1/*	$NetBSD: nsap_addr.c,v 1.1.1.4 2009/04/12 16:35:45 christos Exp $	*/
2
3/*
4 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
5 * Copyright (c) 1996-1999 by Internet Software Consortium.
6 *
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
17 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 */
19
20#include <sys/cdefs.h>
21#if defined(LIBC_SCCS) && !defined(lint)
22#if 0
23static const char rcsid[] = "Id: nsap_addr.c,v 1.5 2005/07/28 06:51:48 marka Exp";
24#else
25__RCSID("$NetBSD: nsap_addr.c,v 1.5 2008/06/21 20:41:48 christos Exp $");
26#endif
27#endif /* LIBC_SCCS and not lint */
28
29#include "port_before.h"
30
31#include "namespace.h"
32#include <sys/types.h>
33#include <sys/param.h>
34#include <sys/socket.h>
35
36#include <netinet/in.h>
37#include <arpa/inet.h>
38#include <arpa/nameser.h>
39
40#include <assert.h>
41#include <ctype.h>
42#include <resolv.h>
43#include <resolv_mt.h>
44
45#include "port_after.h"
46
47#ifdef __weak_alias
48__weak_alias(inet_nsap_addr,_inet_nsap_addr)
49__weak_alias(inet_nsap_ntoa,_inet_nsap_ntoa)
50#endif
51
52static char
53xtob(int c) {
54	return (c - (((c >= '0') && (c <= '9')) ? '0' : '7'));
55}
56
57u_int
58inet_nsap_addr(const char *ascii, u_char *binary, int maxlen) {
59	u_char c, nib;
60	u_int len = 0;
61
62	_DIAGASSERT(ascii != NULL);
63	_DIAGASSERT(binary != NULL);
64
65	if (ascii[0] != '0' || (ascii[1] != 'x' && ascii[1] != 'X'))
66		return (0);
67	ascii += 2;
68
69	while ((c = *ascii++) != '\0' && len < (u_int)maxlen) {
70		if (c == '.' || c == '+' || c == '/')
71			continue;
72		if (!isascii(c))
73			return (0);
74		if (islower(c))
75			c = toupper(c);
76		if (isxdigit(c)) {
77			nib = xtob(c);
78			c = *ascii++;
79			if (c != '\0') {
80				c = toupper(c);
81				if (isxdigit(c)) {
82					*binary++ = (nib << 4) | xtob(c);
83					len++;
84				} else
85					return (0);
86			}
87			else
88				return (0);
89		}
90		else
91			return (0);
92	}
93	return (len);
94}
95
96char *
97inet_nsap_ntoa(int binlen, const u_char *binary, char *ascii) {
98	int nib;
99	int i;
100	char *tmpbuf = inet_nsap_ntoa_tmpbuf;
101	char *start;
102
103	_DIAGASSERT(binary != NULL);
104
105	if (ascii)
106		start = ascii;
107	else {
108		ascii = tmpbuf;
109		start = tmpbuf;
110	}
111
112	*ascii++ = '0';
113	*ascii++ = 'x';
114
115	if (binlen > 255)
116		binlen = 255;
117
118	for (i = 0; i < binlen; i++) {
119		nib = (u_int32_t)*binary >> 4;
120		*ascii++ = nib + (nib < 10 ? '0' : '7');
121		nib = *binary++ & 0x0f;
122		*ascii++ = nib + (nib < 10 ? '0' : '7');
123		if (((i % 2) == 0 && (i + 1) < binlen))
124			*ascii++ = '.';
125	}
126	*ascii = '\0';
127	return (start);
128}
129
130/*! \file */
131