ftp_callback.c

世纪民生公司的cs6209的开发ftp服务器的演示源程序。

#include <stdio.h>
#include "hpserver.h"
#include "ether.h"
#include "netutil.h"
#include "net.h"
#include "ip.h"
#include "tcp.h"
#include "ftp.h"
/************************************************************************
/*	Function Name : ftp_on_error										*
/*																		*
/*	Arguments : 														*
/*			st_ftp *ftp:Point to st_ftp structure.						*
/*	Return : 															*
/*			Return false to close FTP client.							*
/*																		*
/*  Comment :															*
/*		This function is a sample FTP on error callback function for 	*
/*		FTP client. 													*
/************************************************************************/
char ftp_on_error(st_ftp *ftp)
{
	printf("\nftp error last_command=%s,return code=%s",ftp->last_command,ftp->last_return_code);
	return 0;
}
/************************************************************************
/*	Function Name : ftp_on_data_send									*
/*																		*
/*	Arguments : 														*
/*			st_ftp *ftp:Point to st_ftp structure.						*
/*	Return : 															*
/*			Return false to close FTP client.							*
/*																		*
/*  Comment :															*
/*		This function is a sample FTP on data send callback function for*
/*		FTP client. 													*
/*																		*
/************************************************************************/
char ftp_on_data_send(TSOCK *ts,char start_of_send_flag)
{
/*The header file of file to be send by FTP*/
#include "cs00.h"
int tmp;
static unsigned int upload_count;

	/*This is the first time that FTP system call this function.*/
	if (start_of_send_flag)
		upload_count=0;

	/*Calculate the max number of bytes to be put in TX buffer.*/
	tmp=buff_freelen(&ts->txb);
	if (tmp>(CS00_SIZE-upload_count))
		tmp=(CS00_SIZE-upload_count);

	/*Put data to transmit buffer.*/
	if (tmp)
	{
		buff_in(&ts->txb,&cs00_jpg[upload_count],tmp);
		upload_count+=tmp;
		return 1;
	}
	/*All data have been transmitting.*/
	else if (upload_count>=CS00_SIZE)
		return 0;
	/*Wait for more TX buffer.*/
	else  return 1;
    
}	
/************************************************************************
/*	Function Name : ftp_on_data_receive									*
/*																		*
/*	Arguments : 														*
/*			st_ftp *ftp:Point to st_ftp structure.						*
/*	Return : 															*
/*			None.							*
/*																		*
/*  Comment :															*
/*		This function is a sample FTP on receive send callback function *
/*		for FTP client. 												*
/*																		*
/************************************************************************/
char ftp_on_data_receive(TSOCK *ts,char end_of_data_flag)
{
int tmp=1;
char char_tmp;

	/*Get data from RX buffer and display it.*/	
	while (tmp)
	{
		tmp=buff_out(&ts->rxb,&char_tmp,1);
		printf("%c",char_tmp);
	}

	/*Receiving data complete.*/
	if (end_of_data_flag)
		return 0;
	/*Wait for more data.*/
	else
		return 1;
}
/************************************************************************
/*	Function Name : ftp_demo											*
/*																		*
/*	Arguments : 														*
/*			st_ftp *ftp:Point to st_ftp structure.						*
/*	Return : 															*
/*			None.														*
/*																		*
/*  Comment :															*
/*		This function start a FTP client and add some command to FTP	*
/*		command queue.This is a sample for FTP client.					*
/*																		*
/************************************************************************/
void ftp_demo(st_ftp *ftp)
{
	/*Open and start a FTP client.*/
	if (ftp_open(ftp,1)==FTP_SUCCESS)
	{
		printf("\nTry to connect to FTP server....");
		/*Add NLST command to get file list.*/
		en_queue_command(ftp,"NLST",FTP_GET_FILE,ftp_on_data_receive);

		/*Add TYPE I command to set data transmitting as binary.*/
		en_queue_command(ftp,"TYPE I",FTP_NO_DATA,0);

		/*Add STOR CS00.jpg command to upload CS00.jpg to FTP server.*/
		en_queue_command(ftp,"STOR CS00.jpg",FTP_SEND_FILE,ftp_on_data_send);

		/*Add quit command to close FTP server.*/
		en_queue_command(ftp,"quit",FTP_QUIT,0);
	}
	else
		printf("\nFail to Open FTP client");
}
/************************************************************************
/*	Function Name : ftp_task											*
/*																		*
/*	Arguments : 														*
/*			st_ftp *ftp:Point to st_ftp structure.						*
/*	Return : 															*
/*			None.														*
/*																		*
/*  Comment :															*
/*		This function check FTP	status and display message.				*
/*																		*
/************************************************************************/
void ftp_task(st_ftp *ftp)
{
TSOCK *socket;
		socket=ftp->Command_socket;
		/*FTP client is stop by quit command , that mean all command have finished.*/
		if (ftp->status==FTP_STOP_BY_QUIT)
		{
			printf("\n FTP successful");
			ftp->status=FTP_STOP;
		}
		/*
			Some error occure and FTP client is stop.
			You can see last st_ftp.last_command and st_ftp.ftp->last_return_code
			to debug.
		*/
		else if (ftp->status==FTP_STOP_BY_ERROR)
		{
			printf("\nFTP TCP Socket Error");
			printf("\nFTP last command is:%s",ftp->last_command);
			printf("\nFTP server return code is:%s",ftp->last_return_code);
			ftp->status=FTP_STOP;
		}
		else if ((socket->state==TCP_CLOSED)&&(ftp->status!=FTP_STOP))
		{
			printf("\nCan't connect to FTP Server");
			ftp->status=FTP_STOP;
		}
}