1 /* $NetBSD: nsap_addr.c,v 1.2 2004/05/20 23:12:33 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 #include <sys/cdefs.h>
21 #if defined(LIBC_SCCS) && !defined(lint)
22 #if 0
23 static const char rcsid[] = "Id: nsap_addr.c,v 1.2.206.1 2004/03/09 08:33:33 marka Exp";
24 #else
25 __RCSID("$NetBSD: nsap_addr.c,v 1.2 2004/05/20 23:12:33 christos Exp $");
26 #endif
27 #endif /* LIBC_SCCS and not lint */
28
29 #include <sys/types.h>
30 #include <sys/param.h>
31 #include <sys/socket.h>
32
33 #include <netinet/in.h>
34 #include <arpa/inet.h>
35 #include "arpa_nameser.h"
36
37 #include <assert.h>
38 #include <ctype.h>
39 #ifdef ANDROID_CHANGES
40 #include "resolv_private.h"
41 #else
42 #include <resolv.h>
43 #endif
44
45 static char
xtob(int c)46 xtob(int c) {
47 return (c - (((c >= '0') && (c <= '9')) ? '0' : '7'));
48 }
49
50 u_int
inet_nsap_addr(const char * ascii,u_char * binary,int maxlen)51 inet_nsap_addr(const char *ascii, u_char *binary, int maxlen) {
52 u_char c, nib;
53 u_int len = 0;
54
55 assert(ascii != NULL);
56 assert(binary != NULL);
57
58 if (ascii[0] != '0' || (ascii[1] != 'x' && ascii[1] != 'X'))
59 return (0);
60 ascii += 2;
61
62 while ((c = *ascii++) != '\0' && len < (u_int)maxlen) {
63 if (c == '.' || c == '+' || c == '/')
64 continue;
65 if (!isascii(c))
66 return (0);
67 if (islower(c))
68 c = toupper(c);
69 if (isxdigit(c)) {
70 nib = xtob(c);
71 c = *ascii++;
72 if (c != '\0') {
73 c = toupper(c);
74 if (isxdigit(c)) {
75 *binary++ = (nib << 4) | xtob(c);
76 len++;
77 } else
78 return (0);
79 }
80 else
81 return (0);
82 }
83 else
84 return (0);
85 }
86 return (len);
87 }
88
89 char *
inet_nsap_ntoa(int binlen,const u_char * binary,char * ascii)90 inet_nsap_ntoa(int binlen, const u_char *binary, char *ascii) {
91 int nib;
92 int i;
93 static char tmpbuf[2+255*3];
94 char *start;
95
96 assert(binary != NULL);
97
98 if (ascii)
99 start = ascii;
100 else {
101 ascii = tmpbuf;
102 start = tmpbuf;
103 }
104
105 *ascii++ = '0';
106 *ascii++ = 'x';
107
108 if (binlen > 255)
109 binlen = 255;
110
111 for (i = 0; i < binlen; i++) {
112 nib = (u_int32_t)*binary >> 4;
113 *ascii++ = nib + (nib < 10 ? '0' : '7');
114 nib = *binary++ & 0x0f;
115 *ascii++ = nib + (nib < 10 ? '0' : '7');
116 if (((i % 2) == 0 && (i + 1) < binlen))
117 *ascii++ = '.';
118 }
119 *ascii = '\0';
120 return (start);
121 }
122