1/*
2 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (c) 1996-1999 by Internet Software Consortium.
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
15 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18#if defined(LIBC_SCCS) && !defined(lint)
19static const char rcsid[] = "$Id: nsap_addr.c,v 1.3.18.2 2005/07/28 07:38:08 marka Exp $";
20
21/* the algorithms only can deal with ASCII, so we optimize for it */
22#define USE_ASCII
23
24#endif /* LIBC_SCCS and not lint */
25#include <sys/cdefs.h>
26__FBSDID("$FreeBSD: src/lib/libc/inet/nsap_addr.c,v 1.3 2007/06/03 17:20:26 ume Exp $");
27
28#include "port_before.h"
29
30#include <sys/types.h>
31#include <sys/param.h>
32#include <sys/socket.h>
33
34#include <netinet/in.h>
35#include <arpa/inet.h>
36#include <arpa/nameser.h>
37
38#include <ctype.h>
39#include <resolv.h>
40//#include <resolv_mt.h>
41
42#include "port_after.h"
43
44#include <stdlib.h>
45
46static char
47xtob(int c) {
48	return (c - (((c >= '0') && (c <= '9')) ? '0' : '7'));
49}
50
51u_int
52inet_nsap_addr(const char *ascii, u_char *binary, int maxlen) {
53	u_char c, nib;
54	u_int len = 0;
55
56	if (ascii[0] != '0' || (ascii[1] != 'x' && ascii[1] != 'X'))
57		return (0);
58	ascii += 2;
59
60	while ((c = *ascii++) != '\0' && len < (u_int)maxlen) {
61		if (c == '.' || c == '+' || c == '/')
62			continue;
63		if (!isascii(c))
64			return (0);
65		if (islower(c))
66			c = toupper(c);
67		if (isxdigit(c)) {
68			nib = xtob(c);
69			c = *ascii++;
70			if (c != '\0') {
71				c = toupper(c);
72				if (isxdigit(c)) {
73					*binary++ = (nib << 4) | xtob(c);
74					len++;
75				} else
76					return (0);
77			}
78			else
79				return (0);
80		}
81		else
82			return (0);
83	}
84	return (len);
85}
86
87char *
88inet_nsap_ntoa(int binlen, const u_char *binary, char *ascii) {
89	int nib;
90	int i;
91	char *tmpbuf = NULL;
92	char *start;
93
94	if (tmpbuf == NULL) {
95		tmpbuf = malloc(255*3);
96		if (tmpbuf == NULL) return NULL;
97	}
98	if (ascii)
99		start = ascii;
100	else {
101		ascii = tmpbuf;
102		start = tmpbuf;
103	}
104
105	*ascii++ = '0';
106	*ascii++ = 'x';
107
108	if (binlen > 255)
109		binlen = 255;
110
111	for (i = 0; i < binlen; i++) {
112		nib = *binary >> 4;
113		*ascii++ = nib + (nib < 10 ? '0' : '7');
114		nib = *binary++ & 0x0f;
115		*ascii++ = nib + (nib < 10 ? '0' : '7');
116		if (((i % 2) == 0 && (i + 1) < binlen))
117			*ascii++ = '.';
118	}
119	*ascii = '\0';
120	return (start);
121}
122
123/*
124 * Weak aliases for applications that use certain private entry points,
125 * and fail to include <arpa/inet.h>.
126 */
127#undef inet_nsap_addr
128__weak_reference(__inet_nsap_addr, inet_nsap_addr);
129#undef inet_nsap_ntoa
130__weak_reference(__inet_nsap_ntoa, inet_nsap_ntoa);
131
132/*! \file */
133