forked from osmocom/wireshark
218 lines
7.2 KiB
C
218 lines
7.2 KiB
C
/* packet-lcsap.c
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* Routines for LCS-AP packet dissembly.
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*
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* Copyright (c) 2011 by Spenser Sheng <spenser.sheng@ericsson.com>
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*
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* $Id: packet-lcsap.c 28770 2011-06-18 21:30:42Z stig Spenser Sheng$
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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* References:
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* ETSI TS 129 171 V9.2.0 (2010-10)
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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 <stdio.h>
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#include <string.h>
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#include <ctype.h>
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#include <epan/strutil.h>
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#include <epan/asn1.h>
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#include <epan/prefs.h>
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#include <epan/sctpppids.h>
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#include "packet-ber.h"
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#include "packet-per.h"
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#include "packet-e212.h"
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#include "packet-sccp.h"
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#ifdef _MSC_VER
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/* disable: "warning C4146: unary minus operator applied to unsigned type, result still unsigned" */
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#pragma warning(disable:4146)
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#endif
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#define PNAME "LCS Application Protocol"
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#define PSNAME "LCSAP"
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#define PFNAME "lcsap"
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static dissector_handle_t lpp_handle;
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static dissector_handle_t lppa_handle;
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#define SCTP_PORT_LCSAP 9082
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#include "packet-lcsap-val.h"
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/* Strcture to hold ProcedureCode */
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struct pro_code {
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guint8 code;
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} _pro_code;
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/* Initialize the protocol and registered fields */
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static int proto_lcsap = -1;
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#include "packet-lcsap-hf.c"
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/* Initialize the subtree pointers */
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static int ett_lcsap = -1;
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#include "packet-lcsap-ett.c"
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/* Global variables */
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static guint32 ProcedureCode;
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static guint32 ProtocolIE_ID;
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static guint32 ProtocolExtensionID;
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static guint32 PayloadType = -1;
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static guint gbl_lcsapSctpPort=SCTP_PORT_LCSAP;
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/* Dissector tables */
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static dissector_table_t lcsap_ies_dissector_table;
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static dissector_table_t lcsap_extension_dissector_table;
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static dissector_table_t lcsap_proc_imsg_dissector_table;
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static dissector_table_t lcsap_proc_sout_dissector_table;
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static dissector_table_t lcsap_proc_uout_dissector_table;
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static int dissect_ProtocolIEFieldValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
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static int dissect_ProtocolExtensionFieldExtensionValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
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static int dissect_InitiatingMessageValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
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static int dissect_SuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
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static int dissect_UnsuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
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#include "packet-lcsap-fn.c"
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static int dissect_ProtocolIEFieldValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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return (dissector_try_uint(lcsap_ies_dissector_table, ProtocolIE_ID, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
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}
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static int dissect_ProtocolExtensionFieldExtensionValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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return (dissector_try_uint(lcsap_extension_dissector_table, ProtocolExtensionID, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
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}
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static int dissect_InitiatingMessageValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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return (dissector_try_uint(lcsap_proc_imsg_dissector_table, ProcedureCode, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
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}
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static int dissect_SuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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return (dissector_try_uint(lcsap_proc_sout_dissector_table, ProcedureCode, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
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}
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static int dissect_UnsuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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return (dissector_try_uint(lcsap_proc_uout_dissector_table, ProcedureCode, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
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}
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static void
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dissect_lcsap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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proto_item *lcsap_item = NULL;
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proto_tree *lcsap_tree = NULL;
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/* make entry in the Protocol column on summary display */
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if (check_col(pinfo->cinfo, COL_PROTOCOL))
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "LCSAP");
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/* create the lcsap protocol tree */
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lcsap_item = proto_tree_add_item(tree, proto_lcsap, tvb, 0, -1, ENC_NA);
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lcsap_tree = proto_item_add_subtree(lcsap_item, ett_lcsap);
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dissect_LCS_AP_PDU_PDU(tvb, pinfo, lcsap_tree);
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}
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/*--- proto_reg_handoff_lcsap ---------------------------------------*/
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void
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proto_reg_handoff_lcsap(void)
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{
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static gboolean Initialized=FALSE;
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static dissector_handle_t lcsap_handle;
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static guint SctpPort;
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if (!Initialized) {
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lcsap_handle = find_dissector("lcsap");
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lpp_handle = find_dissector("lpp");
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lppa_handle = find_dissector("lppa");
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dissector_add_handle("sctp.port", lcsap_handle); /* for "decode-as" */
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dissector_add_uint("sctp.ppi", LCS_AP_PAYLOAD_PROTOCOL_ID, lcsap_handle);
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Initialized=TRUE;
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#include "packet-lcsap-dis-tab.c"
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} else {
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if (SctpPort != 0) {
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dissector_delete_uint("sctp.port", SctpPort, lcsap_handle);
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}
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}
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SctpPort=gbl_lcsapSctpPort;
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if (SctpPort != 0) {
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dissector_add_uint("sctp.port", SctpPort, lcsap_handle);
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}
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}
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/*--- proto_register_lcsap -------------------------------------------*/
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void proto_register_lcsap(void) {
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/* List of fields */
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static hf_register_info hf[] = {
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#include "packet-lcsap-hfarr.c"
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};
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/* List of subtrees */
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static gint *ett[] = {
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&ett_lcsap,
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#include "packet-lcsap-ettarr.c"
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};
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module_t *lcsap_module;
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/* Register protocol */
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proto_lcsap = proto_register_protocol(PNAME, PSNAME, PFNAME);
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/* Register fields and subtrees */
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proto_register_field_array(proto_lcsap, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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register_dissector("lcsap", dissect_lcsap, proto_lcsap);
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/* Register dissector tables */
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lcsap_ies_dissector_table = register_dissector_table("lcsap.ies", "LCS-AP-PROTOCOL-IES", FT_UINT32, BASE_DEC);
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lcsap_extension_dissector_table = register_dissector_table("lcsap.extension", "LCS-AP-PROTOCOL-EXTENSION", FT_UINT32, BASE_DEC);
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lcsap_proc_imsg_dissector_table = register_dissector_table("lcsap.proc.imsg", "LCS-AP-ELEMENTARY-PROCEDURE InitiatingMessage", FT_UINT32, BASE_DEC);
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lcsap_proc_sout_dissector_table = register_dissector_table("lcsap.proc.sout", "LCS-AP-ELEMENTARY-PROCEDURE SuccessfulOutcome", FT_UINT32, BASE_DEC);
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lcsap_proc_uout_dissector_table = register_dissector_table("lcsap.proc.uout", "LCS-AP-ELEMENTARY-PROCEDURE UnsuccessfulOutcome", FT_UINT32, BASE_DEC);
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/* Register configuration options for ports */
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lcsap_module = prefs_register_protocol(proto_lcsap, proto_reg_handoff_lcsap);
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prefs_register_uint_preference(lcsap_module, "sctp.port",
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"LCSAP SCTP Port",
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"Set the SCTP port for LCSAP messages",
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10,
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&gbl_lcsapSctpPort);
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}
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