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/******************************************************************************
*
* 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_ag_int.h"
#include "bta/bta_ag_api.h"
#include "bta/bta_sys.h"
#include "bta/bta_ag_api.h"
#include "bta/utl.h"
#include "stack/sdp_api.h"
#include "stack/btm_api.h"
#include "common/bt_trace.h"
#include "osi/allocator.h"
#if (BTA_AG_INCLUDED == TRUE)
/* 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 (4096+16)
#endif
/* declare sdp callback functions */
void bta_ag_sdp_cback_1(UINT16 status);
void bta_ag_sdp_cback_2(UINT16 status);
void bta_ag_sdp_cback_3(UINT16 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
};
/*******************************************************************************
**
** Function bta_ag_sdp_cback
**
** Description SDP callback function.
**
**
** Returns void
**
*******************************************************************************/
static void bta_ag_sdp_cback(UINT16 status, UINT8 idx)
{
tBTA_AG_DISC_RESULT *p_buf;
UINT16 event;
tBTA_AG_SCB *p_scb;
APPL_TRACE_DEBUG("bta_ag_sdp_cback status:0x%x", status);
if ((p_scb = bta_ag_scb_by_idx(idx)) != NULL) {
/* 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;
}
if ((p_buf = (tBTA_AG_DISC_RESULT *) osi_malloc(sizeof(tBTA_AG_DISC_RESULT))) != NULL) {
p_buf->hdr.event = event;
p_buf->hdr.layer_specific = idx;
p_buf->status = status;
bta_sys_sendmsg(p_buf);
}
}
}
/*******************************************************************************
**
** Function bta_ag_sdp_cback_1 to 3
**
** 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 status) {bta_ag_sdp_cback(status, 1);}
void bta_ag_sdp_cback_2(UINT16 status) {bta_ag_sdp_cback(status, 2);}
void bta_ag_sdp_cback_3(UINT16 status) {bta_ag_sdp_cback(status, 3);}
/******************************************************************************
**
** 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.
**
******************************************************************************/
BOOLEAN bta_ag_add_record(UINT16 service_uuid, char *p_service_name, UINT8 scn,
tBTA_AG_FEAT features, UINT32 sdp_handle)
{
tSDP_PROTOCOL_ELEM proto_elem_list[BTA_AG_NUM_PROTO_ELEMS];
UINT16 svc_class_id_list[BTA_AG_NUM_SVC_ELEMS];
UINT16 browse_list[] = {UUID_SERVCLASS_PUBLIC_BROWSE_GROUP};
UINT16 version;
UINT16 profile_uuid;
UINT8 network;
BOOLEAN result = TRUE;
BOOLEAN codec_supported = FALSE;
UINT8 buf[2];
APPL_TRACE_DEBUG("bta_ag_add_record uuid: %x", service_uuid);
memset( proto_elem_list, 0 , BTA_AG_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_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 = HFP_VERSION_1_8;
} 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 != 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 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, tBTA_AG_DATA *p_data)
{
tBTA_SERVICE_MASK services;
services = p_scb->reg_services >> BTA_HSP_SERVICE_ID;
for (int 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], p_data->api_register.p_name[i],
bta_ag_cb.profile[i].scn, p_data->api_register.features,
bta_ag_cb.profile[i].sdp_handle);
bta_sys_add_uuid(bta_ag_uuid[i]);
}
}
}
p_scb->hsp_version = HSP_VERSION_1_2;
}
/*******************************************************************************
**
** 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_DATA *p_data)
{
tBTA_AG_SCB *p = &bta_ag_cb.scb[0];
tBTA_SERVICE_MASK services;
tBTA_SERVICE_MASK others = 0;
int i;
UNUSED(p_data);
/* get services of all other registered servers */
for (i = 0; i < BTA_AG_NUM_IDX; i++) {
if (p_scb == p) {
continue;
}
if (p->in_use && p->dealloc == FALSE) {
others |= p->reg_services;
}
if (i < BTA_AG_NUM_SCB) {
p++;
}
}
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.
**
*******************************************************************************/
BOOLEAN bta_ag_sdp_find_attr(tBTA_AG_SCB *p_scb, tBTA_SERVICE_MASK service)
{
tSDP_DISC_REC *p_rec = NULL;
tSDP_DISC_ATTR *p_attr;
tSDP_PROTOCOL_ELEM pe;
UINT16 uuid;
BOOLEAN result = FALSE;
if (service & BTA_HFP_SERVICE_MASK) {
uuid = UUID_SERVCLASS_HF_HANDSFREE;
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 = 0x0100; /* Default version */
} else {
return result;
}
/* loop through all records we found */
while (TRUE)
{
/* get next record; if none found, we're done */
if ((p_rec = SDP_FindServiceInDb(p_scb->p_disc_db, uuid, p_rec)) == NULL) {
if (uuid == UUID_SERVCLASS_HEADSET_HS) {
/* Search again in case the peer device is HSP v1.0 */
uuid = UUID_SERVCLASS_HEADSET;
if ((p_rec = SDP_FindServiceInDb(p_scb->p_disc_db, uuid, p_rec)) == NULL) {
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) pe.params[0];
} else {
continue;
}
}
/* get profile version (if failure, version parameter is not updated) */
SDP_FindProfileVersionInRec(p_rec, uuid, &p_scb->peer_version);
/* get features if HFP */
if (service & BTA_HFP_SERVICE_MASK) {
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 (p_scb->peer_features == 0)
p_scb->peer_features = p_attr->attr_value.v.u16;
}
} else {
/* HSP */
if ((p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_REMOTE_AUDIO_VOLUME_CONTROL)) != NULL) {
/* 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)
{
tSDP_UUID uuid_list[2];
UINT16 num_uuid = 1;
UINT16 attr_list[4];
UINT8 num_attr;
BOOLEAN db_inited = FALSE;
/* 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].uu.uuid16 = UUID_SERVCLASS_HF_HANDSFREE;
} else if (service & BTA_HFP_SERVICE_MASK && p_scb->role == BTA_AG_ACP) {
/* HFP acceptor; get features */
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_HF_HANDSFREE;
} else if (service & BTA_HSP_SERVICE_MASK && p_scb->role == BTA_AG_INT) {
/* HSP initiator; get proto list */
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;
uuid_list[0].uu.uuid16 = UUID_SERVCLASS_HEADSET; /* Legacy from HSP v1.0 */
if (p_scb->hsp_version >= HSP_VERSION_1_2) {
uuid_list[1].uu.uuid16 = UUID_SERVCLASS_HEADSET_HS;
num_uuid = 2;
}
} else {
/* HSP acceptor; no discovery */
return;
}
/* allocate buffer for sdp database */
p_scb->p_disc_db = (tSDP_DISCOVERY_DB *) osi_malloc(BTA_AG_DISC_BUF_SIZE);
if(p_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(p_scb->p_disc_db, BTA_AG_DISC_BUF_SIZE, num_uuid,
uuid_list, num_attr, attr_list);
}
if(db_inited) {
/*Service discovery not initiated */
db_inited = SDP_ServiceSearchAttributeRequest(p_scb->peer_addr, p_scb->p_disc_db,
bta_ag_sdp_cback_tbl[bta_ag_scb_to_idx(p_scb) - 1]);
}
if(!db_inited) {
/*free discover db */
bta_ag_free_db(p_scb, NULL);
/* sent failed event */
bta_ag_sm_execute(p_scb, BTA_AG_DISC_FAIL_EVT, NULL);
}
}
/*******************************************************************************
**
** Function bta_ag_free_db
**
** Description Free discovery database.
**
**
** Returns void
**
*******************************************************************************/
void bta_ag_free_db(tBTA_AG_SCB *p_scb, tBTA_AG_DATA *p_data)
{
UNUSED(p_data);
if (p_scb->p_disc_db != NULL) {
osi_free(p_scb->p_disc_db);
p_scb->p_disc_db = NULL;
}
}
#endif /* #if (BTA_AG_INCLUDED == TRUE) */
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