Blame resolv/mapv4v6hostent.h

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/*
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 * ++Copyright++ 1985, 1988, 1993
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 * -
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 * Copyright (c) 1985, 1988, 1993
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 *    The Regents of the University of California.  All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 4. Neither the name of the University nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 * -
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 * Portions Copyright (c) 1993 by Digital Equipment Corporation.
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 *
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 * Permission to use, copy, modify, and distribute this software for any
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 * purpose with or without fee is hereby granted, provided that the above
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 * copyright notice and this permission notice appear in all copies, and that
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 * the name of Digital Equipment Corporation not be used in advertising or
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 * publicity pertaining to distribution of the document or software without
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 * specific, written prior permission.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
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 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
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 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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 * SOFTWARE.
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 * -
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 * --Copyright--
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 */
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#include <arpa/nameser.h>
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#include <sys/socket.h>
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typedef union {
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    int32_t al;
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    char ac;
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} align;
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static int
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map_v4v6_hostent (struct hostent *hp, char **bpp, int *lenp)
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{
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  char **ap;
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  if (hp->h_addrtype != AF_INET || hp->h_length != INADDRSZ)
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    return 0;
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  hp->h_addrtype = AF_INET6;
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  hp->h_length = IN6ADDRSZ;
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  for (ap = hp->h_addr_list; *ap; ap++)
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    {
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      int i = sizeof (align) - ((u_long) *bpp % sizeof (align));
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      if (*lenp < (i + IN6ADDRSZ))
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	/* Out of memory.  */
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	return 1;
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      *bpp += i;
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      *lenp -= i;
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      map_v4v6_address (*ap, *bpp);
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      *ap = *bpp;
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      *bpp += IN6ADDRSZ;
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      *lenp -= IN6ADDRSZ;
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    }
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  return 0;
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}