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/* $Id: ethers.c,v 1.1 2000/04/08 20:50:28 dugsong Exp $ */
/* $OpenBSD: ethers.c,v 1.10 1998/11/18 23:28:54 deraadt Exp $ */
/*
* Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* ethers(3) a la Sun.
* Originally Written by Roland McGrath <roland@frob.com> 10/14/93.
* Substantially modified by Todd C. Miller <Todd.Miller@courtesan.com>
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
char *
ether_ntoa(e)
struct ether_addr *e;
{
static char a[] = "xx:xx:xx:xx:xx:xx";
if (e->ether_addr_octet[0] > 0xFF || e->ether_addr_octet[1] > 0xFF ||
e->ether_addr_octet[2] > 0xFF || e->ether_addr_octet[3] > 0xFF ||
e->ether_addr_octet[4] > 0xFF || e->ether_addr_octet[5] > 0xFF) {
errno = EINVAL;
return (NULL);
}
(void)sprintf(a, "%02x:%02x:%02x:%02x:%02x:%02x",
e->ether_addr_octet[0], e->ether_addr_octet[1],
e->ether_addr_octet[2], e->ether_addr_octet[3],
e->ether_addr_octet[4], e->ether_addr_octet[5]);
return (a);
}
static char *
_ether_aton(s, e)
char *s;
struct ether_addr *e;
{
int i;
long l;
char *pp;
while (isspace(*s))
s++;
/* expect 6 hex octets separated by ':' or space/NUL if last octet */
for (i = 0; i < 6; i++) {
l = strtol(s, &pp, 16);
if (pp == s || l > 0xFF || l < 0)
return (NULL);
if (!(*pp == ':' || (i == 5 && (isspace(*pp) || *pp == '\0'))))
return (NULL);
e->ether_addr_octet[i] = (u_char)l;
s = pp + 1;
}
/* return character after the octets ala strtol(3) */
return (pp);
}
struct ether_addr *
ether_aton(s)
char *s;
{
static struct ether_addr n;
return (_ether_aton(s, &n) ? &n : NULL);
}
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