You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
716 lines
30 KiB
716 lines
30 KiB
/*
|
|
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 "SDP.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};
|
|
|
|
/** Main Service Discovery Protocol packet processing routine. This function processes incoming 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 Incoming packet data containing the SDP request
|
|
* \param[in] Channel ACL 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 = ((const 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 response 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 = ((const 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 response 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 = ((const 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 response 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 response 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)
|
|
{
|
|
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 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] 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;
|
|
}
|