1/*	$NetBSD: iso_addr.c,v 1.11 2003/08/07 16:43:11 agc Exp $	*/
2
3/*
4 * Copyright (c) 1989, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33#if defined(LIBC_SCCS) && !defined(lint)
34#if 0
35static char sccsid[] = "@(#)iso_addr.c	8.1 (Berkeley) 6/4/93";
36#else
37__RCSID("$NetBSD: iso_addr.c,v 1.11 2003/08/07 16:43:11 agc Exp $");
38#endif
39#endif /* LIBC_SCCS and not lint */
40
41#include <sys/types.h>
42#include <netiso/iso.h>
43
44#include <assert.h>
45#include <string.h>
46
47/* States*/
48#define VIRGIN	0
49#define GOTONE	1
50#define GOTTWO	2
51/* Inputs */
52#define	DIGIT	(4*0)
53#define	END	(4*1)
54#define DELIM	(4*2)
55
56struct iso_addr *
57iso_addr(addr)
58	register const char *addr;
59{
60	static struct iso_addr out_addr;
61	register char *cp = out_addr.isoa_genaddr;
62	char *cplim = cp + sizeof(out_addr.isoa_genaddr);
63	register int byte = 0, state = VIRGIN;
64	register int newaddr = 0;	/* pacify gcc */
65
66	_DIAGASSERT(addr != NULL);
67
68	(void)memset(&out_addr, 0, sizeof (out_addr));
69	do {
70		if ((*addr >= '0') && (*addr <= '9')) {
71			newaddr = *addr - '0';
72		} else if ((*addr >= 'a') && (*addr <= 'f')) {
73			newaddr = *addr - 'a' + 10;
74		} else if ((*addr >= 'A') && (*addr <= 'F')) {
75			newaddr = *addr - 'A' + 10;
76		} else if (*addr == 0)
77			state |= END;
78		else
79			state |= DELIM;
80		addr++;
81		switch (state /* | INPUT */) {
82		case GOTTWO | DIGIT:
83			*cp++ = byte; /*FALLTHROUGH*/
84		case VIRGIN | DIGIT:
85			state = GOTONE; byte = newaddr; continue;
86		case GOTONE | DIGIT:
87			state = GOTTWO; byte = newaddr + (byte << 4); continue;
88		default: /* | DELIM */
89			state = VIRGIN; *cp++ = byte; byte = 0; continue;
90		case GOTONE | END:
91		case GOTTWO | END:
92			*cp++ = byte; /* FALLTHROUGH */
93		case VIRGIN | END:
94			break;
95		}
96		break;
97	} while (cp < cplim);
98	out_addr.isoa_len = cp - out_addr.isoa_genaddr;
99	return (&out_addr);
100}
101
102static const char hexlist[16] = "0123456789abcdef";
103
104char *
105iso_ntoa(isoa)
106	const struct iso_addr *isoa;
107{
108	static char obuf[64];
109	char *out = obuf;
110	size_t i;
111	const u_char *in = (const u_char *)isoa->isoa_genaddr;
112	const u_char *inlim = in + isoa->isoa_len;
113
114	_DIAGASSERT(isoa != NULL);
115
116	out[1] = 0;
117	while (in < inlim) {
118		i = *in++;
119		*out++ = '.';
120		if (i > 0xf) {
121			out[1] = hexlist[i & 0xf];
122			i >>= 4;
123			out[0] = hexlist[i];
124			out += 2;
125		} else
126			*out++ = hexlist[i];
127	}
128	*out = 0;
129	return(obuf + 1);
130}
131