tcp.h

最新版IAR FOR ARM（EWARM）5.11中的代码例子

//-----------------------------------------------------------------------------
// TCP
//-----------------------------------------------------------------------------

#ifndef H__TCP
#define H__TCP

#include "hal_mac.h"

//-----------------------------------------------------------------------------
// TCP state machine states
//-----------------------------------------------------------------------------
#define	LISTEN        1
#define	SYN_SENT      2
#define	SYN_RECVD     3
#define	ESTABLISHED   4
#define	FIN_WAIT_1    5
#define	FIN_WAIT_2    6
#define	CLOSE_WAIT    7
#define	CLOSING       8
#define	LAST_ACK      9
#define	TIME_WAIT     10
#define	CLOSED        11

//-----------------------------------------------------------------------------
//TCP control commands
//-----------------------------------------------------------------------------
#define	TCP_FIN  0x01
#define	TCP_SYN  0x02
#define	TCP_RST  0x04
#define	TCP_PSH  0x08
#define	TCP_ACK  0x10
#define	TCP_URG  0x20

//-----------------------------------------------------------------------------
//TCP header defines
//-----------------------------------------------------------------------------

#define TCP_PORT_HTTP 80
#define TCP_START_SEQ 0x32 //50 dec

//-----------------------------------------------------------------------------
// TCP control block, holds data of each connection
//-----------------------------------------------------------------------------
#define TCP_MAX_CONNECTIONS 3

typedef struct {
	u8 state;           // State of the TCP socket
	u8 dest_ip[4];      // Remote IP address
	u16 src_port;       // Local port number
	u16 dest_port;      // Remote port number
	u32 src_seq;        // Local sequence number
	u32 dest_seq;       // Remote sequence number
}TCB;
//-----------------------------------------------------------------------------
// Prototypes of functions from tcp.c
//-----------------------------------------------------------------------------
void Tcp_Ip_Init(void);
u8 Rx_TCP_Frame(EthernetFrame *frame);
void Tx_TCP_Frame(EthernetFrame *frame, u8 control_bits, u8 *szData, u16 nLength);

#endif