--- /dev/null
+/*
+ LUFA Library
+ Copyright (C) Dean Camera, 2017.
+
+ dean [at] fourwalledcubicle [dot] com
+ www.lufa-lib.org
+*/
+
+/*
+ Copyright 2017 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 disclaims 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
+ *
+ * Header file for TCP.c.
+ */
+
+#ifndef _TCP_H_
+#define _TCP_H_
+
+ /* Includes: */
+ #include <avr/io.h>
+ #include <stdbool.h>
+
+ #include "EthernetProtocols.h"
+ #include "Ethernet.h"
+ #include "ProtocolDecoders.h"
+
+ /* Macros: */
+ /** Maximum number of TCP ports which can be open at the one time. */
+ #define MAX_OPEN_TCP_PORTS 1
+
+ /** Maximum number of TCP connections which can be sustained at the one time. */
+ #define MAX_TCP_CONNECTIONS 3
+
+ /** TCP window size, giving the maximum number of bytes which can be buffered at the one time. */
+ #define TCP_WINDOW_SIZE 512
+
+ /** Port number for HTTP transmissions. */
+ #define TCP_PORT_HTTP SwapEndian_16(80)
+
+ /** Data direction indicator for a TCP application buffer, indicating data from host-to-device. */
+ #define TCP_PACKETDIR_IN false
+
+ /** Data direction indicator for a TCP application buffer, indicating data from device-to-host. */
+ #define TCP_PACKETDIR_OUT true
+
+ /** Congestion Window Reduced TCP flag mask. */
+ #define TCP_FLAG_CWR (1 << 7)
+
+ /** Explicit Congestion Notification TCP flag mask. */
+ #define TCP_FLAG_ECE (1 << 6)
+
+ /** Urgent TCP flag mask. */
+ #define TCP_FLAG_URG (1 << 5)
+
+ /** Data Acknowledge TCP flag mask. */
+ #define TCP_FLAG_ACK (1 << 4)
+
+ /** Data Push TCP flag mask. */
+ #define TCP_FLAG_PSH (1 << 3)
+
+ /** Reset TCP flag mask. */
+ #define TCP_FLAG_RST (1 << 2)
+
+ /** Synchronize TCP flag mask. */
+ #define TCP_FLAG_SYN (1 << 1)
+
+ /** Connection Finalize TCP flag mask. */
+ #define TCP_FLAG_FIN (1 << 0)
+
+ /** Application macro: Determines if the given application buffer contains a packet received from the host
+ *
+ * \param[in] Buffer Application buffer to check
+ *
+ * \return Boolean \c true if the buffer contains a packet from the host, \c false otherwise
+ */
+ #define TCP_APP_HAS_RECEIVED_PACKET(Buffer) (Buffer->Ready && (Buffer->Direction == TCP_PACKETDIR_IN))
+
+ /** Application macro: Indicates if the application buffer is currently locked by the application for device-to-host transfers.
+ *
+ * \param[in] Buffer Application buffer to check
+ *
+ * \return Boolean \c true if the buffer has been captured by the application for device-to-host transmissions, \c false otherwise
+ */
+ #define TCP_APP_HAVE_CAPTURED_BUFFER(Buffer) (!(Buffer->Ready) && Buffer->InUse && (Buffer->Direction == TCP_PACKETDIR_OUT))
+
+ /** Application macro: Indicates if the application can lock the buffer for multiple continued device-to-host transmissions.
+ *
+ * \param[in] Buffer Application buffer to check
+ *
+ * \return Boolean \c true if the buffer may be captured by the application for device-to-host transmissions, \c false otherwise
+ */
+ #define TCP_APP_CAN_CAPTURE_BUFFER(Buffer) Buffer->InUse
+
+ /** Application macro: Captures the application buffer, locking it for device-to-host transmissions only. This should be
+ * performed when the application needs to transmit several packets worth of data in succession with no interruptions from the host.
+ *
+ * \pre The application must check that the buffer can be locked first using TCP_APP_CAN_CAPTURE_BUFFER().
+ *
+ * \param[in] Buffer Application buffer to lock
+ */
+ #define TCP_APP_CAPTURE_BUFFER(Buffer) do { Buffer->Direction = TCP_PACKETDIR_OUT; Buffer->InUse = true; } while (0)
+
+ /** Application macro: Releases a captured application buffer, allowing for host-to-device packets to be received.
+ *
+ * \param[in] Buffer Application buffer to release
+ */
+ #define TCP_APP_RELEASE_BUFFER(Buffer) do { Buffer->InUse = false; } while (0)
+
+ /** Application macro: Sends the contents of the given application buffer to the host.
+ *
+ * \param[in] Buffer Application buffer to send
+ * \param[in] Len Length of data contained in the buffer
+ */
+ #define TCP_APP_SEND_BUFFER(Buffer, Len) do { Buffer->Direction = TCP_PACKETDIR_OUT; Buffer->Length = Len; Buffer->Ready = true; } while (0)
+
+ /** Application macro: Clears the application buffer, ready for a packet to be written to it.
+ *
+ * \param[in] Buffer Application buffer to clear
+ */
+ #define TCP_APP_CLEAR_BUFFER(Buffer) do { Buffer->Ready = false; Buffer->Length = 0; } while (0)
+
+ /** Application macro: Closes an open connection to a host.
+ *
+ * \param[in] Connection Open TCP connection to close
+ */
+ #define TCP_APP_CLOSECONNECTION(Connection) do { Connection->State = TCP_Connection_Closing; } while (0)
+
+ /* Enums: */
+ /** Enum for possible TCP port states. */
+ enum TCP_PortStates_t
+ {
+ TCP_Port_Closed = 0, /**< TCP port closed, no connections to a host may be made on this port. */
+ TCP_Port_Open = 1, /**< TCP port open, connections to a host may be made on this port. */
+ };
+
+ /** Enum for possible TCP connection states. */
+ enum TCP_ConnectionStates_t
+ {
+ TCP_Connection_Listen = 0, /**< Listening for a connection from a host */
+ TCP_Connection_SYNSent = 1, /**< Unused */
+ TCP_Connection_SYNReceived = 2, /**< SYN received, waiting for ACK */
+ TCP_Connection_Established = 3, /**< Connection established in both directions */
+ TCP_Connection_FINWait1 = 4, /**< Closing, waiting for ACK */
+ TCP_Connection_FINWait2 = 5, /**< Closing, waiting for FIN ACK */
+ TCP_Connection_CloseWait = 6, /**< Closing, waiting for ACK */
+ TCP_Connection_Closing = 7, /**< Unused */
+ TCP_Connection_LastACK = 8, /**< Unused */
+ TCP_Connection_TimeWait = 9, /**< Unused */
+ TCP_Connection_Closed = 10, /**< Connection closed in both directions */
+ };
+
+ /* Type Defines: */
+ /** Type define for a TCP connection buffer structure, including size, data and direction. */
+ typedef struct
+ {
+ uint16_t Length; /**< Length of data in the TCP application buffer */
+ uint8_t Data[TCP_WINDOW_SIZE]; /**< TCP application data buffer */
+ bool Direction; /**< Buffer transmission direction, either TCP_PACKETDIR_IN or TCP_PACKETDIR_OUT */
+ bool Ready; /**< If data from host, indicates buffer ready to be read, otherwise indicates
+ * buffer ready to be sent to the host
+ */
+ bool InUse; /**< Indicates if the buffer is locked to to the current direction, and cannot be changed */
+ } TCP_ConnectionBuffer_t;
+
+ /** Type define for a TCP connection information structure. */
+ typedef struct
+ {
+ uint32_t SequenceNumberIn; /**< Current TCP sequence number for host-to-device */
+ uint32_t SequenceNumberOut; /**< Current TCP sequence number for device-to-host */
+ TCP_ConnectionBuffer_t Buffer; /**< Connection application data buffer */
+ } TCP_ConnectionInfo_t;
+
+ /** Type define for a complete TCP connection state. */
+ typedef struct
+ {
+ uint16_t Port; /**< Connection port number on the device */
+ uint16_t RemotePort; /**< Connection port number on the host */
+ IP_Address_t RemoteAddress; /**< Connection protocol IP address of the host */
+ TCP_ConnectionInfo_t Info; /**< Connection information, including application buffer */
+ uint8_t State; /**< Current connection state, a value from the \ref TCP_ConnectionStates_t enum */
+ } TCP_ConnectionState_t;
+
+ /** Type define for a TCP port state. */
+ typedef struct
+ {
+ uint16_t Port; /**< TCP port number on the device */
+ uint8_t State; /**< Current port state, a value from the \ref TCP_PortStates_t enum */
+ void (*ApplicationHandler) (TCP_ConnectionState_t* ConnectionState,
+ TCP_ConnectionBuffer_t* Buffer); /**< Port application handler */
+ } TCP_PortState_t;
+
+ /** Type define for a TCP packet header. */
+ typedef struct
+ {
+ uint16_t SourcePort; /**< Source port of the TCP packet */
+ uint16_t DestinationPort; /**< Destination port of the TCP packet */
+
+ uint32_t SequenceNumber; /**< Data sequence number of the packet */
+ uint32_t AcknowledgmentNumber; /**< Data acknowledgment number of the packet */
+
+ unsigned Reserved : 4; /**< Reserved, must be all 0 */
+ unsigned DataOffset : 4; /**< Offset of the data from the start of the header, in 4 byte chunks */
+ uint8_t Flags; /**< TCP packet flags */
+ uint16_t WindowSize; /**< Current data window size (bytes remaining in reception buffer) */
+
+ uint16_t Checksum; /**< TCP checksum */
+ uint16_t UrgentPointer; /**< Urgent data pointer */
+ } TCP_Header_t;
+
+ /* Function Prototypes: */
+ void TCP_TCPTask(USB_ClassInfo_RNDIS_Device_t* const RNDISInterfaceInfo,
+ Ethernet_Frame_Info_t* const FrameOUT);
+ void TCP_Init(void);
+ bool TCP_SetPortState(const uint16_t Port,
+ const uint8_t State,
+ void (*Handler)(TCP_ConnectionState_t*, TCP_ConnectionBuffer_t*));
+ uint8_t TCP_GetPortState(const uint16_t Port);
+ bool TCP_SetConnectionState(const uint16_t Port,
+ const IP_Address_t* RemoteAddress,
+ const uint16_t RemotePort,
+ const uint8_t State);
+ uint8_t TCP_GetConnectionState(const uint16_t Port,
+ const IP_Address_t* RemoteAddress,
+ const uint16_t RemotePort);
+ TCP_ConnectionInfo_t* TCP_GetConnectionInfo(const uint16_t Port,
+ const IP_Address_t* RemoteAddress,
+ const uint16_t RemotePort);
+ int16_t TCP_ProcessTCPPacket(void* IPHeaderInStart,
+ void* TCPHeaderInStart,
+ void* TCPHeaderOutStart);
+
+ #if defined(INCLUDE_FROM_TCP_C)
+ static uint16_t TCP_Checksum16(void* TCPHeaderOutStart,
+ const IP_Address_t* SourceAddress,
+ const IP_Address_t* DestinationAddress,
+ uint16_t TCPOutSize);
+ #endif
+
+#endif
+
projects / qmk_firmware.git / blobdiff