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 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 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
