www.pudn.com > ARM_RTL8019.rar > ICMP.C

#define ICMP_GLOBALS 
#include "config.h" 
#include "cfg_net.h" 
 
/* 
void memcpy(void *s1, const void *s2, int n) 
{ 
	int i; 
 
	for (i = 0; i < n; i++) 
		((char *)(s1))[i] = ((const char *)(s2))[i]; 
} 
*/ 
 
/********************************************************************** 
**º¯ÊýÔ­ÐÍ£º    void 	CreateIcmpCrc( ) 
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**·µ »Ø Öµ£º	crc £º  16λµÄУÑéºÍ         
**˵    Ã÷£º	²úÉúICMPÊý¾Ý¶ÎµÄУÑéºÍ  
************************************************************************/ 
uint16  CreateIcmpCrc(union icmp_rc icmppk)  
{ 
uint8 i; 
union  w  CrcTemp; 
CrcTemp.dwords=0; 
for(i=0;i<20;i++)				//ÓÃÓÚ²éѯµÄICMP±¨ÎĹ²40×Ö½Ú 
	{ 
	CrcTemp.dwords = CrcTemp.dwords + icmppk.words.wordbuf[i]; 
	} 
while(CrcTemp.words.high>0)  
	{ 
    CrcTemp.dwords = (uint32)(CrcTemp.words.high+CrcTemp.words.low); 
    } 
CrcTemp.words.low = 0xffff - CrcTemp.words.low;  //Çó·´Âë 
return(CrcTemp.words.low); 
} 
 
/* 
uint16  CreateIcmpCrc1(union icmp_rc icmppk)  
{ 
uint8 i; 
union  w  CrcTemp; 
CrcTemp.dwords=0; 
for(i=0;i<18;i++)				//ÓÃÓÚ²éѯµÄICMP±¨ÎĹ²40×Ö½Ú 
	{ 
	CrcTemp.dwords = CrcTemp.dwords + icmppk.words.wordbuf[i]; 
	} 
while(CrcTemp.words.high>0)  
	{ 
    CrcTemp.dwords = (uint32)(CrcTemp.words.high+CrcTemp.words.low); 
    } 
CrcTemp.words.low = 0xffff - CrcTemp.words.low; 
return(CrcTemp.words.low); 
} 
*/ 
 
/********************************************************************** 
**º¯ÊýÔ­ÐÍ£º    void icmp_process(unsigned char  * ICMPSENDPTR) 
**Èë¿Ú²ÎÊý:º	* ICMPSENDPTR	:	Êý¾ÝÖ¸Õë 
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**·µ »Ø Öµ£º	ÎÞ     
**˵    Ã÷£º	´¦ÀíICMP°ü  
************************************************************************/ 
void icmp_process(uint8  * ICMPSENDPTR,uint8 num)   
{ 
uint8 i,temp; 
struct _pkst SendIcmpData;   
	if(((icmppro*)ICMPSENDPTR)->icmpf.e_icmp.type==0x08)//ÇëÇ󣡣¡ 
	{ 
		((icmppro*)ICMPSENDPTR)->icmpf.e_icmp.type=0;//»Ø¸´ 
		((icmppro*)ICMPSENDPTR)->ipf.e_ip.ttl--; 
		for (i = 0; i < 4; i++)//IP·­×ª 
    	{ 
        	temp = ((icmppro*)ICMPSENDPTR)->ipf.e_ip.SourceIp[i]; 
        	((icmppro*)ICMPSENDPTR)->ipf.e_ip.SourceIp[i] = ((icmppro*)ICMPSENDPTR)->ipf.e_ip.DestId[i]; 
        	((icmppro*)ICMPSENDPTR)->ipf.e_ip.DestId[i] = temp; 
    	} 
		((icmppro*)ICMPSENDPTR)->ipf.e_ip.Crc=0;  //Éú³ÉipУÑéºÍ 
		 
		((icmppro*)ICMPSENDPTR)->ipf.e_ip.Crc=CreateIpHeadCrc(ICMPSENDPTR);//(((icmppro*)ICMPSENDPTR)->ipf); 
#ifdef Little_End 
		((icmppro*)ICMPSENDPTR)->ipf.e_ip.Crc=swap_int16(((icmppro*)ICMPSENDPTR)->ipf.e_ip.Crc); 
#endif 
		((icmppro*)ICMPSENDPTR)->icmpf.e_icmp.Crc=0; //Éú³ÉicmpУÑéºÍ 
		((icmppro*)ICMPSENDPTR)->icmpf.e_icmp.Crc=CreateIcmpCrc(((icmppro*)ICMPSENDPTR)->icmpf); 
		SendIcmpData.length=((icmppro*)ICMPSENDPTR)->ipf.e_ip.TotalLen; 
#ifdef Little_End 
		SendIcmpData.length=swap_int16(SendIcmpData.length); 
#endif 
		SendIcmpData.STPTR=NULL; 
		SendIcmpData.DAPTR=ICMPSENDPTR; 
 
		Send_Ip_To_LLC(&SendIcmpData,((icmppro*)ICMPSENDPTR)->ipf.e_ip.DestId,num); 
		//} 
	} 
	else if(((icmppro*)ICMPSENDPTR)->icmpf.e_icmp.type==0x00)//»Ø¸´ 
	{ 
		i=i; 
	} 
 
} 
 
/* 
void Icmp_Send(uint8 type,uint8 option,uint8 *so_ip,uint8 *de_ip, uint8 * REC_FRAME ) 
{ 
struct _pkst SendPingData; 
union icmp_rc IcmpPacked; 
//static uint16 temp_findex=0x2345; 
	 
	memcpy (&(IcmpPacked.e_icmp.icmpdata), REC_FRAME, 28); 
		 
	IcmpPacked.e_icmp.type=type; 
	IcmpPacked.e_icmp.option=option; 
	IcmpPacked.e_icmp.Crc=0; 
	IcmpPacked.e_icmp.id=0; 
	IcmpPacked.e_icmp.seq=0; 
	IcmpPacked.e_icmp.Crc=CreateIcmpCrc1(IcmpPacked); 
	SendPingData.length=36; 
	SendPingData.STPTR=NULL; 
	SendPingData.DAPTR=( uint8 * )&IcmpPacked; 
	Send_Ip_Frame	( 
			&SendPingData, 
			de_ip, 
			so_ip, 
			1 
		); 
} 
*/ 
/* 
void Ping_Precess(uint8 * de_ip,uint8 * so_ip)  
{ 
struct _pkst SendPingData; 
union icmp_rc IcmpPacked; 
static uint16 temp_findex=0x2345; 
IcmpPacked.e_icmp.type=0x08; 
IcmpPacked.e_icmp.option=0; 
IcmpPacked.e_icmp.Crc=0; 
#ifdef Big_End 
IcmpPacked.e_icmp.id=0x0300; 
#endif 
#ifdef Little_End 
IcmpPacked.e_icmp.id=0x0003; 
#endif 
IcmpPacked.e_icmp.seq=temp_findex++; 
IcmpPacked.e_icmp.Crc=CreateIcmpCrc(IcmpPacked); 
SendPingData.length=40; 
SendPingData.STPTR=NULL; 
SendPingData.DAPTR=( uint8 * )&IcmpPacked; 
Send_Ip_Frame	( 
			&SendPingData, 
			de_ip, 
			so_ip, 
			1 
		); 
} 
*/