1 /*
2 *
3 * BlueZ - Bluetooth protocol stack for Linux
4 *
5 * Copyright (C) 2001-2002 Nokia Corporation
6 * Copyright (C) 2002-2003 Maxim Krasnyansky <maxk@qualcomm.com>
7 * Copyright (C) 2002-2009 Marcel Holtmann <marcel@holtmann.org>
8 * Copyright (C) 2002-2003 Stephen Crane <steve.crane@rococosoft.com>
9 *
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
24 *
25 */
26
27 #ifdef HAVE_CONFIG_H
28 #include <config.h>
29 #endif
30
31 #include <stdio.h>
32 #include <errno.h>
33 #include <stdlib.h>
34 #include <sys/socket.h>
35
36 #include <bluetooth/bluetooth.h>
37 #include <bluetooth/l2cap.h>
38 #include <bluetooth/sdp.h>
39 #include <bluetooth/sdp_lib.h>
40
41 #include "sdpd.h"
42 #include "logging.h"
43
44 static sdp_list_t *service_db;
45 static sdp_list_t *access_db;
46
47 typedef struct {
48 uint32_t handle;
49 bdaddr_t device;
50 } sdp_access_t;
51
52 /*
53 * Ordering function called when inserting a service record.
54 * The service repository is a linked list in sorted order
55 * and the service record handle is the sort key
56 */
record_sort(const void * r1,const void * r2)57 static int record_sort(const void *r1, const void *r2)
58 {
59 const sdp_record_t *rec1 = (const sdp_record_t *) r1;
60 const sdp_record_t *rec2 = (const sdp_record_t *) r2;
61
62 if (!rec1 || !rec2) {
63 error("NULL RECORD LIST FATAL");
64 return -1;
65 }
66
67 return rec1->handle - rec2->handle;
68 }
69
access_sort(const void * r1,const void * r2)70 static int access_sort(const void *r1, const void *r2)
71 {
72 const sdp_access_t *rec1 = (const sdp_access_t *) r1;
73 const sdp_access_t *rec2 = (const sdp_access_t *) r2;
74
75 if (!rec1 || !rec2) {
76 error("NULL RECORD LIST FATAL");
77 return -1;
78 }
79
80 return rec1->handle - rec2->handle;
81 }
82
access_free(void * p)83 static void access_free(void *p)
84 {
85 free(p);
86 }
87
88 /*
89 * Reset the service repository by deleting its contents
90 */
sdp_svcdb_reset()91 void sdp_svcdb_reset()
92 {
93 sdp_list_free(service_db, (sdp_free_func_t) sdp_record_free);
94 sdp_list_free(access_db, access_free);
95 }
96
97 typedef struct _indexed {
98 int sock;
99 sdp_record_t *record;
100 } sdp_indexed_t;
101
102 static sdp_list_t *socket_index;
103
104 /*
105 * collect all services registered over this socket
106 */
sdp_svcdb_collect_all(int sock)107 void sdp_svcdb_collect_all(int sock)
108 {
109 sdp_list_t *p, *q;
110
111 for (p = socket_index, q = 0; p; ) {
112 sdp_indexed_t *item = (sdp_indexed_t *) p->data;
113 if (item->sock == sock) {
114 sdp_list_t *next = p->next;
115 sdp_record_remove(item->record->handle);
116 sdp_record_free(item->record);
117 free(item);
118 if (q)
119 q->next = next;
120 else
121 socket_index = next;
122 free(p);
123 p = next;
124 } else if (item->sock > sock)
125 return;
126 else {
127 q = p;
128 p = p->next;
129 }
130 }
131 }
132
sdp_svcdb_collect(sdp_record_t * rec)133 void sdp_svcdb_collect(sdp_record_t *rec)
134 {
135 sdp_list_t *p, *q;
136
137 for (p = socket_index, q = 0; p; q = p, p = p->next) {
138 sdp_indexed_t *item = (sdp_indexed_t *) p->data;
139 if (rec == item->record) {
140 free(item);
141 if (q)
142 q->next = p->next;
143 else
144 socket_index = p->next;
145 free(p);
146 return;
147 }
148 }
149 }
150
compare_indices(const void * i1,const void * i2)151 static int compare_indices(const void *i1, const void *i2)
152 {
153 const sdp_indexed_t *s1 = (const sdp_indexed_t *) i1;
154 const sdp_indexed_t *s2 = (const sdp_indexed_t *) i2;
155 return s1->sock - s2->sock;
156 }
157
sdp_svcdb_set_collectable(sdp_record_t * record,int sock)158 void sdp_svcdb_set_collectable(sdp_record_t *record, int sock)
159 {
160 sdp_indexed_t *item = malloc(sizeof(sdp_indexed_t));
161 item->sock = sock;
162 item->record = record;
163 socket_index = sdp_list_insert_sorted(socket_index, item, compare_indices);
164 }
165
166 /*
167 * Add a service record to the repository
168 */
sdp_record_add(const bdaddr_t * device,sdp_record_t * rec)169 void sdp_record_add(const bdaddr_t *device, sdp_record_t *rec)
170 {
171 sdp_access_t *dev;
172
173 SDPDBG("Adding rec : 0x%lx", (long) rec);
174 SDPDBG("with handle : 0x%x", rec->handle);
175
176 service_db = sdp_list_insert_sorted(service_db, rec, record_sort);
177
178 dev = malloc(sizeof(*dev));
179 if (!dev)
180 return;
181
182 bacpy(&dev->device, device);
183 dev->handle = rec->handle;
184
185 access_db = sdp_list_insert_sorted(access_db, dev, access_sort);
186 }
187
record_locate(uint32_t handle)188 static sdp_list_t *record_locate(uint32_t handle)
189 {
190 if (service_db) {
191 sdp_list_t *p;
192 sdp_record_t r;
193
194 r.handle = handle;
195 p = sdp_list_find(service_db, &r, record_sort);
196 return p;
197 }
198
199 SDPDBG("Could not find svcRec for : 0x%x", handle);
200 return NULL;
201 }
202
access_locate(uint32_t handle)203 static sdp_list_t *access_locate(uint32_t handle)
204 {
205 if (access_db) {
206 sdp_list_t *p;
207 sdp_access_t a;
208
209 a.handle = handle;
210 p = sdp_list_find(access_db, &a, access_sort);
211 return p;
212 }
213
214 SDPDBG("Could not find access data for : 0x%x", handle);
215 return NULL;
216 }
217
218 /*
219 * Given a service record handle, find the record associated with it.
220 */
sdp_record_find(uint32_t handle)221 sdp_record_t *sdp_record_find(uint32_t handle)
222 {
223 sdp_list_t *p = record_locate(handle);
224
225 if (!p) {
226 SDPDBG("Couldn't find record for : 0x%x", handle);
227 return 0;
228 }
229
230 return (sdp_record_t *) p->data;
231 }
232
233 /*
234 * Given a service record handle, remove its record from the repository
235 */
sdp_record_remove(uint32_t handle)236 int sdp_record_remove(uint32_t handle)
237 {
238 sdp_list_t *p = record_locate(handle);
239 sdp_record_t *r;
240 sdp_access_t *a;
241
242 if (!p) {
243 error("Remove : Couldn't find record for : 0x%x", handle);
244 return -1;
245 }
246
247 r = (sdp_record_t *) p->data;
248 if (r)
249 service_db = sdp_list_remove(service_db, r);
250
251 p = access_locate(handle);
252 if (p) {
253 a = (sdp_access_t *) p->data;
254 if (a) {
255 access_db = sdp_list_remove(access_db, a);
256 access_free(a);
257 }
258 }
259
260 return 0;
261 }
262
263 /*
264 * Return a pointer to the linked list containing the records in sorted order
265 */
sdp_get_record_list(void)266 sdp_list_t *sdp_get_record_list(void)
267 {
268 return service_db;
269 }
270
sdp_get_access_list(void)271 sdp_list_t *sdp_get_access_list(void)
272 {
273 return access_db;
274 }
275
sdp_check_access(uint32_t handle,bdaddr_t * device)276 int sdp_check_access(uint32_t handle, bdaddr_t *device)
277 {
278 sdp_list_t *p = access_locate(handle);
279 sdp_access_t *a;
280
281 if (!p)
282 return 1;
283
284 a = (sdp_access_t *) p->data;
285 if (!a)
286 return 1;
287
288 if (bacmp(&a->device, device) &&
289 bacmp(&a->device, BDADDR_ANY) &&
290 bacmp(device, BDADDR_ANY))
291 return 0;
292
293 return 1;
294 }
295
sdp_next_handle(void)296 uint32_t sdp_next_handle(void)
297 {
298 uint32_t handle = 0x10000;
299
300 while (sdp_record_find(handle))
301 handle++;
302
303 return handle;
304 }
305