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/* packet-mpls.h
* Declarations of exported routines from MPLS dissector
* Author: Carlos Pignataro <cpignata@cisco.com>
* Copyright 2005, cisco Systems, Inc.
*
* (c) Copyright 2006, _FF_ Francesco Fondelli <francesco.fondelli@gmail.com>
* added MPLS OAM support, ITU-T Y.1711
* (c) Copyright 2011, Shobhank Sharma <ssharma5@ncsu.edu>
* added MPLS Generic Associated Channel as per RFC 5586
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef PACKET_MPLS_H
#define PACKET_MPLS_H
/* Special labels in MPLS */
enum {
MPLS_LABEL_IP4_EXPLICIT_NULL = 0,
MPLS_LABEL_ROUTER_ALERT,
MPLS_LABEL_IP6_EXPLICIT_NULL,
MPLS_LABEL_IMPLICIT_NULL,
MPLS_LABEL_GACH = 13, /* aka GAL */
MPLS_LABEL_OAM_ALERT = 14,
MPLS_LABEL_MAX_RESERVED = 15,
MPLS_LABEL_INVALID = -1
};
/*
* FF: private data passed from the MPLS dissector to subdissectors
* (data parameter).
*/
struct mplsinfo {
guint32 label; /* last mpls label in label stack */
guint8 exp; /* former EXP bits of last mpls shim in stack */
guint8 bos; /* BOS bit of last mpls shim in stack */
guint8 ttl; /* TTL bits of last mpls shim in stack */
};
extern const value_string special_labels[];
extern void decode_mpls_label(tvbuff_t *tvb, int offset,
guint32 *label, guint8 *exp,
guint8 *bos, guint8 *ttl);
extern gboolean dissect_try_cw_first_nibble(tvbuff_t *tvb, packet_info *pinfo,
proto_tree *tree );
int dissect_mpls_echo(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_);
#endif
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