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