btif/src/btif_sdp_server.c

/******************************************************************************
 *
 * Copyright (C) 2014 Samsung System LSI
 *
 *  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.
 *
 ******************************************************************************/

/************************************************************************************
 *
 *  Filename:      btif_sdp_server.c
 *  Description:   SDP server Bluetooth Interface to create and remove SDP records.
 *                 To be used in combination with the RFCOMM/L2CAP(LE) sockets.
 *
 *
 ***********************************************************************************/

#include <hardware/bluetooth.h>
#include <hardware/bt_sdp.h>
#include <stdlib.h>
#include <string.h>
#include <pthread.h>

#define LOG_TAG "BTIF_SDP_SERVER"
#include "btif_common.h"
#include "btif_util.h"
#include "bta_sdp_api.h"
#include "bta_sys.h"
#include "utl.h"
#include "btif_sock_util.h"

static pthread_mutex_t sdp_lock = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;

/**
 * The need for a state variable have been reduced to two states.
 * The remaining state control is handled by program flow
 */
typedef enum {
    SDP_RECORD_FREE = 0,
    SDP_RECORD_ALLOCED,
} sdp_state_t;

typedef struct {
  sdp_state_t state;
  int sdp_handle;
  bluetooth_sdp_record* record_data;
} sdp_slot_t;

#define MAX_SDP_SLOTS 128
static sdp_slot_t sdp_slots[MAX_SDP_SLOTS];

/*****************************************************************************
 * LOCAL Functions
 *****************************************************************************/
static int add_maps_sdp(const bluetooth_sdp_mas_record* rec);
static int add_mapc_sdp(const bluetooth_sdp_mns_record* rec);
static int add_pbaps_sdp(const bluetooth_sdp_pse_record* rec);
static int add_opps_sdp(const bluetooth_sdp_ops_record* rec);
static int add_saps_sdp(const bluetooth_sdp_sap_record* rec);
bt_status_t remove_sdp_record(int record_id);
static int free_sdp_slot(int id);

/******************************************************************************
 * WARNING: Functions below are not called in BTU context.
 * Introduced to make it possible to create SDP records from JAVA with both a
 * RFCOMM channel and a L2CAP PSM.
 * Overall architecture:
 *  1) JAVA calls createRecord() which returns a pseudo ID which at a later
 *     point will be linked to a specific SDP handle.
 *  2) createRecord() requests the BTU task(thread) to call a callback in SDP
 *     which creates the actual record, and updates the ID<->SDPHandle map
 *     based on the ID beeing passed to BTA as user_data.
 *****************************************************************************/

static void init_sdp_slots()
{
    int i;
    memset(sdp_slots, 0, sizeof(sdp_slot_t)*MAX_SDP_SLOTS);
    /* if SDP_RECORD_FREE is zero - no need to set the value */
    if(SDP_RECORD_FREE != 0) {
        for(i = 0; i < MAX_SDP_SLOTS; i++)
        {
            sdp_slots[i].state = SDP_RECORD_FREE;
        }
    }
}

bt_status_t sdp_server_init()
{
    BTIF_TRACE_DEBUG("Sdp Server %s", __FUNCTION__);
    init_sdp_slots();
    return BT_STATUS_SUCCESS;
}

void sdp_server_cleanup()
{
    BTIF_TRACE_DEBUG("Sdp Server %s", __FUNCTION__);
    pthread_mutex_lock(&sdp_lock);
    int i;
    for(i = 0; i < MAX_SDP_SLOTS; i++)
    {
         /*remove_sdp_record(i); we cannot send messages to the other threads, since they might
         *                       have been shut down already. Just do local cleanup.
         */
        free_sdp_slot(i);
    }
    pthread_mutex_unlock(&sdp_lock);
}

int get_sdp_records_size(bluetooth_sdp_record* in_record, int count) {
    bluetooth_sdp_record* record = in_record;
    int records_size = 0;
    int i;
    for(i=0; i<count; i++) {
        record = &in_record[i];
        records_size += sizeof(bluetooth_sdp_record);
        records_size += record->hdr.service_name_length;
        if(record->hdr.service_name_length > 0){
            records_size++; /* + '\0' termination of string */
        }
        records_size += record->hdr.user1_ptr_len;
        records_size += record->hdr.user2_ptr_len;
    }
    return records_size;
}

/* Deep copy all content of in_records into out_records.
 * out_records must point to a chunk of memory large enough to contain all
 * the data. Use getSdpRecordsSize() to calculate the needed size. */
void copy_sdp_records(bluetooth_sdp_record* in_records,
        bluetooth_sdp_record* out_records, int count) {
    int i;
    bluetooth_sdp_record* in_record;
    bluetooth_sdp_record* out_record;
    char* free_ptr = (char*)(&out_records[count]); /* set pointer to after the last entry */

    for(i=0; i<count; i++) {
        in_record = &in_records[i];
        out_record = &out_records[i];
        *out_record = *in_record;

        if(in_record->hdr.service_name == NULL || in_record->hdr.service_name_length == 0) {
            out_record->hdr.service_name = NULL;
            out_record->hdr.service_name_length = 0;
        } else {
            out_record->hdr.service_name = free_ptr; // Update service_name pointer
            // Copy string
            memcpy(free_ptr, in_record->hdr.service_name, in_record->hdr.service_name_length);
            free_ptr += in_record->hdr.service_name_length;
            *(free_ptr) = '\0'; // Set '\0' termination of string
            free_ptr++;
        }
        if(in_record->hdr.user1_ptr != NULL) {
            out_record->hdr.user1_ptr = (UINT8*)free_ptr; // Update pointer
            memcpy(free_ptr, in_record->hdr.user1_ptr, in_record->hdr.user1_ptr_len); // Copy content
            free_ptr += in_record->hdr.user1_ptr_len;
        }
        if(in_record->hdr.user2_ptr != NULL) {
            out_record->hdr.user2_ptr = (UINT8*)free_ptr; // Update pointer
            memcpy(free_ptr, in_record->hdr.user2_ptr, in_record->hdr.user2_ptr_len); // Copy content
            free_ptr += in_record->hdr.user2_ptr_len;
        }
    }
    return;
}

/* Reserve a slot in sdp_slots, copy data and set a reference to the copy.
 * The record_data will contain both the record and any data pointed to by
 * the record.
 * Currently this covers:
 *   service_name string,
 *   user1_ptr and
 *   user2_ptr. */
static int alloc_sdp_slot(bluetooth_sdp_record* in_record) {
    int i;
    char* tmp_ptr = NULL;
    int record_size = get_sdp_records_size(in_record, 1);
    bluetooth_sdp_record* record = malloc(record_size);

    copy_sdp_records(in_record, record, 1);

    /* We are optimists here, and preallocate the record.
     * This is to reduce the time we hold the sdp_lock. */
    pthread_mutex_lock(&sdp_lock);
    for(i = 0; i < MAX_SDP_SLOTS; i++)
    {
        if(sdp_slots[i].state == SDP_RECORD_FREE) {
            sdp_slots[i].state = SDP_RECORD_ALLOCED;
            sdp_slots[i].record_data = record;
            break;
        }
    }
    pthread_mutex_unlock(&sdp_lock);
    if(i >= MAX_SDP_SLOTS) {
        APPL_TRACE_ERROR("%s() failed - no more free slots!", __func__);
        /* Rearly the optimist is too optimistic, and cleanup is needed...*/
        free(record);
        return -1;
    }
    return i;
}

static int free_sdp_slot(int id) {
    int handle = -1;
    bluetooth_sdp_record* record = NULL;
    if(id >= MAX_SDP_SLOTS) {
        APPL_TRACE_ERROR("%s() failed - id %d is invalid", __func__, id);
        return handle;
    }
    pthread_mutex_lock(&sdp_lock);
    handle = sdp_slots[id].sdp_handle;
    sdp_slots[id].sdp_handle = 0;
    if(sdp_slots[id].state != SDP_RECORD_FREE)
    {
        /* safe a copy of the pointer, and free after unlock() */
        record = sdp_slots[id].record_data;
    }
    sdp_slots[id].state = SDP_RECORD_FREE;
    pthread_mutex_unlock(&sdp_lock);

    if(record != NULL) {
        free(record);
    } else {
        // Record have already been freed
        handle = -1;
    }
    return handle;
}

/***
 * Use this to get a reference to a SDP slot AND change the state to
 * SDP_RECORD_CREATE_INITIATED.
 */
static const sdp_slot_t* start_create_sdp(int id) {
    sdp_slot_t* sdp_slot;
    if(id >= MAX_SDP_SLOTS) {
        APPL_TRACE_ERROR("%s() failed - id %d is invalid", __func__, id);
        return NULL;
    }
    pthread_mutex_lock(&sdp_lock);
    if(sdp_slots[id].state == SDP_RECORD_ALLOCED) {
        sdp_slot = &(sdp_slots[id]);
    } else {
        /* The record have been removed before this event occurred - e.g. deinit */
        sdp_slot = NULL;
    }
    pthread_mutex_unlock(&sdp_lock);
    if(sdp_slot == NULL) {
        APPL_TRACE_ERROR("%s() failed - state for id %d is "
                "sdp_slots[id].state = %d expected %d", __func__,
                id, sdp_slots[id].state, SDP_RECORD_ALLOCED);
    }
    return sdp_slot;
}

static void set_sdp_handle(int id, int handle) {
    pthread_mutex_lock(&sdp_lock);
    sdp_slots[id].sdp_handle = handle;
    pthread_mutex_unlock(&sdp_lock);
    BTIF_TRACE_DEBUG("%s() id=%d to handle=0x%08x", __FUNCTION__, id, handle);
}


bt_status_t create_sdp_record(bluetooth_sdp_record *record, int* record_handle) {
    int handle;

    handle = alloc_sdp_slot(record);
    BTIF_TRACE_DEBUG("%s() handle = 0x%08x", __FUNCTION__, handle);

    if(handle < 0)
        return BT_STATUS_FAIL;

    BTA_SdpCreateRecordByUser((void*) handle);

    *record_handle = handle;

    return BT_STATUS_SUCCESS;
}

bt_status_t remove_sdp_record(int record_id) {
    int handle;

    /* Get the Record handle, and free the slot */
    handle = free_sdp_slot(record_id);
    BTIF_TRACE_DEBUG("Sdp Server %s id=%d to handle=0x%08x",
            __FUNCTION__, record_id, handle);

    /* Pass the actual record handle */
    if(handle > 0) {
        BTA_SdpRemoveRecordByUser((void*) handle);
        return BT_STATUS_SUCCESS;
    }
    BTIF_TRACE_DEBUG("Sdp Server %s - record already removed - or never created", __FUNCTION__);
    return BT_STATUS_FAIL;
}


/******************************************************************************
 * CALLBACK FUNCTIONS
 * Called in BTA context to create/remove SDP records.
 ******************************************************************************/

void on_create_record_event(int id) {
    /*
     * 1) Fetch the record pointer, and change its state?
     * 2) switch on the type to create the correct record
     * 3) Update state on completion
     * 4) What to do at fail?
     * */
    BTIF_TRACE_DEBUG("Sdp Server %s", __FUNCTION__);
    const sdp_slot_t* sdp_slot = start_create_sdp(id);
    /* In the case we are shutting down, sdp_slot is NULL */
    if(sdp_slot != NULL) {
        bluetooth_sdp_record* record = sdp_slot->record_data;
        int handle = -1;
        switch(record->hdr.type) {
        case SDP_TYPE_MAP_MAS:
            handle = add_maps_sdp(&record->mas);
            break;
        case SDP_TYPE_MAP_MNS:
            handle = add_mapc_sdp(&record->mns);
            break;
        case SDP_TYPE_PBAP_PSE:
            handle = add_pbaps_sdp(&record->pse);
            break;
        case SDP_TYPE_OPP_SERVER:
            handle = add_opps_sdp(&record->ops);
            break;
        case SDP_TYPE_SAP_SERVER:
            handle = add_saps_sdp(&record->sap);
            break;
        case SDP_TYPE_PBAP_PCE:
    //        break; not yet supported
        default:
            BTIF_TRACE_DEBUG("Record type %d is not supported",record->hdr.type);
            break;
        }
        if(handle != -1) {
            set_sdp_handle(id, handle);
        }
    }
}

void on_remove_record_event(int handle) {
    BTIF_TRACE_DEBUG("Sdp Server %s", __FUNCTION__);

    // User data carries the actual SDP handle, not the ID.
    if(handle != -1 && handle != 0) {
        BOOLEAN result;
        result = SDP_DeleteRecord( handle );
        if(result == FALSE) {
            BTIF_TRACE_ERROR("  Unable to remove handle 0x%08x", handle);
        }
    }
}

/****
 * Below the actual functions accessing BTA context data - hence only call from BTA context!
 */

/* Create a MAP MAS SDP record based on information stored in a bluetooth_sdp_mas_record */
static int add_maps_sdp(const bluetooth_sdp_mas_record* rec)
{

    tSDP_PROTOCOL_ELEM  protoList [3];
    UINT16              service = UUID_SERVCLASS_MESSAGE_ACCESS;
    UINT16              browse = UUID_SERVCLASS_PUBLIC_BROWSE_GROUP;
    BOOLEAN             status = TRUE;
    UINT32              sdp_handle = 0;
    UINT8               temp[4];
    UINT8*              p_temp = temp;

    APPL_TRACE_DEBUG("%s(): MASID = 0x%02x, scn 0x%02x, psm = 0x%04x\n  service name %s", __func__,
            rec->mas_instance_id, rec->hdr.rfcomm_channel_number,
            rec->hdr.l2cap_psm, rec->hdr.service_name);

    APPL_TRACE_DEBUG("  msg_types: 0x%02x, feature_bits: 0x%08x",
            rec->supported_message_types, rec->supported_features);

    if ((sdp_handle = SDP_CreateRecord()) == 0)
    {
        APPL_TRACE_ERROR("%s() - Unable to register MAPS Service", __func__);
        return sdp_handle;
    }

    /* add service class */
    status &= SDP_AddServiceClassIdList(sdp_handle, 1, &service);
    memset( protoList, 0 , 3*sizeof(tSDP_PROTOCOL_ELEM) );

    /* add protocol list, including RFCOMM scn */
    protoList[0].protocol_uuid = UUID_PROTOCOL_L2CAP;
    protoList[0].num_params = 0;
    protoList[1].protocol_uuid = UUID_PROTOCOL_RFCOMM;
    protoList[1].num_params = 1;
    protoList[1].params[0] = rec->hdr.rfcomm_channel_number;
    protoList[2].protocol_uuid = UUID_PROTOCOL_OBEX;
    protoList[2].num_params = 0;
    status &= SDP_AddProtocolList(sdp_handle, 3, protoList);

    /* Add a name entry */
    status &= SDP_AddAttribute(sdp_handle,
                    (UINT16)ATTR_ID_SERVICE_NAME,
                    (UINT8)TEXT_STR_DESC_TYPE,
                    (UINT32)(rec->hdr.service_name_length + 1),
                    (UINT8 *)rec->hdr.service_name);

    /* Add in the Bluetooth Profile Descriptor List */
    status &= SDP_AddProfileDescriptorList(sdp_handle,
                                     UUID_SERVCLASS_MAP_PROFILE,
                                     rec->hdr.profile_version);

    /* Add MAS instance ID */
    status &= SDP_AddAttribute(sdp_handle, ATTR_ID_MAS_INSTANCE_ID, UINT_DESC_TYPE,
              (UINT32)1, (UINT8*)&rec->mas_instance_id);

    /* Add supported message types */
    status &= SDP_AddAttribute(sdp_handle, ATTR_ID_SUPPORTED_MSG_TYPE, UINT_DESC_TYPE,
              (UINT32)1, (UINT8*)&rec->supported_message_types);

    /* Add supported feature */
    UINT32_TO_BE_STREAM(p_temp, rec->supported_features);
    status &= SDP_AddAttribute(sdp_handle, ATTR_ID_MAP_SUPPORTED_FEATURES,
            UINT_DESC_TYPE, (UINT32)4, temp);

    /* Add the L2CAP PSM if present */
    if(rec->hdr.l2cap_psm != -1) {
        p_temp = temp;// The macro modifies p_temp, hence rewind.
        UINT16_TO_BE_STREAM(p_temp, rec->hdr.l2cap_psm);
        status &= SDP_AddAttribute(sdp_handle, ATTR_ID_GOEP_L2CAP_PSM,
                UINT_DESC_TYPE, (UINT32)2, temp);
    }

    /* Make the service browseable */
    status &= SDP_AddUuidSequence (sdp_handle, ATTR_ID_BROWSE_GROUP_LIST, 1, &browse);

    if (!status)
    {
        SDP_DeleteRecord(sdp_handle);
        sdp_handle = 0;
        APPL_TRACE_ERROR("%s() FAILED", __func__);
    }
    else
    {
        bta_sys_add_uuid(service);  /* UUID_SERVCLASS_MESSAGE_ACCESS */
        APPL_TRACE_DEBUG("%s():  SDP Registered (handle 0x%08x)", __func__, sdp_handle);
    }
    return sdp_handle;
}

/* Create a MAP MNS SDP record based on information stored in a bluetooth_sdp_mns_record */
static int add_mapc_sdp(const bluetooth_sdp_mns_record* rec)
{

    tSDP_PROTOCOL_ELEM  protoList [3];
    UINT16              service = UUID_SERVCLASS_MESSAGE_NOTIFICATION;
    UINT16              browse = UUID_SERVCLASS_PUBLIC_BROWSE_GROUP;
    BOOLEAN             status = TRUE;
    UINT32              sdp_handle = 0;
    UINT8               temp[4];
    UINT8*              p_temp = temp;

    APPL_TRACE_DEBUG("%s(): scn 0x%02x, psm = 0x%04x\n  service name %s", __func__,
            rec->hdr.rfcomm_channel_number, rec->hdr.l2cap_psm, rec->hdr.service_name);

    APPL_TRACE_DEBUG("  feature_bits: 0x%08x", rec->supported_features);

    if ((sdp_handle = SDP_CreateRecord()) == 0)
    {
        APPL_TRACE_ERROR("%s(): Unable to register MAP Notification Service", __func__);
        return sdp_handle;
    }

    /* add service class */
    status &= SDP_AddServiceClassIdList(sdp_handle, 1, &service);
    memset( protoList, 0 , 3*sizeof(tSDP_PROTOCOL_ELEM) );

    /* add protocol list, including RFCOMM scn */
    protoList[0].protocol_uuid = UUID_PROTOCOL_L2CAP;
    protoList[0].num_params = 0;
    protoList[1].protocol_uuid = UUID_PROTOCOL_RFCOMM;
    protoList[1].num_params = 1;
    protoList[1].params[0] = rec->hdr.rfcomm_channel_number;
    protoList[2].protocol_uuid = UUID_PROTOCOL_OBEX;
    protoList[2].num_params = 0;
    status &= SDP_AddProtocolList(sdp_handle, 3, protoList);

    /* Add a name entry */
    status &= SDP_AddAttribute(sdp_handle,
                    (UINT16)ATTR_ID_SERVICE_NAME,
                    (UINT8)TEXT_STR_DESC_TYPE,
                    (UINT32)(rec->hdr.service_name_length + 1),
                    (UINT8 *)rec->hdr.service_name);

    /* Add in the Bluetooth Profile Descriptor List */
    status &= SDP_AddProfileDescriptorList(sdp_handle,
                                     UUID_SERVCLASS_MAP_PROFILE,
                                     rec->hdr.profile_version);

    /* Add supported feature */
    UINT32_TO_BE_STREAM(p_temp, rec->supported_features);
    status &= SDP_AddAttribute(sdp_handle, ATTR_ID_MAP_SUPPORTED_FEATURES,
            UINT_DESC_TYPE, (UINT32)4, temp);

    /* Add the L2CAP PSM if present */
    if(rec->hdr.l2cap_psm != -1) {
        p_temp = temp;// The macro modifies p_temp, hence rewind.
        UINT16_TO_BE_STREAM(p_temp, rec->hdr.l2cap_psm);
        status &= SDP_AddAttribute(sdp_handle, ATTR_ID_GOEP_L2CAP_PSM,
                UINT_DESC_TYPE, (UINT32)2, temp);
    }

    /* Make the service browseable */
    status &= SDP_AddUuidSequence (sdp_handle, ATTR_ID_BROWSE_GROUP_LIST, 1, &browse);

    if (!status)
    {
        SDP_DeleteRecord(sdp_handle);
        sdp_handle = 0;
        APPL_TRACE_ERROR("%s() FAILED", __func__);
    }
    else
    {
        bta_sys_add_uuid(service);  /* UUID_SERVCLASS_MESSAGE_ACCESS */
        APPL_TRACE_DEBUG("%s():  SDP Registered (handle 0x%08x)", __func__, sdp_handle);
    }
    return sdp_handle;
}

/* Create a PBAP Server SDP record based on information stored in a bluetooth_sdp_pse_record */
static int add_pbaps_sdp(const bluetooth_sdp_pse_record* rec)
{

    tSDP_PROTOCOL_ELEM  protoList [3];
    UINT16              service = UUID_SERVCLASS_PBAP_PSE;
    UINT16              browse = UUID_SERVCLASS_PUBLIC_BROWSE_GROUP;
    BOOLEAN             status = TRUE;
    UINT32              sdp_handle = 0;
    UINT8               temp[4];
    UINT8*              p_temp = temp;

    APPL_TRACE_DEBUG("%s(): scn 0x%02x, psm = 0x%04x\n  service name %s", __func__,
            rec->hdr.rfcomm_channel_number, rec->hdr.l2cap_psm, rec->hdr.service_name);

    APPL_TRACE_DEBUG("  supported_repositories: 0x%08x, feature_bits: 0x%08x",
            rec->supported_repositories, rec->supported_features);

    if ((sdp_handle = SDP_CreateRecord()) == 0)
    {
        APPL_TRACE_ERROR("%s(): Unable to register PBAP Server Service", __func__);
        return sdp_handle;
    }

    /* add service class */
    status &= SDP_AddServiceClassIdList(sdp_handle, 1, &service);
    memset( protoList, 0 , 3*sizeof(tSDP_PROTOCOL_ELEM) );

    /* add protocol list, including RFCOMM scn */
    protoList[0].protocol_uuid = UUID_PROTOCOL_L2CAP;
    protoList[0].num_params = 0;
    protoList[1].protocol_uuid = UUID_PROTOCOL_RFCOMM;
    protoList[1].num_params = 1;
    protoList[1].params[0] = rec->hdr.rfcomm_channel_number;
    protoList[2].protocol_uuid = UUID_PROTOCOL_OBEX;
    protoList[2].num_params = 0;
    status &= SDP_AddProtocolList(sdp_handle, 3, protoList);

    /* Add a name entry */
    status &= SDP_AddAttribute(sdp_handle,
                    (UINT16)ATTR_ID_SERVICE_NAME,
                    (UINT8)TEXT_STR_DESC_TYPE,
                    (UINT32)(rec->hdr.service_name_length + 1),
                    (UINT8 *)rec->hdr.service_name);

    /* Add in the Bluetooth Profile Descriptor List */
    status &= SDP_AddProfileDescriptorList(sdp_handle,
                                     UUID_SERVCLASS_PHONE_ACCESS,
                                     rec->hdr.profile_version);

    /* Add supported repositories 1 byte */
    status &= SDP_AddAttribute(sdp_handle, ATTR_ID_SUPPORTED_REPOSITORIES,
            UINT_DESC_TYPE, (UINT32)1, (UINT8*)&rec->supported_repositories);

    /* Add supported feature 4 bytes*/
    UINT32_TO_BE_STREAM(p_temp, rec->supported_features);
    status &= SDP_AddAttribute(sdp_handle, ATTR_ID_PBAP_SUPPORTED_FEATURES,
            UINT_DESC_TYPE, (UINT32)4, temp);

    /* Add the L2CAP PSM if present */
    if(rec->hdr.l2cap_psm != -1) {
        p_temp = temp;// The macro modifies p_temp, hence rewind.
        UINT16_TO_BE_STREAM(p_temp, rec->hdr.l2cap_psm);
        status &= SDP_AddAttribute(sdp_handle, ATTR_ID_GOEP_L2CAP_PSM,
                UINT_DESC_TYPE, (UINT32)2, temp);
    }

    /* Make the service browseable */
    status &= SDP_AddUuidSequence (sdp_handle, ATTR_ID_BROWSE_GROUP_LIST, 1, &browse);

    if (!status)
    {
        SDP_DeleteRecord(sdp_handle);
        sdp_handle = 0;
        APPL_TRACE_ERROR("%s() FAILED", __func__);
    }
    else
    {
        bta_sys_add_uuid(service);  /* UUID_SERVCLASS_MESSAGE_ACCESS */
        APPL_TRACE_DEBUG("%s():  SDP Registered (handle 0x%08x)", __func__, sdp_handle);
    }
    return sdp_handle;
}


/* Create a OPP Server SDP record based on information stored in a bluetooth_sdp_ops_record */
static int add_opps_sdp(const bluetooth_sdp_ops_record* rec)
{

    tSDP_PROTOCOL_ELEM  protoList [3];
    UINT16              service = UUID_SERVCLASS_OBEX_OBJECT_PUSH;
    UINT16              browse = UUID_SERVCLASS_PUBLIC_BROWSE_GROUP;
    UINT8               type_len[rec->supported_formats_list_len];
    UINT8               desc_type[rec->supported_formats_list_len];
    UINT8              *type_value[rec->supported_formats_list_len];
    BOOLEAN             status = TRUE;
    UINT32              sdp_handle = 0;
    UINT8               temp[4];
    UINT8*              p_temp = temp;
    tBTA_UTL_COD        cod;
    int i,j;

    APPL_TRACE_DEBUG("%s(): scn 0x%02x, psm = 0x%04x\n  service name %s", __func__,
            rec->hdr.rfcomm_channel_number, rec->hdr.l2cap_psm, rec->hdr.service_name);

    APPL_TRACE_DEBUG("  supported formats count: %d",
            rec->supported_formats_list_len);

    if ((sdp_handle = SDP_CreateRecord()) == 0)
    {
        APPL_TRACE_ERROR("%s(): Unable to register Object Push Server Service", __func__);
        return sdp_handle;
    }

    /* add service class */
    status &= SDP_AddServiceClassIdList(sdp_handle, 1, &service);
    memset( protoList, 0 , 3*sizeof(tSDP_PROTOCOL_ELEM) );

    /* add protocol list, including RFCOMM scn */
    protoList[0].protocol_uuid = UUID_PROTOCOL_L2CAP;
    protoList[0].num_params = 0;
    protoList[1].protocol_uuid = UUID_PROTOCOL_RFCOMM;
    protoList[1].num_params = 1;
    protoList[1].params[0] = rec->hdr.rfcomm_channel_number;
    protoList[2].protocol_uuid = UUID_PROTOCOL_OBEX;
    protoList[2].num_params = 0;
    status &= SDP_AddProtocolList(sdp_handle, 3, protoList);

    /* Add a name entry */
    status &= SDP_AddAttribute(sdp_handle,
                    (UINT16)ATTR_ID_SERVICE_NAME,
                    (UINT8)TEXT_STR_DESC_TYPE,
                    (UINT32)(rec->hdr.service_name_length + 1),
                    (UINT8 *)rec->hdr.service_name);

    /* Add in the Bluetooth Profile Descriptor List */
    status &= SDP_AddProfileDescriptorList(sdp_handle,
                                     UUID_SERVCLASS_OBEX_OBJECT_PUSH,
                                     rec->hdr.profile_version);

    /* add sequence for supported types */
    for (i = 0, j = 0; i < rec->supported_formats_list_len; i++)
    {
        type_value[j] = (UINT8 *) &rec->supported_formats_list[i];
        desc_type[j] = UINT_DESC_TYPE;
        type_len[j++] = 1;
    }

    status &= SDP_AddSequence(sdp_handle, (UINT16) ATTR_ID_SUPPORTED_FORMATS_LIST,
        (UINT8) rec->supported_formats_list_len, desc_type, type_len, type_value);

    /* Add the L2CAP PSM if present */
    if(rec->hdr.l2cap_psm != -1) {
        p_temp = temp;// The macro modifies p_temp, hence rewind.
        UINT16_TO_BE_STREAM(p_temp, rec->hdr.l2cap_psm);
        status &= SDP_AddAttribute(sdp_handle, ATTR_ID_GOEP_L2CAP_PSM,
                UINT_DESC_TYPE, (UINT32)2, temp);
    }

    /* Make the service browseable */
    status &= SDP_AddUuidSequence (sdp_handle, ATTR_ID_BROWSE_GROUP_LIST, 1, &browse);

    if (!status)
    {
        SDP_DeleteRecord(sdp_handle);
        sdp_handle = 0;
        APPL_TRACE_ERROR("%s() FAILED", __func__);
    }
    else
    {
        /* set class of device */
        cod.service = BTM_COD_SERVICE_OBJ_TRANSFER;
        utl_set_device_class(&cod, BTA_UTL_SET_COD_SERVICE_CLASS);

        bta_sys_add_uuid(service);  /* UUID_SERVCLASS_OBEX_OBJECT_PUSH */
        APPL_TRACE_DEBUG("%s():  SDP Registered (handle 0x%08x)", __func__, sdp_handle);
    }
    return sdp_handle;
}

// Create a Sim Access Profile SDP record based on information stored in a bluetooth_sdp_sap_record.
static int add_saps_sdp(const bluetooth_sdp_sap_record* rec)
{
    tSDP_PROTOCOL_ELEM  protoList [2];
    UINT16              services[2];
    UINT16              browse = UUID_SERVCLASS_PUBLIC_BROWSE_GROUP;
    BOOLEAN             status = TRUE;
    UINT32              sdp_handle = 0;

    APPL_TRACE_DEBUG("%s(): scn 0x%02x, service name %s", __func__,
            rec->hdr.rfcomm_channel_number, rec->hdr.service_name);

    if ((sdp_handle = SDP_CreateRecord()) == 0)
    {
        APPL_TRACE_ERROR("%s(): Unable to register SAPS Service", __func__);
        return sdp_handle;
    }

    services[0] = UUID_SERVCLASS_SAP;
    services[1] = UUID_SERVCLASS_GENERIC_TELEPHONY;

    // add service class
    status &= SDP_AddServiceClassIdList(sdp_handle, 2, services);
    memset(protoList, 0, 2 * sizeof(tSDP_PROTOCOL_ELEM));

    // add protocol list, including RFCOMM scn
    protoList[0].protocol_uuid = UUID_PROTOCOL_L2CAP;
    protoList[0].num_params = 0;
    protoList[1].protocol_uuid = UUID_PROTOCOL_RFCOMM;
    protoList[1].num_params = 1;
    protoList[1].params[0] = rec->hdr.rfcomm_channel_number;
    status &= SDP_AddProtocolList(sdp_handle, 2, protoList);

    // Add a name entry
    status &= SDP_AddAttribute(sdp_handle,
                    (UINT16)ATTR_ID_SERVICE_NAME,
                    (UINT8)TEXT_STR_DESC_TYPE,
                    (UINT32)(rec->hdr.service_name_length + 1),
                    (UINT8 *)rec->hdr.service_name);

    // Add in the Bluetooth Profile Descriptor List
    status &= SDP_AddProfileDescriptorList(sdp_handle,
            UUID_SERVCLASS_SAP,
            rec->hdr.profile_version);

    // Make the service browseable
    status &= SDP_AddUuidSequence (sdp_handle, ATTR_ID_BROWSE_GROUP_LIST, 1, &browse);

    if (!status)
    {
        SDP_DeleteRecord(sdp_handle);
        sdp_handle = 0;
        APPL_TRACE_ERROR("%s(): FAILED deleting record", __func__);
    }
    else
    {
        bta_sys_add_uuid(UUID_SERVCLASS_SAP);
        APPL_TRACE_DEBUG("%s(): SDP Registered (handle 0x%08x)", __func__, sdp_handle);
    }
    return sdp_handle;
}