forked from osmocom/wireshark
366 lines
13 KiB
C
366 lines
13 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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* 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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* References:
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* ETSI TS 129 171 V9.2.0 (2010-10)
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*/
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#include "config.h"
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#include <math.h>
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#include <epan/packet.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 <epan/expert.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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#include "packet-lcsap.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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void proto_register_lcsap(void);
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void proto_reg_handoff_lcsap(void);
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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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/* Initialize the protocol and registered fields */
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static int proto_lcsap = -1;
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static int hf_lcsap_pos_method = -1;
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static int hf_lcsap_pos_usage = -1;
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static int hf_lcsap_gnss_pos_method = -1;
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static int hf_lcsap_gnss_id = -1;
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static int hf_lcsap_gnss_pos_usage = -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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static int ett_lcsap_plmnd_id = -1;
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static int ett_lcsap_imsi = -1;
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static int ett_lcsap_civic_address = -1;
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#include "packet-lcsap-ett.c"
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static expert_field ei_lcsap_civic_data_not_xml = EI_INIT;
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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 handles */
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static dissector_handle_t lcsap_handle;
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static dissector_handle_t xml_handle;
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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, void *);
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static int dissect_ProtocolExtensionFieldExtensionValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *);
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static int dissect_InitiatingMessageValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *);
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static int dissect_SuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *);
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static int dissect_UnsuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *);
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/* 7.4.13 Positioning Data
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* Coding of positioning method (bits 8-4)
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*/
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static const value_string lcsap_pos_method_vals[] = {
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{ 0x00, "Cell ID" },
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{ 0x01, "Reserved" },
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{ 0x02, "E-CID" },
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{ 0x03, "Reserved" },
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{ 0x04, "OTDOA" },
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{ 0x05, "Reserved" },
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{ 0x06, "Reserved" },
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{ 0x07, "Reserved" },
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{ 0x08, "U-TDOA" },
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{ 0x09, "Reserved" },
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{ 0x0a, "Reserved" },
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{ 0x0b, "Reserved" },
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{ 0x0c, "Reserved for other location technologies" },
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{ 0x0d, "Reserved for other location technologies" },
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{ 0x0e, "Reserved for other location technologies" },
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{ 0x0f, "Reserved for other location technologies" },
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{ 0x10, "Reserved for network specific positioning methods" },
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{ 0x11, "Reserved for network specific positioning methods" },
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{ 0x12, "Reserved for network specific positioning methods" },
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{ 0x13, "Reserved for network specific positioning methods" },
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{ 0x14, "Reserved for network specific positioning methods" },
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{ 0x15, "Reserved for network specific positioning methods" },
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{ 0x16, "Reserved for network specific positioning methods" },
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{ 0x17, "Reserved for network specific positioning methods" },
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{ 0x18, "Reserved for network specific positioning methods" },
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{ 0x19, "Reserved for network specific positioning methods" },
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{ 0x1a, "Reserved for network specific positioning methods" },
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{ 0x1b, "Reserved for network specific positioning methods" },
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{ 0x1c, "RReserved for network specific positioning methods" },
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{ 0x1d, "Reserved for network specific positioning methods" },
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{ 0x1e, "Reserved for network specific positioning methods" },
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{ 0x0f, "Reserved for network specific positioning methods" },
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{ 0, NULL }
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};
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/* Coding of usage (bits 3-1)*/
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static const value_string lcsap_pos_usage_vals[] = {
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{ 0x00, "Attempted unsuccessfully due to failure or interruption - not used" },
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{ 0x01, "Attempted successfully: results not used to generate location - not used." },
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{ 0x02, "Attempted successfully: results used to verify but not generate location - not used." },
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{ 0x03, "Attempted successfully: results used to generate location" },
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{ 0x04, "Attempted successfully: case where UE supports multiple mobile based positioning methods and the actual method or methods used by the UE cannot be determined." },
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{ 0x05, "Reserved" },
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{ 0x06, "Reserved" },
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{ 0x07, "Reserved" },
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{ 0, NULL }
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};
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/* Coding of Method (Bits 8-7) */
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static const value_string lcsap_gnss_pos_method_vals[] = {
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{ 0x00, "UE-Based" },
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{ 0x01, "UE-Assisted" },
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{ 0x02, "Conventional" },
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{ 0x03, "Reserved" },
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{ 0, NULL }
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};
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/* Coding of GNSS ID (Bits 6-4) */
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static const value_string lcsap_gnss_id_vals[] = {
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{ 0x00, "GPS" },
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{ 0x01, "Galileo" },
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{ 0x02, "SBAS" },
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{ 0x03, "Modernized GPS" },
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{ 0x04, "QZSS" },
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{ 0x05, "GLONASS" },
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{ 0x06, "Reserved" },
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{ 0x07, "Reserved" },
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{ 0, NULL }
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};
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/* Coding of usage (bits 3- 1) */
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static const value_string lcsap_gnss_pos_usage_vals[] = {
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{ 0x00, "Attempted unsuccessfully due to failure or interruption" },
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{ 0x01, "Attempted successfully: results not used to generate location" },
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{ 0x02, "Attempted successfully: results used to verify but not generate location" },
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{ 0x03, "Attempted successfully: results used to generate location" },
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{ 0x04, "Attempted successfully: case where UE supports multiple mobile based positioning methods and the actual method or methods used by the UE cannot be determined." },
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{ 0x05, "Reserved" },
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{ 0x06, "Reserved" },
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{ 0x07, "Reserved" },
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{ 0, NULL }
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};
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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, void *data _U_)
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{
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return (dissector_try_uint(lcsap_ies_dissector_table, ProtocolIE_ID, tvb, pinfo, tree)) ? tvb_captured_length(tvb) : 0;
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}
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static int dissect_ProtocolExtensionFieldExtensionValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
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{
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return (dissector_try_uint(lcsap_extension_dissector_table, ProtocolExtensionID, tvb, pinfo, tree)) ? tvb_captured_length(tvb) : 0;
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}
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static int dissect_InitiatingMessageValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
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{
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return (dissector_try_uint(lcsap_proc_imsg_dissector_table, ProcedureCode, tvb, pinfo, tree)) ? tvb_captured_length(tvb) : 0;
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}
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static int dissect_SuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
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{
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return (dissector_try_uint(lcsap_proc_sout_dissector_table, ProcedureCode, tvb, pinfo, tree)) ? tvb_captured_length(tvb) : 0;
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}
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static int dissect_UnsuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
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{
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return (dissector_try_uint(lcsap_proc_uout_dissector_table, ProcedureCode, tvb, pinfo, tree)) ? tvb_captured_length(tvb) : 0;
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}
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static int
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dissect_lcsap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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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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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, NULL);
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return tvb_captured_length(tvb);
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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 guint SctpPort;
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if (!Initialized) {
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lpp_handle = find_dissector_add_dependency("lpp", proto_lcsap);
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lppa_handle = find_dissector_add_dependency("lppa", proto_lcsap);
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dissector_add_for_decode_as("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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/* 7.4.13 Positioning Data */
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{ &hf_lcsap_pos_method,
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{ "Positioning Method", "lcsap.pos_method",
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FT_UINT8, BASE_DEC, VALS(lcsap_pos_method_vals), 0xf8,
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NULL, HFILL }
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},
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{ &hf_lcsap_pos_usage,
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{ "Positioning usage", "lcsap.pos_usage",
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FT_UINT8, BASE_DEC, VALS(lcsap_pos_usage_vals), 0x07,
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NULL, HFILL }
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},
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{ &hf_lcsap_gnss_pos_method,
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{ "GNSS Positioning Method", "lcsap.gnss_pos_method",
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FT_UINT8, BASE_DEC, VALS(lcsap_gnss_pos_method_vals), 0xc0,
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NULL, HFILL }
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},
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{ &hf_lcsap_gnss_id,
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{ "GNSS ID", "lcsap.gnss_id",
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FT_UINT8, BASE_DEC, VALS(lcsap_gnss_id_vals), 0x38,
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NULL, HFILL }
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},
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{ &hf_lcsap_gnss_pos_usage,
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{ "GNSS Positioning usage", "lcsap.gnss_pos_usage",
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FT_UINT8, BASE_DEC, VALS(lcsap_gnss_pos_usage_vals), 0x07,
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NULL, HFILL }
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},
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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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&ett_lcsap_plmnd_id,
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&ett_lcsap_imsi,
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&ett_lcsap_civic_address,
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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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expert_module_t *expert_lcsap;
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static ei_register_info ei[] = {
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{ &ei_lcsap_civic_data_not_xml,
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{ "lcsap.civic_data_not_xml", PI_PROTOCOL, PI_ERROR, "Shold contain a UTF-8 encoded PIDF - LO XML document as defined in IETF RFC 4119", EXPFILL } },
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};
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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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lcsap_handle = 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", proto_lcsap, FT_UINT32, BASE_DEC);
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expert_lcsap = expert_register_protocol(proto_lcsap);
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expert_register_field_array(expert_lcsap, ei, array_length(ei));
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lcsap_extension_dissector_table = register_dissector_table("lcsap.extension", "LCS-AP-PROTOCOL-EXTENSION", proto_lcsap, FT_UINT32, BASE_DEC);
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lcsap_proc_imsg_dissector_table = register_dissector_table("lcsap.proc.imsg", "LCS-AP-ELEMENTARY-PROCEDURE InitiatingMessage", proto_lcsap, FT_UINT32, BASE_DEC);
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lcsap_proc_sout_dissector_table = register_dissector_table("lcsap.proc.sout", "LCS-AP-ELEMENTARY-PROCEDURE SuccessfulOutcome", proto_lcsap, FT_UINT32, BASE_DEC);
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lcsap_proc_uout_dissector_table = register_dissector_table("lcsap.proc.uout", "LCS-AP-ELEMENTARY-PROCEDURE UnsuccessfulOutcome", proto_lcsap, 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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xml_handle = find_dissector_add_dependency("xml", proto_lcsap);
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}
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/*
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* Editor modelines
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*
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* Local Variables:
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* c-basic-offset: 2
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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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* ex: set shiftwidth=2 tabstop=8 expandtab:
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* :indentSize=2:tabSize=8:noTabs=true:
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*/
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