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More SDP code improvements - responses to ServiceSearchAttribute service discovery requests should now be valid, even if they do not currently return the device's services and service attributes.

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Added more documentation to the incomplete Bluetooth stack code.
pull/1469/head
Dean Camera 15 years ago
parent a883cf65dc
commit 141d94fa98
3 changed files with 142 additions and 64 deletions
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74
Demos/Host/Incomplete/BluetoothHost/Lib/BluetoothACLPackets.h
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@ -46,9 +46,13 @@
#define BT_ACL_DEBUG(l, s, ...) do { if (ACL_DEBUG_LEVEL >= l) printf_P(PSTR("(ACL) " s "\r\n"), ##__VA_ARGS__); } while (0)
#define ACL_DEBUG_LEVEL 0
/** Lowest possible channel number for L2CAP data channels */
#define BT_CHANNELNUMBER_BASEOFFSET 0x0040
/** Bluetooth specification defined channel number for signalling commands */
#define BT_CHANNEL_SIGNALING 0x0001
/** Bluetooth specification defined channel number for connectionless data */
#define BT_CHANNEL_CONNECTIONLESS 0x0002
#define BT_SIGNAL_COMMAND_REJECT 0x01
@ -82,83 +86,97 @@
#define BT_ACL_FIRST_AUTOFLUSH (1 << 13)
/* Type Defines: */
/** Bluetooth ACL header structure, common to all ACL data packets. */
typedef struct
{
uint16_t ConnectionHandle;
uint16_t DataLength;
uint16_t ConnectionHandle; /**< Unique device connection handle of the ACL packet */
uint16_t DataLength; /**< Length of the packet payload, in bytes */
} BT_ACL_Header_t;
/** Bluetooth ACL data packet header structure, for ACL packets containing L2CAP data */
typedef struct
{
uint16_t PayloadLength;
uint16_t DestinationChannel;
uint16_t PayloadLength; /**< Size of the data payload, in bytes */
uint16_t DestinationChannel; /**< Destination channel in the device the data is directed to */
} BT_DataPacket_Header_t;
/** Bluetooth signalling command header structure, for all ACL packets containing a signalling command */
typedef struct
{
uint8_t Code;
uint8_t Identifier;
uint16_t Length;
uint8_t Code; /**< Signal code, a BT_SIGNAL_* mask value */
uint8_t Identifier; /**< Unique signal command identifier to link requests and responses */
uint16_t Length; /**< Length of the signalling command data, in bytes */
} BT_Signal_Header_t;
/** Connection Request signalling command structure, for channel connection requests. */
typedef struct
{
uint16_t PSM;
uint16_t SourceChannel;
uint16_t PSM; /**< Type of data the channel will carry, a CHANNEL_PSM_* mask value */
uint16_t SourceChannel; /**< Channel source on the sending device this channel will link to */
} BT_Signal_ConnectionReq_t;
/** Connection response signalling command structure, for responses to channel connection requests. */
typedef struct
{
uint16_t DestinationChannel;
uint16_t SourceChannel;
uint16_t Result;
uint16_t Status;
uint16_t DestinationChannel; /**< Destination device channel that the connection request was processed on */
uint16_t SourceChannel; /**< Source device channel address that the connection request came from */
uint16_t Result; /**< Connection result, a BT_CONNECTION_* mask value */
uint16_t Status; /**< Status of the request if the result was set to the Pending value */
} BT_Signal_ConnectionResp_t;
/** Disconnection request signalling command structure, for channel disconnection requests. */
typedef struct
{
uint16_t DestinationChannel;
uint16_t SourceChannel;
uint16_t DestinationChannel; /**< Destination channel address which is to be disconnected */
uint16_t SourceChannel; /**< Source channel address which is to be disconnected */
} BT_Signal_DisconnectionReq_t;
/** Disconnection response signalling command structure, for responses to channel disconnection requests. */
typedef struct
{
uint16_t DestinationChannel;
uint16_t SourceChannel;
uint16_t DestinationChannel; /**< Destination channel address which was disconnected */
uint16_t SourceChannel; /**< Source channel address which was disconnected */
} BT_Signal_DisconnectionResp_t;
/** Configuration Request signalling command structure, for channel configuration requests. */
typedef struct
{
uint16_t DestinationChannel;
uint16_t Flags;
uint16_t DestinationChannel; /**< Destination channel address which is to be disconnected */
uint16_t Flags; /**< Configuration flags for the request, including command continuation */
} BT_Signal_ConfigurationReq_t;
/** Configuration Response signalling command structure, for responses to channel configuration requests. */
typedef struct
{
uint16_t SourceChannel;
uint16_t Flags;
uint16_t Result;
uint16_t SourceChannel; /**< Source channel that the configuration request was directed at */
uint16_t Flags; /**< Configuration flags for the response, including response continuation */
uint16_t Result; /**< Configuration result, a BT_CONFIGURATION_* mask value */
} BT_Signal_ConfigurationResp_t;
/** Information Request signalling command structure, for device information requests. */
typedef struct
{
uint16_t InfoType;
uint16_t InfoType; /**< Data type that is being requested, a BT_INFOREQ_* mask value */
} BT_Signal_InformationReq_t;
/** Information Response signalling command structure, for responses to information requests. */
typedef struct
{
uint16_t InfoType;
uint16_t Result;
uint16_t InfoType; /**< Data type that was requested, a BT_INFOREQ_* mask value */
uint16_t Result; /**< Result of the request, a BT_INFORMATION_* mask value */
} BT_Signal_InformationResp_t;
/** Configuration Option header structure, placed at the start of each option in a Channel Configuration
* request's options list.
*/
typedef struct
{
uint8_t Type;
uint8_t Length;
uint8_t Type; /**< Option type, a BT_CONFIG_OPTION_* mask value */
uint8_t Length; /**< Length of the option's value, in bytes */
} BT_Config_Option_Header_t;
/* Function Prototypes: */
void Bluetooth_ACLTask(void);
void Bluetooth_ACLTask(void);
#if defined(INCLUDE_FROM_BLUETOOTH_ACLPACKETS_C)
static void Bluetooth_ProcessIncommingACLPackets(void);

43
Demos/Host/Incomplete/BluetoothHost/Lib/ServiceDiscoveryProtocol.c
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@ -31,9 +31,13 @@
#define INCLUDE_FROM_SERVICEDISCOVERYPROTOCOL_C
#include "ServiceDiscoveryProtocol.h"
/** Service Discovery Protocol attribute, indicationg the service's name. */
SERVICE_ATTRIBUTE_TEXT(SDP_Attribute_Name, "SDP");
/** Service Discovery Protocol attribute, indicationg the service's description. */
SERVICE_ATTRIBUTE_TEXT(SDP_Attribute_Description, "BT Service Discovery");
SERVICE_ATTRIBUTE_LEN8(SDP_Attribute_Availability, SDP_DATATYPE_UNSIGNED_INT, 1, {0xFF});
/** Service Discovery Protocol attribute, indicationg the service's availability. */
SERVICE_ATTRIBUTE_LEN8(SDP_Attribute_Availability, SDP_DATATYPE_UnsignedInt, 1, {0xFF});
/** Service Discovery Protocol attribute table, listing all supported attributes of the service. */
const ServiceAttributeTable_t SDP_Attribute_Table[] PROGMEM =
{
{.AttributeID = SDP_ATTRIBUTE_NAME , .Data = &SDP_Attribute_Name},
@ -42,9 +46,13 @@ const ServiceAttributeTable_t SDP_Attribute_Table[] PROGMEM =
SERVICE_ATTRIBUTE_TABLE_TERMINATOR
};
/** RFCOMM Service attribute, indicationg the service's name. */
SERVICE_ATTRIBUTE_TEXT(RFCOMM_Attribute_Name, "RFCOMM");
/** RFCOMM Service attribute, indicationg the service's description. */
SERVICE_ATTRIBUTE_TEXT(RFCOMM_Attribute_Description, "Virtual Serial");
SERVICE_ATTRIBUTE_LEN8(RFCOMM_Attribute_Availability, SDP_DATATYPE_UNSIGNED_INT, 1, {0xFF});
/** RFCOMM Service attribute, indicationg the service's availability. */
SERVICE_ATTRIBUTE_LEN8(RFCOMM_Attribute_Availability, SDP_DATATYPE_UnsignedInt, 1, {0xFF});
/** RFCOMM Service attribute table, listing all supported attributes of the service. */
const ServiceAttributeTable_t RFCOMM_Attribute_Table[] PROGMEM =
{
{.AttributeID = SDP_ATTRIBUTE_NAME , .Data = &RFCOMM_Attribute_Name},
@ -53,6 +61,9 @@ const ServiceAttributeTable_t RFCOMM_Attribute_Table[] PROGMEM =
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[] =
{
{ // 128-bit UUID for the SDP service
@ -65,6 +76,7 @@ const ServiceTable_t SDP_Services_Table[] =
},
};
/* Base UUID value common to all standardized Bluetooth services */
const uint8_t BaseUUID[] = {BASE_96BIT_UUID, 0x00, 0x00, 0x00, 0x00};
@ -117,18 +129,19 @@ static void ServiceDiscovery_ProcessServiceSearchAttribute(SDP_PDUHeader_t* SDPH
struct
{
SDP_PDUHeader_t SDPHeader;
uint16_t AttributeListByteCount;
uint8_t ResponseData[100];
} ResponsePacket;
ResponsePacket.SDPHeader.PDU = SDP_PDU_SERVICESEARCHATTRIBUTERESPONSE;
ResponsePacket.SDPHeader.TransactionID = SDPHeader->TransactionID;
if (MaxAttributeSize > sizeof(ResponsePacket.ResponseData))
MaxAttributeSize = sizeof(ResponsePacket.ResponseData);
ResponsePacket.SDPHeader.ParameterLength = ServiceDiscovery_ProcessAttributes(UUIDList, TotalUUIDs,
ResponsePacket.AttributeListByteCount = ServiceDiscovery_ProcessAttributes(UUIDList, TotalUUIDs,
ResponsePacket.ResponseData,
MaxAttributeSize, &CurrentParameter);
ResponsePacket.SDPHeader.PDU = SDP_PDU_SERVICESEARCHATTRIBUTERESPONSE;
ResponsePacket.SDPHeader.TransactionID = SDPHeader->TransactionID;
ResponsePacket.SDPHeader.ParameterLength = (ResponsePacket.AttributeListByteCount + sizeof(ResponsePacket.AttributeListByteCount));
Bluetooth_SendPacket(&ResponsePacket, (sizeof(ResponsePacket.SDPHeader) + ResponsePacket.SDPHeader.ParameterLength),
Channel);
@ -137,8 +150,8 @@ static void ServiceDiscovery_ProcessServiceSearchAttribute(SDP_PDUHeader_t* SDPH
static uint8_t ServiceDiscovery_ProcessAttributes(uint8_t UUIDList[][UUID_SIZE_BYTES], const uint8_t TotalUUIDs, uint8_t* ResponseBuffer,
uint8_t MaxResponseSize, const void** CurrentParameter)
{
uint8_t ElementHeaderSize;
uint8_t TotalResponseSize = 0;
uint16_t* AttributeResponseSize = ServiceDiscovery_AddDataElementHeader(&ResponseBuffer, SDP_DATATYPE_UnsignedInt);
uint8_t ElementHeaderSize;
uint16_t AttributeIDListLength = ServiceDiscovery_GetDataElementSize(CurrentParameter, &ElementHeaderSize);
BT_SDP_DEBUG(2, "-- Total Attribute Length: 0x%04X", AttributeIDListLength);
@ -147,20 +160,18 @@ static uint8_t ServiceDiscovery_ProcessAttributes(uint8_t UUIDList[][UUID_SIZE_B
uint8_t AttributeLength = ServiceDiscovery_GetDataElementSize(CurrentParameter, &ElementHeaderSize);
uint32_t Attribute = 0;
memcpy(&Attribute, CurrentParameter, AttributeLength);
memcpy(&((char*)&Attribute)[sizeof(uint32_t) - AttributeLength], *CurrentParameter, AttributeLength);
BT_SDP_DEBUG(2, "-- Attribute(%d): 0x%08lX", AttributeLength, Attribute);
uint8_t TotalBytesAdded = ServiceDiscovery_GetAttribute(UUIDList, TotalUUIDs, Attribute, &ResponseBuffer,
MaxResponseSize);
TotalResponseSize += TotalBytesAdded;
MaxResponseSize -= TotalBytesAdded;
*AttributeResponseSize += ServiceDiscovery_GetAttribute(UUIDList, TotalUUIDs, Attribute, &ResponseBuffer,
(MaxResponseSize - *AttributeResponseSize));
AttributeIDListLength -= (AttributeLength + ElementHeaderSize);
CurrentParameter += AttributeLength;
*CurrentParameter += AttributeLength;
}
return TotalResponseSize;
return *AttributeResponseSize;
}
static uint8_t ServiceDiscovery_GetAttribute(uint8_t UUIDList[][UUID_SIZE_BYTES], const uint8_t TotalUUIDs, const uint32_t Attribute,
@ -174,7 +185,7 @@ static uint8_t ServiceDiscovery_GetAttribute(uint8_t UUIDList[][UUID_SIZE_BYTES]
{
const ServiceAttributeTable_t* AttributeTable = SDP_Services_Table[CurrTableItem].AttributeTable;
// Process attribute table
// TODO: Process attribute table
BT_SDP_DEBUG(2, "FOUND UUID IN TABLE");
break;

85
Demos/Host/Incomplete/BluetoothHost/Lib/ServiceDiscoveryProtocol.h
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@ -59,28 +59,63 @@
#define SDP_ATTRIBUTE_PROVIDER 0x0002
#define SDP_ATTRIBUTE_AVAILABILITY 0x0008
#define SDP_DATATYPE_NIL (0x00 << 3)
#define SDP_DATATYPE_UNSIGNED_INT (0x01 << 3)
#define SDP_DATATYPE_SIGNED_INT (0x02 << 3)
#define SDP_DATATYPE_UUID (0x03 << 3)
#define SDP_DATATYPE_TEXT (0x04 << 3)
#define SDP_DATATYPE_BOOLEAN (0x05 << 3)
#define SDP_DATATYPE_ELEMENT_SEQUENCE (0x06 << 3)
#define SDP_DATATYPE_ELEMENT_ALTERNATIVE (0x07 << 3)
#define SDP_DATATYPE_URL (0x08 << 3)
#define UUID_SIZE_BYTES 16
#define BASE_96BIT_UUID 0xFB, 0x34, 0x9B, 0x5F, 0x80, 0x00, 0x00, 0x80, 0x00, 0x10, 0x00, 0x00
#define SERVICE_ATTRIBUTE_TEXT(name, string) SERVICE_ATTRIBUTE_LEN8(name, SDP_DATATYPE_TEXT, sizeof(string), string)
/** Defines a service attribute as a string of characters.
*
* \param name Name of the attribute (used to identify the attribute variable only)
* \param string String of characters to associate with the attribute
*/
#define SERVICE_ATTRIBUTE_TEXT(name, string) SERVICE_ATTRIBUTE_LEN8(name, SDP_DATATYPE_String, sizeof(string), string)
/** Defines a service attribute with a contents that can fit into an 8-bit integer.
*
* \param name Name of the attribute (used to identify the attribute variable only)
* \param type Type of attribute contents, a value from the \ref ServiceDiscovery_DataTypes_t enum
* \param size Size of the data, in bytes
* \param ... Data to associate with the attribute
*/
#define SERVICE_ATTRIBUTE_LEN8(name, type, size, ...) const ServiceAttributeData8Bit_t name PROGMEM = \
{.Header = (type | 5), .Size = size, .Data = __VA_ARGS__}
/** Defines a service attribute with a contents that can fit into an 16-bit integer.
*
* \param name Name of the attribute (used to identify the attribute variable only)
* \param type Type of attribute contents, a value from the \ref ServiceDiscovery_DataTypes_t enum
* \param size Size of the data, in bytes
* \param ... Data to associate with the attribute
*/
#define SERVICE_ATTRIBUTE_LEN16(name, type, size, ...) const ServiceAttributeData16Bit_t name PROGMEM = \
{.Header = (type | 6), .Size = size, .Data = __VA_ARGS__}
/** Defines a service attribute with a contents that can fit into an 32-bit integer.
*
* \param name Name of the attribute (used to identify the attribute variable only)
* \param type Type of attribute contents, a value from the \ref ServiceDiscovery_DataTypes_t enum
* \param size Size of the data, in bytes
* \param ... Data to associate with the attribute
*/
#define SERVICE_ATTRIBUTE_LEN32(name, type, size, ...) const ServiceAttributeData32Bit_t name PROGMEM = \
{.Header = (type | 7), .Size = size, .Data = __VA_ARGS__}
/** Terminator for a service attribute table of type \ref ServiceAttributeTable_t. */
#define SERVICE_ATTRIBUTE_TABLE_TERMINATOR {.Data = NULL}
/* Enums: */
enum ServiceDiscovery_DataTypes_t
{
SDP_DATATYPE_Nill = (0 << 3),
SDP_DATATYPE_UnsignedInt = (1 << 3),
SDP_DATATYPE_SignedInt = (2 << 3),
SDP_DATATYPE_UUID = (3 << 3),
SDP_DATATYPE_String = (4 << 3),
SDP_DATATYPE_Boolean = (5 << 3),
SDP_DATATYPE_Sequence = (6 << 3),
SDP_DATATYPE_Alternative = (7 << 3),
SDP_DATATYPE_URL = (8 << 3),
};
/* Type Defines: */
typedef struct
{
@ -128,6 +163,27 @@
uint8_t Data[];
} ServiceAttributeData_t;
/* Inline Functions: */
static inline uint16_t* ServiceDiscovery_AddDataElementHeader(uint8_t** BufferPos, const uint8_t Type)
{
**BufferPos = (6 | Type);
*BufferPos += 1;
uint16_t* SizePos = (uint16_t*)*BufferPos;
*SizePos = 0;
**BufferPos += 2;
return SizePos;
}
static inline uint16_t ServiceDiscovery_Read16BitParameter(const void** AttributeHeader)
{
uint16_t ParamValue = *((uint16_t*)*AttributeHeader);
*AttributeHeader += sizeof(uint16_t);
return ParamValue;
}
/* Function Prototypes: */
void ServiceDiscovery_ProcessPacket(void* Data, Bluetooth_Channel_t* Channel);
@ -136,13 +192,6 @@
static void ServiceDiscovery_ProcessServiceAttribute(SDP_PDUHeader_t* SDPHeader, Bluetooth_Channel_t* Channel);
static void ServiceDiscovery_ProcessServiceSearchAttribute(SDP_PDUHeader_t* SDPHeader, Bluetooth_Channel_t* Channel);
static inline uint16_t ServiceDiscovery_Read16BitParameter(const void** AttributeHeader)
{
uint16_t ParamValue = *((uint16_t*)*AttributeHeader);
*AttributeHeader += sizeof(uint16_t);
return ParamValue;
}
static uint8_t ServiceDiscovery_ProcessAttributes(uint8_t UUIDList[][UUID_SIZE_BYTES], const uint8_t TotalUUIDs,
uint8_t* ResponseBuffer, uint8_t MaxResponseSize,
const void** CurrentParameter);

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