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