-/*\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.
+*/
+
+#define INCLUDE_FROM_SERVICEDISCOVERYPROTOCOL_C
+#include "ServiceDiscoveryProtocol.h"
+
+/** Service Discovery Protocol attribute, indicating the service's availability. */
+const struct
+{
+ uint8_t Header;
+ uint8_t Data;
+} PROGMEM SDP_Attribute_Availability = {(SDP_DATATYPE_UnsignedInt | SDP_DATASIZE_8Bit), 0xFF};
+
+const struct
+{
+ uint8_t Header;
+ uint32_t Data;
+} PROGMEM SDP_Attribute_ServiceHandle = {(SDP_DATATYPE_UnsignedInt | SDP_DATASIZE_32Bit), 0x00010000};
+
+const struct
+{
+ uint8_t Header;
+ uint8_t Size;
+ Version_t VersionList[];
+} PROGMEM SDP_Attribute_Version =
+ {
+ .Header = (SDP_DATATYPE_Sequence | SDP_DATASIZE_Variable8Bit),
+ .Size = (sizeof(Version_t) * 1),
+ .VersionList =
+ {
+ {.Header = (SDP_DATATYPE_UnsignedInt | SDP_DATASIZE_16Bit), .Version = 0x0100}
+ }
+ };
+
+const struct
+{
+ uint8_t Header;
+ uint16_t Size;
+ ClassUUID_t UUIDList[];
+} PROGMEM SDP_Attribute_ServiceClassIDs =
+ {
+ .Header = (SDP_DATATYPE_Sequence | SDP_DATASIZE_Variable16Bit),
+ .Size = (sizeof(ClassUUID_t) * 1),
+ .UUIDList =
+ {
+ {.Header = (SDP_DATATYPE_UUID | SDP_DATASIZE_128Bit), .UUID = {BASE_96BIT_UUID, 0x01, 0x00, 0x00, 0x00}}
+ }
+ };
+
+/** Service Discovery Protocol attribute table, listing all supported attributes of the service. */
+const ServiceAttributeTable_t SDP_Attribute_Table[] PROGMEM =
+ {
+ {.AttributeID = SDP_ATTRIBUTE_ID_SERVICERECORDHANDLE, .Data = &SDP_Attribute_ServiceHandle },
+ {.AttributeID = SDP_ATTRIBUTE_ID_SERVICECLASSIDS, .Data = &SDP_Attribute_ServiceClassIDs },
+ {.AttributeID = SDP_ATTRIBUTE_ID_VERSION, .Data = &SDP_Attribute_Version },
+
+ SERVICE_ATTRIBUTE_TABLE_TERMINATOR
+ };
+
+/** Master service table, listing all supported services (and their attribute tables) of the device, including
+ * each service's UUID.
+ */
+const ServiceTable_t SDP_Services_Table[] PROGMEM =
+ {
+ { // 128-bit UUID for the SDP service
+ .UUID = {BASE_96BIT_UUID, 0x00, 0x00, 0x00, 0x01},
+ .AttributeTable = SDP_Attribute_Table,
+ },
+ };
+
+/** Base UUID value common to all standardized Bluetooth services */
+const uint8_t BaseUUID[] PROGMEM = {BASE_96BIT_UUID, 0x00, 0x00, 0x00, 0x00};
+
+
+/** 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* 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);
+
+ 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)
+{
+ BT_SDP_DEBUG(1, "<< Service Search");
+}
+
+/** 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)
+{
+ BT_SDP_DEBUG(1, "<< Service Attribute");
+}
+
+/** 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 = *((uint16_t*)CurrentParameter);
+ CurrentParameter += sizeof(uint16_t);
+ BT_SDP_DEBUG(2, "-- Max Return Attribute Bytes: 0x%04X", MaxAttributeSize);
+
+ /* Retrieve the list of Attributes from the request */
+ uint16_t AttributeList[15][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_AddDataElementHeader16(&CurrResponsePos, SDP_DATATYPE_Sequence);
+
+ /* Search through the list of UUIDs one at a time looking for matching search Attributes */
+ for (uint8_t CurrUUIDItem = 0; CurrUUIDItem < TotalUUIDs; CurrUUIDItem++)
+ {
+ /* Retrieve the attribute table of the current search UUID from the global UUID table if it exists */
+ ServiceAttributeTable_t* AttributeTable = SDP_GetAttributeTable(UUIDList[CurrUUIDItem]);
+
+ /* If the UUID does not exist in the global UUID table, continue on to the next search UUID */
+ if (AttributeTable == NULL)
+ continue;
+
+ BT_SDP_DEBUG(2, " -- Found UUID %d in table", CurrUUIDItem);
+
+ /* Add an inner Data Element Sequence header for the current UUID's found Attributes */
+ uint16_t* CurrentUUIDResponseSize = SDP_AddDataElementHeader16(&CurrResponsePos, SDP_DATATYPE_Sequence);
+
+ /* 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];
+
+ /* Look in the current Attribute Range for a matching Attribute ID in the UUID's Attribute table */
+ for (uint32_t CurrAttributeID = AttributeIDRange[0]; CurrAttributeID <= AttributeIDRange[1]; CurrAttributeID++)
+ {
+ /* Retrieve a PROGMEM pointer to the value of the current Attribute ID, if it exists in the UUID's Attribute table */
+ const void* AttributeValue = SDP_GetAttributeValue(AttributeTable, CurrAttributeID);
+
+ /* If the Attribute does not exist in the current UUID's Attribute table, continue to the next Attribute ID */
+ if (AttributeValue == NULL)
+ continue;
+
+ BT_SDP_DEBUG(2, " -- Add Attribute 0x%04X", CurrAttributeID);
+
+ /* Increment the current UUID's returned Attribute container size by the number of added bytes */
+ *CurrentUUIDResponseSize += SDP_AddAttributeToResponse(CurrAttributeID, AttributeValue, &CurrResponsePos);
+ }
+
+ /* Increment the outer container size by the number of added bytes */
+ *TotalResponseSize += 3 + *CurrentUUIDResponseSize;
+ }
+ }
+
+ /* Continuation state - always zero */
+ *((uint8_t*)CurrResponsePos) = 0;
+
+ /* Set the total response list size to the size of the outer container plus its header size and continuation state */
+ ResponsePacket.AttributeListByteCount = 4 + *TotalResponseSize;
+
+ /* Fill in the response packet's header */
+ ResponsePacket.SDPHeader.PDU = SDP_PDU_SERVICESEARCHATTRIBUTERESPONSE;
+ ResponsePacket.SDPHeader.TransactionID = SDPHeader->TransactionID;
+ ResponsePacket.SDPHeader.ParameterLength = (ResponsePacket.AttributeListByteCount + sizeof(ResponsePacket.AttributeListByteCount));
+
+ BT_SDP_DEBUG(1, ">> Service Search Attribute Response");
+ BT_SDP_DEBUG(2, "-- Total Parameter Length: 0x%04X", ResponsePacket.SDPHeader.ParameterLength);
+
+ /* Send the completed response packet to the sender */
+ Bluetooth_SendPacket(&ResponsePacket, (sizeof(ResponsePacket.SDPHeader) + ResponsePacket.SDPHeader.ParameterLength),
+ Channel);
+}
+
+/** 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;
+ uint32_t AttributeValueLength = SDP_GetLocalAttributeContainerSize(AttributeValue, &AttributeHeaderLength);
+
+ /* Add a Data Element header to the response for the Attribute ID */
+ *((uint8_t*)*ResponseBuffer) = (SDP_DATATYPE_UnsignedInt | SDP_DATASIZE_16Bit);
+ *ResponseBuffer += sizeof(uint8_t);
+
+ /* Add the Attribute ID to the created Data Element */
+ *((uint16_t*)*ResponseBuffer) = AttributeID;
+ *ResponseBuffer += sizeof(uint16_t);
+
+ /* 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 = (void*)pgm_read_word(&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 if it exists.
+ *
+ * \param[in] UUID UUID to search for
+ *
+ * \return Pointer to the UUID's associated Attribute table if found in the global UUID table, NULL otherwise
+ */
+static ServiceAttributeTable_t* SDP_GetAttributeTable(const uint8_t* const UUID)
+{
+ /* Search through the global UUID list an item at a time */
+ for (uint8_t CurrTableItem = 0; CurrTableItem < (sizeof(SDP_Services_Table) / sizeof(ServiceTable_t)); CurrTableItem++)
+ {
+ /* Read in a pointer to the current UUID table entry's Attribute table */
+ ServiceAttributeTable_t* CurrAttributeTable = (ServiceAttributeTable_t*)pgm_read_word(&SDP_Services_Table[CurrTableItem].AttributeTable);
+
+ /* If the current table item's UUID matches the search UUID, return a pointer the table item's Attribute table */
+ if (!(memcmp_P(UUID, SDP_Services_Table[CurrTableItem].UUID, UUID_SIZE_BYTES)))
+ return CurrAttributeTable;
+
+ /* Retrieve the list of the service's Class UUIDs from its Attribute table */
+ void* ClassUUIDs = SDP_GetAttributeValue(CurrAttributeTable, SDP_ATTRIBUTE_ID_SERVICECLASSIDS);
+
+ /* Go to the next UUID in the table if the current item does not have a list of Class UUIDs */
+ if (ClassUUIDs == NULL)
+ continue;
+
+ /* Retrieve the size of the Class UUID list and skip past the header to the first Class UUID in the list */
+ uint8_t ClassUUIDListHeaderSize;
+ uint32_t ClassUUIDListSize = SDP_GetLocalAttributeContainerSize(ClassUUIDs, &ClassUUIDListHeaderSize);
+ ClassUUIDs += ClassUUIDListHeaderSize;
+
+ /* Check each class UUID in turn for a match */
+ while (ClassUUIDListSize)
+ {
+ /* Current Service UUID's Class UUID list has a matching entry, return the Attribute table */
+ if (!(memcmp_P(UUID, &((ClassUUID_t*)ClassUUIDs)->UUID, UUID_SIZE_BYTES)))
+ return CurrAttributeTable;
+
+ ClassUUIDListSize -= sizeof(ClassUUID_t);
+ ClassUUIDs += sizeof(ClassUUID_t);
+ }
+ }
+
+ return NULL;
+}
+
+/** 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)
+ memcpy(&CurrentAttributeRange[1], *CurrentParameter, 2);
+
+ 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 the base UUID value to the free UUID slot in the list */
+ memcpy_P(CurrentUUID, BaseUUID, sizeof(BaseUUID));
+
+ /* Copy over UUID from the container to the free slot - if a short UUID (<= 4 bytes) it replaces the lower
+ 4 bytes of the base UUID, otherwise it replaces the UUID completely */
+ memcpy(&CurrentUUID[(UUIDLength <= 4) ? (UUID_SIZE_BYTES - 4) : 0], *CurrentParameter, UUIDLength);
+
+ BT_SDP_DEBUG(2, "-- UUID (%d): 0x%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X",
+ UUIDLength,
+ CurrentUUID[15], CurrentUUID[14], CurrentUUID[13], CurrentUUID[12],
+ CurrentUUID[11], CurrentUUID[10], CurrentUUID[9], CurrentUUID[8],
+ CurrentUUID[7], CurrentUUID[6], CurrentUUID[5], CurrentUUID[4],
+ CurrentUUID[3], CurrentUUID[2], CurrentUUID[1], CurrentUUID[0]);
+
+ 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
+ *
+ * \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);
+
+ /* Convert the Data Element size index into a size in bytes */
+ switch (SizeIndex)
+ {
+ case SDP_DATASIZE_Variable8Bit:
+ *HeaderSize = (1 + sizeof(uint8_t));
+ return pgm_read_byte(AttributeData + 1);
+ case SDP_DATASIZE_Variable16Bit:
+ *HeaderSize = (1 + sizeof(uint16_t));
+ return pgm_read_word(AttributeData + 1);
+ case SDP_DATASIZE_Variable32Bit:
+ *HeaderSize = (1 + sizeof(uint32_t));
+ return pgm_read_dword(AttributeData + 1);
+ default:
+ *HeaderSize = 1;
+ return (1 << SizeIndex);
+ }
+
+ return 0;
+}
+
+/** 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 = (*((uint8_t*)*DataElementHeader) & 0x07);
+ *DataElementHeader += sizeof(uint8_t);
+
+ uint32_t ElementValue;
+
+ /* Convert the Data Element size index into a size in bytes */
+ switch (SizeIndex)
+ {
+ case SDP_DATASIZE_Variable8Bit:
+ ElementValue = *((uint8_t*)*DataElementHeader);
+ *DataElementHeader += sizeof(uint8_t);
+ *ElementHeaderSize = (1 + sizeof(uint8_t));
+ break;
+ case SDP_DATASIZE_Variable16Bit:
+ ElementValue = *((uint16_t*)*DataElementHeader);
+ *DataElementHeader += sizeof(uint16_t);
+ *ElementHeaderSize = (1 + sizeof(uint16_t));
+ break;
+ case SDP_DATASIZE_Variable32Bit:
+ ElementValue = *((uint32_t*)*DataElementHeader);
+ *DataElementHeader += sizeof(uint32_t);
+ *ElementHeaderSize = (1 + sizeof(uint32_t));
+ break;
+ default:
+ ElementValue = (1 << SizeIndex);
+ *ElementHeaderSize = 1;
+ break;
+ }
+
+ return ElementValue;
+}
projects / pub / USBasp.git / blobdiff