164 lines
4.6 KiB
C
164 lines
4.6 KiB
C
/* packet-pcli.c
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* Routines for Packet Cable Lawful Intercept packet disassembly
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* Packet Cable Lawful Intercept is detailed at
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* http://www.cablelabs.com/specifications/archives/PKT-SP-ESP-I01-991229.pdf
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* Chapter 4 ( Call Content Connection Interface )
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*
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* Copyright (c) 2000 by Ed Warnicke <hagbard@physics.rutgers.edu>
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1999 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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*
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/* Include files */
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#include "config.h"
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#include <glib.h>
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#include <epan/packet.h>
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#include <epan/addr_resolv.h>
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#include <epan/prefs.h>
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#include <epan/strutil.h>
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void proto_register_pcli(void);
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void proto_reg_handoff_pcli(void);
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/* Define udp_port for lawful intercept */
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#define UDP_PORT_PCLI 0
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/* Define the pcli proto */
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static int proto_pcli = -1;
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/* Define headers for pcli */
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static int hf_pcli_cccid = -1;
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/* Define the tree for pcli */
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static int ett_pcli = -1;
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/*
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* Here are the global variables associated with the preferences
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* for pcli
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*/
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static guint global_udp_port_pcli = UDP_PORT_PCLI;
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/* A static handle for the ip dissector */
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static dissector_handle_t ip_handle;
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static void
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dissect_pcli(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) {
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guint32 cccid;
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proto_tree *ti,*pcli_tree;
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tvbuff_t * next_tvb;
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/* Set the protocol column */
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "PCLI");
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/* Get the CCCID */
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cccid = tvb_get_ntohl(tvb,0);
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/* Set the info column */
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col_add_fstr(pinfo->cinfo, COL_INFO, "CCCID: %u",cccid);
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/*
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*If we have a non-null tree (ie we are building the proto_tree
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* instead of just filling out the columns ), then add a PLCI
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* tree node and put a CCCID header element under it.
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*/
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if(tree) {
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ti = proto_tree_add_item(tree, proto_pcli, tvb, 0, 0, ENC_NA);
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pcli_tree = proto_item_add_subtree(ti,ett_pcli);
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proto_tree_add_uint(pcli_tree, hf_pcli_cccid, tvb, 0, 4, cccid);
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}
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/*
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* Hand off to the IP dissector.
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*/
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next_tvb = tvb_new_subset_remaining(tvb,4);
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call_dissector(ip_handle,next_tvb,pinfo,tree);
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}
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void
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proto_register_pcli(void) {
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static hf_register_info hf[] = {
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{ &hf_pcli_cccid,
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{ "CCCID", "pcli.cccid", FT_UINT32, BASE_DEC, NULL, 0x0,
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"Call Content Connection Identifier", HFILL }},
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};
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static gint *ett[] = {
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&ett_pcli,
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};
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module_t *pcli_module;
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proto_pcli = proto_register_protocol("Packet Cable Lawful Intercept",
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"PCLI","pcli");
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proto_register_field_array(proto_pcli,hf,array_length(hf));
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proto_register_subtree_array(ett,array_length(ett));
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pcli_module = prefs_register_protocol(proto_pcli, proto_reg_handoff_pcli);
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prefs_register_uint_preference(pcli_module, "udp_port",
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"PCLI UDP Port",
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"The UDP port on which "
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"Packet Cable Lawful Intercept "
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"packets will be sent",
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10,&global_udp_port_pcli);
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}
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/* The registration hand-off routing */
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void
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proto_reg_handoff_pcli(void) {
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static gboolean pcli_initialized = FALSE;
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static dissector_handle_t pcli_handle;
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static guint udp_port_pcli;
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if(!pcli_initialized) {
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pcli_handle = create_dissector_handle(dissect_pcli,proto_pcli);
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ip_handle = find_dissector("ip");
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pcli_initialized = TRUE;
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} else {
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dissector_delete_uint("udp.port",udp_port_pcli,pcli_handle);
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}
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udp_port_pcli = global_udp_port_pcli;
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dissector_add_uint("udp.port",global_udp_port_pcli,pcli_handle);
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}
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/*
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* Editor modelines - http://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 4
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* vi: set shiftwidth=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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