1/*	$NetBSD: mpls.h,v 1.2 2016/10/08 20:19:37 joerg Exp $ */
2
3/*-
4 * Copyright (c) 2010 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Mihai Chelaru <kefren@NetBSD.org>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#ifndef _NETMPLS_MPLS_H_
33#define _NETMPLS_MPLS_H_
34
35#include <sys/param.h>
36#include <sys/time.h>
37#include <sys/proc.h>
38#include <sys/queue.h>
39
40#include <net/if.h>
41#include <net/if_dl.h>
42
43#define MPLS_LABEL_IPV4NULL	0	/* IPv4 Explicit NULL Label	*/
44#define MPLS_LABEL_RTALERT	1	/* Router Alert Label		*/
45#define MPLS_LABEL_IPV6NULL	2	/* IPv6 Explicit NULL Label	*/
46#define MPLS_LABEL_IMPLNULL	3	/* Implicit NULL Label		*/
47#define MPLS_LABEL_RESMAX	15	/* Maximum reserved Label	*/
48
49union mpls_shim {
50	uint32_t s_addr;		/* the whole shim */
51	struct {
52#if BYTE_ORDER == LITTLE_ENDIAN
53		uint32_t ttl:8;
54		uint32_t bos:1;
55		uint32_t exp:3;
56		uint32_t label:20;
57#else
58		uint32_t label:20;
59		uint32_t exp:3;
60		uint32_t bos:1;
61		uint32_t ttl:8;
62#endif
63	} shim;
64};
65
66struct sockaddr_mpls {
67	uint8_t smpls_len;
68	uint8_t smpls_family;
69	uint8_t smpls_pad[2];
70	union mpls_shim smpls_addr;
71};
72__CTASSERT(sizeof(struct sockaddr_mpls) == 8);
73
74#endif /* !_NETMPLS_MPLS_H_ */
75