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-rw-r--r--Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMM.c44
-rw-r--r--Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMM.h7
-rw-r--r--Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMMControl.c67
-rw-r--r--Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMMControl.h17
4 files changed, 100 insertions, 35 deletions
diff --git a/Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMM.c b/Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMM.c
index 5968a6929..6634863f0 100644
--- a/Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMM.c
+++ b/Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMM.c
@@ -77,10 +77,7 @@ 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)
@@ -108,25 +105,40 @@ void RFCOMM_ProcessPacket(void* Data, Bluetooth_Channel_t* const Channel)
RFCOMM_Channel_t* RFCOMM_GetChannelData(const uint8_t DLCI)
{
+ /* 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 (CurrRFCOMMChannel->DLCI == DLCI)
+ /* 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;
}
-
+
+ /* Channel not found in the channel state table, return failure */
return NULL;
}
-uint16_t RFCOMM_GetFrameDataLength(const uint8_t* const BufferPos)
+uint16_t RFCOMM_GetVariableFieldValue(const uint8_t** BufferPos)
{
- uint8_t FirstOctet = BufferPos[0];
+ uint8_t FirstOctet;
uint8_t SecondOctet = 0;
- if (!(FirstOctet & 0x01))
- SecondOctet = BufferPos[1];
+ 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))
+ {
+ SecondOctet = **BufferPos;
+ (*BufferPos)++;
+
+ /* 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);
}
@@ -220,11 +232,13 @@ static void RFCOMM_ProcessSABM(const RFCOMM_Address_t* const FrameAddress, Bluet
/* 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->UseUIFrames = false;
- CurrRFCOMMChannel->RemoteMTU = 0xFFFF;
+ CurrRFCOMMChannel->DLCI = FrameAddress->DLCI;
+ CurrRFCOMMChannel->State = RFCOMM_Channel_Open;
+ CurrRFCOMMChannel->Priority = 7 + (CurrRFCOMMChannel->DLCI >> 3) + ((CurrRFCOMMChannel->DLCI >> 3) * 7);
+ CurrRFCOMMChannel->UseUIFrames = false;
+ CurrRFCOMMChannel->MTU = 0xFFFF;
+ CurrRFCOMMChannel->Signals = 0;
+ CurrRFCOMMChannel->BreakSignals = 0;
BT_RFCOMM_DEBUG(1, ">> UA Sent");
RFCOMM_SendFrame(FrameAddress->DLCI, true, (RFCOMM_Frame_UA | FRAME_POLL_FINAL), 0, NULL, Channel);
diff --git a/Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMM.h b/Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMM.h
index 5ccfc2d23..78e9b54e2 100644
--- a/Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMM.h
+++ b/Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMM.h
@@ -86,7 +86,10 @@
uint8_t State;
uint8_t Priority;
bool UseUIFrames;
- uint16_t RemoteMTU;
+ uint16_t MTU;
+ uint8_t StatusFlags;
+ uint8_t Signals;
+ uint8_t BreakSignals;
} RFCOMM_Channel_t;
/* External Variables: */
@@ -97,7 +100,7 @@
void RFCOMM_ProcessPacket(void* Data, Bluetooth_Channel_t* const Channel);
RFCOMM_Channel_t* RFCOMM_GetChannelData(const uint8_t DLCI);
- uint16_t RFCOMM_GetFrameDataLength(const uint8_t* const BufferPos);
+ uint16_t RFCOMM_GetVariableFieldValue(const uint8_t** BufferPos);
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);
diff --git a/Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMMControl.c b/Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMMControl.c
index 23a18765f..3a6bf67c5 100644
--- a/Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMMControl.c
+++ b/Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMMControl.c
@@ -42,10 +42,7 @@ void RFCOMM_ProcessControlCommand(const uint8_t* Command, Bluetooth_Channel_t* c
{
const RFCOMM_Command_t* CommandHeader = (const RFCOMM_Command_t*)Command;
const uint8_t* CommandData = (const uint8_t*)Command + sizeof(RFCOMM_Command_t);
- uint16_t ControlDataLen = RFCOMM_GetFrameDataLength(CommandData);
-
- /* Adjust the command data pointer to skip over the variable size field */
- CommandData += (ControlDataLen < 128) ? 1 : 2;
+ uint8_t CommandDataLen = RFCOMM_GetVariableFieldValue(&CommandData);
switch (CommandHeader->Command)
{
@@ -59,7 +56,7 @@ void RFCOMM_ProcessControlCommand(const uint8_t* Command, Bluetooth_Channel_t* c
RFCOMM_ProcessFCDCommand(CommandHeader, CommandData, Channel);
break;
case RFCOMM_Control_ModemStatus:
- RFCOMM_ProcessMSCommand(CommandHeader, CommandData, Channel);
+ RFCOMM_ProcessMSCommand(CommandHeader, CommandDataLen, CommandData, Channel);
break;
case RFCOMM_Control_RemotePortNegotiation:
RFCOMM_ProcessRPNCommand(CommandHeader, CommandData, Channel);
@@ -94,10 +91,48 @@ static void RFCOMM_ProcessFCDCommand(const RFCOMM_Command_t* const CommandHeader
BT_RFCOMM_DEBUG(1, "<< FCD Command");
}
-static void RFCOMM_ProcessMSCommand(const RFCOMM_Command_t* const CommandHeader, const uint8_t* CommandData,
- Bluetooth_Channel_t* const Channel)
+static void RFCOMM_ProcessMSCommand(const RFCOMM_Command_t* const CommandHeader, const uint8_t CommandDataLen,
+ const uint8_t* CommandData, Bluetooth_Channel_t* const Channel)
{
+ const RFCOMM_MS_Parameters_t* Params = (const RFCOMM_MS_Parameters_t*)CommandData;
+
BT_RFCOMM_DEBUG(1, "<< MS Command");
+ BT_RFCOMM_DEBUG(2, "-- DLCI: 0x%02X", Params->Channel.DLCI);
+
+ /* Ignore status flags sent to the control channel */
+ if (Params->Channel.DLCI == RFCOMM_CONTROL_DLCI)
+ return;
+
+ /* Retrieve existing channel configuration data, if already opened */
+ RFCOMM_Channel_t* RFCOMMChannel = RFCOMM_GetChannelData(Params->Channel.DLCI);
+
+ /* If the channel does not exist, abort */
+ if (RFCOMMChannel == NULL)
+ return;
+
+ /* Save the new channel signals to the channel state structure */
+ RFCOMMChannel->Signals = Params->Signals;
+
+ /* If the command contains the optional break signals field, store the value */
+ if (CommandDataLen == sizeof(RFCOMM_MS_Parameters_t))
+ RFCOMMChannel->BreakSignals = Params->BreakSignals;
+
+ struct
+ {
+ RFCOMM_Command_t CommandHeader;
+ uint8_t Length;
+ RFCOMM_MS_Parameters_t Params;
+ } MSResponse;
+
+ /* Fill out the MS response data */
+ MSResponse.CommandHeader = (RFCOMM_Command_t){.Command = RFCOMM_Control_ModemStatus, .EA = true};
+ MSResponse.Length = (CommandDataLen << 1) | 0x01;
+ MSResponse.Params = *Params;
+
+ BT_RFCOMM_DEBUG(1, ">> MS Response");
+
+ /* Send the PDN response to acknowledge the command */
+ RFCOMM_SendFrame(RFCOMM_CONTROL_DLCI, false, RFCOMM_Frame_UIH, sizeof(MSResponse), &MSResponse, Channel);
}
static void RFCOMM_ProcessRPNCommand(const RFCOMM_Command_t* const CommandHeader, const uint8_t* CommandData,
@@ -118,7 +153,7 @@ static void RFCOMM_ProcessDPNCommand(const RFCOMM_Command_t* const CommandHeader
const RFCOMM_DPN_Parameters_t* Params = (const RFCOMM_DPN_Parameters_t*)CommandData;
BT_RFCOMM_DEBUG(1, "<< DPN Command");
- BT_RFCOMM_DEBUG(2, "-- Config DLCI: 0x%02X", Params->DLCI);
+ BT_RFCOMM_DEBUG(2, "-- DLCI: 0x%02X", Params->DLCI);
/* Ignore parameter negotiations to the control channel */
if (Params->DLCI == RFCOMM_CONTROL_DLCI)
@@ -136,8 +171,10 @@ static void RFCOMM_ProcessDPNCommand(const RFCOMM_Command_t* const CommandHeader
/* If the channel's DLCI is zero, the channel state entry is free */
if (!(RFCOMM_Channels[i].DLCI))
{
- RFCOMMChannel = &RFCOMM_Channels[i];
- RFCOMMChannel->DLCI = Params->DLCI;
+ RFCOMMChannel = &RFCOMM_Channels[i];
+ RFCOMMChannel->DLCI = Params->DLCI;
+ RFCOMMChannel->Signals = 0;
+ RFCOMMChannel->BreakSignals = 0;
break;
}
}
@@ -154,7 +191,7 @@ static void RFCOMM_ProcessDPNCommand(const RFCOMM_Command_t* const CommandHeader
RFCOMMChannel->State = RFCOMM_Channel_Open;
RFCOMMChannel->Priority = Params->Priority;
RFCOMMChannel->UseUIFrames = (Params->FrameType != 0);
- RFCOMMChannel->RemoteMTU = Params->MaximumFrameSize;
+ RFCOMMChannel->MTU = Params->MaximumFrameSize;
struct
{
@@ -164,10 +201,10 @@ static void RFCOMM_ProcessDPNCommand(const RFCOMM_Command_t* const CommandHeader
} DPNResponse;
/* Fill out the DPN response data */
- DPNResponse.CommandHeader.Command = CommandHeader->Command;
- DPNResponse.CommandHeader.EA = true;
- DPNResponse.Length = (sizeof(DPNResponse.Params) << 1) | 0x01;
- DPNResponse.Params = *Params;
+ DPNResponse.CommandHeader = (RFCOMM_Command_t){.Command = RFCOMM_Control_DLCParameterNegotiation, .EA = true};
+ DPNResponse.Length = (sizeof(DPNResponse.Params) << 1) | 0x01;
+ DPNResponse.Params = *Params;
+ DPNResponse.Params.ConvergenceLayer = 0x00; // TODO: Enable credit based transaction support
BT_RFCOMM_DEBUG(1, ">> DPN Response");
diff --git a/Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMMControl.h b/Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMMControl.h
index e12c74c76..8cefa51c7 100644
--- a/Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMMControl.h
+++ b/Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMMControl.h
@@ -50,7 +50,11 @@
#include "RFCOMM.h"
/* Macros: */
- #define RFCOMM_
+ #define RFCOMM_STATUSFLAG_FC (1 << 1)
+ #define RFCOMM_STATUSFLAG_RTC (1 << 2)
+ #define RFCOMM_STATUSFLAG_RTR (1 << 3)
+ #define RFCOMM_STATUSFLAG_IC (1 << 6)
+ #define RFCOMM_STATUSFLAG_DV (1 << 7)
/* Enums: */
enum RFCOMM_Control_Commands_t
@@ -97,6 +101,13 @@
uint8_t MaxRetransmissions;
uint8_t RecoveryWindowSize;
} RFCOMM_DPN_Parameters_t;
+
+ typedef struct
+ {
+ RFCOMM_Address_t Channel;
+ uint8_t Signals;
+ uint8_t BreakSignals;
+ } RFCOMM_MS_Parameters_t;
/* Function Prototypes: */
void RFCOMM_ProcessControlCommand(const uint8_t* Command, Bluetooth_Channel_t* const Channel);
@@ -108,8 +119,8 @@
Bluetooth_Channel_t* const Channel);
static void RFCOMM_ProcessFCDCommand(const RFCOMM_Command_t* const CommandHeader, const uint8_t* CommandData,
Bluetooth_Channel_t* const Channel);
- static void RFCOMM_ProcessMSCommand(const RFCOMM_Command_t* const CommandHeader, const uint8_t* CommandData,
- Bluetooth_Channel_t* const Channel);
+ static void RFCOMM_ProcessMSCommand(const RFCOMM_Command_t* const CommandHeader, const uint8_t CommandDataLen,
+ const uint8_t* CommandData, Bluetooth_Channel_t* const Channel);
static void RFCOMM_ProcessRPNCommand(const RFCOMM_Command_t* const CommandHeader, const uint8_t* CommandData,
Bluetooth_Channel_t* const Channel);
static void RFCOMM_ProcessRLSCommand(const RFCOMM_Command_t* const CommandHeader, const uint8_t* CommandData,
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-02 19:23:46 +0000