, O_RDWR | O_NONBLOCK)) < 0) {
50 logger(LOG_ERR, _("Could not open %s: %s"), device, strerror(errno));
54 device_info = _("FreeBSD tap device");
56 logger(LOG_INFO, _("%s is a %s"), device, device_info);
61 void close_device(void)
68 bool read_packet(vpn_packet_t *packet)
74 if((lenin = read(device_fd, packet->data, MTU)) <= 0) {
75 logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
76 device, strerror(errno));
82 device_total_in += packet->len;
84 ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Read packet of %d bytes from %s"),
85 packet->len, device_info);
90 bool write_packet(vpn_packet_t *packet)
94 ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
95 packet->len, device_info);
97 if(write(device_fd, packet->data, packet->len) < 0) {
98 logger(LOG_ERR, _("Error while writing to %s %s: %s"), device_info,
99 device, strerror(errno));
103 device_total_out += packet->len;
108 void dump_device_stats(void)
112 logger(LOG_DEBUG, _("Statistics for %s %s:"), device_info, device);
113 logger(LOG_DEBUG, _(" total bytes in: %10d"), device_total_in);
114 logger(LOG_DEBUG, _(" total bytes out: %10d"), device_total_out);