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components/bt/host/bluedroid/bta/hf_client/bta_hf_client_sdp.c
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/******************************************************************************
*
* Copyright (c) 2014 The Android Open Source Project
* Copyright (C) 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 "bta/bta_api.h"
#include "bta/bta_sys.h"
#include "common/bt_defs.h"
#include "bta/bta_hf_client_api.h"
#include "bta_hf_client_int.h"
#include "osi/allocator.h"
#if (BTA_HF_INCLUDED == TRUE)
/* 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 status)
{
tBTA_HF_CLIENT_DISC_RESULT *p_buf;
UINT16 event;
APPL_TRACE_DEBUG("bta_hf_client_sdp_cback status:0x%x", status);
/* set event according to int/acp */
if (bta_hf_client_cb.scb.role == BTA_HF_CLIENT_ACP) {
event = BTA_HF_CLIENT_DISC_ACP_RES_EVT;
} else {
event = BTA_HF_CLIENT_DISC_INT_RES_EVT;
}
if ((p_buf = (tBTA_HF_CLIENT_DISC_RESULT *) osi_malloc(sizeof(tBTA_HF_CLIENT_DISC_RESULT))) != NULL) {
p_buf->hdr.event = event;
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.
**
******************************************************************************/
BOOLEAN bta_hf_client_add_record(char *p_service_name, UINT8 scn,
tBTA_HF_CLIENT_FEAT features, UINT32 sdp_handle)
{
tSDP_PROTOCOL_ELEM proto_elem_list[BTA_HF_CLIENT_NUM_PROTO_ELEMS];
UINT16 svc_class_id_list[BTA_HF_CLIENT_NUM_SVC_ELEMS];
UINT16 browse_list[] = {UUID_SERVCLASS_PUBLIC_BROWSE_GROUP};
UINT16 version;
UINT16 profile_uuid;
BOOLEAN result = TRUE;
UINT8 buf[2];
UINT16 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_8;
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)(strlen(p_service_name) + 1), (UINT8 *) 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_DATA *p_data)
{
/* add sdp record if not already registered */
if (bta_hf_client_cb.sdp_handle == 0) {
bta_hf_client_cb.sdp_handle = SDP_CreateRecord();
bta_hf_client_cb.scn = BTM_AllocateSCN();
bta_hf_client_add_record(p_data->api_register.name,
bta_hf_client_cb.scn,
p_data->api_register.features,
bta_hf_client_cb.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_DATA *p_data)
{
UNUSED(p_data);
APPL_TRACE_DEBUG("bta_hf_client_del_record");
if (bta_hf_client_cb.sdp_handle != 0) {
SDP_DeleteRecord(bta_hf_client_cb.sdp_handle);
bta_hf_client_cb.sdp_handle = 0;
BTM_FreeSCN(bta_hf_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.
**
*******************************************************************************/
BOOLEAN bta_hf_client_sdp_find_attr(void)
{
tSDP_DISC_REC *p_rec = NULL;
tSDP_DISC_ATTR *p_attr;
tSDP_PROTOCOL_ELEM pe;
BOOLEAN result = FALSE;
bta_hf_client_cb.scb.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 */
if ((p_rec = SDP_FindServiceInDb(bta_hf_client_cb.scb.p_disc_db, UUID_SERVCLASS_AG_HANDSFREE, p_rec)) == NULL) {
break;
}
/* get scn from proto desc list if initiator */
if (bta_hf_client_cb.scb.role == BTA_HF_CLIENT_INT) {
if (SDP_FindProtocolListElemInRec(p_rec, UUID_PROTOCOL_RFCOMM, &pe)) {
bta_hf_client_cb.scb.peer_scn = (UINT8) pe.params[0];
} else {
continue;
}
}
/* get profile version (if failure, version parameter is not updated) */
SDP_FindProfileVersionInRec(p_rec, UUID_SERVCLASS_HF_HANDSFREE, &bta_hf_client_cb.scb.peer_version);
/* get features */
if ((p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_SUPPORTED_FEATURES)) != NULL) {
/* Found attribute. Get value. */
/* There might be race condition between SDP and BRSF. */
/* Do not update if we already received BRSF. */
if (bta_hf_client_cb.scb.peer_features == 0) {
bta_hf_client_cb.scb.peer_features = p_attr->attr_value.v.u16;
/* SDP and BRSF WBS bit are different, correct it if set */
if (bta_hf_client_cb.scb.peer_features & 0x0020) {
bta_hf_client_cb.scb.peer_features &= ~0x0020;
bta_hf_client_cb.scb.peer_features |= BTA_HF_CLIENT_PEER_CODEC;
}
/* get network for ability to reject calls */
if ((p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_NETWORK)) != NULL) {
if (p_attr->attr_value.v.u16 == 0x01) {
bta_hf_client_cb.scb.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",
__FUNCTION__, bta_hf_client_cb.scb.peer_version,
bta_hf_client_cb.scb.peer_features);
return result;
}
/*******************************************************************************
**
** Function bta_hf_client_do_disc
**
** Description Do service discovery.
**
**
** Returns void
**
*******************************************************************************/
void bta_hf_client_do_disc(void)
{
tSDP_UUID uuid_list[2];
UINT16 num_uuid = 1;
UINT16 attr_list[4];
UINT8 num_attr;
BOOLEAN db_inited = FALSE;
/* initiator; get proto list and features */
if (bta_hf_client_cb.scb.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].uu.uuid16 = 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].uu.uuid16 = UUID_SERVCLASS_AG_HANDSFREE;
}
/* allocate buffer for sdp database */
bta_hf_client_cb.scb.p_disc_db = (tSDP_DISCOVERY_DB *) osi_malloc(BT_DEFAULT_BUFFER_SIZE);
if (bta_hf_client_cb.scb.p_disc_db) {
/* set up service discovery database; attr happens to be attr_list len */
uuid_list[0].len = LEN_UUID_16;
uuid_list[1].len = LEN_UUID_16;
db_inited = SDP_InitDiscoveryDb(bta_hf_client_cb.scb.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_ServiceSearchAttributeRequest(bta_hf_client_cb.scb.peer_addr,
bta_hf_client_cb.scb.p_disc_db, bta_hf_client_sdp_cback);
}
if (!db_inited) {
/*free discover db */
bta_hf_client_free_db(NULL);
/* sent failed event */
bta_hf_client_sm_execute(BTA_HF_CLIENT_DISC_FAIL_EVT, NULL);
}
}
/*******************************************************************************
**
** Function bta_hf_client_free_db
**
** Description Free discovery database.
**
**
** Returns void
**
*******************************************************************************/
void bta_hf_client_free_db(tBTA_HF_CLIENT_DATA *p_data)
{
UNUSED(p_data);
if (bta_hf_client_cb.scb.p_disc_db != NULL) {
osi_free(bta_hf_client_cb.scb.p_disc_db);
bta_hf_client_cb.scb.p_disc_db = NULL;
}
}
#endif /* #if (BTA_HF_INCLUDED == TRUE) */
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