2 device.c -- UML network socket
3 Copyright (C) 2002-2004 Ivo Timmermans <ivo@tinc-vpn.org>,
4 2002-2004 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 $
36 static int listen_fd = -1;
37 static int request_fd = -1;
38 static int data_fd = -1;
39 static int write_fd = -1;
45 extern char *identname;
48 int device_total_in = 0;
49 int device_total_out = 0;
51 enum request_type { REQ_NEW_CONTROL };
53 static struct request {
56 enum request_type type;
57 struct sockaddr_un sock;
60 static struct sockaddr_un data_sun;
62 bool setup_device(void)
64 struct sockaddr_un listen_sun;
65 static const int one = 1;
75 if(!get_config_string(lookup_config(config_tree, "Device"), &device))
76 asprintf(&device, LOCALSTATEDIR "/run/%s.umlsocket", identname);
78 get_config_string(lookup_config(config_tree, "Interface"), &iface);
80 device_info = _("UML network socket");
82 if((write_fd = socket(PF_UNIX, SOCK_DGRAM, 0)) < 0) {
83 logger(LOG_ERR, _("Could not open write %s: %s"), device_info, strerror(errno));
88 setsockopt(write_fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof one);
90 if(fcntl(write_fd, F_SETFL, O_NONBLOCK) < 0) {
91 logger(LOG_ERR, _("System call `%s' failed: %s"), "fcntl", strerror(errno));
96 if((data_fd = socket(PF_UNIX, SOCK_DGRAM, 0)) < 0) {
97 logger(LOG_ERR, _("Could not open data %s: %s"), device_info, strerror(errno));
102 setsockopt(data_fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof one);
104 if(fcntl(data_fd, F_SETFL, O_NONBLOCK) < 0) {
105 logger(LOG_ERR, _("System call `%s' failed: %s"), "fcntl", strerror(errno));
112 gettimeofday(&tv, NULL);
113 name.usecs = tv.tv_usec;
114 data_sun.sun_family = AF_UNIX;
115 memcpy(&data_sun.sun_path, &name, sizeof name);
117 if(bind(data_fd, (struct sockaddr *)&data_sun, sizeof data_sun) < 0) {
118 logger(LOG_ERR, _("Could not bind data %s: %s"), device_info, strerror(errno));
123 if((listen_fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) {
124 logger(LOG_ERR, _("Could not open %s: %s"), device_info,
129 setsockopt(listen_fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof one);
131 if(fcntl(listen_fd, F_SETFL, O_NONBLOCK) < 0) {
132 logger(LOG_ERR, _("System call `%s' failed: %s"), "fcntl", strerror(errno));
136 listen_sun.sun_family = AF_UNIX;
137 strncpy(listen_sun.sun_path, device, sizeof listen_sun.sun_path);
138 if(bind(listen_fd, (struct sockaddr *)&listen_sun, sizeof listen_sun) < 0) {
139 logger(LOG_ERR, _("Could not bind %s to %s: %s"), device_info, device, strerror(errno));
143 if(listen(listen_fd, 1) < 0) {
144 logger(LOG_ERR, _("Could not listen on %s %s: %s"), device_info, device, strerror(errno));
148 device_fd = listen_fd;
151 logger(LOG_INFO, _("%s is a %s"), device, device_info);
153 if(routing_mode == RMODE_ROUTER)
154 overwrite_mac = true;
159 void close_device(void)
178 bool read_packet(vpn_packet_t *packet)
187 int salen = sizeof sa;
189 request_fd = accept(listen_fd, &sa, &salen);
191 logger(LOG_ERR, _("Could not accept connection to %s %s: %s"), device_info, device, strerror(errno));
195 if(fcntl(listen_fd, F_SETFL, O_NONBLOCK) < 0) {
196 logger(LOG_ERR, _("System call `%s' failed: %s"), "fcntl", strerror(errno));
203 device_fd = request_fd;
210 if((lenin = read(request_fd, &request, sizeof request)) != sizeof request) {
211 logger(LOG_ERR, _("Error while reading request from %s %s: %s"), device_info,
212 device, strerror(errno));
217 if(request.magic != 0xfeedface || request.version != 3 || request.type != REQ_NEW_CONTROL) {
218 logger(LOG_ERR, _("Unknown magic %x, version %d, request type %d from %s %s"),
219 request.magic, request.version, request.type, device_info, device);
224 if(connect(write_fd, &request.sock, sizeof request.sock) < 0) {
225 logger(LOG_ERR, _("Could not bind write %s: %s"), device_info, strerror(errno));
230 write(request_fd, &data_sun, sizeof data_sun);
233 logger(LOG_INFO, _("Connection with UML established"));
240 if((lenin = read(data_fd, packet->data, MTU)) <= 0) {
241 logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
242 device, strerror(errno));
249 device_total_in += packet->len;
251 ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Read packet of %d bytes from %s"), packet->len,
259 bool write_packet(vpn_packet_t *packet)
264 ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Dropping packet of %d bytes to %s: not connected to UML yet"),
265 packet->len, device_info);
269 ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
270 packet->len, device_info);
272 if(write(write_fd, packet->data, packet->len) < 0) {
273 if(errno != EINTR && errno != EAGAIN) {
274 logger(LOG_ERR, _("Can't write to %s %s: %s"), device_info, device, strerror(errno));
281 device_total_out += packet->len;
286 void dump_device_stats(void)
290 logger(LOG_DEBUG, _("Statistics for %s %s:"), device_info, device);
291 logger(LOG_DEBUG, _(" total bytes in: %10d"), device_total_in);
292 logger(LOG_DEBUG, _(" total bytes out: %10d"), device_total_out);