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/* packet-flexnet.c
*
* Routines for Amateur Packet Radio protocol dissection
* Copyright 2005,2006,2007,2008,2009,2010,2012 R.W. Stearn <richard@rns-stearn.demon.co.uk>
*
* $Id$
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/*
* Information on the protocol drawn from:
*
* Inspiration on how to build the dissector drawn from
* packet-sdlc.c
* packet-x25.c
* packet-lapb.c
* paket-gprs-llc.c
* xdlc.c
* with the base file built from README.developers.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <glib.h>
#include <epan/strutil.h>
#include <epan/packet.h>
#include <epan/emem.h>
#include <epan/xdlc.h>
#include <packet-ip.h>
#include "packet-flexnet.h"
#define FLEXNET_ADRLEN 15
#define FLEXNET_CTLLEN 15
#define FLEXNET_HDRLEN (FLEXNET_ADRLEN + FLEXNET_ADRLEN + FLEXNET_CTLLEN)
/* Forward declaration we need below */
void proto_reg_handoff_flexnet(void);
/* Dissector handles - all the possibles are listed */
static dissector_handle_t default_handle;
/* Initialize the protocol and registered fields */
static int proto_flexnet = -1;
static int hf_flexnet_dst = -1;
static int hf_flexnet_src = -1;
static int hf_flexnet_ctl = -1;
/* Initialize the subtree pointers */
static gint ett_flexnet = -1;
static gint ett_flexnet_ctl = -1;
/* Code to actually dissect the packets */
static void
dissect_flexnet(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree)
{
proto_item *ti;
proto_tree *flexnet_tree;
int offset;
void *saved_private_data;
tvbuff_t *next_tvb = NULL;
col_set_str( pinfo->cinfo, COL_PROTOCOL, "Flexnet");
col_clear( pinfo->cinfo, COL_INFO );
if ( parent_tree )
{
/* create display subtree for the protocol */
ti = proto_tree_add_protocol_format( parent_tree, proto_flexnet, tvb, 0, FLEXNET_HDRLEN, "FLEXNET" );
flexnet_tree = proto_item_add_subtree( ti, ett_flexnet );
offset = 0;
proto_tree_add_item( flexnet_tree, hf_flexnet_dst, tvb, offset, FLEXNET_ADRLEN, FALSE );
offset +=FLEXNET_ADRLEN;
proto_tree_add_item( flexnet_tree, hf_flexnet_src, tvb, offset, FLEXNET_ADRLEN, FALSE );
offset +=FLEXNET_ADRLEN;
proto_tree_add_item( flexnet_tree, hf_flexnet_ctl, tvb, offset, FLEXNET_CTLLEN, FALSE );
offset +=FLEXNET_CTLLEN;
}
/* Call sub-dissectors here */
saved_private_data = pinfo->private_data;
next_tvb = tvb_new_subset(tvb, FLEXNET_HDRLEN, -1, -1);
call_dissector( default_handle , next_tvb, pinfo, parent_tree );
pinfo->private_data = saved_private_data;
}
void
proto_register_flexnet(void)
{
/* Setup list of header fields */
static hf_register_info hf[] = {
{ &hf_flexnet_dst,
{ "Destination", "flexnet.dst",
FT_BYTES, BASE_NONE, NULL, 0x0,
"Destination address", HFILL }
},
{ &hf_flexnet_src,
{ "Source", "flexnet.src",
FT_BYTES, BASE_NONE, NULL, 0x0,
"Source address", HFILL }
},
{ &hf_flexnet_ctl,
{ "Control", "flexnet.ctl",
FT_BYTES, BASE_NONE, NULL, 0x0,
"Control ", HFILL }
},
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_flexnet,
&ett_flexnet_ctl,
};
/* Register the protocol name and description */
proto_flexnet = proto_register_protocol("FlexNet", "FLEXNET", "flexnet");
/* Register the dissector */
register_dissector( "flexnet", dissect_flexnet, proto_flexnet );
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array( proto_flexnet, hf, array_length( hf ) );
proto_register_subtree_array( ett, array_length( ett ) );
}
void
proto_reg_handoff_flexnet(void)
{
static gboolean inited = FALSE;
if( !inited ) {
/*
*/
default_handle = find_dissector( "data" );
inited = TRUE;
}
}
void
capture_flexnet( const guchar *pd, int offset, int len, packet_counts *ld)
{
const guchar *l_pd;
if ( ! BYTES_ARE_IN_FRAME( offset, len, FLEXNET_HDRLEN ) )
{
ld->other++;
return;
}
l_pd = pd;
}
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