tftp.h

motorola自己开发的针对coldfire 5272的Dbug bootloader程序

/*
 * File:		tftp.h
 * Purpose:		Data definitions for TFTP
 *
 * Notes:
 *
 * Author:		Eric DeVolder
 * Date:		3-26-96
 *
 * Modifications:
 *
 */

#ifndef _TFTP_H
#define _TFTP_H

/********************************************************************/

#define TFTP_RRQ			(1)
#define TFTP_WRQ			(2)
#define TFTP_DATA			(3)
#define TFTP_ACK			(4)
#define TFTP_ERROR			(5)

#define TFTP_ERR_FNF		1
#define TFTP_ERR_AV			2
#define TFTP_ERR_DF			3
#define TFTP_ERR_ILL		4
#define TFTP_ERR_TID		5
#define TFTP_FE				6
#define TFTP_NSU			7
#define TFTP_ERR_UD			0

#define OCTET				"octet"
#define NETASCII			"netascii"

/* Protocol Header information */
#define TFTP_HDR_OFFSET		(ETH_HDR_SIZE + IP_HDR_SIZE + UDP_HDR_SIZE)

/* Timeout in seconds */
#define TFTP_TIMEOUT		3

/* Maximum TFTP Packet Size (payload only - no header) */
#define TFTP_PKTSIZE		512

/* Number of TFTP Data Buffers */
#define NUM_TFTPBD			6

/********************************************************************/

/* Data Buffer Pointer Structure */
typedef struct
{
	uint8	data[TFTP_PKTSIZE];
	uint16	bytes;
} DATA_BUF;

/* TFTP RRQ/WRQ Packet */
typedef struct
{
	uint16	opcode;
	char	filename_mode[TFTP_PKTSIZE - 2];
} RWRQ;

/* TFTP DATA Packet */
typedef struct 
{
	uint16	opcode;
	uint16	blocknum;
	uint8	data[TFTP_PKTSIZE - 4];
} DATA;

/* TFTP Acknowledge Packet */
typedef struct
{
	uint16	opcode;
	uint16	blocknum;
} ACK;

/* TFTP Error Packet */
typedef struct
{
	uint16	opcode;
	uint16	code;
	char	msg[TFTP_PKTSIZE - 4];
} ERROR;

/* TFTP Generic Packet */
typedef struct
{
	uint16 opcode;
} GEN;

union TFTPpacket
{
	RWRQ	rwrq;
	DATA	data;
	ACK		ack;
	ERROR	error;
	GEN		generic;
};

/* TFTP Connection Status */
typedef struct
{
	/* Pointer to next character in buffer ring */
	uint8 *next_char;

	/* Direction of current connection, read or write */
	uint8 dir;

	/* Connection established flag */
	uint8 open;

	/* Pointer to our Network InterFace */
	NIF *nif;

	/* File being transferred */
	char *file;
	
	/* Server IP address */
	IP_ADDR	server_ip;

	/* Data Buffer pointers */
	DATA_BUF pkt_data;

	/* Bytes received counter */
	uint32 bytes_recv;

	/* Bytes sent counter */
	uint32 bytes_sent;

	/* Server UDP port */
	uint16	server_port;
	
	/* My UDP port */
	uint16	my_port;
	
	/* Expected TFTP block number */
	uint16 exp_blocknum;

	/* Error Flag */
	uint8 error;

} TFTP_Connection;


/********************************************************************/

void	tftp_handler(NIF *, NBUF *, int) ;
int		tftp_write (NIF *, char *, IP_ADDR_P, uint32, uint32);
int		tftp_read(NIF *, char *, IP_ADDR_P);
void	tftp_end(int);
int		tftp_in_char(void);

/********************************************************************/

#endif	/* _TFTP_H */