2005-02-25 Roland McGrath <roland@redhat.com>
[glibc.git] / resolv / nsap_addr.c
blob7041e5282ebae4ed3cc9bf91374d0ce24258aff8
1 /*
2 * Copyright (c) 1996-1999 by Internet Software Consortium.
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.
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.
18 #if defined(LIBC_SCCS) && !defined(lint)
19 static const char rcsid[] = "$BINDId: nsap_addr.c,v 8.10 1999/10/13 16:39:28 vixie Exp $";
20 #endif /* LIBC_SCCS and not lint */
22 #include <sys/types.h>
23 #include <sys/param.h>
24 #include <sys/socket.h>
26 #include <netinet/in.h>
27 #include <arpa/inet.h>
28 #include <arpa/nameser.h>
30 #include <ctype.h>
31 #include <resolv.h>
33 static char
34 xtob(int c) {
35 return (c - (((c >= '0') && (c <= '9')) ? '0' : '7'));
38 u_int
39 inet_nsap_addr(const char *ascii, u_char *binary, int maxlen) {
40 u_char c, nib;
41 u_int len = 0;
43 while ((c = *ascii++) != '\0' && len < (u_int)maxlen) {
44 if (c == '.' || c == '+' || c == '/')
45 continue;
46 if (!isascii(c))
47 return (0);
48 c = toupper(c);
49 if (isxdigit(c)) {
50 nib = xtob(c);
51 c = *ascii++;
52 if (c != '\0') {
53 c = toupper(c);
54 if (isxdigit(c)) {
55 *binary++ = (nib << 4) | xtob(c);
56 len++;
57 } else
58 return (0);
60 else
61 return (0);
63 else
64 return (0);
66 return (len);
69 char *
70 inet_nsap_ntoa(int binlen, const u_char *binary, char *ascii) {
71 int nib;
72 int i;
73 static char tmpbuf[255*2 + 128];
74 char *start;
76 if (ascii)
77 start = ascii;
78 else {
79 ascii = tmpbuf;
80 start = tmpbuf;
83 if (binlen > 255)
84 binlen = 255;
86 for (i = 0; i < binlen; i++) {
87 nib = *binary >> 4;
88 *ascii++ = nib + (nib < 10 ? '0' : '7');
89 nib = *binary++ & 0x0f;
90 *ascii++ = nib + (nib < 10 ? '0' : '7');
91 if (((i % 2) == 0 && (i + 1) < binlen))
92 *ascii++ = '.';
94 *ascii = '\0';
95 return (start);