{
/* Reset the RFCOMM channel structures, to invalidate any confiured RFCOMM channels */
for (uint8_t i = 0; i < RFCOMM_MAX_OPEN_CHANNELS; i++)
- RFCOMM_Channels[i].DLCI = 0x00;
+ RFCOMM_Channels[i].State = RFCOMM_Channel_Closed;
}
void RFCOMM_ProcessPacket(void* Data, Bluetooth_Channel_t* const Channel)
{
const RFCOMM_Header_t* FrameHeader = (const RFCOMM_Header_t*)Data;
const uint8_t* FrameData = (const uint8_t*)Data + sizeof(RFCOMM_Header_t);
- uint16_t FrameDataLen = RFCOMM_GetFrameDataLength(FrameData);
-
- /* Adjust the frame data pointer to skip over the variable size field */
- FrameData += (FrameDataLen < 128) ? 1 : 2;
+ uint16_t FrameDataLen = RFCOMM_GetVariableFieldValue(&FrameData);
/* Decode the RFCOMM frame type from the header */
switch (FrameHeader->Control & ~FRAME_POLL_FINAL)
}
}
-static void RFCOMM_ProcessDM(const RFCOMM_Address_t* const FrameAddress, Bluetooth_Channel_t* const Channel)
-{
- BT_RFCOMM_DEBUG(1, "<< DM Received");
- BT_RFCOMM_DEBUG(2, "-- DLCI 0x%02X", FrameAddress->DLCI);
-}
-
-static void RFCOMM_ProcessDISC(const RFCOMM_Address_t* const FrameAddress, Bluetooth_Channel_t* const Channel)
-{
- BT_RFCOMM_DEBUG(1, "<< DISC Received");
- BT_RFCOMM_DEBUG(2, "-- DLCI 0x%02X", FrameAddress->DLCI);
-
- // TODO: Close down connection
-
- BT_RFCOMM_DEBUG(1, ">> UA Sent");
- RFCOMM_SendFrame(FrameAddress->DLCI, true, (RFCOMM_Frame_UA | FRAME_POLL_FINAL), 0, NULL, Channel);
-}
-
-static void RFCOMM_ProcessSABM(const RFCOMM_Address_t* const FrameAddress, Bluetooth_Channel_t* const Channel)
+RFCOMM_Channel_t* RFCOMM_GetChannelData(const uint8_t DLCI)
{
- BT_RFCOMM_DEBUG(1, "<< SABM Received");
- BT_RFCOMM_DEBUG(2, "-- DLCI 0x%02X", FrameAddress->DLCI);
-
- /* Find a free entry in the RFCOMM channel multiplexer state array */
+ /* Search through the RFCOMM channel list, looking for the specified channel */
for (uint8_t i = 0; i < RFCOMM_MAX_OPEN_CHANNELS; i++)
{
RFCOMM_Channel_t* CurrRFCOMMChannel = &RFCOMM_Channels[i];
- /* If the channel's DLCI is zero, the channel state entry is free */
- if (!(CurrRFCOMMChannel->DLCI))
- {
- CurrRFCOMMChannel->DLCI = FrameAddress->DLCI;
- CurrRFCOMMChannel->Configured = false;
-
- BT_RFCOMM_DEBUG(1, ">> UA Sent");
- RFCOMM_SendFrame(FrameAddress->DLCI, true, (RFCOMM_Frame_UA | FRAME_POLL_FINAL), 0, NULL, Channel);
- return;
- }
+ /* If the current non-closed channel's DLCI matches the search DLCI, return it to the caller */
+ if ((CurrRFCOMMChannel->DLCI == DLCI) && (CurrRFCOMMChannel->State != RFCOMM_Channel_Closed))
+ return CurrRFCOMMChannel;
}
- BT_RFCOMM_DEBUG(1, ">> DM Sent");
-
- /* No free channel in the multiplexer - decline the SABM by sending a DM frame */
- RFCOMM_SendFrame(FrameAddress->DLCI, true, (RFCOMM_Frame_DM | FRAME_POLL_FINAL), 0, NULL, Channel);
+ /* Channel not found in the channel state table, return failure */
+ return NULL;
}
-static void RFCOMM_ProcessUA(const RFCOMM_Address_t* const FrameAddress, Bluetooth_Channel_t* const Channel)
+uint16_t RFCOMM_GetVariableFieldValue(const uint8_t** BufferPos)
{
- BT_RFCOMM_DEBUG(1, "<< UA Received");
- BT_RFCOMM_DEBUG(2, "-- DLCI 0x%02X", FrameAddress->DLCI);
-}
-
-static void RFCOMM_ProcessUIH(const RFCOMM_Address_t* const FrameAddress, const uint16_t FrameLength,
- const uint8_t* FrameData, Bluetooth_Channel_t* const Channel)
-{
- BT_RFCOMM_DEBUG(1, "<< UIH Received");
- BT_RFCOMM_DEBUG(2, "-- DLCI 0x%02X", FrameAddress->DLCI);
- BT_RFCOMM_DEBUG(2, "-- Length 0x%02X", FrameLength);
+ uint8_t FirstOctet;
+ uint8_t SecondOctet = 0;
- if (FrameAddress->DLCI == RFCOMM_CONTROL_DLCI)
- {
- RFCOMM_ProcessControlCommand(FrameData, Channel);
- return;
- }
-
- // TODO: Handle regular channel data here
-}
-
-static void RFCOMM_ProcessControlCommand(const uint8_t* Command, Bluetooth_Channel_t* const Channel)
-{
- const RFCOMM_Command_t* CommandHeader = (const RFCOMM_Command_t*)Command;
- const uint8_t* CommandData = (const uint8_t*)Command + sizeof(RFCOMM_Command_t);
-
- switch (CommandHeader->Command)
+ FirstOctet = **BufferPos;
+ (*BufferPos)++;
+
+ /* If the field size is more than a single byte, fetch the next byte in the variable length field */
+ if (!(FirstOctet & 0x01))
{
- case RFCOMM_Control_Test:
- BT_RFCOMM_DEBUG(1, "<< TEST Command");
- break;
- case RFCOMM_Control_FlowControlEnable:
- BT_RFCOMM_DEBUG(1, "<< FCE Command");
- break;
- case RFCOMM_Control_FlowControlDisable:
- BT_RFCOMM_DEBUG(1, "<< FCD Command");
- break;
- case RFCOMM_Control_ModemStatus:
- BT_RFCOMM_DEBUG(1, "<< MS Command");
- break;
- case RFCOMM_Control_RemotePortNegotiation:
- BT_RFCOMM_DEBUG(1, "<< RPN Command");
- break;
- case RFCOMM_Control_RemoteLineStatus:
- BT_RFCOMM_DEBUG(1, "<< RLS Command");
- break;
- case RFCOMM_Control_DLCParameterNegotiation:
- BT_RFCOMM_DEBUG(1, "<< DPN Command");
+ SecondOctet = **BufferPos;
+ (*BufferPos)++;
- // TODO - Set channel state
-// RFCOMM_Channel_t* RFCOMMChannel = RFCOMM_GetChannelData(
-// RFCOMMChannel->Configured = true;
-
- // TODO - send ACK/NAK response
- break;
- default:
- BT_RFCOMM_DEBUG(1, "<< Unknown Command");
-
- struct
- {
- RFCOMM_Command_t Header;
- RFCOMM_Command_t Command;
- } Response =
- {
- .Header = (RFCOMM_Command_t)
- {
- .Command = RFCOMM_Control_NonSupportedCommand,
- .CR = true,
- .EA = true,
- },
-
- .Command = *CommandHeader,
- };
-
- RFCOMM_SendFrame(RFCOMM_CONTROL_DLCI, false, RFCOMM_Frame_UIH, sizeof(RFCOMM_Command_t), &Response, Channel);
- break;
+ /* Discard any remaining bytes in the variable length field that won't fit in the return value */
+ while (!(**BufferPos & 0x01))
+ (*BufferPos)++;
}
+
+ /* Bitshift the bytes that comprise the variable length field so that they form a single integer */
+ return (((uint16_t)SecondOctet << 7) | FirstOctet >> 1);
}
-static void RFCOMM_SendFrame(const uint8_t DLCI, const bool CommandResponse, const uint8_t Control, const uint16_t DataLen,
- const void* Data, Bluetooth_Channel_t* const Channel)
+void RFCOMM_SendFrame(const uint8_t DLCI, const bool CommandResponse, const uint8_t Control, const uint16_t DataLen,
+ const void* Data, Bluetooth_Channel_t* const Channel)
{
struct
{
return ~FCS;
}
-static uint16_t RFCOMM_GetFrameDataLength(const uint8_t* const BufferPos)
+static void RFCOMM_ProcessDM(const RFCOMM_Address_t* const FrameAddress, Bluetooth_Channel_t* const Channel)
{
- uint8_t FirstOctet = BufferPos[0];
- uint8_t SecondOctet = 0;
-
- if (!(FirstOctet & 0x01))
- SecondOctet = BufferPos[1];
+ BT_RFCOMM_DEBUG(1, "<< DM Received");
+ BT_RFCOMM_DEBUG(2, "-- DLCI 0x%02X", FrameAddress->DLCI);
+}
+
+static void RFCOMM_ProcessDISC(const RFCOMM_Address_t* const FrameAddress, Bluetooth_Channel_t* const Channel)
+{
+ BT_RFCOMM_DEBUG(1, "<< DISC Received");
+ BT_RFCOMM_DEBUG(2, "-- DLCI 0x%02X", FrameAddress->DLCI);
+
+ RFCOMM_Channel_t* RFCOMMChannel = RFCOMM_GetChannelData(FrameAddress->DLCI);
- return (((uint16_t)SecondOctet << 7) | FirstOctet >> 1);
+ /* If the requested channel is currently open, destroy it */
+ if (RFCOMMChannel != NULL)
+ RFCOMMChannel->DLCI = 0x00;
+
+ BT_RFCOMM_DEBUG(1, ">> UA Sent");
+ RFCOMM_SendFrame(FrameAddress->DLCI, true, (RFCOMM_Frame_UA | FRAME_POLL_FINAL), 0, NULL, Channel);
}
-RFCOMM_Channel_t* RFCOMM_GetChannelData(const uint8_t DLCI)
+static void RFCOMM_ProcessSABM(const RFCOMM_Address_t* const FrameAddress, Bluetooth_Channel_t* const Channel)
{
+ BT_RFCOMM_DEBUG(1, "<< SABM Received");
+ BT_RFCOMM_DEBUG(2, "-- DLCI 0x%02X", FrameAddress->DLCI);
+
+ /* Find a free entry in the RFCOMM channel multiplexer state array */
for (uint8_t i = 0; i < RFCOMM_MAX_OPEN_CHANNELS; i++)
{
RFCOMM_Channel_t* CurrRFCOMMChannel = &RFCOMM_Channels[i];
- if (CurrRFCOMMChannel->DLCI == DLCI)
- return CurrRFCOMMChannel;
+ /* If the channel's DLCI is zero, the channel state entry is free */
+ if (!(CurrRFCOMMChannel->DLCI))
+ {
+ CurrRFCOMMChannel->DLCI = FrameAddress->DLCI;
+ CurrRFCOMMChannel->State = RFCOMM_Channel_Open;
+ CurrRFCOMMChannel->Priority = 7 + (CurrRFCOMMChannel->DLCI >> 3) + ((CurrRFCOMMChannel->DLCI >> 3) * 7);
+ CurrRFCOMMChannel->MTU = 0xFFFF;
+ CurrRFCOMMChannel->Remote.Signals = 0 | (1 << 0);
+ CurrRFCOMMChannel->Remote.BreakSignal = 0 | (1 << 0);
+ CurrRFCOMMChannel->Local.Signals = RFCOMM_SIGNAL_RTC | RFCOMM_SIGNAL_RTR | RFCOMM_SIGNAL_DV | (1 << 0);
+ CurrRFCOMMChannel->Local.BreakSignal = 0 | (1 << 0);
+
+ BT_RFCOMM_DEBUG(1, ">> UA Sent");
+ RFCOMM_SendFrame(FrameAddress->DLCI, true, (RFCOMM_Frame_UA | FRAME_POLL_FINAL), 0, NULL, Channel);
+ return;
+ }
}
+
+ BT_RFCOMM_DEBUG(1, ">> DM Sent");
+
+ /* No free channel in the multiplexer - decline the SABM by sending a DM frame */
+ RFCOMM_SendFrame(FrameAddress->DLCI, true, (RFCOMM_Frame_DM | FRAME_POLL_FINAL), 0, NULL, Channel);
+}
+
+static void RFCOMM_ProcessUA(const RFCOMM_Address_t* const FrameAddress, Bluetooth_Channel_t* const Channel)
+{
+ BT_RFCOMM_DEBUG(1, "<< UA Received");
+ BT_RFCOMM_DEBUG(2, "-- DLCI 0x%02X", FrameAddress->DLCI);
+}
+
+static void RFCOMM_ProcessUIH(const RFCOMM_Address_t* const FrameAddress, const uint16_t FrameLength,
+ const uint8_t* FrameData, Bluetooth_Channel_t* const Channel)
+{
+ if (FrameAddress->DLCI == RFCOMM_CONTROL_DLCI)
+ {
+ RFCOMM_ProcessControlCommand(FrameData, Channel);
+ return;
+ }
+
+ BT_RFCOMM_DEBUG(1, "<< UIH Received");
+ BT_RFCOMM_DEBUG(2, "-- DLCI 0x%02X", FrameAddress->DLCI);
+ BT_RFCOMM_DEBUG(2, "-- Length 0x%02X", FrameLength);
+
+ puts("RFCOMM Data: ");
- return NULL;
+ for (uint8_t i = 0; i < FrameLength; i++)
+ printf("0x%02X (%c) ", FrameData[i], FrameData[i]);
+
+ printf("\r\n");
}
projects / pub / USBasp.git / blobdiff