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