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/* packet-lcsap.c
* Routines for LCS-AP packet dissembly.
*
* Copyright (c) 2011 by Spenser Sheng <spenser.sheng@ericsson.com>
*
* $Id: packet-lcsap.c 28770 2011-06-18 21:30:42Z stig Spenser Sheng$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1999 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
* References:
* ETSI TS 129 171 V9.2.0 (2010-10)
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <glib.h>
#include <epan/packet.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <epan/strutil.h>
#include <epan/asn1.h>
#include <epan/prefs.h>
#include <epan/sctpppids.h>
#include "packet-ber.h"
#include "packet-per.h"
#include "packet-e212.h"
#include "packet-sccp.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"
static dissector_handle_t lpp_handle;
static dissector_handle_t lppa_handle;
#define SCTP_PORT_LCSAP 9082
#include "packet-lcsap-val.h"
/* Strcture to hold ProcedureCode */
struct pro_code {
guint8 code;
} _pro_code;
/* Initialize the protocol and registered fields */
static int proto_lcsap = -1;
#include "packet-lcsap-hf.c"
/* Initialize the subtree pointers */
static int ett_lcsap = -1;
#include "packet-lcsap-ett.c"
/* Global variables */
static guint32 ProcedureCode;
static guint32 ProtocolIE_ID;
static guint32 ProtocolExtensionID;
static guint32 PayloadType = -1;
static guint gbl_lcsapSctpPort=SCTP_PORT_LCSAP;
/* 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);
static int dissect_ProtocolExtensionFieldExtensionValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
static int dissect_InitiatingMessageValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
static int dissect_SuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
static int dissect_UnsuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
#include "packet-lcsap-fn.c"
static int dissect_ProtocolIEFieldValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
return (dissector_try_uint(lcsap_ies_dissector_table, ProtocolIE_ID, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
}
static int dissect_ProtocolExtensionFieldExtensionValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
return (dissector_try_uint(lcsap_extension_dissector_table, ProtocolExtensionID, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
}
static int dissect_InitiatingMessageValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
return (dissector_try_uint(lcsap_proc_imsg_dissector_table, ProcedureCode, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
}
static int dissect_SuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
return (dissector_try_uint(lcsap_proc_sout_dissector_table, ProcedureCode, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
}
static int dissect_UnsuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
return (dissector_try_uint(lcsap_proc_uout_dissector_table, ProcedureCode, tvb, pinfo, tree)) ? tvb_length(tvb) : 0;
}
static void
dissect_lcsap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_item *lcsap_item = NULL;
proto_tree *lcsap_tree = NULL;
/* make entry in the Protocol column on summary display */
if (check_col(pinfo->cinfo, COL_PROTOCOL))
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);
}
/*--- proto_reg_handoff_lcsap ---------------------------------------*/
void
proto_reg_handoff_lcsap(void)
{
static gboolean Initialized=FALSE;
static dissector_handle_t lcsap_handle;
static guint SctpPort;
if (!Initialized) {
lcsap_handle = find_dissector("lcsap");
lpp_handle = find_dissector("lpp");
lppa_handle = find_dissector("lppa");
dissector_add_handle("sctp.port", lcsap_handle); /* for "decode-as" */
dissector_add_uint("sctp.ppi", LCS_AP_PAYLOAD_PROTOCOL_ID, lcsap_handle);
Initialized=TRUE;
#include "packet-lcsap-dis-tab.c"
} else {
if (SctpPort != 0) {
dissector_delete_uint("sctp.port", SctpPort, lcsap_handle);
}
}
SctpPort=gbl_lcsapSctpPort;
if (SctpPort != 0) {
dissector_add_uint("sctp.port", SctpPort, lcsap_handle);
}
}
/*--- proto_register_lcsap -------------------------------------------*/
void proto_register_lcsap(void) {
/* List of fields */
static hf_register_info hf[] = {
#include "packet-lcsap-hfarr.c"
};
/* List of subtrees */
static gint *ett[] = {
&ett_lcsap,
#include "packet-lcsap-ettarr.c"
};
module_t *lcsap_module;
/* 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));
register_dissector("lcsap", dissect_lcsap, proto_lcsap);
/* Register dissector tables */
lcsap_ies_dissector_table = register_dissector_table("lcsap.ies", "LCS-AP-PROTOCOL-IES", FT_UINT32, BASE_DEC);
lcsap_extension_dissector_table = register_dissector_table("lcsap.extension", "LCS-AP-PROTOCOL-EXTENSION", FT_UINT32, BASE_DEC);
lcsap_proc_imsg_dissector_table = register_dissector_table("lcsap.proc.imsg", "LCS-AP-ELEMENTARY-PROCEDURE InitiatingMessage", FT_UINT32, BASE_DEC);
lcsap_proc_sout_dissector_table = register_dissector_table("lcsap.proc.sout", "LCS-AP-ELEMENTARY-PROCEDURE SuccessfulOutcome", FT_UINT32, BASE_DEC);
lcsap_proc_uout_dissector_table = register_dissector_table("lcsap.proc.uout", "LCS-AP-ELEMENTARY-PROCEDURE UnsuccessfulOutcome", FT_UINT32, BASE_DEC);
/* Register configuration options for ports */
lcsap_module = prefs_register_protocol(proto_lcsap, proto_reg_handoff_lcsap);
prefs_register_uint_preference(lcsap_module, "sctp.port",
"LCSAP SCTP Port",
"Set the SCTP port for LCSAP messages",
10,
&gbl_lcsapSctpPort);
}
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