126 lines
3.5 KiB
C
126 lines
3.5 KiB
C
/* packet-dvb-tot.c
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* Routines for DVB (ETSI EN 300 468) Time Offset Table (TOT) dissection
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* Copyright 2012, Guy Martin <gmsoft@tuxicoman.be>
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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 "packet-mpeg-sect.h"
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#include "packet-mpeg-descriptor.h"
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void proto_register_dvb_tot(void);
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void proto_reg_handoff_dvb_tot(void);
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static int proto_dvb_tot = -1;
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static int hf_dvb_tot_utc_time = -1;
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static int hf_dvb_tot_reserved = -1;
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static int hf_dvb_tot_descriptors_loop_length = -1;
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static gint ett_dvb_tot = -1;
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#define DVB_TOT_RESERVED_MASK 0xF000
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#define DVB_TOT_DESCRIPTORS_LOOP_LENGTH_MASK 0x0FFF
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static int
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dissect_dvb_tot(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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guint offset = 0;
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guint descriptor_len;
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proto_item *ti;
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proto_tree *dvb_tot_tree;
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nstime_t utc_time;
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col_set_str(pinfo->cinfo, COL_INFO, "Time Offset Table (TOT)");
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ti = proto_tree_add_item(tree, proto_dvb_tot, tvb, offset, -1, ENC_NA);
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dvb_tot_tree = proto_item_add_subtree(ti, ett_dvb_tot);
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offset += packet_mpeg_sect_header(tvb, offset, dvb_tot_tree, NULL, NULL);
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if (packet_mpeg_sect_mjd_to_utc_time(tvb, offset, &utc_time) < 0) {
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proto_tree_add_time_format_value(dvb_tot_tree, hf_dvb_tot_utc_time, tvb, offset, 5, &utc_time, "Unparseable time");
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} else {
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proto_tree_add_time(dvb_tot_tree, hf_dvb_tot_utc_time, tvb, offset, 5, &utc_time);
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}
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offset += 5;
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descriptor_len = tvb_get_ntohs(tvb, offset) & DVB_TOT_DESCRIPTORS_LOOP_LENGTH_MASK;
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proto_tree_add_item(dvb_tot_tree, hf_dvb_tot_reserved, tvb, offset, 2, ENC_BIG_ENDIAN);
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proto_tree_add_item(dvb_tot_tree, hf_dvb_tot_descriptors_loop_length, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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offset += proto_mpeg_descriptor_loop_dissect(tvb, offset, descriptor_len, dvb_tot_tree);
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offset += packet_mpeg_sect_crc(tvb, pinfo, dvb_tot_tree, 0, offset);
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proto_item_set_len(ti, offset);
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return tvb_captured_length(tvb);
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}
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void
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proto_register_dvb_tot(void)
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{
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static hf_register_info hf[] = {
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{ &hf_dvb_tot_utc_time, {
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"UTC Time", "dvb_tot.utc_time",
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FT_ABSOLUTE_TIME, ABSOLUTE_TIME_UTC, NULL, 0, NULL, HFILL
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} },
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{ &hf_dvb_tot_reserved, {
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"Reserved", "dvb_tot.reserved",
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FT_UINT16, BASE_HEX, NULL, DVB_TOT_RESERVED_MASK, NULL, HFILL
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} },
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{ &hf_dvb_tot_descriptors_loop_length, {
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"Descriptors Loop Length", "dvb_tot.descr_loop_len",
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FT_UINT16, BASE_DEC, NULL, DVB_TOT_DESCRIPTORS_LOOP_LENGTH_MASK, NULL, HFILL
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} }
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};
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static gint *ett[] = {
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&ett_dvb_tot
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};
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proto_dvb_tot = proto_register_protocol("DVB Time Offset Table", "DVB TOT", "dvb_tot");
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proto_register_field_array(proto_dvb_tot, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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void proto_reg_handoff_dvb_tot(void)
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{
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dissector_handle_t dvb_tot_handle;
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dvb_tot_handle = create_dissector_handle(dissect_dvb_tot, proto_dvb_tot);
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dissector_add_uint("mpeg_sect.tid", DVB_TOT_TID, dvb_tot_handle);
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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: 4
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* vi: set shiftwidth=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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