2002-10-18 21:00:01 +00:00
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/* 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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2004-07-18 00:24:25 +00:00
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* $Id$
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2002-10-18 21:00:01 +00:00
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*
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2006-05-21 04:49:01 +00:00
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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2002-10-18 21:00:01 +00:00
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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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2010-05-10 15:54:57 +00:00
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*
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2002-10-18 21:00:01 +00:00
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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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2010-05-10 15:54:57 +00:00
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*
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2002-10-18 21:00:01 +00:00
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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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2012-06-28 23:18:38 +00:00
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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2002-10-18 21:00:01 +00:00
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*/
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2012-09-20 02:03:38 +00:00
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#include "config.h"
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2002-10-18 21:00:01 +00:00
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#include <glib.h>
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#include <epan/packet.h>
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2003-01-23 06:57:37 +00:00
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#include "packet-arcnet.h"
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2005-09-17 00:02:31 +00:00
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#include <epan/arcnet_pids.h>
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2003-01-23 06:57:37 +00:00
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#include "packet-ip.h"
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2002-10-18 21:00:01 +00:00
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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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2003-01-23 04:04:01 +00:00
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static int hf_arcnet_offset = -1;
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2002-10-18 21:00:01 +00:00
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static int hf_arcnet_protID = -1;
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2003-01-23 07:55:28 +00:00
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static int hf_arcnet_exception_flag = -1;
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2003-01-23 04:04:01 +00:00
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static int hf_arcnet_split_flag = -1;
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static int hf_arcnet_sequence = -1;
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2002-10-18 21:00:01 +00:00
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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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2003-01-23 06:57:37 +00:00
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void
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capture_arcnet (const guchar *pd, int len, packet_counts *ld,
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2012-04-23 17:50:02 +00:00
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gboolean has_offset, gboolean has_exception)
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2003-01-23 06:57:37 +00:00
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{
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2003-12-19 01:24:09 +00:00
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int offset = has_offset ? 4 : 2;
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2003-01-23 06:57:37 +00:00
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if (!BYTES_ARE_IN_FRAME(offset, len, 1)) {
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ld->other++;
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return;
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}
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switch (pd[offset]) {
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case ARCNET_PROTO_IP_1051:
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/* No fragmentation stuff in the header */
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capture_ip(pd, offset + 1, len, ld);
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break;
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case ARCNET_PROTO_IP_1201:
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2003-01-23 09:04:54 +00:00
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/*
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* There's fragmentation stuff in the header.
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*
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* XXX - on at least some versions of NetBSD, it appears that we
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* might we get ARCNET frames, not reassembled packets; we should
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* perhaps bump "ld->other" for all but the first frame of a packet.
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*
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* XXX - but on FreeBSD it appears that we get reassembled packets
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* on input (but apparently we get frames on output - or maybe
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* we get the packet *and* all its frames!); how to tell the
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* difference? It looks from the FreeBSD reassembly code as if
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* the reassembled packet arrives with the header for the first
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* frame. It also looks as if, on output, we first get the
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* full packet, with a header containing none of the fragmentation
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* stuff, and then get the frames.
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*
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* On Linux, we get only reassembled packets, and the exception
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* frame stuff is hidden - there's a split flag and sequence
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* number, but it appears that it will never have the exception
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* frame stuff.
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*
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* XXX - what about OpenBSD? And, for that matter, what about
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* Windows? (I suspect Windows supplies reassembled frames,
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* as WinPcap, like PF_PACKET sockets, taps into the networking
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* stack just as other protocols do.)
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*/
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2003-01-23 07:55:28 +00:00
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offset++;
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if (!BYTES_ARE_IN_FRAME(offset, len, 1)) {
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ld->other++;
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return;
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}
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2003-01-23 09:04:54 +00:00
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if (has_exception && pd[offset] == 0xff) {
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2003-01-23 07:55:28 +00:00
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/* This is an exception packet. The flag value there is the
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"this is an exception flag" packet; the next two bytes
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after it are padding, and another copy of the packet
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type appears after the padding. */
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offset += 4;
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}
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capture_ip(pd, offset + 3, len, ld);
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2003-01-23 06:57:37 +00:00
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break;
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case ARCNET_PROTO_ARP_1051:
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case ARCNET_PROTO_ARP_1201:
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2003-01-23 09:04:54 +00:00
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/*
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* XXX - do we have to worry about fragmentation for ARP?
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*/
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2003-01-23 06:57:37 +00:00
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ld->arp++;
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break;
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2003-12-19 19:09:49 +00:00
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case ARCNET_PROTO_IPX:
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ld->ipx++;
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break;
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2003-01-23 06:57:37 +00:00
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default:
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ld->other++;
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break;
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}
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}
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2002-10-18 21:00:01 +00:00
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static void
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2003-01-23 04:04:01 +00:00
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dissect_arcnet_common (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree,
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2012-04-23 17:50:02 +00:00
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gboolean has_offset, gboolean has_exception)
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2002-10-18 21:00:01 +00:00
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{
|
2003-01-23 04:04:01 +00:00
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int offset = 0;
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2003-01-23 07:55:28 +00:00
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guint8 dst, src, protID, split_flag;
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2002-10-18 21:00:01 +00:00
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tvbuff_t *next_tvb;
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2003-01-23 04:04:01 +00:00
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proto_item *ti = NULL;
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proto_tree *arcnet_tree = NULL;
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2002-10-18 21:00:01 +00:00
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2009-08-09 06:26:46 +00:00
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col_set_str (pinfo->cinfo, COL_PROTOCOL, "ARCNET");
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2002-10-18 21:00:01 +00:00
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2009-08-09 07:01:26 +00:00
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col_set_str(pinfo->cinfo, COL_INFO, "ARCNET");
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2002-10-18 21:00:01 +00:00
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src = tvb_get_guint8 (tvb, 0);
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dst = tvb_get_guint8 (tvb, 1);
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2012-04-23 17:50:02 +00:00
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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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2002-10-18 21:40:13 +00:00
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2011-10-21 02:10:19 +00:00
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ti = proto_tree_add_item (tree, proto_arcnet, tvb, 0, -1, ENC_NA);
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2002-10-18 21:00:01 +00:00
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2009-11-09 14:20:44 +00:00
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arcnet_tree = proto_item_add_subtree (ti, ett_arcnet);
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2002-10-18 21:00:01 +00:00
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2009-11-09 14:20:44 +00:00
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proto_tree_add_uint (arcnet_tree, hf_arcnet_src, tvb, offset, 1, src);
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2003-01-23 04:04:01 +00:00
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offset++;
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2009-11-09 14:20:44 +00:00
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proto_tree_add_uint (arcnet_tree, hf_arcnet_dst, tvb, offset, 1, dst);
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2003-01-23 04:04:01 +00:00
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offset++;
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if (has_offset) {
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2011-10-04 22:44:31 +00:00
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proto_tree_add_item (arcnet_tree, hf_arcnet_offset, tvb, offset, 2, ENC_NA);
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2003-01-23 04:04:01 +00:00
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offset += 2;
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}
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2002-10-18 21:00:01 +00:00
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2003-01-23 06:57:37 +00:00
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protID = tvb_get_guint8 (tvb, offset);
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2009-11-09 14:20:44 +00:00
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proto_tree_add_uint (arcnet_tree, hf_arcnet_protID, tvb, offset, 1, protID);
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2003-01-23 04:04:01 +00:00
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offset++;
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switch (protID) {
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case ARCNET_PROTO_IP_1051:
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case ARCNET_PROTO_ARP_1051:
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case ARCNET_PROTO_DIAGNOSE:
|
2012-04-23 17:50:02 +00:00
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case ARCNET_PROTO_BACNET: /* XXX - no fragmentation? */
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2003-01-23 04:04:01 +00:00
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/* No fragmentation stuff in the header */
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break;
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default:
|
2003-01-23 09:04:54 +00:00
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/*
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* Show the fragmentation stuff - flag and sequence ID.
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*
|
|
|
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* XXX - on at least some versions of NetBSD, it appears that
|
|
|
|
* we might get ARCNET frames, not reassembled packets; if so,
|
|
|
|
* we should reassemble them.
|
|
|
|
*
|
|
|
|
* XXX - but on FreeBSD it appears that we get reassembled packets
|
|
|
|
* on input (but apparently we get frames on output - or maybe
|
|
|
|
* we get the packet *and* all its frames!); how to tell the
|
|
|
|
* difference? It looks from the FreeBSD reassembly code as if
|
|
|
|
* the reassembled packet arrives with the header for the first
|
|
|
|
* frame. It also looks as if, on output, we first get the
|
|
|
|
* full packet, with a header containing none of the fragmentation
|
|
|
|
* stuff, and then get the frames.
|
|
|
|
*
|
|
|
|
* On Linux, we get only reassembled packets, and the exception
|
|
|
|
* frame stuff is hidden - there's a split flag and sequence
|
|
|
|
* number, but it appears that it will never have the exception
|
|
|
|
* frame stuff.
|
|
|
|
*
|
|
|
|
* XXX - what about OpenBSD? And, for that matter, what about
|
|
|
|
* Windows? (I suspect Windows supplies reassembled frames,
|
|
|
|
* as WinPcap, like PF_PACKET sockets, taps into the networking
|
|
|
|
* stack just as other protocols do.)
|
|
|
|
*/
|
2003-01-23 07:55:28 +00:00
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split_flag = tvb_get_guint8 (tvb, offset);
|
2003-01-23 09:04:54 +00:00
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if (has_exception && split_flag == 0xff) {
|
2003-01-23 07:55:28 +00:00
|
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/* This is an exception packet. The flag value there is the
|
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|
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"this is an exception flag" packet; the next two bytes
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|
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after it are padding. */
|
2012-04-23 17:50:02 +00:00
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proto_tree_add_uint (arcnet_tree, hf_arcnet_exception_flag, tvb, offset, 1,
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split_flag);
|
2010-05-10 15:54:57 +00:00
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offset++;
|
2003-01-23 07:55:28 +00:00
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2009-11-09 14:20:44 +00:00
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proto_tree_add_text (arcnet_tree, tvb, offset, 2, "Padding");
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2003-01-23 07:55:28 +00:00
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offset += 2;
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/* Another copy of the packet type appears after the padding. */
|
2011-09-26 05:52:58 +00:00
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proto_tree_add_item (arcnet_tree, hf_arcnet_protID, tvb, offset, 1, ENC_BIG_ENDIAN);
|
2003-01-23 07:55:28 +00:00
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offset++;
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/* And after that comes the real split flag. */
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split_flag = tvb_get_guint8 (tvb, offset);
|
2010-05-10 15:54:57 +00:00
|
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}
|
2009-11-09 14:20:44 +00:00
|
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proto_tree_add_uint (arcnet_tree, hf_arcnet_split_flag, tvb, offset, 1,
|
2012-04-23 17:50:02 +00:00
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|
split_flag);
|
2003-01-23 07:55:28 +00:00
|
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|
offset++;
|
2010-05-10 15:54:57 +00:00
|
|
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|
2011-09-26 05:52:58 +00:00
|
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proto_tree_add_item (arcnet_tree, hf_arcnet_sequence, tvb, offset, 2, ENC_BIG_ENDIAN);
|
2003-01-23 07:55:28 +00:00
|
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offset += 2;
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|
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|
2003-01-23 04:04:01 +00:00
|
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break;
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|
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}
|
2002-10-18 21:00:01 +00:00
|
|
|
|
2003-01-23 04:04:01 +00:00
|
|
|
/* Set the length of the ARCNET header protocol tree item. */
|
2009-11-09 14:20:44 +00:00
|
|
|
proto_item_set_len(ti, offset);
|
2010-05-10 15:54:57 +00:00
|
|
|
|
2009-08-16 12:36:22 +00:00
|
|
|
next_tvb = tvb_new_subset_remaining (tvb, offset);
|
2002-10-18 21:00:01 +00:00
|
|
|
|
2010-12-20 05:35:29 +00:00
|
|
|
if (!dissector_try_uint (arcnet_dissector_table, protID,
|
2012-04-23 17:50:02 +00:00
|
|
|
next_tvb, pinfo, tree))
|
2002-10-18 21:00:01 +00:00
|
|
|
{
|
2012-04-23 17:50:02 +00:00
|
|
|
col_add_fstr (pinfo->cinfo, COL_PROTOCOL, "0x%04x", protID);
|
2002-10-18 21:00:01 +00:00
|
|
|
call_dissector (data_handle, next_tvb, pinfo, tree);
|
|
|
|
}
|
|
|
|
|
|
|
|
}
|
|
|
|
|
2003-01-23 04:04:01 +00:00
|
|
|
/*
|
|
|
|
* BSD-style ARCNET headers - they don't have the offset field from the
|
2003-01-23 09:04:54 +00:00
|
|
|
* ARCNET hardware packet, but we might get an exception frame header.
|
2003-01-23 04:04:01 +00:00
|
|
|
*/
|
|
|
|
static void
|
|
|
|
dissect_arcnet (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
|
|
|
|
{
|
2010-05-10 15:54:57 +00:00
|
|
|
dissect_arcnet_common (tvb, pinfo, tree, FALSE, TRUE);
|
2003-01-23 04:04:01 +00:00
|
|
|
}
|
2002-10-18 21:00:01 +00:00
|
|
|
|
2003-01-23 04:04:01 +00:00
|
|
|
/*
|
|
|
|
* Linux-style ARCNET headers - they *do* have the offset field from the
|
2003-01-23 09:04:54 +00:00
|
|
|
* ARCNET hardware packet, but we should never see an exception frame
|
|
|
|
* header.
|
2003-01-23 04:04:01 +00:00
|
|
|
*/
|
|
|
|
static void
|
|
|
|
dissect_arcnet_linux (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
|
|
|
|
{
|
2012-10-18 22:22:25 +00:00
|
|
|
dissect_arcnet_common (tvb, pinfo, tree, TRUE, FALSE);
|
2003-01-23 04:04:01 +00:00
|
|
|
}
|
2002-10-18 21:00:01 +00:00
|
|
|
|
|
|
|
static const value_string arcnet_prot_id_vals[] = {
|
2003-01-23 04:04:01 +00:00
|
|
|
{ARCNET_PROTO_IP_1051, "RFC 1051 IP"},
|
|
|
|
{ARCNET_PROTO_ARP_1051, "RFC 1051 ARP"},
|
|
|
|
{ARCNET_PROTO_IP_1201, "RFC 1201 IP"},
|
|
|
|
{ARCNET_PROTO_ARP_1201, "RFC 1201 ARP"},
|
|
|
|
{ARCNET_PROTO_RARP_1201, "RFC 1201 RARP"},
|
|
|
|
{ARCNET_PROTO_IPX, "IPX"},
|
|
|
|
{ARCNET_PROTO_NOVELL_EC, "Novell of some sort"},
|
|
|
|
{ARCNET_PROTO_IPv6, "IPv6"},
|
|
|
|
{ARCNET_PROTO_ETHERNET, "Encapsulated Ethernet"},
|
|
|
|
{ARCNET_PROTO_DATAPOINT_BOOT, "Datapoint boot"},
|
|
|
|
{ARCNET_PROTO_DATAPOINT_MOUNT, "Datapoint mount"},
|
|
|
|
{ARCNET_PROTO_POWERLAN_BEACON, "PowerLAN beacon"},
|
|
|
|
{ARCNET_PROTO_POWERLAN_BEACON2, "PowerLAN beacon2"},
|
|
|
|
{ARCNET_PROTO_APPLETALK, "Appletalk"},
|
|
|
|
{ARCNET_PROTO_BANYAN, "Banyan VINES"},
|
|
|
|
{ARCNET_PROTO_DIAGNOSE, "Diagnose"},
|
2003-01-23 10:11:54 +00:00
|
|
|
{ARCNET_PROTO_BACNET, "BACnet"},
|
2003-01-23 04:04:01 +00:00
|
|
|
{0, NULL}
|
2002-10-18 21:00:01 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
void
|
|
|
|
proto_register_arcnet (void)
|
|
|
|
{
|
|
|
|
|
|
|
|
/* Setup list of header fields See Section 1.6.1 for details*/
|
|
|
|
static hf_register_info hf[] = {
|
|
|
|
{&hf_arcnet_src,
|
|
|
|
{"Source", "arcnet.src",
|
|
|
|
FT_UINT8, BASE_HEX, NULL, 0,
|
|
|
|
"Source ID", HFILL}
|
|
|
|
},
|
|
|
|
{&hf_arcnet_dst,
|
|
|
|
{"Dest", "arcnet.dst",
|
|
|
|
FT_UINT8, BASE_HEX, NULL, 0,
|
|
|
|
"Dest ID", HFILL}
|
|
|
|
},
|
2003-01-23 04:04:01 +00:00
|
|
|
{&hf_arcnet_offset,
|
|
|
|
{"Offset", "arcnet.offset",
|
|
|
|
FT_BYTES, BASE_NONE, NULL, 0,
|
From Kovarththanan Rajaratnam via bug 3548:
(1) Trailing/leading spaces are removed from 'name's/'blurb's
(2) Duplicate 'blurb's are replaced with NULL
(3) Empty ("") 'blurb's are replaced with NULL
(4) BASE_NONE, NULL, 0x0 are used for 'display', 'strings' and 'bitmask' fields
for FT_NONE, FT_BYTES, FT_IPv4, FT_IPv6, FT_ABSOLUTE_TIME, FT_RELATIVE_TIME,
FT_PROTOCOL, FT_STRING and FT_STRINGZ field types
(5) Only allow non-zero value for 'display' if 'bitmask' is non-zero
svn path=/trunk/; revision=28770
2009-06-18 21:30:42 +00:00
|
|
|
NULL, HFILL}
|
2003-01-23 04:04:01 +00:00
|
|
|
},
|
2002-10-18 21:00:01 +00:00
|
|
|
{&hf_arcnet_protID,
|
|
|
|
{"Protocol ID", "arcnet.protID",
|
|
|
|
FT_UINT8, BASE_HEX, VALS(arcnet_prot_id_vals), 0,
|
|
|
|
"Proto type", HFILL}
|
|
|
|
},
|
2003-01-23 04:04:01 +00:00
|
|
|
{&hf_arcnet_split_flag,
|
|
|
|
{"Split Flag", "arcnet.split_flag",
|
|
|
|
FT_UINT8, BASE_DEC, NULL, 0,
|
2010-09-23 21:46:31 +00:00
|
|
|
NULL, HFILL}
|
2003-01-23 04:04:01 +00:00
|
|
|
},
|
2003-01-23 07:55:28 +00:00
|
|
|
{&hf_arcnet_exception_flag,
|
|
|
|
{"Exception Flag", "arcnet.exception_flag",
|
|
|
|
FT_UINT8, BASE_HEX, NULL, 0,
|
2010-09-23 21:46:31 +00:00
|
|
|
NULL, HFILL}
|
2003-01-23 07:55:28 +00:00
|
|
|
},
|
2003-01-23 04:04:01 +00:00
|
|
|
{&hf_arcnet_sequence,
|
|
|
|
{"Sequence", "arcnet.sequence",
|
|
|
|
FT_UINT16, BASE_DEC, NULL, 0,
|
|
|
|
"Sequence number", HFILL}
|
|
|
|
},
|
2002-10-18 21:00:01 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
/* Setup protocol subtree array */
|
|
|
|
static gint *ett[] = {
|
|
|
|
&ett_arcnet,
|
|
|
|
};
|
|
|
|
|
|
|
|
arcnet_dissector_table = register_dissector_table ("arcnet.protocol_id",
|
2012-04-23 17:50:02 +00:00
|
|
|
"ARCNET Protocol ID",
|
|
|
|
FT_UINT8, BASE_HEX);
|
2002-10-18 21:00:01 +00:00
|
|
|
|
|
|
|
/* Register the protocol name and description */
|
|
|
|
proto_arcnet = proto_register_protocol ("ARCNET", "ARCNET", "arcnet");
|
|
|
|
|
|
|
|
/* Required function calls to register the header fields and subtrees used */
|
|
|
|
proto_register_field_array (proto_arcnet, hf, array_length (hf));
|
|
|
|
proto_register_subtree_array (ett, array_length (ett));
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
proto_reg_handoff_arcnet (void)
|
|
|
|
{
|
2003-01-23 04:04:01 +00:00
|
|
|
dissector_handle_t arcnet_handle, arcnet_linux_handle;
|
2002-10-18 21:00:01 +00:00
|
|
|
|
|
|
|
arcnet_handle = create_dissector_handle (dissect_arcnet, proto_arcnet);
|
2010-12-20 05:35:29 +00:00
|
|
|
dissector_add_uint ("wtap_encap", WTAP_ENCAP_ARCNET, arcnet_handle);
|
2003-01-23 04:04:01 +00:00
|
|
|
|
|
|
|
arcnet_linux_handle = create_dissector_handle (dissect_arcnet_linux,
|
2012-04-23 17:50:02 +00:00
|
|
|
proto_arcnet);
|
2010-12-20 05:35:29 +00:00
|
|
|
dissector_add_uint ("wtap_encap", WTAP_ENCAP_ARCNET_LINUX, arcnet_linux_handle);
|
2002-10-18 21:00:01 +00:00
|
|
|
data_handle = find_dissector ("data");
|
|
|
|
}
|