2 device.c -- Interaction with Solaris tun device
3 Copyright (C) 2001-2005 Ivo Timmermans,
4 2001-2013 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.
22 #include "../system.h"
24 #include <sys/stropts.h>
25 #include <sys/sockio.h>
26 #include <net/if_tun.h>
29 #include "../device.h"
30 #include "../logger.h"
34 #include "../xalloc.h"
36 #define DEFAULT_DEVICE "/dev/tun"
39 static int ip_fd = -1, if_fd = -1;
42 static char *device_info = NULL;
44 static uint64_t device_total_in = 0;
45 static uint64_t device_total_out = 0;
47 static bool setup_device(void) {
51 if(!get_config_string(lookup_config(config_tree, "Device"), &device))
52 device = xstrdup(DEFAULT_DEVICE);
54 if((device_fd = open(device, O_RDWR | O_NONBLOCK)) < 0) {
55 logger(DEBUG_ALWAYS, LOG_ERR, "Could not open %s: %s", device, strerror(errno));
60 fcntl(device_fd, F_SETFD, FD_CLOEXEC);
66 while(*ptr && !isdigit((int) *ptr))
70 if((ip_fd = open("/dev/ip", O_RDWR, 0)) < 0) {
71 logger(DEBUG_ALWAYS, LOG_ERR, "Could not open /dev/ip: %s", strerror(errno));
76 fcntl(ip_fd, F_SETFD, FD_CLOEXEC);
79 /* Assign a new PPA and get its unit number. */
80 if((ppa = ioctl(device_fd, TUNNEWPPA, ppa)) < 0) {
81 logger(DEBUG_ALWAYS, LOG_ERR, "Can't assign new interface: %s", strerror(errno));
85 if((if_fd = open(device, O_RDWR, 0)) < 0) {
86 logger(DEBUG_ALWAYS, LOG_ERR, "Could not open %s twice: %s", device,
92 fcntl(if_fd, F_SETFD, FD_CLOEXEC);
95 if(ioctl(if_fd, I_PUSH, "ip") < 0) {
96 logger(DEBUG_ALWAYS, LOG_ERR, "Can't push IP module: %s", strerror(errno));
100 /* Assign ppa according to the unit number returned by tun device */
101 if(ioctl(if_fd, IF_UNITSEL, (char *) &ppa) < 0) {
102 logger(DEBUG_ALWAYS, LOG_ERR, "Can't set PPA %d: %s", ppa, strerror(errno));
106 if(ioctl(ip_fd, I_LINK, if_fd) < 0) {
107 logger(DEBUG_ALWAYS, LOG_ERR, "Can't link TUN device to IP: %s", strerror(errno));
111 if(!get_config_string(lookup_config(config_tree, "Interface"), &iface))
112 xasprintf(&iface, "tun%d", ppa);
114 device_info = "Solaris tun device";
116 logger(DEBUG_ALWAYS, LOG_INFO, "%s is a %s", device, device_info);
121 static void close_device(void) {
130 static bool read_packet(vpn_packet_t *packet) {
133 if((inlen = read(device_fd, packet->data + 14, MTU - 14)) <= 0) {
134 logger(DEBUG_ALWAYS, LOG_ERR, "Error while reading from %s %s: %s", device_info,
135 device, strerror(errno));
139 switch(packet->data[14] >> 4) {
141 packet->data[12] = 0x08;
142 packet->data[13] = 0x00;
145 packet->data[12] = 0x86;
146 packet->data[13] = 0xDD;
149 logger(DEBUG_TRAFFIC, LOG_ERR,
150 "Unknown IP version %d while reading packet from %s %s",
151 packet->data[14] >> 4, device_info, device);
155 memset(packet->data, 0, 12);
156 packet->len = inlen + 14;
158 device_total_in += packet->len;
160 logger(DEBUG_TRAFFIC, LOG_DEBUG, "Read packet of %d bytes from %s", packet->len,
166 static bool write_packet(vpn_packet_t *packet) {
167 logger(DEBUG_TRAFFIC, LOG_DEBUG, "Writing packet of %d bytes to %s",
168 packet->len, device_info);
170 if(write(device_fd, packet->data + 14, packet->len - 14) < 0) {
171 logger(DEBUG_ALWAYS, LOG_ERR, "Can't write to %s %s: %s", device_info,
172 device, strerror(errno));
176 device_total_out += packet->len;
181 static void dump_device_stats(void) {
182 logger(DEBUG_ALWAYS, LOG_DEBUG, "Statistics for %s %s:", device_info, device);
183 logger(DEBUG_ALWAYS, LOG_DEBUG, " total bytes in: %10"PRIu64, device_total_in);
184 logger(DEBUG_ALWAYS, LOG_DEBUG, " total bytes out: %10"PRIu64, device_total_out);
187 const devops_t os_devops = {
188 .setup = setup_device,
189 .close = close_device,
191 .write = write_packet,
192 .dump_stats = dump_device_stats,