#define INCLUDE_FROM_SERVICEDISCOVERYPROTOCOL_C
#include "ServiceDiscoveryProtocol.h"
-/** Service Discovery Protocol attribute, indicationg the service's name. */
-const struct
-{
- uint8_t Header;
- uint8_t Length;
- uint8_t Data[];
-} PROGMEM SDP_Attribute_Name = {(SDP_DATATYPE_String | 5), sizeof("SDP"), "SDP"};
-
-/** Service Discovery Protocol attribute, indicationg the service's description. */
-const struct
-{
- uint8_t Header;
- uint8_t Length;
- uint8_t Data[];
-} PROGMEM SDP_Attribute_Description = {(SDP_DATATYPE_String | 5), sizeof("BT Service Discovery"), "BT Service Discovery"};
-
-/** Service Discovery Protocol attribute, indicationg the service's availability. */
+/** Service Discovery Protocol attribute, indicating the service's availability. */
const struct
{
uint8_t Header;
uint8_t Data;
-} PROGMEM SDP_Attribute_Availability = {(SDP_DATATYPE_UnsignedInt | 0), 0xFF};
+} PROGMEM SDP_Attribute_Availability = {(SDP_DATATYPE_UnsignedInt | SDP_DATASIZE_8Bit), 0xFF};
const struct
{
uint8_t Header;
- uint16_t Data;
-} PROGMEM SDP_Attribute_LanguageOffset = {(SDP_DATATYPE_UnsignedInt | 1), SDP_ATTRIBUTE_LANGOFFSET};
+ uint32_t Data;
+} PROGMEM SDP_Attribute_ServiceHandle = {(SDP_DATATYPE_UnsignedInt | SDP_DATASIZE_32Bit), 0x00010000};
const struct
{
- uint8_t Header;
- uint16_t Data;
-} PROGMEM SDP_Attribute_ServiceHandle = {(SDP_DATATYPE_UnsignedInt | 1), 0x0001};
+ 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;
- uint8_t Size;
+ uint16_t Size;
ClassUUID_t UUIDList[];
} PROGMEM SDP_Attribute_ServiceClassIDs =
{
- (SDP_DATATYPE_Sequence | 5), (sizeof(ClassUUID_t) * 1),
- {
- {.Header = (SDP_DATATYPE_UUID | 5), .Size = UUID_SIZE_BYTES, .UUID = {BASE_96BIT_UUID, 0x01, 0x00, 0x00, 0x00}}
- }
+ .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. */
{
{.AttributeID = SDP_ATTRIBUTE_ID_SERVICERECORDHANDLE, .Data = &SDP_Attribute_ServiceHandle },
{.AttributeID = SDP_ATTRIBUTE_ID_SERVICECLASSIDS, .Data = &SDP_Attribute_ServiceClassIDs },
- {.AttributeID = SDP_ATTRIBUTE_ID_LANGIDOFFSET, .Data = &SDP_Attribute_LanguageOffset },
- {.AttributeID = SDP_ATTRIBUTE_ID_NAME, .Data = &SDP_Attribute_Name },
- {.AttributeID = SDP_ATTRIBUTE_ID_DESCRIPTION, .Data = &SDP_Attribute_Description },
+ {.AttributeID = SDP_ATTRIBUTE_ID_VERSION, .Data = &SDP_Attribute_Version },
SERVICE_ATTRIBUTE_TABLE_TERMINATOR
};
const ServiceTable_t SDP_Services_Table[] PROGMEM =
{
{ // 128-bit UUID for the SDP service
- .UUID = {BASE_96BIT_UUID, 0x01, 0x00, 0x00, 0x00},
+ .UUID = {BASE_96BIT_UUID, 0x00, 0x00, 0x00, 0x01},
.AttributeTable = SDP_Attribute_Table,
},
-#if 0
- { // 128-bit UUID for the RFCOMM service
- .UUID = {BASE_96BIT_UUID, 0x03, 0x00, 0x00, 0x00},
- .AttributeTable = RFCOMM_Attribute_Table,
- },
-#endif
};
/** Base UUID value common to all standardized Bluetooth services */
} ResponsePacket;
/* Create a pointer to the buffer to indicate the current location for response data to be added */
- uint8_t* CurrResponsePos = ResponsePacket.ResponseData;
+ 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 the retrieved Attributes */
+ /* 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 */
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);
/* If the Attribute does not exist in the current UUID's Attribute table, continue to the next Attribute ID */
if (AttributeValue == NULL)
continue;
-
- /* Retrieve the size of the attribute value from its container header */
- uint32_t AttributeValueLength = SDP_GetLocalAttributeContainerSize(AttributeValue);
+
BT_SDP_DEBUG(2, " -- Add Attribute 0x%04X", CurrAttributeID);
- /* Add a Data Element header to the response for the Attribute ID */
- *((uint8_t*)CurrResponsePos) = (1 | SDP_DATATYPE_UnsignedInt);
- CurrResponsePos += sizeof(uint8_t);
-
- /* Add the Attribute ID to the created Data Element */
- *((uint16_t*)CurrResponsePos) = CurrAttributeID;
- CurrResponsePos += sizeof(uint16_t);
-
- /* Copy over the Attribute value Data Element container to the response */
- memcpy_P(CurrResponsePos, AttributeValue, AttributeValueLength);
- CurrResponsePos += AttributeValueLength;
-
/* Increment the current UUID's returned Attribute container size by the number of added bytes */
- *CurrentUUIDResponseSize += sizeof(uint8_t) + sizeof(uint16_t) + AttributeValueLength;
+ *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 */
- ResponsePacket.AttributeListByteCount = 3 + *TotalResponseSize;
+ /* 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;
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
/* 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 (ServiceAttributeTable_t*)pgm_read_word(&SDP_Services_Table[CurrTableItem].AttributeTable);
+ 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;
*
* \return Size in bytes of the entire attribute container, including the header
*/
-static uint32_t SDP_GetLocalAttributeContainerSize(const void* const AttributeData)
+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 5:
- return (1 + sizeof(uint8_t)) + pgm_read_byte(AttributeData + 1);
- case 6:
- return (1 + sizeof(uint16_t)) + pgm_read_word(AttributeData + 1);
- case 7:
- return (1 + sizeof(uint32_t)) + pgm_read_dword(AttributeData + 1);
+ 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:
- return (1 + (1 << SizeIndex));
+ *HeaderSize = 1;
+ return (1 << SizeIndex);
}
return 0;
/* Convert the Data Element size index into a size in bytes */
switch (SizeIndex)
{
- case 5:
+ case SDP_DATASIZE_Variable8Bit:
ElementValue = *((uint8_t*)*DataElementHeader);
*DataElementHeader += sizeof(uint8_t);
*ElementHeaderSize = (1 + sizeof(uint8_t));
break;
- case 6:
+ case SDP_DATASIZE_Variable16Bit:
ElementValue = *((uint16_t*)*DataElementHeader);
*DataElementHeader += sizeof(uint16_t);
*ElementHeaderSize = (1 + sizeof(uint16_t));
break;
- case 7:
+ case SDP_DATASIZE_Variable32Bit:
ElementValue = *((uint32_t*)*DataElementHeader);
*DataElementHeader += sizeof(uint32_t);
*ElementHeaderSize = (1 + sizeof(uint32_t));
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