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 #include "port_before.h"
21
22 #include <sys/param.h>
23 #include <sys/socket.h>
24
25 #include <netinet/in.h>
26 #include <arpa/inet.h>
27 #include <arpa/nameser.h>
28
29 #include <ctype.h>
30 #include <resolv.h>
31 #include <resolv_mt.h>
32
33 #include "port_after.h"
34
35 static char
xtob(int c)36 xtob(int c) {
37 return (c - (((c >= '0') && (c <= '9')) ? '0' : '7'));
38 }
39
40 u_int
inet_nsap_addr(const char * ascii,u_char * binary,int maxlen)41 inet_nsap_addr(const char *ascii, u_char *binary, int maxlen) {
42 u_char c, nib;
43 u_int len = 0;
44
45 if (ascii[0] != '0' || (ascii[1] != 'x' && ascii[1] != 'X'))
46 return (0);
47 ascii += 2;
48
49 while ((c = *ascii++) != '\0' && len < (u_int)maxlen) {
50 if (c == '.' || c == '+' || c == '/')
51 continue;
52 if (!isascii(c))
53 return (0);
54 if (islower(c))
55 c = toupper(c);
56 if (isxdigit(c)) {
57 nib = xtob(c);
58 c = *ascii++;
59 if (c != '\0') {
60 c = toupper(c);
61 if (isxdigit(c)) {
62 *binary++ = (nib << 4) | xtob(c);
63 len++;
64 } else
65 return (0);
66 }
67 else
68 return (0);
69 }
70 else
71 return (0);
72 }
73 return (len);
74 }
75
76 char *
inet_nsap_ntoa(int binlen,const u_char * binary,char * ascii)77 inet_nsap_ntoa(int binlen, const u_char *binary, char *ascii) {
78 int nib;
79 int i;
80 char *tmpbuf = inet_nsap_ntoa_tmpbuf;
81 char *start;
82
83 if (ascii)
84 start = ascii;
85 else {
86 ascii = tmpbuf;
87 start = tmpbuf;
88 }
89
90 *ascii++ = '0';
91 *ascii++ = 'x';
92
93 if (binlen > 255)
94 binlen = 255;
95
96 for (i = 0; i < binlen; i++) {
97 nib = *binary >> 4;
98 *ascii++ = nib + (nib < 10 ? '0' : '7');
99 nib = *binary++ & 0x0f;
100 *ascii++ = nib + (nib < 10 ? '0' : '7');
101 if (((i % 2) == 0 && (i + 1) < binlen))
102 *ascii++ = '.';
103 }
104 *ascii = '\0';
105 return (start);
106 }
107
108 /*
109 * Weak aliases for applications that use certain private entry points,
110 * and fail to include <arpa/inet.h>.
111 */
112 #undef inet_nsap_addr
113 __weak_reference(__inet_nsap_addr, inet_nsap_addr);
114 #undef inet_nsap_ntoa
115 __weak_reference(__inet_nsap_ntoa, inet_nsap_ntoa);
116
117 /*! \file */
118