1 /*-
2 * SPDX-License-Identifier: ISC
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 #include <sys/cdefs.h>
24 #include "port_before.h"
25
26 #include <sys/param.h>
27 #include <sys/socket.h>
28
29 #include <netinet/in.h>
30 #include <arpa/inet.h>
31 #include <arpa/nameser.h>
32
33 #include <ctype.h>
34 #include <resolv.h>
35 #include <resolv_mt.h>
36
37 #include "port_after.h"
38
39 static char
xtob(int c)40 xtob(int c) {
41 return (c - (((c >= '0') && (c <= '9')) ? '0' : '7'));
42 }
43
44 u_int
inet_nsap_addr(const char * ascii,u_char * binary,int maxlen)45 inet_nsap_addr(const char *ascii, u_char *binary, int maxlen) {
46 u_char c, nib;
47 u_int len = 0;
48
49 if (ascii[0] != '0' || (ascii[1] != 'x' && ascii[1] != 'X'))
50 return (0);
51 ascii += 2;
52
53 while ((c = *ascii++) != '\0' && len < (u_int)maxlen) {
54 if (c == '.' || c == '+' || c == '/')
55 continue;
56 if (!isascii(c))
57 return (0);
58 if (islower(c))
59 c = toupper(c);
60 if (isxdigit(c)) {
61 nib = xtob(c);
62 c = *ascii++;
63 if (c != '\0') {
64 c = toupper(c);
65 if (isxdigit(c)) {
66 *binary++ = (nib << 4) | xtob(c);
67 len++;
68 } else
69 return (0);
70 }
71 else
72 return (0);
73 }
74 else
75 return (0);
76 }
77 return (len);
78 }
79
80 char *
inet_nsap_ntoa(int binlen,const u_char * binary,char * ascii)81 inet_nsap_ntoa(int binlen, const u_char *binary, char *ascii) {
82 int nib;
83 int i;
84 char *tmpbuf = inet_nsap_ntoa_tmpbuf;
85 char *start;
86
87 if (ascii)
88 start = ascii;
89 else {
90 ascii = tmpbuf;
91 start = tmpbuf;
92 }
93
94 *ascii++ = '0';
95 *ascii++ = 'x';
96
97 if (binlen > 255)
98 binlen = 255;
99
100 for (i = 0; i < binlen; i++) {
101 nib = *binary >> 4;
102 *ascii++ = nib + (nib < 10 ? '0' : '7');
103 nib = *binary++ & 0x0f;
104 *ascii++ = nib + (nib < 10 ? '0' : '7');
105 if (((i % 2) == 0 && (i + 1) < binlen))
106 *ascii++ = '.';
107 }
108 *ascii = '\0';
109 return (start);
110 }
111
112 /*
113 * Weak aliases for applications that use certain private entry points,
114 * and fail to include <arpa/inet.h>.
115 */
116 #undef inet_nsap_addr
117 __weak_reference(__inet_nsap_addr, inet_nsap_addr);
118 #undef inet_nsap_ntoa
119 __weak_reference(__inet_nsap_ntoa, inet_nsap_ntoa);
120
121 /*! \file */
122