Update.
[glibc.git] / resolv / nsap_addr.c
blob5f41a736d6972caf7c1c83effd16fb6a228a7880
1 /*
2 * Copyright (c) 1996 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 char rcsid[] = "$Id$";
20 #endif /* LIBC_SCCS and not lint */
22 #include <sys/types.h>
23 #include <sys/param.h>
24 #include <sys/socket.h>
25 #include <netinet/in.h>
26 #include <arpa/nameser.h>
27 #include <ctype.h>
28 #include <resolv.h>
30 #include "../conf/portability.h"
32 #if !defined(isxdigit) /* XXX - could be a function */
33 static int
34 isxdigit(c)
35 register int c;
37 return ((c >= '0') && (c <= '9')) || ((c >= 'A') && (c <= 'F'));
39 #endif
41 static char
42 xtob(c)
43 register int c;
45 return (c - (((c >= '0') && (c <= '9')) ? '0' : '7'));
48 u_int
49 inet_nsap_addr(ascii, binary, maxlen)
50 const char *ascii;
51 u_char *binary;
52 int maxlen;
54 register u_char c, nib;
55 u_int len = 0;
57 while ((c = *ascii++) != '\0' && (int) len < maxlen) {
58 if (c == '.' || c == '+' || c == '/')
59 continue;
60 if (!isascii(c))
61 return (0);
62 if (islower(c))
63 c = toupper(c);
64 if (isxdigit(c)) {
65 nib = xtob(c);
66 if (c = *ascii++) {
67 c = toupper(c);
68 if (isxdigit(c)) {
69 *binary++ = (nib << 4) | xtob(c);
70 len++;
71 } else
72 return (0);
74 else
75 return (0);
77 else
78 return (0);
80 return (len);
83 char *
84 inet_nsap_ntoa(binlen, binary, ascii)
85 int binlen;
86 register const u_char *binary;
87 register char *ascii;
89 register int nib;
90 int i;
91 static char tmpbuf[255*3];
92 char *start;
94 if (ascii)
95 start = ascii;
96 else {
97 ascii = tmpbuf;
98 start = tmpbuf;
101 if (binlen > 255)
102 binlen = 255;
104 for (i = 0; i < binlen; i++) {
105 nib = *binary >> 4;
106 *ascii++ = nib + (nib < 10 ? '0' : '7');
107 nib = *binary++ & 0x0f;
108 *ascii++ = nib + (nib < 10 ? '0' : '7');
109 if (((i % 2) == 0 && (i + 1) < binlen))
110 *ascii++ = '.';
112 *ascii = '\0';
113 return (start);