/****************************************************************************** * * Copyright 2003-2012 Broadcom Corporation * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * ******************************************************************************/ /****************************************************************************** * * This file contains the audio gateway functions performing SDP * operations. * ******************************************************************************/ #include <cstring> #include <base/bind.h> #include "bt_common.h" #include "bta_ag_api.h" #include "bta_ag_int.h" #include "bta_api.h" #include "bta_sys.h" #include "btif_config.h" #include "btm_api.h" #include "osi/include/osi.h" #include "sdp_api.h" #include "stack/include/btu.h" #include "utl.h" using bluetooth::Uuid; /* Number of protocol elements in protocol element list. */ #define BTA_AG_NUM_PROTO_ELEMS 2 /* Number of elements in service class id list. */ #define BTA_AG_NUM_SVC_ELEMS 2 /* size of database for service discovery */ #ifndef BTA_AG_DISC_BUF_SIZE #define BTA_AG_DISC_BUF_SIZE BT_DEFAULT_BUFFER_SIZE #endif /* declare sdp callback functions */ void bta_ag_sdp_cback_1(uint16_t status); void bta_ag_sdp_cback_2(uint16_t status); void bta_ag_sdp_cback_3(uint16_t status); void bta_ag_sdp_cback_4(uint16_t status); void bta_ag_sdp_cback_5(uint16_t status); void bta_ag_sdp_cback_6(uint16_t status); /* SDP callback function table */ typedef tSDP_DISC_CMPL_CB* tBTA_AG_SDP_CBACK; const tBTA_AG_SDP_CBACK bta_ag_sdp_cback_tbl[] = { bta_ag_sdp_cback_1, bta_ag_sdp_cback_2, bta_ag_sdp_cback_3, bta_ag_sdp_cback_4, bta_ag_sdp_cback_5, bta_ag_sdp_cback_6}; /******************************************************************************* * * Function bta_ag_sdp_cback * * Description SDP callback function. * * * Returns void * ******************************************************************************/ static void bta_ag_sdp_cback(uint16_t status, uint8_t idx) { APPL_TRACE_DEBUG("%s status:0x%x", __func__, status); tBTA_AG_SCB* p_scb = bta_ag_scb_by_idx(idx); if (p_scb) { uint16_t event; /* set event according to int/acp */ if (p_scb->role == BTA_AG_ACP) { event = BTA_AG_DISC_ACP_RES_EVT; } else { event = BTA_AG_DISC_INT_RES_EVT; } tBTA_AG_DATA disc_result = {.disc_result.status = status}; do_in_main_thread(FROM_HERE, base::Bind(&bta_ag_sm_execute_by_handle, idx, event, disc_result)); } } /******************************************************************************* * * Function bta_ag_sdp_cback_1 to 6 * * Description SDP callback functions. Since there is no way to * distinguish scb from the callback we need separate * callbacks for each scb. * * * Returns void * ******************************************************************************/ void bta_ag_sdp_cback_1(uint16_t status) { bta_ag_sdp_cback(status, 1); } void bta_ag_sdp_cback_2(uint16_t status) { bta_ag_sdp_cback(status, 2); } void bta_ag_sdp_cback_3(uint16_t status) { bta_ag_sdp_cback(status, 3); } void bta_ag_sdp_cback_4(uint16_t status) { bta_ag_sdp_cback(status, 4); } void bta_ag_sdp_cback_5(uint16_t status) { bta_ag_sdp_cback(status, 5); } void bta_ag_sdp_cback_6(uint16_t status) { bta_ag_sdp_cback(status, 6); } /****************************************************************************** * * Function bta_ag_add_record * * Description This function is called by a server application to add * HSP or HFP information to an SDP record. Prior to * calling this function the application must call * SDP_CreateRecord() to create an SDP record. * * Returns true if function execution succeeded, * false if function execution failed. * *****************************************************************************/ bool bta_ag_add_record(uint16_t service_uuid, const char* p_service_name, uint8_t scn, tBTA_AG_FEAT features, uint32_t sdp_handle) { tSDP_PROTOCOL_ELEM proto_elem_list[BTA_AG_NUM_PROTO_ELEMS]; uint16_t svc_class_id_list[BTA_AG_NUM_SVC_ELEMS]; uint16_t browse_list[] = {UUID_SERVCLASS_PUBLIC_BROWSE_GROUP}; uint16_t version; uint16_t profile_uuid; uint8_t network; bool result = true; bool codec_supported = false; uint8_t buf[2]; APPL_TRACE_DEBUG("%s uuid: %x", __func__, service_uuid); for (auto& proto_element : proto_elem_list) { proto_element = {}; } /* add the protocol element sequence */ proto_elem_list[0].protocol_uuid = UUID_PROTOCOL_L2CAP; proto_elem_list[0].num_params = 0; proto_elem_list[1].protocol_uuid = UUID_PROTOCOL_RFCOMM; proto_elem_list[1].num_params = 1; proto_elem_list[1].params[0] = scn; result &= SDP_AddProtocolList(sdp_handle, BTA_AG_NUM_PROTO_ELEMS, proto_elem_list); /* add service class id list */ svc_class_id_list[0] = service_uuid; svc_class_id_list[1] = UUID_SERVCLASS_GENERIC_AUDIO; result &= SDP_AddServiceClassIdList(sdp_handle, BTA_AG_NUM_SVC_ELEMS, svc_class_id_list); /* add profile descriptor list */ if (service_uuid == UUID_SERVCLASS_AG_HANDSFREE) { profile_uuid = UUID_SERVCLASS_HF_HANDSFREE; version = BTA_HFP_VERSION; } else { profile_uuid = UUID_SERVCLASS_HEADSET; version = HSP_VERSION_1_2; } result &= SDP_AddProfileDescriptorList(sdp_handle, profile_uuid, version); /* add service name */ if (p_service_name != nullptr && p_service_name[0] != 0) { result &= SDP_AddAttribute( sdp_handle, ATTR_ID_SERVICE_NAME, TEXT_STR_DESC_TYPE, (uint32_t)(strlen(p_service_name) + 1), (uint8_t*)p_service_name); } /* add features and network */ if (service_uuid == UUID_SERVCLASS_AG_HANDSFREE) { network = (features & BTA_AG_FEAT_REJECT) ? 1 : 0; result &= SDP_AddAttribute(sdp_handle, ATTR_ID_DATA_STORES_OR_NETWORK, UINT_DESC_TYPE, 1, &network); if (features & BTA_AG_FEAT_CODEC) codec_supported = true; features &= BTA_AG_SDP_FEAT_SPEC; /* Codec bit position is different in SDP and in BRSF */ if (codec_supported) features |= 0x0020; UINT16_TO_BE_FIELD(buf, features); result &= SDP_AddAttribute(sdp_handle, ATTR_ID_SUPPORTED_FEATURES, UINT_DESC_TYPE, 2, buf); } /* add browse group list */ result &= SDP_AddUuidSequence(sdp_handle, ATTR_ID_BROWSE_GROUP_LIST, 1, browse_list); return result; } /******************************************************************************* * * Function bta_ag_create_records * * Description Create SDP records for registered services. * * * Returns void * ******************************************************************************/ void bta_ag_create_records(tBTA_AG_SCB* p_scb, const tBTA_AG_DATA& data) { int i; tBTA_SERVICE_MASK services; services = p_scb->reg_services >> BTA_HSP_SERVICE_ID; for (i = 0; i < BTA_AG_NUM_IDX && services != 0; i++, services >>= 1) { /* if service is set in mask */ if (services & 1) { /* add sdp record if not already registered */ if (bta_ag_cb.profile[i].sdp_handle == 0) { bta_ag_cb.profile[i].sdp_handle = SDP_CreateRecord(); bta_ag_cb.profile[i].scn = BTM_AllocateSCN(); bta_ag_add_record(bta_ag_uuid[i], data.api_register.p_name[i], bta_ag_cb.profile[i].scn, data.api_register.features, bta_ag_cb.profile[i].sdp_handle); bta_sys_add_uuid(bta_ag_uuid[i]); } } } } /******************************************************************************* * * Function bta_ag_del_records * * Description Delete SDP records for any registered services. * * * Returns void * ******************************************************************************/ void bta_ag_del_records(tBTA_AG_SCB* p_scb) { tBTA_AG_SCB* p = &bta_ag_cb.scb[0]; tBTA_SERVICE_MASK services; tBTA_SERVICE_MASK others = 0; int i; /* get services of all other registered servers */ for (i = 0; i < BTA_AG_NUM_IDX; i++, p++) { if (p_scb == p) { continue; } if (p->in_use && !p->dealloc) { others |= p->reg_services; } } others >>= BTA_HSP_SERVICE_ID; services = p_scb->reg_services >> BTA_HSP_SERVICE_ID; for (i = 0; i < BTA_AG_NUM_IDX && services != 0; i++, services >>= 1, others >>= 1) { /* if service registered for this scb and not registered for any other scb */ if (((services & 1) == 1) && ((others & 1) == 0)) { APPL_TRACE_DEBUG("bta_ag_del_records %d", i); if (bta_ag_cb.profile[i].sdp_handle != 0) { SDP_DeleteRecord(bta_ag_cb.profile[i].sdp_handle); bta_ag_cb.profile[i].sdp_handle = 0; } BTM_FreeSCN(bta_ag_cb.profile[i].scn); BTM_SecClrService(bta_ag_sec_id[i]); bta_sys_remove_uuid(bta_ag_uuid[i]); } } } /******************************************************************************* * * Function bta_ag_sdp_find_attr * * Description Process SDP discovery results to find requested attributes * for requested service. * * * Returns true if results found, false otherwise. * ******************************************************************************/ bool bta_ag_sdp_find_attr(tBTA_AG_SCB* p_scb, tBTA_SERVICE_MASK service) { tSDP_DISC_REC* p_rec = nullptr; tSDP_DISC_ATTR* p_attr; tSDP_PROTOCOL_ELEM pe; uint16_t uuid; bool result = false; if (service & BTA_HFP_SERVICE_MASK) { uuid = UUID_SERVCLASS_HF_HANDSFREE; /* If there is no cached peer version, use default one */ if (p_scb->peer_version == HFP_HSP_VERSION_UNKNOWN) { p_scb->peer_version = HFP_VERSION_1_1; /* Default version */ } } else if (service & BTA_HSP_SERVICE_MASK && p_scb->role == BTA_AG_INT) { uuid = UUID_SERVCLASS_HEADSET_HS; p_scb->peer_version = HSP_VERSION_1_2; /* Default version */ } else { uuid = UUID_SERVCLASS_HEADSET_HS; p_scb->peer_version = HSP_VERSION_1_0; } /* loop through all records we found */ while (true) { /* get next record; if none found, we're done */ p_rec = SDP_FindServiceInDb(p_scb->p_disc_db, uuid, p_rec); if (p_rec == nullptr) { if (uuid == UUID_SERVCLASS_HEADSET_HS) { /* Search again in case the peer device uses the old HSP UUID */ uuid = UUID_SERVCLASS_HEADSET; p_scb->peer_version = HSP_VERSION_1_0; p_rec = SDP_FindServiceInDb(p_scb->p_disc_db, uuid, p_rec); if (p_rec == nullptr) { break; } } else break; } /* get scn from proto desc list if initiator */ if (p_scb->role == BTA_AG_INT) { if (SDP_FindProtocolListElemInRec(p_rec, UUID_PROTOCOL_RFCOMM, &pe)) { p_scb->peer_scn = (uint8_t)pe.params[0]; } else { continue; } } /* get profile version (if failure, version parameter is not updated) */ uint16_t peer_version = HFP_HSP_VERSION_UNKNOWN; if (!SDP_FindProfileVersionInRec(p_rec, uuid, &peer_version)) { APPL_TRACE_WARNING("%s: Get peer_version failed, using default 0x%04x", __func__, p_scb->peer_version); peer_version = p_scb->peer_version; } if (service & BTA_HFP_SERVICE_MASK) { /* Update cached peer version if the new one is different */ if (peer_version != p_scb->peer_version) { p_scb->peer_version = peer_version; if (btif_config_set_bin( p_scb->peer_addr.ToString(), HFP_VERSION_CONFIG_KEY, (const uint8_t*)&peer_version, sizeof(peer_version))) { btif_config_save(); } else { APPL_TRACE_WARNING("%s: Failed to store peer HFP version for %s", __func__, p_scb->peer_addr.ToString().c_str()); } } /* get features if HFP */ p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_SUPPORTED_FEATURES); if (p_attr != nullptr) { /* Found attribute. Get value. */ /* There might be race condition between SDP and BRSF. */ /* Do not update if we already received BRSF. */ uint16_t sdp_features = p_attr->attr_value.v.u16; bool sdp_wbs_support = sdp_features & BTA_AG_FEAT_WBS_SUPPORT; if (!p_scb->received_at_bac && sdp_wbs_support) { // Workaround for misbehaving HFs (e.g. some Hyundai car kit) that: // 1. Indicate WBS support in SDP and codec negotiation in BRSF // 2. But do not send required AT+BAC command // Will assume mSBC is enabled and try codec negotiation by default p_scb->codec_updated = true; p_scb->peer_codecs = BTA_AG_CODEC_CVSD & BTA_AG_CODEC_MSBC; p_scb->sco_codec = UUID_CODEC_MSBC; } if (sdp_features != p_scb->peer_sdp_features) { p_scb->peer_sdp_features = sdp_features; if (btif_config_set_bin( p_scb->peer_addr.ToString(), HFP_SDP_FEATURES_CONFIG_KEY, (const uint8_t*)&sdp_features, sizeof(sdp_features))) { btif_config_save(); } else { APPL_TRACE_WARNING( "%s: Failed to store peer HFP SDP Features for %s", __func__, p_scb->peer_addr.ToString().c_str()); } } if (p_scb->peer_features == 0) { p_scb->peer_features = sdp_features & HFP_SDP_BRSF_FEATURES_MASK; } } } else { /* No peer version caching for HSP, use discovered one directly */ p_scb->peer_version = peer_version; /* get features if HSP */ p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_REMOTE_AUDIO_VOLUME_CONTROL); if (p_attr != nullptr) { /* Remote volume control of HSP */ if (p_attr->attr_value.v.u8) p_scb->peer_features |= BTA_AG_PEER_FEAT_VOL; else p_scb->peer_features &= ~BTA_AG_PEER_FEAT_VOL; } } /* found what we needed */ result = true; break; } return result; } /******************************************************************************* * * Function bta_ag_do_disc * * Description Do service discovery. * * * Returns void * ******************************************************************************/ void bta_ag_do_disc(tBTA_AG_SCB* p_scb, tBTA_SERVICE_MASK service) { Uuid uuid_list[1]; uint16_t num_uuid = 1; uint16_t attr_list[4]; uint8_t num_attr; /* HFP initiator; get proto list and features */ if (service & BTA_HFP_SERVICE_MASK && p_scb->role == BTA_AG_INT) { attr_list[0] = ATTR_ID_SERVICE_CLASS_ID_LIST; attr_list[1] = ATTR_ID_PROTOCOL_DESC_LIST; attr_list[2] = ATTR_ID_BT_PROFILE_DESC_LIST; attr_list[3] = ATTR_ID_SUPPORTED_FEATURES; num_attr = 4; uuid_list[0] = Uuid::From16Bit(UUID_SERVCLASS_HF_HANDSFREE); } /* HFP acceptor; get features */ else if (service & BTA_HFP_SERVICE_MASK && p_scb->role == BTA_AG_ACP) { attr_list[0] = ATTR_ID_SERVICE_CLASS_ID_LIST; attr_list[1] = ATTR_ID_BT_PROFILE_DESC_LIST; attr_list[2] = ATTR_ID_SUPPORTED_FEATURES; num_attr = 3; uuid_list[0] = Uuid::From16Bit(UUID_SERVCLASS_HF_HANDSFREE); } /* HSP initiator; get proto list */ else if (service & BTA_HSP_SERVICE_MASK && p_scb->role == BTA_AG_INT) { attr_list[0] = ATTR_ID_SERVICE_CLASS_ID_LIST; attr_list[1] = ATTR_ID_PROTOCOL_DESC_LIST; attr_list[2] = ATTR_ID_BT_PROFILE_DESC_LIST; attr_list[3] = ATTR_ID_REMOTE_AUDIO_VOLUME_CONTROL; num_attr = 4; // Although UUID_SERVCLASS_HEADSET_HS (0x1131) is to be used in HSP 1.2, // some HSP 1.2 implementations, such as PTS, still use // UUID_SERVCLASS_HEADSET (0x1108) to store its service record. However, // most of such devices are HSP 1.0 devices. if (p_scb->hsp_version >= HSP_VERSION_1_2) { uuid_list[0] = Uuid::From16Bit(UUID_SERVCLASS_HEADSET_HS); } else { uuid_list[0] = Uuid::From16Bit(UUID_SERVCLASS_HEADSET); } } else { /* HSP acceptor; get features */ attr_list[0] = ATTR_ID_SERVICE_CLASS_ID_LIST; attr_list[1] = ATTR_ID_PROTOCOL_DESC_LIST; attr_list[2] = ATTR_ID_BT_PROFILE_DESC_LIST; attr_list[3] = ATTR_ID_REMOTE_AUDIO_VOLUME_CONTROL; num_attr = 4; if (p_scb->hsp_version >= HSP_VERSION_1_2) { uuid_list[0] = Uuid::From16Bit(UUID_SERVCLASS_HEADSET_HS); } else { /* Legacy from HSP v1.0 */ uuid_list[0] = Uuid::From16Bit(UUID_SERVCLASS_HEADSET); } } /* allocate buffer for sdp database */ p_scb->p_disc_db = (tSDP_DISCOVERY_DB*)osi_malloc(BTA_AG_DISC_BUF_SIZE); /* set up service discovery database; attr happens to be attr_list len */ if (SDP_InitDiscoveryDb(p_scb->p_disc_db, BTA_AG_DISC_BUF_SIZE, num_uuid, uuid_list, num_attr, attr_list)) { if (SDP_ServiceSearchAttributeRequest( p_scb->peer_addr, p_scb->p_disc_db, bta_ag_sdp_cback_tbl[bta_ag_scb_to_idx(p_scb) - 1])) { return; } else { LOG(ERROR) << __func__ << ": failed to start SDP discovery for " << p_scb->peer_addr; } } else { LOG(ERROR) << __func__ << ": failed to init SDP discovery database for " << p_scb->peer_addr; } // Failure actions bta_ag_free_db(p_scb, tBTA_AG_DATA::kEmpty); bta_ag_sm_execute(p_scb, BTA_AG_DISC_FAIL_EVT, tBTA_AG_DATA::kEmpty); } /******************************************************************************* * * Function bta_ag_free_db * * Description Free discovery database. * * * Returns void * ******************************************************************************/ void bta_ag_free_db(tBTA_AG_SCB* p_scb, const tBTA_AG_DATA& data) { osi_free_and_reset((void**)&p_scb->p_disc_db); }