text: /*
   * eui64.h - EUI64 routines for IPv6CP.
   *
   * Copyright (c) 1999 Tommi Komulainen.  All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The name(s) of the authors of this software must not be used to
   *    endorse or promote products derived from this software without
   *    prior written permission.
   *
   * 4. Redistributions of any form whatsoever must retain the following
   *    acknowledgment:
   *    "This product includes software developed by Tommi Komulainen
   *     <Tommi.Komulainen@iki.fi>".
   *
   * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
   * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
   * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
   * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
   * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
   * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   *
   * $Id: eui64.h,v 1.6 2002/12/04 23:03:32 paulus Exp $
  */
  
  #include "ppp_opts.h"
  #if PPP_SUPPORT && PPP_IPV6_SUPPORT  /* don't build if not configured for use in ppp_opts.h */
  
  #ifndef EUI64_H
  #define EUI64_H
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  /*
   * @todo:
   *
   * Maybe this should be done by processing struct in6_addr directly...
   */
  typedef union
  {
      u8_t e8[8];
      u16_t e16[4];
      u32_t e32[2];
  } eui64_t;
  
  #define eui64_iszero(e)		(((e).e32[0] | (e).e32[1]) == 0)
  #define eui64_equals(e, o)	(((e).e32[0] == (o).e32[0]) && \
  				((e).e32[1] == (o).e32[1]))
  #define eui64_zero(e)		(e).e32[0] = (e).e32[1] = 0;
  
  #define eui64_copy(s, d)	memcpy(&(d), &(s), sizeof(eui64_t))
  
  #define eui64_magic(e)		do {			\
  				(e).e32[0] = magic();	\
  				(e).e32[1] = magic();	\
  				(e).e8[0] &= ~2;	\
  				} while (0)
  #define eui64_magic_nz(x)	do {				\
  				eui64_magic(x);			\
  				} while (eui64_iszero(x))
  #define eui64_magic_ne(x, y)	do {				\
  				eui64_magic(x);			\
  				} while (eui64_equals(x, y))
  
  #define eui64_get(ll, cp)	do {				\
  				eui64_copy((*cp), (ll));	\
  				(cp) += sizeof(eui64_t);	\
  				} while (0)
  
  #define eui64_put(ll, cp)	do {				\
  				eui64_copy((ll), (*cp));	\
  				(cp) += sizeof(eui64_t);	\
  				} while (0)
  
  #define eui64_set32(e, l)	do {			\
  				(e).e32[0] = 0;		\
  				(e).e32[1] = ppp_htonl(l);	\
  				} while (0)
  #define eui64_setlo32(e, l)	eui64_set32(e, l)
  
  char *eui64_ntoa(eui64_t);	/* Returns ascii representation of id */
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* EUI64_H */
  #endif /* PPP_SUPPORT && PPP_IPV6_SUPPORT */
  