1 /*
2 * Copyright (c) 1996, 1998 by Internet Software Consortium.
3 *
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
9 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
10 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
11 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
12 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
13 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
14 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
15 * SOFTWARE.
16 */
17
18 #include <sys/types.h>
19 #include <sys/param.h>
20 #include <sys/socket.h>
21 #include <netinet/in.h>
22 #include <arpa/inet.h>
23 #include <arpa/nameser.h>
24 #include <ctype.h>
25 #include <resolv.h>
26
27 static char
xtob(register int c)28 xtob(
29 register int c
30 )
31 {
32 return (char)(c - (((c >= '0') && (c <= '9')) ? '0' : '7'));
33 }
34
35 u_int
inet_nsap_addr(const char * ascii,u_char * binary,int maxlen)36 inet_nsap_addr(
37 const char *ascii,
38 u_char *binary,
39 int maxlen
40 )
41 {
42 u_char c, nib;
43 u_int len = 0;
44
45 while ((c = *ascii++) != '\0' && len < (u_int)maxlen) {
46 if (c == '.' || c == '+' || c == '/')
47 continue;
48 if (!isascii(c))
49 return (0);
50 if (islower(c))
51 c = (u_char)( toupper(c));
52 if (isxdigit(c)) {
53 nib = xtob(c);
54 c = *ascii++;
55 if (c != '\0') {
56 c = (u_char)( toupper(c));
57 if (isxdigit(c)) {
58 *binary++ = (nib << 4) | xtob(c);
59 len++;
60 } else
61 return (0);
62 }
63 else
64 return (0);
65 }
66 else
67 return (0);
68 }
69 return (len);
70 }
71
72 char *
inet_nsap_ntoa(int binlen,register const u_char * binary,register char * ascii)73 inet_nsap_ntoa(
74 int binlen,
75 register const u_char *binary,
76 register char *ascii
77 )
78 {
79 register int nib;
80 int i;
81 static char tmpbuf[255*3];
82 char *start;
83
84 if (ascii)
85 start = ascii;
86 else {
87 ascii = tmpbuf;
88 start = tmpbuf;
89 }
90
91 if (binlen > 255)
92 binlen = 255;
93
94 for (i = 0; i < binlen; i++) {
95 nib = *binary >> 4;
96 *ascii++ = (char)( nib + (nib < 10 ? '0' : '7'));
97 nib = *binary++ & 0x0f;
98 *ascii++ = (char)( nib + (nib < 10 ? '0' : '7'));
99 if (((i % 2) == 0 && (i + 1) < binlen))
100 *ascii++ = '.';
101 }
102 *ascii = '\0';
103 return (start);
104 }
105