3 * BlueZ - Bluetooth protocol stack for Linux
5 * Copyright (C) 2002-2003 Maxim Krasnyansky <maxk@qualcomm.com>
6 * Copyright (C) 2002-2010 Marcel Holtmann <marcel@holtmann.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
39 #include <sys/socket.h>
41 #include <bluetooth/bluetooth.h>
42 #include <bluetooth/hci.h>
43 #include <bluetooth/hci_lib.h>
44 #include <bluetooth/rfcomm.h>
45 #include <bluetooth/hidp.h>
51 volatile sig_atomic_t __io_canceled;
53 /* MS dialup networking support (i.e. CLIENT / CLIENTSERVER thing) */
56 static char *pppd = "/usr/sbin/pppd";
57 static char *pppd_opts[DUN_MAX_PPP_OPTS] =
59 /* First 3 are reserved */
66 static int detach = 1;
68 static int use_sdp = 1;
73 static int type = LANACCESS;
74 static int search_duration = 10;
75 static uint use_cache;
86 static bdaddr_t src_addr = *BDADDR_ANY;
87 static int src_dev = -1;
89 volatile int terminate;
99 static int create_connection(char *dst, bdaddr_t *bdaddr, int mrouter);
101 static int do_listen(void)
103 struct sockaddr_rc sa;
106 if (type == MROUTER) {
110 if (create_connection(cache.dst, &cache.bdaddr, type) < 0) {
111 syslog(LOG_ERR, "Cannot connect to mRouter device. %s(%d)",
112 strerror(errno), errno);
118 channel = DUN_DEFAULT_CHANNEL;
121 dun_sdp_register(&src_addr, channel, type);
124 syslog(LOG_INFO, "Waiting for mRouter callback on channel %d", channel);
126 /* Create RFCOMM socket */
127 sk = socket(AF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM);
129 syslog(LOG_ERR, "Cannot create RFCOMM socket. %s(%d)",
130 strerror(errno), errno);
134 sa.rc_family = AF_BLUETOOTH;
135 sa.rc_channel = channel;
136 sa.rc_bdaddr = src_addr;
138 if (bind(sk, (struct sockaddr *) &sa, sizeof(sa))) {
139 syslog(LOG_ERR, "Bind failed. %s(%d)", strerror(errno), errno);
146 lm |= RFCOMM_LM_MASTER;
148 lm |= RFCOMM_LM_AUTH;
150 lm |= RFCOMM_LM_ENCRYPT;
152 lm |= RFCOMM_LM_SECURE;
154 if (lm && setsockopt(sk, SOL_RFCOMM, RFCOMM_LM, &lm, sizeof(lm)) < 0) {
155 syslog(LOG_ERR, "Failed to set link mode. %s(%d)", strerror(errno), errno);
162 socklen_t alen = sizeof(sa);
167 nsk = accept(sk, (struct sockaddr *) &sa, &alen);
169 syslog(LOG_ERR, "Accept failed. %s(%d)", strerror(errno), errno);
177 syslog(LOG_ERR, "Fork failed. %s(%d)", strerror(errno), errno);
180 if (type == MROUTER) {
189 if (msdun && ms_dun(nsk, 1, msdun) < 0) {
190 syslog(LOG_ERR, "MSDUN failed. %s(%d)", strerror(errno), errno);
194 ba2str(&sa.rc_bdaddr, ba);
195 snprintf(ch, sizeof(ch), "%d", channel);
197 /* Setup environment */
198 setenv("DUN_BDADDR", ba, 1);
199 setenv("DUN_CHANNEL", ch, 1);
201 if (!dun_open_connection(nsk, pppd, pppd_opts, 0))
202 syslog(LOG_INFO, "New connection from %s", ba);
209 dun_sdp_unregister();
213 /* Connect and initiate RFCOMM session
215 * -1 - critical error (exit persist mode)
216 * 1 - non critical error
219 static int create_connection(char *dst, bdaddr_t *bdaddr, int mrouter)
221 struct sockaddr_rc sa;
224 if (use_cache && cache.valid && cache.channel) {
225 /* Use cached channel */
228 } else if (!channel) {
229 syslog(LOG_INFO, "Searching for %s on %s", mrouter ? "SP" : "LAP", dst);
231 if (dun_sdp_search(&src_addr, bdaddr, &ch, mrouter) <= 0)
236 syslog(LOG_INFO, "Connecting to %s channel %d", dst, ch);
238 sk = socket(AF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM);
240 syslog(LOG_ERR, "Cannot create RFCOMM socket. %s(%d)",
241 strerror(errno), errno);
245 sa.rc_family = AF_BLUETOOTH;
247 sa.rc_bdaddr = src_addr;
249 if (bind(sk, (struct sockaddr *) &sa, sizeof(sa)))
250 syslog(LOG_ERR, "Bind failed. %s(%d)",
251 strerror(errno), errno);
254 sa.rc_bdaddr = *bdaddr;
256 if (!connect(sk, (struct sockaddr *) &sa, sizeof(sa)) ) {
263 syslog(LOG_INFO, "Connection established");
265 if (msdun && ms_dun(sk, 0, msdun) < 0) {
266 syslog(LOG_ERR, "MSDUN failed. %s(%d)", strerror(errno), errno);
271 if (!dun_open_connection(sk, pppd, pppd_opts, (persist > 0)))
276 syslog(LOG_ERR, "Connect to %s failed. %s(%d)",
277 dst, strerror(errno), errno);
284 /* Succesesful connection, validate cache */
285 strcpy(cache.dst, dst);
286 bacpy(&cache.bdaddr, bdaddr);
288 cache.valid = use_cache;
299 /* Search and connect
301 * -1 - critical error (exit persist mode)
302 * 1 - non critical error
305 static int do_connect(void)
317 /* Use cached bdaddr */
318 r = create_connection(cache.dst, &cache.bdaddr, 0);
326 syslog(LOG_INFO, "Inquiring");
328 /* FIXME: Should we use non general LAP here ? */
331 n = hci_inquiry(src_dev, search_duration, 0, NULL, &ii, 0);
333 syslog(LOG_ERR, "Inquiry failed. %s(%d)", strerror(errno), errno);
337 for (i = 0; i < n; i++) {
339 ba2str(&ii[i].bdaddr, dst);
341 r = create_connection(dst, &ii[i].bdaddr, 0);
348 } while (!terminate && persist);
353 static void do_show(void)
355 dun_show_connections();
358 static void do_kill(char *dst)
363 dun_kill_connection((void *) &ba);
365 dun_kill_all_connections();
368 static void sig_hup(int sig)
373 static void sig_term(int sig)
379 static struct option main_lopts[] = {
380 { "help", 0, 0, 'h' },
381 { "listen", 0, 0, 's' },
382 { "connect", 1, 0, 'c' },
383 { "search", 2, 0, 'Q' },
384 { "kill", 1, 0, 'k' },
385 { "killall", 0, 0, 'K' },
386 { "channel", 1, 0, 'P' },
387 { "device", 1, 0, 'i' },
388 { "nosdp", 0, 0, 'D' },
389 { "list", 0, 0, 'l' },
390 { "show", 0, 0, 'l' },
391 { "nodetach", 0, 0, 'n' },
392 { "persist", 2, 0, 'p' },
393 { "auth", 0, 0, 'A' },
394 { "encrypt", 0, 0, 'E' },
395 { "secure", 0, 0, 'S' },
396 { "master", 0, 0, 'M' },
397 { "cache", 0, 0, 'C' },
398 { "pppd", 1, 0, 'd' },
399 { "msdun", 2, 0, 'X' },
400 { "activesync", 0, 0, 'a' },
401 { "mrouter", 1, 0, 'm' },
402 { "dialup", 0, 0, 'u' },
406 static const char *main_sopts = "hsc:k:Kr:i:lnp::DQ::AESMP:C::P:Xam:u";
408 static const char *main_help =
409 "Bluetooth LAP (LAN Access over PPP) daemon version %s\n"
411 "\tdund <options> [pppd options]\n"
413 "\t--show --list -l Show active LAP connections\n"
414 "\t--listen -s Listen for LAP connections\n"
415 "\t--dialup -u Pretend to be a dialup/telephone\n"
416 "\t--connect -c <bdaddr> Create LAP connection\n"
417 "\t--mrouter -m <bdaddr> Create mRouter connection\n"
418 "\t--search -Q[duration] Search and connect\n"
419 "\t--kill -k <bdaddr> Kill LAP connection\n"
420 "\t--killall -K Kill all LAP connections\n"
421 "\t--channel -P <channel> RFCOMM channel\n"
422 "\t--device -i <bdaddr> Source bdaddr\n"
423 "\t--nosdp -D Disable SDP\n"
424 "\t--auth -A Enable authentication\n"
425 "\t--encrypt -E Enable encryption\n"
426 "\t--secure -S Secure connection\n"
427 "\t--master -M Become the master of a piconet\n"
428 "\t--nodetach -n Do not become a daemon\n"
429 "\t--persist -p[interval] Persist mode\n"
430 "\t--pppd -d <pppd> Location of the PPP daemon (pppd)\n"
431 "\t--msdun -X[timeo] Enable Microsoft dialup networking support\n"
432 "\t--activesync -a Enable Microsoft ActiveSync networking\n"
433 "\t--cache -C[valid] Enable address cache\n";
435 int main(int argc, char *argv[])
437 char *dst = NULL, *src = NULL;
442 while ((opt=getopt_long(argc, argv, main_sopts, main_lopts, NULL)) != -1) {
456 dst = strdup(optarg);
463 search_duration = atoi(optarg);
469 dst = strdup(optarg);
479 channel = atoi(optarg);
483 src = strdup(optarg);
512 persist = atoi(optarg);
519 use_cache = atoi(optarg);
525 pppd = strdup(optarg);
530 msdun = atoi(optarg);
542 dst = strdup(optarg);
553 printf(main_help, VERSION);
561 /* The rest is pppd options */
563 for (opt = 3; argc && opt < DUN_MAX_PPP_OPTS - 1;
565 pppd_opts[opt] = *argv++;
566 pppd_opts[opt] = NULL;
576 /* Check non daemon modes first */
589 printf(main_help, VERSION);
594 /* Initialize signals */
595 memset(&sa, 0, sizeof(sa));
596 sa.sa_flags = SA_NOCLDSTOP;
597 sa.sa_handler = SIG_IGN;
598 sigaction(SIGCHLD, &sa, NULL);
599 sigaction(SIGPIPE, &sa, NULL);
601 sa.sa_handler = sig_term;
602 sigaction(SIGTERM, &sa, NULL);
603 sigaction(SIGINT, &sa, NULL);
605 sa.sa_handler = sig_hup;
606 sigaction(SIGHUP, &sa, NULL);
608 if (detach && daemon(0, 0)) {
609 perror("Can't start daemon");
613 openlog("dund", LOG_PID | LOG_NDELAY | LOG_PERROR, LOG_DAEMON);
614 syslog(LOG_INFO, "Bluetooth DUN daemon version %s", VERSION);
617 src_dev = hci_devid(src);
618 if (src_dev < 0 || hci_devba(src_dev, &src_addr) < 0) {
619 syslog(LOG_ERR, "Invalid source. %s(%d)", strerror(errno), errno);
626 strncpy(cache.dst, dst, sizeof(cache.dst) - 1);
627 str2ba(dst, &cache.bdaddr);
629 /* Disable cache invalidation */
630 use_cache = cache.valid = ~0;