Demos/Host/Incomplete/BluetoothHost/Lib/ServiceDiscoveryProtocol.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2010.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, distribute, and sell this
  13   software and its documentation for any purpose is hereby granted
  14   without fee, provided that the above copyright notice appear in
  15   all copies and that both that the copyright notice and this
  16   permission notice and warranty disclaimer appear in supporting
  17   documentation, and that the name of the author not be used in
  18   advertising or publicity pertaining to distribution of the
  19   software without specific, written prior permission.
  20
  21   The author disclaim all warranties with regard to this
  22   software, including all implied warranties of merchantability
  23   and fitness.  In no event shall the author be liable for any
  24   special, indirect or consequential damages or any damages
  25   whatsoever resulting from loss of use, data or profits, whether
  26   in an action of contract, negligence or other tortious action,
  27   arising out of or in connection with the use or performance of
  28   this software.
  29 */
  30
  31 #define  INCLUDE_FROM_SERVICEDISCOVERYPROTOCOL_C
  32 #include "ServiceDiscoveryProtocol.h"
  33
  34 void ServiceDiscovery_ProcessPacket(void* Data, Bluetooth_Channel_t* Channel)
  35 {
  36         SDP_PDUHeader_t* SDPHeader = (SDP_PDUHeader_t*)Data;
  37         SDPHeader->ParameterLength = SwapEndian_16(SDPHeader->ParameterLength);
  38
  39         BT_SDP_DEBUG(1, "SDP Packet Received", NULL);
  40         BT_SDP_DEBUG(2, "-- PDU ID: 0x%02X", SDPHeader->PDU);
  41         BT_SDP_DEBUG(2, "-- Param Length: 0x%04X", SDPHeader->ParameterLength);
  42
  43         printf("\r\n");
  44         for (uint8_t i = 0; i < SDPHeader->ParameterLength; i++)
  45           printf("0x%02X ", *((uint8_t*)Data + sizeof(SDP_PDUHeader_t) + i));
  46         printf("\r\n");
  47
  48         switch (SDPHeader->PDU)
  49         {
  50                 case SDP_PDU_SERVICESEARCHREQUEST:
  51                         ServiceDiscovery_ProcessServiceSearch(SDPHeader);
  52                         break;
  53                 case SDP_PDU_SERVICEATTRIBUTEREQUEST:
  54                         ServiceDiscovery_ProcessServiceAttribute(SDPHeader);
  55                         break;
  56                 case SDP_PDU_SERVICESEARCHATTRIBUTEREQUEST:
  57                         ServiceDiscovery_ProcessServiceSearchAttribute(SDPHeader);
  58                         break;
  59         }
  60 }
  61
  62 static void ServiceDiscovery_ProcessServiceSearch(SDP_PDUHeader_t* SDPHeader)
  63 {
  64         BT_SDP_DEBUG(1, "<< Service Search", NULL);
  65 }
  66
  67 static void ServiceDiscovery_ProcessServiceAttribute(SDP_PDUHeader_t* SDPHeader)
  68 {
  69         BT_SDP_DEBUG(1, "<< Service Attribute", NULL);
  70 }
  71
  72 static void ServiceDiscovery_ProcessServiceSearchAttribute(SDP_PDUHeader_t* SDPHeader)
  73 {
  74         void* CurrentParameter = ((void*)SDPHeader + sizeof(SDP_PDUHeader_t));
  75
  76         BT_SDP_DEBUG(1, "<< Service Search Attribute", NULL);
  77
  78         uint8_t ElementHeaderSize;
  79
  80         uint16_t ServicePatternLength = ServiceDiscovery_GetDataElementSize(&CurrentParameter, &ElementHeaderSize);
  81         BT_SDP_DEBUG(2, "-- Total UUID Length: 0x%04X", ServicePatternLength);
  82         while (ServicePatternLength)
  83         {
  84                 uint8_t UUIDLength = ServiceDiscovery_GetDataElementSize(&CurrentParameter, &ElementHeaderSize);
  85                 uint8_t UUID[16];
  86
  87                 memset(UUID, 0x00, sizeof(UUID));
  88                 memcpy(UUID, CurrentParameter, UUIDLength);
  89                 CurrentParameter += UUIDLength;
  90
  91                 BT_SDP_DEBUG(2, "-- UUID (%d): 0x%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X",
  92                                                 UUIDLength,
  93                                 UUID[15], UUID[14], UUID[13], UUID[12], UUID[11], UUID[10], UUID[9], UUID[8],
  94                                                 UUID[7],  UUID[6],  UUID[5],  UUID[4],  UUID[3],  UUID[2],  UUID[1], UUID[0]);
  95
  96                 ServicePatternLength -= (UUIDLength + ElementHeaderSize);
  97         }
  98
  99         uint16_t MaxAttributeSize = ServiceDiscovery_Read16BitParameter(&CurrentParameter);
 100         BT_SDP_DEBUG(2, "-- Max Return Attribute Bytes: 0x%04X", MaxAttributeSize);
 101
 102         uint16_t AttributeIDListLength = ServiceDiscovery_GetDataElementSize(&CurrentParameter, &ElementHeaderSize);
 103         BT_SDP_DEBUG(2, "-- Total Attribute Length: 0x%04X", AttributeIDListLength);
 104         while (AttributeIDListLength)
 105         {
 106                 uint8_t  AttributeLength = ServiceDiscovery_GetDataElementSize(&CurrentParameter, &ElementHeaderSize);
 107                 uint32_t Attribute = 0;
 108
 109                 memcpy(&Attribute, CurrentParameter, AttributeLength);
 110                 CurrentParameter += AttributeLength;
 111
 112                 BT_SDP_DEBUG(2, "-- Attribute(%d): 0x%08lX", AttributeLength, Attribute);
 113
 114                 AttributeIDListLength -= (AttributeLength + ElementHeaderSize);
 115         }
 116 }
 117
 118 static uint32_t ServiceDiscovery_GetDataElementSize(void** DataElementHeader, uint8_t* ElementHeaderSize)
 119 {
 120         uint8_t SizeIndex = (*((uint8_t*)*DataElementHeader) & 0x07);
 121         *DataElementHeader += sizeof(uint8_t);
 122
 123         *ElementHeaderSize = 1;
 124
 125         uint32_t ElementValue;
 126
 127         switch (SizeIndex)
 128         {
 129                 case 0:
 130                         ElementValue = 1;
 131                         break;
 132                 case 1:
 133                         ElementValue = 2;
 134                         break;
 135                 case 2:
 136                         ElementValue = 4;
 137                         break;
 138                 case 3:
 139                         ElementValue = 8;
 140                         break;
 141                 case 4:
 142                         ElementValue = 16;
 143                         break;
 144                 case 5:
 145                         ElementValue = *((uint8_t*)*DataElementHeader);
 146                         *DataElementHeader += sizeof(uint8_t);
 147                         *ElementHeaderSize  = (1 + sizeof(uint8_t));
 148                         break;
 149                 case 6:
 150                         ElementValue = *((uint16_t*)*DataElementHeader);
 151                         *DataElementHeader += sizeof(uint16_t);
 152                         *ElementHeaderSize  = (1 + sizeof(uint16_t));
 153                         break;
 154                 default:
 155                         ElementValue = *((uint32_t*)*DataElementHeader);
 156                         *DataElementHeader += sizeof(uint32_t);
 157                         *ElementHeaderSize  = (1 + sizeof(uint32_t));
 158                         break;
 159         }
 160
 161         return ElementValue;
 162 }