2 device.c -- Interaction with Solaris tun device
3 Copyright (C) 2001-2005 Ivo Timmermans,
4 2001-2012 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 along
17 with this program; if not, write to the Free Software Foundation, Inc.,
18 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21 #include "../system.h"
23 #include <sys/stropts.h>
24 #include <sys/sockio.h>
25 #include <net/if_tun.h>
28 #include "../device.h"
29 #include "../logger.h"
32 #include "../xalloc.h"
34 #define DEFAULT_DEVICE "/dev/tun"
37 static int ip_fd = -1, if_fd = -1;
40 static char *device_info = NULL;
42 static uint64_t device_total_in = 0;
43 static uint64_t device_total_out = 0;
45 static bool setup_device(void) {
49 if(!get_config_string(lookup_config(config_tree, "Device"), &device))
50 device = xstrdup(DEFAULT_DEVICE);
52 if((device_fd = open(device, O_RDWR | O_NONBLOCK)) < 0) {
53 logger(LOG_ERR, "Could not open %s: %s", device, strerror(errno));
58 fcntl(device_fd, F_SETFD, FD_CLOEXEC);
64 while(*ptr && !isdigit((int) *ptr))
68 if((ip_fd = open("/dev/ip", O_RDWR, 0)) < 0) {
69 logger(LOG_ERR, "Could not open /dev/ip: %s", strerror(errno));
74 fcntl(ip_fd, F_SETFD, FD_CLOEXEC);
77 /* Assign a new PPA and get its unit number. */
78 if((ppa = ioctl(device_fd, TUNNEWPPA, ppa)) < 0) {
79 logger(LOG_ERR, "Can't assign new interface: %s", strerror(errno));
83 if((if_fd = open(device, O_RDWR, 0)) < 0) {
84 logger(LOG_ERR, "Could not open %s twice: %s", device,
90 fcntl(if_fd, F_SETFD, FD_CLOEXEC);
93 if(ioctl(if_fd, I_PUSH, "ip") < 0) {
94 logger(LOG_ERR, "Can't push IP module: %s", strerror(errno));
98 /* Assign ppa according to the unit number returned by tun device */
99 if(ioctl(if_fd, IF_UNITSEL, (char *) &ppa) < 0) {
100 logger(LOG_ERR, "Can't set PPA %d: %s", ppa, strerror(errno));
104 if(ioctl(ip_fd, I_LINK, if_fd) < 0) {
105 logger(LOG_ERR, "Can't link TUN device to IP: %s", strerror(errno));
109 if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
110 xasprintf(&iface, "tun%d", ppa);
112 device_info = "Solaris tun device";
114 logger(LOG_INFO, "%s is a %s", device, device_info);
119 static void close_device(void) {
128 static bool read_packet(vpn_packet_t *packet) {
131 if((lenin = read(device_fd, packet->data + 14, MTU - 14)) <= 0) {
132 logger(LOG_ERR, "Error while reading from %s %s: %s", device_info,
133 device, strerror(errno));
137 switch(packet->data[14] >> 4) {
139 packet->data[12] = 0x08;
140 packet->data[13] = 0x00;
143 packet->data[12] = 0x86;
144 packet->data[13] = 0xDD;
147 ifdebug(TRAFFIC) logger(LOG_ERR,
148 "Unknown IP version %d while reading packet from %s %s",
149 packet->data[14] >> 4, device_info, device);
153 memset(packet->data, 0, 12);
154 packet->len = lenin + 14;
156 device_total_in += packet->len;
158 ifdebug(TRAFFIC) logger(LOG_DEBUG, "Read packet of %d bytes from %s", packet->len,
164 static bool write_packet(vpn_packet_t *packet) {
165 ifdebug(TRAFFIC) logger(LOG_DEBUG, "Writing packet of %d bytes to %s",
166 packet->len, device_info);
168 if(write(device_fd, packet->data + 14, packet->len - 14) < 0) {
169 logger(LOG_ERR, "Can't write to %s %s: %s", device_info,
170 device, strerror(errno));
174 device_total_out += packet->len;
179 static void dump_device_stats(void) {
180 logger(LOG_DEBUG, "Statistics for %s %s:", device_info, device);
181 logger(LOG_DEBUG, " total bytes in: %10"PRIu64, device_total_in);
182 logger(LOG_DEBUG, " total bytes out: %10"PRIu64, device_total_out);
185 const devops_t os_devops = {
186 .setup = setup_device,
187 .close = close_device,
189 .write = write_packet,
190 .dump_stats = dump_device_stats,