mpls.h revision 146773 
178559Sobrien/* @(#) $Header: /tcpdump/master/tcpdump/mpls.h,v 1.1 2004/06/14 14:47:58 hannes Exp $ (LBL)
278559Sobrien * Copyright (C) 2001 WIDE Project.  All rights reserved.
378559Sobrien *
478559Sobrien * Redistribution and use in source and binary forms, with or without
578559Sobrien * modification, are permitted provided that the following conditions
678559Sobrien * are met:
7195767Skensmith * 1. Redistributions of source code must retain the above copyright
878559Sobrien *    notice, this list of conditions and the following disclaimer.
978559Sobrien * 2. Redistributions in binary form must reproduce the above copyright
1078559Sobrien *    notice, this list of conditions and the following disclaimer in the
1178559Sobrien *    documentation and/or other materials provided with the distribution.
1278559Sobrien * 3. Neither the name of the project nor the names of its contributors
1378559Sobrien *    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)
42