2 device.c -- UML network socket
3 Copyright (C) 2002-2005 Ivo Timmermans,
4 2002-2009 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.
20 $Id: device.c 1374 2004-03-21 14:21:22Z guus $
34 static int listen_fd = -1;
35 static int request_fd = -1;
36 static int data_fd = -1;
37 static int write_fd = -1;
41 static char *device_info;
43 extern char *identname;
46 static int device_total_in = 0;
47 static int device_total_out = 0;
49 enum request_type { REQ_NEW_CONTROL };
51 static struct request {
54 enum request_type type;
55 struct sockaddr_un sock;
58 static struct sockaddr_un data_sun;
60 bool setup_device(void) {
61 struct sockaddr_un listen_sun;
62 static const int one = 1;
72 if(!get_config_string(lookup_config(config_tree, "Device"), &device))
73 asprintf(&device, LOCALSTATEDIR "/run/%s.umlsocket", identname);
75 get_config_string(lookup_config(config_tree, "Interface"), &iface);
77 device_info = _("UML network socket");
79 if((write_fd = socket(PF_UNIX, SOCK_DGRAM, 0)) < 0) {
80 logger(LOG_ERR, _("Could not open write %s: %s"), device_info, strerror(errno));
85 setsockopt(write_fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof one);
87 if(fcntl(write_fd, F_SETFL, O_NONBLOCK) < 0) {
88 logger(LOG_ERR, _("System call `%s' failed: %s"), "fcntl", strerror(errno));
93 if((data_fd = socket(PF_UNIX, SOCK_DGRAM, 0)) < 0) {
94 logger(LOG_ERR, _("Could not open data %s: %s"), device_info, strerror(errno));
99 setsockopt(data_fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof one);
101 if(fcntl(data_fd, F_SETFL, O_NONBLOCK) < 0) {
102 logger(LOG_ERR, _("System call `%s' failed: %s"), "fcntl", strerror(errno));
109 gettimeofday(&tv, NULL);
110 name.usecs = tv.tv_usec;
111 data_sun.sun_family = AF_UNIX;
112 memcpy(&data_sun.sun_path, &name, sizeof name);
114 if(bind(data_fd, (struct sockaddr *)&data_sun, sizeof data_sun) < 0) {
115 logger(LOG_ERR, _("Could not bind data %s: %s"), device_info, strerror(errno));
120 if((listen_fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) {
121 logger(LOG_ERR, _("Could not open %s: %s"), device_info,
126 setsockopt(listen_fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof one);
128 if(fcntl(listen_fd, F_SETFL, O_NONBLOCK) < 0) {
129 logger(LOG_ERR, _("System call `%s' failed: %s"), "fcntl", strerror(errno));
133 listen_sun.sun_family = AF_UNIX;
134 strncpy(listen_sun.sun_path, device, sizeof listen_sun.sun_path);
135 if(bind(listen_fd, (struct sockaddr *)&listen_sun, sizeof listen_sun) < 0) {
136 logger(LOG_ERR, _("Could not bind %s to %s: %s"), device_info, device, strerror(errno));
140 if(listen(listen_fd, 1) < 0) {
141 logger(LOG_ERR, _("Could not listen on %s %s: %s"), device_info, device, strerror(errno));
145 device_fd = listen_fd;
148 logger(LOG_INFO, _("%s is a %s"), device, device_info);
150 if(routing_mode == RMODE_ROUTER)
151 overwrite_mac = true;
156 void close_device(void) {
174 if(iface) free(iface);
177 bool read_packet(vpn_packet_t *packet) {
185 int salen = sizeof sa;
187 request_fd = accept(listen_fd, &sa, &salen);
189 logger(LOG_ERR, _("Could not accept connection to %s %s: %s"), device_info, device, strerror(errno));
193 if(fcntl(listen_fd, F_SETFL, O_NONBLOCK) < 0) {
194 logger(LOG_ERR, _("System call `%s' failed: %s"), "fcntl", strerror(errno));
201 device_fd = request_fd;
208 if((inlen = read(request_fd, &request, sizeof request)) != sizeof request) {
209 logger(LOG_ERR, _("Error while reading request from %s %s: %s"), device_info,
210 device, strerror(errno));
215 if(request.magic != 0xfeedface || request.version != 3 || request.type != REQ_NEW_CONTROL) {
216 logger(LOG_ERR, _("Unknown magic %x, version %d, request type %d from %s %s"),
217 request.magic, request.version, request.type, device_info, device);
222 if(connect(write_fd, &request.sock, sizeof request.sock) < 0) {
223 logger(LOG_ERR, _("Could not bind write %s: %s"), device_info, strerror(errno));
228 write(request_fd, &data_sun, sizeof data_sun);
231 logger(LOG_INFO, _("Connection with UML established"));
238 if((inlen = read(data_fd, packet->data, MTU)) <= 0) {
239 logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
240 device, strerror(errno));
247 device_total_in += packet->len;
249 ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Read packet of %d bytes from %s"), packet->len,
257 bool write_packet(vpn_packet_t *packet) {
261 ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Dropping packet of %d bytes to %s: not connected to UML yet"),
262 packet->len, device_info);
266 ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
267 packet->len, device_info);
269 if(write(write_fd, packet->data, packet->len) < 0) {
270 if(errno != EINTR && errno != EAGAIN) {
271 logger(LOG_ERR, _("Can't write to %s %s: %s"), device_info, device, strerror(errno));
278 device_total_out += packet->len;
283 void dump_device_stats(void) {
286 logger(LOG_DEBUG, _("Statistics for %s %s:"), device_info, device);
287 logger(LOG_DEBUG, _(" total bytes in: %10d"), device_total_in);
288 logger(LOG_DEBUG, _(" total bytes out: %10d"), device_total_out);