103 lines
3.5 KiB
C
103 lines
3.5 KiB
C
/* packet-bicc_mst.c
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* (Incomplete) Dissector for the 3GPP TS 29.205 BICC MST (Mobile Service Transport)
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*
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* This currently only dissects a single MST IE, which is required by the BSSMAP
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* dissector in order to decode the LCLS (Local Call Local Switch)
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* GCR (Global Call Reference)
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*
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* Copyright 2019 by Harald Welte <laforge@gnumonks.org>
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include <epan/tap.h>
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#include <epan/expert.h>
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#include "packet-bicc_mst.h"
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void proto_register_bicc_mst(void);
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static int proto_bicc_mst = -1;
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static int hf_lcls_gcr_network_id_len = -1;
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static int hf_lcls_gcr_network_id = -1;
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static int hf_lcls_gcr_node_id_len = -1;
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static int hf_lcls_gcr_node_id = -1;
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static int hf_lcls_gcr_call_ref_id_len = -1;
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static int hf_lcls_gcr_call_ref_id = -1;
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static int ett_lcls_gcr = -1;
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guint
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dissect_bicc_mst_lcls_gcr(tvbuff_t *tvb, proto_tree *tree, guint32 offset, guint len)
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{
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guint net_id_len, node_id_len, call_ref_id_len;
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guint32 curr_offset = offset;
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proto_tree *subtree;
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proto_item *ti;
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ti = proto_tree_add_protocol_format(tree, proto_bicc_mst, tvb, offset, len, "BICC MST GCR");
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subtree = proto_item_add_subtree(ti, ett_lcls_gcr);
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proto_tree_add_item_ret_uint(subtree, hf_lcls_gcr_network_id_len, tvb, curr_offset++, 1, ENC_NA, &net_id_len);
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proto_tree_add_item(subtree, hf_lcls_gcr_network_id, tvb, curr_offset, net_id_len, ENC_NA);
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curr_offset += net_id_len;
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proto_tree_add_item_ret_uint(subtree, hf_lcls_gcr_node_id_len, tvb, curr_offset++, 1, ENC_NA, &node_id_len);
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proto_tree_add_item(subtree, hf_lcls_gcr_node_id, tvb, curr_offset, node_id_len, ENC_NA);
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curr_offset += node_id_len;
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proto_tree_add_item_ret_uint(subtree, hf_lcls_gcr_call_ref_id_len, tvb, curr_offset++, 1, ENC_NA, &call_ref_id_len);
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proto_tree_add_item(subtree, hf_lcls_gcr_call_ref_id, tvb, curr_offset, call_ref_id_len, ENC_NA);
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curr_offset += call_ref_id_len;
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return curr_offset - offset;
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}
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void
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proto_register_bicc_mst(void)
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{
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static hf_register_info hf[] = {
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{ &hf_lcls_gcr_network_id_len, { "Length of LCLS GCR Network ID",
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"bicc_mst.lcls_gcr.network_id_len", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
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{ &hf_lcls_gcr_network_id, { "LCLS GCR Network ID",
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"bicc_mst.lcls_gcr.network_id", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
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{ &hf_lcls_gcr_node_id_len, { "Length of LCLS GCR Node ID",
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"bicc_mst.lcls_gcr.node_id_len", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
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{ &hf_lcls_gcr_node_id, { "LCLS GCR Network ID",
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"bicc_mst.lcls_gcr.network_id", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
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{ &hf_lcls_gcr_call_ref_id_len, { "Length of LCLS GCR Call Ref ID",
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"bicc_mst.lcls_gcr.call_ref_id_len", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
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{ &hf_lcls_gcr_call_ref_id, { "LCLS GCR Call Ref ID",
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"bicc_mst.lcls_gcr.call_ref_id", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
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};
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static gint *ett[] = {
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&ett_lcls_gcr,
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};
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proto_bicc_mst = proto_register_protocol("3GPP BICC MST", "BICC-MST", "bicc_mst");
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proto_register_field_array(proto_bicc_mst, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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/*
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* Editor modelines - https://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 8
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* tab-width: 8
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* indent-tabs-mode: t
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* End:
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*
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* vi: set shiftwidth=8 tabstop=8 noexpandtab:
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* :indentSize=8:tabSize=8:noTabs=false:
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*/
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