1/*	$OpenBSD: print.c,v 1.11 2016/02/06 23:50:10 krw Exp $ */
2
3/* Turn data structures into printable text. */
4
5/*
6 * Copyright (c) 1995, 1996, 1997, 1998 The Internet Software Consortium.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of The Internet Software Consortium nor the names
19 *    of its contributors may be used to endorse or promote products derived
20 *    from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND
23 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
24 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED.  IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR
27 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
29 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
30 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
31 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
32 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
33 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * This software has been written for the Internet Software Consortium
37 * by Ted Lemon <mellon@fugue.com> in cooperation with Vixie
38 * Enterprises.  To learn more about the Internet Software Consortium,
39 * see ``http://www.vix.com/isc''.  To learn more about Vixie
40 * Enterprises, see ``http://www.vix.com''.
41 */
42
43#include <sys/types.h>
44#include <sys/socket.h>
45
46#include <net/if.h>
47
48#include <netinet/in.h>
49
50#include <stdio.h>
51#include <string.h>
52
53#include "dhcp.h"
54#include "tree.h"
55#include "dhcpd.h"
56
57char *
58print_hw_addr(int htype, int hlen, unsigned char *data)
59{
60	static char	habuf[49];
61	int		i, j, slen = sizeof(habuf);
62	char		*s = habuf;
63
64	if (htype == 0 || hlen == 0) {
65bad:
66		strlcpy(habuf, "<null>", sizeof habuf);
67		return habuf;
68	}
69
70	for (i = 0; i < hlen; i++) {
71		j = snprintf(s, slen, "%02x", data[i]);
72		if (j <= 0 || j >= slen)
73			goto bad;
74		j = strlen(s);
75		s += j;
76		slen -= (j + 1);
77		*s++ = ':';
78	}
79	*--s = '\0';
80	return habuf;
81}
82