www.pudn.com > tcpipsim.rar > addr_conv.c

/**************************************************************** 
 * 
 *	Copyleft (C) 2005 Wangcf, No Right Reserved 
 *		E-mail: wangcf@publicb.bta.net.cn 
 * 
 * $Revision: 1.1.1.1 $ 
 * 
 *	PURPOSE: 
 *		Enter file description here 
 * 
 *	MODIFICATION HISTORY 
 * $Log: addr_conv.c,v $ 
 * Revision 1.1.1.1  2005/09/06 16:40:11  wangcf 
 * initial version 
 * 
 * 
****************************************************************/ 
 
#include  
 
#include "addr_conv.h" 
#include  
#include  
#include  
 
/* convert binary mac address to string */ 
char *mac_ntoa(char *mac, char *buf) 
{ 
	assert (buf!=NULL); 
	assert (mac!=NULL); 
	 
	sprintf(buf, "%02x:%02x:%02x:%02x:%02x:%02x", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]); 
 
	return buf; 
} 
 
/* converc mac address string to binary */ 
void mac_aton(char *buf, char *mac) 
{ 
	u_int tmp_mac[6]; 
 
	assert (buf!=NULL); 
	assert (mac!=NULL); 
 
	memset(tmp_mac, 0, sizeof(tmp_mac)); 
 
	if (sscanf(buf, "%x:%x:%x:%x:%x:%x", tmp_mac, tmp_mac+1, tmp_mac+2,  
		tmp_mac+3, tmp_mac+4, tmp_mac+5) == 6) 
	{ 
		mac[0] = (char)tmp_mac[0]; 
		mac[1] = (char)tmp_mac[1]; 
		mac[2] = (char)tmp_mac[2]; 
		mac[3] = (char)tmp_mac[3]; 
		mac[4] = (char)tmp_mac[4]; 
		mac[5] = (char)tmp_mac[5]; 
	} 
 
	return; 
} 
 
 
/* convert ip address to dot seperated string */ 
char *ip_ntoa(u_int ipaddr, char *buf) 
{ 
	assert (buf!=NULL); 
 
	sprintf(buf, "%d.%d.%d.%d", (ipaddr>>24)&0xff, (ipaddr>>16)&0xff, (ipaddr>>8)&0xff, (ipaddr)&0xff); 
 
	return buf; 
} 
 
 
/* convert dot seperated string to ip address */ 
u_int ip_aton(char *buf, u_int *ipaddr) 
{ 
	u_int tmp_addr[4]; 
	u_int addr; 
 
	assert (buf!=NULL); 
 
	sscanf(buf, "%d.%d.%d.%d", tmp_addr, tmp_addr+1, tmp_addr+2, tmp_addr+3); 
	addr = (tmp_addr[0]<<24)+(tmp_addr[1]<<16)+(tmp_addr[2]<<8)+(tmp_addr[3]); 
	if (ipaddr!=NULL) 
	{ 
		*ipaddr = addr; 
	} 
 
	return addr; 
}