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 1.5 2001/01/25 06:14:14 guy Exp $
8 * Ethereal - Network traffic analyzer
9 * By Gerald Combs <gerald@zing.org>
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License
15 * as published by the Free Software Foundation; either version 2
16 * of the License, or (at your option) any later version.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
32 #ifdef HAVE_SYS_TYPES_H
33 # include <sys/types.h>
42 static int proto_lapbether = -1;
44 static int hf_lapbether_length = -1;
46 static gint ett_lapbether = -1;
48 static dissector_handle_t lapb_handle;
51 dissect_lapbether(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
53 proto_tree *lapbether_tree, *ti;
57 if (check_col(pinfo->fd, COL_PROTOCOL))
58 col_set_str(pinfo->fd, COL_PROTOCOL, "LAPBETHER");
59 if (check_col(pinfo->fd, COL_INFO))
60 col_clear(pinfo->fd, COL_INFO);
62 len = tvb_get_guint8(tvb, 0) + tvb_get_guint8(tvb, 1) * 256;
66 ti = proto_tree_add_protocol_format(tree, proto_lapbether, tvb, 0, 2,
69 lapbether_tree = proto_item_add_subtree(ti, ett_lapbether);
70 proto_tree_add_uint_format(lapbether_tree, hf_lapbether_length, tvb, 0, 2,
71 len, "Length: %u", len);
75 next_tvb = tvb_new_subset(tvb, 2, len, len);
76 call_dissector(lapb_handle, next_tvb, pinfo, tree);
81 proto_register_lapbether(void)
83 static hf_register_info hf[] = {
84 { &hf_lapbether_length,
85 { "Length Field", "lapbether.length", FT_UINT16, BASE_DEC, NULL, 0x0,
86 "LAPBEther Length Field"}},
89 static gint *ett[] = {
93 proto_lapbether = proto_register_protocol ("Link Access Procedure Balanced Ethernet (LAPBETHER)",
94 "LAPBETHER", "lapbether");
95 proto_register_field_array (proto_lapbether, hf, array_length(hf));
96 proto_register_subtree_array(ett, array_length(ett));
99 /* The registration hand-off routine */
101 proto_reg_handoff_lapbether(void)
105 * Get a handle for the LAPB dissector.
107 lapb_handle = find_dissector("lapb");
109 dissector_add("ethertype", ETHERTYPE_DEC, dissect_lapbether, proto_lapbether);