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 1.3 1999/09/30 19:56:37 masputra Exp $
  21 */
  22
  23 #ifndef __EUI64_H__
  24 #define __EUI64_H__
  25
  26 #if !defined(INET6)
  27 #error  "this file should only be included when INET6 is defined"
  28 #endif /* not defined(INET6) */
  29
  30 #if defined(SOL2)
  31 #include <netinet/in.h>
  32
  33 typedef union {
  34     uint8_t     e8[8];          /* lower 64-bit IPv6 address */
  35     uint32_t    e32[2];         /* lower 64-bit IPv6 address */
  36 } eui64_t;
  37
  38 /*
  39  * Declare the two below, since in.h only defines them when _KERNEL
  40  * is declared - which shouldn't be true when dealing with user-land programs
  41  */
  42 #define s6_addr8        _S6_un._S6_u8
  43 #define s6_addr32       _S6_un._S6_u32
  44
  45 #else /* else if not defined(SOL2) */
  46
  47 /*
  48  * TODO:
  49  *
  50  * Maybe this should be done by processing struct in6_addr directly...
  51  */
  52 typedef union
  53 {
  54     u_int8_t e8[8];
  55     u_int16_t e16[4];
  56     u_int32_t e32[2];
  57 } eui64_t;
  58
  59 #endif /* defined(SOL2) */
  60
  61 #define eui64_iszero(e)         (((e).e32[0] | (e).e32[1]) == 0)
  62 #define eui64_equals(e, o)      (((e).e32[0] == (o).e32[0]) && \
  63                                 ((e).e32[1] == (o).e32[1]))
  64 #define eui64_zero(e)           (e).e32[0] = (e).e32[1] = 0;
  65
  66 #define eui64_copy(s, d)        memcpy(&(d), &(s), sizeof(eui64_t))
  67
  68 #define eui64_magic(e)          do {                    \
  69                                 (e).e32[0] = magic();   \
  70                                 (e).e32[1] = magic();   \
  71                                 (e).e8[0] &= ~2;        \
  72                                 } while (0)
  73 #define eui64_magic_nz(x)       do {                            \
  74                                 eui64_magic(x);                 \
  75                                 } while (eui64_iszero(x))
  76 #define eui64_magic_ne(x, y)    do {                            \
  77                                 eui64_magic(x);                 \
  78                                 } while (eui64_equals(x, y))
  79
  80 #define eui64_get(ll, cp)       do {                            \
  81                                 eui64_copy((*cp), (ll));        \
  82                                 (cp) += sizeof(eui64_t);        \
  83                                 } while (0)
  84
  85 #define eui64_put(ll, cp)       do {                            \
  86                                 eui64_copy((ll), (*cp));        \
  87                                 (cp) += sizeof(eui64_t);        \
  88                                 } while (0)
  89
  90 #define eui64_set32(e, l)       do {                    \
  91                                 (e).e32[0] = 0;         \
  92                                 (e).e32[1] = htonl(l);  \
  93                                 } while (0)
  94 #define eui64_setlo32(e, l)     eui64_set32(e, l)
  95
  96 char *eui64_ntoa __P((eui64_t));        /* Returns ascii representation of id */
  97
  98 #endif /* __EUI64_H__ */
  99