contrib/tcpdump/mpls.h

   1 /* @(#) $Header: /tcpdump/master/tcpdump/mpls.h,v 1.1 2004-06-14 14:47:58 hannes Exp $ (LBL)
   2  * Copyright (C) 2001 WIDE Project.  All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  * 3. Neither the name of the project nor the names of its contributors
  13  *    may be used to endorse or promote products derived from this software
  14  *    without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #define LABEL_MASK      0xfffff000
  30 #define LABEL_SHIFT     12
  31 #define EXP_MASK        0x00000e00
  32 #define EXP_SHIFT       9
  33 #define STACK_MASK      0x00000100
  34 #define STACK_SHIFT     8
  35 #define TTL_MASK        0x000000ff
  36 #define TTL_SHIFT       0
  37
  38 #define MPLS_LABEL(x)   (((x) & LABEL_MASK) >> LABEL_SHIFT)
  39 #define MPLS_EXP(x)     (((x) & EXP_MASK) >> EXP_SHIFT)
  40 #define MPLS_STACK(x)   (((x) & STACK_MASK) >> STACK_SHIFT)
  41 #define MPLS_TTL(x)     (((x) & TTL_MASK) >> TTL_SHIFT)