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/* packet-s1ap.c
* Routines for E-UTRAN S1 Application Protocol (S1AP) packet dissection
* Copyright 2007-2010, Anders Broman <anders.broman@ericsson.com>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 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.
*
* Based on the RANAP dissector
*
* References: 3GPP TS 36.413 V9.2.0 (2010-03)
*/
#include "config.h"
#include <epan/packet.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"
#include "packet-lte-rrc.h"
#include "packet-ranap.h"
#include "packet-bssgp.h"
#include "packet-s1ap.h"
#include "packet-a21.h"
#ifdef _MSC_VER
/* disable: "warning C4146: unary minus operator applied to unsigned type, result still unsigned" */
#pragma warning(disable:4146)
#endif
#define PNAME "S1 Application Protocol"
#define PSNAME "S1AP"
#define PFNAME "s1ap"
/* Dissector will use SCTP PPID 18 or SCTP port. IANA assigned port = 36412 */
#define SCTP_PORT_S1AP 36412
void proto_register_s1ap(void);
void proto_reg_handoff_s1ap(void);
static dissector_handle_t nas_eps_handle;
static dissector_handle_t lppa_handle;
static dissector_handle_t bssgp_handle;
#include "packet-s1ap-val.h"
/* Initialize the protocol and registered fields */
static int proto_s1ap = -1;
static int hf_s1ap_transportLayerAddressIPv4 = -1;
static int hf_s1ap_transportLayerAddressIPv6 = -1;
#include "packet-s1ap-hf.c"
/* Initialize the subtree pointers */
static int ett_s1ap = -1;
static int ett_s1ap_TransportLayerAddress = -1;
static int ett_s1ap_ToTargetTransparentContainer = -1;
static int ett_s1ap_ToSourceTransparentContainer = -1;
static int ett_s1ap_RRCContainer = -1;
static int ett_s1ap_UERadioCapability = -1;
static int ett_s1ap_RIMInformation = -1;
static int ett_s1ap_Cdma2000PDU = -1;
static int ett_s1ap_Cdma2000SectorID = -1;
#include "packet-s1ap-ett.c"
enum{
INITIATING_MESSAGE,
SUCCESSFUL_OUTCOME,
UNSUCCESSFUL_OUTCOME
};
/* Global variables */
static guint32 ProcedureCode;
static guint32 ProtocolIE_ID;
static guint32 ProtocolExtensionID;
static guint gbl_s1apSctpPort=SCTP_PORT_S1AP;
static guint32 handover_type_value;
static guint32 message_type;
static gboolean g_s1ap_dissect_container = TRUE;
static const char *obj_id = NULL;
static dissector_handle_t gcsna_handle = NULL;
/* Dissector tables */
static dissector_table_t s1ap_ies_dissector_table;
static dissector_table_t s1ap_ies_p1_dissector_table;
static dissector_table_t s1ap_ies_p2_dissector_table;
static dissector_table_t s1ap_extension_dissector_table;
static dissector_table_t s1ap_proc_imsg_dissector_table;
static dissector_table_t s1ap_proc_sout_dissector_table;
static dissector_table_t s1ap_proc_uout_dissector_table;
static int dissect_ProtocolIEFieldValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *);
/* Currently not used
static int dissect_ProtocolIEFieldPairFirstValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
static int dissect_ProtocolIEFieldPairSecondValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
*/
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 *);
static int dissect_SourceeNB_ToTargeteNB_TransparentContainer_PDU(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *);
static int dissect_TargeteNB_ToSourceeNB_TransparentContainer_PDU(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *);
#if 0
static int dissect_SourceRNC_ToTargetRNC_TransparentContainer_PDU(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
static int dissect_TargetRNC_ToSourceRNC_TransparentContainer_PDU(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
static int dissect_SourceBSS_ToTargetBSS_TransparentContainer_PDU(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
static int dissect_TargetBSS_ToSourceBSS_TransparentContainer_PDU(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
#endif
#include "packet-s1ap-fn.c"
static int dissect_ProtocolIEFieldValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
s1ap_ctx_t s1ap_ctx;
s1ap_ctx.message_type = message_type;
s1ap_ctx.ProcedureCode = ProcedureCode;
s1ap_ctx.ProtocolIE_ID = ProtocolIE_ID;
s1ap_ctx.ProtocolExtensionID = ProtocolExtensionID;
return (dissector_try_uint_new(s1ap_ies_dissector_table, ProtocolIE_ID, tvb, pinfo, tree, TRUE, &s1ap_ctx)) ? tvb_captured_length(tvb) : 0;
}
/* Currently not used
static int dissect_ProtocolIEFieldPairFirstValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
return (dissector_try_uint(s1ap_ies_p1_dissector_table, ProtocolIE_ID, tvb, pinfo, tree)) ? tvb_captured_length(tvb) : 0;
}
static int dissect_ProtocolIEFieldPairSecondValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
return (dissector_try_uint(s1ap_ies_p2_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_)
{
s1ap_ctx_t s1ap_ctx;
s1ap_ctx.message_type = message_type;
s1ap_ctx.ProcedureCode = ProcedureCode;
s1ap_ctx.ProtocolIE_ID = ProtocolIE_ID;
s1ap_ctx.ProtocolExtensionID = ProtocolExtensionID;
return (dissector_try_uint_new(s1ap_extension_dissector_table, ProtocolExtensionID, tvb, pinfo, tree, TRUE, &s1ap_ctx)) ? tvb_captured_length(tvb) : 0;
}
static int dissect_InitiatingMessageValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
{
return (dissector_try_uint_new(s1ap_proc_imsg_dissector_table, ProcedureCode, tvb, pinfo, tree, TRUE, data)) ? tvb_captured_length(tvb) : 0;
}
static int dissect_SuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
{
return (dissector_try_uint_new(s1ap_proc_sout_dissector_table, ProcedureCode, tvb, pinfo, tree, TRUE, data)) ? tvb_captured_length(tvb) : 0;
}
static int dissect_UnsuccessfulOutcomeValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
{
return (dissector_try_uint_new(s1ap_proc_uout_dissector_table, ProcedureCode, tvb, pinfo, tree, TRUE, data)) ? tvb_captured_length(tvb) : 0;
}
static int
dissect_s1ap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
proto_item *s1ap_item = NULL;
proto_tree *s1ap_tree = NULL;
/* make entry in the Protocol column on summary display */
col_set_str(pinfo->cinfo, COL_PROTOCOL, "S1AP");
/* create the s1ap protocol tree */
s1ap_item = proto_tree_add_item(tree, proto_s1ap, tvb, 0, -1, ENC_NA);
s1ap_tree = proto_item_add_subtree(s1ap_item, ett_s1ap);
dissect_S1AP_PDU_PDU(tvb, pinfo, s1ap_tree, NULL);
return tvb_captured_length(tvb);
}
/*--- proto_reg_handoff_s1ap ---------------------------------------*/
void
proto_reg_handoff_s1ap(void)
{
static gboolean Initialized=FALSE;
static dissector_handle_t s1ap_handle;
static guint SctpPort;
s1ap_handle = find_dissector("s1ap");
gcsna_handle = find_dissector("gcsna");
if (!Initialized) {
nas_eps_handle = find_dissector("nas-eps");
lppa_handle = find_dissector("lppa");
bssgp_handle = find_dissector("bssgp");
dissector_add_for_decode_as("sctp.port", s1ap_handle);
dissector_add_uint("sctp.ppi", S1AP_PAYLOAD_PROTOCOL_ID, s1ap_handle);
Initialized=TRUE;
#include "packet-s1ap-dis-tab.c"
} else {
if (SctpPort != 0) {
dissector_delete_uint("sctp.port", SctpPort, s1ap_handle);
}
}
SctpPort=gbl_s1apSctpPort;
if (SctpPort != 0) {
dissector_add_uint("sctp.port", SctpPort, s1ap_handle);
}
}
/*--- proto_register_s1ap -------------------------------------------*/
void proto_register_s1ap(void) {
/* List of fields */
static hf_register_info hf[] = {
{ &hf_s1ap_transportLayerAddressIPv4,
{ "transportLayerAddress(IPv4)", "s1ap.transportLayerAddressIPv4",
FT_IPv4, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_s1ap_transportLayerAddressIPv6,
{ "transportLayerAddress(IPv6)", "s1ap.transportLayerAddressIPv6",
FT_IPv6, BASE_NONE, NULL, 0,
NULL, HFILL }},
#include "packet-s1ap-hfarr.c"
};
/* List of subtrees */
static gint *ett[] = {
&ett_s1ap,
&ett_s1ap_TransportLayerAddress,
&ett_s1ap_ToTargetTransparentContainer,
&ett_s1ap_ToSourceTransparentContainer,
&ett_s1ap_RRCContainer,
&ett_s1ap_UERadioCapability,
&ett_s1ap_RIMInformation,
&ett_s1ap_Cdma2000PDU,
&ett_s1ap_Cdma2000SectorID,
#include "packet-s1ap-ettarr.c"
};
module_t *s1ap_module;
/* Register protocol */
proto_s1ap = proto_register_protocol(PNAME, PSNAME, PFNAME);
/* Register fields and subtrees */
proto_register_field_array(proto_s1ap, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
/* Register dissector */
register_dissector("s1ap", dissect_s1ap, proto_s1ap);
/* Register dissector tables */
s1ap_ies_dissector_table = register_dissector_table("s1ap.ies", "S1AP-PROTOCOL-IES", proto_s1ap, FT_UINT32, BASE_DEC, DISSECTOR_TABLE_ALLOW_DUPLICATE);
s1ap_ies_p1_dissector_table = register_dissector_table("s1ap.ies.pair.first", "S1AP-PROTOCOL-IES-PAIR FirstValue", proto_s1ap, FT_UINT32, BASE_DEC, DISSECTOR_TABLE_ALLOW_DUPLICATE);
s1ap_ies_p2_dissector_table = register_dissector_table("s1ap.ies.pair.second", "S1AP-PROTOCOL-IES-PAIR SecondValue", proto_s1ap, FT_UINT32, BASE_DEC, DISSECTOR_TABLE_ALLOW_DUPLICATE);
s1ap_extension_dissector_table = register_dissector_table("s1ap.extension", "S1AP-PROTOCOL-EXTENSION", proto_s1ap, FT_UINT32, BASE_DEC, DISSECTOR_TABLE_ALLOW_DUPLICATE);
s1ap_proc_imsg_dissector_table = register_dissector_table("s1ap.proc.imsg", "S1AP-ELEMENTARY-PROCEDURE InitiatingMessage", proto_s1ap, FT_UINT32, BASE_DEC, DISSECTOR_TABLE_ALLOW_DUPLICATE);
s1ap_proc_sout_dissector_table = register_dissector_table("s1ap.proc.sout", "S1AP-ELEMENTARY-PROCEDURE SuccessfulOutcome", proto_s1ap, FT_UINT32, BASE_DEC, DISSECTOR_TABLE_ALLOW_DUPLICATE);
s1ap_proc_uout_dissector_table = register_dissector_table("s1ap.proc.uout", "S1AP-ELEMENTARY-PROCEDURE UnsuccessfulOutcome", proto_s1ap, FT_UINT32, BASE_DEC, DISSECTOR_TABLE_ALLOW_DUPLICATE);
/* Register configuration options for ports */
s1ap_module = prefs_register_protocol(proto_s1ap, proto_reg_handoff_s1ap);
prefs_register_uint_preference(s1ap_module, "sctp.port",
"S1AP SCTP Port",
"Set the SCTP port for S1AP messages",
10,
&gbl_s1apSctpPort);
prefs_register_bool_preference(s1ap_module, "dissect_container", "Dissect TransparentContainer", "Dissect TransparentContainers that are opaque to S1AP", &g_s1ap_dissect_container);
}
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