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/* packet-pcli.c
* Routines for Packet Cable Lawful Intercept packet disassembly
* Packet Cable Lawful Intercept is detailed at
* http://www.packetcable.com/downloads/specs/pkt-sp-esp-I01-991229.pdf
* Chapter 4 ( Call Content Connection Interface )
*
* $Id$
*
* Copyright (c) 2000 by Ed Warnicke <hagbard@physics.rutgers.edu>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1999 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.
*/
/* Include files */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <time.h>
#include <string.h>
#include <glib.h>
#include <epan/packet.h>
#include <epan/addr_resolv.h>
#include <epan/prefs.h>
#include <epan/strutil.h>
/* Define udp_port for lawful intercept */
#define UDP_PORT_PCLI 9000
void proto_reg_handoff_pcli(void);
/* Define the pcli proto */
static int proto_pcli = -1;
/* Define headers for pcli */
static int hf_pcli_cccid = -1;
/* Define the tree for pcli */
static int ett_pcli = -1;
/*
* Here are the global variables associated with the preferences
* for pcli
*/
static guint global_udp_port_pcli = UDP_PORT_PCLI;
static guint udp_port_pcli = UDP_PORT_PCLI;
/* A static handle for the ip dissector */
static dissector_handle_t ip_handle;
static void
dissect_pcli(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) {
guint32 cccid;
proto_tree *ti,*pcli_tree;
tvbuff_t * next_tvb;
/* Set the protocol column */
if(check_col(pinfo->cinfo,COL_PROTOCOL)){
col_add_str(pinfo->cinfo,COL_PROTOCOL,"PCLI");
}
/* Get the CCCID */
cccid = tvb_get_ntohl(tvb,0);
/* Set the info column */
if(check_col(pinfo->cinfo,COL_INFO)){
col_add_fstr(pinfo->cinfo, COL_INFO, "CCCID: %u",cccid);
}
/*
*If we have a non-null tree (ie we are building the proto_tree
* instead of just filling out the columns ), then add a PLCI
* tree node and put a CCCID header element under it.
*/
if(tree) {
ti = proto_tree_add_item(tree,proto_pcli,tvb,0,0,FALSE);
pcli_tree = proto_item_add_subtree(ti,ett_pcli);
proto_tree_add_uint(pcli_tree,hf_pcli_cccid,tvb,
0,4,cccid);
}
/*
* Hand off to the IP dissector.
*/
next_tvb = tvb_new_subset(tvb,4,-1,-1);
call_dissector(ip_handle,next_tvb,pinfo,tree);
}
void
proto_register_pcli(void) {
static hf_register_info hf[] = {
{ &hf_pcli_cccid,
{ "CCCID", "pcli.cccid", FT_UINT32, BASE_DEC, NULL, 0x0,
"Call Content Connection Identifier", HFILL }},
};
static gint *ett[] = {
&ett_pcli,
};
module_t *pcli_module;
proto_pcli = proto_register_protocol("Packet Cable Lawful Intercept",
"PCLI","pcli");
proto_register_field_array(proto_pcli,hf,array_length(hf));
proto_register_subtree_array(ett,array_length(ett));
pcli_module = prefs_register_protocol(proto_pcli,
proto_reg_handoff_pcli);
prefs_register_uint_preference(pcli_module, "udp_port",
"PCLI UDP Port",
"The UDP port on which "
"Packet Cable Lawful Intercept "
"packets will be sent",
10,&global_udp_port_pcli);
}
/* The registration hand-off routing */
void
proto_reg_handoff_pcli(void) {
static int pcli_initialized = FALSE;
static dissector_handle_t pcli_handle;
ip_handle = find_dissector("ip");
if(!pcli_initialized) {
pcli_handle = create_dissector_handle(dissect_pcli,proto_pcli);
pcli_initialized = TRUE;
} else {
dissector_delete("udp.port",udp_port_pcli,pcli_handle);
}
udp_port_pcli = global_udp_port_pcli;
dissector_add("udp.port",global_udp_port_pcli,pcli_handle);
}
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