715 lines
30 KiB
C
715 lines
30 KiB
C
/*
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LUFA Library
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Copyright (C) Dean Camera, 2010.
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dean [at] fourwalledcubicle [dot] com
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www.fourwalledcubicle.com
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*/
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/*
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Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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Permission to use, copy, modify, distribute, and sell this
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software and its documentation for any purpose is hereby granted
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without fee, provided that the above copyright notice appear in
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all copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the name of the author not be used in
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advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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The author disclaim all warranties with regard to this
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software, including all implied warranties of merchantability
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and fitness. In no event shall the author be liable for any
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special, indirect or consequential damages or any damages
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whatsoever resulting from loss of use, data or profits, whether
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in an action of contract, negligence or other tortious action,
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arising out of or in connection with the use or performance of
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this software.
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*/
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/** \file
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*
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* SDP layer module. This module implements a simple Service Discovery
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* Protocol server, which can broadcast the device's supported services
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* to other Bluetooth devices upon request, so that they can determine
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* what services are available.
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*/
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/*
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TODO: Honor remote device's buffer size constraints via continuation state
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*/
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#define INCLUDE_FROM_SERVICEDISCOVERYPROTOCOL_C
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#include "SDP.h"
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/** Service attribute table list, containing a pointer to each service attribute table the device contains */
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const ServiceAttributeTable_t* SDP_Services_Table[] PROGMEM =
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{
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SerialPort_Attribute_Table,
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};
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/** Base UUID value common to all standardized Bluetooth services */
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const UUID_t BaseUUID PROGMEM = {0x00000000, BASE_80BIT_UUID};
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/** Main Service Discovery Protocol packet processing routine. This function processes incoming SDP packets from
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* a connected Bluetooth device, and sends back appropriate responses to allow other devices to determine the
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* services the local device exposes.
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*
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* \param[in] Data Incoming packet data containing the SDP request
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* \param[in] Channel ACL channel the request was issued to by the remote device
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*/
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void SDP_ProcessPacket(void* Data, Bluetooth_Channel_t* const Channel)
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{
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SDP_PDUHeader_t* SDPHeader = (SDP_PDUHeader_t*)Data;
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SDPHeader->ParameterLength = SwapEndian_16(SDPHeader->ParameterLength);
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BT_SDP_DEBUG(1, "SDP Packet Received");
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BT_SDP_DEBUG(2, "-- PDU ID: 0x%02X", SDPHeader->PDU);
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BT_SDP_DEBUG(2, "-- Param Length: 0x%04X", SDPHeader->ParameterLength);
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/* Dispatch to the correct processing routine for the given SDP packet type */
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switch (SDPHeader->PDU)
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{
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case SDP_PDU_SERVICESEARCHREQUEST:
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SDP_ProcessServiceSearch(SDPHeader, Channel);
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break;
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case SDP_PDU_SERVICEATTRIBUTEREQUEST:
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SDP_ProcessServiceAttribute(SDPHeader, Channel);
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break;
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case SDP_PDU_SERVICESEARCHATTRIBUTEREQUEST:
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SDP_ProcessServiceSearchAttribute(SDPHeader, Channel);
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break;
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}
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}
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/** Internal processing routine for SDP Service Search Requests.
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*
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* \param[in] SDPHeader Pointer to the start of the issued SDP request
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* \param[in] Channel Pointer to the Bluetooth channel structure the request was issued to
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*/
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static void SDP_ProcessServiceSearch(const SDP_PDUHeader_t* const SDPHeader,
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Bluetooth_Channel_t* const Channel)
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{
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const void* CurrentParameter = ((const void*)SDPHeader + sizeof(SDP_PDUHeader_t));
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BT_SDP_DEBUG(1, "<< Service Search");
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/* Retrieve the list of search UUIDs from the request */
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uint8_t UUIDList[12][UUID_SIZE_BYTES];
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uint8_t TotalUUIDs = SDP_GetUUIDList(UUIDList, &CurrentParameter);
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BT_SDP_DEBUG(2, "-- Total UUIDs: %d", TotalUUIDs);
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/* Retrieve the maximum service record response count from the request */
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uint16_t MaxServiceRecordCount = SDP_ReadData16(&CurrentParameter);
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BT_SDP_DEBUG(2, "-- Max Return Service Count: 0x%04X", MaxServiceRecordCount);
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struct
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{
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SDP_PDUHeader_t SDPHeader;
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uint16_t TotalServiceRecordCount;
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uint16_t CurrentServiceRecordCount;
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uint8_t ResponseData[100];
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} ResponsePacket;
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uint8_t AddedServiceHandles = 0;
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/* Create a pointer to the buffer to indicate the current location for response data to be added */
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void* CurrResponsePos = ResponsePacket.ResponseData;
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/* Search through the global service list an item at a time */
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for (uint8_t CurrTableItem = 0; CurrTableItem < (sizeof(SDP_Services_Table) / sizeof(void*)); CurrTableItem++)
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{
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/* Read in a pointer to the current UUID table entry's Attribute table */
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ServiceAttributeTable_t* CurrAttributeTable = pgm_read_ptr(&SDP_Services_Table[CurrTableItem]);
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if (!(SDP_SearchServiceTable(UUIDList, TotalUUIDs, CurrAttributeTable)))
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continue;
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BT_SDP_DEBUG(2, " -- Found search match in table");
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/* Retrieve a PROGMEM pointer to the value of the service's record handle */
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const void* AttributeValue = SDP_GetAttributeValue(CurrAttributeTable, SDP_ATTRIBUTE_ID_SERVICERECORDHANDLE);
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/* Copy over the service record handle to the response list */
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uint8_t AttrHeaderSize;
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uint8_t AttrSize = SDP_GetLocalAttributeContainerSize(AttributeValue, &AttrHeaderSize);
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memcpy_P(CurrResponsePos, AttributeValue + AttrHeaderSize, AttrSize);
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CurrResponsePos += AttrHeaderSize + AttrSize;
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AddedServiceHandles++;
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}
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/* Continuation state - always zero */
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SDP_WriteData8(&CurrResponsePos, 0);
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/* Fill out the service record count values in the returned packet */
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ResponsePacket.TotalServiceRecordCount = SwapEndian_16(AddedServiceHandles);
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ResponsePacket.CurrentServiceRecordCount = ResponsePacket.TotalServiceRecordCount;
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/* Calculate the total parameter length that is to be sent, including the fixed return parameters, the created service
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handle list and the SDP continuation state */
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uint16_t ParamLength = (ResponsePacket.CurrentServiceRecordCount << 2) +
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sizeof(ResponsePacket.CurrentServiceRecordCount) +
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sizeof(ResponsePacket.TotalServiceRecordCount) +
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sizeof(uint8_t);
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/* Fill in the response packet's header */
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ResponsePacket.SDPHeader.PDU = SDP_PDU_SERVICESEARCHRESPONSE;
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ResponsePacket.SDPHeader.TransactionID = SDPHeader->TransactionID;
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ResponsePacket.SDPHeader.ParameterLength = SwapEndian_16(ParamLength);
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BT_SDP_DEBUG(1, ">> Service Search Response");
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/* Send the completed response packet to the sender */
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Bluetooth_SendPacket(&ResponsePacket, (sizeof(ResponsePacket.SDPHeader) + ParamLength), Channel);
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}
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/** Internal processing routine for SDP Service Attribute Requests.
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*
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* \param[in] SDPHeader Pointer to the start of the issued SDP request
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* \param[in] Channel Pointer to the Bluetooth channel structure the request was issued to
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*/
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static void SDP_ProcessServiceAttribute(const SDP_PDUHeader_t* const SDPHeader,
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Bluetooth_Channel_t* const Channel)
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{
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const void* CurrentParameter = ((const void*)SDPHeader + sizeof(SDP_PDUHeader_t));
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BT_SDP_DEBUG(1, "<< Service Attribute");
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/* Retrieve the service handle whose attributes are to be examined */
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uint32_t ServiceHandle = SDP_ReadData32(&CurrentParameter);
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BT_SDP_DEBUG(2, "-- Service Handle: 0x%08lX", ServiceHandle);
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/* Retrieve the maximum Attribute response size from the request */
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uint16_t MaxAttributeSize = SDP_ReadData16(&CurrentParameter);
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BT_SDP_DEBUG(2, "-- Max Return Attribute Bytes: 0x%04X", MaxAttributeSize);
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/* Retrieve the list of Attributes from the request */
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uint16_t AttributeList[8][2];
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uint8_t TotalAttributes = SDP_GetAttributeList(AttributeList, &CurrentParameter);
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BT_SDP_DEBUG(2, "-- Total Attributes: %d", TotalAttributes);
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struct
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{
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SDP_PDUHeader_t SDPHeader;
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uint16_t AttributeListByteCount;
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uint8_t ResponseData[100];
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} ResponsePacket;
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/* Create a pointer to the buffer to indicate the current location for response data to be added */
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void* CurrResponsePos = ResponsePacket.ResponseData;
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/* Clamp the maximum attribute size to the size of the allocated buffer */
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if (MaxAttributeSize > sizeof(ResponsePacket.ResponseData))
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MaxAttributeSize = sizeof(ResponsePacket.ResponseData);
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uint16_t TotalResponseSize = 0;
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/* Search through the global UUID list an item at a time */
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for (uint8_t CurrTableItem = 0; CurrTableItem < (sizeof(SDP_Services_Table) / sizeof(void*)); CurrTableItem++)
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{
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/* Read in a pointer to the current UUID table entry's Attribute table */
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ServiceAttributeTable_t* CurrAttributeTable = pgm_read_ptr(&SDP_Services_Table[CurrTableItem]);
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/* Retrieve a PROGMEM pointer to the value of the Service Record Handle */
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const void* ServiceRecord = SDP_GetAttributeValue(CurrAttributeTable, SDP_ATTRIBUTE_ID_SERVICERECORDHANDLE);
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/* Get the size of the header for the Service Record Handle */
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uint8_t AttrHeaderSize;
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SDP_GetLocalAttributeContainerSize(ServiceRecord, &AttrHeaderSize);
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/* Retrieve the endian-swapped service handle of the current service being examined */
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uint32_t CurrServiceHandle = SwapEndian_32(pgm_read_dword(ServiceRecord + AttrHeaderSize));
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/* Check if the current service in the service table has the requested service handle */
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if (ServiceHandle == CurrServiceHandle)
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{
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/* Add the listed attributes for the found UUID to the response */
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TotalResponseSize = SDP_AddListedAttributesToResponse(CurrAttributeTable, AttributeList, TotalAttributes,
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&CurrResponsePos);
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/* Requested service found, abort the search through the service table */
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break;
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}
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}
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/* Continuation state - always zero */
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SDP_WriteData8(&CurrResponsePos, 0);
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/* Set the total response list size to the size of the outer container plus its header size and continuation state */
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ResponsePacket.AttributeListByteCount = SwapEndian_16(TotalResponseSize);
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/* Calculate the total parameter length that is to be sent, including the fixed return parameters, the created attribute
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value list and the SDP continuation state */
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uint16_t ParamLength = (sizeof(ResponsePacket.AttributeListByteCount) + TotalResponseSize + sizeof(uint8_t));
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/* Fill in the response packet's header */
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ResponsePacket.SDPHeader.PDU = SDP_PDU_SERVICEATTRIBUTERESPONSE;
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ResponsePacket.SDPHeader.TransactionID = SDPHeader->TransactionID;
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ResponsePacket.SDPHeader.ParameterLength = SwapEndian_16(ParamLength);
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BT_SDP_DEBUG(1, ">> Service Attribute Response");
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BT_SDP_DEBUG(2, "-- Param Len 0x%04X", ParamLength);
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/* Send the completed response packet to the sender */
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Bluetooth_SendPacket(&ResponsePacket, (sizeof(ResponsePacket.SDPHeader) + ParamLength), Channel);
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}
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/** Internal processing routine for SDP Service Search Attribute Requests.
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*
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* \param[in] SDPHeader Pointer to the start of the issued SDP request
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* \param[in] Channel Pointer to the Bluetooth channel structure the request was issued to
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*/
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static void SDP_ProcessServiceSearchAttribute(const SDP_PDUHeader_t* const SDPHeader,
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Bluetooth_Channel_t* const Channel)
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{
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const void* CurrentParameter = ((const void*)SDPHeader + sizeof(SDP_PDUHeader_t));
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BT_SDP_DEBUG(1, "<< Service Search Attribute");
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/* Retrieve the list of search UUIDs from the request */
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uint8_t UUIDList[12][UUID_SIZE_BYTES];
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uint8_t TotalUUIDs = SDP_GetUUIDList(UUIDList, &CurrentParameter);
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BT_SDP_DEBUG(2, "-- Total UUIDs: %d", TotalUUIDs);
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/* Retrieve the maximum Attribute response size from the request */
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uint16_t MaxAttributeSize = SDP_ReadData16(&CurrentParameter);
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BT_SDP_DEBUG(2, "-- Max Return Attribute Bytes: 0x%04X", MaxAttributeSize);
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/* Retrieve the list of Attributes from the request */
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uint16_t AttributeList[8][2];
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uint8_t TotalAttributes = SDP_GetAttributeList(AttributeList, &CurrentParameter);
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BT_SDP_DEBUG(2, "-- Total Attributes: %d", TotalAttributes);
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struct
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{
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SDP_PDUHeader_t SDPHeader;
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uint16_t AttributeListByteCount;
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uint8_t ResponseData[100];
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} ResponsePacket;
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/* Create a pointer to the buffer to indicate the current location for response data to be added */
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void* CurrResponsePos = ResponsePacket.ResponseData;
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/* Clamp the maximum attribute size to the size of the allocated buffer */
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if (MaxAttributeSize > sizeof(ResponsePacket.ResponseData))
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MaxAttributeSize = sizeof(ResponsePacket.ResponseData);
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/* Add the outer Data Element Sequence header for all of the retrieved Attributes */
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uint16_t* TotalResponseSize = SDP_AddSequence16(&CurrResponsePos);
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/* Search through the global service list an item at a time */
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for (uint8_t CurrTableItem = 0; CurrTableItem < (sizeof(SDP_Services_Table) / sizeof(void*)); CurrTableItem++)
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{
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/* Read in a pointer to the current UUID table entry's Attribute table */
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ServiceAttributeTable_t* CurrAttributeTable = pgm_read_ptr(&SDP_Services_Table[CurrTableItem]);
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if (!(SDP_SearchServiceTable(UUIDList, TotalUUIDs, CurrAttributeTable)))
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continue;
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BT_SDP_DEBUG(2, " -- Found search match in table");
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/* Add the listed attributes for the found UUID to the response */
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*TotalResponseSize += SDP_AddListedAttributesToResponse(CurrAttributeTable, AttributeList, TotalAttributes,
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&CurrResponsePos);
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}
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/* Continuation state - always zero */
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SDP_WriteData8(&CurrResponsePos, 0);
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/* Set the total response list size to the size of the outer container plus its header size and continuation state */
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ResponsePacket.AttributeListByteCount = SwapEndian_16(3 + *TotalResponseSize);
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/* Calculate the total parameter length that is to be sent, including the fixed return parameters, the created attribute
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value list and the SDP continuation state */
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uint16_t ParamLength = (sizeof(ResponsePacket.AttributeListByteCount) +
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(3 + *TotalResponseSize) +
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sizeof(uint8_t));
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/* Flip the endianness of the container's size */
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*TotalResponseSize = SwapEndian_16(*TotalResponseSize);
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/* Fill in the response packet's header */
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ResponsePacket.SDPHeader.PDU = SDP_PDU_SERVICESEARCHATTRIBUTERESPONSE;
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ResponsePacket.SDPHeader.TransactionID = SDPHeader->TransactionID;
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ResponsePacket.SDPHeader.ParameterLength = SwapEndian_16(ParamLength);
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BT_SDP_DEBUG(1, ">> Service Search Attribute Response");
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BT_SDP_DEBUG(2, "-- Param Len 0x%04X", ParamLength);
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/* Send the completed response packet to the sender */
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Bluetooth_SendPacket(&ResponsePacket, (sizeof(ResponsePacket.SDPHeader) + ParamLength), Channel);
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}
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/** Adds all the Attributes in the given service table to the response that appear in the Attribute table.
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*
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* \param[in] AttributeTable Pointer to an Attribute table for the service to examine
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* \param[in] AttributeList Pointer to a list of Attribute ranges
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* \param[in] TotalAttributes Number of Attributes stored in the Attribute list
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* \param[out] BufferPos Pointer to the output buffer position where the retrieved attributes are to be stored
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*
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* \return Number of bytes added to the output buffer
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*/
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static uint16_t SDP_AddListedAttributesToResponse(const ServiceAttributeTable_t* AttributeTable,
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uint16_t AttributeList[][2],
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const uint8_t TotalAttributes,
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void** const BufferPos)
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{
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uint16_t TotalResponseSize;
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/* Add an inner Data Element Sequence header for the current services's found Attributes */
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uint16_t* AttributeListSize = SDP_AddSequence16(BufferPos);
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/* Search through the list of Attributes one at a time looking for values in the current UUID's Attribute table */
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for (uint8_t CurrAttribute = 0; CurrAttribute < TotalAttributes; CurrAttribute++)
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{
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uint16_t* AttributeIDRange = AttributeList[CurrAttribute];
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void* AttributeValue;
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/* Look through the current service's attribute list, examining all the attributes */
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while ((AttributeValue = pgm_read_ptr(&AttributeTable->Data)) != NULL)
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{
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/* Get the current Attribute's ID from the current attribute table entry */
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uint16_t CurrAttributeID = pgm_read_word(&AttributeTable->AttributeID);
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/* Check if the current Attribute's ID is within the current Attribute range */
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if ((CurrAttributeID >= AttributeIDRange[0]) && (CurrAttributeID <= AttributeIDRange[1]))
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{
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/* Increment the current UUID's returned Attribute container size by the number of added bytes */
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*AttributeListSize += SDP_AddAttributeToResponse(CurrAttributeID, AttributeValue, BufferPos);
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}
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AttributeTable++;
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}
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}
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/* Record the total number of added bytes to the buffer */
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TotalResponseSize = 3 + *AttributeListSize;
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/* Fix endianness of the added attribute data element sequence */
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*AttributeListSize = SwapEndian_16(*AttributeListSize);
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return TotalResponseSize;
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}
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/** Adds the given attribute ID and value to the response buffer, and advances the response buffer pointer past the added data.
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*
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* \param[in] AttributeID Attribute ID to add to the response buffer
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* \param[in] AttributeValue Pointer to the start of the Attribute's value, located in PROGMEM
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* \param[in, out] ResponseBuffer Pointer to a buffer where the Attribute and Attribute Value is to be added
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*
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* \return Number of bytes added to the response buffer
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*/
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static uint16_t SDP_AddAttributeToResponse(const uint16_t AttributeID,
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const void* AttributeValue,
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void** ResponseBuffer)
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{
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/* Retrieve the size of the attribute value from its container header */
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uint8_t AttributeHeaderLength;
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uint16_t AttributeValueLength = SDP_GetLocalAttributeContainerSize(AttributeValue, &AttributeHeaderLength);
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BT_SDP_DEBUG(2, " -- Add Attribute (0x%04X) 0x%04X", (AttributeHeaderLength + AttributeValueLength), AttributeID);
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/* Add a Data Element header to the response for the Attribute ID */
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SDP_WriteData8(ResponseBuffer, (SDP_DATATYPE_UnsignedInt | SDP_DATASIZE_16Bit));
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/* Add the Attribute ID to the created Data Element */
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SDP_WriteData16(ResponseBuffer, AttributeID);
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/* Copy over the Attribute value Data Element container to the response */
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memcpy_P(*ResponseBuffer, AttributeValue, AttributeHeaderLength + AttributeValueLength);
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*ResponseBuffer += AttributeHeaderLength + AttributeValueLength;
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return (sizeof(uint8_t) + sizeof(uint16_t) + AttributeHeaderLength + AttributeValueLength);
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}
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/** Retrieves a pointer to the value of the given Attribute ID from the given Attribute table.
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*
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* \param[in] AttributeTable Pointer to the Attribute table to search in
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* \param[in] AttributeID Attribute ID to search for within the table
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*
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* \return Pointer to the start of the Attribute's value if found within the table, NULL otherwise
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*/
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static void* SDP_GetAttributeValue(const ServiceAttributeTable_t* AttributeTable,
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const uint16_t AttributeID)
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{
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void* CurrTableItemData;
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/* Search through the current Attribute table, abort when the terminator item has been reached */
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while ((CurrTableItemData = pgm_read_ptr(&AttributeTable->Data)) != NULL)
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{
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/* Check if the current Attribute ID matches the search ID - if so return a pointer to it */
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if (pgm_read_word(&AttributeTable->AttributeID) == AttributeID)
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return CurrTableItemData;
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AttributeTable++;
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}
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return NULL;
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}
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/** Retrieves the Attribute table for the given UUID list if it exists.
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*
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* \param[in] UUIDList List of UUIDs which must be matched within the service attribute table
|
|
* \param[in] TotalUUIDs Total number of UUIDs stored in the UUID list
|
|
* \param[in] CurrAttributeTable Pointer to the service attribute table to search through
|
|
*
|
|
* \return True if all the UUIDs given in the UUID list appear in the given attribute table, false otherwise
|
|
*/
|
|
static bool SDP_SearchServiceTable(uint8_t UUIDList[][UUID_SIZE_BYTES],
|
|
const uint8_t TotalUUIDs,
|
|
const ServiceAttributeTable_t* CurrAttributeTable)
|
|
{
|
|
const void* CurrAttribute;
|
|
uint16_t UUIDMatchFlags = 0;
|
|
|
|
/* Search through the current attribute table, checking each attribute value for UUID matches */
|
|
while ((CurrAttribute = pgm_read_ptr(&CurrAttributeTable->Data)) != NULL)
|
|
{
|
|
SDP_CheckUUIDMatch(UUIDList, TotalUUIDs, &UUIDMatchFlags, CurrAttribute);
|
|
CurrAttributeTable++;
|
|
}
|
|
|
|
/* Determine how many UUID matches in the list we have found */
|
|
uint8_t UUIDMatches;
|
|
for (UUIDMatches = 0; UUIDMatchFlags; UUIDMatches++)
|
|
UUIDMatchFlags &= (UUIDMatchFlags - 1);
|
|
|
|
/* If all UUIDs have been matched to the current service, return true */
|
|
return (UUIDMatches == TotalUUIDs);
|
|
}
|
|
|
|
/** Recursively unwraps the given locally stored attribute (in PROGMEM space), searching for UUIDs to match against
|
|
* the given UUID list. As matches are found, they are indicated in the UUIDMatch flag list.
|
|
*
|
|
* \param[in] UUIDList List of UUIDs which must be matched within the service attribute table
|
|
* \param[in] TotalUUIDs Total number of UUIDs stored in the UUID list
|
|
* \param[in, out] UUIDMatchFlags Array of flags indicating which UUIDs in the list have already been matched
|
|
* \param[in] CurrAttribute Pointer to the current attribute to search through
|
|
*
|
|
* \return True if all the UUIDs given in the UUID list appear in the given attribute table, false otherwise
|
|
*/
|
|
static void SDP_CheckUUIDMatch(uint8_t UUIDList[][UUID_SIZE_BYTES],
|
|
const uint8_t TotalUUIDs,
|
|
uint16_t* const UUIDMatchFlags,
|
|
const void* CurrAttribute)
|
|
{
|
|
uint8_t CurrAttributeType = (pgm_read_byte(CurrAttribute) & ~0x07);
|
|
|
|
/* Check the data type of the current attribute value - if UUID, compare, if Sequence, unwrap and recurse */
|
|
if (CurrAttributeType == SDP_DATATYPE_UUID)
|
|
{
|
|
uint16_t CurrUUIDMatchMask = (1 << 0);
|
|
|
|
/* Look for matches in the UUID list against the current attribute UUID value */
|
|
for (uint8_t i = 0; i < TotalUUIDs; i++)
|
|
{
|
|
/* Check if the current unmatched UUID is identical to the search UUID */
|
|
if (!(*UUIDMatchFlags & CurrUUIDMatchMask) && !(memcmp_P(UUIDList[i], (CurrAttribute + 1), UUID_SIZE_BYTES)))
|
|
{
|
|
/* Indicate match found for the current attribute UUID and early-abort */
|
|
*UUIDMatchFlags |= CurrUUIDMatchMask;
|
|
break;
|
|
}
|
|
|
|
CurrUUIDMatchMask <<= 1;
|
|
}
|
|
}
|
|
else if (CurrAttributeType == SDP_DATATYPE_Sequence)
|
|
{
|
|
uint8_t SequenceHeaderSize;
|
|
uint16_t SequenceSize = SDP_GetLocalAttributeContainerSize(CurrAttribute, &SequenceHeaderSize);
|
|
|
|
CurrAttribute += SequenceHeaderSize;
|
|
|
|
/* Recursively unwrap the sequence container, and re-search its contents for UUIDs */
|
|
while (SequenceSize)
|
|
{
|
|
uint8_t InnerHeaderSize;
|
|
uint16_t InnerSize = SDP_GetLocalAttributeContainerSize(CurrAttribute, &InnerHeaderSize);
|
|
|
|
/* Recursively search of the next element in the sequence, trying to match UUIDs with the UUID list */
|
|
SDP_CheckUUIDMatch(UUIDList, TotalUUIDs, UUIDMatchFlags, CurrAttribute);
|
|
|
|
/* Skip to the next element in the sequence */
|
|
SequenceSize -= InnerHeaderSize + InnerSize;
|
|
CurrAttribute += InnerHeaderSize + InnerSize;
|
|
}
|
|
}
|
|
}
|
|
|
|
/** Reads in the collection of Attribute ranges from the input buffer's Data Element Sequence container, into the given
|
|
* Attribute list for later use. Once complete, the input buffer pointer is advanced to the end of the Attribute container.
|
|
*
|
|
* \param[out] AttributeList Pointer to a buffer where the list of Attribute ranges are to be stored
|
|
* \param[in] CurrentParameter Pointer to a Buffer containing a Data Element Sequence of Attribute and Attribute Range elements
|
|
*
|
|
* \return Total number of Attribute ranges stored in the Data Element Sequence
|
|
*/
|
|
static uint8_t SDP_GetAttributeList(uint16_t AttributeList[][2],
|
|
const void** const CurrentParameter)
|
|
{
|
|
uint8_t ElementHeaderSize;
|
|
uint8_t TotalAttributes = 0;
|
|
|
|
/* Retrieve the total size of the Attribute container, and unwrap the outer Data Element Sequence container */
|
|
uint16_t AttributeIDListLength = SDP_GetDataElementSize(CurrentParameter, &ElementHeaderSize);
|
|
BT_SDP_DEBUG(2, "-- Total Attribute Length: 0x%04X", AttributeIDListLength);
|
|
while (AttributeIDListLength)
|
|
{
|
|
/* Retrieve the size of the next Attribute in the container and get a pointer to the next free Attribute element in the list */
|
|
uint16_t* CurrentAttributeRange = AttributeList[TotalAttributes++];
|
|
uint8_t AttributeLength = SDP_GetDataElementSize(CurrentParameter, &ElementHeaderSize);
|
|
|
|
/* Copy over the starting Attribute ID and (if it the current element is a range) the ending Attribute ID */
|
|
memcpy(&CurrentAttributeRange[0], *CurrentParameter, AttributeLength);
|
|
|
|
/* If the element is not an Attribute Range, copy over the starting ID to the ending ID to make a range of 1 */
|
|
if (AttributeLength == 2)
|
|
CurrentAttributeRange[1] = CurrentAttributeRange[0];
|
|
|
|
/* Swap the endianness of the attribute range values */
|
|
CurrentAttributeRange[0] = SwapEndian_16(CurrentAttributeRange[0]);
|
|
CurrentAttributeRange[1] = SwapEndian_16(CurrentAttributeRange[1]);
|
|
|
|
BT_SDP_DEBUG(2, "-- Attribute: 0x%04X-0x%04X", CurrentAttributeRange[0], CurrentAttributeRange[1]);
|
|
|
|
AttributeIDListLength -= (AttributeLength + ElementHeaderSize);
|
|
*CurrentParameter += AttributeLength;
|
|
}
|
|
|
|
return TotalAttributes;
|
|
}
|
|
|
|
/** Reads in the collection of UUIDs from the input buffer's Data Element Sequence container, into the given
|
|
* UUID list for later use. Once complete, the input buffer pointer is advanced to the end of the UUID container.
|
|
*
|
|
* \param[out] UUIDList Pointer to a buffer where the list of UUIDs are to be stored
|
|
* \param[in] CurrentParameter Pointer to a Buffer containing a Data Element Sequence of UUID elements
|
|
*
|
|
* \return Total number of UUIDs stored in the Data Element Sequence
|
|
*/
|
|
static uint8_t SDP_GetUUIDList(uint8_t UUIDList[][UUID_SIZE_BYTES],
|
|
const void** const CurrentParameter)
|
|
{
|
|
uint8_t ElementHeaderSize;
|
|
uint8_t TotalUUIDs = 0;
|
|
|
|
/* Retrieve the total size of the UUID container, and unwrap the outer Data Element Sequence container */
|
|
uint16_t ServicePatternLength = SDP_GetDataElementSize(CurrentParameter, &ElementHeaderSize);
|
|
BT_SDP_DEBUG(2, "-- Total UUID Length: 0x%04X", ServicePatternLength);
|
|
while (ServicePatternLength)
|
|
{
|
|
/* Retrieve the size of the next UUID in the container and get a pointer to the next free UUID element in the list */
|
|
uint8_t* CurrentUUID = UUIDList[TotalUUIDs++];
|
|
uint8_t UUIDLength = SDP_GetDataElementSize(CurrentParameter, &ElementHeaderSize);
|
|
|
|
/* Copy over UUID from the container to the free slot */
|
|
if (UUIDLength <= 4)
|
|
{
|
|
/* Copy over the base UUID value to the free UUID slot in the list */
|
|
memcpy_P(CurrentUUID, &BaseUUID, sizeof(BaseUUID));
|
|
|
|
/* Copy over short UUID */
|
|
memcpy(CurrentUUID + (4 - UUIDLength), *CurrentParameter, UUIDLength);
|
|
}
|
|
else
|
|
{
|
|
/* Copy over full UUID */
|
|
memcpy(CurrentUUID, *CurrentParameter, UUIDLength);
|
|
}
|
|
|
|
BT_SDP_DEBUG(2, "-- UUID (%d): %02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X",
|
|
UUIDLength,
|
|
CurrentUUID[0], CurrentUUID[1], CurrentUUID[2], CurrentUUID[3],
|
|
CurrentUUID[4], CurrentUUID[5],
|
|
CurrentUUID[6], CurrentUUID[7],
|
|
CurrentUUID[8], CurrentUUID[9],
|
|
CurrentUUID[10], CurrentUUID[11], CurrentUUID[12], CurrentUUID[13], CurrentUUID[14], CurrentUUID[15]);
|
|
|
|
ServicePatternLength -= (UUIDLength + ElementHeaderSize);
|
|
*CurrentParameter += UUIDLength;
|
|
}
|
|
|
|
return TotalUUIDs;
|
|
}
|
|
|
|
/** Retrieves the total size of the given locally stored (in PROGMEM) attribute Data Element container.
|
|
*
|
|
* \param[in] AttributeData Pointer to the start of the Attribute container, located in PROGMEM
|
|
* \param[out] HeaderSize Pointer to a location where the header size of the data element is to be stored
|
|
*
|
|
* \return Size in bytes of the entire attribute container, including the header
|
|
*/
|
|
static uint32_t SDP_GetLocalAttributeContainerSize(const void* const AttributeData,
|
|
uint8_t* const HeaderSize)
|
|
{
|
|
/* Fetch the size of the Data Element structure from the header */
|
|
uint8_t SizeIndex = (pgm_read_byte(AttributeData) & 0x07);
|
|
|
|
uint32_t ElementValueSize;
|
|
|
|
/* Convert the Data Element size index into a size in bytes */
|
|
switch (SizeIndex)
|
|
{
|
|
case SDP_DATASIZE_Variable8Bit:
|
|
*HeaderSize = (1 + sizeof(uint8_t));
|
|
ElementValueSize = pgm_read_byte(AttributeData + 1);
|
|
break;
|
|
case SDP_DATASIZE_Variable16Bit:
|
|
*HeaderSize = (1 + sizeof(uint16_t));
|
|
ElementValueSize = SwapEndian_16(pgm_read_word(AttributeData + 1));
|
|
break;
|
|
case SDP_DATASIZE_Variable32Bit:
|
|
*HeaderSize = (1 + sizeof(uint32_t));
|
|
ElementValueSize = SwapEndian_32(pgm_read_dword(AttributeData + 1));
|
|
break;
|
|
default:
|
|
*HeaderSize = 1;
|
|
ElementValueSize = (1 << SizeIndex);
|
|
break;
|
|
}
|
|
|
|
return ElementValueSize;
|
|
}
|
|
|
|
/** Retrieves the size of a Data Element container from the current input buffer, and advances the input buffer
|
|
* pointer to the start of the Data Element's contents.
|
|
*
|
|
* \param[in, out] DataElementHeader Pointer to the start of a Data Element header
|
|
* \param[out] ElementHeaderSize Size in bytes of the header that was skipped
|
|
*
|
|
* \return Size in bytes of the Data Element container's contents, minus the header
|
|
*/
|
|
static uint32_t SDP_GetDataElementSize(const void** const DataElementHeader,
|
|
uint8_t* const ElementHeaderSize)
|
|
{
|
|
/* Fetch the size of the Data Element structure from the header, increment the current buffer pos */
|
|
uint8_t SizeIndex = (SDP_ReadData8(DataElementHeader) & 0x07);
|
|
|
|
uint32_t ElementValueSize;
|
|
|
|
/* Convert the Data Element size index into a size in bytes */
|
|
switch (SizeIndex)
|
|
{
|
|
case SDP_DATASIZE_Variable8Bit:
|
|
*ElementHeaderSize = (1 + sizeof(uint8_t));
|
|
ElementValueSize = SDP_ReadData8(DataElementHeader);
|
|
break;
|
|
case SDP_DATASIZE_Variable16Bit:
|
|
*ElementHeaderSize = (1 + sizeof(uint16_t));
|
|
ElementValueSize = SDP_ReadData16(DataElementHeader);
|
|
break;
|
|
case SDP_DATASIZE_Variable32Bit:
|
|
*ElementHeaderSize = (1 + sizeof(uint32_t));
|
|
ElementValueSize = SDP_ReadData32(DataElementHeader);
|
|
break;
|
|
default:
|
|
*ElementHeaderSize = 1;
|
|
ElementValueSize = (1 << SizeIndex);
|
|
break;
|
|
}
|
|
|
|
return ElementValueSize;
|
|
}
|