-/*\r
- LUFA Library\r
- Copyright (C) Dean Camera, 2010.\r
- \r
- dean [at] fourwalledcubicle [dot] com\r
- www.fourwalledcubicle.com\r
-*/\r
-\r
-/*\r
- Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)\r
-\r
- Permission to use, copy, modify, distribute, and sell this \r
- software and its documentation for any purpose is hereby granted\r
- without fee, provided that the above copyright notice appear in \r
- all copies and that both that the copyright notice and this\r
- permission notice and warranty disclaimer appear in supporting \r
- documentation, and that the name of the author not be used in \r
- advertising or publicity pertaining to distribution of the \r
- software without specific, written prior permission.\r
-\r
- The author disclaim all warranties with regard to this\r
- software, including all implied warranties of merchantability\r
- and fitness. In no event shall the author be liable for any\r
- special, indirect or consequential damages or any damages\r
- whatsoever resulting from loss of use, data or profits, whether\r
- in an action of contract, negligence or other tortious action,\r
- arising out of or in connection with the use or performance of\r
- this software.\r
-*/\r
-\r
-#define INCLUDE_FROM_SERVICEDISCOVERYPROTOCOL_C\r
-#include "ServiceDiscoveryProtocol.h"\r
-\r
-SERVICE_ATTRIBUTE_TEXT(SDP_Attribute_Name, "SDP");\r
-SERVICE_ATTRIBUTE_TEXT(SDP_Attribute_Description, "BT Service Discovery");\r
-SERVICE_ATTRIBUTE_8BIT_LEN(SDP_Attribute_Availability, SDP_DATATYPE_UNSIGNED_INT, 1, {0xFF});\r
-const ServiceAttributeTable_t SDP_Attribute_Table[] PROGMEM =\r
- {\r
- {.AttributeID = SDP_ATTRIBUTE_NAME , .AttributeData = &SDP_Attribute_Name},\r
- {.AttributeID = SDP_ATTRIBUTE_DESCRIPTION , .AttributeData = &SDP_Attribute_Description},\r
- {.AttributeID = SDP_ATTRIBUTE_AVAILABILITY, .AttributeData = &SDP_Attribute_Availability},\r
- {.AttributeData = NULL}\r
- };\r
-\r
-SERVICE_ATTRIBUTE_TEXT(RFCOMM_Attribute_Name, "RFCOMM");\r
-SERVICE_ATTRIBUTE_TEXT(RFCOMM_Attribute_Description, "Virtual Serial");\r
-SERVICE_ATTRIBUTE_8BIT_LEN(RFCOMM_Attribute_Availability, SDP_DATATYPE_UNSIGNED_INT, 1, {0xFF});\r
-const ServiceAttributeTable_t RFCOMM_Attribute_Table[] PROGMEM =\r
- {\r
- {.AttributeID = SDP_ATTRIBUTE_NAME , .AttributeData = &RFCOMM_Attribute_Name},\r
- {.AttributeID = SDP_ATTRIBUTE_DESCRIPTION , .AttributeData = &RFCOMM_Attribute_Description},\r
- {.AttributeID = SDP_ATTRIBUTE_AVAILABILITY, .AttributeData = &RFCOMM_Attribute_Availability},\r
- {.AttributeData = NULL}\r
- };\r
- \r
-const ServiceTable_t SDP_Services_Table[] =\r
- {\r
- { // 128-bit UUID for the SDP service\r
- .UUID = {BASE_96BIT_UUID, 0x01, 0x00, 0x00, 0x00},\r
- .AttributeTable = &SDP_Attribute_Table,\r
- },\r
- { // 128-bit UUID for the RFCOMM service\r
- .UUID = {BASE_96BIT_UUID, 0x03, 0x00, 0x00, 0x00},\r
- .AttributeTable = &RFCOMM_Attribute_Table,\r
- },\r
- };\r
-\r
-\r
-void ServiceDiscovery_ProcessPacket(void* Data, Bluetooth_Channel_t* Channel)\r
-{\r
- SDP_PDUHeader_t* SDPHeader = (SDP_PDUHeader_t*)Data;\r
- SDPHeader->ParameterLength = SwapEndian_16(SDPHeader->ParameterLength);\r
-\r
- BT_SDP_DEBUG(1, "SDP Packet Received", NULL);\r
- BT_SDP_DEBUG(2, "-- PDU ID: 0x%02X", SDPHeader->PDU);\r
- BT_SDP_DEBUG(2, "-- Param Length: 0x%04X", SDPHeader->ParameterLength);\r
-\r
- switch (SDPHeader->PDU)\r
- {\r
- case SDP_PDU_SERVICESEARCHREQUEST:\r
- ServiceDiscovery_ProcessServiceSearch(SDPHeader);\r
- break; \r
- case SDP_PDU_SERVICEATTRIBUTEREQUEST:\r
- ServiceDiscovery_ProcessServiceAttribute(SDPHeader);\r
- break;\r
- case SDP_PDU_SERVICESEARCHATTRIBUTEREQUEST:\r
- ServiceDiscovery_ProcessServiceSearchAttribute(SDPHeader);\r
- break;\r
- }\r
-}\r
-\r
-static void ServiceDiscovery_ProcessServiceSearch(SDP_PDUHeader_t* SDPHeader)\r
-{\r
- BT_SDP_DEBUG(1, "<< Service Search", NULL);\r
-}\r
-\r
-static void ServiceDiscovery_ProcessServiceAttribute(SDP_PDUHeader_t* SDPHeader)\r
-{\r
- BT_SDP_DEBUG(1, "<< Service Attribute", NULL);\r
-}\r
-\r
-static void ServiceDiscovery_ProcessServiceSearchAttribute(SDP_PDUHeader_t* SDPHeader)\r
-{\r
- void* CurrentParameter = ((void*)SDPHeader + sizeof(SDP_PDUHeader_t));\r
- \r
- BT_SDP_DEBUG(1, "<< Service Search Attribute", NULL);\r
- \r
- uint8_t ElementHeaderSize;\r
-\r
- uint16_t ServicePatternLength = ServiceDiscovery_GetDataElementSize(&CurrentParameter, &ElementHeaderSize);\r
- BT_SDP_DEBUG(2, "-- Total UUID Length: 0x%04X", ServicePatternLength);\r
- while (ServicePatternLength)\r
- {\r
- uint8_t UUIDLength = ServiceDiscovery_GetDataElementSize(&CurrentParameter, &ElementHeaderSize);\r
- uint8_t UUID[16] = {BASE_96BIT_UUID, 0x00, 0x00, 0x00, 0x00};\r
-\r
- if (UUIDLength <= 32)\r
- memcpy(&UUID[sizeof(UUID) - sizeof(uint32_t)], CurrentParameter, UUIDLength);\r
- else\r
- memcpy(UUID, CurrentParameter, UUIDLength);\r
- \r
- CurrentParameter += UUIDLength;\r
- \r
- BT_SDP_DEBUG(2, "-- UUID (%d): 0x%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X",\r
- UUIDLength,\r
- UUID[15], UUID[14], UUID[13], UUID[12], UUID[11], UUID[10], UUID[9], UUID[8],\r
- UUID[7], UUID[6], UUID[5], UUID[4], UUID[3], UUID[2], UUID[1], UUID[0]);\r
- \r
- ServicePatternLength -= (UUIDLength + ElementHeaderSize);\r
- }\r
- \r
- uint16_t MaxAttributeSize = ServiceDiscovery_Read16BitParameter(&CurrentParameter);\r
- BT_SDP_DEBUG(2, "-- Max Return Attribute Bytes: 0x%04X", MaxAttributeSize);\r
-\r
- uint16_t AttributeIDListLength = ServiceDiscovery_GetDataElementSize(&CurrentParameter, &ElementHeaderSize);\r
- BT_SDP_DEBUG(2, "-- Total Attribute Length: 0x%04X", AttributeIDListLength);\r
- while (AttributeIDListLength)\r
- {\r
- uint8_t AttributeLength = ServiceDiscovery_GetDataElementSize(&CurrentParameter, &ElementHeaderSize);\r
- uint32_t Attribute = 0;\r
- \r
- memcpy(&Attribute, CurrentParameter, AttributeLength);\r
- CurrentParameter += AttributeLength;\r
- \r
- BT_SDP_DEBUG(2, "-- Attribute(%d): 0x%08lX", AttributeLength, Attribute);\r
- \r
- AttributeIDListLength -= (AttributeLength + ElementHeaderSize);\r
- }\r
-}\r
-\r
-static uint32_t ServiceDiscovery_GetDataElementSize(void** DataElementHeader, uint8_t* ElementHeaderSize)\r
-{\r
- uint8_t SizeIndex = (*((uint8_t*)*DataElementHeader) & 0x07);\r
- *DataElementHeader += sizeof(uint8_t);\r
- \r
- *ElementHeaderSize = 1;\r
- \r
- uint32_t ElementValue;\r
- \r
- switch (SizeIndex)\r
- {\r
- case 0:\r
- ElementValue = 1;\r
- break;\r
- case 1:\r
- ElementValue = 2;\r
- break;\r
- case 2:\r
- ElementValue = 4;\r
- break;\r
- case 3:\r
- ElementValue = 8;\r
- break;\r
- case 4:\r
- ElementValue = 16;\r
- break;\r
- case 5:\r
- ElementValue = *((uint8_t*)*DataElementHeader);\r
- *DataElementHeader += sizeof(uint8_t);\r
- *ElementHeaderSize = (1 + sizeof(uint8_t));\r
- break;\r
- case 6:\r
- ElementValue = *((uint16_t*)*DataElementHeader);\r
- *DataElementHeader += sizeof(uint16_t);\r
- *ElementHeaderSize = (1 + sizeof(uint16_t));\r
- break;\r
- default:\r
- ElementValue = *((uint32_t*)*DataElementHeader);\r
- *DataElementHeader += sizeof(uint32_t);\r
- *ElementHeaderSize = (1 + sizeof(uint32_t));\r
- break;\r
- }\r
- \r
- return ElementValue;\r
-}\r
+/*
+ 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 / USBasp.git / blobdiff