forked from osmocom/wireshark
176 lines
5.0 KiB
C
176 lines
5.0 KiB
C
/* packet-arcnet.c
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* Routines for arcnet dissection
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* Copyright 2001-2002, Peter Fales <ethereal@fales-lorenz.net>
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*
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* $Id: packet-arcnet.c,v 1.3 2002/10/18 21:40:12 guy 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 Gerald Combs
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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 <stdlib.h>
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#include <string.h>
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#include <glib.h>
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#include <epan/packet.h>
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#include "arcnet_pids.h"
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/* Initialize the protocol and registered fields */
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static int proto_arcnet = -1;
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static int hf_arcnet_src = -1;
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static int hf_arcnet_dst = -1;
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static int hf_arcnet_protID = -1;
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/* Initialize the subtree pointers */
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static gint ett_arcnet = -1;
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static dissector_table_t arcnet_dissector_table;
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static dissector_handle_t data_handle;
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/* Code to actually dissect the packets */
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static void
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dissect_arcnet (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
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{
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guint8 dst, src, protID;
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tvbuff_t *next_tvb;
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/* Set up structures needed to add the protocol subtree and manage it */
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proto_item *ti;
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proto_tree *arcnet_tree;
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/* Make entries in Protocol column and Info column on summary display */
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if (check_col (pinfo->cinfo, COL_PROTOCOL))
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col_set_str (pinfo->cinfo, COL_PROTOCOL, "ARCNET");
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if (check_col (pinfo->cinfo, COL_INFO))
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col_set_str (pinfo->cinfo, COL_INFO, "ARCNET");
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src = tvb_get_guint8 (tvb, 0);
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dst = tvb_get_guint8 (tvb, 1);
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SET_ADDRESS(&pinfo->dl_src, AT_ARCNET, 1, tvb_get_ptr(tvb, 0, 1));
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SET_ADDRESS(&pinfo->src, AT_ARCNET, 1, tvb_get_ptr(tvb, 0, 1));
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SET_ADDRESS(&pinfo->dl_dst, AT_ARCNET, 1, tvb_get_ptr(tvb, 1, 1));
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SET_ADDRESS(&pinfo->dst, AT_ARCNET, 1, tvb_get_ptr(tvb, 1, 1));
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protID = tvb_get_guint8 (tvb, 4);
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/* In the interest of speed, if "tree" is NULL, don't do any work not
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necessary to generate protocol tree items. */
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if (tree)
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{
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/* create display subtree for the protocol */
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ti =
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proto_tree_add_item (tree, proto_arcnet, tvb, 0, tvb_length (tvb),
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FALSE);
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arcnet_tree = proto_item_add_subtree (ti, ett_arcnet);
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proto_tree_add_uint (tree, hf_arcnet_src, tvb, 0, 1, src);
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proto_tree_add_uint (tree, hf_arcnet_dst, tvb, 1, 1, dst);
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proto_tree_add_uint (tree, hf_arcnet_protID, tvb, 4, 1, protID);
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}
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/* If this protocol has a sub-dissector call it here, see section 1.8 */
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next_tvb = tvb_new_subset (tvb, 8, -1, -1);
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if (!dissector_try_port (arcnet_dissector_table, protID,
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next_tvb, pinfo, tree))
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{
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if (check_col (pinfo->cinfo, COL_PROTOCOL))
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{
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col_add_fstr (pinfo->cinfo, COL_PROTOCOL, "0x%04x", protID);
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}
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call_dissector (data_handle, next_tvb, pinfo, tree);
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}
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}
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/* Register the protocol with Ethereal */
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/* this format is require because a script is used to build the C function
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that calls all the protocol registration.
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*/
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static const value_string arcnet_prot_id_vals[] = {
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{ARCNET_PROTO_IP, "IP packet"},
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{ARCNET_PROTO_ARP, "ARP packet"},
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{ARCNET_PROTO_IPX, "IPX packet"},
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{0, NULL}
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};
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void
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proto_register_arcnet (void)
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{
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/* Setup list of header fields See Section 1.6.1 for details*/
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static hf_register_info hf[] = {
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{&hf_arcnet_src,
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{"Source", "arcnet.src",
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FT_UINT8, BASE_HEX, NULL, 0,
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"Source ID", HFILL}
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},
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{&hf_arcnet_dst,
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{"Dest", "arcnet.dst",
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FT_UINT8, BASE_HEX, NULL, 0,
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"Dest ID", HFILL}
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},
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{&hf_arcnet_protID,
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{"Protocol ID", "arcnet.protID",
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FT_UINT8, BASE_HEX, VALS(arcnet_prot_id_vals), 0,
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"Proto type", HFILL}
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},
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};
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/* Setup protocol subtree array */
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static gint *ett[] = {
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&ett_arcnet,
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};
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arcnet_dissector_table = register_dissector_table ("arcnet.protocol_id",
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"ARCNET Protocol ID",
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FT_UINT8, BASE_HEX);
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/* Register the protocol name and description */
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proto_arcnet = proto_register_protocol ("ARCNET", "ARCNET", "arcnet");
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/* Required function calls to register the header fields and subtrees used */
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proto_register_field_array (proto_arcnet, hf, array_length (hf));
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proto_register_subtree_array (ett, array_length (ett));
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}
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void
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proto_reg_handoff_arcnet (void)
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{
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dissector_handle_t arcnet_handle;
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arcnet_handle = create_dissector_handle (dissect_arcnet, proto_arcnet);
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dissector_add ("wtap_encap", WTAP_ENCAP_ARCNET, arcnet_handle);
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data_handle = find_dissector ("data");
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}
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