2 * Routines for lapbether frame disassembly
3 * Richard Sharpe <rsharpe@ns.aus.com> based on the lapb module by
4 * Olivier Abad <oabad@cybercable.fr>
6 * $Id: packet-lapbether.c,v 1.9 2002/01/21 07:36:36 guy Exp $
8 * Ethereal - Network traffic analyzer
9 * By Gerald Combs <gerald@ethereal.com>
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
31 #ifdef HAVE_SYS_TYPES_H
32 # include <sys/types.h>
38 #include <epan/packet.h>
41 static int proto_lapbether = -1;
43 static int hf_lapbether_length = -1;
45 static gint ett_lapbether = -1;
47 static dissector_handle_t lapb_handle;
50 dissect_lapbether(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
52 proto_tree *lapbether_tree, *ti;
56 if (check_col(pinfo->cinfo, COL_PROTOCOL))
57 col_set_str(pinfo->cinfo, COL_PROTOCOL, "LAPBETHER");
58 if (check_col(pinfo->cinfo, COL_INFO))
59 col_clear(pinfo->cinfo, COL_INFO);
61 len = tvb_get_guint8(tvb, 0) + tvb_get_guint8(tvb, 1) * 256;
65 ti = proto_tree_add_protocol_format(tree, proto_lapbether, tvb, 0, 2,
68 lapbether_tree = proto_item_add_subtree(ti, ett_lapbether);
69 proto_tree_add_uint_format(lapbether_tree, hf_lapbether_length, tvb, 0, 2,
70 len, "Length: %u", len);
74 next_tvb = tvb_new_subset(tvb, 2, len, len);
75 call_dissector(lapb_handle, next_tvb, pinfo, tree);
80 proto_register_lapbether(void)
82 static hf_register_info hf[] = {
83 { &hf_lapbether_length,
84 { "Length Field", "lapbether.length", FT_UINT16, BASE_DEC, NULL, 0x0,
85 "LAPBEther Length Field", HFILL }},
88 static gint *ett[] = {
92 proto_lapbether = proto_register_protocol ("Link Access Procedure Balanced Ethernet (LAPBETHER)",
93 "LAPBETHER", "lapbether");
94 proto_register_field_array (proto_lapbether, hf, array_length(hf));
95 proto_register_subtree_array(ett, array_length(ett));
98 /* The registration hand-off routine */
100 proto_reg_handoff_lapbether(void)
102 dissector_handle_t lapbether_handle;
105 * Get a handle for the LAPB dissector.
107 lapb_handle = find_dissector("lapb");
109 lapbether_handle = create_dissector_handle(dissect_lapbether,
111 dissector_add("ethertype", ETHERTYPE_DEC, lapbether_handle);