1/*
2 * Copyright (c) 1996-1999 by Internet Software Consortium.
3 *
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
9 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
10 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
11 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
12 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
13 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
14 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
15 * SOFTWARE.
16 */
17
18#include <sys/types.h>
19#include <sys/param.h>
20#include <sys/socket.h>
21
22#include <netinet/in.h>
23#include <arpa/inet.h>
24#include <arpa/nameser.h>
25
26#include <ctype.h>
27#include <resolv.h>
28
29static char
30xtob(int c) {
31 return (c - (((c >= '0') && (c <= '9')) ? '0' : '7'));
32}
33
34u_int
35inet_nsap_addr(const char *ascii, u_char *binary, int maxlen) {
36 u_char c, nib;
37 u_int len = 0;
38
39 while ((c = *ascii++) != '\0' && len < (u_int)maxlen) {
40 if (c == '.' || c == '+' || c == '/')
41 continue;
42 if (!isascii(c))
43 return (0);
44 c = toupper(c);
45 if (isxdigit(c)) {
46 nib = xtob(c);
47 c = *ascii++;
48 if (c != '\0') {
49 c = toupper(c);
50 if (isxdigit(c)) {
51 *binary++ = (nib << 4) | xtob(c);
52 len++;
53 } else
54 return (0);
55 }
56 else
57 return (0);
58 }
59 else
60 return (0);
61 }
62 return (len);
63}
64
65char *
66inet_nsap_ntoa(int binlen, const u_char *binary, char *ascii) {
67 int nib;
68 int i;
69 static char tmpbuf[255*2 + 128];
70 char *start;
71
72 if (ascii)
73 start = ascii;
74 else {
75 ascii = tmpbuf;
76 start = tmpbuf;
77 }
78
79 if (binlen > 255)
80 binlen = 255;
81
82 for (i = 0; i < binlen; i++) {
83 nib = *binary >> 4;
84 *ascii++ = nib + (nib < 10 ? '0' : '7');
85 nib = *binary++ & 0x0f;
86 *ascii++ = nib + (nib < 10 ? '0' : '7');
87 if (((i % 2) == 0 && (i + 1) < binlen))
88 *ascii++ = '.';
89 }
90 *ascii = '\0';
91 return (start);
92}
93