2 * Routines for DVB (ETSI EN 300 468) Event Information Table (EIT) dissection
3 * Copyright 2012, Guy Martin <gmsoft@tuxicoman.be>
5 * Wireshark - Network traffic analyzer
6 * By Gerald Combs <gerald@wireshark.org>
7 * Copyright 1998 Gerald Combs
9 * SPDX-License-Identifier: GPL-2.0-or-later
14 #include <epan/packet.h>
15 #include "packet-mpeg-sect.h"
16 #include "packet-mpeg-descriptor.h"
18 void proto_register_dvb_eit(void);
19 void proto_reg_handoff_dvb_eit(void);
21 static int proto_dvb_eit = -1;
22 static int hf_dvb_eit_service_id = -1;
23 static int hf_dvb_eit_reserved = -1;
24 static int hf_dvb_eit_version_number = -1;
25 static int hf_dvb_eit_current_next_indicator = -1;
26 static int hf_dvb_eit_section_number = -1;
27 static int hf_dvb_eit_last_section_number = -1;
29 static int hf_dvb_eit_transport_stream_id = -1;
30 static int hf_dvb_eit_original_network_id = -1;
31 static int hf_dvb_eit_segment_last_section_number = -1;
32 static int hf_dvb_eit_last_table_id = -1;
34 static int hf_dvb_eit_event_id = -1;
35 static int hf_dvb_eit_start_time = -1;
36 static int hf_dvb_eit_duration = -1;
37 static int hf_dvb_eit_running_status = -1;
38 static int hf_dvb_eit_free_ca_mode = -1;
39 static int hf_dvb_eit_descriptors_loop_length = -1;
41 static gint ett_dvb_eit = -1;
42 static gint ett_dvb_eit_event = -1;
45 #define DVB_EIT_RESERVED_MASK 0xC0
46 #define DVB_EIT_VERSION_NUMBER_MASK 0x3E
47 #define DVB_EIT_CURRENT_NEXT_INDICATOR_MASK 0x01
49 #define DVB_EIT_RUNNING_STATUS_MASK 0xE000
50 #define DVB_EIT_FREE_CA_MODE_MASK 0x1000
51 #define DVB_EIT_DESCRIPTORS_LOOP_LENGTH_MASK 0x0FFF
53 static const value_string dvb_eit_cur_next_vals[] = {
54 { 0, "Not yet applicable" },
55 { 1, "Currently applicable" },
60 static const value_string dvb_eit_running_status_vals[] = {
63 { 2, "Starts in a few seconds" },
66 { 5, "Service off-air" },
71 static const value_string dvb_eit_free_ca_mode_vals[] = {
72 { 0, "Not Scrambled" },
73 { 1, "One or more component scrambled" },
79 dissect_dvb_eit(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
82 guint offset = 0, length = 0;
87 proto_tree *dvb_eit_tree;
88 proto_tree *dvb_eit_event_tree;
89 proto_item *duration_item;
93 col_set_str(pinfo->cinfo, COL_INFO, "Event Information Table (EIT)");
95 ti = proto_tree_add_item(tree, proto_dvb_eit, tvb, offset, -1, ENC_NA);
96 dvb_eit_tree = proto_item_add_subtree(ti, ett_dvb_eit);
98 offset += packet_mpeg_sect_header(tvb, offset, dvb_eit_tree, &length, NULL);
101 proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_service_id, tvb, offset, 2, ENC_BIG_ENDIAN);
104 proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_reserved, tvb, offset, 1, ENC_BIG_ENDIAN);
105 proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_version_number, tvb, offset, 1, ENC_BIG_ENDIAN);
106 proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_current_next_indicator, tvb, offset, 1, ENC_BIG_ENDIAN);
109 proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_section_number, tvb, offset, 1, ENC_BIG_ENDIAN);
112 proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_last_section_number, tvb, offset, 1, ENC_BIG_ENDIAN);
115 proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_transport_stream_id, tvb, offset, 2, ENC_BIG_ENDIAN);
118 proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_original_network_id, tvb, offset, 2, ENC_BIG_ENDIAN);
121 proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_segment_last_section_number, tvb, offset, 1, ENC_BIG_ENDIAN);
124 proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_last_table_id, tvb, offset, 1, ENC_BIG_ENDIAN);
127 if (offset >= length) {
128 packet_mpeg_sect_crc(tvb, pinfo, dvb_eit_tree, 0, offset);
133 /* Parse all the events */
134 while (offset < length) {
136 evt_id = tvb_get_ntohs(tvb, offset);
137 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);
139 proto_tree_add_item(dvb_eit_event_tree, hf_dvb_eit_event_id, tvb, offset, 2, ENC_BIG_ENDIAN);
142 if (tvb_memeql(tvb, offset, "\xFF\xFF\xFF\xFF\xFF", 5)) {
143 if (packet_mpeg_sect_mjd_to_utc_time(tvb, offset, &start_time) < 0) {
144 proto_tree_add_time_format(dvb_eit_event_tree, hf_dvb_eit_start_time, tvb, offset, 5,
145 &start_time, "Unparseable time");
147 proto_tree_add_time(dvb_eit_event_tree, hf_dvb_eit_start_time, tvb, offset,
151 start_time.secs = 0xFFFFFFFF;
152 start_time.nsecs = 0xFFFFFFFF;
153 proto_tree_add_time_format_value(tree, hf_dvb_eit_start_time, tvb, offset, 5, &start_time, "Undefined (0xFFFFFFFFFF)");
157 duration_item = proto_tree_add_item(dvb_eit_event_tree, hf_dvb_eit_duration, tvb, offset, 3, ENC_BIG_ENDIAN);
158 proto_item_append_text(duration_item, " (%02u:%02u:%02u)",
159 MPEG_SECT_BCD44_TO_DEC(tvb_get_guint8(tvb, offset)),
160 MPEG_SECT_BCD44_TO_DEC(tvb_get_guint8(tvb, offset + 1)),
161 MPEG_SECT_BCD44_TO_DEC(tvb_get_guint8(tvb, offset + 2)));
164 proto_tree_add_item(dvb_eit_event_tree, hf_dvb_eit_running_status, tvb, offset, 2, ENC_BIG_ENDIAN);
165 proto_tree_add_item(dvb_eit_event_tree, hf_dvb_eit_free_ca_mode, tvb, offset, 2, ENC_BIG_ENDIAN);
166 proto_tree_add_item(dvb_eit_event_tree, hf_dvb_eit_descriptors_loop_length, tvb, offset, 2, ENC_BIG_ENDIAN);
167 descriptor_len = tvb_get_ntohs(tvb, offset) & DVB_EIT_DESCRIPTORS_LOOP_LENGTH_MASK;
170 offset += proto_mpeg_descriptor_loop_dissect(tvb, offset, descriptor_len, dvb_eit_event_tree);
173 offset += packet_mpeg_sect_crc(tvb, pinfo, dvb_eit_tree, 0, offset);
174 proto_item_set_len(ti, offset);
175 return tvb_captured_length(tvb);
180 proto_register_dvb_eit(void)
183 static hf_register_info hf[] = {
185 { &hf_dvb_eit_service_id, {
186 "Service ID", "dvb_eit.sid",
187 FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL
190 { &hf_dvb_eit_reserved, {
191 "Reserved", "dvb_eit.reserved",
192 FT_UINT8, BASE_HEX, NULL, DVB_EIT_RESERVED_MASK, NULL, HFILL
195 { &hf_dvb_eit_version_number, {
196 "Version Number", "dvb_eit.version",
197 FT_UINT8, BASE_HEX, NULL, DVB_EIT_VERSION_NUMBER_MASK, NULL, HFILL
200 { &hf_dvb_eit_current_next_indicator, {
201 "Current/Next Indicator", "dvb_eit.cur_next_ind",
202 FT_UINT8, BASE_DEC, VALS(dvb_eit_cur_next_vals), DVB_EIT_CURRENT_NEXT_INDICATOR_MASK, NULL, HFILL
205 { &hf_dvb_eit_section_number, {
206 "Section Number", "dvb_eit.sect_num",
207 FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL
210 { &hf_dvb_eit_last_section_number, {
211 "Last Section Number", "dvb_eit.last_sect_num",
212 FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL
215 { &hf_dvb_eit_transport_stream_id, {
216 "Transport Stream ID", "dvb_eit.tsid",
217 FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL
220 { &hf_dvb_eit_original_network_id, {
221 "Original Network ID", "dvb_eit.original_nid",
222 FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL
225 { &hf_dvb_eit_segment_last_section_number, {
226 "Segment Last Section Number", "dvb_eit.segment_last_sect_num",
227 FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL
230 { &hf_dvb_eit_last_table_id, {
231 "Last Table ID", "dvb_eit.last_tid",
232 FT_UINT8, BASE_HEX, NULL, 0, NULL, HFILL
235 { &hf_dvb_eit_event_id, {
236 "Event ID", "dvb_eit.evt.id",
237 FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL
240 { &hf_dvb_eit_start_time, {
241 "UTC Start Time", "dvb_eit.evt.start_time",
242 FT_ABSOLUTE_TIME, ABSOLUTE_TIME_UTC, NULL, 0, NULL, HFILL
245 { &hf_dvb_eit_duration, {
246 "Duration", "dvb_eit.evt.duration",
247 FT_UINT24, BASE_HEX, NULL, 0, NULL, HFILL
250 { &hf_dvb_eit_running_status, {
251 "Running Status", "dvb_eit.evt.running_status",
252 FT_UINT16, BASE_HEX, VALS(dvb_eit_running_status_vals), DVB_EIT_RUNNING_STATUS_MASK, NULL, HFILL
255 { &hf_dvb_eit_free_ca_mode, {
256 "Free CA Mode", "dvb_eit.evt.free_ca_mode",
257 FT_UINT16, BASE_HEX, VALS(dvb_eit_free_ca_mode_vals), DVB_EIT_FREE_CA_MODE_MASK, NULL, HFILL
260 { &hf_dvb_eit_descriptors_loop_length, {
261 "Descriptors Loop Length", "dvb_eit.evt.descr_loop_len",
262 FT_UINT16, BASE_HEX, NULL, DVB_EIT_DESCRIPTORS_LOOP_LENGTH_MASK, NULL, HFILL
266 static gint *ett[] = {
271 proto_dvb_eit = proto_register_protocol("DVB Event Information Table", "DVB EIT", "dvb_eit");
273 proto_register_field_array(proto_dvb_eit, hf, array_length(hf));
274 proto_register_subtree_array(ett, array_length(ett));
279 void proto_reg_handoff_dvb_eit(void)
282 dissector_handle_t dvb_eit_handle;
284 dvb_eit_handle = create_dissector_handle(dissect_dvb_eit, proto_dvb_eit);
286 for (tid = DVB_EIT_TID_MIN; tid <= DVB_EIT_TID_MAX; tid++)
287 dissector_add_uint("mpeg_sect.tid", tid, dvb_eit_handle);
292 * Editor modelines - http://www.wireshark.org/tools/modelines.html
297 * indent-tabs-mode: nil
300 * vi: set shiftwidth=4 tabstop=8 expandtab:
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