2 device.c -- Interaction with FreeBSD tap 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 2003/07/12 17:41:47 guus Exp $
27 #include <sys/types.h>
29 #include <sys/ioctl.h>
30 #include <sys/socket.h>
43 #define DEFAULT_DEVICE "/dev/tap0"
50 int device_total_in = 0;
51 int device_total_out = 0;
53 int setup_device(void)
57 if(!get_config_string(lookup_config(config_tree, "Device"), &device))
58 device = DEFAULT_DEVICE;
60 if(!get_config_string(lookup_config(config_tree, "Interface"), &interface))
61 interface = rindex(device, '/') ? rindex(device, '/') + 1 : device;
63 if((device_fd = open(device, O_RDWR | O_NONBLOCK)) < 0) {
64 logger(LOG_ERR, _("Could not open %s: %s"), device, strerror(errno));
68 device_info = _("FreeBSD tap device");
70 logger(LOG_INFO, _("%s is a %s"), device, device_info);
75 void close_device(void)
82 int read_packet(vpn_packet_t *packet)
88 if((lenin = read(device_fd, packet->data, MTU)) <= 0) {
89 logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
90 device, strerror(errno));
96 device_total_in += packet->len;
98 ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Read packet of %d bytes from %s"),
99 packet->len, device_info);
104 int write_packet(vpn_packet_t *packet)
108 ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
109 packet->len, device_info);
111 if(write(device_fd, packet->data, packet->len) < 0) {
112 logger(LOG_ERR, _("Error while writing to %s %s: %s"), device_info,
113 device, strerror(errno));
117 device_total_out += packet->len;
120 void dump_device_stats(void)
124 logger(LOG_DEBUG, _("Statistics for %s %s:"), device_info, device);
125 logger(LOG_DEBUG, _(" total bytes in: %10d"), device_total_in);
126 logger(LOG_DEBUG, _(" total bytes out: %10d"), device_total_out);