2001-01-07 22:08:31 +00:00
|
|
|
/* packet-fr.c
|
|
|
|
* Routines for Frame Relay dissection
|
|
|
|
*
|
|
|
|
* Copyright 2001, Paul Ionescu <paul@acorp.ro>
|
|
|
|
*
|
2001-01-09 09:59:28 +00:00
|
|
|
* $Id: packet-fr.c,v 1.5 2001/01/09 09:59:28 guy Exp $
|
2001-01-07 22:08:31 +00:00
|
|
|
*
|
|
|
|
* Ethereal - Network traffic analyzer
|
|
|
|
* By Gerald Combs <gerald@zing.org>
|
|
|
|
* 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.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
|
|
# include "config.h"
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#include <stdio.h>
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include <ctype.h>
|
|
|
|
|
|
|
|
#include <string.h>
|
|
|
|
#include <glib.h>
|
|
|
|
#include "packet.h"
|
|
|
|
#include "packet-ip.h"
|
|
|
|
#include "packet-ipx.h"
|
|
|
|
#include "packet-arp.h"
|
|
|
|
|
|
|
|
|
|
|
|
static gint proto_fr = -1;
|
|
|
|
static gint ett_fr = -1;
|
|
|
|
static gint hf_fr_dlci = -1;
|
|
|
|
static gint hf_fr_cr = -1;
|
|
|
|
static gint hf_fr_becn = -1;
|
|
|
|
static gint hf_fr_fecn = -1;
|
|
|
|
static gint hf_fr_de = -1;
|
|
|
|
static gint hf_fr_proto = -1;
|
|
|
|
|
2001-01-09 09:59:28 +00:00
|
|
|
static dissector_handle_t ip_handle;
|
|
|
|
static dissector_handle_t ipx_handle;
|
|
|
|
|
2001-01-07 22:08:31 +00:00
|
|
|
static void dissect_fr(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
|
|
{
|
|
|
|
proto_item *ti;
|
|
|
|
proto_tree *fr_tree;
|
|
|
|
guint16 fr_header,fr_proto;
|
|
|
|
tvbuff_t *next_tvb;
|
|
|
|
|
|
|
|
CHECK_DISPLAY_AS_DATA(proto_fr, tvb, pinfo, tree);
|
|
|
|
|
|
|
|
pinfo->current_proto = "Frame Relay";
|
|
|
|
if (check_col(pinfo->fd, COL_PROTOCOL))
|
|
|
|
col_set_str(pinfo->fd, COL_PROTOCOL, "FR");
|
|
|
|
if (check_col(pinfo->fd, COL_INFO))
|
|
|
|
col_clear(pinfo->fd, COL_INFO);
|
|
|
|
|
|
|
|
fr_header = tvb_get_ntohs( tvb, 0 );
|
|
|
|
fr_proto = tvb_get_ntohs( tvb, 2 );
|
|
|
|
if (check_col(pinfo->fd, COL_INFO))
|
|
|
|
col_add_fstr(pinfo->fd, COL_INFO, "DLCI %u, proto 0x%04x",
|
|
|
|
((fr_header&0x00FF)>>4)+((fr_header&0xFC00)>>6),
|
|
|
|
fr_proto);
|
|
|
|
|
|
|
|
if (tree) {
|
|
|
|
|
|
|
|
ti = proto_tree_add_protocol_format(tree, proto_fr, tvb, 0, 4, "Frame Relay");
|
|
|
|
fr_tree = proto_item_add_subtree(ti, ett_fr);
|
|
|
|
|
|
|
|
proto_tree_add_text(fr_tree,tvb,0,2,"The real DLCI is %u",((fr_header&0x00FF)>>4)+((fr_header&0xFC00)>>6));
|
|
|
|
proto_tree_add_uint(fr_tree, hf_fr_dlci, tvb, 0, 2, fr_header);
|
|
|
|
proto_tree_add_boolean(fr_tree, hf_fr_cr, tvb, 0, 1, fr_header);
|
|
|
|
proto_tree_add_boolean(fr_tree, hf_fr_fecn, tvb, 1, 1, fr_header);
|
|
|
|
proto_tree_add_boolean(fr_tree, hf_fr_becn, tvb, 1, 1, fr_header);
|
|
|
|
proto_tree_add_boolean(fr_tree, hf_fr_de, tvb, 1, 1, fr_header);
|
|
|
|
proto_tree_add_uint(fr_tree, hf_fr_proto,tvb, 2, 2, fr_proto );
|
2001-01-07 22:18:32 +00:00
|
|
|
}
|
2001-01-07 22:08:31 +00:00
|
|
|
|
2001-01-07 22:18:32 +00:00
|
|
|
next_tvb = tvb_new_subset(tvb, 4, -1, -1);
|
2001-01-07 22:08:31 +00:00
|
|
|
|
2001-01-07 22:18:32 +00:00
|
|
|
switch (fr_proto){
|
|
|
|
/* case 0x0703:
|
|
|
|
dissect_lmi(next_tvb,pinfo,tree);
|
|
|
|
break;
|
2001-01-07 22:08:31 +00:00
|
|
|
this is not yet implemented
|
|
|
|
*/
|
2001-01-07 22:18:32 +00:00
|
|
|
case 0x0800:
|
2001-01-09 09:59:28 +00:00
|
|
|
call_dissector(ip_handle,next_tvb,pinfo,tree);
|
2001-01-07 22:18:32 +00:00
|
|
|
break;
|
|
|
|
case 0x8137:
|
2001-01-09 09:59:28 +00:00
|
|
|
call_dissector(ipx_handle,next_tvb,pinfo,tree);
|
2001-01-07 22:18:32 +00:00
|
|
|
break;
|
|
|
|
default:
|
|
|
|
dissect_data(next_tvb,0,pinfo,tree);
|
|
|
|
break;
|
2001-01-07 22:08:31 +00:00
|
|
|
}
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Register the protocol with Ethereal */
|
|
|
|
void proto_register_fr(void)
|
|
|
|
{
|
|
|
|
static hf_register_info hf[] = {
|
|
|
|
{ &hf_fr_dlci, {
|
|
|
|
"DLCI", "fr.dlci", FT_UINT16, BASE_DEC,
|
|
|
|
NULL, 0xFCF0, "Data-Link Connection Identifier" }},
|
|
|
|
{ &hf_fr_cr, {
|
|
|
|
"CR", "fr.cr", FT_BOOLEAN, 16,
|
|
|
|
NULL, 0x0200, "Command/Response" }},
|
|
|
|
{ &hf_fr_fecn, {
|
|
|
|
"FECN", "fr.fecn", FT_BOOLEAN, 16,
|
|
|
|
NULL, 0x0008, "Forward Explicit Congestion Notification" }},
|
|
|
|
{ &hf_fr_becn, {
|
|
|
|
"BECN", "fr.becn", FT_BOOLEAN, 16,
|
|
|
|
NULL, 0x0004, "Backward Explicit Congestion Notification" }},
|
|
|
|
{ &hf_fr_de, {
|
|
|
|
"DE", "fr.de", FT_BOOLEAN, 16,
|
|
|
|
NULL, 0x0002, "Discard Eligibility" }},
|
|
|
|
{ &hf_fr_proto, {
|
|
|
|
"Encapsulated Protocol", "fr.proto", FT_UINT16, BASE_HEX,
|
|
|
|
NULL, 0x0, "FrameRelay Encapsulated Protocol" }},
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
/* Setup protocol subtree array */
|
|
|
|
static gint *ett[] = {
|
|
|
|
&ett_fr,
|
|
|
|
};
|
|
|
|
|
|
|
|
proto_fr = proto_register_protocol("Frame Relay", "FR", "fr");
|
|
|
|
proto_register_field_array(proto_fr, hf, array_length(hf));
|
|
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
|
2001-01-09 06:32:10 +00:00
|
|
|
register_dissector("fr", dissect_fr, proto_fr);
|
2001-01-07 22:08:31 +00:00
|
|
|
};
|
2001-01-08 22:18:22 +00:00
|
|
|
|
|
|
|
void proto_reg_handoff_fr(void)
|
|
|
|
{
|
2001-01-09 09:59:28 +00:00
|
|
|
/*
|
|
|
|
* Get handles for the IP and IPX dissectors.
|
|
|
|
*/
|
|
|
|
ip_handle = find_dissector("ip");
|
|
|
|
ipx_handle = find_dissector("ipx");
|
|
|
|
|
2001-01-09 06:32:10 +00:00
|
|
|
dissector_add("wtap_encap", WTAP_ENCAP_FRELAY, dissect_fr, proto_fr);
|
2001-01-08 22:18:22 +00:00
|
|
|
}
|