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@ -61,10 +61,16 @@ const uint8_t CRC8_Table[256] PROGMEM =
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0xB4, 0x25, 0x57, 0xC6, 0xB3, 0x22, 0x50, 0xC1, 0xBA, 0x2B, 0x59, 0xC8, 0xBD, 0x2C, 0x5E, 0xCF
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0xB4, 0x25, 0x57, 0xC6, 0xB3, 0x22, 0x50, 0xC1, 0xBA, 0x2B, 0x59, 0xC8, 0xBD, 0x2C, 0x5E, 0xCF
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};
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};
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/** RFCOMM channel state structure, to retain information about each open channel in the RFCOMM multiplexer. */
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RFCOMM_Channel_t RFCOMM_Channels[RFCOMM_MAX_OPEN_CHANNELS];
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/** Initializes the RFCOMM service, ready for new connections from a SDP client. */
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/** Initializes the RFCOMM service, ready for new connections from a SDP client. */
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void RFCOMM_Initialize(void)
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void RFCOMM_Initialize(void)
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{
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{
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/* Not currently used */
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/* Reset the RFCOMM channel structures, to invalidate any confiured RFCOMM channels */
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for (uint8_t i = 0; i < RFCOMM_MAX_OPEN_CHANNELS; i++)
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RFCOMM_Channels[i].DLCI = 0x00;
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}
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}
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void RFCOMM_ProcessPacket(void* Data, Bluetooth_Channel_t* const Channel)
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void RFCOMM_ProcessPacket(void* Data, Bluetooth_Channel_t* const Channel)
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@ -122,10 +128,27 @@ static void RFCOMM_ProcessSABM(const RFCOMM_Address_t* const FrameAddress, Bluet
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BT_RFCOMM_DEBUG(1, "<< SABM Received");
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BT_RFCOMM_DEBUG(1, "<< SABM Received");
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BT_RFCOMM_DEBUG(2, "-- DLCI 0x%02X", FrameAddress->DLCI);
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BT_RFCOMM_DEBUG(2, "-- DLCI 0x%02X", FrameAddress->DLCI);
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// TODO: Reset channel send/receive state
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/* Find a free entry in the RFCOMM channel multiplexer state array */
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for (uint8_t i = 0; i < RFCOMM_MAX_OPEN_CHANNELS; i++)
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{
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RFCOMM_Channel_t* CurrRFCOMMChannel = RFCOMM_Channels[i];
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BT_RFCOMM_DEBUG(1, ">> UA Sent");
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/* If the channel's DLCI is zero, the channel state entry is free */
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RFCOMM_SendFrame(FrameAddress->DLCI, true, (RFCOMM_Frame_UA | FRAME_POLL_FINAL), 0, NULL, Channel);
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if (!(CurrRFCOMMChannel->DLCI))
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{
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CurrRFCOMMChannel->DLCI = FrameAddress->DLCI;
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CurrRFCOMMChannel->Configured = false;
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BT_RFCOMM_DEBUG(1, ">> UA Sent");
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RFCOMM_SendFrame(FrameAddress->DLCI, true, (RFCOMM_Frame_UA | FRAME_POLL_FINAL), 0, NULL, Channel);
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return;
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}
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}
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BT_RFCOMM_DEBUG(1, ">> DM Sent");
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/* No free channel in the multiplexer - decline the SABM by sending a DM frame */
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RFCOMM_SendFrame(FrameAddress->DLCI, true, (RFCOMM_Frame_DM | FRAME_POLL_FINAL), 0, NULL, Channel);
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}
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}
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static void RFCOMM_ProcessUA(const RFCOMM_Address_t* const FrameAddress, Bluetooth_Channel_t* const Channel)
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static void RFCOMM_ProcessUA(const RFCOMM_Address_t* const FrameAddress, Bluetooth_Channel_t* const Channel)
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@ -152,6 +175,8 @@ static void RFCOMM_ProcessUIH(const RFCOMM_Address_t* const FrameAddress, const
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static void RFCOMM_ProcessControlCommand(const RFCOMM_Command_t* CommandHeader, Bluetooth_Channel_t* const Channel)
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static void RFCOMM_ProcessControlCommand(const RFCOMM_Command_t* CommandHeader, Bluetooth_Channel_t* const Channel)
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{
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{
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const uint8_t* CommandData = (const uint8_t*)Data + sizeof(RFCOMM_Command_t);
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switch (CommandHeader->Command)
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switch (CommandHeader->Command)
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{
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{
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case RFCOMM_Control_Test:
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case RFCOMM_Control_Test:
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@ -175,6 +200,15 @@ static void RFCOMM_ProcessControlCommand(const RFCOMM_Command_t* CommandHeader,
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case RFCOMM_Control_DLCParameterNegotiation:
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case RFCOMM_Control_DLCParameterNegotiation:
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BT_RFCOMM_DEBUG(1, "<< DPN Command");
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BT_RFCOMM_DEBUG(1, "<< DPN Command");
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// TODO - Set channel state
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// RFCOMM_Channel_t* RFCOMMChannel = RFCOMM_GetChannelData(
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RFCOMMChannel->Configured = true;
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// TODO - send ACK/NAK response
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break;
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default:
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BT_RFCOMM_DEBUG(1, "<< Unknown Command");
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struct
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struct
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{
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{
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RFCOMM_Command_t Header;
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RFCOMM_Command_t Header;
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@ -193,8 +227,6 @@ static void RFCOMM_ProcessControlCommand(const RFCOMM_Command_t* CommandHeader,
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RFCOMM_SendFrame(RFCOMM_CONTROL_DLCI, false, RFCOMM_Frame_UIH, sizeof(RFCOMM_Command_t), &Response, Channel);
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RFCOMM_SendFrame(RFCOMM_CONTROL_DLCI, false, RFCOMM_Frame_UIH, sizeof(RFCOMM_Command_t), &Response, Channel);
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break;
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break;
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default:
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BT_RFCOMM_DEBUG(1, "<< Unknown Command");
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}
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}
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}
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}
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@ -233,6 +265,7 @@ static void RFCOMM_SendFrame(const uint8_t DLCI, const bool CommandResponse, con
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/* Determine the length of the frame which is to be used to calculate the CRC value */
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/* Determine the length of the frame which is to be used to calculate the CRC value */
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uint8_t CRCLength = sizeof(ResponsePacket.FrameHeader);
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uint8_t CRCLength = sizeof(ResponsePacket.FrameHeader);
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/* UIH frames do not have the CRC calculated on the Size field in the response, all other frames do */
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if ((Control & ~FRAME_POLL_FINAL) != RFCOMM_Frame_UIH)
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if ((Control & ~FRAME_POLL_FINAL) != RFCOMM_Frame_UIH)
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CRCLength += sizeof(ResponsePacket.Size);
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CRCLength += sizeof(ResponsePacket.Size);
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@ -264,3 +297,15 @@ static uint16_t RFCOMM_GetFrameDataLength(const uint8_t* const BufferPos)
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return (((uint16_t)SecondOctet << 7) | FirstOctet >> 1);
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return (((uint16_t)SecondOctet << 7) | FirstOctet >> 1);
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}
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}
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RFCOMM_Channel_t RFCOMM_GetChannelData(const uint8_t DLCI)
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{
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for (uint8_t i = 0; i < RFCOMM_MAX_OPEN_CHANNELS; i++)
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{
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RFCOMM_Channel_t* CurrRFCOMMChannel = RFCOMM_Channels[i];
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if (CurrRFCOMMChannel->DLCI == DLCI)
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return CurrRFCOMMChannel;
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}
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return NULL;
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}
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