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 1.5 2005/07/28 06:51:48 marka Exp $";
20#endif /* LIBC_SCCS and not lint */
21
22#include "port_before.h"
23
24#include <sys/types.h>
25#include <sys/param.h>
26#include <sys/socket.h>
27
28#include <netinet/in.h>
29#include <arpa/inet.h>
30#include <arpa/nameser.h>
31
32#include <ctype.h>
33#include <resolv.h>
34#include <resolv_mt.h>
35
36#include "port_after.h"
37
38static char
39xtob(int c) {
40	return (c - (((c >= '0') && (c <= '9')) ? '0' : '7'));
41}
42
43u_int
44inet_nsap_addr(const char *ascii, u_char *binary, int maxlen) {
45	u_char c, nib;
46	u_int len = 0;
47
48	if (ascii[0] != '0' || (ascii[1] != 'x' && ascii[1] != 'X'))
49		return (0);
50	ascii += 2;
51
52	while ((c = *ascii++) != '\0' && len < (u_int)maxlen) {
53		if (c == '.' || c == '+' || c == '/')
54			continue;
55		if (!isascii(c))
56			return (0);
57		if (islower(c))
58			c = toupper(c);
59		if (isxdigit(c)) {
60			nib = xtob(c);
61			c = *ascii++;
62			if (c != '\0') {
63				c = toupper(c);
64				if (isxdigit(c)) {
65					*binary++ = (nib << 4) | xtob(c);
66					len++;
67				} else
68					return (0);
69			}
70			else
71				return (0);
72		}
73		else
74			return (0);
75	}
76	return (len);
77}
78
79char *
80inet_nsap_ntoa(int binlen, const u_char *binary, char *ascii) {
81	int nib;
82	int i;
83	char *tmpbuf = inet_nsap_ntoa_tmpbuf;
84	char *start;
85
86	if (ascii)
87		start = ascii;
88	else {
89		ascii = tmpbuf;
90		start = tmpbuf;
91	}
92
93	*ascii++ = '0';
94	*ascii++ = 'x';
95
96	if (binlen > 255)
97		binlen = 255;
98
99	for (i = 0; i < binlen; i++) {
100		nib = *binary >> 4;
101		*ascii++ = nib + (nib < 10 ? '0' : '7');
102		nib = *binary++ & 0x0f;
103		*ascii++ = nib + (nib < 10 ? '0' : '7');
104		if (((i % 2) == 0 && (i + 1) < binlen))
105			*ascii++ = '.';
106	}
107	*ascii = '\0';
108	return (start);
109}
110
111#undef inet_nsap_addr
112#pragma weak inet_nsap_addr = __inet_nsap_addr
113#undef inet_nsap_ntoa
114#pragma weak inet_nsap_ntoa = __inet_nsap_ntoa
115