libif.c

世纪民生公司的带网络功能的单片机CS6209开发smtp服务器演示源代码。网上基本上找不到的。

/*
 * 
 * libif.c
 * 
 * Part of the Myson Century CS620X	Ping demo program.
 *
 * Authors: LY Lin, WM Wang, IJ Chen, WH Lee
 *
 * libif.c contains ethernet and protocol stack interface routines.
 *
 * This	program	was developed using the Keil 8051 C uVision 2 system.
 * The Keil compiler MUST be used if working with Myson Century supplied
 * firmware.
 *
 * This	program	must be linked with the 620xlib.LIB library 
 * supplied	by Myson Century in object module form.  
 * 
 *
 * Note: Do not remove or rename any function or variable in this file.
*/

#define LIBIF_C
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>

#include "hpserver.h"
#include "620xenet.h"
#include "timer.h"
#include "ether.h"
#include "netutil.h"
#include "net.h"
#include "ip.h"
#include "tcp.h"
#include "config.h"

/* Frame for network Tx/Rx */
GENFRAME genframe;                  

/* My Ethernet and IP addresses */
NODE  locnode;                      
unsigned char gfp_buff_flag=0; 
/************************************************************************
/*	Function Name : locnode_n												*
/*																		*
/*	Arguments : 														*
/*			int n :locnode index to get.								* 
/*																		*
/*	Return :	 														*		
/*			Return ptr to local node 'n' (n=0 for first) or 			*
/* 			return 0 if doesn't exist									*
/*																		*
/*  Comment :															*
/*			This function Used by IP functions to get netmask & 		*
/*			gateway addresses. 											*
/*																		*
/************************************************************************/
NODE *locnode_n(int n)
{
    return(n==0 ? &locnode : 0);
}

/************************************************************************
/*	Function Name : server_action										*
/*																		*
/*	Arguments : 														*
/*			TSOCK *ts :Point to current socket.							* 
/*			CONN_STATE conn : connect state of current socket.			*
/*																		*
/*	Return :															*		
/*			Return 0 to prevent connection opening, or close 			*
/* 			if connected.												*
/*																		*
/*  Comment :															*
/*			This function upcall from TCP stack to server when opening, *
/*			connecting,receiving data or closing a port.				*
/*																		*
/************************************************************************/
int server_action(TSOCK *ts, CONN_STATE conn)
{
    WORD port;

	/* Uncomment this line to set the Urgent and Push Flag in the TCP/IP packet. */
	ts->connflags = ts->connflags|TURGE|TPUSH;

    port = ts->loc.port;

	return 0;
}

/************************************************************************
/*	Function Name : client_action										*
/*																		*
/*	Arguments : 														*
/*			TSOCK *ts :Point to current socket.							* 
/*			CONN_STATE conn : connect state of current socket.			*
/*																		*
/*	Return : 															*		
/*			Return 0 to prevent connection opening, or close 			*
/* 			if connected.												*
/*																		*
/*  Comment :															*
/*			This function upcall from TCP stack to client when opening, *
/*			connecting,receiving data or closing a port.				*
/*																		*
/************************************************************************/
int client_action(TSOCK *ts, CONN_STATE conn)
{
	/* Uncomment this line to set the Urgent and Push Flag in the TCP/IP packet. */
	 ts->connflags = ts->connflags|TURGE|TPUSH;  

	if (ts->upcall)
	    return (ts->upcall(ts,conn));
	/*client socket doesn't have upcall function.*/    
	return 0;  
}
/************************************************************************
/*	Function Name : get_frame											*
/*																		*
/*	Arguments : 														*
/*			GENFRAME xdata *gfp:Point to GENFRAME to return frame.		* 
/*																		*
/*	Return : 															*		
/*			The size in byte receive from network.						*
/*																		*
/*  Comment :															*
/*			This function gets an ethernet frame from the network. 		*
/* 			Return the frame length excluding the. hardware header.		*
/*																		*
/************************************************************************/
int get_frame (GENFRAME xdata *gfp)      
{

    /* check if anything is received on the Ethernet Interface*/

    if (gfp->g.dtype == DTYPE_ETHER)
       if ((gfp->g.len = Ethernet_Receive (gfp->buff))>0)
       {
          return (gfp->g.len - sizeof (ETHERHDR));
       }
    return (0);
}

/************************************************************************
/*	Function Name : put_frame											*
/*																		*
/*	Arguments : 														*
/*			GENFRAME xdata *gfp:Point to GENFRAME to be transmitted.	* 
/*			int len : The data length of gfp							*
/*																		*
/*	Return : 															*		
/*			The size size in byte transmit to network.					*
/*																		*
/*  Comment :															*
/*			This function aend an ethernet frame out onto the network.	*
/*																		*
/************************************************************************/
int put_frame (GENFRAME xdata *gfp, int len)  
{
	extern xdata unsigned char nic_xmit_buf [];
    int ret=0;
    if (len > 0)
    {
       /* wait until the last transmission is done*/
       while (!Ethernet_Transmit_Ready ());

       /* copy to a page-aligned buffer*/
/*		Edit by lin_jy 021219
       memcpy (nic_xmit_buf, gfp->buff, (WORD)len);

       ret = Ethernet_Transmit (nic_xmit_buf, (WORD)len);*/
		ret = Ethernet_Transmit (gfp->buff, (WORD)len);
		if (gfp_buff_flag)
		{
			gfp_buff_flag=0;
			gfp->buff=&nic_xmit_buf[0];
		}
		else
		{
			gfp_buff_flag=1;
			gfp->buff=&nic_xmit_buf[1536];
		}

    }

    return(ret);
}
/************************************************************************
/*	Function Name : udp_receive											*
/*																		*
/*	Arguments : 														*
/*			GENFRAME *gfp:Point to GENFRAME that contain UDP packet.	*
/*			int len : UDP data size.									*
/*																		*
/*	Return : 															*
/*			None.														*
/*																		*
/*  Comment :															*
/*			This function upcall from TCP stack to client when opening, *
/*			connecting,receiving data or closing a port.				*
/*																		*
/************************************************************************/
void udp_receive(GENFRAME *gfp, int len)
{
/*Below is a sample code for udp application*/
/*
    UDPKT *udp;
    NODE loc, rem;
    udp = getframe_datap(gfp);
    getudp_srce(gfp, &rem);     
    getudp_locdest(gfp, &loc);
*/	
	return ;
}