/** @file * @brief Service Discovery Protocol handling. */ /* * Copyright (c) 2016 Intel Corporation * * SPDX-License-Identifier: Apache-2.0 */ #ifndef ZEPHYR_INCLUDE_BLUETOOTH_SDP_H_ #define ZEPHYR_INCLUDE_BLUETOOTH_SDP_H_ /** * @brief Service Discovery Protocol (SDP) * @defgroup bt_sdp Service Discovery Protocol (SDP) * @ingroup bluetooth * @{ */ #include #include #ifdef __cplusplus extern "C" { #endif /* * 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 { uint8_t type; uint32_t data_size; uint32_t total_size; const void *data; }; /** @brief SDP Attribute Value. */ struct bt_sdp_attribute { uint16_t id; /* Attribute ID */ struct bt_sdp_data_elem val; /* Attribute data */ }; /** @brief SDP Service Record Value. */ struct bt_sdp_record { uint32_t handle; /* Redundant, for quick ref */ struct bt_sdp_attribute *attrs; /* Base addr of attr array */ size_t attr_count; /* Number of attributes */ uint8_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(...) ((uint8_t[]) {__VA_ARGS__}) /** @def BT_SDP_ARRAY_16 * @brief Declare an array of 16-bit elements in an attribute. */ #define BT_SDP_ARRAY_16(...) ((uint16_t[]) {__VA_ARGS__}) /** @def BT_SDP_ARRAY_32 * @brief Declare an array of 32-bit elements in an attribute. */ #define BT_SDP_ARRAY_32(...) ((uint32_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 further 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 further 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 uint8_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 = 0x0003, BT_SDP_PROTO_L2CAP = 0x0100, }; /** @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, uint16_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, uint16_t profile, uint16_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, uint16_t *features); #ifdef __cplusplus } #endif /** * @} */ #endif /* ZEPHYR_INCLUDE_BLUETOOTH_SDP_H_ */