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106 lines
3.2 KiB
106 lines
3.2 KiB
/* $Id: ethers.c,v 1.1.1.1 2006/09/14 01:59:06 root Exp $ */
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/* $OpenBSD: ethers.c,v 1.10 1998/11/18 23:28:54 deraadt Exp $ */
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/*
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* Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* ethers(3) a la Sun.
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* Originally Written by Roland McGrath <roland@frob.com> 10/14/93.
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* Substantially modified by Todd C. Miller <Todd.Miller@courtesan.com>
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*/
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <netinet/if_ether.h>
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#include <sys/param.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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static char * _ether_aton __P((char *, struct ether_addr *));
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char *
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ether_ntoa(e)
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struct ether_addr *e;
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{
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static char a[] = "xx:xx:xx:xx:xx:xx";
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if (e->ether_addr_octet[0] > 0xFF || e->ether_addr_octet[1] > 0xFF ||
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e->ether_addr_octet[2] > 0xFF || e->ether_addr_octet[3] > 0xFF ||
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e->ether_addr_octet[4] > 0xFF || e->ether_addr_octet[5] > 0xFF) {
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errno = EINVAL;
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return (NULL);
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}
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(void)sprintf(a, "%02x:%02x:%02x:%02x:%02x:%02x",
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e->ether_addr_octet[0], e->ether_addr_octet[1],
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e->ether_addr_octet[2], e->ether_addr_octet[3],
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e->ether_addr_octet[4], e->ether_addr_octet[5]);
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return (a);
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}
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static char *
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_ether_aton(s, e)
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char *s;
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struct ether_addr *e;
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{
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int i;
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long l;
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char *pp;
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while (isspace(*s))
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s++;
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/* expect 6 hex octets separated by ':' or space/NUL if last octet */
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for (i = 0; i < 6; i++) {
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l = strtol(s, &pp, 16);
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if (pp == s || l > 0xFF || l < 0)
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return (NULL);
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if (!(*pp == ':' || (i == 5 && (isspace(*pp) || *pp == '\0'))))
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return (NULL);
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e->ether_addr_octet[i] = (u_char)l;
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s = pp + 1;
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}
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/* return character after the octets ala strtol(3) */
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return (pp);
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}
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struct ether_addr *
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ether_aton(s)
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char *s;
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{
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static struct ether_addr n;
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return (_ether_aton(s, &n) ? &n : NULL);
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}
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