include/hardware/bt_sdp.h

/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * 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.
 */

#pragma once

#include "bluetooth.h"

#define SDP_OPP_SUPPORTED_FORMATS_MAX_LENGTH 15

__BEGIN_DECLS

/**
 * These events are handled by the state machine
 */
typedef enum {
    SDP_TYPE_RAW, // Used to carry raw SDP search data for unknown UUID's 
    SDP_TYPE_MAP_MAS,
    SDP_TYPE_MAP_MNS,
    SDP_TYPE_PBAP_PSE,
    SDP_TYPE_PBAP_PCE,
    SDP_TYPE_OPP_SERVER
} bluetooth_sdp_types;

typedef struct _bluetooth_sdp_hdr {
    bluetooth_sdp_types type;
    bt_uuid_t   uuid;
    uint32_t    service_name_length;
    char       *service_name;
    int32_t     rfcomm_channel_number;
    int32_t     l2cap_psm;
    int32_t     profile_version;
} bluetooth_sdp_hdr;

/**
 * Some signals need additional pointers, hence we introduce a
 * generic way to handle these pointers.
 */
typedef struct _bluetooth_sdp_hdr_overlay {
    bluetooth_sdp_types type;
    bt_uuid_t   uuid;
    uint32_t    service_name_length;
    char       *service_name;
    int32_t     rfcomm_channel_number;
    int32_t     l2cap_psm;
    int32_t     profile_version;

    // User pointers, only used for some signals - see bluetooth_sdp_ops_record
    int         user1_ptr_len;
    uint8_t    *user1_ptr;
    int         user2_ptr_len;
    uint8_t    *user2_ptr;
} bluetooth_sdp_hdr_overlay;

typedef struct _bluetooth_sdp_mas_record {
    bluetooth_sdp_hdr_overlay hdr;
    uint32_t    mas_instance_id;
    uint32_t    supported_features;
    uint32_t    supported_message_types;
} bluetooth_sdp_mas_record;

typedef struct _bluetooth_sdp_mns_record {
    bluetooth_sdp_hdr_overlay hdr;
    uint32_t    supported_features;
} bluetooth_sdp_mns_record;

typedef struct _bluetooth_sdp_pse_record {
    bluetooth_sdp_hdr_overlay hdr;
    uint32_t    supported_features;
    uint32_t    supported_repositories;
} bluetooth_sdp_pse_record;

typedef struct _bluetooth_sdp_pce_record {
    bluetooth_sdp_hdr_overlay hdr;
} bluetooth_sdp_pce_record;

typedef struct _bluetooth_sdp_ops_record {
    bluetooth_sdp_hdr_overlay hdr;
    int         supported_formats_list_len;
    uint8_t     supported_formats_list[SDP_OPP_SUPPORTED_FORMATS_MAX_LENGTH];
} bluetooth_sdp_ops_record;

typedef union {
    bluetooth_sdp_hdr_overlay   hdr;
    bluetooth_sdp_mas_record    mas;
    bluetooth_sdp_mns_record    mns;
    bluetooth_sdp_pse_record    pse;
    bluetooth_sdp_pce_record    pce;
    bluetooth_sdp_ops_record    ops;
} bluetooth_sdp_record;


/** Callback for SDP search */
typedef void (*btsdp_search_callback)(bt_status_t status, bt_bdaddr_t *bd_addr, uint8_t* uuid, int num_records, bluetooth_sdp_record *records);

typedef struct {
    /** Set to sizeof(btsdp_callbacks_t) */
    size_t      size;
    btsdp_search_callback  sdp_search_cb;
} btsdp_callbacks_t;

typedef struct {
    /** Set to size of this struct */
    size_t size;

    /** Register BT SDP search callbacks */
    bt_status_t (*init)(btsdp_callbacks_t *callbacks);

    /** Unregister BT SDP */
    bt_status_t (*deinit)();

    /** Search for SDP records with specific uuid on remote device */
    bt_status_t (*sdp_search)(bt_bdaddr_t *bd_addr,  const uint8_t* uuid);

    /**
     * Use listen in the socket interface to create rfcomm and/or l2cap PSM channels,
     * (without UUID and service_name and set the BTSOCK_FLAG_NO_SDP flag in flags).
     * Then use createSdpRecord to create the SDP record associated with the rfcomm/l2cap channels.
     *
     * Returns a handle to the SDP record, which can be parsed to remove_sdp_record.
     *
     * record           (in) The SDP record to create
     * record_handle    (out)The corresponding record handle will be written to this pointer.
     */
    bt_status_t (*create_sdp_record)(bluetooth_sdp_record *record, int* record_handle);

    /** Remove a SDP record created by createSdpRecord */
    bt_status_t (*remove_sdp_record)(int sdp_handle);
} btsdp_interface_t;

__END_DECLS