main.c revision 91e068319e23b8a7a5f25c195eb81c4ef03b8eff 
1/*
2 *
3 *  BlueZ - Bluetooth protocol stack for Linux
4 *
5 *  Copyright (C) 2000-2001  Qualcomm Incorporated
6 *  Copyright (C) 2002-2003  Maxim Krasnyansky <maxk@qualcomm.com>
7 *  Copyright (C) 2002-2010  Marcel Holtmann <marcel@holtmann.org>
8 *
9 *
10 *  This program is free software; you can redistribute it and/or modify
11 *  it under the terms of the GNU General Public License as published by
12 *  the Free Software Foundation; either version 2 of the License, or
13 *  (at your option) any later version.
14 *
15 *  This program is distributed in the hope that it will be useful,
16 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
17 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18 *  GNU General Public License for more details.
19 *
20 *  You should have received a copy of the GNU General Public License
21 *  along with this program; if not, write to the Free Software
22 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
23 *
24 */
25
26#ifdef HAVE_CONFIG_H
27#include <config.h>
28#endif
29
30#include <errno.h>
31#include <stdio.h>
32#include <unistd.h>
33#include <stdlib.h>
34#include <string.h>
35#include <signal.h>
36#include <sys/stat.h>
37#include <sys/ioctl.h>
38#include <sys/socket.h>
39#include <sys/types.h>
40
41#include <bluetooth/bluetooth.h>
42#include <bluetooth/hci.h>
43#include <bluetooth/hci_lib.h>
44
45#include <glib.h>
46
47#include <dbus/dbus.h>
48
49#include "log.h"
50
51#include "hcid.h"
52#include "sdpd.h"
53#include "attrib-server.h"
54#include "adapter.h"
55#include "event.h"
56#include "dbus-common.h"
57#include "agent.h"
58#include "manager.h"
59
60#ifdef HAVE_CAPNG
61#include <cap-ng.h>
62#endif
63
64#define LAST_ADAPTER_EXIT_TIMEOUT 30
65
66struct main_opts main_opts;
67
68static GKeyFile *load_config(const char *file)
69{
70	GError *err = NULL;
71	GKeyFile *keyfile;
72
73	keyfile = g_key_file_new();
74
75	g_key_file_set_list_separator(keyfile, ',');
76
77	if (!g_key_file_load_from_file(keyfile, file, 0, &err)) {
78		error("Parsing %s failed: %s", file, err->message);
79		g_error_free(err);
80		g_key_file_free(keyfile);
81		return NULL;
82	}
83
84	return keyfile;
85}
86
87static void parse_config(GKeyFile *config)
88{
89	GError *err = NULL;
90	char *str;
91	int val;
92	gboolean boolean;
93
94	if (!config)
95		return;
96
97	DBG("parsing main.conf");
98
99	val = g_key_file_get_integer(config, "General",
100						"DiscoverableTimeout", &err);
101	if (err) {
102		DBG("%s", err->message);
103		g_clear_error(&err);
104	} else {
105		DBG("discovto=%d", val);
106		main_opts.discovto = val;
107		main_opts.flags |= 1 << HCID_SET_DISCOVTO;
108	}
109
110	val = g_key_file_get_integer(config, "General",
111						"PairableTimeout", &err);
112	if (err) {
113		DBG("%s", err->message);
114		g_clear_error(&err);
115	} else {
116		DBG("pairto=%d", val);
117		main_opts.pairto = val;
118	}
119
120	val = g_key_file_get_integer(config, "General", "PageTimeout", &err);
121	if (err) {
122		DBG("%s", err->message);
123		g_clear_error(&err);
124	} else {
125		DBG("pageto=%d", val);
126		main_opts.pageto = val;
127		main_opts.flags |= 1 << HCID_SET_PAGETO;
128	}
129
130	str = g_key_file_get_string(config, "General", "Name", &err);
131	if (err) {
132		DBG("%s", err->message);
133		g_clear_error(&err);
134	} else {
135		DBG("name=%s", str);
136		g_free(main_opts.name);
137		main_opts.name = g_strdup(str);
138		main_opts.flags |= 1 << HCID_SET_NAME;
139		g_free(str);
140	}
141
142	str = g_key_file_get_string(config, "General", "Class", &err);
143	if (err) {
144		DBG("%s", err->message);
145		g_clear_error(&err);
146	} else {
147		DBG("class=%s", str);
148		main_opts.class = strtol(str, NULL, 16);
149		main_opts.flags |= 1 << HCID_SET_CLASS;
150		g_free(str);
151	}
152
153	val = g_key_file_get_integer(config, "General",
154					"DiscoverSchedulerInterval", &err);
155	if (err) {
156		DBG("%s", err->message);
157		g_clear_error(&err);
158	} else {
159		DBG("discov_interval=%d", val);
160		main_opts.discov_interval = val;
161	}
162
163	boolean = g_key_file_get_boolean(config, "General",
164						"InitiallyPowered", &err);
165	if (err) {
166		DBG("%s", err->message);
167		g_clear_error(&err);
168	} else if (boolean == FALSE)
169		main_opts.mode = MODE_OFF;
170
171	boolean = g_key_file_get_boolean(config, "General",
172						"RememberPowered", &err);
173	if (err) {
174		DBG("%s", err->message);
175		g_clear_error(&err);
176	} else
177		main_opts.remember_powered = boolean;
178
179	str = g_key_file_get_string(config, "General", "DeviceID", &err);
180	if (err) {
181		DBG("%s", err->message);
182		g_clear_error(&err);
183	} else {
184		DBG("deviceid=%s", str);
185		strncpy(main_opts.deviceid, str,
186					sizeof(main_opts.deviceid) - 1);
187		g_free(str);
188	}
189
190	boolean = g_key_file_get_boolean(config, "General",
191						"ReverseServiceDiscovery", &err);
192	if (err) {
193		DBG("%s", err->message);
194		g_clear_error(&err);
195	} else
196		main_opts.reverse_sdp = boolean;
197
198	boolean = g_key_file_get_boolean(config, "General",
199						"NameResolving", &err);
200	if (err)
201		g_clear_error(&err);
202	else
203		main_opts.name_resolv = boolean;
204
205	boolean = g_key_file_get_boolean(config, "General",
206						"DebugKeys", &err);
207	if (err)
208		g_clear_error(&err);
209	else
210		main_opts.debug_keys = boolean;
211
212	boolean = g_key_file_get_boolean(config, "General",
213						"AttributeServer", &err);
214	if (err)
215		g_clear_error(&err);
216	else
217		main_opts.attrib_server = boolean;
218
219	main_opts.link_mode = HCI_LM_ACCEPT;
220
221	main_opts.link_policy = HCI_LP_RSWITCH | HCI_LP_SNIFF |
222						HCI_LP_HOLD | HCI_LP_PARK;
223}
224
225/*
226 * Device name expansion
227 *   %d - device id
228 */
229char *expand_name(char *dst, int size, char *str, int dev_id)
230{
231	register int sp, np, olen;
232	char *opt, buf[10];
233
234	if (!str || !dst)
235		return NULL;
236
237	sp = np = 0;
238	while (np < size - 1 && str[sp]) {
239		switch (str[sp]) {
240		case '%':
241			opt = NULL;
242
243			switch (str[sp+1]) {
244			case 'd':
245				sprintf(buf, "%d", dev_id);
246				opt = buf;
247				break;
248
249			case 'h':
250				opt = main_opts.host_name;
251				break;
252
253			case '%':
254				dst[np++] = str[sp++];
255				/* fall through */
256			default:
257				sp++;
258				continue;
259			}
260
261			if (opt) {
262				/* substitute */
263				olen = strlen(opt);
264				if (np + olen < size - 1)
265					memcpy(dst + np, opt, olen);
266				np += olen;
267			}
268			sp += 2;
269			continue;
270
271		case '\\':
272			sp++;
273			/* fall through */
274		default:
275			dst[np++] = str[sp++];
276			break;
277		}
278	}
279	dst[np] = '\0';
280	return dst;
281}
282
283static void init_defaults(void)
284{
285	/* Default HCId settings */
286	memset(&main_opts, 0, sizeof(main_opts));
287	main_opts.scan	= SCAN_PAGE;
288	main_opts.mode	= MODE_CONNECTABLE;
289	main_opts.name	= g_strdup("BlueZ");
290	main_opts.discovto	= HCID_DEFAULT_DISCOVERABLE_TIMEOUT;
291	main_opts.remember_powered = TRUE;
292	main_opts.reverse_sdp = TRUE;
293	main_opts.name_resolv = TRUE;
294
295	if (gethostname(main_opts.host_name, sizeof(main_opts.host_name) - 1) < 0)
296		strcpy(main_opts.host_name, "noname");
297}
298
299static GMainLoop *event_loop;
300
301static void sig_term(int sig)
302{
303	g_main_loop_quit(event_loop);
304}
305
306static void sig_debug(int sig)
307{
308	__btd_toggle_debug();
309}
310
311static gchar *option_debug = NULL;
312static gboolean option_detach = TRUE;
313static gboolean option_version = FALSE;
314static gboolean option_udev = FALSE;
315
316static guint last_adapter_timeout = 0;
317
318static gboolean exit_timeout(gpointer data)
319{
320	g_main_loop_quit(event_loop);
321	last_adapter_timeout = 0;
322	return FALSE;
323}
324
325void btd_start_exit_timer(void)
326{
327	if (option_udev == FALSE)
328		return;
329
330	if (last_adapter_timeout > 0)
331		g_source_remove(last_adapter_timeout);
332
333	last_adapter_timeout = g_timeout_add_seconds(LAST_ADAPTER_EXIT_TIMEOUT,
334						exit_timeout, NULL);
335}
336
337void btd_stop_exit_timer(void)
338{
339	if (last_adapter_timeout == 0)
340		return;
341
342	g_source_remove(last_adapter_timeout);
343	last_adapter_timeout = 0;
344}
345
346static gboolean parse_debug(const char *key, const char *value,
347				gpointer user_data, GError **error)
348{
349	if (value)
350		option_debug = g_strdup(value);
351	else
352		option_debug = g_strdup("*");
353
354	return TRUE;
355}
356
357static GOptionEntry options[] = {
358	{ "debug", 'd', G_OPTION_FLAG_OPTIONAL_ARG,
359				G_OPTION_ARG_CALLBACK, parse_debug,
360				"Specify debug options to enable", "DEBUG" },
361	{ "nodetach", 'n', G_OPTION_FLAG_REVERSE,
362				G_OPTION_ARG_NONE, &option_detach,
363				"Don't run as daemon in background" },
364	{ "version", 'v', 0, G_OPTION_ARG_NONE, &option_version,
365				"Show version information and exit" },
366	{ "udev", 'u', 0, G_OPTION_ARG_NONE, &option_udev,
367				"Run from udev mode of operation" },
368	{ NULL },
369};
370
371int main(int argc, char *argv[])
372{
373	GOptionContext *context;
374	GError *err = NULL;
375	struct sigaction sa;
376	uint16_t mtu = 0;
377	GKeyFile *config;
378
379	init_defaults();
380
381#ifdef HAVE_CAPNG
382	/* Drop capabilities */
383	capng_clear(CAPNG_SELECT_BOTH);
384	capng_updatev(CAPNG_ADD, CAPNG_EFFECTIVE | CAPNG_PERMITTED,
385					CAP_NET_BIND_SERVICE, CAP_NET_ADMIN,
386						CAP_NET_RAW, CAP_IPC_LOCK, -1);
387	capng_apply(CAPNG_SELECT_BOTH);
388#endif
389
390	context = g_option_context_new(NULL);
391	g_option_context_add_main_entries(context, options, NULL);
392
393	if (g_option_context_parse(context, &argc, &argv, &err) == FALSE) {
394		if (err != NULL) {
395			g_printerr("%s\n", err->message);
396			g_error_free(err);
397		} else
398			g_printerr("An unknown error occurred\n");
399		exit(1);
400	}
401
402	g_option_context_free(context);
403
404	if (option_version == TRUE) {
405		printf("%s\n", VERSION);
406		exit(0);
407	}
408
409	if (option_udev == TRUE) {
410		int err;
411
412		option_detach = TRUE;
413		err = hcid_dbus_init();
414		if (err < 0) {
415			if (err == -EALREADY)
416				exit(0);
417			exit(1);
418		}
419	}
420
421	if (option_detach == TRUE && option_udev == FALSE) {
422		if (daemon(0, 0)) {
423			perror("Can't start daemon");
424			exit(1);
425		}
426	}
427
428	umask(0077);
429
430	__btd_log_init(option_debug, option_detach);
431
432	memset(&sa, 0, sizeof(sa));
433	sa.sa_flags = SA_NOCLDSTOP;
434	sa.sa_handler = sig_term;
435	sigaction(SIGTERM, &sa, NULL);
436	sigaction(SIGINT,  &sa, NULL);
437
438	sa.sa_handler = sig_debug;
439	sigaction(SIGUSR2, &sa, NULL);
440
441	sa.sa_handler = SIG_IGN;
442	sigaction(SIGPIPE, &sa, NULL);
443
444	config = load_config(CONFIGDIR "/main.conf");
445
446	parse_config(config);
447
448	agent_init();
449
450	if (option_udev == FALSE) {
451		if (hcid_dbus_init() < 0) {
452			error("Unable to get on D-Bus");
453			exit(1);
454		}
455	} else {
456		if (daemon(0, 0)) {
457			perror("Can't start daemon");
458			exit(1);
459		}
460	}
461
462	start_sdp_server(mtu, main_opts.deviceid, SDP_SERVER_COMPAT);
463
464	if (main_opts.attrib_server) {
465		if (attrib_server_init() < 0)
466			error("Can't initialize attribute server");
467	}
468
469	/* Loading plugins has to be done after D-Bus has been setup since
470	 * the plugins might wanna expose some paths on the bus. However the
471	 * best order of how to init various subsystems of the Bluetooth
472	 * daemon needs to be re-worked. */
473	plugin_init(config);
474
475	event_loop = g_main_loop_new(NULL, FALSE);
476
477	if (adapter_ops_setup() < 0) {
478		error("adapter_ops_setup failed");
479		exit(1);
480	}
481
482	rfkill_init();
483
484	DBG("Entering main loop");
485
486	g_main_loop_run(event_loop);
487
488	hcid_dbus_exit();
489
490	rfkill_exit();
491
492	plugin_cleanup();
493
494	if (main_opts.attrib_server)
495		attrib_server_exit();
496
497	stop_sdp_server();
498
499	agent_exit();
500
501	g_main_loop_unref(event_loop);
502
503	if (config)
504		g_key_file_free(config);
505
506	info("Exit");
507
508	__btd_log_cleanup();
509
510	return 0;
511}
512