minix/lib/liblwip/dist/src/include/netif/ppp/eui64.h

   1 /*
   2  * eui64.h - EUI64 routines for IPv6CP.
   3  *
   4  * Copyright (c) 1999 Tommi Komulainen.  All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the
  16  *    distribution.
  17  *
  18  * 3. The name(s) of the authors of this software must not be used to
  19  *    endorse or promote products derived from this software without
  20  *    prior written permission.
  21  *
  22  * 4. Redistributions of any form whatsoever must retain the following
  23  *    acknowledgment:
  24  *    "This product includes software developed by Tommi Komulainen
  25  *     <Tommi.Komulainen@iki.fi>".
  26  *
  27  * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
  28  * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  29  * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
  30  * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  31  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
  32  * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
  33  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  34  *
  35  * $Id: eui64.h,v 1.6 2002/12/04 23:03:32 paulus Exp $
  36 */
  37
  38 #include "netif/ppp/ppp_opts.h"
  39 #if PPP_SUPPORT && PPP_IPV6_SUPPORT  /* don't build if not configured for use in lwipopts.h */
  40
  41 #ifndef EUI64_H
  42 #define EUI64_H
  43
  44 /*
  45  * @todo:
  46  *
  47  * Maybe this should be done by processing struct in6_addr directly...
  48  */
  49 typedef union
  50 {
  51     u8_t e8[8];
  52     u16_t e16[4];
  53     u32_t e32[2];
  54 } eui64_t;
  55
  56 #define eui64_iszero(e)         (((e).e32[0] | (e).e32[1]) == 0)
  57 #define eui64_equals(e, o)      (((e).e32[0] == (o).e32[0]) && \
  58                                 ((e).e32[1] == (o).e32[1]))
  59 #define eui64_zero(e)           (e).e32[0] = (e).e32[1] = 0;
  60
  61 #define eui64_copy(s, d)        memcpy(&(d), &(s), sizeof(eui64_t))
  62
  63 #define eui64_magic(e)          do {                    \
  64                                 (e).e32[0] = magic();   \
  65                                 (e).e32[1] = magic();   \
  66                                 (e).e8[0] &= ~2;        \
  67                                 } while (0)
  68 #define eui64_magic_nz(x)       do {                            \
  69                                 eui64_magic(x);                 \
  70                                 } while (eui64_iszero(x))
  71 #define eui64_magic_ne(x, y)    do {                            \
  72                                 eui64_magic(x);                 \
  73                                 } while (eui64_equals(x, y))
  74
  75 #define eui64_get(ll, cp)       do {                            \
  76                                 eui64_copy((*cp), (ll));        \
  77                                 (cp) += sizeof(eui64_t);        \
  78                                 } while (0)
  79
  80 #define eui64_put(ll, cp)       do {                            \
  81                                 eui64_copy((ll), (*cp));        \
  82                                 (cp) += sizeof(eui64_t);        \
  83                                 } while (0)
  84
  85 #define eui64_set32(e, l)       do {                    \
  86                                 (e).e32[0] = 0;         \
  87                                 (e).e32[1] = lwip_htonl(l);     \
  88                                 } while (0)
  89 #define eui64_setlo32(e, l)     eui64_set32(e, l)
  90
  91 char *eui64_ntoa(eui64_t);      /* Returns ascii representation of id */
  92
  93 #endif /* EUI64_H */
  94 #endif /* PPP_SUPPORT && PPP_IPV6_SUPPORT */