pppd/eui64.h

   1 /*
   2     eui64.h - EUI64 routines for IPv6CP.
   3     Copyright (C) 1999  Tommi Komulainen <Tommi.Komulainen@iki.fi>
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18
  19
  20     $Id: eui64.h,v 1.2 1999/08/25 04:15:51 paulus Exp $
  21 */
  22
  23 /*
  24  * TODO:
  25  *
  26  * Maybe this should be done by processing struct in6_addr directly...
  27  */
  28 typedef union
  29 {
  30     u_int8_t e8[8];
  31     u_int16_t e16[4];
  32     u_int32_t e32[2];
  33 } eui64_t;
  34
  35 #define eui64_iszero(e)         (((e).e32[0] | (e).e32[1]) == 0)
  36 #define eui64_equals(e, o)      (((e).e32[0] == (o).e32[0]) && \
  37                                 ((e).e32[1] == (o).e32[1]))
  38 #define eui64_zero(e)           (e).e32[0] = (e).e32[1] = 0;
  39
  40 #define eui64_copy(s, d)        memcpy(&(d), &(s), sizeof(eui64_t))
  41
  42 #define eui64_magic(e)          do {                    \
  43                                 (e).e32[0] = magic();   \
  44                                 (e).e32[1] = magic();   \
  45                                 (e).e8[0] &= ~2;        \
  46                                 } while (0)
  47 #define eui64_magic_nz(x)       do {                            \
  48                                 eui64_magic(x);                 \
  49                                 } while (eui64_iszero(x))
  50 #define eui64_magic_ne(x, y)    do {                            \
  51                                 eui64_magic(x);                 \
  52                                 } while (eui64_equals(x, y))
  53
  54 #define eui64_get(ll, cp)       do {                            \
  55                                 eui64_copy((*cp), (ll));        \
  56                                 (cp) += sizeof(eui64_t);        \
  57                                 } while (0)
  58
  59 #define eui64_put(ll, cp)       do {                            \
  60                                 eui64_copy((ll), (*cp));        \
  61                                 (cp) += sizeof(eui64_t);        \
  62                                 } while (0)
  63
  64 #define eui64_set32(e, l)       do {                    \
  65                                 (e).e32[0] = 0;         \
  66                                 (e).e32[1] = htonl(l);  \
  67                                 } while (0)
  68 #define eui64_setlo32(e, l)     eui64_set32(e, l)
  69
  70 char *eui64_ntoa __P((eui64_t));        /* Returns ascii representation of id */