/******************************************************************************
*
* Copyright 2014 The Android Open Source Project
* 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 <string.h>
#include <base/logging.h>
#include "bt_utils.h"
#include "bta_api.h"
#include "bta_hf_client_api.h"
#include "bta_hf_client_int.h"
#include "bta_sys.h"
#include "osi/include/osi.h"
using bluetooth::Uuid;
/* Number of protocol elements in protocol element list. */
#define BTA_HF_CLIENT_NUM_PROTO_ELEMS 2
/* Number of elements in service class id list. */
#define BTA_HF_CLIENT_NUM_SVC_ELEMS 2
/*******************************************************************************
*
* Function bta_hf_client_sdp_cback
*
* Description SDP callback function.
*
*
* Returns void
*
******************************************************************************/
static void bta_hf_client_sdp_cback(uint16_t status, void* data) {
uint16_t event;
tBTA_HF_CLIENT_DISC_RESULT* p_buf = (tBTA_HF_CLIENT_DISC_RESULT*)osi_malloc(
sizeof(tBTA_HF_CLIENT_DISC_RESULT));
APPL_TRACE_DEBUG("bta_hf_client_sdp_cback status:0x%x", status);
tBTA_HF_CLIENT_CB* client_cb = (tBTA_HF_CLIENT_CB*)data;
/* set event according to int/acp */
if (client_cb->role == BTA_HF_CLIENT_ACP)
event = BTA_HF_CLIENT_DISC_ACP_RES_EVT;
else
event = BTA_HF_CLIENT_DISC_INT_RES_EVT;
p_buf->hdr.event = event;
p_buf->hdr.layer_specific = client_cb->handle;
p_buf->status = status;
bta_sys_sendmsg(p_buf);
}
/******************************************************************************
*
* Function bta_hf_client_add_record
*
* Description This function is called by a server application to add
* HFP Client 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_hf_client_add_record(const char* p_service_name, uint8_t scn,
tBTA_HF_CLIENT_FEAT features,
uint32_t sdp_handle) {
tSDP_PROTOCOL_ELEM proto_elem_list[BTA_HF_CLIENT_NUM_PROTO_ELEMS];
uint16_t svc_class_id_list[BTA_HF_CLIENT_NUM_SVC_ELEMS];
uint16_t browse_list[] = {UUID_SERVCLASS_PUBLIC_BROWSE_GROUP};
uint16_t version;
uint16_t profile_uuid;
bool result = true;
uint8_t buf[2];
uint16_t sdp_features = 0;
APPL_TRACE_DEBUG("bta_hf_client_add_record");
memset(proto_elem_list, 0,
BTA_HF_CLIENT_NUM_PROTO_ELEMS * sizeof(tSDP_PROTOCOL_ELEM));
/* 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_HF_CLIENT_NUM_PROTO_ELEMS,
proto_elem_list);
/* add service class id list */
svc_class_id_list[0] = UUID_SERVCLASS_HF_HANDSFREE;
svc_class_id_list[1] = UUID_SERVCLASS_GENERIC_AUDIO;
result &= SDP_AddServiceClassIdList(sdp_handle, BTA_HF_CLIENT_NUM_SVC_ELEMS,
svc_class_id_list);
/* add profile descriptor list */
profile_uuid = UUID_SERVCLASS_HF_HANDSFREE;
version = HFP_VERSION_1_6;
result &= SDP_AddProfileDescriptorList(sdp_handle, profile_uuid, version);
/* add service name */
if (p_service_name != NULL && 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 */
if (features & BTA_HF_CLIENT_FEAT_ECNR)
sdp_features |= BTA_HF_CLIENT_FEAT_ECNR;
if (features & BTA_HF_CLIENT_FEAT_3WAY)
sdp_features |= BTA_HF_CLIENT_FEAT_3WAY;
if (features & BTA_HF_CLIENT_FEAT_CLI) sdp_features |= BTA_HF_CLIENT_FEAT_CLI;
if (features & BTA_HF_CLIENT_FEAT_VREC)
sdp_features |= BTA_HF_CLIENT_FEAT_VREC;
if (features & BTA_HF_CLIENT_FEAT_VOL) sdp_features |= BTA_HF_CLIENT_FEAT_VOL;
/* Codec bit position is different in SDP (bit 5) and in BRSF (bit 7) */
if (features & BTA_HF_CLIENT_FEAT_CODEC) sdp_features |= 0x0020;
UINT16_TO_BE_FIELD(buf, sdp_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_hf_client_create_record
*
* Description Create SDP record for registered service.
*
*
* Returns void
*
******************************************************************************/
void bta_hf_client_create_record(tBTA_HF_CLIENT_CB_ARR* client_cb_arr,
const char* p_service_name) {
/* add sdp record if not already registered */
if (client_cb_arr->sdp_handle == 0) {
client_cb_arr->sdp_handle = SDP_CreateRecord();
client_cb_arr->scn = BTM_AllocateSCN();
bta_hf_client_add_record(p_service_name, client_cb_arr->scn,
client_cb_arr->features,
client_cb_arr->sdp_handle);
bta_sys_add_uuid(UUID_SERVCLASS_HF_HANDSFREE);
}
}
/*******************************************************************************
*
* Function bta_hf_client_del_record
*
* Description Delete SDP record for registered service.
*
*
* Returns void
*
******************************************************************************/
void bta_hf_client_del_record(tBTA_HF_CLIENT_CB_ARR* client_cb) {
APPL_TRACE_DEBUG("%s", __func__);
if (client_cb->sdp_handle != 0) {
SDP_DeleteRecord(client_cb->sdp_handle);
client_cb->sdp_handle = 0;
BTM_FreeSCN(client_cb->scn);
BTM_SecClrService(BTM_SEC_SERVICE_HF_HANDSFREE);
bta_sys_remove_uuid(UUID_SERVCLASS_HF_HANDSFREE);
}
}
/*******************************************************************************
*
* Function bta_hf_client_sdp_find_attr
*
* Description Process SDP discovery results to find requested attribute
*
*
* Returns true if results found, false otherwise.
*
******************************************************************************/
bool bta_hf_client_sdp_find_attr(tBTA_HF_CLIENT_CB* client_cb) {
tSDP_DISC_REC* p_rec = NULL;
tSDP_DISC_ATTR* p_attr;
tSDP_PROTOCOL_ELEM pe;
bool result = false;
client_cb->peer_version = HFP_VERSION_1_1; /* Default version */
/* loop through all records we found */
while (true) {
/* get next record; if none found, we're done */
p_rec = SDP_FindServiceInDb(client_cb->p_disc_db,
UUID_SERVCLASS_AG_HANDSFREE, p_rec);
if (p_rec == NULL) {
break;
}
/* get scn from proto desc list if initiator */
if (client_cb->role == BTA_HF_CLIENT_INT) {
if (SDP_FindProtocolListElemInRec(p_rec, UUID_PROTOCOL_RFCOMM, &pe)) {
client_cb->peer_scn = (uint8_t)pe.params[0];
} else {
continue;
}
}
/* get profile version (if failure, version parameter is not updated) */
SDP_FindProfileVersionInRec(p_rec, UUID_SERVCLASS_HF_HANDSFREE,
&client_cb->peer_version);
/* get features */
p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_SUPPORTED_FEATURES);
if (p_attr != NULL) {
/* Found attribute. Get value. */
/* There might be race condition between SDP and BRSF. */
/* Do not update if we already received BRSF. */
if (client_cb->peer_features == 0) {
client_cb->peer_features = p_attr->attr_value.v.u16;
/* SDP and BRSF WBS bit are different, correct it if set */
if (client_cb->peer_features & 0x0020) {
client_cb->peer_features &= ~0x0020;
client_cb->peer_features |= BTA_HF_CLIENT_PEER_CODEC;
}
/* get network for ability to reject calls */
p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_NETWORK);
if (p_attr != NULL) {
if (p_attr->attr_value.v.u16 == 0x01) {
client_cb->peer_features |= BTA_HF_CLIENT_PEER_REJECT;
}
}
}
}
/* found what we needed */
result = true;
break;
}
APPL_TRACE_DEBUG("%s: peer_version=0x%x peer_features=0x%x", __func__,
client_cb->peer_version, client_cb->peer_features);
return result;
}
/*******************************************************************************
*
* Function bta_hf_client_do_disc
*
* Description Do service discovery.
*
*
* Returns void
*
******************************************************************************/
void bta_hf_client_do_disc(tBTA_HF_CLIENT_CB* client_cb) {
Uuid uuid_list[1];
uint16_t num_uuid = 1;
uint16_t attr_list[4];
uint8_t num_attr;
bool db_inited = false;
/* initiator; get proto list and features */
if (client_cb->role == BTA_HF_CLIENT_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_AG_HANDSFREE);
}
/* acceptor; get features */
else {
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_AG_HANDSFREE);
}
/* allocate buffer for sdp database */
client_cb->p_disc_db = (tSDP_DISCOVERY_DB*)osi_malloc(BT_DEFAULT_BUFFER_SIZE);
/* set up service discovery database; attr happens to be attr_list len */
db_inited = SDP_InitDiscoveryDb(client_cb->p_disc_db, BT_DEFAULT_BUFFER_SIZE,
num_uuid, uuid_list, num_attr, attr_list);
if (db_inited) {
/*Service discovery not initiated */
db_inited = SDP_ServiceSearchAttributeRequest2(
client_cb->peer_addr, client_cb->p_disc_db, bta_hf_client_sdp_cback,
(void*)client_cb);
}
if (!db_inited) {
/*free discover db */
osi_free_and_reset((void**)&client_cb->p_disc_db);
/* sent failed event */
tBTA_HF_CLIENT_DATA msg;
msg.hdr.layer_specific = client_cb->handle;
bta_hf_client_sm_execute(BTA_HF_CLIENT_DISC_FAIL_EVT, &msg);
}
}
/*******************************************************************************
*
* Function bta_hf_client_free_db
*
* Description Free discovery database.
*
*
* Returns void
*
******************************************************************************/
void bta_hf_client_free_db(tBTA_HF_CLIENT_DATA* p_data) {
CHECK(p_data != NULL);
tBTA_HF_CLIENT_CB* client_cb =
bta_hf_client_find_cb_by_handle(p_data->hdr.layer_specific);
if (client_cb == NULL) {
APPL_TRACE_ERROR("%s: cb not found for handle %d", __func__,
p_data->hdr.layer_specific);
return;
}
osi_free_and_reset((void**)&client_cb->p_disc_db);
}