| Vishal Bhoj | 82c8071 | 2015-12-15 21:13:33 +0530 | [diff] [blame] | 1 | /*
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| 2 | * ++Copyright++ 1985, 1988, 1993
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| 3 | * -
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| 4 | * Copyright (c) 1985, 1988, 1993
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| 5 | * The Regents of the University of California. All rights reserved.
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| 6 | *
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| 7 | * Portions copyright (c) 1999, 2000
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| 8 | * Intel Corporation.
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| 9 | * All rights reserved.
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| 10 | *
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| 11 | * Redistribution and use in source and binary forms, with or without
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| 12 | * modification, are permitted provided that the following conditions
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| 13 | * are met:
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| 14 | *
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| 15 | * 1. Redistributions of source code must retain the above copyright
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| 16 | * notice, this list of conditions and the following disclaimer.
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| 17 | *
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| 18 | * 2. Redistributions in binary form must reproduce the above copyright
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| 19 | * notice, this list of conditions and the following disclaimer in the
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| 20 | * documentation and/or other materials provided with the distribution.
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| 21 | *
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| 22 | * 3. All advertising materials mentioning features or use of this software
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| 23 | * must display the following acknowledgement:
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| 24 | *
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| 25 | * This product includes software developed by the University of
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| 26 | * California, Berkeley, Intel Corporation, and its contributors.
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| 27 | *
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| 28 | * 4. Neither the name of University, Intel Corporation, or their respective
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| 29 | * contributors may be used to endorse or promote products derived from
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| 30 | * this software without specific prior written permission.
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| 31 | *
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| 32 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS, INTEL CORPORATION AND
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| 33 | * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
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| 34 | * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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| 35 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS,
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| 36 | * INTEL CORPORATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 37 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 38 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 39 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 40 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 41 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 42 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 43 | * -
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| 44 | * Portions Copyright (c) 1993 by Digital Equipment Corporation.
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| 45 | *
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| 46 | * Permission to use, copy, modify, and distribute this software for any
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| 47 | * purpose with or without fee is hereby granted, provided that the above
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| 48 | * copyright notice and this permission notice appear in all copies, and that
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| 49 | * the name of Digital Equipment Corporation not be used in advertising or
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| 50 | * publicity pertaining to distribution of the document or software without
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| 51 | * specific, written prior permission.
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| 52 | *
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| 53 | * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
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| 54 | * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
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| 55 | * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
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| 56 | * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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| 57 | * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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| 58 | * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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| 59 | * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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| 60 | * SOFTWARE.
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| 61 | * -
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| 62 | * --Copyright--
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| 63 | */
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| 64 |
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| 65 | #if defined(LIBC_SCCS) && !defined(lint)
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| 66 | static char sccsid[] = "@(#)gethostnamadr.c 8.1 (Berkeley) 6/4/93";
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| 67 | static char rcsid[] = "$Id: map_v4v6.c,v 1.1.1.1 2003/11/19 01:51:31 kyu3 Exp $";
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| 68 | #endif /* LIBC_SCCS and not lint */
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| 69 |
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| 70 | #include <sys/types.h>
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| 71 | #include <sys/param.h>
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| 72 | #include <sys/socket.h>
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| 73 | #include <netinet/in.h>
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| 74 | #include <arpa/inet.h>
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| 75 | #include <arpa/nameser.h>
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| 76 |
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| 77 | #include <stdio.h>
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| 78 | #include <string.h>
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| 79 | #include <netdb.h>
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| 80 | #include <resolv.h>
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| 81 | #include <ctype.h>
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| 82 | #include <errno.h>
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| 83 | #ifdef _ORG_FREEBSD_
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| 84 | #include <syslog.h>
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| 85 | #endif
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| 86 | #include "Socklib_internals.h"
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| 87 |
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| 88 | typedef union {
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| 89 | int32_t al;
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| 90 | char ac;
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| 91 | } align;
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| 92 |
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| 93 | void
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| 94 | _map_v4v6_address(const char *src, char *dst)
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| 95 | {
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| 96 | u_char *p = (u_char *)dst;
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| 97 | char tmp[INADDRSZ];
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| 98 | int i;
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| 99 |
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| 100 | /* Stash a temporary copy so our caller can update in place. */
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| 101 | bcopy(src, tmp, INADDRSZ);
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| 102 | /* Mark this ipv6 addr as a mapped ipv4. */
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| 103 | for (i = 0; i < 10; i++)
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| 104 | *p++ = 0x00;
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| 105 | *p++ = 0xff;
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| 106 | *p++ = 0xff;
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| 107 | /* Retrieve the saved copy and we're done. */
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| 108 | bcopy(tmp, (void*)p, INADDRSZ);
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| 109 | }
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| 110 |
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| 111 | void
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| 112 | _map_v4v6_hostent(struct hostent *hp, char **bpp, int *lenp)
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| 113 | {
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| 114 | char **ap;
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| 115 |
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| 116 | if (hp->h_addrtype != AF_INET || hp->h_length != INADDRSZ)
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| 117 | return;
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| 118 | hp->h_addrtype = AF_INET6;
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| 119 | hp->h_length = IN6ADDRSZ;
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| 120 | for (ap = hp->h_addr_list; *ap; ap++) {
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| 121 | int i = (int)(sizeof(align) - ((size_t)*bpp % sizeof(align)));
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| 122 |
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| 123 | if (*lenp < (i + IN6ADDRSZ)) {
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| 124 | /* Out of memory. Truncate address list here. XXX */
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| 125 | *ap = NULL;
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| 126 | return;
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| 127 | }
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| 128 | *bpp += i;
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| 129 | *lenp -= i;
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| 130 | _map_v4v6_address(*ap, *bpp);
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| 131 | *ap = *bpp;
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| 132 | *bpp += IN6ADDRSZ;
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| 133 | *lenp -= IN6ADDRSZ;
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| 134 | }
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| 135 | }
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