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zephyr/include/bluetooth/sdp.h

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/** @file
* @brief Service Discovery Protocol handling.
*/
/*
* Copyright (c) 2016 Intel Corporation
*
* SPDX-License-Identifier: Apache-2.0
*/
#ifndef __BT_SDP_H
#define __BT_SDP_H
/**
* @brief Service Discovery Protocol (SDP)
* @defgroup bt_sdp Service Discovery Protocol (SDP)
* @ingroup bluetooth
* @{
*/
#ifdef __cplusplus
extern "C" {
#endif
#include <bluetooth/uuid.h>
#include <bluetooth/conn.h>
/*
* All definitions are based on Bluetooth Assigned Numbers
* of the Bluetooth Specification
*/
/*
* Service class identifiers of standard services and service groups
*/
#define BT_SDP_SDP_SERVER_SVCLASS 0x1000
#define BT_SDP_BROWSE_GRP_DESC_SVCLASS 0x1001
#define BT_SDP_PUBLIC_BROWSE_GROUP 0x1002
#define BT_SDP_SERIAL_PORT_SVCLASS 0x1101
#define BT_SDP_LAN_ACCESS_SVCLASS 0x1102
#define BT_SDP_DIALUP_NET_SVCLASS 0x1103
#define BT_SDP_IRMC_SYNC_SVCLASS 0x1104
#define BT_SDP_OBEX_OBJPUSH_SVCLASS 0x1105
#define BT_SDP_OBEX_FILETRANS_SVCLASS 0x1106
#define BT_SDP_IRMC_SYNC_CMD_SVCLASS 0x1107
#define BT_SDP_HEADSET_SVCLASS 0x1108
#define BT_SDP_CORDLESS_TELEPHONY_SVCLASS 0x1109
#define BT_SDP_AUDIO_SOURCE_SVCLASS 0x110a
#define BT_SDP_AUDIO_SINK_SVCLASS 0x110b
#define BT_SDP_AV_REMOTE_TARGET_SVCLASS 0x110c
#define BT_SDP_ADVANCED_AUDIO_SVCLASS 0x110d
#define BT_SDP_AV_REMOTE_SVCLASS 0x110e
#define BT_SDP_AV_REMOTE_CONTROLLER_SVCLASS 0x110f
#define BT_SDP_INTERCOM_SVCLASS 0x1110
#define BT_SDP_FAX_SVCLASS 0x1111
#define BT_SDP_HEADSET_AGW_SVCLASS 0x1112
#define BT_SDP_WAP_SVCLASS 0x1113
#define BT_SDP_WAP_CLIENT_SVCLASS 0x1114
#define BT_SDP_PANU_SVCLASS 0x1115
#define BT_SDP_NAP_SVCLASS 0x1116
#define BT_SDP_GN_SVCLASS 0x1117
#define BT_SDP_DIRECT_PRINTING_SVCLASS 0x1118
#define BT_SDP_REFERENCE_PRINTING_SVCLASS 0x1119
#define BT_SDP_IMAGING_SVCLASS 0x111a
#define BT_SDP_IMAGING_RESPONDER_SVCLASS 0x111b
#define BT_SDP_IMAGING_ARCHIVE_SVCLASS 0x111c
#define BT_SDP_IMAGING_REFOBJS_SVCLASS 0x111d
#define BT_SDP_HANDSFREE_SVCLASS 0x111e
#define BT_SDP_HANDSFREE_AGW_SVCLASS 0x111f
#define BT_SDP_DIRECT_PRT_REFOBJS_SVCLASS 0x1120
#define BT_SDP_REFLECTED_UI_SVCLASS 0x1121
#define BT_SDP_BASIC_PRINTING_SVCLASS 0x1122
#define BT_SDP_PRINTING_STATUS_SVCLASS 0x1123
#define BT_SDP_HID_SVCLASS 0x1124
#define BT_SDP_HCR_SVCLASS 0x1125
#define BT_SDP_HCR_PRINT_SVCLASS 0x1126
#define BT_SDP_HCR_SCAN_SVCLASS 0x1127
#define BT_SDP_CIP_SVCLASS 0x1128
#define BT_SDP_VIDEO_CONF_GW_SVCLASS 0x1129
#define BT_SDP_UDI_MT_SVCLASS 0x112a
#define BT_SDP_UDI_TA_SVCLASS 0x112b
#define BT_SDP_AV_SVCLASS 0x112c
#define BT_SDP_SAP_SVCLASS 0x112d
#define BT_SDP_PBAP_PCE_SVCLASS 0x112e
#define BT_SDP_PBAP_PSE_SVCLASS 0x112f
#define BT_SDP_PBAP_SVCLASS 0x1130
#define BT_SDP_MAP_MSE_SVCLASS 0x1132
#define BT_SDP_MAP_MCE_SVCLASS 0x1133
#define BT_SDP_MAP_SVCLASS 0x1134
#define BT_SDP_GNSS_SVCLASS 0x1135
#define BT_SDP_GNSS_SERVER_SVCLASS 0x1136
#define BT_SDP_MPS_SC_SVCLASS 0x113a
#define BT_SDP_MPS_SVCLASS 0x113b
#define BT_SDP_PNP_INFO_SVCLASS 0x1200
#define BT_SDP_GENERIC_NETWORKING_SVCLASS 0x1201
#define BT_SDP_GENERIC_FILETRANS_SVCLASS 0x1202
#define BT_SDP_GENERIC_AUDIO_SVCLASS 0x1203
#define BT_SDP_GENERIC_TELEPHONY_SVCLASS 0x1204
#define BT_SDP_UPNP_SVCLASS 0x1205
#define BT_SDP_UPNP_IP_SVCLASS 0x1206
#define BT_SDP_UPNP_PAN_SVCLASS 0x1300
#define BT_SDP_UPNP_LAP_SVCLASS 0x1301
#define BT_SDP_UPNP_L2CAP_SVCLASS 0x1302
#define BT_SDP_VIDEO_SOURCE_SVCLASS 0x1303
#define BT_SDP_VIDEO_SINK_SVCLASS 0x1304
#define BT_SDP_VIDEO_DISTRIBUTION_SVCLASS 0x1305
#define BT_SDP_HDP_SVCLASS 0x1400
#define BT_SDP_HDP_SOURCE_SVCLASS 0x1401
#define BT_SDP_HDP_SINK_SVCLASS 0x1402
#define BT_SDP_GENERIC_ACCESS_SVCLASS 0x1800
#define BT_SDP_GENERIC_ATTRIB_SVCLASS 0x1801
#define BT_SDP_APPLE_AGENT_SVCLASS 0x2112
/*
* Attribute identifier codes
*/
#define BT_SDP_SERVER_RECORD_HANDLE 0x0000
/*
* Possible values for attribute-id are listed below.
* See SDP Spec, section "Service Attribute Definitions" for more details.
*/
#define BT_SDP_ATTR_RECORD_HANDLE 0x0000
#define BT_SDP_ATTR_SVCLASS_ID_LIST 0x0001
#define BT_SDP_ATTR_RECORD_STATE 0x0002
#define BT_SDP_ATTR_SERVICE_ID 0x0003
#define BT_SDP_ATTR_PROTO_DESC_LIST 0x0004
#define BT_SDP_ATTR_BROWSE_GRP_LIST 0x0005
#define BT_SDP_ATTR_LANG_BASE_ATTR_ID_LIST 0x0006
#define BT_SDP_ATTR_SVCINFO_TTL 0x0007
#define BT_SDP_ATTR_SERVICE_AVAILABILITY 0x0008
#define BT_SDP_ATTR_PROFILE_DESC_LIST 0x0009
#define BT_SDP_ATTR_DOC_URL 0x000a
#define BT_SDP_ATTR_CLNT_EXEC_URL 0x000b
#define BT_SDP_ATTR_ICON_URL 0x000c
#define BT_SDP_ATTR_ADD_PROTO_DESC_LIST 0x000d
#define BT_SDP_ATTR_GROUP_ID 0x0200
#define BT_SDP_ATTR_IP_SUBNET 0x0200
#define BT_SDP_ATTR_VERSION_NUM_LIST 0x0200
#define BT_SDP_ATTR_SUPPORTED_FEATURES_LIST 0x0200
#define BT_SDP_ATTR_GOEP_L2CAP_PSM 0x0200
#define BT_SDP_ATTR_SVCDB_STATE 0x0201
#define BT_SDP_ATTR_MPSD_SCENARIOS 0x0200
#define BT_SDP_ATTR_MPMD_SCENARIOS 0x0201
#define BT_SDP_ATTR_MPS_DEPENDENCIES 0x0202
#define BT_SDP_ATTR_SERVICE_VERSION 0x0300
#define BT_SDP_ATTR_EXTERNAL_NETWORK 0x0301
#define BT_SDP_ATTR_SUPPORTED_DATA_STORES_LIST 0x0301
#define BT_SDP_ATTR_DATA_EXCHANGE_SPEC 0x0301
#define BT_SDP_ATTR_NETWORK 0x0301
#define BT_SDP_ATTR_FAX_CLASS1_SUPPORT 0x0302
#define BT_SDP_ATTR_REMOTE_AUDIO_VOLUME_CONTROL 0x0302
#define BT_SDP_ATTR_MCAP_SUPPORTED_PROCEDURES 0x0302
#define BT_SDP_ATTR_FAX_CLASS20_SUPPORT 0x0303
#define BT_SDP_ATTR_SUPPORTED_FORMATS_LIST 0x0303
#define BT_SDP_ATTR_FAX_CLASS2_SUPPORT 0x0304
#define BT_SDP_ATTR_AUDIO_FEEDBACK_SUPPORT 0x0305
#define BT_SDP_ATTR_NETWORK_ADDRESS 0x0306
#define BT_SDP_ATTR_WAP_GATEWAY 0x0307
#define BT_SDP_ATTR_HOMEPAGE_URL 0x0308
#define BT_SDP_ATTR_WAP_STACK_TYPE 0x0309
#define BT_SDP_ATTR_SECURITY_DESC 0x030a
#define BT_SDP_ATTR_NET_ACCESS_TYPE 0x030b
#define BT_SDP_ATTR_MAX_NET_ACCESSRATE 0x030c
#define BT_SDP_ATTR_IP4_SUBNET 0x030d
#define BT_SDP_ATTR_IP6_SUBNET 0x030e
#define BT_SDP_ATTR_SUPPORTED_CAPABILITIES 0x0310
#define BT_SDP_ATTR_SUPPORTED_FEATURES 0x0311
#define BT_SDP_ATTR_SUPPORTED_FUNCTIONS 0x0312
#define BT_SDP_ATTR_TOTAL_IMAGING_DATA_CAPACITY 0x0313
#define BT_SDP_ATTR_SUPPORTED_REPOSITORIES 0x0314
#define BT_SDP_ATTR_MAS_INSTANCE_ID 0x0315
#define BT_SDP_ATTR_SUPPORTED_MESSAGE_TYPES 0x0316
#define BT_SDP_ATTR_PBAP_SUPPORTED_FEATURES 0x0317
#define BT_SDP_ATTR_MAP_SUPPORTED_FEATURES 0x0317
#define BT_SDP_ATTR_SPECIFICATION_ID 0x0200
#define BT_SDP_ATTR_VENDOR_ID 0x0201
#define BT_SDP_ATTR_PRODUCT_ID 0x0202
#define BT_SDP_ATTR_VERSION 0x0203
#define BT_SDP_ATTR_PRIMARY_RECORD 0x0204
#define BT_SDP_ATTR_VENDOR_ID_SOURCE 0x0205
#define BT_SDP_ATTR_HID_DEVICE_RELEASE_NUMBER 0x0200
#define BT_SDP_ATTR_HID_PARSER_VERSION 0x0201
#define BT_SDP_ATTR_HID_DEVICE_SUBCLASS 0x0202
#define BT_SDP_ATTR_HID_COUNTRY_CODE 0x0203
#define BT_SDP_ATTR_HID_VIRTUAL_CABLE 0x0204
#define BT_SDP_ATTR_HID_RECONNECT_INITIATE 0x0205
#define BT_SDP_ATTR_HID_DESCRIPTOR_LIST 0x0206
#define BT_SDP_ATTR_HID_LANG_ID_BASE_LIST 0x0207
#define BT_SDP_ATTR_HID_SDP_DISABLE 0x0208
#define BT_SDP_ATTR_HID_BATTERY_POWER 0x0209
#define BT_SDP_ATTR_HID_REMOTE_WAKEUP 0x020a
#define BT_SDP_ATTR_HID_PROFILE_VERSION 0x020b
#define BT_SDP_ATTR_HID_SUPERVISION_TIMEOUT 0x020c
#define BT_SDP_ATTR_HID_NORMALLY_CONNECTABLE 0x020d
#define BT_SDP_ATTR_HID_BOOT_DEVICE 0x020e
/*
* These identifiers are based on the SDP spec stating that
* "base attribute id of the primary (universal) language must be 0x0100"
*
* Other languages should have their own offset; e.g.:
* #define XXXLangBase yyyy
* #define AttrServiceName_XXX 0x0000+XXXLangBase
*/
#define BT_SDP_PRIMARY_LANG_BASE 0x0100
#define BT_SDP_ATTR_SVCNAME_PRIMARY (0x0000 + BT_SDP_PRIMARY_LANG_BASE)
#define BT_SDP_ATTR_SVCDESC_PRIMARY (0x0001 + BT_SDP_PRIMARY_LANG_BASE)
#define BT_SDP_ATTR_PROVNAME_PRIMARY (0x0002 + BT_SDP_PRIMARY_LANG_BASE)
/*
* The Data representation in SDP PDUs (pps 339, 340 of BT SDP Spec)
* These are the exact data type+size descriptor values
* that go into the PDU buffer.
*
* The datatype (leading 5bits) + size descriptor (last 3 bits)
* is 8 bits. The size descriptor is critical to extract the
* right number of bytes for the data value from the PDU.
*
* For most basic types, the datatype+size descriptor is
* straightforward. However for constructed types and strings,
* the size of the data is in the next "n" bytes following the
* 8 bits (datatype+size) descriptor. Exactly what the "n" is
* specified in the 3 bits of the data size descriptor.
*
* TextString and URLString can be of size 2^{8, 16, 32} bytes
* DataSequence and DataSequenceAlternates can be of size 2^{8, 16, 32}
* The size are computed post-facto in the API and are not known apriori
*/
#define BT_SDP_DATA_NIL 0x00
#define BT_SDP_UINT8 0x08
#define BT_SDP_UINT16 0x09
#define BT_SDP_UINT32 0x0a
#define BT_SDP_UINT64 0x0b
#define BT_SDP_UINT128 0x0c
#define BT_SDP_INT8 0x10
#define BT_SDP_INT16 0x11
#define BT_SDP_INT32 0x12
#define BT_SDP_INT64 0x13
#define BT_SDP_INT128 0x14
#define BT_SDP_UUID_UNSPEC 0x18
#define BT_SDP_UUID16 0x19
#define BT_SDP_UUID32 0x1a
#define BT_SDP_UUID128 0x1c
#define BT_SDP_TEXT_STR_UNSPEC 0x20
#define BT_SDP_TEXT_STR8 0x25
#define BT_SDP_TEXT_STR16 0x26
#define BT_SDP_TEXT_STR32 0x27
#define BT_SDP_BOOL 0x28
#define BT_SDP_SEQ_UNSPEC 0x30
#define BT_SDP_SEQ8 0x35
#define BT_SDP_SEQ16 0x36
#define BT_SDP_SEQ32 0x37
#define BT_SDP_ALT_UNSPEC 0x38
#define BT_SDP_ALT8 0x3d
#define BT_SDP_ALT16 0x3e
#define BT_SDP_ALT32 0x3f
#define BT_SDP_URL_STR_UNSPEC 0x40
#define BT_SDP_URL_STR8 0x45
#define BT_SDP_URL_STR16 0x46
#define BT_SDP_URL_STR32 0x47
#define BT_SDP_TYPE_DESC_MASK 0xf8
#define BT_SDP_SIZE_DESC_MASK 0x07
#define BT_SDP_SIZE_INDEX_OFFSET 5
/** @brief SDP Generic Data Element Value. */
struct bt_sdp_data_elem {
u8_t type;
u32_t data_size;
u32_t total_size;
const void *data;
};
/** @brief SDP Attribute Value. */
struct bt_sdp_attribute {
u16_t id; /* Attribute ID */
struct bt_sdp_data_elem val; /* Attribute data */
};
/** @brief SDP Service Record Value. */
struct bt_sdp_record {
u32_t handle; /* Redundant, for quick ref */
struct bt_sdp_attribute *attrs; /* Base addr of attr array */
size_t attr_count; /* Number of attributes */
u8_t index; /* Index of the record in LL */
struct bt_sdp_record *next;
};
/*
* --------------------------------------------------- ------------------
* | Service Hdl | Attr list ptr | Attr count | Next | -> | Service Hdl | ...
* --------------------------------------------------- ------------------
*/
/** @def BT_SDP_ARRAY_8
* @brief Declare an array of 8-bit elements in an attribute.
*/
#define BT_SDP_ARRAY_8(...) ((u8_t[]) {__VA_ARGS__})
/** @def BT_SDP_ARRAY_16
* @brief Declare an array of 16-bit elements in an attribute.
*/
#define BT_SDP_ARRAY_16(...) ((u16_t[]) {__VA_ARGS__})
/** @def BT_SDP_ARRAY_32
* @brief Declare an array of 32-bit elements in an attribute.
*/
#define BT_SDP_ARRAY_32(...) ((u32_t[]) {__VA_ARGS__})
/** @def BT_SDP_TYPE_SIZE
* @brief Declare a fixed-size data element header.
*
* @param _type Data element header containing type and size descriptors.
*/
#define BT_SDP_TYPE_SIZE(_type) .type = _type, \
.data_size = BIT(_type & BT_SDP_SIZE_DESC_MASK), \
.total_size = BIT(_type & BT_SDP_SIZE_DESC_MASK) + 1
/** @def BT_SDP_TYPE_SIZE_VAR
* @brief Declare a variable-size data element header.
*
* @param _type Data element header containing type and size descriptors.
* @param _size The actual size of the data.
*/
#define BT_SDP_TYPE_SIZE_VAR(_type, _size) .type = _type, \
.data_size = _size, \
.total_size = BIT((_type & BT_SDP_SIZE_DESC_MASK) - \
BT_SDP_SIZE_INDEX_OFFSET) + _size + 1
/** @def BT_SDP_DATA_ELEM_LIST
* @brief Declare a list of data elements.
*/
#define BT_SDP_DATA_ELEM_LIST(...) ((struct bt_sdp_data_elem[]) {__VA_ARGS__})
/** @def BT_SDP_NEW_SERVICE
* @brief SDP New Service Record Declaration Macro.
*
* Helper macro to declare a new service record.
* Default attributes: Record Handle, Record State,
* Language Base, Root Browse Group
*
*/
#define BT_SDP_NEW_SERVICE \
{ \
BT_SDP_ATTR_RECORD_HANDLE, \
{ BT_SDP_TYPE_SIZE(BT_SDP_UINT32), BT_SDP_ARRAY_32(0) } \
}, \
{ \
BT_SDP_ATTR_RECORD_STATE, \
{ BT_SDP_TYPE_SIZE(BT_SDP_UINT32), BT_SDP_ARRAY_32(0) } \
}, \
{ \
BT_SDP_ATTR_LANG_BASE_ATTR_ID_LIST, \
{ BT_SDP_TYPE_SIZE_VAR(BT_SDP_SEQ8, 9), \
BT_SDP_DATA_ELEM_LIST( \
{ BT_SDP_TYPE_SIZE(BT_SDP_UINT16), BT_SDP_ARRAY_8('n', 'e') }, \
{ BT_SDP_TYPE_SIZE(BT_SDP_UINT16), BT_SDP_ARRAY_16(106) }, \
{ BT_SDP_TYPE_SIZE(BT_SDP_UINT16), \
BT_SDP_ARRAY_16(BT_SDP_PRIMARY_LANG_BASE) } \
), \
} \
}, \
{ \
BT_SDP_ATTR_BROWSE_GRP_LIST, \
{ BT_SDP_TYPE_SIZE_VAR(BT_SDP_SEQ8, 3), \
BT_SDP_DATA_ELEM_LIST( \
{ BT_SDP_TYPE_SIZE(BT_SDP_UUID16), \
BT_SDP_ARRAY_16(BT_SDP_PUBLIC_BROWSE_GROUP) }, \
), \
} \
}
/** @def BT_SDP_LIST
* @brief Generic SDP List Attribute Declaration Macro.
*
* Helper macro to declare a list attribute.
*
* @param _att_id List Attribute ID.
* @param _data_elem_seq Data element sequence for the list.
* @param _type_size SDP type and size descriptor.
*/
#define BT_SDP_LIST(_att_id, _type_size, _data_elem_seq) \
{ \
_att_id, { _type_size, _data_elem_seq } \
}
/** @def BT_SDP_SERVICE_ID
* @brief SDP Service ID Attribute Declaration Macro.
*
* Helper macro to declare a service ID attribute.
*
* @param _uuid Service ID 16bit UUID.
*/
#define BT_SDP_SERVICE_ID(_uuid) \
{ \
BT_SDP_ATTR_SERVICE_ID, \
{ BT_SDP_TYPE_SIZE(BT_SDP_UUID16), &((struct bt_uuid_16) _uuid) } \
}
/** @def BT_SDP_SERVICE_NAME
* @brief SDP Name Attribute Declaration Macro.
*
* Helper macro to declare a service name attribute.
*
* @param _name Service name as a string (up to 256 chars).
*/
#define BT_SDP_SERVICE_NAME(_name) \
{ \
BT_SDP_ATTR_SVCNAME_PRIMARY, \
{ BT_SDP_TYPE_SIZE_VAR(BT_SDP_TEXT_STR8, (sizeof(_name)-1)), _name } \
}
/** @def BT_SDP_SUPPORTED_FEATURES
* @brief SDP Supported Features Attribute Declaration Macro.
*
* Helper macro to declare supported features of a profile/protocol.
*
* @param _features Feature mask as 16bit unsigned integer.
*/
#define BT_SDP_SUPPORTED_FEATURES(_features) \
{ \
BT_SDP_ATTR_SUPPORTED_FEATURES, \
{ BT_SDP_TYPE_SIZE(BT_SDP_UINT16), BT_SDP_ARRAY_16(_features) } \
}
/** @def BT_SDP_RECORD
* @brief SDP Service Declaration Macro.
*
* Helper macro to declare a service.
*
* @param _attrs List of attributes for the service record.
*/
#define BT_SDP_RECORD(_attrs) \
{ \
.attrs = _attrs, \
.attr_count = ARRAY_SIZE((_attrs)), \
}
/* Server API */
/** @brief Register a Service Record.
*
* Register a Service Record. Applications can make use of
* macros such as BT_SDP_DECLARE_SERVICE, BT_SDP_LIST,
* BT_SDP_SERVICE_ID, BT_SDP_SERVICE_NAME, etc.
* A service declaration must start with BT_SDP_NEW_SERVICE.
*
* @param service Service record declared using BT_SDP_DECLARE_SERVICE.
*
* @return 0 in case of success or negative value in case of error.
*/
int bt_sdp_register_service(struct bt_sdp_record *service);
/* Client API */
/** @brief Generic SDP Client Query Result data holder */
struct bt_sdp_client_result {
/* buffer containing unparsed SDP record result for given UUID */
struct net_buf *resp_buf;
/* flag pointing that there are more result chunks for given UUID */
bool next_record_hint;
/* Reference to UUID object on behalf one discovery was started */
const struct bt_uuid *uuid;
};
/** @brief Helper enum to be used as return value of bt_sdp_discover_func_t.
* The value informs the caller to perform futher pending actions or stop them.
*/
enum {
BT_SDP_DISCOVER_UUID_STOP = 0,
BT_SDP_DISCOVER_UUID_CONTINUE,
};
/** @typedef bt_sdp_discover_func_t
*
* @brief Callback type reporting to user that there is a resolved result
* on remote for given UUID and the result record buffer can be used by user
* for futher inspection.
*
* A function of this type is given by the user to the bt_sdp_discover_params
* object. It'll be called on each valid record discovery completion for given
* UUID. When UUID resolution gives back no records then NULL is passed
* to the user. Otherwise user can get valid record(s) and then the internal
* hint 'next record' is set to false saying the UUID resolution is complete or
* the hint can be set by caller to true meaning that next record is available
* for given UUID.
* The returned function value allows the user to control retrieving follow-up
* resolved records if any. If the user doesn't want to read more resolved
* records for given UUID since current record data fulfills its requirements
* then should return BT_SDP_DISCOVER_UUID_STOP. Otherwise returned value means
* more subcall iterations are allowable.
*
* @param conn Connection object identifying connection to queried remote.
* @param result Object pointing to logical unparsed SDP record collected on
* base of response driven by given UUID.
*
* @return BT_SDP_DISCOVER_UUID_STOP in case of no more need to read next
* record data and continue discovery for given UUID. By returning
* BT_SDP_DISCOVER_UUID_CONTINUE user allows this discovery continuation.
*/
typedef u8_t (*bt_sdp_discover_func_t)
(struct bt_conn *conn, struct bt_sdp_client_result *result);
/** @brief Main user structure used in SDP discovery of remote. */
struct bt_sdp_discover_params {
sys_snode_t _node;
/** UUID (service) to be discovered on remote SDP entity */
const struct bt_uuid *uuid;
/** Discover callback to be called on resolved SDP record */
bt_sdp_discover_func_t func;
/** Memory buffer enabled by user for SDP query results */
struct net_buf_pool *pool;
};
/** @brief Allows user to start SDP discovery session.
*
* The function performs SDP service discovery on remote server driven by user
* delivered discovery parameters. Discovery session is made as soon as
* no SDP transaction is ongoing between peers and if any then this one
* is queued to be processed at discovery completion of previous one.
* On the service discovery completion the callback function will be
* called to get feedback to user about findings.
*
* @param conn Object identifying connection to remote.
* @param params SDP discovery parameters.
*
* @return 0 in case of success or negative value in case of error.
*/
int bt_sdp_discover(struct bt_conn *conn,
const struct bt_sdp_discover_params *params);
/** @brief Release waiting SDP discovery request.
*
* It can cancel valid waiting SDP client request identified by SDP discovery
* parameters object.
*
* @param conn Object identifying connection to remote.
* @param params SDP discovery parameters.
*
* @return 0 in case of success or negative value in case of error.
*/
int bt_sdp_discover_cancel(struct bt_conn *conn,
const struct bt_sdp_discover_params *params);
/* Helper types & functions for SDP client to get essential data from server */
/** @brief Protocols to be asked about specific parameters */
enum bt_sdp_proto {
BT_SDP_PROTO_RFCOMM = BT_UUID_RFCOMM_VAL,
BT_SDP_PROTO_L2CAP = BT_UUID_L2CAP_VAL,
};
/** @brief Give to user parameter value related to given stacked protocol UUID.
*
* API extracts specific parameter associated with given protocol UUID
* available in Protocol Descriptor List attribute.
*
* @param buf Original buffered raw record data.
* @param proto Known protocol to be checked like RFCOMM or L2CAP.
* @param param On success populated by found parameter value.
*
* @return 0 on success when specific parameter associated with given protocol
* value is found, or negative if error occurred during processing.
*/
int bt_sdp_get_proto_param(const struct net_buf *buf, enum bt_sdp_proto proto,
u16_t *param);
/** @brief Get profile version.
*
* Helper API extracting remote profile version number. To get it proper
* generic profile parameter needs to be selected usually listed in SDP
* Interoperability Requirements section for given profile specification.
*
* @param buf Original buffered raw record data.
* @param profile Profile family identifier the profile belongs.
* @param version On success populated by found version number.
*
* @return 0 on success, negative value if error occurred during processing.
*/
int bt_sdp_get_profile_version(const struct net_buf *buf, u16_t profile,
u16_t *version);
/** @brief Get SupportedFeatures attribute value
*
* Allows if exposed by remote retrieve SupportedFeature attribute.
*
* @param buf Buffer holding original raw record data from remote.
* @param features On success object to be populated with SupportedFeature
* mask.
*
* @return 0 on success if feature found and valid, negative in case any error
*/
int bt_sdp_get_features(const struct net_buf *buf, u16_t *features);
#ifdef __cplusplus
}
#endif
/**
* @}
*/
#endif /* __BT_SDP_H */
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