1 /* $NetBSD: nsap_addr.c,v 1.1.1.2 2012/09/09 16:07:50 christos Exp $ */
2
3 /*
4 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
5 * Copyright (c) 1996-1999 by Internet Software Consortium.
6 *
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
17 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 */
19
20 #if defined(LIBC_SCCS) && !defined(lint)
21 static const char rcsid[] = "Id: nsap_addr.c,v 1.5 2005/07/28 06:51:48 marka Exp ";
22 #endif /* LIBC_SCCS and not lint */
23
24 #include "port_before.h"
25
26 #include <sys/types.h>
27 #include <sys/param.h>
28 #include <sys/socket.h>
29
30 #include <netinet/in.h>
31 #include <arpa/inet.h>
32 #include <arpa/nameser.h>
33
34 #include <ctype.h>
35 #include <resolv.h>
36 #include <resolv_mt.h>
37
38 #include "port_after.h"
39
40 static char
xtob(int c)41 xtob(int c) {
42 return (c - (((c >= '0') && (c <= '9')) ? '0' : '7'));
43 }
44
45 u_int
inet_nsap_addr(const char * ascii,u_char * binary,int maxlen)46 inet_nsap_addr(const char *ascii, u_char *binary, int maxlen) {
47 u_char c, nib;
48 u_int len = 0;
49
50 if (ascii[0] != '0' || (ascii[1] != 'x' && ascii[1] != 'X'))
51 return (0);
52 ascii += 2;
53
54 while ((c = *ascii++) != '\0' && len < (u_int)maxlen) {
55 if (c == '.' || c == '+' || c == '/')
56 continue;
57 if (!isascii(c))
58 return (0);
59 if (islower(c))
60 c = toupper(c);
61 if (isxdigit(c)) {
62 nib = xtob(c);
63 c = *ascii++;
64 if (c != '\0') {
65 c = toupper(c);
66 if (isxdigit(c)) {
67 *binary++ = (nib << 4) | xtob(c);
68 len++;
69 } else
70 return (0);
71 }
72 else
73 return (0);
74 }
75 else
76 return (0);
77 }
78 return (len);
79 }
80
81 char *
inet_nsap_ntoa(int binlen,const u_char * binary,char * ascii)82 inet_nsap_ntoa(int binlen, const u_char *binary, char *ascii) {
83 int nib;
84 int i;
85 char *tmpbuf = inet_nsap_ntoa_tmpbuf;
86 char *start;
87
88 if (ascii)
89 start = ascii;
90 else {
91 ascii = tmpbuf;
92 start = tmpbuf;
93 }
94
95 *ascii++ = '0';
96 *ascii++ = 'x';
97
98 if (binlen > 255)
99 binlen = 255;
100
101 for (i = 0; i < binlen; i++) {
102 nib = *binary >> 4;
103 *ascii++ = nib + (nib < 10 ? '0' : '7');
104 nib = *binary++ & 0x0f;
105 *ascii++ = nib + (nib < 10 ? '0' : '7');
106 if (((i % 2) == 0 && (i + 1) < binlen))
107 *ascii++ = '.';
108 }
109 *ascii = '\0';
110 return (start);
111 }
112
113 /*! \file */
114