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/* packet-bicc_mst.c
* (Incomplete) Dissector for the 3GPP TS 29.205 BICC MST (Mobile Service Transport)
*
* This currently only dissects a single MST IE, which is required by the BSSMAP
* dissector in order to decode the LCLS (Local Call Local Switch)
* GCR (Global Call Reference)
*
* Copyright 2019 by Harald Welte <laforge@gnumonks.org>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/tap.h>
#include <epan/expert.h>
#include "packet-bicc_mst.h"
void proto_register_bicc_mst(void);
static int proto_bicc_mst;
static int hf_lcls_gcr_network_id_len;
static int hf_lcls_gcr_network_id;
static int hf_lcls_gcr_node_id_len;
static int hf_lcls_gcr_node_id;
static int hf_lcls_gcr_call_ref_id_len;
static int hf_lcls_gcr_call_ref_id;
static int ett_lcls_gcr;
unsigned
dissect_bicc_mst_lcls_gcr(tvbuff_t *tvb, proto_tree *tree, uint32_t offset, unsigned len)
{
unsigned net_id_len, node_id_len, call_ref_id_len;
uint32_t curr_offset = offset;
proto_tree *subtree;
proto_item *ti;
ti = proto_tree_add_protocol_format(tree, proto_bicc_mst, tvb, offset, len, "BICC MST GCR");
subtree = proto_item_add_subtree(ti, ett_lcls_gcr);
proto_tree_add_item_ret_uint(subtree, hf_lcls_gcr_network_id_len, tvb, curr_offset++, 1, ENC_NA, &net_id_len);
proto_tree_add_item(subtree, hf_lcls_gcr_network_id, tvb, curr_offset, net_id_len, ENC_NA);
curr_offset += net_id_len;
proto_tree_add_item_ret_uint(subtree, hf_lcls_gcr_node_id_len, tvb, curr_offset++, 1, ENC_NA, &node_id_len);
proto_tree_add_item(subtree, hf_lcls_gcr_node_id, tvb, curr_offset, node_id_len, ENC_NA);
curr_offset += node_id_len;
proto_tree_add_item_ret_uint(subtree, hf_lcls_gcr_call_ref_id_len, tvb, curr_offset++, 1, ENC_NA, &call_ref_id_len);
proto_tree_add_item(subtree, hf_lcls_gcr_call_ref_id, tvb, curr_offset, call_ref_id_len, ENC_NA);
curr_offset += call_ref_id_len;
return curr_offset - offset;
}
void
proto_register_bicc_mst(void)
{
static hf_register_info hf[] = {
{ &hf_lcls_gcr_network_id_len, { "Length of LCLS GCR Network ID",
"bicc_mst.lcls_gcr.network_id_len", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lcls_gcr_network_id, { "LCLS GCR Network ID",
"bicc_mst.lcls_gcr.network_id", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_lcls_gcr_node_id_len, { "Length of LCLS GCR Node ID",
"bicc_mst.lcls_gcr.node_id_len", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lcls_gcr_node_id, { "LCLS GCR Network ID",
"bicc_mst.lcls_gcr.network_id", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_lcls_gcr_call_ref_id_len, { "Length of LCLS GCR Call Ref ID",
"bicc_mst.lcls_gcr.call_ref_id_len", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_lcls_gcr_call_ref_id, { "LCLS GCR Call Ref ID",
"bicc_mst.lcls_gcr.call_ref_id", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
};
static int *ett[] = {
&ett_lcls_gcr,
};
proto_bicc_mst = proto_register_protocol("3GPP BICC MST", "BICC-MST", "bicc_mst");
proto_register_field_array(proto_bicc_mst, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 8
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
* :indentSize=8:tabSize=8:noTabs=false:
*/
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