X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/28f1ac81176bbcd9fd13d94e61323522a5279d27..8e20e8697ff88d38ac01d62198dbdd552449e4aa:/Demos/Host/Incomplete/BluetoothHost/Lib/BluetoothACLPackets.c?ds=inline diff --git a/Demos/Host/Incomplete/BluetoothHost/Lib/BluetoothACLPackets.c b/Demos/Host/Incomplete/BluetoothHost/Lib/BluetoothACLPackets.c index 50fba7c5d..15b98215c 100644 --- a/Demos/Host/Incomplete/BluetoothHost/Lib/BluetoothACLPackets.c +++ b/Demos/Host/Incomplete/BluetoothHost/Lib/BluetoothACLPackets.c @@ -1,597 +1,809 @@ -/* - LUFA Library - Copyright (C) Dean Camera, 2010. - - dean [at] fourwalledcubicle [dot] com - www.fourwalledcubicle.com -*/ - -/* - Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com) - - Permission to use, copy, modify, distribute, and sell this - software and its documentation for any purpose is hereby granted - without fee, provided that the above copyright notice appear in - all copies and that both that the copyright notice and this - permission notice and warranty disclaimer appear in supporting - documentation, and that the name of the author not be used in - advertising or publicity pertaining to distribution of the - software without specific, written prior permission. - - The author disclaim all warranties with regard to this - software, including all implied warranties of merchantability - and fitness. In no event shall the author be liable for any - special, indirect or consequential damages or any damages - whatsoever resulting from loss of use, data or profits, whether - in an action of contract, negligence or other tortious action, - arising out of or in connection with the use or performance of - this software. -*/ - -#define INCLUDE_FROM_BLUETOOTH_ACLPACKETS_C -#include "BluetoothACLPackets.h" - -void Bluetooth_ACLTask(void) -{ - Bluetooth_ProcessACLPackets(); - - for (uint8_t i = 0; i < BLUETOOTH_MAX_OPEN_CHANNELS; i++) - { - Bluetooth_Channel_t* ChannelData = &Bluetooth_Connection.Channels[i]; - - bool MustSendConfigReq = true; - - switch (ChannelData->State) - { - case Channel_Config_WaitConfig: - ChannelData->State = Channel_Config_WaitReqResp; - break; - case Channel_Config_WaitSendConfig: - ChannelData->State = Channel_Config_WaitResp; - break; - default: - MustSendConfigReq = false; - break; - } - - if (MustSendConfigReq) - { - struct - { - BT_Signal_Header_t SignalCommandHeader; - BT_Signal_ConfigurationReq_t ConfigurationRequest; - - struct - { - BT_Config_Option_Header_t Header; - uint16_t Value; - } Option_LocalMTU; - } PacketData; - - PacketData.SignalCommandHeader.Code = BT_SIGNAL_CONFIGURATION_REQUEST; - PacketData.SignalCommandHeader.Identifier = ++Bluetooth_Connection.SignallingIdentifier; - PacketData.SignalCommandHeader.Length = sizeof(PacketData.ConfigurationRequest) + - sizeof(PacketData.Option_LocalMTU); - PacketData.ConfigurationRequest.DestinationChannel = ChannelData->RemoteNumber; - PacketData.ConfigurationRequest.Flags = 0; - PacketData.Option_LocalMTU.Header.Type = BT_CONFIG_OPTION_MTU; - PacketData.Option_LocalMTU.Header.Length = sizeof(PacketData.Option_LocalMTU.Value); - PacketData.Option_LocalMTU.Value = ChannelData->LocalMTU; - - Bluetooth_SendPacket(&PacketData, sizeof(PacketData), NULL); - - BT_ACL_DEBUG(1, ">> L2CAP Configuration Request", NULL); - BT_ACL_DEBUG(2, "-- Destination Channel: 0x%04X", PacketData.ConfigurationRequest.DestinationChannel); - } - } -} - -static void Bluetooth_ProcessACLPackets(void) -{ - BT_ACL_Header_t ACLPacketHeader; - BT_DataPacket_Header_t DataHeader; - - Pipe_SelectPipe(BLUETOOTH_DATA_IN_PIPE); - Pipe_Unfreeze(); - - if (!(Pipe_IsReadWriteAllowed())) - { - Pipe_Freeze(); - return; - } - - Pipe_Read_Stream_LE(&ACLPacketHeader, sizeof(ACLPacketHeader)); - Pipe_Read_Stream_LE(&DataHeader, sizeof(DataHeader)); - - BT_ACL_DEBUG(2, "", NULL); - BT_ACL_DEBUG(2, "Packet Received", NULL); - BT_ACL_DEBUG(2, "-- Connection Handle: 0x%04X", (ACLPacketHeader.ConnectionHandle & 0x0FFF)); - BT_ACL_DEBUG(2, "-- Data Length: 0x%04X", ACLPacketHeader.DataLength); - BT_ACL_DEBUG(2, "-- Destination Channel: 0x%04X", DataHeader.DestinationChannel); - BT_ACL_DEBUG(2, "-- Payload Length: 0x%04X", DataHeader.PayloadLength); - - if (DataHeader.DestinationChannel == BT_CHANNEL_SIGNALING) - { - BT_Signal_Header_t SignalCommandHeader; - Pipe_Read_Stream_LE(&SignalCommandHeader, sizeof(SignalCommandHeader)); - - switch (SignalCommandHeader.Code) - { - case BT_SIGNAL_CONNECTION_REQUEST: - Bluetooth_Signal_ConnectionReq(&ACLPacketHeader, &DataHeader, &SignalCommandHeader); - break; - case BT_SIGNAL_CONNECTION_RESPONSE: - Bluetooth_Signal_ConnectionResp(&ACLPacketHeader, &DataHeader, &SignalCommandHeader); - break; - case BT_SIGNAL_CONFIGURATION_REQUEST: - Bluetooth_Signal_ConfigurationReq(&ACLPacketHeader, &DataHeader, &SignalCommandHeader); - break; - case BT_SIGNAL_CONFIGURATION_RESPONSE: - Bluetooth_Signal_ConfigurationResp(&ACLPacketHeader, &DataHeader, &SignalCommandHeader); - break; - case BT_SIGNAL_DISCONNECTION_REQUEST: - Bluetooth_Signal_DisconnectionReq(&ACLPacketHeader, &DataHeader, &SignalCommandHeader); - break; - case BT_SIGNAL_DISCONNECTION_RESPONSE: - Bluetooth_Signal_DisconnectionResp(&ACLPacketHeader, &DataHeader, &SignalCommandHeader); - break; - case BT_SIGNAL_ECHO_REQUEST: - Bluetooth_Signal_EchoReq(&ACLPacketHeader, &DataHeader, &SignalCommandHeader); - break; - case BT_SIGNAL_INFORMATION_REQUEST: - Bluetooth_Signal_InformationReq(&ACLPacketHeader, &DataHeader, &SignalCommandHeader); - break; - default: - BT_ACL_DEBUG(1, "<< Unknown Signaling Command 0x%02X", SignalCommandHeader.Code); - - Pipe_Discard_Stream(ACLPacketHeader.DataLength); - Pipe_ClearIN(); - Pipe_Freeze(); - break; - } - } - else - { - Bluetooth_PacketReceived(&DataHeader.PayloadLength, Bluetooth_GetChannelData(DataHeader.DestinationChannel, false)); - - Pipe_SelectPipe(BLUETOOTH_DATA_IN_PIPE); - Pipe_Discard_Stream(DataHeader.PayloadLength); - Pipe_ClearIN(); - Pipe_Freeze(); - } -} - -uint8_t Bluetooth_SendPacket(void* Data, uint16_t DataLen, Bluetooth_Channel_t* Channel) -{ - BT_ACL_Header_t ACLPacketHeader; - BT_DataPacket_Header_t DataHeader; - - if (!(Bluetooth_Connection.IsConnected)) - return BT_SENDPACKET_NotConnected; - - if ((Channel != NULL) && (Channel->State != Channel_Open)) - return BT_SENDPACKET_ChannelNotOpen; - - // TODO: Add packet fragmentation here after retrieving the device's signal channel MTU - - ACLPacketHeader.ConnectionHandle = (Bluetooth_Connection.ConnectionHandle | BT_ACL_FIRST_AUTOFLUSH); - ACLPacketHeader.DataLength = sizeof(DataHeader) + DataLen; - DataHeader.PayloadLength = DataLen; - DataHeader.DestinationChannel = (Channel == NULL) ? BT_CHANNEL_SIGNALING : Channel->RemoteNumber; - - Pipe_SelectPipe(BLUETOOTH_DATA_OUT_PIPE); - Pipe_Unfreeze(); - - Pipe_Write_Stream_LE(&ACLPacketHeader, sizeof(ACLPacketHeader)); - Pipe_Write_Stream_LE(&DataHeader, sizeof(DataHeader)); - Pipe_Write_Stream_LE(Data, DataLen); - Pipe_ClearOUT(); - - Pipe_Freeze(); - - BT_ACL_DEBUG(2, "", NULL); - BT_ACL_DEBUG(2, "Packet Sent", NULL); - BT_ACL_DEBUG(2, "-- Connection Handle: 0x%04X", (ACLPacketHeader.ConnectionHandle & 0x0FFF)); - BT_ACL_DEBUG(2, "-- Data Length: 0x%04X", ACLPacketHeader.DataLength); - BT_ACL_DEBUG(2, "-- Destination Channel: 0x%04X", DataHeader.DestinationChannel); - BT_ACL_DEBUG(2, "-- Payload Length: 0x%04X", DataHeader.PayloadLength); - - return BT_SENDPACKET_NoError; -} - -Bluetooth_Channel_t* Bluetooth_OpenChannel(uint16_t PSM) -{ - Bluetooth_Channel_t* ChannelData = NULL; - - for (uint8_t i = 0; i < BLUETOOTH_MAX_OPEN_CHANNELS; i++) - { - if (Bluetooth_Connection.Channels[i].State == Channel_Closed) - { - ChannelData = &Bluetooth_Connection.Channels[i]; - ChannelData->LocalNumber = (BLUETOOTH_CHANNELNUMBER_BASEOFFSET + i); - break; - } - } - - if (ChannelData == NULL) - return NULL; - - ChannelData->RemoteNumber = 0; - ChannelData->PSM = PSM; - ChannelData->LocalMTU = MAXIMUM_CHANNEL_MTU; - ChannelData->State = Channel_Config_WaitConfig; - - struct - { - BT_Signal_Header_t SignalCommandHeader; - BT_Signal_ConnectionReq_t ConnectionRequest; - } PacketData; - - PacketData.SignalCommandHeader.Code = BT_SIGNAL_CONNECTION_REQUEST; - PacketData.SignalCommandHeader.Identifier = ++Bluetooth_Connection.SignallingIdentifier; - PacketData.SignalCommandHeader.Length = sizeof(PacketData.ConnectionRequest); - PacketData.ConnectionRequest.PSM = PSM; - PacketData.ConnectionRequest.SourceChannel = ChannelData->LocalNumber; - - Bluetooth_SendPacket(&PacketData, sizeof(PacketData), NULL); - - BT_ACL_DEBUG(1, ">> L2CAP Connection Request", NULL); - BT_ACL_DEBUG(2, "-- PSM 0x%04X", PacketData.ConnectionRequest.PSM); - BT_ACL_DEBUG(2, "-- Source Channel: 0x%04X", PacketData.ConnectionRequest.SourceChannel); - - return ChannelData; -} - -void Bluetooth_CloseChannel(Bluetooth_Channel_t* Channel) -{ - if ((Channel == NULL) || (Channel->State == Channel_Closed)) - return; - - Channel->State = Channel_WaitDisconnect; - - struct - { - BT_Signal_Header_t SignalCommandHeader; - BT_Signal_DisconnectionReq_t DisconnectionRequest; - } PacketData; - - PacketData.SignalCommandHeader.Code = BT_SIGNAL_DISCONNECTION_REQUEST; - PacketData.SignalCommandHeader.Identifier = ++Bluetooth_Connection.SignallingIdentifier; - PacketData.SignalCommandHeader.Length = sizeof(PacketData.DisconnectionRequest); - PacketData.DisconnectionRequest.DestinationChannel = Channel->RemoteNumber; - PacketData.DisconnectionRequest.SourceChannel = Channel->LocalNumber; - - Bluetooth_SendPacket(&PacketData, sizeof(PacketData), NULL); - - BT_ACL_DEBUG(1, ">> L2CAP Disconnection Request", NULL); - BT_ACL_DEBUG(2, "-- Destination Channel: 0x%04X", PacketData.DisconnectionRequest.DestinationChannel); - BT_ACL_DEBUG(2, "-- Source Channel: 0x%04X", PacketData.DisconnectionRequest.SourceChannel); -} - -static inline void Bluetooth_Signal_ConnectionReq(BT_ACL_Header_t* ACLPacketHeader, - BT_DataPacket_Header_t* DataHeader, - BT_Signal_Header_t* SignalCommandHeader) -{ - BT_Signal_ConnectionReq_t ConnectionRequest; - - Pipe_Read_Stream_LE(&ConnectionRequest, sizeof(ConnectionRequest)); - - Pipe_ClearIN(); - Pipe_Freeze(); - - BT_ACL_DEBUG(1, "<< L2CAP Connection Request", NULL); - BT_ACL_DEBUG(2, "-- PSM: 0x%04X", ConnectionRequest.PSM); - BT_ACL_DEBUG(2, "-- Source Channel: 0x%04X", ConnectionRequest.SourceChannel); - - Bluetooth_Channel_t* ChannelData = Bluetooth_GetChannelData(ConnectionRequest.SourceChannel, true); - - if (ChannelData == NULL) - { - for (uint8_t i = 0; i < BLUETOOTH_MAX_OPEN_CHANNELS; i++) - { - if (Bluetooth_Connection.Channels[i].State == Channel_Closed) - { - ChannelData = &Bluetooth_Connection.Channels[i]; - ChannelData->LocalNumber = (BLUETOOTH_CHANNELNUMBER_BASEOFFSET + i); - break; - } - } - } - - if (ChannelData != NULL) - { - ChannelData->RemoteNumber = ConnectionRequest.SourceChannel; - ChannelData->PSM = ConnectionRequest.PSM; - ChannelData->LocalMTU = MAXIMUM_CHANNEL_MTU; - ChannelData->State = Channel_Config_WaitConfig; - } - - struct - { - BT_Signal_Header_t SignalCommandHeader; - BT_Signal_ConnectionResp_t ConnectionResponse; - } ResponsePacket; - - ResponsePacket.SignalCommandHeader.Code = BT_SIGNAL_CONNECTION_RESPONSE; - ResponsePacket.SignalCommandHeader.Identifier = SignalCommandHeader->Identifier; - ResponsePacket.SignalCommandHeader.Length = sizeof(ResponsePacket.ConnectionResponse); - ResponsePacket.ConnectionResponse.Result = (ChannelData == NULL) ? BT_CONNECTION_REFUSED_RESOURCES : BT_CONNECTION_SUCCESSFUL; - ResponsePacket.ConnectionResponse.DestinationChannel = ChannelData->RemoteNumber; - ResponsePacket.ConnectionResponse.SourceChannel = ChannelData->LocalNumber; - ResponsePacket.ConnectionResponse.Status = 0x00; - - Bluetooth_SendPacket(&ResponsePacket, sizeof(ResponsePacket), NULL); - - BT_ACL_DEBUG(1, ">> L2CAP Connection Response", NULL); - BT_ACL_DEBUG(2, "-- Result: 0x%02X", ResponsePacket.ConnectionResponse.Result); - BT_ACL_DEBUG(2, "-- Destination Channel: 0x%04X", ResponsePacket.ConnectionResponse.DestinationChannel); - BT_ACL_DEBUG(2, "-- Source Channel: 0x%04X", ResponsePacket.ConnectionResponse.SourceChannel); -} - -static inline void Bluetooth_Signal_ConnectionResp(BT_ACL_Header_t* ACLPacketHeader, - BT_DataPacket_Header_t* DataHeader, - BT_Signal_Header_t* SignalCommandHeader) -{ - BT_Signal_ConnectionResp_t ConnectionResponse; - - Pipe_Read_Stream_LE(&ConnectionResponse, sizeof(ConnectionResponse)); - - Pipe_ClearIN(); - Pipe_Freeze(); - - BT_ACL_DEBUG(1, "<< L2CAP Connection Response", NULL); - BT_ACL_DEBUG(2, "-- Result: 0x%02X", ConnectionResponse.Result); - BT_ACL_DEBUG(2, "-- Source Channel: 0x%04X", ConnectionResponse.SourceChannel); - BT_ACL_DEBUG(2, "-- Destination Channel: 0x%04X", ConnectionResponse.DestinationChannel); - - Bluetooth_Channel_t* ChannelData = Bluetooth_GetChannelData(ConnectionResponse.DestinationChannel, false); - - if (ChannelData != NULL) - { - ChannelData->RemoteNumber = ConnectionResponse.SourceChannel; - ChannelData->State = (ConnectionResponse.Result == BT_CONNECTION_SUCCESSFUL) ? - Channel_Config_WaitConfig : Channel_Closed; - } -} - - -static inline void Bluetooth_Signal_ConfigurationReq(BT_ACL_Header_t* ACLPacketHeader, - BT_DataPacket_Header_t* DataHeader, - BT_Signal_Header_t* SignalCommandHeader) -{ - BT_Signal_ConfigurationReq_t ConfigurationRequest; - uint8_t OptionsLen; - - Pipe_Read_Stream_LE(&ConfigurationRequest, sizeof(ConfigurationRequest)); - OptionsLen = (DataHeader->PayloadLength - sizeof(*SignalCommandHeader)); - - Bluetooth_Channel_t* ChannelData = Bluetooth_GetChannelData(ConfigurationRequest.DestinationChannel, false); - - while (OptionsLen) - { - BT_Config_Option_Header_t OptionHeader; - - Pipe_Read_Stream_LE(&OptionHeader, sizeof(OptionHeader)); - - if ((OptionHeader.Type == BT_CONFIG_OPTION_MTU) && (ChannelData != NULL)) - Pipe_Read_Stream_LE(&ChannelData->RemoteMTU, sizeof(ChannelData->RemoteMTU)); - else - Pipe_Discard_Stream(OptionHeader.Length); - - OptionsLen -= (sizeof(OptionHeader) + OptionHeader.Length); - } - - Pipe_ClearIN(); - Pipe_Freeze(); - - BT_ACL_DEBUG(1, "<< L2CAP Configuration Request", NULL); - BT_ACL_DEBUG(2, "-- Destination Channel: 0x%04X", ConfigurationRequest.DestinationChannel); - BT_ACL_DEBUG(2, "-- Options Len: 0x%04X", (DataHeader->PayloadLength - sizeof(*SignalCommandHeader))); - BT_ACL_DEBUG(2, "-- Remote MTU: 0x%04X", ChannelData->RemoteMTU); - - struct - { - BT_Signal_Header_t SignalCommandHeader; - BT_Signal_ConfigurationResp_t ConfigurationResponse; - } ResponsePacket; - - ResponsePacket.SignalCommandHeader.Code = BT_SIGNAL_CONFIGURATION_RESPONSE; - ResponsePacket.SignalCommandHeader.Identifier = SignalCommandHeader->Identifier; - ResponsePacket.SignalCommandHeader.Length = sizeof(ResponsePacket.ConfigurationResponse); - ResponsePacket.ConfigurationResponse.SourceChannel = ChannelData->RemoteNumber; - ResponsePacket.ConfigurationResponse.Flags = 0x00; - ResponsePacket.ConfigurationResponse.Result = (ChannelData != NULL) ? BT_CONFIGURATION_SUCCESSFUL : BT_CONFIGURATION_REJECTED; - - Bluetooth_SendPacket(&ResponsePacket, sizeof(ResponsePacket), NULL); - - if (ChannelData != NULL) - { - switch (ChannelData->State) - { - case Channel_Config_WaitConfig: - ChannelData->State = Channel_Config_WaitSendConfig; - break; - case Channel_Config_WaitReqResp: - ChannelData->State = Channel_Config_WaitResp; - break; - case Channel_Config_WaitReq: - ChannelData->State = Channel_Open; - break; - } - } - - BT_ACL_DEBUG(1, ">> L2CAP Configuration Response", NULL); - BT_ACL_DEBUG(2, "-- Source Channel: 0x%04X", ResponsePacket.ConfigurationResponse.SourceChannel); - BT_ACL_DEBUG(2, "-- Result: 0x%02X", ResponsePacket.ConfigurationResponse.Result); -} - -static inline void Bluetooth_Signal_ConfigurationResp(BT_ACL_Header_t* ACLPacketHeader, - BT_DataPacket_Header_t* DataHeader, - BT_Signal_Header_t* SignalCommandHeader) -{ - BT_Signal_ConfigurationResp_t ConfigurationResponse; - - Pipe_Read_Stream_LE(&ConfigurationResponse, sizeof(ConfigurationResponse)); - - Pipe_ClearIN(); - Pipe_Freeze(); - - BT_ACL_DEBUG(1, "<< L2CAP Configuration Response", NULL); - BT_ACL_DEBUG(2, "-- Source Channel: 0x%04X", ConfigurationResponse.SourceChannel); - BT_ACL_DEBUG(2, "-- Result: 0x%02X", ConfigurationResponse.Result); - - if (ConfigurationResponse.Result == BT_CONFIGURATION_SUCCESSFUL) - { - Bluetooth_Channel_t* ChannelData = Bluetooth_GetChannelData(ConfigurationResponse.SourceChannel, true); - - if (ChannelData != NULL) - { - switch (ChannelData->State) - { - case Channel_Config_WaitReqResp: - ChannelData->State = Channel_Config_WaitReq; - break; - case Channel_Config_WaitResp: - ChannelData->State = Channel_Open; - break; - } - } - } -} - -static inline void Bluetooth_Signal_DisconnectionReq(BT_ACL_Header_t* ACLPacketHeader, - BT_DataPacket_Header_t* DataHeader, - BT_Signal_Header_t* SignalCommandHeader) -{ - BT_Signal_DisconnectionReq_t DisconnectionRequest; - - Pipe_Read_Stream_LE(&DisconnectionRequest, sizeof(DisconnectionRequest)); - - BT_ACL_DEBUG(1, "<< L2CAP Disconnection Request", NULL); - BT_ACL_DEBUG(2, "-- Destination Channel: 0x%04X", DisconnectionRequest.DestinationChannel); - BT_ACL_DEBUG(2, "-- Source Channel: 0x%04X", DisconnectionRequest.SourceChannel); - - Pipe_ClearIN(); - Pipe_Freeze(); - - Bluetooth_Channel_t* ChannelData = Bluetooth_GetChannelData(DisconnectionRequest.SourceChannel, true); - - struct - { - BT_Signal_Header_t SignalCommandHeader; - BT_Signal_DisconnectionResp_t DisconnectionResponse; - } ResponsePacket; - - ResponsePacket.SignalCommandHeader.Code = BT_SIGNAL_DISCONNECTION_RESPONSE; - ResponsePacket.SignalCommandHeader.Identifier = SignalCommandHeader->Identifier; - ResponsePacket.SignalCommandHeader.Length = sizeof(ResponsePacket.DisconnectionResponse); - ResponsePacket.DisconnectionResponse.DestinationChannel = ChannelData->RemoteNumber; - ResponsePacket.DisconnectionResponse.SourceChannel = ChannelData->LocalNumber; - - Bluetooth_SendPacket(&ResponsePacket, sizeof(ResponsePacket), NULL); - - if (ChannelData != NULL) - ChannelData->State = Channel_Closed; - - BT_ACL_DEBUG(1, ">> L2CAP Disconnection Response", NULL); - BT_ACL_DEBUG(2, "-- Source Channel: 0x%04X", ResponsePacket.DisconnectionResponse.SourceChannel); - BT_ACL_DEBUG(2, "-- Destination Channel: 0x%04X", ResponsePacket.DisconnectionResponse.DestinationChannel); -} - -static inline void Bluetooth_Signal_DisconnectionResp(BT_ACL_Header_t* ACLPacketHeader, - BT_DataPacket_Header_t* DataHeader, - BT_Signal_Header_t* SignalCommandHeader) -{ - BT_Signal_DisconnectionResp_t DisconnectionResponse; - - Pipe_Read_Stream_LE(&DisconnectionResponse, sizeof(DisconnectionResponse)); - - BT_ACL_DEBUG(1, "<< L2CAP Disconnection Response", NULL); - BT_ACL_DEBUG(2, "-- Destination Channel: 0x%04X", DisconnectionResponse.DestinationChannel); - BT_ACL_DEBUG(2, "-- Source Channel: 0x%04X", DisconnectionResponse.SourceChannel); - - Pipe_ClearIN(); - Pipe_Freeze(); - - Bluetooth_Channel_t* ChannelData = Bluetooth_GetChannelData(DisconnectionResponse.SourceChannel, true); - - if (ChannelData->State == Channel_WaitDisconnect) - ChannelData->State = Channel_Closed; -} - -static inline void Bluetooth_Signal_EchoReq(BT_ACL_Header_t* ACLPacketHeader, - BT_DataPacket_Header_t* DataHeader, - BT_Signal_Header_t* SignalCommandHeader) -{ - BT_ACL_DEBUG(1, "<< L2CAP Echo Request", NULL); - - Pipe_ClearIN(); - Pipe_Freeze(); - - struct - { - BT_Signal_Header_t SignalCommandHeader; - } ResponsePacket; - - ResponsePacket.SignalCommandHeader.Code = BT_SIGNAL_ECHO_RESPONSE; - ResponsePacket.SignalCommandHeader.Identifier = SignalCommandHeader->Identifier; - ResponsePacket.SignalCommandHeader.Length = 0; - - Bluetooth_SendPacket(&ResponsePacket, sizeof(ResponsePacket), NULL); - - BT_ACL_DEBUG(1, ">> L2CAP Echo Response", NULL); -} - -static inline void Bluetooth_Signal_InformationReq(BT_ACL_Header_t* ACLPacketHeader, - BT_DataPacket_Header_t* DataHeader, - BT_Signal_Header_t* SignalCommandHeader) -{ - BT_Signal_InformationReq_t InformationRequest; - - Pipe_Read_Stream_LE(&InformationRequest, sizeof(InformationRequest)); - - BT_ACL_DEBUG(1, "<< L2CAP Information Request", NULL); - BT_ACL_DEBUG(2, "-- Info Type: 0x%04X", InformationRequest.InfoType); - - Pipe_ClearIN(); - Pipe_Freeze(); - - struct - { - BT_Signal_Header_t SignalCommandHeader; - BT_Signal_InformationResp_t InformationResponse; - - uint8_t Data[4]; - } ResponsePacket; - - uint8_t DataLen = 0; - - switch (InformationRequest.InfoType) - { - case BT_INFOREQ_MTU: - ResponsePacket.InformationResponse.Result = BT_INFORMATION_SUCCESSFUL; - DataLen = 2; - - *((uint16_t*)&ResponsePacket.Data) = MAXIMUM_CHANNEL_MTU; - break; - case BT_INFOREQ_EXTENDEDFEATURES: - ResponsePacket.InformationResponse.Result = BT_INFORMATION_SUCCESSFUL; - DataLen = 4; - - *((uint32_t*)&ResponsePacket.Data) = 0; - break; - default: - ResponsePacket.InformationResponse.Result = BT_INFORMATION_NOTSUPPORTED; - DataLen = 0; - break; - } - - ResponsePacket.SignalCommandHeader.Code = BT_SIGNAL_INFORMATION_RESPONSE; - ResponsePacket.SignalCommandHeader.Identifier = SignalCommandHeader->Identifier; - ResponsePacket.SignalCommandHeader.Length = sizeof(ResponsePacket.InformationResponse) + DataLen; - - Bluetooth_SendPacket(&ResponsePacket, (sizeof(ResponsePacket) - sizeof(ResponsePacket.Data) + DataLen), NULL); - - BT_ACL_DEBUG(1, ">> L2CAP Information Response", NULL); - BT_ACL_DEBUG(2, "-- Result: 0x%02X", ResponsePacket.InformationResponse.Result); -} +/* + LUFA Library + Copyright (C) Dean Camera, 2012. + + dean [at] fourwalledcubicle [dot] com + www.lufa-lib.org +*/ + +/* + Copyright 2012 Dean Camera (dean [at] fourwalledcubicle [dot] com) + + Permission to use, copy, modify, distribute, and sell this + software and its documentation for any purpose is hereby granted + without fee, provided that the above copyright notice appear in + all copies and that both that the copyright notice and this + permission notice and warranty disclaimer appear in supporting + documentation, and that the name of the author not be used in + advertising or publicity pertaining to distribution of the + software without specific, written prior permission. + + The author disclaim all warranties with regard to this + software, including all implied warranties of merchantability + and fitness. In no event shall the author be liable for any + special, indirect or consequential damages or any damages + whatsoever resulting from loss of use, data or profits, whether + in an action of contract, negligence or other tortious action, + arising out of or in connection with the use or performance of + this software. +*/ + +/** \file + * + * Bluetooth L2CAP layer management code. This module managed the creation, + * configuration and teardown of L2CAP channels, and manages packet reception + * and sending to and from other Bluetooth devices. + */ + +/* + TODO: Make SendPacket respect receiver's MTU + TODO: Make ReceivePacket stitch together MTU fragments (?) + */ + +#define INCLUDE_FROM_BLUETOOTH_ACLPACKETS_C +#include "BluetoothACLPackets.h" + +/** Bluetooth ACL processing task. This task should be called repeatedly the main Bluetooth + * stack task to manage the ACL processing state. + */ +void Bluetooth_ACLTask(void) +{ + /* Process incoming ACL packets, if any */ + Bluetooth_ProcessIncomingACLPackets(); + + /* Check for any half-open channels, send configuration details to the remote device if found */ + for (uint8_t i = 0; i < BLUETOOTH_MAX_OPEN_CHANNELS; i++) + { + Bluetooth_Channel_t* ChannelData = &Bluetooth_Connection.Channels[i]; + + bool MustSendConfigReq = true; + + /* Check if we are in a channel state which requires a configuration request to be sent */ + switch (ChannelData->State) + { + case BT_Channel_Config_WaitConfig: + ChannelData->State = BT_Channel_Config_WaitReqResp; + break; + case BT_Channel_Config_WaitSendConfig: + ChannelData->State = BT_Channel_Config_WaitResp; + break; + default: + MustSendConfigReq = false; + break; + } + + /* Only send a configuration request if it the channel was in a state which required it */ + if (MustSendConfigReq) + { + struct + { + BT_Signal_Header_t SignalCommandHeader; + BT_Signal_ConfigurationReq_t ConfigurationRequest; + + struct + { + BT_Config_Option_Header_t Header; + uint16_t Value; + } Option_LocalMTU; + } PacketData; + + /* Fill out the Signal Command header in the response packet */ + PacketData.SignalCommandHeader.Code = BT_SIGNAL_CONFIGURATION_REQUEST; + PacketData.SignalCommandHeader.Identifier = ++Bluetooth_Connection.SignalingIdentifier; + PacketData.SignalCommandHeader.Length = sizeof(PacketData.ConfigurationRequest) + + sizeof(PacketData.Option_LocalMTU); + + /* Fill out the Configuration Request in the response packet, including local MTU information */ + PacketData.ConfigurationRequest.DestinationChannel = ChannelData->RemoteNumber; + PacketData.ConfigurationRequest.Flags = 0; + PacketData.Option_LocalMTU.Header.Type = BT_CONFIG_OPTION_MTU; + PacketData.Option_LocalMTU.Header.Length = sizeof(PacketData.Option_LocalMTU.Value); + PacketData.Option_LocalMTU.Value = ChannelData->LocalMTU; + + Bluetooth_SendPacket(&PacketData, sizeof(PacketData), NULL); + + BT_ACL_DEBUG(1, ">> L2CAP Configuration Request"); + BT_ACL_DEBUG(2, "-- Destination Channel: 0x%04X", PacketData.ConfigurationRequest.DestinationChannel); + } + } +} + +/** Incoming ACL packet processing task. This task is called by the main ACL processing task to read in and process + * any incoming ACL packets to the device, handling signal requests as they are received or passing along channel + * data to the user application. + */ +static void Bluetooth_ProcessIncomingACLPackets(void) +{ + BT_ACL_Header_t ACLPacketHeader; + BT_DataPacket_Header_t DataHeader; + + Pipe_SelectPipe(BLUETOOTH_DATA_IN_PIPE); + Pipe_Unfreeze(); + + if (!(Pipe_IsReadWriteAllowed())) + { + Pipe_Freeze(); + return; + } + + /* Read in the received ACL packet headers when it has been discovered that a packet has been received */ + Pipe_Read_Stream_LE(&ACLPacketHeader, sizeof(ACLPacketHeader), NULL); + Pipe_Read_Stream_LE(&DataHeader, sizeof(DataHeader), NULL); + + BT_ACL_DEBUG(2, ""); + BT_ACL_DEBUG(2, "Packet Received"); + BT_ACL_DEBUG(2, "-- Connection Handle: 0x%04X", (ACLPacketHeader.ConnectionHandle & 0x0FFF)); + BT_ACL_DEBUG(2, "-- Data Length: 0x%04X", ACLPacketHeader.DataLength); + BT_ACL_DEBUG(2, "-- Destination Channel: 0x%04X", DataHeader.DestinationChannel); + BT_ACL_DEBUG(2, "-- Payload Length: 0x%04X", DataHeader.PayloadLength); + + /* Check the packet's destination channel - signaling channel should be processed by the stack internally */ + if (DataHeader.DestinationChannel == BT_CHANNEL_SIGNALING) + { + /* Read in the Signal Command header of the incoming packet */ + BT_Signal_Header_t SignalCommandHeader; + Pipe_Read_Stream_LE(&SignalCommandHeader, sizeof(SignalCommandHeader), NULL); + + /* Dispatch to the appropriate handler function based on the Signal message code */ + switch (SignalCommandHeader.Code) + { + case BT_SIGNAL_CONNECTION_REQUEST: + Bluetooth_Signal_ConnectionReq(&SignalCommandHeader); + break; + case BT_SIGNAL_CONNECTION_RESPONSE: + Bluetooth_Signal_ConnectionResp(&SignalCommandHeader); + break; + case BT_SIGNAL_CONFIGURATION_REQUEST: + Bluetooth_Signal_ConfigurationReq(&SignalCommandHeader); + break; + case BT_SIGNAL_CONFIGURATION_RESPONSE: + Bluetooth_Signal_ConfigurationResp(&SignalCommandHeader); + break; + case BT_SIGNAL_DISCONNECTION_REQUEST: + Bluetooth_Signal_DisconnectionReq(&SignalCommandHeader); + break; + case BT_SIGNAL_DISCONNECTION_RESPONSE: + Bluetooth_Signal_DisconnectionResp(&SignalCommandHeader); + break; + case BT_SIGNAL_ECHO_REQUEST: + Bluetooth_Signal_EchoReq(&SignalCommandHeader); + break; + case BT_SIGNAL_INFORMATION_REQUEST: + Bluetooth_Signal_InformationReq(&SignalCommandHeader); + break; + case BT_SIGNAL_COMMAND_REJECT: + BT_ACL_DEBUG(1, "<< Command Reject"); + + uint16_t RejectReason; + Pipe_Read_Stream_LE(&RejectReason, sizeof(RejectReason), NULL); + Pipe_Discard_Stream(ACLPacketHeader.DataLength - sizeof(RejectReason), NULL); + Pipe_ClearIN(); + Pipe_Freeze(); + + BT_ACL_DEBUG(2, "-- Reason: %d", RejectReason); + break; + default: + BT_ACL_DEBUG(1, "<< Unknown Signaling Command 0x%02X", SignalCommandHeader.Code); + + Pipe_Discard_Stream(ACLPacketHeader.DataLength, NULL); + Pipe_ClearIN(); + Pipe_Freeze(); + break; + } + } + else + { + /* Non-signaling packet received, read in the packet contents and pass to the user application */ + uint8_t PacketData[DataHeader.PayloadLength]; + Pipe_Read_Stream_LE(PacketData, DataHeader.PayloadLength, NULL); + Pipe_ClearIN(); + Pipe_Freeze(); + + Bluetooth_PacketReceived(PacketData, DataHeader.PayloadLength, + Bluetooth_GetChannelData(DataHeader.DestinationChannel, CHANNEL_SEARCH_LOCALNUMBER)); + } +} + +/** Retrieves the channel information structure with the given local or remote channel number from the channel list. + * + * \param[in] SearchValue Value to search for in the channel structure list + * \param[in] SearchKey Key to search within the channel structure, a \c CHANNEL_SEARCH_* mask + * + * \return Pointer to the matching channel information structure in the channel table if found, NULL otherwise + */ +Bluetooth_Channel_t* Bluetooth_GetChannelData(const uint16_t SearchValue, + const uint8_t SearchKey) +{ + for (uint8_t i = 0; i < BLUETOOTH_MAX_OPEN_CHANNELS; i++) + { + Bluetooth_Channel_t* ChannelData = &Bluetooth_Connection.Channels[i]; + + /* Closed channels should be ignored as they are not considered valid data */ + if (ChannelData->State == BT_Channel_Closed) + continue; + + bool FoundMatch = false; + + /* Search the current channel for the search key to see if it matches */ + switch (SearchKey) + { + case CHANNEL_SEARCH_LOCALNUMBER: + FoundMatch = (SearchValue == ChannelData->LocalNumber); + break; + case CHANNEL_SEARCH_REMOTENUMBER: + FoundMatch = (SearchValue == ChannelData->RemoteNumber); + break; + case CHANNEL_SEARCH_PSM: + FoundMatch = (SearchValue == ChannelData->PSM); + break; + } + + if (FoundMatch) + return ChannelData; + } + + return NULL; +} + +/** Sends a packet to the remote device on the specified channel. + * + * \param[in] Data Pointer to a buffer where the data is to be sourced from + * \param[in] DataLen Length of the data to send + * \param[in] ACLChannel ACL channel information structure containing the destination channel's information, NULL + * to send to the remote device's signaling channel + * + * \return A value from the \ref BT_SendPacket_ErrorCodes_t enum + */ +uint8_t Bluetooth_SendPacket(void* Data, + const uint16_t DataLen, + Bluetooth_Channel_t* const ACLChannel) +{ + BT_ACL_Header_t ACLPacketHeader; + BT_DataPacket_Header_t DataHeader; + + /* A remote device must be connected before a packet transmission is attempted */ + if (!(Bluetooth_Connection.IsConnected)) + return BT_SENDPACKET_NotConnected; + + /* If the destination channel is not the signaling channel and it is not currently fully open, abort */ + if ((ACLChannel != NULL) && (ACLChannel->State != BT_Channel_Open)) + return BT_SENDPACKET_ChannelNotOpen; + + /* Fill out the packet's header from the remote device connection information structure */ + ACLPacketHeader.ConnectionHandle = (Bluetooth_Connection.ConnectionHandle | BT_ACL_FIRST_AUTOFLUSH); + ACLPacketHeader.DataLength = sizeof(DataHeader) + DataLen; + DataHeader.PayloadLength = DataLen; + DataHeader.DestinationChannel = (ACLChannel == NULL) ? BT_CHANNEL_SIGNALING : ACLChannel->RemoteNumber; + + Pipe_SelectPipe(BLUETOOTH_DATA_OUT_PIPE); + + Pipe_WaitUntilReady(); + Pipe_Unfreeze(); + + /* Write the packet contents to the pipe so that it can be sent to the remote device */ + Pipe_Write_Stream_LE(&ACLPacketHeader, sizeof(ACLPacketHeader), NULL); + Pipe_Write_Stream_LE(&DataHeader, sizeof(DataHeader), NULL); + Pipe_Write_Stream_LE(Data, DataLen, NULL); + Pipe_ClearOUT(); + + Pipe_Freeze(); + + BT_ACL_DEBUG(2, ""); + BT_ACL_DEBUG(2, "Packet Sent"); + BT_ACL_DEBUG(2, "-- Connection Handle: 0x%04X", (ACLPacketHeader.ConnectionHandle & 0x0FFF)); + BT_ACL_DEBUG(2, "-- Data Length: 0x%04X", ACLPacketHeader.DataLength); + BT_ACL_DEBUG(2, "-- Destination Channel: 0x%04X", DataHeader.DestinationChannel); + BT_ACL_DEBUG(2, "-- Payload Length: 0x%04X", DataHeader.PayloadLength); + + return BT_SENDPACKET_NoError; +} + +/** Opens a Bluetooth channel to the currently connected remote device, so that data can be exchanged. + * + * \note The channel is not immediately opened when this function returns - it must undergo a two way + * connection and configuration process first as the main Bluetooth stack processing task is + * repeatedly called. The returned channel is unusable by the user application until its State + * element has progressed to the Open state. + * + * \param[in] PSM PSM of the service that the channel is to be opened for + * + * \return Pointer to the channel information structure of the opened channel, or NULL if no free channels + */ +Bluetooth_Channel_t* Bluetooth_OpenChannel(const uint16_t PSM) +{ + Bluetooth_Channel_t* ChannelData = NULL; + + /* Search through the channel information list for a free channel item */ + for (uint8_t i = 0; i < BLUETOOTH_MAX_OPEN_CHANNELS; i++) + { + if (Bluetooth_Connection.Channels[i].State == BT_Channel_Closed) + { + ChannelData = &Bluetooth_Connection.Channels[i]; + + /* Set the new channel structure's local channel number to a unique value within the connection orientated + channel address space */ + ChannelData->LocalNumber = (BT_CHANNELNUMBER_BASEOFFSET + i); + break; + } + } + + /* If no free channel item was found in the list, all channels are occupied - abort */ + if (ChannelData == NULL) + return NULL; + + /* Reset and fill out the allocated channel's information structure with defaults */ + ChannelData->RemoteNumber = 0; + ChannelData->PSM = PSM; + ChannelData->LocalMTU = MAXIMUM_CHANNEL_MTU; + ChannelData->State = BT_Channel_WaitConnectRsp; + + struct + { + BT_Signal_Header_t SignalCommandHeader; + BT_Signal_ConnectionReq_t ConnectionRequest; + } PacketData; + + /* Fill out the Signal Command header in the response packet */ + PacketData.SignalCommandHeader.Code = BT_SIGNAL_CONNECTION_REQUEST; + PacketData.SignalCommandHeader.Identifier = ++Bluetooth_Connection.SignalingIdentifier; + PacketData.SignalCommandHeader.Length = sizeof(PacketData.ConnectionRequest); + + /* Fill out the Connection Request in the response packet */ + PacketData.ConnectionRequest.PSM = PSM; + PacketData.ConnectionRequest.SourceChannel = ChannelData->LocalNumber; + + Bluetooth_SendPacket(&PacketData, sizeof(PacketData), NULL); + + BT_ACL_DEBUG(1, ">> L2CAP Connection Request"); + BT_ACL_DEBUG(2, "-- PSM 0x%04X", PacketData.ConnectionRequest.PSM); + BT_ACL_DEBUG(2, "-- Source Channel: 0x%04X", PacketData.ConnectionRequest.SourceChannel); + + return ChannelData; +} + +/** Closes a Bluetooth channel that is open to the currently connected remote device, so that no further data + * can be exchanged. + * + * \note The channel is not immediately closed when this function returns - it must undergo an asynchronous + * disconnection process first as the main Bluetooth stack processing task is repeatedly called. The + * returned channel is unusable by the user application upon return however the channel is not completely + * closed until its State element has progressed to the Closed state. + * + * \param[in,out] ACLChannel ACL channel information structure of the channel to close + */ +void Bluetooth_CloseChannel(Bluetooth_Channel_t* const ACLChannel) +{ + /* Don't try to close a non-existing or already closed channel */ + if ((ACLChannel == NULL) || (ACLChannel->State == BT_Channel_Closed)) + return; + + /* Set the channel's state to the start of the teardown process */ + ACLChannel->State = BT_Channel_WaitDisconnect; + + struct + { + BT_Signal_Header_t SignalCommandHeader; + BT_Signal_DisconnectionReq_t DisconnectionRequest; + } PacketData; + + /* Fill out the Signal Command header in the response packet */ + PacketData.SignalCommandHeader.Code = BT_SIGNAL_DISCONNECTION_REQUEST; + PacketData.SignalCommandHeader.Identifier = ++Bluetooth_Connection.SignalingIdentifier; + PacketData.SignalCommandHeader.Length = sizeof(PacketData.DisconnectionRequest); + + /* Fill out the Disconnection Request in the response packet */ + PacketData.DisconnectionRequest.DestinationChannel = ACLChannel->RemoteNumber; + PacketData.DisconnectionRequest.SourceChannel = ACLChannel->LocalNumber; + + Bluetooth_SendPacket(&PacketData, sizeof(PacketData), NULL); + + BT_ACL_DEBUG(1, ">> L2CAP Disconnection Request"); + BT_ACL_DEBUG(2, "-- Destination Channel: 0x%04X", PacketData.DisconnectionRequest.DestinationChannel); + BT_ACL_DEBUG(2, "-- Source Channel: 0x%04X", PacketData.DisconnectionRequest.SourceChannel); +} + +/** Internal Bluetooth stack Signal Command processing routine for a Connection Request command. + * + * \param[in] SignalCommandHeader Pointer to the start of the received packet's Signal Command header + */ +static inline void Bluetooth_Signal_ConnectionReq(const BT_Signal_Header_t* const SignalCommandHeader) +{ + BT_Signal_ConnectionReq_t ConnectionRequest; + + Pipe_Read_Stream_LE(&ConnectionRequest, sizeof(ConnectionRequest), NULL); + + Pipe_ClearIN(); + Pipe_Freeze(); + + BT_ACL_DEBUG(1, "<< L2CAP Connection Request"); + BT_ACL_DEBUG(2, "-- PSM: 0x%04X", ConnectionRequest.PSM); + BT_ACL_DEBUG(2, "-- Source Channel: 0x%04X", ConnectionRequest.SourceChannel); + + /* Try to retrieve the existing channel's information structure if it exists */ + Bluetooth_Channel_t* ChannelData = Bluetooth_GetChannelData(ConnectionRequest.SourceChannel, CHANNEL_SEARCH_REMOTENUMBER); + + /* If an existing channel item with the correct remote channel number was not found, find a free channel entry */ + if (ChannelData == NULL) + { + /* Look through the channel information list for a free entry */ + for (uint8_t i = 0; i < BLUETOOTH_MAX_OPEN_CHANNELS; i++) + { + if (Bluetooth_Connection.Channels[i].State == BT_Channel_Closed) + { + ChannelData = &Bluetooth_Connection.Channels[i]; + + /* Set the new channel structure's local channel number to a unique value within the connection orientated + channel address space */ + ChannelData->LocalNumber = (BT_CHANNELNUMBER_BASEOFFSET + i); + break; + } + } + } + + uint8_t ChannelStatus = BT_CONNECTION_REFUSED_RESOURCES; + + /* Reset the channel item contents only if a channel entry was found for it */ + if (ChannelData != NULL) + { + /* Check if the user application will allow the connection based on its PSM */ + if (Bluetooth_ChannelConnectionRequest(ConnectionRequest.PSM)) + { + ChannelData->RemoteNumber = ConnectionRequest.SourceChannel; + ChannelData->PSM = ConnectionRequest.PSM; + ChannelData->LocalMTU = MAXIMUM_CHANNEL_MTU; + ChannelData->State = BT_Channel_Config_WaitConfig; + + ChannelStatus = BT_CONNECTION_SUCCESSFUL; + } + else + { + ChannelStatus = BT_CONNECTION_REFUSED_PSM; + } + } + + struct + { + BT_Signal_Header_t SignalCommandHeader; + BT_Signal_ConnectionResp_t ConnectionResponse; + } ResponsePacket; + + /* Fill out the Signal Command header in the response packet */ + ResponsePacket.SignalCommandHeader.Code = BT_SIGNAL_CONNECTION_RESPONSE; + ResponsePacket.SignalCommandHeader.Identifier = SignalCommandHeader->Identifier; + ResponsePacket.SignalCommandHeader.Length = sizeof(ResponsePacket.ConnectionResponse); + + /* Fill out the Connection Response in the response packet */ + ResponsePacket.ConnectionResponse.DestinationChannel = ChannelData->LocalNumber; + ResponsePacket.ConnectionResponse.SourceChannel = ChannelData->RemoteNumber; + ResponsePacket.ConnectionResponse.Result = ChannelStatus; + ResponsePacket.ConnectionResponse.Status = 0x00; + + Bluetooth_SendPacket(&ResponsePacket, sizeof(ResponsePacket), NULL); + + BT_ACL_DEBUG(1, ">> L2CAP Connection Response"); + BT_ACL_DEBUG(2, "-- Result: 0x%02X", ResponsePacket.ConnectionResponse.Result); + BT_ACL_DEBUG(2, "-- Destination Channel: 0x%04X", ResponsePacket.ConnectionResponse.DestinationChannel); + BT_ACL_DEBUG(2, "-- Source Channel: 0x%04X", ResponsePacket.ConnectionResponse.SourceChannel); +} + +/** Internal Bluetooth stack Signal Command processing routine for a Connection Response command. + * + * \param[in] SignalCommandHeader Pointer to the start of the received packet's Signal Command header + */ +static inline void Bluetooth_Signal_ConnectionResp(const BT_Signal_Header_t* const SignalCommandHeader) +{ + BT_Signal_ConnectionResp_t ConnectionResponse; + + Pipe_Read_Stream_LE(&ConnectionResponse, sizeof(ConnectionResponse), NULL); + + Pipe_ClearIN(); + Pipe_Freeze(); + + BT_ACL_DEBUG(1, "<< L2CAP Connection Response"); + BT_ACL_DEBUG(2, "-- Result: 0x%02X", ConnectionResponse.Result); + BT_ACL_DEBUG(2, "-- Source Channel: 0x%04X", ConnectionResponse.SourceChannel); + BT_ACL_DEBUG(2, "-- Destination Channel: 0x%04X", ConnectionResponse.DestinationChannel); + + /* Search for the referenced channel in the channel information list */ + Bluetooth_Channel_t* ChannelData = Bluetooth_GetChannelData(ConnectionResponse.SourceChannel, CHANNEL_SEARCH_LOCALNUMBER); + + /* Only progress if the referenced channel data was found */ + if (ChannelData != NULL) + { + /* Set the channel structure's remote channel number to the channel allocated on the remote device */ + ChannelData->RemoteNumber = ConnectionResponse.SourceChannel; + ChannelData->State = (ConnectionResponse.Result == BT_CONNECTION_SUCCESSFUL) ? + BT_Channel_Config_WaitConfig : BT_Channel_Closed; + } +} + +/** Internal Bluetooth stack Signal Command processing routine for a Configuration Request command. + * + * \param[in] SignalCommandHeader Pointer to the start of the received packet's Signal Command header + */ +static inline void Bluetooth_Signal_ConfigurationReq(const BT_Signal_Header_t* const SignalCommandHeader) +{ + BT_Signal_ConfigurationReq_t ConfigurationRequest; + + /* Allocate a buffer large enough to hold the variable number of configuration options in the request */ + uint8_t OptionsLen = (SignalCommandHeader->Length - sizeof(ConfigurationRequest)); + uint8_t Options[OptionsLen]; + + Pipe_Read_Stream_LE(&ConfigurationRequest, sizeof(ConfigurationRequest), NULL); + Pipe_Read_Stream_LE(&Options, sizeof(Options), NULL); + + Pipe_ClearIN(); + Pipe_Freeze(); + + /* Search for the referenced channel in the channel information list */ + Bluetooth_Channel_t* ChannelData = Bluetooth_GetChannelData(ConfigurationRequest.DestinationChannel, CHANNEL_SEARCH_LOCALNUMBER); + + BT_ACL_DEBUG(1, "<< L2CAP Configuration Request"); + BT_ACL_DEBUG(2, "-- Destination Channel: 0x%04X", ConfigurationRequest.DestinationChannel); + BT_ACL_DEBUG(2, "-- Options Len: 0x%04X", OptionsLen); + + /* Only look at the channel configuration options if a valid channel entry for the local channel number was found */ + if (ChannelData != NULL) + { + /* Iterate through each option in the configuration request to look for ones which can be processed */ + uint8_t OptionPos = 0; + while (OptionPos < OptionsLen) + { + BT_Config_Option_Header_t* OptionHeader = (BT_Config_Option_Header_t*)&Options[OptionPos]; + void* OptionData = &Options[OptionPos + sizeof(BT_Config_Option_Header_t)]; + + BT_ACL_DEBUG(2, "-- Option Type: 0x%04X", OptionHeader->Type); + BT_ACL_DEBUG(2, "-- Option Length: 0x%04X", (sizeof(BT_Config_Option_Header_t) + OptionHeader->Length)); + + /* Store the remote MTU option's value if present */ + if (OptionHeader->Type == BT_CONFIG_OPTION_MTU) + ChannelData->RemoteMTU = *((uint16_t*)OptionData); + + /* Progress to the next option in the packet */ + OptionPos += (sizeof(BT_Config_Option_Header_t) + OptionHeader->Length); + } + } + + struct + { + BT_Signal_Header_t SignalCommandHeader; + BT_Signal_ConfigurationResp_t ConfigurationResponse; + } ResponsePacket; + + /* Fill out the Signal Command header in the response packet */ + ResponsePacket.SignalCommandHeader.Code = BT_SIGNAL_CONFIGURATION_RESPONSE; + ResponsePacket.SignalCommandHeader.Identifier = SignalCommandHeader->Identifier; + ResponsePacket.SignalCommandHeader.Length = sizeof(ResponsePacket.ConfigurationResponse); + + /* Fill out the Configuration Response in the response packet */ + ResponsePacket.ConfigurationResponse.SourceChannel = ChannelData->RemoteNumber; + ResponsePacket.ConfigurationResponse.Flags = 0x00; + ResponsePacket.ConfigurationResponse.Result = (ChannelData != NULL) ? BT_CONFIGURATION_SUCCESSFUL : BT_CONFIGURATION_REJECTED; + + Bluetooth_SendPacket(&ResponsePacket, sizeof(ResponsePacket), NULL); + + if (ChannelData != NULL) + { + switch (ChannelData->State) + { + case BT_Channel_Config_WaitConfig: + ChannelData->State = BT_Channel_Config_WaitSendConfig; + break; + case BT_Channel_Config_WaitReqResp: + ChannelData->State = BT_Channel_Config_WaitResp; + break; + case BT_Channel_Config_WaitReq: + ChannelData->State = BT_Channel_Open; + Bluetooth_ChannelOpened(ChannelData); + break; + } + } + + BT_ACL_DEBUG(1, ">> L2CAP Configuration Response"); + BT_ACL_DEBUG(2, "-- Source Channel: 0x%04X", ResponsePacket.ConfigurationResponse.SourceChannel); + BT_ACL_DEBUG(2, "-- Result: 0x%02X", ResponsePacket.ConfigurationResponse.Result); +} + +/** Internal Bluetooth stack Signal Command processing routine for a Configuration Response command. + * + * \param[in] SignalCommandHeader Pointer to the start of the received packet's Signal Command header + */ +static inline void Bluetooth_Signal_ConfigurationResp(const BT_Signal_Header_t* const SignalCommandHeader) +{ + BT_Signal_ConfigurationResp_t ConfigurationResponse; + + Pipe_Read_Stream_LE(&ConfigurationResponse, sizeof(ConfigurationResponse), NULL); + + Pipe_ClearIN(); + Pipe_Freeze(); + + BT_ACL_DEBUG(1, "<< L2CAP Configuration Response"); + BT_ACL_DEBUG(2, "-- Source Channel: 0x%04X", ConfigurationResponse.SourceChannel); + BT_ACL_DEBUG(2, "-- Result: 0x%02X", ConfigurationResponse.Result); + + /* Search for the referenced channel in the channel information list */ + Bluetooth_Channel_t* ChannelData = Bluetooth_GetChannelData(ConfigurationResponse.SourceChannel, CHANNEL_SEARCH_REMOTENUMBER); + + /* Only update the channel's state if it was found in the channel list */ + if (ChannelData != NULL) + { + /* Check if the channel configuration completed successfully */ + if (ConfigurationResponse.Result == BT_CONFIGURATION_SUCCESSFUL) + { + switch (ChannelData->State) + { + case BT_Channel_Config_WaitReqResp: + ChannelData->State = BT_Channel_Config_WaitReq; + break; + case BT_Channel_Config_WaitResp: + ChannelData->State = BT_Channel_Open; + Bluetooth_ChannelOpened(ChannelData); + break; + } + } + else + { + /* Configuration failed - close the channel */ + ChannelData->State = BT_Channel_Closed; + } + } +} + +/** Internal Bluetooth stack Signal Command processing routine for a Disconnection Request command. + * + * \param[in] SignalCommandHeader Pointer to the start of the received packet's Signal Command header + */ +static inline void Bluetooth_Signal_DisconnectionReq(const BT_Signal_Header_t* const SignalCommandHeader) +{ + BT_Signal_DisconnectionReq_t DisconnectionRequest; + + Pipe_Read_Stream_LE(&DisconnectionRequest, sizeof(DisconnectionRequest), NULL); + + BT_ACL_DEBUG(1, "<< L2CAP Disconnection Request"); + BT_ACL_DEBUG(2, "-- Destination Channel: 0x%04X", DisconnectionRequest.DestinationChannel); + BT_ACL_DEBUG(2, "-- Source Channel: 0x%04X", DisconnectionRequest.SourceChannel); + + Pipe_ClearIN(); + Pipe_Freeze(); + + /* Search for the referenced channel in the channel information list */ + Bluetooth_Channel_t* ChannelData = Bluetooth_GetChannelData(DisconnectionRequest.SourceChannel, CHANNEL_SEARCH_REMOTENUMBER); + + struct + { + BT_Signal_Header_t SignalCommandHeader; + BT_Signal_DisconnectionResp_t DisconnectionResponse; + } ResponsePacket; + + /* Fill out the Signal Command header in the response packet */ + ResponsePacket.SignalCommandHeader.Code = BT_SIGNAL_DISCONNECTION_RESPONSE; + ResponsePacket.SignalCommandHeader.Identifier = SignalCommandHeader->Identifier; + ResponsePacket.SignalCommandHeader.Length = sizeof(ResponsePacket.DisconnectionResponse); + + /* Fill out the Disconnection Response in the response packet */ + ResponsePacket.DisconnectionResponse.DestinationChannel = ChannelData->RemoteNumber; + ResponsePacket.DisconnectionResponse.SourceChannel = ChannelData->LocalNumber; + + Bluetooth_SendPacket(&ResponsePacket, sizeof(ResponsePacket), NULL); + + /* If the channel was found in the channel list, close it */ + if (ChannelData != NULL) + ChannelData->State = BT_Channel_Closed; + + BT_ACL_DEBUG(1, ">> L2CAP Disconnection Response"); + BT_ACL_DEBUG(2, "-- Source Channel: 0x%04X", ResponsePacket.DisconnectionResponse.SourceChannel); + BT_ACL_DEBUG(2, "-- Destination Channel: 0x%04X", ResponsePacket.DisconnectionResponse.DestinationChannel); +} + +/** Internal Bluetooth stack Signal Command processing routine for a Disconnection Response command. + * + * \param[in] SignalCommandHeader Pointer to the start of the received packet's Signal Command header + */ +static inline void Bluetooth_Signal_DisconnectionResp(const BT_Signal_Header_t* const SignalCommandHeader) +{ + BT_Signal_DisconnectionResp_t DisconnectionResponse; + + Pipe_Read_Stream_LE(&DisconnectionResponse, sizeof(DisconnectionResponse), NULL); + + BT_ACL_DEBUG(1, "<< L2CAP Disconnection Response"); + BT_ACL_DEBUG(2, "-- Destination Channel: 0x%04X", DisconnectionResponse.DestinationChannel); + BT_ACL_DEBUG(2, "-- Source Channel: 0x%04X", DisconnectionResponse.SourceChannel); + + Pipe_ClearIN(); + Pipe_Freeze(); + + /* Search for the referenced channel in the channel information list */ + Bluetooth_Channel_t* ChannelData = Bluetooth_GetChannelData(DisconnectionResponse.SourceChannel, CHANNEL_SEARCH_REMOTENUMBER); + + /* If the channel was found in the channel list, close it */ + if (ChannelData != NULL) + ChannelData->State = BT_Channel_Closed; +} + +/** Internal Bluetooth stack Signal Command processing routine for an Echo Request command. + * + * \param[in] SignalCommandHeader Pointer to the start of the received packet's Signal Command header + */ +static inline void Bluetooth_Signal_EchoReq(const BT_Signal_Header_t* const SignalCommandHeader) +{ + BT_ACL_DEBUG(1, "<< L2CAP Echo Request"); + + Pipe_ClearIN(); + Pipe_Freeze(); + + struct + { + BT_Signal_Header_t SignalCommandHeader; + } ResponsePacket; + + /* Fill out the Signal Command header in the response packet */ + ResponsePacket.SignalCommandHeader.Code = BT_SIGNAL_ECHO_RESPONSE; + ResponsePacket.SignalCommandHeader.Identifier = SignalCommandHeader->Identifier; + ResponsePacket.SignalCommandHeader.Length = 0; + + Bluetooth_SendPacket(&ResponsePacket, sizeof(ResponsePacket), NULL); + + BT_ACL_DEBUG(1, ">> L2CAP Echo Response"); +} + +/** Internal Bluetooth stack Signal Command processing routine for an Information Request command. + * + * \param[in] SignalCommandHeader Pointer to the start of the received packet's Signal Command header + */ +static inline void Bluetooth_Signal_InformationReq(const BT_Signal_Header_t* const SignalCommandHeader) +{ + BT_Signal_InformationReq_t InformationRequest; + + Pipe_Read_Stream_LE(&InformationRequest, sizeof(InformationRequest), NULL); + + BT_ACL_DEBUG(1, "<< L2CAP Information Request"); + BT_ACL_DEBUG(2, "-- Info Type: 0x%04X", InformationRequest.InfoType); + + Pipe_ClearIN(); + Pipe_Freeze(); + + struct + { + BT_Signal_Header_t SignalCommandHeader; + BT_Signal_InformationResp_t InformationResponse; + + uint8_t Data[4]; + } ResponsePacket; + + uint8_t DataLen = 0; + + /* Retrieve the requested information and store it in the outgoing packet, if found */ + switch (InformationRequest.InfoType) + { + case BT_INFOREQ_MTU: + ResponsePacket.InformationResponse.Result = BT_INFORMATION_SUCCESSFUL; + DataLen = 2; + + *((uint16_t*)&ResponsePacket.Data) = MAXIMUM_CHANNEL_MTU; + break; + case BT_INFOREQ_EXTENDEDFEATURES: + ResponsePacket.InformationResponse.Result = BT_INFORMATION_SUCCESSFUL; + DataLen = 4; + + *((uint32_t*)&ResponsePacket.Data) = 0; + break; + default: + ResponsePacket.InformationResponse.Result = BT_INFORMATION_NOTSUPPORTED; + DataLen = 0; + break; + } + + /* Fill out the Signal Command header in the response packet */ + ResponsePacket.SignalCommandHeader.Code = BT_SIGNAL_INFORMATION_RESPONSE; + ResponsePacket.SignalCommandHeader.Identifier = SignalCommandHeader->Identifier; + ResponsePacket.SignalCommandHeader.Length = sizeof(ResponsePacket.InformationResponse) + DataLen; + + /* Fill out the Information Response in the response packet */ + ResponsePacket.InformationResponse.InfoType = InformationRequest.InfoType; + + Bluetooth_SendPacket(&ResponsePacket, (sizeof(ResponsePacket) - sizeof(ResponsePacket.Data) + DataLen), NULL); + + BT_ACL_DEBUG(1, ">> L2CAP Information Response"); + BT_ACL_DEBUG(2, "-- Result: 0x%02X", ResponsePacket.InformationResponse.Result); +} +