mirror of
https://github.com/qmk/qmk_firmware.git
synced 2024-12-23 09:59:53 +00:00
261 lines
12 KiB
C
261 lines
12 KiB
C
|
/*
|
||
|
|
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_Init(void);
|
||
|
|
void TCP_Task(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
|
||
|
|
|