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/* packet-lppa.c
* Routines for 3GPP LTE Positioning Protocol A (LLPa) packet dissection
* Copyright 2011-2024, Pascal Quantin <pascal@wireshark.org>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*
* Ref 3GPP TS 36.455 version 18.1.0 (2024-06)
* http://www.3gpp.org
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/proto_data.h>
#include <epan/asn1.h>
#include <wsutil/array.h>
#include "packet-per.h"
#include "packet-lppa.h"
#define PNAME "LTE Positioning Protocol A (LPPa)"
#define PSNAME "LPPa"
#define PFNAME "lppa"
void proto_register_lppa(void);
void proto_reg_handoff_lppa(void);
/* Initialize the protocol and registered fields */
static int proto_lppa;
#include "packet-lppa-hf.c"
/* Initialize the subtree pointers */
static int ett_lppa;
#include "packet-lppa-ett.c"
enum {
INITIATING_MESSAGE,
SUCCESSFUL_OUTCOME,
UNSUCCESSFUL_OUTCOME
};
/* Dissector tables */
static dissector_table_t lppa_ies_dissector_table;
static dissector_table_t lppa_extension_dissector_table;
static dissector_table_t lppa_proc_imsg_dissector_table;
static dissector_table_t lppa_proc_sout_dissector_table;
static dissector_table_t lppa_proc_uout_dissector_table;
/* Include constants */
#include "packet-lppa-val.h"
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 *);
struct lppa_private_data {
uint32_t procedure_code;
uint32_t protocol_ie_id;
uint32_t protocol_extension_id;
uint32_t message_type;
};
static struct lppa_private_data*
lppa_get_private_data(packet_info* pinfo)
{
struct lppa_private_data* lppa_data = (struct lppa_private_data*)p_get_proto_data(pinfo->pool, pinfo, proto_lppa, 0);
if (!lppa_data) {
lppa_data = wmem_new0(pinfo->pool, struct lppa_private_data);
p_add_proto_data(pinfo->pool, pinfo, proto_lppa, 0, lppa_data);
}
return lppa_data;
}
#include "packet-lppa-fn.c"
static int dissect_ProtocolIEFieldValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
lppa_ctx_t lppa_ctx;
struct lppa_private_data* lppa_data = lppa_get_private_data(pinfo);
lppa_ctx.message_type = lppa_data->message_type;
lppa_ctx.ProcedureCode = lppa_data->procedure_code;
lppa_ctx.ProtocolIE_ID = lppa_data->protocol_ie_id;
lppa_ctx.ProtocolExtensionID = lppa_data->protocol_extension_id;
return (dissector_try_uint_new(lppa_ies_dissector_table, lppa_ctx.ProtocolIE_ID, tvb, pinfo, tree, false, &lppa_ctx)) ? tvb_captured_length(tvb) : 0;
}
static int dissect_ProtocolExtensionFieldExtensionValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
lppa_ctx_t lppa_ctx;
struct lppa_private_data* lppa_data = lppa_get_private_data(pinfo);
lppa_ctx.message_type = lppa_data->message_type;
lppa_ctx.ProcedureCode = lppa_data->procedure_code;
lppa_ctx.ProtocolIE_ID = lppa_data->protocol_ie_id;
lppa_ctx.ProtocolExtensionID = lppa_data->protocol_extension_id;
return (dissector_try_uint_new(lppa_extension_dissector_table, lppa_ctx.ProtocolExtensionID, tvb, pinfo, tree, false, &lppa_ctx)) ? tvb_captured_length(tvb) : 0;
}
static int dissect_InitiatingMessageValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
{
struct lppa_private_data* lppa_data = lppa_get_private_data(pinfo);
return (dissector_try_uint_new(lppa_proc_imsg_dissector_table, lppa_data->procedure_code, tvb, pinfo, tree, false, data)) ? tvb_captured_length(tvb) : 0;
}
static int dissect_SuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
{
struct lppa_private_data* lppa_data = lppa_get_private_data(pinfo);
return (dissector_try_uint_new(lppa_proc_sout_dissector_table, lppa_data->procedure_code, tvb, pinfo, tree, false, data)) ? tvb_captured_length(tvb) : 0;
}
static int dissect_UnsuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
{
struct lppa_private_data* lppa_data = lppa_get_private_data(pinfo);
return (dissector_try_uint_new(lppa_proc_uout_dissector_table, lppa_data->procedure_code, tvb, pinfo, tree, false, data)) ? tvb_captured_length(tvb) : 0;
}
/*--- proto_register_lppa -------------------------------------------*/
void proto_register_lppa(void) {
/* List of fields */
static hf_register_info hf[] = {
#include "packet-lppa-hfarr.c"
};
/* List of subtrees */
static int* ett[] = {
&ett_lppa,
#include "packet-lppa-ettarr.c"
};
/* Register protocol */
proto_lppa = proto_register_protocol(PNAME, PSNAME, PFNAME);
register_dissector("lppa", dissect_LPPA_PDU_PDU, proto_lppa);
/* Register fields and subtrees */
proto_register_field_array(proto_lppa, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
/* Register dissector tables */
lppa_ies_dissector_table = register_dissector_table("lppa.ies", "LPPA-PROTOCOL-IES", proto_lppa, FT_UINT32, BASE_DEC);
lppa_extension_dissector_table = register_dissector_table("lppa.extension", "LPPA-PROTOCOL-EXTENSION", proto_lppa, FT_UINT32, BASE_DEC);
lppa_proc_imsg_dissector_table = register_dissector_table("lppa.proc.imsg", "LPPA-ELEMENTARY-PROCEDURE InitiatingMessage", proto_lppa, FT_UINT32, BASE_DEC);
lppa_proc_sout_dissector_table = register_dissector_table("lppa.proc.sout", "LPPA-ELEMENTARY-PROCEDURE SuccessfulOutcome", proto_lppa, FT_UINT32, BASE_DEC);
lppa_proc_uout_dissector_table = register_dissector_table("lppa.proc.uout", "LPPA-ELEMENTARY-PROCEDURE UnsuccessfulOutcome", proto_lppa, FT_UINT32, BASE_DEC);
}
/*--- proto_reg_handoff_lppa ---------------------------------------*/
void
proto_reg_handoff_lppa(void)
{
#include "packet-lppa-dis-tab.c"
}
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