summaryrefslogtreecommitdiffstats
path: root/src/dbus-common.c
blob: e4587256ba46980b4242a80504ee78de04ef76f1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
/*
 *
 *  BlueZ - Bluetooth protocol stack for Linux
 *
 *  Copyright (C) 2006-2007  Nokia Corporation
 *  Copyright (C) 2004-2008  Marcel Holtmann <marcel@holtmann.org>
 *  Copyright (C) 2005-2007  Johan Hedberg <johan.hedberg@nokia.com>
 *
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>

#include <bluetooth/bluetooth.h>
#include <bluetooth/hci.h>
#include <bluetooth/l2cap.h>

#include <glib.h>
#include <dbus/dbus.h>
#include <gdbus.h>

#include "logging.h"

#include "manager.h"
#include "adapter.h"
#include "dbus-hci.h"
#include "dbus-common.h"

#define BLUEZ_NAME "org.bluez"

#define RECONNECT_RETRY_TIMEOUT	5000

int l2raw_connect(const bdaddr_t *src, const bdaddr_t *dst)
{
	struct sockaddr_l2 addr;
	long arg;
	int sk;

	sk = socket(PF_BLUETOOTH, SOCK_RAW, BTPROTO_L2CAP);
	if (sk < 0) {
		error("Can't create socket: %s (%d)", strerror(errno), errno);
		return sk;
	}

	memset(&addr, 0, sizeof(addr));
	addr.l2_family = AF_BLUETOOTH;
	bacpy(&addr.l2_bdaddr, src);

	if (bind(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
		error("Can't bind socket: %s (%d)", strerror(errno), errno);
		goto failed;
	}

	arg = fcntl(sk, F_GETFL);
	if (arg < 0) {
		error("Can't get file flags: %s (%d)", strerror(errno), errno);
		goto failed;
	}

	arg |= O_NONBLOCK;
	if (fcntl(sk, F_SETFL, arg) < 0) {
		error("Can't set file flags: %s (%d)", strerror(errno), errno);
		goto failed;
	}

	memset(&addr, 0, sizeof(addr));
	addr.l2_family = AF_BLUETOOTH;
	bacpy(&addr.l2_bdaddr, dst);

	if (connect(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
		if (errno == EAGAIN || errno == EINPROGRESS)
			return sk;
		error("Can't connect socket: %s (%d)", strerror(errno), errno);
		goto failed;
	}

	return sk;

failed:
	close(sk);
	return -1;
}

static gboolean system_bus_reconnect(void *data)
{
	DBusConnection *conn = get_dbus_connection();
	struct hci_dev_list_req *dl = NULL;
	struct hci_dev_req *dr;
	int sk, i;
	gboolean ret_val = TRUE;

	if (conn) {
		if (dbus_connection_get_is_connected(conn))
			return FALSE;
	}

	if (hcid_dbus_init() < 0)
		return TRUE;

	/* Create and bind HCI socket */
	sk = socket(AF_BLUETOOTH, SOCK_RAW, BTPROTO_HCI);
	if (sk < 0) {
		error("Can't open HCI socket: %s (%d)",
				strerror(errno), errno);
		return TRUE;
	}

	dl = g_malloc0(HCI_MAX_DEV * sizeof(*dr) + sizeof(*dl));

	dl->dev_num = HCI_MAX_DEV;
	dr = dl->dev_req;

	if (ioctl(sk, HCIGETDEVLIST, (void *) dl) < 0) {
		info("Can't get device list: %s (%d)",
			strerror(errno), errno);
		goto failed;
	}

	/* reset the default device */
	manager_set_default_adapter(-1);

	/* FIXME: it shouldn't be needed to register adapters again */
	for (i = 0; i < dl->dev_num; i++, dr++)
		manager_register_adapter(dr->dev_id, TRUE);

	ret_val = FALSE;

failed:
	if (sk >= 0)
		close(sk);

	g_free(dl);

	return ret_val;
}

static void disconnect_callback(DBusConnection *conn, void *user_data)
{
	set_dbus_connection(NULL);

	g_timeout_add(RECONNECT_RETRY_TIMEOUT,
				system_bus_reconnect, NULL);
}

void hcid_dbus_unregister(void)
{
	DBusConnection *conn = get_dbus_connection();
	char **children;
	int i;
	uint16_t dev_id;

	if (!conn || !dbus_connection_get_is_connected(conn))
		return;

	/* Unregister all paths in Adapter path hierarchy */
	if (!dbus_connection_list_registered(conn, "/", &children))
		return;

	for (i = 0; children[i]; i++) {
		char path[MAX_PATH_LENGTH];
		struct btd_adapter *adapter;

		if (children[i][0] != 'h')
			continue;

		snprintf(path, sizeof(path), "/%s", children[i]);

		adapter = manager_find_adapter_by_path(path);
		if (!adapter)
			continue;

		dev_id = adapter_get_dev_id(adapter);
		manager_unregister_adapter(dev_id);
	}

	dbus_free_string_array(children);
}

void hcid_dbus_exit(void)
{
	DBusConnection *conn = get_dbus_connection();

	if (!conn || !dbus_connection_get_is_connected(conn))
		return;

	manager_cleanup(conn, "/");

	set_dbus_connection(NULL);

	dbus_connection_unref(conn);
}

int hcid_dbus_init(void)
{
	DBusConnection *conn;

	conn = g_dbus_setup_bus(DBUS_BUS_SYSTEM, BLUEZ_NAME, NULL);
	if (!conn)
		return -1;

	if (g_dbus_set_disconnect_function(conn, disconnect_callback,
							NULL, NULL) == FALSE) {
		dbus_connection_unref(conn);
		return -1;
	}

	if (!manager_init(conn, "/"))
		return -1;

	set_dbus_connection(conn);

	return 0;
}

static void append_variant(DBusMessageIter *iter, int type, void *val)
{
	DBusMessageIter value;
	char sig[2] = { type, '\0' };

	dbus_message_iter_open_container(iter, DBUS_TYPE_VARIANT, sig, &value);

	dbus_message_iter_append_basic(&value, type, val);

	dbus_message_iter_close_container(iter, &value);
}

static void append_array_variant(DBusMessageIter *iter, int type, void *val)
{
	DBusMessageIter variant, array;
	char type_sig[2] = { type, '\0' };
	char array_sig[3] = { DBUS_TYPE_ARRAY, type, '\0' };
	const char ***str_array = val;
	int i;

	dbus_message_iter_open_container(iter, DBUS_TYPE_VARIANT,
						array_sig, &variant);

	dbus_message_iter_open_container(&variant, DBUS_TYPE_ARRAY,
						type_sig, &array);

	for (i = 0; (*str_array)[i]; i++)
		dbus_message_iter_append_basic(&array, type,
						&((*str_array)[i]));

	dbus_message_iter_close_container(&variant, &array);

	dbus_message_iter_close_container(iter, &variant);
}

void dict_append_entry(DBusMessageIter *dict,
			const char *key, int type, void *val)
{
	DBusMessageIter entry;

	if (type == DBUS_TYPE_STRING) {
		const char *str = *((const char **) val);
		if (str == NULL)
			return;
	}

	dbus_message_iter_open_container(dict, DBUS_TYPE_DICT_ENTRY,
							NULL, &entry);

	dbus_message_iter_append_basic(&entry, DBUS_TYPE_STRING, &key);

	append_variant(&entry, type, val);

	dbus_message_iter_close_container(dict, &entry);
}

void dict_append_array(DBusMessageIter *dict, const char *key, int type,
			void *val, int n_elements)
{
	DBusMessageIter entry;

	dbus_message_iter_open_container(dict, DBUS_TYPE_DICT_ENTRY,
						NULL, &entry);

	dbus_message_iter_append_basic(&entry, DBUS_TYPE_STRING, &key);

	append_array_variant(&entry, type, val);

	dbus_message_iter_close_container(dict, &entry);
}

dbus_bool_t emit_property_changed(DBusConnection *conn,
					const char *path,
					const char *interface,
					const char *name,
					int type, void *value)
{
	DBusMessage *signal;
	DBusMessageIter iter;

	signal = dbus_message_new_signal(path, interface, "PropertyChanged");

	if (!signal) {
		error("Unable to allocate new %s.PropertyChanged signal",
				interface);
		return FALSE;
	}

	dbus_message_iter_init_append(signal, &iter);

	dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &name);

	append_variant(&iter, type, value);

	return g_dbus_send_message(conn, signal);
}

dbus_bool_t emit_array_property_changed(DBusConnection *conn,
					const char *path,
					const char *interface,
					const char *name,
					int type, void *value)
{
	DBusMessage *signal;
	DBusMessageIter iter;

	signal = dbus_message_new_signal(path, interface, "PropertyChanged");

	if (!signal) {
		error("Unable to allocate new %s.PropertyChanged signal",
				interface);
		return FALSE;
	}

	dbus_message_iter_init_append(signal, &iter);

	dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &name);

	append_array_variant(&iter, type, value);

	return g_dbus_send_message(conn, signal);
}