443a7ed259
Some of the ASN.1 dissectors still generate a new_create_dissector_handle from the tool itself, so leave those for now. Change-Id: Ic6e5803b1444d7ac24070949f5fd557909a5641f Reviewed-on: https://code.wireshark.org/review/12484 Petri-Dish: Anders Broman <a.broman58@gmail.com> Reviewed-by: Michael Mann <mmann78@netscape.net>
315 lines
11 KiB
C
315 lines
11 KiB
C
/* packet-dvb-eit.c
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* Routines for DVB (ETSI EN 300 468) Event Information Table (EIT) 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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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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_eit(void);
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void proto_reg_handoff_dvb_eit(void);
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static int proto_dvb_eit = -1;
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static int hf_dvb_eit_service_id = -1;
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static int hf_dvb_eit_reserved = -1;
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static int hf_dvb_eit_version_number = -1;
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static int hf_dvb_eit_current_next_indicator = -1;
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static int hf_dvb_eit_section_number = -1;
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static int hf_dvb_eit_last_section_number = -1;
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static int hf_dvb_eit_transport_stream_id = -1;
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static int hf_dvb_eit_original_network_id = -1;
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static int hf_dvb_eit_segment_last_section_number = -1;
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static int hf_dvb_eit_last_table_id = -1;
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static int hf_dvb_eit_event_id = -1;
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static int hf_dvb_eit_start_time = -1;
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static int hf_dvb_eit_duration = -1;
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static int hf_dvb_eit_running_status = -1;
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static int hf_dvb_eit_free_ca_mode = -1;
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static int hf_dvb_eit_descriptors_loop_length = -1;
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static gint ett_dvb_eit = -1;
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static gint ett_dvb_eit_event = -1;
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#define DVB_EIT_RESERVED_MASK 0xC0
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#define DVB_EIT_VERSION_NUMBER_MASK 0x3E
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#define DVB_EIT_CURRENT_NEXT_INDICATOR_MASK 0x01
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#define DVB_EIT_RUNNING_STATUS_MASK 0xE000
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#define DVB_EIT_FREE_CA_MODE_MASK 0x1000
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#define DVB_EIT_DESCRIPTORS_LOOP_LENGTH_MASK 0x0FFF
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static const value_string dvb_eit_cur_next_vals[] = {
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{ 0, "Not yet applicable" },
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{ 1, "Currently applicable" },
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{ 0, NULL }
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};
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static const value_string dvb_eit_running_status_vals[] = {
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{ 0, "Undefined" },
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{ 1, "Not Running" },
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{ 2, "Starts in a few seconds" },
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{ 3, "Pausing" },
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{ 4, "Running" },
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{ 5, "Service off-air" },
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{ 0, NULL }
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};
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static const value_string dvb_eit_free_ca_mode_vals[] = {
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{ 0, "Not Scrambled" },
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{ 1, "One or more component scrambled" },
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{ 0, NULL }
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};
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static int
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dissect_dvb_eit(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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guint offset = 0, length = 0;
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guint descriptor_len;
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guint16 evt_id;
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proto_item *ti;
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proto_tree *dvb_eit_tree;
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proto_tree *dvb_eit_event_tree;
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proto_item *duration_item;
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nstime_t start_time;
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col_set_str(pinfo->cinfo, COL_INFO, "Event Information Table (EIT)");
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ti = proto_tree_add_item(tree, proto_dvb_eit, tvb, offset, -1, ENC_NA);
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dvb_eit_tree = proto_item_add_subtree(ti, ett_dvb_eit);
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offset += packet_mpeg_sect_header(tvb, offset, dvb_eit_tree, &length, NULL);
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length -= 4;
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proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_service_id, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_reserved, tvb, offset, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_version_number, tvb, offset, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_current_next_indicator, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_section_number, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_last_section_number, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_transport_stream_id, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_original_network_id, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_segment_last_section_number, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_last_table_id, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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if (offset >= length) {
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packet_mpeg_sect_crc(tvb, pinfo, dvb_eit_tree, 0, offset);
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return offset;
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}
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/* Parse all the events */
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while (offset < length) {
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evt_id = tvb_get_ntohs(tvb, offset);
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dvb_eit_event_tree = proto_tree_add_subtree_format(dvb_eit_tree, tvb, offset, 12, ett_dvb_eit_event, NULL, "Event 0x%04hx", evt_id);
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proto_tree_add_item(dvb_eit_event_tree, hf_dvb_eit_event_id, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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if (tvb_memeql(tvb, offset, "\xFF\xFF\xFF\xFF\xFF", 5)) {
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if (packet_mpeg_sect_mjd_to_utc_time(tvb, offset, &start_time) < 0) {
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proto_tree_add_time_format(dvb_eit_event_tree, hf_dvb_eit_start_time, tvb, offset, 5,
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&start_time, "Unparseable time");
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} else {
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proto_tree_add_time(dvb_eit_event_tree, hf_dvb_eit_start_time, tvb, offset,
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5, &start_time);
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}
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} else {
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start_time.secs = 0xFFFFFFFF;
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start_time.nsecs = 0xFFFFFFFF;
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proto_tree_add_time_format_value(tree, hf_dvb_eit_start_time, tvb, offset, 5, &start_time, "Undefined (0xFFFFFFFFFF)");
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}
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offset += 5;
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duration_item = proto_tree_add_item(dvb_eit_event_tree, hf_dvb_eit_duration, tvb, offset, 3, ENC_BIG_ENDIAN);
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proto_item_append_text(duration_item, " (%02u:%02u:%02u)",
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MPEG_SECT_BCD44_TO_DEC(tvb_get_guint8(tvb, offset)),
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MPEG_SECT_BCD44_TO_DEC(tvb_get_guint8(tvb, offset + 1)),
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MPEG_SECT_BCD44_TO_DEC(tvb_get_guint8(tvb, offset + 2)));
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offset += 3;
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proto_tree_add_item(dvb_eit_event_tree, hf_dvb_eit_running_status, tvb, offset, 2, ENC_BIG_ENDIAN);
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proto_tree_add_item(dvb_eit_event_tree, hf_dvb_eit_free_ca_mode, tvb, offset, 2, ENC_BIG_ENDIAN);
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proto_tree_add_item(dvb_eit_event_tree, hf_dvb_eit_descriptors_loop_length, tvb, offset, 2, ENC_BIG_ENDIAN);
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descriptor_len = tvb_get_ntohs(tvb, offset) & DVB_EIT_DESCRIPTORS_LOOP_LENGTH_MASK;
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offset += 2;
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offset += proto_mpeg_descriptor_loop_dissect(tvb, offset, descriptor_len, dvb_eit_event_tree);
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}
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offset += packet_mpeg_sect_crc(tvb, pinfo, dvb_eit_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_eit(void)
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{
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static hf_register_info hf[] = {
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{ &hf_dvb_eit_service_id, {
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"Service ID", "dvb_eit.sid",
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FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL
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} },
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{ &hf_dvb_eit_reserved, {
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"Reserved", "dvb_eit.reserved",
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FT_UINT8, BASE_HEX, NULL, DVB_EIT_RESERVED_MASK, NULL, HFILL
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} },
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{ &hf_dvb_eit_version_number, {
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"Version Number", "dvb_eit.version",
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FT_UINT8, BASE_HEX, NULL, DVB_EIT_VERSION_NUMBER_MASK, NULL, HFILL
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} },
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{ &hf_dvb_eit_current_next_indicator, {
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"Current/Next Indicator", "dvb_eit.cur_next_ind",
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FT_UINT8, BASE_DEC, VALS(dvb_eit_cur_next_vals), DVB_EIT_CURRENT_NEXT_INDICATOR_MASK, NULL, HFILL
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} },
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{ &hf_dvb_eit_section_number, {
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"Section Number", "dvb_eit.sect_num",
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FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL
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} },
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{ &hf_dvb_eit_last_section_number, {
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"Last Section Number", "dvb_eit.last_sect_num",
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FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL
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} },
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{ &hf_dvb_eit_transport_stream_id, {
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"Transport Stream ID", "dvb_eit.tsid",
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FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL
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} },
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{ &hf_dvb_eit_original_network_id, {
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"Original Network ID", "dvb_eit.original_nid",
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FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL
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} },
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{ &hf_dvb_eit_segment_last_section_number, {
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"Segment Last Section Number", "dvb_eit.segment_last_sect_num",
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FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL
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} },
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{ &hf_dvb_eit_last_table_id, {
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"Last Table ID", "dvb_eit.last_tid",
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FT_UINT8, BASE_HEX, NULL, 0, NULL, HFILL
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} },
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{ &hf_dvb_eit_event_id, {
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"Event ID", "dvb_eit.evt.id",
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FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL
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} },
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{ &hf_dvb_eit_start_time, {
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"UTC Start Time", "dvb_eit.evt.start_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_eit_duration, {
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"Duration", "dvb_eit.evt.duration",
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FT_UINT24, BASE_HEX, NULL, 0, NULL, HFILL
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} },
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{ &hf_dvb_eit_running_status, {
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"Running Status", "dvb_eit.evt.running_status",
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FT_UINT16, BASE_HEX, VALS(dvb_eit_running_status_vals), DVB_EIT_RUNNING_STATUS_MASK, NULL, HFILL
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} },
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{ &hf_dvb_eit_free_ca_mode, {
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"Free CA Mode", "dvb_eit.evt.free_ca_mode",
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FT_UINT16, BASE_HEX, VALS(dvb_eit_free_ca_mode_vals), DVB_EIT_FREE_CA_MODE_MASK, NULL, HFILL
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} },
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{ &hf_dvb_eit_descriptors_loop_length, {
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"Descriptors Loop Length", "dvb_eit.evt.descr_loop_len",
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FT_UINT16, BASE_HEX, NULL, DVB_EIT_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_eit,
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&ett_dvb_eit_event
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};
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proto_dvb_eit = proto_register_protocol("DVB Event Information Table", "DVB EIT", "dvb_eit");
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proto_register_field_array(proto_dvb_eit, 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_eit(void)
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{
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int tid;
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dissector_handle_t dvb_eit_handle;
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dvb_eit_handle = create_dissector_handle(dissect_dvb_eit, proto_dvb_eit);
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for (tid = DVB_EIT_TID_MIN; tid <= DVB_EIT_TID_MAX; tid++)
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dissector_add_uint("mpeg_sect.tid", tid, dvb_eit_handle);
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}
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/*
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* Editor modelines - http://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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