Annotation of src/lib/libc/inet/nsap_addr.c, Revision 1.2
1.1 christos 1: /* $NetBSD: nsap_addr.c,v 1.1.1.1 2004/05/17 23:44:44 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:
1.2 ! christos 20: #include <sys/cdefs.h>
1.1 christos 21: #if defined(LIBC_SCCS) && !defined(lint)
1.2 ! christos 22: #if 0
1.1 christos 23: static const char rcsid[] = "Id: nsap_addr.c,v 1.2.206.1 2004/03/09 08:33:33 marka Exp";
1.2 ! christos 24: #else
! 25: __RCSID("$NetBSD$");
! 26: #endif
1.1 christos 27: #endif /* LIBC_SCCS and not lint */
28:
29: #include "port_before.h"
30:
1.2 ! christos 31: #include "namespace.h"
1.1 christos 32: #include <sys/types.h>
33: #include <sys/param.h>
34: #include <sys/socket.h>
35:
36: #include <netinet/in.h>
37: #include <arpa/inet.h>
38: #include <arpa/nameser.h>
39:
1.2 ! christos 40: #include <assert.h>
1.1 christos 41: #include <ctype.h>
42: #include <resolv.h>
43:
44: #include "port_after.h"
45:
1.2 ! christos 46: #ifdef __weak_alias
! 47: __weak_alias(inet_nsap_addr,_inet_nsap_addr)
! 48: __weak_alias(inet_nsap_ntoa,_inet_nsap_ntoa)
! 49: #endif
! 50:
1.1 christos 51: static char
52: xtob(int c) {
53: return (c - (((c >= '0') && (c <= '9')) ? '0' : '7'));
54: }
55:
56: u_int
57: inet_nsap_addr(const char *ascii, u_char *binary, int maxlen) {
58: u_char c, nib;
59: u_int len = 0;
60:
1.2 ! christos 61: _DIAGASSERT(ascii != NULL);
! 62: _DIAGASSERT(binary != NULL);
! 63:
1.1 christos 64: if (ascii[0] != '0' || (ascii[1] != 'x' && ascii[1] != 'X'))
65: return (0);
66: ascii += 2;
67:
68: while ((c = *ascii++) != '\0' && len < (u_int)maxlen) {
69: if (c == '.' || c == '+' || c == '/')
70: continue;
71: if (!isascii(c))
72: return (0);
73: if (islower(c))
74: c = toupper(c);
75: if (isxdigit(c)) {
76: nib = xtob(c);
77: c = *ascii++;
78: if (c != '\0') {
79: c = toupper(c);
80: if (isxdigit(c)) {
81: *binary++ = (nib << 4) | xtob(c);
82: len++;
83: } else
84: return (0);
85: }
86: else
87: return (0);
88: }
89: else
90: return (0);
91: }
92: return (len);
93: }
94:
95: char *
96: inet_nsap_ntoa(int binlen, const u_char *binary, char *ascii) {
97: int nib;
98: int i;
99: static char tmpbuf[2+255*3];
100: char *start;
101:
1.2 ! christos 102: _DIAGASSERT(binary != NULL);
! 103:
1.1 christos 104: if (ascii)
105: start = ascii;
106: else {
107: ascii = tmpbuf;
108: start = tmpbuf;
109: }
110:
111: *ascii++ = '0';
112: *ascii++ = 'x';
113:
114: if (binlen > 255)
115: binlen = 255;
116:
117: for (i = 0; i < binlen; i++) {
1.2 ! christos 118: nib = (u_int32_t)*binary >> 4;
1.1 christos 119: *ascii++ = nib + (nib < 10 ? '0' : '7');
120: nib = *binary++ & 0x0f;
121: *ascii++ = nib + (nib < 10 ? '0' : '7');
122: if (((i % 2) == 0 && (i + 1) < binlen))
123: *ascii++ = '.';
124: }
125: *ascii = '\0';
126: return (start);
127: }
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