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/* packet-e1ap.c
* Routines for E-UTRAN E1 Application Protocol (E1AP) packet dissection
* Copyright 2018-2019, Pascal Quantin <pascal.quantin@gmail.com>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*
* References: 3GPP TS 38.463 V15.2.0 (2018-12)
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/asn1.h>
#include <epan/sctpppids.h>
#include <epan/proto_data.h>
#include "packet-per.h"
#include "packet-e212.h"
#include "packet-ntp.h"
#define PNAME "E1 Application Protocol"
#define PSNAME "E1AP"
#define PFNAME "e1ap"
#define SCTP_PORT_E1AP 38462
void proto_register_e1ap(void);
void proto_reg_handoff_e1ap(void);
#include "packet-e1ap-val.h"
/* Initialize the protocol and registered fields */
static int proto_e1ap = -1;
static int hf_e1ap_transportLayerAddressIPv4 = -1;
static int hf_e1ap_transportLayerAddressIPv6 = -1;
#include "packet-e1ap-hf.c"
/* Initialize the subtree pointers */
static gint ett_e1ap = -1;
static gint ett_e1ap_PLMN_Identity = -1;
static gint ett_e1ap_TransportLayerAddress = -1;
#include "packet-e1ap-ett.c"
enum{
INITIATING_MESSAGE,
SUCCESSFUL_OUTCOME,
UNSUCCESSFUL_OUTCOME
};
typedef struct {
guint32 message_type;
guint32 procedure_code;
guint32 protocol_ie_id;
guint32 protocol_extension_id;
const char *obj_id;
} e1ap_private_data_t;
typedef struct {
guint32 message_type;
guint32 ProcedureCode;
guint32 ProtocolIE_ID;
guint32 ProtocolExtensionID;
} e1ap_ctx_t;
/* Global variables */
static dissector_handle_t e1ap_handle;
/* Dissector tables */
static dissector_table_t e1ap_ies_dissector_table;
static dissector_table_t e1ap_extension_dissector_table;
static dissector_table_t e1ap_proc_imsg_dissector_table;
static dissector_table_t e1ap_proc_sout_dissector_table;
static dissector_table_t e1ap_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 *);
static void
e1ap_MaxPacketLossRate_fmt(gchar *s, guint32 v)
{
g_snprintf(s, ITEM_LABEL_LENGTH, "%.1f%% (%u)", (float)v/10, v);
}
static void
e1ap_PacketDelayBudget_fmt(gchar *s, guint32 v)
{
g_snprintf(s, ITEM_LABEL_LENGTH, "%.1fms (%u)", (float)v/2, v);
}
static e1ap_private_data_t*
e1ap_get_private_data(packet_info *pinfo)
{
e1ap_private_data_t *e1ap_data = (e1ap_private_data_t*)p_get_proto_data(pinfo->pool, pinfo, proto_e1ap, 0);
if (!e1ap_data) {
e1ap_data = wmem_new0(pinfo->pool, e1ap_private_data_t);
p_add_proto_data(pinfo->pool, pinfo, proto_e1ap, 0, e1ap_data);
}
return e1ap_data;
}
#include "packet-e1ap-fn.c"
static int dissect_ProtocolIEFieldValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
e1ap_ctx_t e1ap_ctx;
e1ap_private_data_t *e1ap_data = e1ap_get_private_data(pinfo);
e1ap_ctx.message_type = e1ap_data->message_type;
e1ap_ctx.ProcedureCode = e1ap_data->procedure_code;
e1ap_ctx.ProtocolIE_ID = e1ap_data->protocol_ie_id;
e1ap_ctx.ProtocolExtensionID = e1ap_data->protocol_extension_id;
return (dissector_try_uint_new(e1ap_ies_dissector_table, e1ap_data->protocol_ie_id, tvb, pinfo, tree, FALSE, &e1ap_ctx)) ? tvb_captured_length(tvb) : 0;
}
//static int dissect_ProtocolExtensionFieldExtensionValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
//{
// e1ap_ctx_t e1ap_ctx;
// e1ap_private_data_t *e1ap_data = e1ap_get_private_data(pinfo);
//
// e1ap_ctx.message_type = e1ap_data->message_type;
// e1ap_ctx.ProcedureCode = e1ap_data->procedure_code;
// e1ap_ctx.ProtocolIE_ID = e1ap_data->protocol_ie_id;
// e1ap_ctx.ProtocolExtensionID = e1ap_data->protocol_extension_id;
//
// return (dissector_try_uint_new(e1ap_extension_dissector_table, e1ap_data->protocol_extension_id, tvb, pinfo, tree, FALSE, &e1ap_ctx)) ? tvb_captured_length(tvb) : 0;
//}
static int dissect_InitiatingMessageValue(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
{
e1ap_private_data_t *e1ap_data = e1ap_get_private_data(pinfo);
return (dissector_try_uint_new(e1ap_proc_imsg_dissector_table, e1ap_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)
{
e1ap_private_data_t *e1ap_data = e1ap_get_private_data(pinfo);
return (dissector_try_uint_new(e1ap_proc_sout_dissector_table, e1ap_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)
{
e1ap_private_data_t *e1ap_data = e1ap_get_private_data(pinfo);
return (dissector_try_uint_new(e1ap_proc_uout_dissector_table, e1ap_data->procedure_code, tvb, pinfo, tree, FALSE, data)) ? tvb_captured_length(tvb) : 0;
}
static int
dissect_e1ap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
proto_item *e1ap_item = NULL;
proto_tree *e1ap_tree = NULL;
/* make entry in the Protocol column on summary display */
col_set_str(pinfo->cinfo, COL_PROTOCOL, "E1AP");
col_clear(pinfo->cinfo, COL_INFO);
/* create the e1ap protocol tree */
e1ap_item = proto_tree_add_item(tree, proto_e1ap, tvb, 0, -1, ENC_NA);
e1ap_tree = proto_item_add_subtree(e1ap_item, ett_e1ap);
dissect_E1AP_PDU_PDU(tvb, pinfo, e1ap_tree, NULL);
return tvb_captured_length(tvb);
}
void proto_register_e1ap(void) {
/* List of fields */
static hf_register_info hf[] = {
{ &hf_e1ap_transportLayerAddressIPv4,
{ "IPv4 transportLayerAddress", "e1ap.transportLayerAddressIPv4",
FT_IPv4, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_e1ap_transportLayerAddressIPv6,
{ "IPv6 transportLayerAddress", "e1ap.transportLayerAddressIPv6",
FT_IPv6, BASE_NONE, NULL, 0,
NULL, HFILL }},
#include "packet-e1ap-hfarr.c"
};
/* List of subtrees */
static gint *ett[] = {
&ett_e1ap,
&ett_e1ap_PLMN_Identity,
&ett_e1ap_TransportLayerAddress,
#include "packet-e1ap-ettarr.c"
};
/* Register protocol */
proto_e1ap = proto_register_protocol(PNAME, PSNAME, PFNAME);
/* Register fields and subtrees */
proto_register_field_array(proto_e1ap, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
/* Register dissector */
e1ap_handle = register_dissector("e1ap", dissect_e1ap, proto_e1ap);
/* Register dissector tables */
e1ap_ies_dissector_table = register_dissector_table("e1ap.ies", "E1AP-PROTOCOL-IES", proto_e1ap, FT_UINT32, BASE_DEC);
e1ap_extension_dissector_table = register_dissector_table("e1ap.extension", "E1AP-PROTOCOL-EXTENSION", proto_e1ap, FT_UINT32, BASE_DEC);
e1ap_proc_imsg_dissector_table = register_dissector_table("e1ap.proc.imsg", "E1AP-ELEMENTARY-PROCEDURE InitiatingMessage", proto_e1ap, FT_UINT32, BASE_DEC);
e1ap_proc_sout_dissector_table = register_dissector_table("e1ap.proc.sout", "E1AP-ELEMENTARY-PROCEDURE SuccessfulOutcome", proto_e1ap, FT_UINT32, BASE_DEC);
e1ap_proc_uout_dissector_table = register_dissector_table("e1ap.proc.uout", "E1AP-ELEMENTARY-PROCEDURE UnsuccessfulOutcome", proto_e1ap, FT_UINT32, BASE_DEC);
}
void
proto_reg_handoff_e1ap(void)
{
dissector_add_uint_with_preference("sctp.port", SCTP_PORT_E1AP, e1ap_handle);
dissector_add_uint("sctp.ppi", E1AP_PROTOCOL_ID, e1ap_handle);
#include "packet-e1ap-dis-tab.c"
}
/*
* 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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