forked from osmocom/wireshark
669db206cb
Also move ncp222.py, x11-fields, process-x11-fields.pl, make-reg-dotc, and make-reg-dotc.py. Adjust #include lines in files that include packet-*.h files. svn path=/trunk/; revision=11410
121 lines
3.8 KiB
C
121 lines
3.8 KiB
C
/* packet-clip.c
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* Routines for clip packet disassembly
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*
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* $Id$
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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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*
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* This file created by Thierry Andry <Thierry.Andry@advalvas.be>
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* from nearly-the-same packet-raw.c created by Mike Hall <mlh@io.com>
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* Copyright 1999
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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 <glib.h>
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#include <epan/packet.h>
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#include "packet-clip.h"
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#include "packet-ip.h"
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static gint ett_clip = -1;
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static dissector_handle_t ip_handle;
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void
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capture_clip( const guchar *pd, int len, packet_counts *ld ) {
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capture_ip(pd, 0, len, ld);
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}
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static void
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dissect_clip(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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proto_tree *fh_tree;
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proto_item *ti;
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pinfo->current_proto = "CLIP";
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/* load the top pane info. This should be overwritten by
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the next protocol in the stack */
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if(check_col(pinfo->cinfo, COL_RES_DL_SRC))
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col_set_str(pinfo->cinfo, COL_RES_DL_SRC, "N/A" );
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if(check_col(pinfo->cinfo, COL_RES_DL_DST))
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col_set_str(pinfo->cinfo, COL_RES_DL_DST, "N/A" );
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if(check_col(pinfo->cinfo, COL_PROTOCOL))
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "CLIP" );
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if(check_col(pinfo->cinfo, COL_INFO))
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col_set_str(pinfo->cinfo, COL_INFO, "Classical IP frame" );
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/* populate a tree in the second pane with the status of the link
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layer (ie none)
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XXX - the Linux Classical IP code supports both LLC Encapsulation,
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which puts an LLC header and possibly a SNAP header in front of
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the network-layer header, and VC Based Multiplexing, which puts
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no headers in front of the network-layer header.
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The ATM on Linux code includes a patch to "tcpdump"
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that compares the first few bytes of the packet with the
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LLC header that Classical IP frames may have and, if there's
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a SNAP LLC header at the beginning of the packet, it gets
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the packet type from that header and uses that, otherwise
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it treats the packet as being raw IP with no link-level
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header, in order to handle both of those.
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This code, however, won't handle LLC Encapsulation. We've
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not yet seen a capture taken on a machine using LLC Encapsulation,
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however. If we see one, we can modify the code.
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A future version of libpcap, however, will probably use DLT_LINUX_SLL
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for both of those cases, to avoid the headache of having to
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generate capture-filter code to handle both of those cases. */
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if(tree) {
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ti = proto_tree_add_text(tree, tvb, 0, 0, "Classical IP frame" );
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fh_tree = proto_item_add_subtree(ti, ett_clip);
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proto_tree_add_text(fh_tree, tvb, 0, 0, "No link information available");
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}
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call_dissector(ip_handle, tvb, pinfo, tree);
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}
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void
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proto_register_clip(void)
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{
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static gint *ett[] = {
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&ett_clip,
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};
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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_clip(void)
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{
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dissector_handle_t clip_handle;
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/*
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* Get a handle for the IP dissector.
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*/
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ip_handle = find_dissector("ip");
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clip_handle = create_dissector_handle(dissect_clip, -1);
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/* XXX - no protocol, can't be disabled */
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dissector_add("wtap_encap", WTAP_ENCAP_LINUX_ATM_CLIP, clip_handle);
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}
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