1 /*
2 * ++Copyright++ 1985, 1988, 1993
3 * -
4 * Copyright (c) 1985, 1988, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Portions copyright (c) 1999, 2000
8 * Intel Corporation.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 *
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 *
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 *
22 * 3. All advertising materials mentioning features or use of this software
23 * must display the following acknowledgement:
24 *
25 * This product includes software developed by the University of
26 * California, Berkeley, Intel Corporation, and its contributors.
27 *
28 * 4. Neither the name of University, Intel Corporation, or their respective
29 * contributors may be used to endorse or promote products derived from
30 * this software without specific prior written permission.
31 *
32 * THIS SOFTWARE IS PROVIDED BY THE REGENTS, INTEL CORPORATION AND
33 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
34 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
35 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS,
36 * INTEL CORPORATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
37 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
38 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
39 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
40 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
41 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
42 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
43 * -
44 * Portions Copyright (c) 1993 by Digital Equipment Corporation.
45 *
46 * Permission to use, copy, modify, and distribute this software for any
47 * purpose with or without fee is hereby granted, provided that the above
48 * copyright notice and this permission notice appear in all copies, and that
49 * the name of Digital Equipment Corporation not be used in advertising or
50 * publicity pertaining to distribution of the document or software without
51 * specific, written prior permission.
52 *
53 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
54 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
55 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
56 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
57 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
58 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
59 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
60 * SOFTWARE.
61 * -
62 * --Copyright--
63 */
64
65 #if defined(LIBC_SCCS) && !defined(lint)
66 static char sccsid[] = "@(#)gethostnamadr.c 8.1 (Berkeley) 6/4/93";
67 static char rcsid[] = "$Id: map_v4v6.c,v 1.1.1.1 2003/11/19 01:51:31 kyu3 Exp $";
68 #endif /* LIBC_SCCS and not lint */
69
70 #include <sys/types.h>
71 #include <sys/param.h>
72 #include <sys/socket.h>
73 #include <netinet/in.h>
74 #include <arpa/inet.h>
75 #include <arpa/nameser.h>
76
77 #include <stdio.h>
78 #include <string.h>
79 #include <netdb.h>
80 #include <resolv.h>
81 #include <ctype.h>
82 #include <errno.h>
83 #ifdef _ORG_FREEBSD_
84 #include <syslog.h>
85 #endif
86 #include "Socklib_internals.h"
87
88 typedef union {
89 int32_t al;
90 char ac;
91 } align;
92
93 void
_map_v4v6_address(const char * src,char * dst)94 _map_v4v6_address(const char *src, char *dst)
95 {
96 u_char *p = (u_char *)dst;
97 char tmp[INADDRSZ];
98 int i;
99
100 /* Stash a temporary copy so our caller can update in place. */
101 bcopy(src, tmp, INADDRSZ);
102 /* Mark this ipv6 addr as a mapped ipv4. */
103 for (i = 0; i < 10; i++)
104 *p++ = 0x00;
105 *p++ = 0xff;
106 *p++ = 0xff;
107 /* Retrieve the saved copy and we're done. */
108 bcopy(tmp, (void*)p, INADDRSZ);
109 }
110
111 void
_map_v4v6_hostent(struct hostent * hp,char ** bpp,int * lenp)112 _map_v4v6_hostent(struct hostent *hp, char **bpp, int *lenp)
113 {
114 char **ap;
115
116 if (hp->h_addrtype != AF_INET || hp->h_length != INADDRSZ)
117 return;
118 hp->h_addrtype = AF_INET6;
119 hp->h_length = IN6ADDRSZ;
120 for (ap = hp->h_addr_list; *ap; ap++) {
121 int i = (int)(sizeof(align) - ((size_t)*bpp % sizeof(align)));
122
123 if (*lenp < (i + IN6ADDRSZ)) {
124 /* Out of memory. Truncate address list here. XXX */
125 *ap = NULL;
126 return;
127 }
128 *bpp += i;
129 *lenp -= i;
130 _map_v4v6_address(*ap, *bpp);
131 *ap = *bpp;
132 *bpp += IN6ADDRSZ;
133 *lenp -= IN6ADDRSZ;
134 }
135 }
136