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/* packet-lcsap.c
* Routines for LCS-AP packet dissembly.
*
* Copyright (c) 2011 by Spenser Sheng <spenser.sheng@ericsson.com>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1999 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
* References:
* ETSI TS 129 171 V9.2.0 (2010-10)
*/
#include "config.h"
#include <math.h>
#include <epan/packet.h>
#include <epan/strutil.h>
#include <epan/asn1.h>
#include <epan/prefs.h>
#include <epan/sctpppids.h>
#include <epan/expert.h>
#include <wsutil/array.h>
#include "packet-ber.h"
#include "packet-per.h"
#include "packet-e212.h"
#include "packet-sccp.h"
#include "packet-lcsap.h"
#ifdef _MSC_VER
/* disable: "warning C4146: unary minus operator applied to unsigned type, result still unsigned" */
#pragma warning(disable:4146)
#endif
#define PNAME "LCS Application Protocol"
#define PSNAME "LCSAP"
#define PFNAME "lcsap"
void proto_register_lcsap(void);
void proto_reg_handoff_lcsap(void);
#define SCTP_PORT_LCSAP 9082
#include "packet-lcsap-val.h"
/* Initialize the protocol and registered fields */
static int proto_lcsap;
static int hf_lcsap_pos_method;
static int hf_lcsap_pos_usage;
static int hf_lcsap_gnss_pos_method;
static int hf_lcsap_gnss_id;
static int hf_lcsap_gnss_pos_usage;
#include "packet-lcsap-hf.c"
/* Initialize the subtree pointers */
static int ett_lcsap;
static int ett_lcsap_plmnd_id;
static int ett_lcsap_imsi;
static int ett_lcsap_civic_address;
#include "packet-lcsap-ett.c"
static expert_field ei_lcsap_civic_data_not_xml;
/* Global variables */
static uint32_t ProcedureCode;
static uint32_t ProtocolIE_ID;
static uint32_t ProtocolExtensionID;
static uint32_t PayloadType = -1;
/* Dissector handles */
static dissector_handle_t lcsap_handle;
static dissector_handle_t lpp_handle;
static dissector_handle_t lppa_handle;
static dissector_handle_t xml_handle;
/* Dissector tables */
static dissector_table_t lcsap_ies_dissector_table;
static dissector_table_t lcsap_extension_dissector_table;
static dissector_table_t lcsap_proc_imsg_dissector_table;
static dissector_table_t lcsap_proc_sout_dissector_table;
static dissector_table_t lcsap_proc_uout_dissector_table;
static int dissect_ProtocolIEFieldValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *);
static int dissect_ProtocolExtensionFieldExtensionValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *);
static int dissect_InitiatingMessageValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *);
static int dissect_SuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *);
static int dissect_UnsuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *);
/* 7.4.13 Positioning Data
* Coding of positioning method (bits 8-4)
*/
static const value_string lcsap_pos_method_vals[] = {
{ 0x00, "Cell ID" },
{ 0x01, "Reserved" },
{ 0x02, "E-CID" },
{ 0x03, "Reserved" },
{ 0x04, "OTDOA" },
{ 0x05, "Reserved" },
{ 0x06, "Reserved" },
{ 0x07, "Reserved" },
{ 0x08, "U-TDOA" },
{ 0x09, "Reserved" },
{ 0x0a, "Reserved" },
{ 0x0b, "Reserved" },
{ 0x0c, "Reserved for other location technologies" },
{ 0x0d, "Reserved for other location technologies" },
{ 0x0e, "Reserved for other location technologies" },
{ 0x0f, "Reserved for other location technologies" },
{ 0x10, "Reserved for network specific positioning methods" },
{ 0x11, "Reserved for network specific positioning methods" },
{ 0x12, "Reserved for network specific positioning methods" },
{ 0x13, "Reserved for network specific positioning methods" },
{ 0x14, "Reserved for network specific positioning methods" },
{ 0x15, "Reserved for network specific positioning methods" },
{ 0x16, "Reserved for network specific positioning methods" },
{ 0x17, "Reserved for network specific positioning methods" },
{ 0x18, "Reserved for network specific positioning methods" },
{ 0x19, "Reserved for network specific positioning methods" },
{ 0x1a, "Reserved for network specific positioning methods" },
{ 0x1b, "Reserved for network specific positioning methods" },
{ 0x1c, "Reserved for network specific positioning methods" },
{ 0x1d, "Reserved for network specific positioning methods" },
{ 0x1e, "Reserved for network specific positioning methods" },
{ 0x1f, "Reserved for network specific positioning methods" },
{ 0, NULL }
};
/* Coding of usage (bits 3-1)*/
static const value_string lcsap_pos_usage_vals[] = {
{ 0x00, "Attempted unsuccessfully due to failure or interruption - not used" },
{ 0x01, "Attempted successfully: results not used to generate location - not used." },
{ 0x02, "Attempted successfully: results used to verify but not generate location - not used." },
{ 0x03, "Attempted successfully: results used to generate location" },
{ 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." },
{ 0x05, "Reserved" },
{ 0x06, "Reserved" },
{ 0x07, "Reserved" },
{ 0, NULL }
};
/* Coding of Method (Bits 8-7) */
static const value_string lcsap_gnss_pos_method_vals[] = {
{ 0x00, "UE-Based" },
{ 0x01, "UE-Assisted" },
{ 0x02, "Conventional" },
{ 0x03, "Reserved" },
{ 0, NULL }
};
/* Coding of GNSS ID (Bits 6-4) */
static const value_string lcsap_gnss_id_vals[] = {
{ 0x00, "GPS" },
{ 0x01, "Galileo" },
{ 0x02, "SBAS" },
{ 0x03, "Modernized GPS" },
{ 0x04, "QZSS" },
{ 0x05, "GLONASS" },
{ 0x06, "Reserved" },
{ 0x07, "Reserved" },
{ 0, NULL }
};
/* Coding of usage (bits 3- 1) */
static const value_string lcsap_gnss_pos_usage_vals[] = {
{ 0x00, "Attempted unsuccessfully due to failure or interruption" },
{ 0x01, "Attempted successfully: results not used to generate location" },
{ 0x02, "Attempted successfully: results used to verify but not generate location" },
{ 0x03, "Attempted successfully: results used to generate location" },
{ 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." },
{ 0x05, "Reserved" },
{ 0x06, "Reserved" },
{ 0x07, "Reserved" },
{ 0, NULL }
};
#include "packet-lcsap-fn.c"
static int dissect_ProtocolIEFieldValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
return (dissector_try_uint(lcsap_ies_dissector_table, ProtocolIE_ID, tvb, pinfo, tree)) ? tvb_captured_length(tvb) : 0;
}
static int dissect_ProtocolExtensionFieldExtensionValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
return (dissector_try_uint(lcsap_extension_dissector_table, ProtocolExtensionID, tvb, pinfo, tree)) ? tvb_captured_length(tvb) : 0;
}
static int dissect_InitiatingMessageValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
return (dissector_try_uint(lcsap_proc_imsg_dissector_table, ProcedureCode, tvb, pinfo, tree)) ? tvb_captured_length(tvb) : 0;
}
static int dissect_SuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
return (dissector_try_uint(lcsap_proc_sout_dissector_table, ProcedureCode, tvb, pinfo, tree)) ? tvb_captured_length(tvb) : 0;
}
static int dissect_UnsuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
return (dissector_try_uint(lcsap_proc_uout_dissector_table, ProcedureCode, tvb, pinfo, tree)) ? tvb_captured_length(tvb) : 0;
}
static int
dissect_lcsap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
proto_item *lcsap_item = NULL;
proto_tree *lcsap_tree = NULL;
/* make entry in the Protocol column on summary display */
col_set_str(pinfo->cinfo, COL_PROTOCOL, "LCSAP");
/* create the lcsap protocol tree */
lcsap_item = proto_tree_add_item(tree, proto_lcsap, tvb, 0, -1, ENC_NA);
lcsap_tree = proto_item_add_subtree(lcsap_item, ett_lcsap);
dissect_LCS_AP_PDU_PDU(tvb, pinfo, lcsap_tree, NULL);
return tvb_captured_length(tvb);
}
/*--- proto_reg_handoff_lcsap ---------------------------------------*/
void
proto_reg_handoff_lcsap(void)
{
lpp_handle = find_dissector_add_dependency("lpp", proto_lcsap);
lppa_handle = find_dissector_add_dependency("lppa", proto_lcsap);
xml_handle = find_dissector_add_dependency("xml", proto_lcsap);
dissector_add_uint_with_preference("sctp.port", SCTP_PORT_LCSAP, lcsap_handle);
dissector_add_uint("sctp.ppi", LCS_AP_PAYLOAD_PROTOCOL_ID, lcsap_handle);
#include "packet-lcsap-dis-tab.c"
}
/*--- proto_register_lcsap -------------------------------------------*/
void proto_register_lcsap(void) {
/* List of fields */
static hf_register_info hf[] = {
/* 7.4.13 Positioning Data */
{ &hf_lcsap_pos_method,
{ "Positioning Method", "lcsap.pos_method",
FT_UINT8, BASE_DEC, VALS(lcsap_pos_method_vals), 0xf8,
NULL, HFILL }
},
{ &hf_lcsap_pos_usage,
{ "Positioning usage", "lcsap.pos_usage",
FT_UINT8, BASE_DEC, VALS(lcsap_pos_usage_vals), 0x07,
NULL, HFILL }
},
{ &hf_lcsap_gnss_pos_method,
{ "GNSS Positioning Method", "lcsap.gnss_pos_method",
FT_UINT8, BASE_DEC, VALS(lcsap_gnss_pos_method_vals), 0xc0,
NULL, HFILL }
},
{ &hf_lcsap_gnss_id,
{ "GNSS ID", "lcsap.gnss_id",
FT_UINT8, BASE_DEC, VALS(lcsap_gnss_id_vals), 0x38,
NULL, HFILL }
},
{ &hf_lcsap_gnss_pos_usage,
{ "GNSS Positioning usage", "lcsap.gnss_pos_usage",
FT_UINT8, BASE_DEC, VALS(lcsap_gnss_pos_usage_vals), 0x07,
NULL, HFILL }
},
#include "packet-lcsap-hfarr.c"
};
/* List of subtrees */
static int *ett[] = {
&ett_lcsap,
&ett_lcsap_plmnd_id,
&ett_lcsap_imsi,
&ett_lcsap_civic_address,
#include "packet-lcsap-ettarr.c"
};
/* module_t *lcsap_module; */
expert_module_t *expert_lcsap;
static ei_register_info ei[] = {
{ &ei_lcsap_civic_data_not_xml,
{ "lcsap.civic_data_not_xml", PI_PROTOCOL, PI_ERROR, "Should contain a UTF-8 encoded PIDF - LO XML document as defined in IETF RFC 4119", EXPFILL } },
};
/* Register protocol */
proto_lcsap = proto_register_protocol(PNAME, PSNAME, PFNAME);
/* Register fields and subtrees */
proto_register_field_array(proto_lcsap, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
lcsap_handle = register_dissector("lcsap", dissect_lcsap, proto_lcsap);
/* Register dissector tables */
lcsap_ies_dissector_table = register_dissector_table("lcsap.ies", "LCS-AP-PROTOCOL-IES", proto_lcsap, FT_UINT32, BASE_DEC);
expert_lcsap = expert_register_protocol(proto_lcsap);
expert_register_field_array(expert_lcsap, ei, array_length(ei));
lcsap_extension_dissector_table = register_dissector_table("lcsap.extension", "LCS-AP-PROTOCOL-EXTENSION", proto_lcsap, FT_UINT32, BASE_DEC);
lcsap_proc_imsg_dissector_table = register_dissector_table("lcsap.proc.imsg", "LCS-AP-ELEMENTARY-PROCEDURE InitiatingMessage", proto_lcsap, FT_UINT32, BASE_DEC);
lcsap_proc_sout_dissector_table = register_dissector_table("lcsap.proc.sout", "LCS-AP-ELEMENTARY-PROCEDURE SuccessfulOutcome", proto_lcsap, FT_UINT32, BASE_DEC);
lcsap_proc_uout_dissector_table = register_dissector_table("lcsap.proc.uout", "LCS-AP-ELEMENTARY-PROCEDURE UnsuccessfulOutcome", proto_lcsap, FT_UINT32, BASE_DEC);
/* lcsap_module = prefs_register_protocol(proto_lcsap, NULL); */
}
/*
* Editor modelines
*
* Local Variables:
* c-basic-offset: 2
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=2 tabstop=8 expandtab:
* :indentSize=2:tabSize=8:noTabs=true:
*/
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