-/*
- LUFA Library
- Copyright (C) Dean Camera, 2010.
-
- dean [at] fourwalledcubicle [dot] com
- www.fourwalledcubicle.com
-*/
-
-/*
- Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)
-
- Permission to use, copy, modify, distribute, and sell this
- software and its documentation for any purpose is hereby granted
- without fee, provided that the above copyright notice appear in
- all copies and that both that the copyright notice and this
- permission notice and warranty disclaimer appear in supporting
- documentation, and that the name of the author not be used in
- advertising or publicity pertaining to distribution of the
- software without specific, written prior permission.
-
- The author disclaim all warranties with regard to this
- software, including all implied warranties of merchantability
- and fitness. In no event shall the author be liable for any
- special, indirect or consequential damages or any damages
- whatsoever resulting from loss of use, data or profits, whether
- in an action of contract, negligence or other tortious action,
- arising out of or in connection with the use or performance of
- this software.
-*/
-
-/** \file
- *
- * SDP layer module. This module implements a simple Service Discovery
- * Protocol server, which can broadcast the device's supported services
- * to other Bluetooth devices upon request, so that they can determine
- * what services are available.
- */
-
-/*
- TODO: Honor remote device's buffer size constraints via continuation state
- */
-
-#define INCLUDE_FROM_SERVICEDISCOVERYPROTOCOL_C
-#include "ServiceDiscoveryProtocol.h"
-
-/** Service attribute table list, containing a pointer to each service attribute table the device contains */
-const ServiceAttributeTable_t* SDP_Services_Table[] PROGMEM =
- {
- SerialPort_Attribute_Table,
- };
-
-/** Base UUID value common to all standardized Bluetooth services */
-const UUID_t BaseUUID PROGMEM = {0x00000000, BASE_80BIT_UUID};
-
-/** Initializes the SDP service, ready for new connections from a SDP client. */
-void SDP_Initialize(void)
-{
- /* Not currently used */
-}
-
-/** Main Service Discovery Protocol packet processing routine. This function processes incomming SDP packets from
- * a connected Bluetooth device, and sends back appropriate responses to allow other devices to determine the
- * services the local device exposes.
- *
- * \param[in] Data Incomming packet data containing the SDP request
- * \param[in] Channel Channel the request was issued to by the remote device
- */
-void SDP_ProcessPacket(void* Data, Bluetooth_Channel_t* const Channel)
-{
- SDP_PDUHeader_t* SDPHeader = (SDP_PDUHeader_t*)Data;
- SDPHeader->ParameterLength = SwapEndian_16(SDPHeader->ParameterLength);
-
- BT_SDP_DEBUG(1, "SDP Packet Received");
- BT_SDP_DEBUG(2, "-- PDU ID: 0x%02X", SDPHeader->PDU);
- BT_SDP_DEBUG(2, "-- Param Length: 0x%04X", SDPHeader->ParameterLength);
-
- /* Dispatch to the correct processing routine for the given SDP packet type */
- switch (SDPHeader->PDU)
- {
- case SDP_PDU_SERVICESEARCHREQUEST:
- SDP_ProcessServiceSearch(SDPHeader, Channel);
- break;
- case SDP_PDU_SERVICEATTRIBUTEREQUEST:
- SDP_ProcessServiceAttribute(SDPHeader, Channel);
- break;
- case SDP_PDU_SERVICESEARCHATTRIBUTEREQUEST:
- SDP_ProcessServiceSearchAttribute(SDPHeader, Channel);
- break;
- }
-}
-
-/** Internal processing routine for SDP Service Search Requests.
- *
- * \param[in] SDPHeader Pointer to the start of the issued SDP request
- * \param[in] Channel Pointer to the Bluetooth channel structure the request was issued to
- */
-static void SDP_ProcessServiceSearch(const SDP_PDUHeader_t* const SDPHeader, Bluetooth_Channel_t* const Channel)
-{
- const void* CurrentParameter = ((void*)SDPHeader + sizeof(SDP_PDUHeader_t));
-
- BT_SDP_DEBUG(1, "<< Service Search");
-
- /* Retrieve the list of search UUIDs from the request */
- uint8_t UUIDList[12][UUID_SIZE_BYTES];
- uint8_t TotalUUIDs = SDP_GetUUIDList(UUIDList, &CurrentParameter);
- BT_SDP_DEBUG(2, "-- Total UUIDs: %d", TotalUUIDs);
-
- /* Retrieve the maximum service record reponse count from the request */
- uint16_t MaxServiceRecordCount = SDP_ReadData16(&CurrentParameter);
- BT_SDP_DEBUG(2, "-- Max Return Service Count: 0x%04X", MaxServiceRecordCount);
-
- struct
- {
- SDP_PDUHeader_t SDPHeader;
- uint16_t TotalServiceRecordCount;
- uint16_t CurrentServiceRecordCount;
- uint8_t ResponseData[100];
- } ResponsePacket;
-
- uint8_t AddedServiceHandles = 0;
-
- /* Create a pointer to the buffer to indicate the current location for response data to be added */
- void* CurrResponsePos = ResponsePacket.ResponseData;
-
- /* Search through the global service list an item at a time */
- for (uint8_t CurrTableItem = 0; CurrTableItem < (sizeof(SDP_Services_Table) / sizeof(void*)); CurrTableItem++)
- {
- /* Read in a pointer to the current UUID table entry's Attribute table */
- ServiceAttributeTable_t* CurrAttributeTable = pgm_read_ptr(&SDP_Services_Table[CurrTableItem]);
-
- if (!(SDP_SearchServiceTable(UUIDList, TotalUUIDs, CurrAttributeTable)))
- continue;
-
- BT_SDP_DEBUG(2, " -- Found search match in table");
-
- /* Retrieve a PROGMEM pointer to the value of the service's record handle */
- const void* AttributeValue = SDP_GetAttributeValue(CurrAttributeTable, SDP_ATTRIBUTE_ID_SERVICERECORDHANDLE);
-
- /* Copy over the service record handle to the response list */
- uint8_t AttrHeaderSize;
- uint8_t AttrSize = SDP_GetLocalAttributeContainerSize(AttributeValue, &AttrHeaderSize);
- memcpy_P(CurrResponsePos, AttributeValue + AttrHeaderSize, AttrSize);
- CurrResponsePos += AttrHeaderSize + AttrSize;
-
- AddedServiceHandles++;
- }
-
- /* Continuation state - always zero */
- SDP_WriteData8(&CurrResponsePos, 0);
-
- /* Fill out the service record count values in the returned packet */
- ResponsePacket.TotalServiceRecordCount = SwapEndian_16(AddedServiceHandles);
- ResponsePacket.CurrentServiceRecordCount = ResponsePacket.TotalServiceRecordCount;
-
- /* Calculate the total parameter length that is to be sent, including the fixed return parameters, the created service
- handle list and the SDP continuation state */
- uint16_t ParamLength = (ResponsePacket.CurrentServiceRecordCount << 2) +
- sizeof(ResponsePacket.CurrentServiceRecordCount) +
- sizeof(ResponsePacket.TotalServiceRecordCount) +
- sizeof(uint8_t);
-
- /* Fill in the response packet's header */
- ResponsePacket.SDPHeader.PDU = SDP_PDU_SERVICESEARCHRESPONSE;
- ResponsePacket.SDPHeader.TransactionID = SDPHeader->TransactionID;
- ResponsePacket.SDPHeader.ParameterLength = SwapEndian_16(ParamLength);
-
- BT_SDP_DEBUG(1, ">> Service Search Response");
-
- /* Send the completed response packet to the sender */
- Bluetooth_SendPacket(&ResponsePacket, (sizeof(ResponsePacket.SDPHeader) + ParamLength), Channel);
-}
-
-/** Internal processing routine for SDP Service Attribute Requests.
- *
- * \param[in] SDPHeader Pointer to the start of the issued SDP request
- * \param[in] Channel Pointer to the Bluetooth channel structure the request was issued to
- */
-static void SDP_ProcessServiceAttribute(const SDP_PDUHeader_t* const SDPHeader, Bluetooth_Channel_t* const Channel)
-{
- const void* CurrentParameter = ((void*)SDPHeader + sizeof(SDP_PDUHeader_t));
-
- BT_SDP_DEBUG(1, "<< Service Attribute");
-
- /* Retrieve the service handle whose attributes are to be examined */
- uint32_t ServiceHandle = SDP_ReadData32(&CurrentParameter);
- BT_SDP_DEBUG(2, "-- Service Handle: 0x%08lX", ServiceHandle);
-
- /* Retrieve the maximum Attribute reponse size from the request */
- uint16_t MaxAttributeSize = SDP_ReadData16(&CurrentParameter);
- BT_SDP_DEBUG(2, "-- Max Return Attribute Bytes: 0x%04X", MaxAttributeSize);
-
- /* Retrieve the list of Attributes from the request */
- uint16_t AttributeList[8][2];
- uint8_t TotalAttributes = SDP_GetAttributeList(AttributeList, &CurrentParameter);
- BT_SDP_DEBUG(2, "-- Total Attributes: %d", TotalAttributes);
-
- struct
- {
- SDP_PDUHeader_t SDPHeader;
- uint16_t AttributeListByteCount;
- uint8_t ResponseData[100];
- } ResponsePacket;
-
- /* Create a pointer to the buffer to indicate the current location for response data to be added */
- void* CurrResponsePos = ResponsePacket.ResponseData;
-
- /* Clamp the maximum attribute size to the size of the allocated buffer */
- if (MaxAttributeSize > sizeof(ResponsePacket.ResponseData))
- MaxAttributeSize = sizeof(ResponsePacket.ResponseData);
-
- uint16_t TotalResponseSize = 0;
-
- /* Search through the global UUID list an item at a time */
- for (uint8_t CurrTableItem = 0; CurrTableItem < (sizeof(SDP_Services_Table) / sizeof(void*)); CurrTableItem++)
- {
- /* Read in a pointer to the current UUID table entry's Attribute table */
- ServiceAttributeTable_t* CurrAttributeTable = pgm_read_ptr(&SDP_Services_Table[CurrTableItem]);
-
- /* Retrieve a PROGMEM pointer to the value of the Service Record Handle */
- const void* ServiceRecord = SDP_GetAttributeValue(CurrAttributeTable, SDP_ATTRIBUTE_ID_SERVICERECORDHANDLE);
-
- /* Get the size of the header for the Service Record Handle */
- uint8_t AttrHeaderSize;
- SDP_GetLocalAttributeContainerSize(ServiceRecord, &AttrHeaderSize);
-
- /* Retrieve the endian-swapped service handle of the current service being examined */
- uint32_t CurrServiceHandle = SwapEndian_32(pgm_read_dword(ServiceRecord + AttrHeaderSize));
-
- /* Check if the current service in the service table has the requested service handle */
- if (ServiceHandle == CurrServiceHandle)
- {
- /* Add the listed attributes for the found UUID to the response */
- TotalResponseSize = SDP_AddListedAttributesToResponse(CurrAttributeTable, AttributeList, TotalAttributes,
- &CurrResponsePos);
-
- /* Requested service found, abort the search through the service table */
- break;
- }
- }
-
- /* Continuation state - always zero */
- SDP_WriteData8(&CurrResponsePos, 0);
-
- /* Set the total response list size to the size of the outer container plus its header size and continuation state */
- ResponsePacket.AttributeListByteCount = SwapEndian_16(TotalResponseSize);
-
- /* Calculate the total parameter length that is to be sent, including the fixed return parameters, the created attribute
- value list and the SDP continuation state */
- uint16_t ParamLength = (sizeof(ResponsePacket.AttributeListByteCount) + TotalResponseSize + sizeof(uint8_t));
-
- /* Fill in the response packet's header */
- ResponsePacket.SDPHeader.PDU = SDP_PDU_SERVICEATTRIBUTERESPONSE;
- ResponsePacket.SDPHeader.TransactionID = SDPHeader->TransactionID;
- ResponsePacket.SDPHeader.ParameterLength = SwapEndian_16(ParamLength);
-
- BT_SDP_DEBUG(1, ">> Service Attribute Response");
- BT_SDP_DEBUG(2, "-- Param Len 0x%04X", ParamLength);
-
- /* Send the completed response packet to the sender */
- Bluetooth_SendPacket(&ResponsePacket, (sizeof(ResponsePacket.SDPHeader) + ParamLength), Channel);
-}
-
-/** Internal processing routine for SDP Service Search Attribute Requests.
- *
- * \param[in] SDPHeader Pointer to the start of the issued SDP request
- * \param[in] Channel Pointer to the Bluetooth channel structure the request was issued to
- */
-static void SDP_ProcessServiceSearchAttribute(const SDP_PDUHeader_t* const SDPHeader, Bluetooth_Channel_t* const Channel)
-{
- const void* CurrentParameter = ((void*)SDPHeader + sizeof(SDP_PDUHeader_t));
-
- BT_SDP_DEBUG(1, "<< Service Search Attribute");
-
- /* Retrieve the list of search UUIDs from the request */
- uint8_t UUIDList[12][UUID_SIZE_BYTES];
- uint8_t TotalUUIDs = SDP_GetUUIDList(UUIDList, &CurrentParameter);
- BT_SDP_DEBUG(2, "-- Total UUIDs: %d", TotalUUIDs);
-
- /* Retrieve the maximum Attribute reponse size from the request */
- uint16_t MaxAttributeSize = SDP_ReadData16(&CurrentParameter);
- BT_SDP_DEBUG(2, "-- Max Return Attribute Bytes: 0x%04X", MaxAttributeSize);
-
- /* Retrieve the list of Attributes from the request */
- uint16_t AttributeList[8][2];
- uint8_t TotalAttributes = SDP_GetAttributeList(AttributeList, &CurrentParameter);
- BT_SDP_DEBUG(2, "-- Total Attributes: %d", TotalAttributes);
-
- struct
- {
- SDP_PDUHeader_t SDPHeader;
- uint16_t AttributeListByteCount;
- uint8_t ResponseData[100];
- } ResponsePacket;
-
- /* Create a pointer to the buffer to indicate the current location for response data to be added */
- void* CurrResponsePos = ResponsePacket.ResponseData;
-
- /* Clamp the maximum attribute size to the size of the allocated buffer */
- if (MaxAttributeSize > sizeof(ResponsePacket.ResponseData))
- MaxAttributeSize = sizeof(ResponsePacket.ResponseData);
-
- /* Add the outer Data Element Sequence header for all of the retrieved Attributes */
- uint16_t* TotalResponseSize = SDP_AddSequence16(&CurrResponsePos);
-
- /* Search through the global service list an item at a time */
- for (uint8_t CurrTableItem = 0; CurrTableItem < (sizeof(SDP_Services_Table) / sizeof(void*)); CurrTableItem++)
- {
- /* Read in a pointer to the current UUID table entry's Attribute table */
- ServiceAttributeTable_t* CurrAttributeTable = pgm_read_ptr(&SDP_Services_Table[CurrTableItem]);
-
- if (!(SDP_SearchServiceTable(UUIDList, TotalUUIDs, CurrAttributeTable)))
- continue;
-
- BT_SDP_DEBUG(2, " -- Found search match in table");
-
- /* Add the listed attributes for the found UUID to the response */
- *TotalResponseSize += SDP_AddListedAttributesToResponse(CurrAttributeTable, AttributeList, TotalAttributes,
- &CurrResponsePos);
- }
-
- /* Continuation state - always zero */
- SDP_WriteData8(&CurrResponsePos, 0);
-
- /* Set the total response list size to the size of the outer container plus its header size and continuation state */
- ResponsePacket.AttributeListByteCount = SwapEndian_16(3 + *TotalResponseSize);
-
- /* Calculate the total parameter length that is to be sent, including the fixed return parameters, the created attribute
- value list and the SDP continuation state */
- uint16_t ParamLength = (sizeof(ResponsePacket.AttributeListByteCount) +
- (3 + *TotalResponseSize) +
- sizeof(uint8_t));
-
- /* Flip the endianness of the container's size */
- *TotalResponseSize = SwapEndian_16(*TotalResponseSize);
-
- /* Fill in the response packet's header */
- ResponsePacket.SDPHeader.PDU = SDP_PDU_SERVICESEARCHATTRIBUTERESPONSE;
- ResponsePacket.SDPHeader.TransactionID = SDPHeader->TransactionID;
- ResponsePacket.SDPHeader.ParameterLength = SwapEndian_16(ParamLength);
-
- BT_SDP_DEBUG(1, ">> Service Search Attribute Response");
- BT_SDP_DEBUG(2, "-- Param Len 0x%04X", ParamLength);
-
- /* Send the completed response packet to the sender */
- Bluetooth_SendPacket(&ResponsePacket, (sizeof(ResponsePacket.SDPHeader) + ParamLength), Channel);
-}
-
-/** Adds all the Attributes in the given service table to the response that appear in the Attribute table.
- *
- * \param[in] AttributeTable Pointer to an Attribute table for the service to examine
- * \param[in] AttributeList Pointer to a list of Attribute ranges
- * \param[in] TotalAttributes Number of Attributes stored in the Attribute list
- * \param[out] BufferPos Pointer to the output buffer position where the retrieved attributes are to be stored
- *
- * \return Number of bytes added to the output buffer
- */
-static uint16_t SDP_AddListedAttributesToResponse(const ServiceAttributeTable_t* AttributeTable, uint16_t AttributeList[][2],
- const uint8_t TotalAttributes, void** const BufferPos)
-{
- uint16_t TotalResponseSize;
-
- /* Add an inner Data Element Sequence header for the current services's found Attributes */
- uint16_t* AttributeListSize = SDP_AddSequence16(BufferPos);
-
- /* Search through the list of Attributes one at a time looking for values in the current UUID's Attribute table */
- for (uint8_t CurrAttribute = 0; CurrAttribute < TotalAttributes; CurrAttribute++)
- {
- uint16_t* AttributeIDRange = AttributeList[CurrAttribute];
- void* AttributeValue;
-
- /* Look through the current service's attribute list, examining all the attributes */
- while ((AttributeValue = pgm_read_ptr(&AttributeTable->Data)) != NULL)
- {
- /* Get the current Attribute's ID from the current attribute table entry */
- uint16_t CurrAttributeID = pgm_read_word(&AttributeTable->AttributeID);
-
- /* Check if the current Attribute's ID is within the current Attribute range */
- if ((CurrAttributeID >= AttributeIDRange[0]) && (CurrAttributeID <= AttributeIDRange[1]))
- {
- /* Increment the current UUID's returned Attribute container size by the number of added bytes */
- *AttributeListSize += SDP_AddAttributeToResponse(CurrAttributeID, AttributeValue, BufferPos);
- }
-
- AttributeTable++;
- }
- }
-
- /* Record the total number of added bytes to the buffer */
- TotalResponseSize = 3 + *AttributeListSize;
-
- /* Fix endianness of the added attribute data element sequence */
- *AttributeListSize = SwapEndian_16(*AttributeListSize);
-
- return TotalResponseSize;
-}
-
-/** Adds the given attribute ID and value to the reponse buffer, and advances the response buffer pointer past the added data.
- *
- * \param[in] AttributeID Attribute ID to add to the response buffer
- * \param[in] AttributeValue Pointer to the start of the Attribute's value, located in PROGMEM
- * \param[in, out] ResponseBuffer Pointer to a buffer where the Attribute and Attribute Value is to be added
- *
- * \return Number of bytes added to the response buffer
- */
-static uint16_t SDP_AddAttributeToResponse(const uint16_t AttributeID, const void* AttributeValue, void** ResponseBuffer)
-{
- /* Retrieve the size of the attribute value from its container header */
- uint8_t AttributeHeaderLength;
- uint16_t AttributeValueLength = SDP_GetLocalAttributeContainerSize(AttributeValue, &AttributeHeaderLength);
-
- BT_SDP_DEBUG(2, " -- Add Attribute (0x%04X) 0x%04X", (AttributeHeaderLength + AttributeValueLength), AttributeID);
-
- /* Add a Data Element header to the response for the Attribute ID */
- SDP_WriteData8(ResponseBuffer, (SDP_DATATYPE_UnsignedInt | SDP_DATASIZE_16Bit));
-
- /* Add the Attribute ID to the created Data Element */
- SDP_WriteData16(ResponseBuffer, AttributeID);
-
- /* Copy over the Attribute value Data Element container to the response */
- memcpy_P(*ResponseBuffer, AttributeValue, AttributeHeaderLength + AttributeValueLength);
- *ResponseBuffer += AttributeHeaderLength + AttributeValueLength;
-
- return (sizeof(uint8_t) + sizeof(uint16_t) + AttributeHeaderLength + AttributeValueLength);
-}
-
-/** Retrieves a pointer to the value of the given Attribute ID from the given Attribute table.
- *
- * \param[in] AttributeTable Pointer to the Attribute table to search in
- * \param[in] AttributeID Attribute ID to search for within the table
- *
- * \return Pointer to the start of the Attribute's value if found within the table, NULL otherwise
- */
-static void* SDP_GetAttributeValue(const ServiceAttributeTable_t* AttributeTable, const uint16_t AttributeID)
-{
- void* CurrTableItemData;
-
- /* Search through the current Attribute table, abort when the terminator item has been reached */
- while ((CurrTableItemData = pgm_read_ptr(&AttributeTable->Data)) != NULL)
- {
- /* Check if the current Attribute ID matches the search ID - if so return a pointer to it */
- if (pgm_read_word(&AttributeTable->AttributeID) == AttributeID)
- return CurrTableItemData;
-
- AttributeTable++;
- }
-
- return NULL;
-}
-
-/** Retrieves the Attribute table for the given UUID list if it exists.
- *
- * \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)
-{
- bool UUIDMatch[TotalUUIDs];
-
- /* Set all the match flags to false (not matched) before starting the search */
- memset(UUIDMatch, false, sizeof(UUIDMatch));
-
- const void* CurrAttribute;
-
- /* 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, UUIDMatch, CurrAttribute);
- CurrAttributeTable++;
- }
-
- /* Determine how many UUID matches in the list we have found */
- uint8_t UUIDMatches = 0;
- for (uint8_t i = 0; i < TotalUUIDs; i++)
- {
- if (UUIDMatch[i])
- UUIDMatches++;
- }
-
- /* If all UUIDs have been matched to the current service, return true */
- return (UUIDMatches == TotalUUIDs);
-}
-
-/** Recursively upwraps 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] UUIDMatch 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, bool UUIDMatch[],
- 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)
- {
- /* 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 (!(UUIDMatch[i]) && !(memcmp_P(UUIDList[i], (CurrAttribute + 1), UUID_SIZE_BYTES)))
- {
- /* Indicate match found for the current attribute UUID and early-abort */
- UUIDMatch[i] = true;
- break;
- }
- }
- }
- 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);
-
- SDP_CheckUUIDMatch(UUIDList, TotalUUIDs, UUIDMatch, CurrAttribute);
-
- 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;
-}
projects / pub / lufa.git / blobdiff