forked from osmocom/wireshark
110 lines
3.0 KiB
C
110 lines
3.0 KiB
C
/* packet-lapbether.c
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* Routines for lapbether frame disassembly
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* Richard Sharpe <rsharpe@ns.aus.com> based on the lapb module by
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* Olivier Abad <oabad@noos.fr>
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*
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* $Id: packet-lapbether.c,v 1.12 2002/09/01 14:30:30 oabad Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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* Copyright 1998
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdio.h>
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#include <glib.h>
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#include <string.h>
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#include <epan/packet.h>
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#include "etypes.h"
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static int proto_lapbether = -1;
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static int hf_lapbether_length = -1;
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static gint ett_lapbether = -1;
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static dissector_handle_t lapb_handle;
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static void
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dissect_lapbether(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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proto_tree *lapbether_tree, *ti;
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int len;
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tvbuff_t *next_tvb;
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if (check_col(pinfo->cinfo, COL_PROTOCOL))
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "LAPBETHER");
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if (check_col(pinfo->cinfo, COL_INFO))
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col_clear(pinfo->cinfo, COL_INFO);
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len = tvb_get_guint8(tvb, 0) + tvb_get_guint8(tvb, 1) * 256;
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if (tree) {
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ti = proto_tree_add_protocol_format(tree, proto_lapbether, tvb, 0, 2,
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"LAPBETHER");
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lapbether_tree = proto_item_add_subtree(ti, ett_lapbether);
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proto_tree_add_uint_format(lapbether_tree, hf_lapbether_length, tvb, 0, 2,
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len, "Length: %u", len);
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}
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next_tvb = tvb_new_subset(tvb, 2, len, len);
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call_dissector(lapb_handle, next_tvb, pinfo, tree);
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}
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void
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proto_register_lapbether(void)
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{
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static hf_register_info hf[] = {
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{ &hf_lapbether_length,
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{ "Length Field", "lapbether.length", FT_UINT16, BASE_DEC, NULL, 0x0,
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"LAPBEther Length Field", HFILL }},
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};
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static gint *ett[] = {
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&ett_lapbether,
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};
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proto_lapbether = proto_register_protocol ("Link Access Procedure Balanced Ethernet (LAPBETHER)",
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"LAPBETHER", "lapbether");
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proto_register_field_array (proto_lapbether, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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/* The registration hand-off routine */
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void
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proto_reg_handoff_lapbether(void)
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{
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dissector_handle_t lapbether_handle;
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/*
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* Get a handle for the LAPB dissector.
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*/
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lapb_handle = find_dissector("lapb");
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lapbether_handle = create_dissector_handle(dissect_lapbether,
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proto_lapbether);
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dissector_add("ethertype", ETHERTYPE_DEC, lapbether_handle);
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}
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