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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 1990 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* All routines necessary to deal with the file /etc/ethers. The file
* contains mappings from 48 bit ethernet addresses to their corresponding
* hosts name. The addresses have an ascii representation of the form
* "x:x:x:x:x:x" where x is a hex number between 0x00 and 0xff; the
* bytes are always in network order.
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <net/if_arp.h>
#include <netinet/if_ether.h>
static char *domain; /* NIS domain name */
static int usingyellow;
static char *ethers = "/etc/ethers";
/*
* Parses a line from /etc/ethers into its components. The line has the form
* 8:0:20:1:17:c8 krypton
* where the first part is a 48 bit ethernet addrerss and the second is
* the corresponding hosts name.
* Returns zero if successful, non-zero otherwise.
*
* Arguments
* s: the string to be parsed
* e: ethernet address struct to be filled in
* hostname: hosts name to be set
*/
int
ether_line(char *s, struct ether_addr *e, char *hostname)
{
int i;
unsigned int t[6];
i = sscanf(s, " %x:%x:%x:%x:%x:%x %s",
&t[0], &t[1], &t[2], &t[3], &t[4], &t[5], hostname);
if (i != 7) {
return (7 - i);
}
for (i = 0; i < 6; i++)
e->ether_addr_octet[i] = t[i];
return (0);
}
/*
* Converts a 48 bit ethernet number to its string representation.
*/
#define EI(i) (unsigned int)(e->ether_addr_octet[(i)])
char *
ether_ntoa(struct ether_addr *e)
{
static char *s;
if (s == 0) {
s = (char *)malloc(18);
if (s == 0)
return (0);
}
s[0] = 0;
sprintf(s, "%x:%x:%x:%x:%x:%x",
EI(0), EI(1), EI(2), EI(3), EI(4), EI(5));
return (s);
}
/*
* Converts a ethernet address representation back into its 48 bits.
*/
struct ether_addr *
ether_aton(char *s)
{
static struct ether_addr *ep;
int i;
unsigned int t[6];
if (ep == 0) {
ep = (struct ether_addr *)calloc(1, sizeof (struct ether_addr));
if (ep == 0)
return (0);
}
i = sscanf(s, " %x:%x:%x:%x:%x:%x",
&t[0], &t[1], &t[2], &t[3], &t[4], &t[5]);
if (i != 6)
return ((struct ether_addr *)NULL);
for (i = 0; i < 6; i++)
ep->ether_addr_octet[i] = t[i];
return (ep);
}
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