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   * Redistribution and use in source and binary forms, with or without
       8   * modification, are permitted provided that the following conditions
       9   * are met:
      10   * 1. Redistributions of source code must retain the above copyright
      11   *    notice, this list of conditions and the following disclaimer.
      12   * 2. Redistributions in binary form must reproduce the above copyright
      13   *    notice, this list of conditions and the following disclaimer in the
      14   *    documentation and/or other materials provided with the distribution.
      15   * 4. Neither the name of the University nor the names of its contributors
      16   *    may be used to endorse or promote products derived from this software
      17   *    without specific prior written permission.
      18   *
      19   * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
      20   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      21   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
      22   * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
      23   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
      24   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
      25   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
      26   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
      27   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
      28   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
      29   * SUCH DAMAGE.
      30   * -
      31   * Portions Copyright (c) 1993 by Digital Equipment Corporation.
      32   *
      33   * Permission to use, copy, modify, and distribute this software for any
      34   * purpose with or without fee is hereby granted, provided that the above
      35   * copyright notice and this permission notice appear in all copies, and that
      36   * the name of Digital Equipment Corporation not be used in advertising or
      37   * publicity pertaining to distribution of the document or software without
      38   * specific, written prior permission.
      39   *
      40   * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
      41   * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
      42   * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
      43   * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
      44   * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
      45   * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
      46   * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
      47   * SOFTWARE.
      48   * -
      49   * --Copyright--
      50   */
      51  
      52  #include <string.h>
      53  #include <arpa/nameser.h>
      54  
      55  static void
      56  map_v4v6_address (const char *src, char *dst)
      57  {
      58    u_char *p = (u_char *) dst;
      59    int i;
      60  
      61    /* Move the IPv4 part to the right position.  */
      62    memcpy (dst + 12, src, INADDRSZ);
      63  
      64    /* Mark this ipv6 addr as a mapped ipv4. */
      65    for (i = 0; i < 10; i++)
      66      *p++ = 0x00;
      67    *p++ = 0xff;
      68    *p = 0xff;
      69  }