2 device.c -- Interaction with Solaris tun device
3 Copyright (C) 2001-2002 Ivo Timmermans <ivo@o2w.nl>,
4 2001-2002 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 1.1.2.8 2002/06/21 10:11:37 guus Exp $
28 #include <sys/types.h>
31 #include <sys/socket.h>
36 #include <sys/ioctl.h>
37 #include <sys/stropts.h>
38 #include <sys/sockio.h>
39 #include <net/if_tun.h>
41 #define DEFAULT_DEVICE "/dev/tun"
53 char *interface = NULL;
54 char ifrname[IFNAMSIZ];
55 char *device_info = NULL;
57 int device_total_in = 0;
58 int device_total_out = 0;
62 int setup_device(void)
64 int ip_fd = -1, if_fd = -1;
69 if(!get_config_string(lookup_config(config_tree, "Device"), &device))
70 device = DEFAULT_DEVICE;
73 if((device_fd = open(device, O_RDWR | O_NONBLOCK)) < 0)
75 syslog(LOG_ERR, _("Could not open %s: %s"), device, strerror(errno));
82 while(*ptr && !isdigit((int)*ptr)) ptr++;
85 if( (ip_fd = open("/dev/ip", O_RDWR, 0)) < 0){
86 syslog(LOG_ERR, _("Could not open /dev/ip: %s"), strerror(errno));
90 /* Assign a new PPA and get its unit number. */
91 if( (ppa = ioctl(device_fd, TUNNEWPPA, ppa)) < 0){
92 syslog(LOG_ERR, _("Can't assign new interface: %s"), strerror(errno));
96 if( (if_fd = open(device, O_RDWR, 0)) < 0){
97 syslog(LOG_ERR, _("Could not open %s twice: %s"), device, strerror(errno));
101 if(ioctl(if_fd, I_PUSH, "ip") < 0){
102 syslog(LOG_ERR, _("Can't push IP module: %s"), strerror(errno));
106 /* Assign ppa according to the unit number returned by tun device */
107 if(ioctl(if_fd, IF_UNITSEL, (char *)&ppa) < 0){
108 syslog(LOG_ERR, _("Can't set PPA %d: %s"), ppa, strerror(errno));
112 if(ioctl(ip_fd, I_LINK, if_fd) < 0){
113 syslog(LOG_ERR, _("Can't link TUN device to IP: %s"), strerror(errno));
117 if(!get_config_string(lookup_config(config_tree, "Interface"), &interface))
118 asprintf(&interface, "tun%d", ppa);
120 device_info = _("Solaris tun device");
122 /* Set default MAC address for ethertap devices */
124 mymac.type = SUBNET_MAC;
125 mymac.net.mac.address.x[0] = 0xfe;
126 mymac.net.mac.address.x[1] = 0xfd;
127 mymac.net.mac.address.x[2] = 0x00;
128 mymac.net.mac.address.x[3] = 0x00;
129 mymac.net.mac.address.x[4] = 0x00;
130 mymac.net.mac.address.x[5] = 0x00;
132 syslog(LOG_INFO, _("%s is a %s"), device, device_info);
137 void close_device(void)
143 int read_packet(vpn_packet_t *packet)
147 if((lenin = read(device_fd, packet->data + 14, MTU - 14)) <= 0)
149 syslog(LOG_ERR, _("Error while reading from %s %s: %s"), device_info, device, strerror(errno));
153 memcpy(packet->data, mymac.net.mac.address.x, 6);
154 memcpy(packet->data + 6, mymac.net.mac.address.x, 6);
155 packet->data[12] = 0x08;
156 packet->data[13] = 0x00;
158 packet->len = lenin + 14;
160 device_total_in += packet->len;
162 if(debug_lvl >= DEBUG_TRAFFIC)
164 syslog(LOG_DEBUG, _("Read packet of %d bytes from %s"), packet->len, device_info);
171 int write_packet(vpn_packet_t *packet)
174 if(debug_lvl >= DEBUG_TRAFFIC)
175 syslog(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
176 packet->len, device_info);
178 if(write(device_fd, packet->data + 14, packet->len - 14) < 0)
180 syslog(LOG_ERR, _("Can't write to %s %s: %s"), device_info, packet->len, strerror(errno));
184 device_total_out += packet->len;
189 void dump_device_stats(void)
192 syslog(LOG_DEBUG, _("Statistics for %s %s:"), device_info, device);
193 syslog(LOG_DEBUG, _(" total bytes in: %10d"), device_total_in);
194 syslog(LOG_DEBUG, _(" total bytes out: %10d"), device_total_out);