1/******************************************************************************
2 *
3 *  Copyright (c) 2014 The Android Open Source Project
4 *  Copyright (C) 2003-2012 Broadcom Corporation
5 *
6 *  Licensed under the Apache License, Version 2.0 (the "License");
7 *  you may not use this file except in compliance with the License.
8 *  You may obtain a copy of the License at:
9 *
10 *  http://www.apache.org/licenses/LICENSE-2.0
11 *
12 *  Unless required by applicable law or agreed to in writing, software
13 *  distributed under the License is distributed on an "AS IS" BASIS,
14 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 *  See the License for the specific language governing permissions and
16 *  limitations under the License.
17 *
18 ******************************************************************************/
19
20/******************************************************************************
21 *
22 *  This file contains the audio gateway functions performing SDP
23 *  operations.
24 *
25 ******************************************************************************/
26
27#include <string.h>
28
29#include "bt_utils.h"
30#include "bta_api.h"
31#include "bta_hf_client_api.h"
32#include "bta_hf_client_int.h"
33#include "bta_sys.h"
34#include "osi/include/osi.h"
35
36/* Number of protocol elements in protocol element list. */
37#define BTA_HF_CLIENT_NUM_PROTO_ELEMS 2
38
39/* Number of elements in service class id list. */
40#define BTA_HF_CLIENT_NUM_SVC_ELEMS 2
41
42/*******************************************************************************
43 *
44 * Function         bta_hf_client_sdp_cback
45 *
46 * Description      SDP callback function.
47 *
48 *
49 * Returns          void
50 *
51 ******************************************************************************/
52static void bta_hf_client_sdp_cback(uint16_t status, void* data) {
53  uint16_t event;
54  tBTA_HF_CLIENT_DISC_RESULT* p_buf = (tBTA_HF_CLIENT_DISC_RESULT*)osi_malloc(
55      sizeof(tBTA_HF_CLIENT_DISC_RESULT));
56
57  APPL_TRACE_DEBUG("bta_hf_client_sdp_cback status:0x%x", status);
58  tBTA_HF_CLIENT_CB* client_cb = (tBTA_HF_CLIENT_CB*)data;
59
60  /* set event according to int/acp */
61  if (client_cb->role == BTA_HF_CLIENT_ACP)
62    event = BTA_HF_CLIENT_DISC_ACP_RES_EVT;
63  else
64    event = BTA_HF_CLIENT_DISC_INT_RES_EVT;
65
66  p_buf->hdr.event = event;
67  p_buf->hdr.layer_specific = client_cb->handle;
68  p_buf->status = status;
69
70  bta_sys_sendmsg(p_buf);
71}
72
73/******************************************************************************
74 *
75 * Function         bta_hf_client_add_record
76 *
77 * Description      This function is called by a server application to add
78 *                  HFP Client information to an SDP record.  Prior to
79 *                  calling this function the application must call
80 *                  SDP_CreateRecord() to create an SDP record.
81 *
82 * Returns          true if function execution succeeded,
83 *                  false if function execution failed.
84 *
85 *****************************************************************************/
86bool bta_hf_client_add_record(const char* p_service_name, uint8_t scn,
87                              tBTA_HF_CLIENT_FEAT features,
88                              uint32_t sdp_handle) {
89  tSDP_PROTOCOL_ELEM proto_elem_list[BTA_HF_CLIENT_NUM_PROTO_ELEMS];
90  uint16_t svc_class_id_list[BTA_HF_CLIENT_NUM_SVC_ELEMS];
91  uint16_t browse_list[] = {UUID_SERVCLASS_PUBLIC_BROWSE_GROUP};
92  uint16_t version;
93  uint16_t profile_uuid;
94  bool result = true;
95  uint8_t buf[2];
96  uint16_t sdp_features = 0;
97
98  APPL_TRACE_DEBUG("bta_hf_client_add_record");
99
100  memset(proto_elem_list, 0,
101         BTA_HF_CLIENT_NUM_PROTO_ELEMS * sizeof(tSDP_PROTOCOL_ELEM));
102
103  /* add the protocol element sequence */
104  proto_elem_list[0].protocol_uuid = UUID_PROTOCOL_L2CAP;
105  proto_elem_list[0].num_params = 0;
106  proto_elem_list[1].protocol_uuid = UUID_PROTOCOL_RFCOMM;
107  proto_elem_list[1].num_params = 1;
108  proto_elem_list[1].params[0] = scn;
109  result &= SDP_AddProtocolList(sdp_handle, BTA_HF_CLIENT_NUM_PROTO_ELEMS,
110                                proto_elem_list);
111
112  /* add service class id list */
113  svc_class_id_list[0] = UUID_SERVCLASS_HF_HANDSFREE;
114  svc_class_id_list[1] = UUID_SERVCLASS_GENERIC_AUDIO;
115  result &= SDP_AddServiceClassIdList(sdp_handle, BTA_HF_CLIENT_NUM_SVC_ELEMS,
116                                      svc_class_id_list);
117
118  /* add profile descriptor list */
119  profile_uuid = UUID_SERVCLASS_HF_HANDSFREE;
120  version = HFP_VERSION_1_6;
121
122  result &= SDP_AddProfileDescriptorList(sdp_handle, profile_uuid, version);
123
124  /* add service name */
125  if (p_service_name != NULL && p_service_name[0] != 0) {
126    result &= SDP_AddAttribute(
127        sdp_handle, ATTR_ID_SERVICE_NAME, TEXT_STR_DESC_TYPE,
128        (uint32_t)(strlen(p_service_name) + 1), (uint8_t*)p_service_name);
129  }
130
131  /* add features */
132  if (features & BTA_HF_CLIENT_FEAT_ECNR)
133    sdp_features |= BTA_HF_CLIENT_FEAT_ECNR;
134
135  if (features & BTA_HF_CLIENT_FEAT_3WAY)
136    sdp_features |= BTA_HF_CLIENT_FEAT_3WAY;
137
138  if (features & BTA_HF_CLIENT_FEAT_CLI) sdp_features |= BTA_HF_CLIENT_FEAT_CLI;
139
140  if (features & BTA_HF_CLIENT_FEAT_VREC)
141    sdp_features |= BTA_HF_CLIENT_FEAT_VREC;
142
143  if (features & BTA_HF_CLIENT_FEAT_VOL) sdp_features |= BTA_HF_CLIENT_FEAT_VOL;
144
145  /* Codec bit position is different in SDP (bit 5) and in BRSF (bit 7) */
146  if (features & BTA_HF_CLIENT_FEAT_CODEC) sdp_features |= 0x0020;
147
148  UINT16_TO_BE_FIELD(buf, sdp_features);
149  result &= SDP_AddAttribute(sdp_handle, ATTR_ID_SUPPORTED_FEATURES,
150                             UINT_DESC_TYPE, 2, buf);
151
152  /* add browse group list */
153  result &= SDP_AddUuidSequence(sdp_handle, ATTR_ID_BROWSE_GROUP_LIST, 1,
154                                browse_list);
155
156  return result;
157}
158
159/*******************************************************************************
160 *
161 * Function         bta_hf_client_create_record
162 *
163 * Description      Create SDP record for registered service.
164 *
165 *
166 * Returns          void
167 *
168 ******************************************************************************/
169void bta_hf_client_create_record(tBTA_HF_CLIENT_CB_ARR* client_cb_arr,
170                                 const char* p_service_name) {
171  /* add sdp record if not already registered */
172  if (client_cb_arr->sdp_handle == 0) {
173    client_cb_arr->sdp_handle = SDP_CreateRecord();
174    client_cb_arr->scn = BTM_AllocateSCN();
175    bta_hf_client_add_record(p_service_name, client_cb_arr->scn,
176                             client_cb_arr->features,
177                             client_cb_arr->sdp_handle);
178
179    bta_sys_add_uuid(UUID_SERVCLASS_HF_HANDSFREE);
180  }
181}
182
183/*******************************************************************************
184 *
185 * Function         bta_hf_client_del_record
186 *
187 * Description      Delete SDP record for registered service.
188 *
189 *
190 * Returns          void
191 *
192 ******************************************************************************/
193void bta_hf_client_del_record(tBTA_HF_CLIENT_CB_ARR* client_cb) {
194  APPL_TRACE_DEBUG("%s", __func__);
195
196  if (client_cb->sdp_handle != 0) {
197    SDP_DeleteRecord(client_cb->sdp_handle);
198    client_cb->sdp_handle = 0;
199    BTM_FreeSCN(client_cb->scn);
200    BTM_SecClrService(BTM_SEC_SERVICE_HF_HANDSFREE);
201    bta_sys_remove_uuid(UUID_SERVCLASS_HF_HANDSFREE);
202  }
203}
204
205/*******************************************************************************
206 *
207 * Function         bta_hf_client_sdp_find_attr
208 *
209 * Description      Process SDP discovery results to find requested attribute
210 *
211 *
212 * Returns          true if results found, false otherwise.
213 *
214 ******************************************************************************/
215bool bta_hf_client_sdp_find_attr(tBTA_HF_CLIENT_CB* client_cb) {
216  tSDP_DISC_REC* p_rec = NULL;
217  tSDP_DISC_ATTR* p_attr;
218  tSDP_PROTOCOL_ELEM pe;
219  bool result = false;
220
221  client_cb->peer_version = HFP_VERSION_1_1; /* Default version */
222
223  /* loop through all records we found */
224  while (true) {
225    /* get next record; if none found, we're done */
226    p_rec = SDP_FindServiceInDb(client_cb->p_disc_db,
227                                UUID_SERVCLASS_AG_HANDSFREE, p_rec);
228    if (p_rec == NULL) {
229      break;
230    }
231
232    /* get scn from proto desc list if initiator */
233    if (client_cb->role == BTA_HF_CLIENT_INT) {
234      if (SDP_FindProtocolListElemInRec(p_rec, UUID_PROTOCOL_RFCOMM, &pe)) {
235        client_cb->peer_scn = (uint8_t)pe.params[0];
236      } else {
237        continue;
238      }
239    }
240
241    /* get profile version (if failure, version parameter is not updated) */
242    SDP_FindProfileVersionInRec(p_rec, UUID_SERVCLASS_HF_HANDSFREE,
243                                &client_cb->peer_version);
244
245    /* get features */
246    p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_SUPPORTED_FEATURES);
247    if (p_attr != NULL) {
248      /* Found attribute. Get value. */
249      /* There might be race condition between SDP and BRSF.  */
250      /* Do not update if we already received BRSF.           */
251      if (client_cb->peer_features == 0) {
252        client_cb->peer_features = p_attr->attr_value.v.u16;
253
254        /* SDP and BRSF WBS bit are different, correct it if set */
255        if (client_cb->peer_features & 0x0020) {
256          client_cb->peer_features &= ~0x0020;
257          client_cb->peer_features |= BTA_HF_CLIENT_PEER_CODEC;
258        }
259
260        /* get network for ability to reject calls */
261        p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_NETWORK);
262        if (p_attr != NULL) {
263          if (p_attr->attr_value.v.u16 == 0x01) {
264            client_cb->peer_features |= BTA_HF_CLIENT_PEER_REJECT;
265          }
266        }
267      }
268    }
269
270    /* found what we needed */
271    result = true;
272    break;
273  }
274
275  APPL_TRACE_DEBUG("%s: peer_version=0x%x peer_features=0x%x", __func__,
276                   client_cb->peer_version, client_cb->peer_features);
277
278  return result;
279}
280
281/*******************************************************************************
282 *
283 * Function         bta_hf_client_do_disc
284 *
285 * Description      Do service discovery.
286 *
287 *
288 * Returns          void
289 *
290 ******************************************************************************/
291void bta_hf_client_do_disc(tBTA_HF_CLIENT_CB* client_cb) {
292  tSDP_UUID uuid_list[2];
293  uint16_t num_uuid = 1;
294  uint16_t attr_list[4];
295  uint8_t num_attr;
296  bool db_inited = false;
297
298  /* initiator; get proto list and features */
299  if (client_cb->role == BTA_HF_CLIENT_INT) {
300    attr_list[0] = ATTR_ID_SERVICE_CLASS_ID_LIST;
301    attr_list[1] = ATTR_ID_PROTOCOL_DESC_LIST;
302    attr_list[2] = ATTR_ID_BT_PROFILE_DESC_LIST;
303    attr_list[3] = ATTR_ID_SUPPORTED_FEATURES;
304    num_attr = 4;
305    uuid_list[0].uu.uuid16 = UUID_SERVCLASS_AG_HANDSFREE;
306  }
307  /* acceptor; get features */
308  else {
309    attr_list[0] = ATTR_ID_SERVICE_CLASS_ID_LIST;
310    attr_list[1] = ATTR_ID_BT_PROFILE_DESC_LIST;
311    attr_list[2] = ATTR_ID_SUPPORTED_FEATURES;
312    num_attr = 3;
313    uuid_list[0].uu.uuid16 = UUID_SERVCLASS_AG_HANDSFREE;
314  }
315
316  /* allocate buffer for sdp database */
317  client_cb->p_disc_db = (tSDP_DISCOVERY_DB*)osi_malloc(BT_DEFAULT_BUFFER_SIZE);
318
319  /* set up service discovery database; attr happens to be attr_list len */
320  uuid_list[0].len = LEN_UUID_16;
321  uuid_list[1].len = LEN_UUID_16;
322  db_inited = SDP_InitDiscoveryDb(client_cb->p_disc_db, BT_DEFAULT_BUFFER_SIZE,
323                                  num_uuid, uuid_list, num_attr, attr_list);
324
325  if (db_inited) {
326    /*Service discovery not initiated */
327    db_inited = SDP_ServiceSearchAttributeRequest2(
328        client_cb->peer_addr, client_cb->p_disc_db, bta_hf_client_sdp_cback,
329        (void*)client_cb);
330  }
331
332  if (!db_inited) {
333    /*free discover db */
334    bta_hf_client_free_db(NULL);
335    /* sent failed event */
336    tBTA_HF_CLIENT_DATA msg;
337    msg.hdr.layer_specific = client_cb->handle;
338    bta_hf_client_sm_execute(BTA_HF_CLIENT_DISC_FAIL_EVT, &msg);
339  }
340}
341
342/*******************************************************************************
343 *
344 * Function         bta_hf_client_free_db
345 *
346 * Description      Free discovery database.
347 *
348 *
349 * Returns          void
350 *
351 ******************************************************************************/
352void bta_hf_client_free_db(tBTA_HF_CLIENT_DATA* p_data) {
353  tBTA_HF_CLIENT_CB* client_cb =
354      bta_hf_client_find_cb_by_handle(p_data->hdr.layer_specific);
355  if (client_cb == NULL) {
356    APPL_TRACE_ERROR("%s: cb not found for handle %d", __func__,
357                     p_data->hdr.layer_specific);
358    return;
359  }
360
361  osi_free_and_reset((void**)&client_cb->p_disc_db);
362}
363