xref: /btstack/src/bluetooth.h (revision f193890f132676f0519b3a74a92f6ba3533cf17c)

/*
 * Copyright (C) 2015 BlueKitchen GmbH
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holders nor the names of
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 * 4. Any redistribution, use, or modification is done solely for
 *    personal benefit and not for any commercial purpose or for
 *    monetary gain.
 *
 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS
 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * Please inquire about commercial licensing options at
 * [email protected]
 *
 */

/*
 * bluetooth.h
 *
 * Numbers defined or derived from the official Bluetooth specification
 */

#ifndef __BLUETOOTH_H
#define __BLUETOOTH_H

#include <stdint.h>

/**
 * @brief hci connection handle type
 */
typedef uint16_t hci_con_handle_t;

/**
 * @brief Length of a bluetooth device address.
 */
#define BD_ADDR_LEN 6

/**
 * @brief Bluetooth address
 */
typedef uint8_t bd_addr_t[BD_ADDR_LEN];

/**
 * Address types
 * @note: BTstack uses a custom addr type to refer to classic ACL and SCO devices
 */
 typedef enum {
    BD_ADDR_TYPE_LE_PUBLIC = 0,
    BD_ADDR_TYPE_LE_RANDOM = 1,
    BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC = 2,
    BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM = 3,
    BD_ADDR_TYPE_SCO       = 0xfe,
    BD_ADDR_TYPE_CLASSIC   = 0xff,
    BD_ADDR_TYPE_UNKNOWN   = 0xfe
} bd_addr_type_t;



/**
 * @brief link key
 */
#define LINK_KEY_LEN 16
#define LINK_KEY_STR_LEN (LINK_KEY_LEN*2)
typedef uint8_t link_key_t[LINK_KEY_LEN];

/**
 * @brief link key type
 */
typedef enum {
  COMBINATION_KEY = 0,  // standard pairing
  LOCAL_UNIT_KEY,     // ?
  REMOTE_UNIT_KEY,    // ?
  DEBUG_COMBINATION_KEY,  // SSP with debug
  UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192, // SSP Simple Pairing
  AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192,   // SSP Passkey, Number confirm, OOB
  CHANGED_COMBINATION_KEY,               // Link key changed using Change Connection Lnk Key
  UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256, // SSP Simpe Pairing
  AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256,   // SSP Passkey, Number confirm, OOB
} link_key_type_t;

/**
 * @brief Inquiry modes
 */
typedef enum {
  INQUIRY_MODE_STANDARD = 0,
  INQUIRY_MODE_RSSI,
  INQUIRY_MODE_RSSI_AND_EIR,
} inquiry_mode_t;

/**
 * HCI Transport
 */

/**
 * packet types - used in BTstack and over the H4 UART interface
 */
#define HCI_COMMAND_DATA_PACKET 0x01
#define HCI_ACL_DATA_PACKET     0x02
#define HCI_SCO_DATA_PACKET     0x03
#define HCI_EVENT_PACKET        0x04

// packet header sizes
#define HCI_CMD_HEADER_SIZE          3
#define HCI_ACL_HEADER_SIZE          4
#define HCI_SCO_HEADER_SIZE          3
#define HCI_EVENT_HEADER_SIZE        2

/**
 * HCI Layer
 */

//
// Error Codes rfom Bluetooth Core Specification
//

/* ENUM_START: BLUETOOTH_ERROR_CODE */
#define ERROR_CODE_SUCCESS                                 0x00
#define ERROR_CODE_UNKNOWN_HCI_COMMAND                     0x01
#define ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER           0x02
#define ERROR_CODE_HARDWARE_FAILURE                        0x03
#define ERROR_CODE_PAGE_TIMEOUT                            0x04
#define ERROR_CODE_AUTHENTICATION_FAILURE                  0x05
#define ERROR_CODE_PIN_OR_KEY_MISSING                      0x06
#define ERROR_CODE_MEMORY_CAPACITY_EXCEEDED                0x07
#define ERROR_CODE_CONNECTION_TIMEOUT                      0x08
#define ERROR_CODE_CONNECTION_LIMIT_EXCEEDED               0x09
#define ERROR_CODE_SYNCHRONOUS_CONNECTION_LIMIT_TO_A_DEVICE_EXCEEDED  0x0A
#define ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS           0x0B
#define ERROR_CODE_COMMAND_DISALLOWED                      0x0C
#define ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES 0x0D
#define ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS  0x0E
#define ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR 0x0F
#define ERROR_CODE_CONNECTION_ACCEPT_TIMEOUT_EXCEEDED      0x10
#define ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE  0x11
#define ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS          0x12
#define ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION       0x13
#define ERROR_CODE_REMOTE_DEVICE_TERMINATED_CONNECTION_DUE_TO_LOW_RESOURCES 0x14
#define ERROR_CODE_REMOTE_DEVICE_TERMINATED_CONNECTION_DUE_TO_POWER_OFF     0x15
#define ERROR_CODE_CONNECTION_TERMINATED_BY_LOCAL_HOST     0x16
#define ERROR_CODE_REPEATED_ATTEMPTS                       0x17
#define ERROR_CODE_PAIRING_NOT_ALLOWED                     0x18
#define ERROR_CODE_UNKNOWN_LMP_PDU                         0x19
#define ERROR_CODE_UNSUPPORTED_REMOTE_FEATURE_UNSUPPORTED_LMP_FEATURE 0x1A
#define ERROR_CODE_SCO_OFFSET_REJECTED                     0x1B
#define ERROR_CODE_SCO_INTERVAL_REJECTED                   0x1C
#define ERROR_CODE_SCO_AIR_MODE_REJECTED                   0x1D
#define ERROR_CODE_INVALID_LMP_PARAMETERS_INVALID_LL_PARAMETERS 0x1E
#define ERROR_CODE_UNSPECIFIED_ERROR                       0x1F
#define ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE 0x20
#define ERROR_CODE_ROLE_CHANGE_NOT_ALLOWED                 0x21
#define ERROR_CODE_LMP_RESPONSE_TIMEOUT_LL_RESPONSE_TIMEOUT 0x22
#define ERROR_CODE_LMP_ERROR_TRANSACTION_COLLISION         0x23
#define ERROR_CODE_LMP_PDU_NOT_ALLOWED                     0x24
#define ERROR_CODE_ENCRYPTION_MODE_NOT_ACCEPTABLE          0x25
#define ERROR_CODE_LINK_KEY_CANNOT_BE_CHANGED              0x26
#define ERROR_CODE_REQUESTED_QOS_NOT_SUPPORTED             0x27
#define ERROR_CODE_INSTANT_PASSED                          0x28
#define ERROR_CODE_PAIRING_WITH_UNIT_KEY_NOT_SUPPORTED     0x29
#define ERROR_CODE_DIFFERENT_TRANSACTION_COLLISION         0x2A
#define ERROR_CODE_RESERVED                                0x2B
#define ERROR_CODE_QOS_UNACCEPTABLE_PARAMETER              0x2C
#define ERROR_CODE_QOS_REJECTED                            0x2D
#define ERROR_CODE_CHANNEL_CLASSIFICATION_NOT_SUPPORTED    0x2E
#define ERROR_CODE_INSUFFICIENT_SECURITY                   0x2F
#define ERROR_CODE_PARAMETER_OUT_OF_MANDATORY_RANGE        0x30
// #define ERROR_CODE_RESERVED
#define ERROR_CODE_ROLE_SWITCH_PENDING                     0x32
// #define ERROR_CODE_RESERVED
#define ERROR_CODE_RESERVED_SLOT_VIOLATION                 0x34
#define ERROR_CODE_ROLE_SWITCH_FAILED                      0x35
#define ERROR_CODE_EXTENDED_INQUIRY_RESPONSE_TOO_LARGE     0x36
#define ERROR_CODE_SECURE_SIMPLE_PAIRING_NOT_SUPPORTED_BY_HOST 0x37
#define ERROR_CODE_HOST_BUSY_PAIRING                       0x38
#define ERROR_CODE_CONNECTION_REJECTED_DUE_TO_NO_SUITABLE_CHANNEL_FOUND 0x39
#define ERROR_CODE_CONTROLLER_BUSY                         0x3A
#define ERROR_CODE_UNACCEPTABLE_CONNECTION_PARAMETERS      0x3B
#define ERROR_CODE_DIRECTED_ADVERTISING_TIMEOUT            0x3C
#define ERROR_CODE_CONNECTION_TERMINATED_DUE_TO_MIC_FAILURE 0x3D
#define ERROR_CODE_CONNECTION_FAILED_TO_BE_ESTABLISHED     0x3E
#define ERROR_CODE_MAC_CONNECTION_FAILED                   0x3F
#define ERROR_CODE_COARSE_CLOCK_ADJUSTMENT_REJECTED_BUT_WILL_TRY_TO_ADJUST_USING_CLOCK_DRAGGING 0x40
/* ENUM_END */

// HCI roles
#define HCI_ROLE_MASTER 0
#define HCI_ROLE_SLAVE  1

// packet sizes (max payload)
#define HCI_ACL_DM1_SIZE            17
#define HCI_ACL_DH1_SIZE            27
#define HCI_ACL_2DH1_SIZE           54
#define HCI_ACL_3DH1_SIZE           83
#define HCI_ACL_DM3_SIZE           121
#define HCI_ACL_DH3_SIZE           183
#define HCI_ACL_DM5_SIZE           224
#define HCI_ACL_DH5_SIZE           339
#define HCI_ACL_2DH3_SIZE          367
#define HCI_ACL_3DH3_SIZE          552
#define HCI_ACL_2DH5_SIZE          679
#define HCI_ACL_3DH5_SIZE         1021

#define HCI_EVENT_PAYLOAD_SIZE     255
#define HCI_CMD_PAYLOAD_SIZE       255

#define LE_ADVERTISING_DATA_SIZE    31

/**
 * Default INQ Mode
 */
#define HCI_INQUIRY_LAP 0x9E8B33L  // 0x9E8B33: General/Unlimited Inquiry Access Code (GIAC)

/**
 * SSP IO Capabilities
 */
#define SSP_IO_CAPABILITY_DISPLAY_ONLY   0
#define SSP_IO_CAPABILITY_DISPLAY_YES_NO 1
#define SSP_IO_CAPABILITY_KEYBOARD_ONLY  2
#define SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT 3
#define SSP_IO_CAPABILITY_UNKNOWN 0xff


/**
 * SSP Authentication Requirements, see IO Capability Request Reply Commmand
 */

// Numeric comparison with automatic accept allowed.
#define SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_NO_BONDING 0x00

// Use IO Capabilities to deter- mine authentication procedure
#define SSP_IO_AUTHREQ_MITM_PROTECTION_REQUIRED_NO_BONDING 0x01

// Numeric compar- ison with automatic accept allowed.
#define SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING 0x02

// Use IO Capabilities to determine authentication procedure
#define SSP_IO_AUTHREQ_MITM_PROTECTION_REQUIRED_DEDICATED_BONDING 0x03

// Numeric Compari- son with automatic accept allowed.
#define SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING 0x04

// Use IO capabilities to determine authentication procedure.
#define SSP_IO_AUTHREQ_MITM_PROTECTION_REQUIRED_GENERAL_BONDING 0x05


// OGFs
#define OGF_LINK_CONTROL          0x01
#define OGF_LINK_POLICY           0x02
#define OGF_CONTROLLER_BASEBAND   0x03
#define OGF_INFORMATIONAL_PARAMETERS 0x04
#define OGF_STATUS_PARAMETERS     0x05
#define OGF_TESTING               0x06
#define OGF_LE_CONTROLLER 0x08
#define OGF_VENDOR  0x3f


// Events from host controller to host

/**
 * @format 1
 * @param status
 */
#define HCI_EVENT_INQUIRY_COMPLETE                         0x01

/**
 * @format 1B11132
 * @param num_responses
 * @param bd_addr
 * @param page_scan_repetition_mode
 * @param reserved1
 * @param reserved2
 * @param class_of_device
 * @param clock_offset
 */
#define HCI_EVENT_INQUIRY_RESULT                           0x02

/**
 * @format 12B11
 * @param status
 * @param connection_handle
 * @param bd_addr
 * @param link_type
 * @param encryption_enabled
 */
#define HCI_EVENT_CONNECTION_COMPLETE                      0x03
/**
 * @format B31
 * @param bd_addr
 * @param class_of_device
 * @param link_type
 */
#define HCI_EVENT_CONNECTION_REQUEST                       0x04
/**
 * @format 121
 * @param status
 * @param connection_handle
 * @param reason
 */
#define HCI_EVENT_DISCONNECTION_COMPLETE                   0x05
/**
 * @format 12
 * @param status
 * @param connection_handle
 */
#define HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT            0x06
/**
 * @format 1BN
 * @param status
 * @param bd_addr
 * @param remote_name
 */
#define HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE             0x07
/**
 * @format 121
 * @param status
 * @param connection_handle
 * @param encryption_enabled
 */
#define HCI_EVENT_ENCRYPTION_CHANGE                        0x08
/**
 * @format 12
 * @param status
 * @param connection_handle
 */
#define HCI_EVENT_CHANGE_CONNECTION_LINK_KEY_COMPLETE      0x09
/**
 * @format 121
 * @param status
 * @param connection_handle
 * @param key_flag
 */
#define HCI_EVENT_MASTER_LINK_KEY_COMPLETE                 0x0A

#define HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE  0x0B

#define HCI_EVENT_READ_REMOTE_VERSION_INFORMATION_COMPLETE 0x0C

#define HCI_EVENT_QOS_SETUP_COMPLETE                       0x0D

/**
 * @format 12R
 * @param num_hci_command_packets
 * @param command_opcode
 * @param return_parameters
 */
#define HCI_EVENT_COMMAND_COMPLETE                         0x0E
/**
 * @format 112
 * @param status
 * @param num_hci_command_packets
 * @param command_opcode
 */
#define HCI_EVENT_COMMAND_STATUS                           0x0F

/**
 * @format 1
 * @param hardware_code
 */
#define HCI_EVENT_HARDWARE_ERROR                           0x10

#define HCI_EVENT_FLUSH_OCCURRED                           0x11

/**
 * @format 1B1
 * @param status
 * @param bd_addr
 * @param role
 */
#define HCI_EVENT_ROLE_CHANGE                              0x12

// TODO: number_of_handles 1, connection_handle[H*i], hc_num_of_completed_packets[2*i]
#define HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS              0x13

/**
 * @format 1H12
 * @param status
 * @param handle
 * @param mode
 * @param interval
 */
#define HCI_EVENT_MODE_CHANGE_EVENT                        0x14

// TODO: num_keys, bd_addr[B*i], link_key[16 octets * i]
#define HCI_EVENT_RETURN_LINK_KEYS                         0x15

/**
 * @format B
 * @param bd_addr
 */
#define HCI_EVENT_PIN_CODE_REQUEST                         0x16

/**
 * @format B
 * @param bd_addr
 */
#define HCI_EVENT_LINK_KEY_REQUEST                         0x17

// TODO: bd_addr B, link_key 16octets, key_type 1
#define HCI_EVENT_LINK_KEY_NOTIFICATION                    0x18

/**
 * @format 1
 * @param link_type
 */
#define HCI_EVENT_DATA_BUFFER_OVERFLOW                     0x1A

/**
 * @format H1
 * @param handle
 * @param lmp_max_slots
 */
#define HCI_EVENT_MAX_SLOTS_CHANGED                        0x1B

/**
 * @format 1H2
 * @param status
 * @param handle
 * @param clock_offset
 */
#define HCI_EVENT_READ_CLOCK_OFFSET_COMPLETE               0x1C

/**
 * @format 1H2
 * @param status
 * @param handle
 * @param packet_types
 * @pnote packet_type is in plural to avoid clash with Java binding Packet.getPacketType()
 */
#define HCI_EVENT_CONNECTION_PACKET_TYPE_CHANGED           0x1D

/**
 * @format 1B11321
 * @param num_responses
 * @param bd_addr
 * @param page_scan_repetition_mode
 * @param reserved
 * @param class_of_device
 * @param clock_offset
 * @param rssi
 */
#define HCI_EVENT_INQUIRY_RESULT_WITH_RSSI                 0x22

/**
 * @format 1HB111221
 * @param status
 * @param handle
 * @param bd_addr
 * @param link_type
 * @param transmission_interval
 * @param retransmission_interval
 * @param rx_packet_length
 * @param tx_packet_length
 * @param air_mode
 */
#define HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE          0x2C

// TODO: serialize extended_inquiry_response and provide parser
/**
 * @format 1B11321
 * @param num_responses
 * @param bd_addr
 * @param page_scan_repetition_mode
 * @param reserved
 * @param class_of_device
 * @param clock_offset
 * @param rssi
 */
#define HCI_EVENT_EXTENDED_INQUIRY_RESPONSE                0x2F

 /**
  * @format 1H
  * @param status
  * @param handle
  */
#define HCI_EVENT_ENCRYPTION_KEY_REFRESH_COMPLETE          0x30

#define HCI_EVENT_IO_CAPABILITY_REQUEST                    0x31
#define HCI_EVENT_IO_CAPABILITY_RESPONSE                   0x32

/**
 * @format B4
 * @param bd_addr
 * @param numeric_value
 */
#define HCI_EVENT_USER_CONFIRMATION_REQUEST                0x33

/**
 * @format B
 * @param bd_addr
 */
#define HCI_EVENT_USER_PASSKEY_REQUEST                     0x34

/**
 * @format B
 * @param bd_addr
 */
#define HCI_EVENT_REMOTE_OOB_DATA_REQUEST                  0x35

/**
 * @format 1B
 * @param status
 * @param bd_addr
 */
#define HCI_EVENT_SIMPLE_PAIRING_COMPLETE                  0x36

#define HCI_EVENT_LE_META                                  0x3E

// last used HCI_EVENT in 2.1 is 0x3d
// last used HCI_EVENT in 4.1 is 0x57

#define HCI_EVENT_VENDOR_SPECIFIC                          0xFF

/**
 * @format 11H11B2221
 * @param subevent_code
 * @param status
 * @param connection_handle
 * @param role
 * @param peer_address_type
 * @param peer_address
 * @param conn_interval
 * @param conn_latency
 * @param supervision_timeout
 * @param master_clock_accuracy
 */
#define HCI_SUBEVENT_LE_CONNECTION_COMPLETE                0x01

// array of advertisements, not handled by event accessor generator
#define HCI_SUBEVENT_LE_ADVERTISING_REPORT                 0x02

/**
 * @format 11H222
 * @param subevent_code
 * @param status
 * @param connection_handle
 * @param conn_interval
 * @param conn_latency
 * @param supervision_timeout
 */
 #define HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE         0x03

/**
 * @format 1HD2
 * @param subevent_code
 * @param connection_handle
 * @param random_number
 * @param encryption_diversifier
 */
#define HCI_SUBEVENT_LE_READ_REMOTE_USED_FEATURES_COMPLETE 0x04

/**
 * @format 1HD2
 * @param subevent_code
 * @param connection_handle
 * @param random_number
 * @param encryption_diversifier
 */
#define HCI_SUBEVENT_LE_LONG_TERM_KEY_REQUEST              0x05

/**
 * @format 1H2222
 * @param subevent_code
 * @param connection_handle
 * @param interval_min
 * @param interval_max
 * @param latency
 * @param timeout
 */
#define HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST 0x06

/**
 * @format 1H2222
 * @param subevent_code
 * @param connection_handle
 * @param max_tx_octets
 * @param max_tx_time
 * @param max_rx_octets
 * @param max_rx_time
 */
#define HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE 0x07

/**
 * @format 11QQ
 * @param subevent_code
 * @param status
 * @param dhkey_x x coordinate of P256 public key
 * @param dhkey_y y coordinate of P256 public key
 */
#define HCI_SUBEVENT_LE_READ_LOCAL_P256_PUBLIC_KEY_COMPLETE 0x08
 /**
 * @format 11QQ
 * @param subevent_code
 * @param status
 * @param dhkey_x x coordinate of Diffie-Hellman key
 * @param dhkey_y y coordinate of Diffie-Hellman key
 */
#define HCI_SUBEVENT_LE_GENERATE_DHKEY_COMPLETE            0x09

/**
 * @format 11H11BBB2221
 * @param subevent_code
 * @param status
 * @param connection_handle
 * @param role
 * @param peer_address_type
 * @param perr_addresss
 * @param local_resolvable_private_addres
 * @param peer_resolvable_private_addres
 * @param conn_interval
 * @param conn_latency
 * @param supervision_timeout
 * @param master_clock_accuracy
 */
#define HCI_SUBEVENT_LE_ENHANCED_CONNECTION_COMPLETE       0x0A

// array of advertisements, not handled by event accessor generator
#define HCI_SUBEVENT_LE_DIRECT_ADVERTISING_REPORT          0x0B

/**
 * L2CAP Layer
 */

#define L2CAP_HEADER_SIZE 4

#define L2CAP_SIG_ID_INVALID 0

// size of HCI ACL + L2CAP Header for regular data packets (8)
#define COMPLETE_L2CAP_HEADER (HCI_ACL_HEADER_SIZE + L2CAP_HEADER_SIZE)

// minimum signaling MTU
#define L2CAP_MINIMAL_MTU 48
#define L2CAP_DEFAULT_MTU 672

// Minimum/default MTU
#define L2CAP_LE_DEFAULT_MTU  23

// L2CAP Fixed Channel IDs
#define L2CAP_CID_SIGNALING                 0x0001
#define L2CAP_CID_CONNECTIONLESS_CHANNEL    0x0002
#define L2CAP_CID_ATTRIBUTE_PROTOCOL        0x0004
#define L2CAP_CID_SIGNALING_LE              0x0005
#define L2CAP_CID_SECURITY_MANAGER_PROTOCOL 0x0006

// L2CAP Configuration Result Codes
#define L2CAP_CONF_RESULT_UNKNOWN_OPTIONS   0x0003

// L2CAP Reject Result Codes
#define L2CAP_REJ_CMD_UNKNOWN               0x0000

// Response Timeout eXpired
#define L2CAP_RTX_TIMEOUT_MS   10000

// Extended Response Timeout eXpired
#define L2CAP_ERTX_TIMEOUT_MS 120000

//
// Fixed PSM numbers from https://www.bluetooth.com/specifications/assigned-numbers/logical-link-control
//
// @TODO: replace with BLUETOOTH_PROTOCOL_xxx in rest of code
#define PSM_SDP           BLUETOOTH_PROTOCOL_SDP
#define PSM_RFCOMM        BLUETOOTH_PROTOCOL_RFCOMM
#define PSM_BNEP          BLUETOOTH_PROTOCOL_BNEP
// @TODO: scrape PSMs Bluetooth SIG site and put in bluetooth_psm.h or bluetooth_l2cap.h
#define PSM_HID_CONTROL   0x11
#define PSM_HID_INTERRUPT 0x13
#define PSM_IPSP          0x23

/**
 * SDP Protocol
 */

 // PDU Types
typedef enum {
    SDP_Invalid = 0,
    SDP_ErrorResponse = 1,
    SDP_ServiceSearchRequest,
    SDP_ServiceSearchResponse,
    SDP_ServiceAttributeRequest,
    SDP_ServiceAttributeResponse,
    SDP_ServiceSearchAttributeRequest,
    SDP_ServiceSearchAttributeResponse
} SDP_PDU_ID_t;

/* Please use assigned numbers from bluetooth_sdp.h instead for thsese ...*/

// UNIVERSAL ATTRIBUTE DEFINITIONS
#define SDP_ServiceRecordHandle               BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE
#define SDP_ServiceClassIDList                BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST
#define SDP_ServiceRecordState                BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_STATE
#define SDP_ServiceID                         BLUETOOTH_ATTRIBUTE_SERVICE_ID
#define SDP_ProtocolDescriptorList            BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST
#define SDP_BrowseGroupList                   BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST
#define SDP_LanguageBaseAttributeIDList       BLUETOOTH_ATTRIBUTE_LANGUAGE_BASE_ATTRIBUTE_ID_LIST
#define SDP_ServiceInfoTimeToLive             BLUETOOTH_ATTRIBUTE_SERVICE_INFO_TIME_TO_LIVE
#define SDP_ServiceAvailability               BLUETOOTH_ATTRIBUTE_SERVICE_AVAILABILITY
#define SDP_BluetoothProfileDescriptorList    BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST
#define SDP_DocumentationURL                  BLUETOOTH_ATTRIBUTE_DOCUMENTATION_URL
#define SDP_ClientExecutableURL               BLUETOOTH_ATTRIBUTE_CLIENT_EXECUTABLE_URL
#define SDP_IconURL                           BLUETOOTH_ATTRIBUTE_ICON_URL
#define SDP_AdditionalProtocolDescriptorList  BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS
#define SDP_SupportedFormatsList              BLUETOOTH_ATTRIBUTE_SUPPORTED_FORMATS_LIST

// SERVICE CLASSES
#define SDP_OBEXObjectPush                    BLUETOOTH_SERVICE_CLASS_OBEX_OBJECT_PUSH
#define SDP_OBEXFileTransfer                  BLUETOOTH_SERVICE_CLASS_OBEX_FILE_TRANSFER
#define SDP_PublicBrowseGroup                 BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT
#define SDP_HSP                               BLUETOOTH_SERVICE_CLASS_HEADSET
#define SDP_Headset_AG                        BLUETOOTH_SERVICE_CLASS_HEADSET_AUDIO_GATEWAY_AG
#define SDP_PANU                              BLUETOOTH_SERVICE_CLASS_PANU
#define SDP_NAP                               BLUETOOTH_SERVICE_CLASS_NAP
#define SDP_GN                                BLUETOOTH_SERVICE_CLASS_GN
#define SDP_Handsfree                         BLUETOOTH_SERVICE_CLASS_HANDSFREE
#define SDP_HandsfreeAudioGateway             BLUETOOTH_SERVICE_CLASS_HANDSFREE_AUDIO_GATEWAY
#define SDP_Headset_HS                        BLUETOOTH_SERVICE_CLASS_HEADSET_HS
#define SDP_GenericAudio                      BLUETOOTH_SERVICE_CLASS_GENERIC_AUDIO

// PROTOCOLS
#define SDP_SDPProtocol                       BLUETOOTH_PROTOCOL_SDP
#define SDP_UDPProtocol                       BLUETOOTH_PROTOCOL_UDP
#define SDP_RFCOMMProtocol                    BLUETOOTH_PROTOCOL_RFCOMM
#define SDP_OBEXProtocol                      BLUETOOTH_PROTOCOL_OBEX
#define SDP_L2CAPProtocol                     BLUETOOTH_PROTOCOL_L2CAP
#define SDP_BNEPProtocol                      BLUETOOTH_PROTOCOL_BNEP
#define SDP_AVDTPProtocol                     BLUETOOTH_PROTOCOL_AVDTP

/** .. until here ..*/

// OFFSETS FOR LOCALIZED ATTRIBUTES - SDP_LanguageBaseAttributeIDList
#define SDP_Offest_ServiceName      0x0000
#define SDP_Offest_ServiceDescription 0x0001
#define SDP_Offest_ProviderName     0x0002

// Device Vendor ID Sources
#define DEVICE_ID_VENDOR_ID_SOURCE_BLUETOOTH 0x0001
#define DEVICE_ID_VENDOR_ID_SOURCE_USB       0x0002

// OBEX
#define SDP_vCard_2_1       0x01
#define SDP_vCard_3_0       0x02
#define SDP_vCal_1_0        0x03
#define SDP_iCal_2_0        0x04
#define SDP_vNote           0x05
#define SDP_vMessage        0x06
#define SDP_OBEXFileTypeAny 0xFF

/**
 * RFCOMM Protocol
 */

// Control field values      bit no.       1 2 3 4 PF 6 7 8
#define BT_RFCOMM_SABM       0x3F       // 1 1 1 1  1 1 0 0
#define BT_RFCOMM_UA         0x73       // 1 1 0 0  1 1 1 0
#define BT_RFCOMM_DM         0x0F       // 1 1 1 1  0 0 0 0
#define BT_RFCOMM_DM_PF      0x1F       // 1 1 1 1  1 0 0 0
#define BT_RFCOMM_DISC       0x53       // 1 1 0 0  1 0 1 0
#define BT_RFCOMM_UIH        0xEF       // 1 1 1 1  0 1 1 1
#define BT_RFCOMM_UIH_PF     0xFF       // 1 1 1 1  0 1 1 1

// Multiplexer message types
#define BT_RFCOMM_CLD_CMD    0xC3
#define BT_RFCOMM_FCON_CMD   0xA3
#define BT_RFCOMM_FCON_RSP   0xA1
#define BT_RFCOMM_FCOFF_CMD  0x63
#define BT_RFCOMM_FCOFF_RSP  0x61
#define BT_RFCOMM_MSC_CMD    0xE3
#define BT_RFCOMM_MSC_RSP    0xE1
#define BT_RFCOMM_NSC_RSP    0x11
#define BT_RFCOMM_PN_CMD     0x83
#define BT_RFCOMM_PN_RSP     0x81
#define BT_RFCOMM_RLS_CMD    0x53
#define BT_RFCOMM_RLS_RSP    0x51
#define BT_RFCOMM_RPN_CMD    0x93
#define BT_RFCOMM_RPN_RSP    0x91
#define BT_RFCOMM_TEST_CMD   0x23
#define BT_RFCOMM_TEST_RSP   0x21

// Line Status
#define LINE_STATUS_NO_ERROR       0x00
#define LINE_STATUS_OVERRUN_ERROR  0x03
#define LINE_STATUS_PARITY_ERORR   0x05
#define LINE_STATUS_FRAMING_ERROR  0x09

// Modem Status Flags
#define MODEM_STATUS_FC   0x02
#define MODEM_STATUS_RTC  0x04
#define MODEM_STATUS_RTR  0x08
#define MODEM_STATUS_IC   0x40
#define MODEM_STATUS_DV   0x80

typedef enum rpn_baud {
    RPN_BAUD_2400 = 0,
    RPN_BAUD_4800,
    RPN_BAUD_7200,
    RPN_BAUD_9600,
    RPN_BAUD_19200,
    RPN_BAUD_38400,
    RPN_BAUD_57600,
    RPN_BAUD_115200,
    RPN_BAUD_230400
} rpn_baud_t;

typedef enum rpn_data_bits {
    RPN_DATA_BITS_5 = 0,
    RPN_DATA_BITS_6 = 0,
    RPN_DATA_BITS_7 = 0,
    RPN_DATA_BITS_8 = 0
} rpn_data_bits_t;

typedef enum rpn_stop_bits {
    RPN_STOP_BITS_1_0 = 0,
    RPN_STOP_BITS_1_5
} rpn_stop_bits_t;

typedef enum rpn_parity {
    RPN_PARITY_NONE  = 0,
    RPN_PARITY_ODD   = 1,
    RPN_PARITY_EVEN  = 3,
    RPN_PARITY_MARK  = 5,
    RPN_PARITY_SPACE = 7,
} rpn_parity_t;

typedef enum rpn_flow_control {
    RPN_FLOW_CONTROL_XONXOFF_ON_INPUT  = 1 << 0,
    RPN_FLOW_CONTROL_XONXOFF_ON_OUTPUT = 1 << 1,
    RPN_FLOW_CONTROL_RTR_ON_INPUT  = 1 << 2,
    RPN_FLOW_CONTROL_RTR_ON_OUTPUT = 1 << 3,
    RPN_FLOW_CONTROL_RTC_ON_INPUT  = 1 << 4,
    RPN_FLOW_CONTROL_RTC_ON_OUTPUT = 1 << 5,
} rpn_flow_control_t;

#define RPN_PARAM_MASK_0_BAUD             0x01
#define RPN_PARAM_MASK_0_DATA_BITS        0x02
#define RPN_PARAM_MASK_0_STOP_BITS        0x04
#define RPN_PARAM_MASK_0_PARITY           0x08
#define RPN_PARAM_MASK_0_PARITY_TYPE      0x10
#define RPN_PARAM_MASK_0_XON_CHAR         0x20
#define RPN_PARAM_MASK_0_XOFF_CHAR        0x40
#define RPN_PARAM_MASK_0_RESERVED         0x80

// @note: values are identical to rpn_flow_control_t
#define RPN_PARAM_MASK_1_XONOFF_ON_INPUT  0x01
#define RPN_PARAM_MASK_1_XONOFF_ON_OUTPUT 0x02
#define RPN_PARAM_MASK_1_RTR_ON_INPUT     0x04
#define RPN_PARAM_MASK_1_RTR_ON_OUTPUT    0x08
#define RPN_PARAM_MASK_1_RTC_ON_INPUT     0x10
#define RPN_PARAM_MASK_1_RTC_ON_OUTPUT    0x20
#define RPN_PARAM_MASK_1_RESERVED_0       0x40
#define RPN_PARAM_MASK_1_RESERVED_1       0x80

/**
 * BNEP Protocol
 */

#ifndef ETHER_ADDR_LEN
#define ETHER_ADDR_LEN 6
#endif

#ifndef ETHERTYPE_VLAN
#define ETHERTYPE_VLAN                                  0x8100 /* IEEE 802.1Q VLAN tag */
#endif

#define BNEP_MTU_MIN                                    1691

#define BNEP_EXT_FLAG                                   0x80
#define BNEP_TYPE_MASK                                  0x7F
#define BNEP_TYPE(header)                               ((header) & BNEP_TYPE_MASK)
#define BNEP_HEADER_HAS_EXT(x)                          (((x) & BNEP_EXT_FLAG) == BNEP_EXT_FLAG)

/* BNEP packet types */
#define BNEP_PKT_TYPE_GENERAL_ETHERNET                  0x00
#define BNEP_PKT_TYPE_CONTROL                           0x01
#define BNEP_PKT_TYPE_COMPRESSED_ETHERNET               0x02
#define BNEP_PKT_TYPE_COMPRESSED_ETHERNET_SOURCE_ONLY   0x03
#define BNEP_PKT_TYPE_COMPRESSED_ETHERNET_DEST_ONLY     0x04

/* BNEP control types */
#define BNEP_CONTROL_TYPE_COMMAND_NOT_UNDERSTOOD        0x00
#define BNEP_CONTROL_TYPE_SETUP_CONNECTION_REQUEST      0x01
#define BNEP_CONTROL_TYPE_SETUP_CONNECTION_RESPONSE     0x02
#define BNEP_CONTROL_TYPE_FILTER_NET_TYPE_SET           0x03
#define BNEP_CONTROL_TYPE_FILTER_NET_TYPE_RESPONSE      0x04
#define BNEP_CONTROL_TYPE_FILTER_MULTI_ADDR_SET         0x05
#define BNEP_CONTROL_TYPE_FILTER_MULTI_ADDR_RESPONSE    0x06

/* BNEP extension header types */
#define BNEP_EXT_HEADER_TYPE_EXTENSION_CONTROL          0x00

/* BNEP setup response codes */
#define BNEP_RESP_SETUP_SUCCESS                         0x0000
#define BNEP_RESP_SETUP_INVALID_DEST_UUID               0x0001
#define BNEP_RESP_SETUP_INVALID_SOURCE_UUID             0x0002
#define BNEP_RESP_SETUP_INVALID_SERVICE_UUID_SIZE       0x0003
#define BNEP_RESP_SETUP_CONNECTION_NOT_ALLOWED          0x0004

/* BNEP filter response codes */
#define BNEP_RESP_FILTER_SUCCESS                        0x0000
#define BNEP_RESP_FILTER_UNSUPPORTED_REQUEST            0x0001
#define BNEP_RESP_FILTER_ERR_INVALID_RANGE              0x0002
#define BNEP_RESP_FILTER_ERR_TOO_MANY_FILTERS           0x0003
#define BNEP_RESP_FILTER_ERR_SECURITY                   0x0004

/**
 * PAN Profile
 */

typedef enum {
    BNEP_SECURITY_NONE = 0x0000,
    BNEP_SECURITY_SERVICE_LEVEL_ENFORCED,
    BNEP_SECURITY_802_1X
} security_description_t;

typedef enum {
    PAN_NET_ACCESS_TYPE_PSTN = 0x0000,
    PAN_NET_ACCESS_TYPE_ISDN,
    PAN_NET_ACCESS_TYPE_DSL,
    PAN_NET_ACCESS_TYPE_CABLE_MODEM,
    PAN_NET_ACCESS_TYPE_10MB_ETHERNET,
    PAN_NET_ACCESS_TYPE_100MB_ETHERNET,
    PAN_NET_ACCESS_TYPE_4MB_TOKEN_RING,
    PAN_NET_ACCESS_TYPE_16MB_TOKEN_RING,
    PAN_NET_ACCESS_TYPE_100MB_TOKEN_RING,
    PAN_NET_ACCESS_TYPE_FDDI,
    PAN_NET_ACCESS_TYPE_GSM,
    PAN_NET_ACCESS_TYPE_CDMA,
    PAN_NET_ACCESS_TYPE_GPRS,
    PAN_NET_ACCESS_TYPE_3G,
    PAN_NET_ACCESS_TYPE_CELULAR,
    PAN_NET_ACCESS_TYPE_OTHER = 0xFFFE,
    PAN_NET_ACCESS_TYPE_NONE
} net_access_type_t;

/**
 * ATT
 */

// Minimum/default MTU
#define ATT_DEFAULT_MTU               23

// MARK: Attribute PDU Opcodes
#define ATT_ERROR_RESPONSE              0x01

#define ATT_EXCHANGE_MTU_REQUEST        0x02
#define ATT_EXCHANGE_MTU_RESPONSE       0x03

#define ATT_FIND_INFORMATION_REQUEST    0x04
#define ATT_FIND_INFORMATION_REPLY      0x05
#define ATT_FIND_BY_TYPE_VALUE_REQUEST  0x06
#define ATT_FIND_BY_TYPE_VALUE_RESPONSE 0x07

#define ATT_READ_BY_TYPE_REQUEST        0x08
#define ATT_READ_BY_TYPE_RESPONSE       0x09
#define ATT_READ_REQUEST                0x0a
#define ATT_READ_RESPONSE               0x0b
#define ATT_READ_BLOB_REQUEST           0x0c
#define ATT_READ_BLOB_RESPONSE          0x0d
#define ATT_READ_MULTIPLE_REQUEST       0x0e
#define ATT_READ_MULTIPLE_RESPONSE      0x0f
#define ATT_READ_BY_GROUP_TYPE_REQUEST  0x10
#define ATT_READ_BY_GROUP_TYPE_RESPONSE 0x11

#define ATT_WRITE_REQUEST               0x12
#define ATT_WRITE_RESPONSE              0x13

#define ATT_PREPARE_WRITE_REQUEST       0x16
#define ATT_PREPARE_WRITE_RESPONSE      0x17
#define ATT_EXECUTE_WRITE_REQUEST       0x18
#define ATT_EXECUTE_WRITE_RESPONSE      0x19

#define ATT_HANDLE_VALUE_NOTIFICATION   0x1b
#define ATT_HANDLE_VALUE_INDICATION     0x1d
#define ATT_HANDLE_VALUE_CONFIRMATION   0x1e


#define ATT_WRITE_COMMAND                0x52
#define ATT_SIGNED_WRITE_COMMAND         0xD2

// MARK: ATT Error Codes
#define ATT_ERROR_INVALID_HANDLE                   0x01
#define ATT_ERROR_READ_NOT_PERMITTED               0x02
#define ATT_ERROR_WRITE_NOT_PERMITTED              0x03
#define ATT_ERROR_INVALID_PDU                      0x04
#define ATT_ERROR_INSUFFICIENT_AUTHENTICATION      0x05
#define ATT_ERROR_REQUEST_NOT_SUPPORTED            0x06
#define ATT_ERROR_INVALID_OFFSET                   0x07
#define ATT_ERROR_INSUFFICIENT_AUTHORIZATION       0x08
#define ATT_ERROR_PREPARE_QUEUE_FULL               0x09
#define ATT_ERROR_ATTRIBUTE_NOT_FOUND              0x0a
#define ATT_ERROR_ATTRIBUTE_NOT_LONG               0x0b
#define ATT_ERROR_INSUFFICIENT_ENCRYPTION_KEY_SIZE 0x0c
#define ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH   0x0d
#define ATT_ERROR_UNLIKELY_ERROR                   0x0e
#define ATT_ERROR_INSUFFICIENT_ENCRYPTION          0x0f
#define ATT_ERROR_UNSUPPORTED_GROUP_TYPE           0x10
#define ATT_ERROR_INSUFFICIENT_RESOURCES           0x11

// MARK: Attribute Property Flags
#define ATT_PROPERTY_BROADCAST           0x01
#define ATT_PROPERTY_READ                0x02
#define ATT_PROPERTY_WRITE_WITHOUT_RESPONSE 0x04
#define ATT_PROPERTY_WRITE               0x08
#define ATT_PROPERTY_NOTIFY              0x10
#define ATT_PROPERTY_INDICATE            0x20
#define ATT_PROPERTY_AUTHENTICATED_SIGNED_WRITE 0x40
#define ATT_PROPERTY_EXTENDED_PROPERTIES 0x80

// MARK: Attribute Property Flag, BTstack extension
// value is asked from client
#define ATT_PROPERTY_DYNAMIC             0x100
// 128 bit UUID used
#define ATT_PROPERTY_UUID128             0x200
// Authentication required
#define ATT_PROPERTY_AUTHENTICATION_REQUIRED 0x400
// Authorization from user required
#define ATT_PROPERTY_AUTHORIZATION_REQUIRED  0x800
// Encryption key size stored in upper 4 bits, 0 == no encryption, encryption key size - 1 otherwise

// ATT Transaction Timeout of 30 seconds for Command/Response or Incidationc/Confirmation
#define ATT_TRANSACTION_TIMEOUT_MS     30000

#define ATT_TRANSACTION_MODE_NONE      0x0
#define ATT_TRANSACTION_MODE_ACTIVE    0x1
#define ATT_TRANSACTION_MODE_EXECUTE   0x2
#define ATT_TRANSACTION_MODE_CANCEL    0x3

// MARK: GATT UUIDs
#define GATT_PRIMARY_SERVICE_UUID                   0x2800
#define GATT_SECONDARY_SERVICE_UUID                 0x2801
#define GATT_INCLUDE_SERVICE_UUID                   0x2802
#define GATT_CHARACTERISTICS_UUID                   0x2803
#define GATT_CHARACTERISTIC_EXTENDED_PROPERTIES     0x2900
#define GATT_CHARACTERISTIC_USER_DESCRIPTION        0x2901
#define GATT_CLIENT_CHARACTERISTICS_CONFIGURATION   0x2902
#define GATT_SERVER_CHARACTERISTICS_CONFIGURATION   0x2903
#define GATT_CHARACTERISTIC_PRESENTATION_FORMAT     0x2904
#define GATT_CHARACTERISTIC_AGGREGATE_FORMAT        0x2905

#define GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NONE          0
#define GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION  1
#define GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION    2

// GAP Service and Characteristics
#define GAP_SERVICE_UUID               0x1800
#define GAP_DEVICE_NAME_UUID           0x2a00
#define GAP_APPEARANCE_UUID            0x2a01
#define GAP_PERIPHERAL_PRIVACY_FLAG    0x2a02
#define GAP_RECONNECTION_ADDRESS_UUID  0x2a03
#define GAP_PERIPHERAL_PREFERRED_CONNECTION_PARAMETERS_UUID 0x2a04
#define GAP_SERVICE_CHANGED            0x2a05

/**
 * SM - LE Security Manager
 */
// Bluetooth Spec definitions
typedef enum {
    SM_CODE_PAIRING_REQUEST = 0X01,
    SM_CODE_PAIRING_RESPONSE,
    SM_CODE_PAIRING_CONFIRM,
    SM_CODE_PAIRING_RANDOM,
    SM_CODE_PAIRING_FAILED,
    SM_CODE_ENCRYPTION_INFORMATION,
    SM_CODE_MASTER_IDENTIFICATION,
    SM_CODE_IDENTITY_INFORMATION,
    SM_CODE_IDENTITY_ADDRESS_INFORMATION,
    SM_CODE_SIGNING_INFORMATION,
    SM_CODE_SECURITY_REQUEST,
    SM_CODE_PAIRING_PUBLIC_KEY,
    SM_CODE_PAIRING_DHKEY_CHECK,
    SM_CODE_KEYPRESS_NOTIFICATION,
} SECURITY_MANAGER_COMMANDS;

// IO Capability Values
typedef enum {
    IO_CAPABILITY_DISPLAY_ONLY = 0,
    IO_CAPABILITY_DISPLAY_YES_NO,
    IO_CAPABILITY_KEYBOARD_ONLY,
    IO_CAPABILITY_NO_INPUT_NO_OUTPUT,
    IO_CAPABILITY_KEYBOARD_DISPLAY, // not used by secure simple pairing
} io_capability_t;

// Authentication requirement flags
#define SM_AUTHREQ_NO_BONDING        0x00
#define SM_AUTHREQ_BONDING           0x01
#define SM_AUTHREQ_MITM_PROTECTION   0x04
#define SM_AUTHREQ_SECURE_CONNECTION 0x08
#define SM_AUTHREQ_KEYPRESS          0x10

// Key distribution flags used by spec
#define SM_KEYDIST_ENC_KEY  0x01
#define SM_KEYDIST_ID_KEY   0x02
#define SM_KEYDIST_SIGN     0x04
#define SM_KEYDIST_LINK_KEY 0x08

// Key distribution flags used internally
#define SM_KEYDIST_FLAG_ENCRYPTION_INFORMATION       0x01
#define SM_KEYDIST_FLAG_MASTER_IDENTIFICATION        0x02
#define SM_KEYDIST_FLAG_IDENTITY_INFORMATION         0x04
#define SM_KEYDIST_FLAG_IDENTITY_ADDRESS_INFORMATION 0x08
#define SM_KEYDIST_FLAG_SIGNING_IDENTIFICATION       0x10

// STK Generation Methods
#define SM_STK_GENERATION_METHOD_JUST_WORKS          0x01
#define SM_STK_GENERATION_METHOD_OOB                 0x02
#define SM_STK_GENERATION_METHOD_PASSKEY             0x04
#define SM_STK_GENERATION_METHOD_NUMERIC_COMPARISON  0x08

// Pairing Failed Reasons
#define SM_REASON_RESERVED                     0x00
#define SM_REASON_PASSKEYT_ENTRY_FAILED        0x01
#define SM_REASON_OOB_NOT_AVAILABLE            0x02
#define SM_REASON_AUTHENTHICATION_REQUIREMENTS 0x03
#define SM_REASON_CONFIRM_VALUE_FAILED         0x04
#define SM_REASON_PAIRING_NOT_SUPPORTED        0x05
#define SM_REASON_ENCRYPTION_KEY_SIZE          0x06
#define SM_REASON_COMMAND_NOT_SUPPORTED        0x07
#define SM_REASON_UNSPECIFIED_REASON           0x08
#define SM_REASON_REPEATED_ATTEMPTS            0x09
#define SM_REASON_INVALID_PARAMETERS           0x0a
#define SM_REASON_DHKEY_CHECK_FAILED           0x0b
#define SM_REASON_NUMERIC_COMPARISON_FAILED    0x0c

// also, invalid parameters
// and reserved

// Keypress Notifications
#define SM_KEYPRESS_PASSKEY_ENTRY_STARTED      0x00
#define SM_KEYPRESS_PASSKEY_DIGIT_ENTERED      0x01
#define SM_KEYPRESS_PASSKEY_DIGIT_ERASED       0x02
#define SM_KEYPRESS_PASSKEY_CLEARED            0x03
#define SM_KEYPRESS_PASSKEY_ENTRY_COMPLETED    0x04


#endif