From e4ba6dbc3f1e76890b22773807ea37fe8fa2b1bc Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 10 Apr 2024 22:34:10 +0200 Subject: Adding upstream version 4.2.2. Signed-off-by: Daniel Baumann --- epan/dissectors/packet-dvb-eit.c | 295 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 295 insertions(+) create mode 100644 epan/dissectors/packet-dvb-eit.c (limited to 'epan/dissectors/packet-dvb-eit.c') diff --git a/epan/dissectors/packet-dvb-eit.c b/epan/dissectors/packet-dvb-eit.c new file mode 100644 index 00000000..60493319 --- /dev/null +++ b/epan/dissectors/packet-dvb-eit.c @@ -0,0 +1,295 @@ +/* packet-dvb-eit.c + * Routines for DVB (ETSI EN 300 468) Event Information Table (EIT) dissection + * Copyright 2012, Guy Martin + * + * Wireshark - Network traffic analyzer + * By Gerald Combs + * Copyright 1998 Gerald Combs + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include "config.h" + +#include +#include "packet-mpeg-sect.h" +#include "packet-mpeg-descriptor.h" + +void proto_register_dvb_eit(void); +void proto_reg_handoff_dvb_eit(void); + +static dissector_handle_t dvb_eit_handle; + +static int proto_dvb_eit = -1; +static int hf_dvb_eit_service_id = -1; +static int hf_dvb_eit_reserved = -1; +static int hf_dvb_eit_version_number = -1; +static int hf_dvb_eit_current_next_indicator = -1; +static int hf_dvb_eit_section_number = -1; +static int hf_dvb_eit_last_section_number = -1; + +static int hf_dvb_eit_transport_stream_id = -1; +static int hf_dvb_eit_original_network_id = -1; +static int hf_dvb_eit_segment_last_section_number = -1; +static int hf_dvb_eit_last_table_id = -1; + +static int hf_dvb_eit_event_id = -1; +static int hf_dvb_eit_start_time = -1; +static int hf_dvb_eit_duration = -1; +static int hf_dvb_eit_running_status = -1; +static int hf_dvb_eit_free_ca_mode = -1; +static int hf_dvb_eit_descriptors_loop_length = -1; + +static gint ett_dvb_eit = -1; +static gint ett_dvb_eit_event = -1; + + +#define DVB_EIT_RESERVED_MASK 0xC0 +#define DVB_EIT_VERSION_NUMBER_MASK 0x3E +#define DVB_EIT_CURRENT_NEXT_INDICATOR_MASK 0x01 + +#define DVB_EIT_RUNNING_STATUS_MASK 0xE000 +#define DVB_EIT_FREE_CA_MODE_MASK 0x1000 +#define DVB_EIT_DESCRIPTORS_LOOP_LENGTH_MASK 0x0FFF + +static const value_string dvb_eit_running_status_vals[] = { + { 0, "Undefined" }, + { 1, "Not Running" }, + { 2, "Starts in a few seconds" }, + { 3, "Pausing" }, + { 4, "Running" }, + { 5, "Service off-air" }, + + { 0, NULL } +}; + +static const value_string dvb_eit_free_ca_mode_vals[] = { + { 0, "Not Scrambled" }, + { 1, "One or more component scrambled" }, + + { 0, NULL } +}; + +static int +dissect_dvb_eit(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) +{ + + guint offset = 0, length = 0; + guint descriptor_len; + guint16 evt_id; + + proto_item *ti; + proto_tree *dvb_eit_tree; + proto_tree *dvb_eit_event_tree; + proto_item *duration_item; + + nstime_t start_time; + + col_set_str(pinfo->cinfo, COL_INFO, "Event Information Table (EIT)"); + + ti = proto_tree_add_item(tree, proto_dvb_eit, tvb, offset, -1, ENC_NA); + dvb_eit_tree = proto_item_add_subtree(ti, ett_dvb_eit); + + offset += packet_mpeg_sect_header(tvb, offset, dvb_eit_tree, &length, NULL); + length -= 4; + + proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_service_id, tvb, offset, 2, ENC_BIG_ENDIAN); + offset += 2; + + proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_reserved, tvb, offset, 1, ENC_BIG_ENDIAN); + proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_version_number, tvb, offset, 1, ENC_BIG_ENDIAN); + proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_current_next_indicator, tvb, offset, 1, ENC_BIG_ENDIAN); + offset += 1; + + proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_section_number, tvb, offset, 1, ENC_BIG_ENDIAN); + offset += 1; + + proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_last_section_number, tvb, offset, 1, ENC_BIG_ENDIAN); + offset += 1; + + proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_transport_stream_id, tvb, offset, 2, ENC_BIG_ENDIAN); + offset += 2; + + proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_original_network_id, tvb, offset, 2, ENC_BIG_ENDIAN); + offset += 2; + + proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_segment_last_section_number, tvb, offset, 1, ENC_BIG_ENDIAN); + offset += 1; + + proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_last_table_id, tvb, offset, 1, ENC_BIG_ENDIAN); + offset += 1; + + if (offset >= length) { + packet_mpeg_sect_crc(tvb, pinfo, dvb_eit_tree, 0, offset); + + return offset; + } + + /* Parse all the events */ + while (offset < length) { + + evt_id = tvb_get_ntohs(tvb, offset); + 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); + + proto_tree_add_item(dvb_eit_event_tree, hf_dvb_eit_event_id, tvb, offset, 2, ENC_BIG_ENDIAN); + offset += 2; + + if (tvb_memeql(tvb, offset, (const guint8*)"\xFF\xFF\xFF\xFF\xFF", 5)) { + if (packet_mpeg_sect_mjd_to_utc_time(tvb, offset, &start_time) < 0) { + proto_tree_add_time_format(dvb_eit_event_tree, hf_dvb_eit_start_time, tvb, offset, 5, + &start_time, "Unparseable time"); + } else { + proto_tree_add_time(dvb_eit_event_tree, hf_dvb_eit_start_time, tvb, offset, + 5, &start_time); + } + } else { + start_time.secs = 0xFFFFFFFF; + start_time.nsecs = 0xFFFFFFFF; + proto_tree_add_time_format_value(tree, hf_dvb_eit_start_time, tvb, offset, 5, &start_time, "Undefined (0xFFFFFFFFFF)"); + } + offset += 5; + + duration_item = proto_tree_add_item(dvb_eit_event_tree, hf_dvb_eit_duration, tvb, offset, 3, ENC_BIG_ENDIAN); + proto_item_append_text(duration_item, " (%02u:%02u:%02u)", + MPEG_SECT_BCD44_TO_DEC(tvb_get_guint8(tvb, offset)), + MPEG_SECT_BCD44_TO_DEC(tvb_get_guint8(tvb, offset + 1)), + MPEG_SECT_BCD44_TO_DEC(tvb_get_guint8(tvb, offset + 2))); + offset += 3; + + proto_tree_add_item(dvb_eit_event_tree, hf_dvb_eit_running_status, tvb, offset, 2, ENC_BIG_ENDIAN); + proto_tree_add_item(dvb_eit_event_tree, hf_dvb_eit_free_ca_mode, tvb, offset, 2, ENC_BIG_ENDIAN); + proto_tree_add_item(dvb_eit_event_tree, hf_dvb_eit_descriptors_loop_length, tvb, offset, 2, ENC_BIG_ENDIAN); + descriptor_len = tvb_get_ntohs(tvb, offset) & DVB_EIT_DESCRIPTORS_LOOP_LENGTH_MASK; + offset += 2; + + offset += proto_mpeg_descriptor_loop_dissect(tvb, offset, descriptor_len, dvb_eit_event_tree); + } + + offset += packet_mpeg_sect_crc(tvb, pinfo, dvb_eit_tree, 0, offset); + proto_item_set_len(ti, offset); + return tvb_captured_length(tvb); +} + + +void +proto_register_dvb_eit(void) +{ + + static hf_register_info hf[] = { + + { &hf_dvb_eit_service_id, { + "Service ID", "dvb_eit.sid", + FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL + } }, + + { &hf_dvb_eit_reserved, { + "Reserved", "dvb_eit.reserved", + FT_UINT8, BASE_HEX, NULL, DVB_EIT_RESERVED_MASK, NULL, HFILL + } }, + + { &hf_dvb_eit_version_number, { + "Version Number", "dvb_eit.version", + FT_UINT8, BASE_HEX, NULL, DVB_EIT_VERSION_NUMBER_MASK, NULL, HFILL + } }, + + { &hf_dvb_eit_current_next_indicator, { + "Current/Next Indicator", "dvb_eit.cur_next_ind", + FT_BOOLEAN, 8, TFS(&tfs_current_not_yet), DVB_EIT_CURRENT_NEXT_INDICATOR_MASK, NULL, HFILL + } }, + + { &hf_dvb_eit_section_number, { + "Section Number", "dvb_eit.sect_num", + FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL + } }, + + { &hf_dvb_eit_last_section_number, { + "Last Section Number", "dvb_eit.last_sect_num", + FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL + } }, + + { &hf_dvb_eit_transport_stream_id, { + "Transport Stream ID", "dvb_eit.tsid", + FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL + } }, + + { &hf_dvb_eit_original_network_id, { + "Original Network ID", "dvb_eit.original_nid", + FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL + } }, + + { &hf_dvb_eit_segment_last_section_number, { + "Segment Last Section Number", "dvb_eit.segment_last_sect_num", + FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL + } }, + + { &hf_dvb_eit_last_table_id, { + "Last Table ID", "dvb_eit.last_tid", + FT_UINT8, BASE_HEX, NULL, 0, NULL, HFILL + } }, + + { &hf_dvb_eit_event_id, { + "Event ID", "dvb_eit.evt.id", + FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL + } }, + + { &hf_dvb_eit_start_time, { + "UTC Start Time", "dvb_eit.evt.start_time", + FT_ABSOLUTE_TIME, ABSOLUTE_TIME_UTC, NULL, 0, NULL, HFILL + } }, + + { &hf_dvb_eit_duration, { + "Duration", "dvb_eit.evt.duration", + FT_UINT24, BASE_HEX, NULL, 0, NULL, HFILL + } }, + + { &hf_dvb_eit_running_status, { + "Running Status", "dvb_eit.evt.running_status", + FT_UINT16, BASE_HEX, VALS(dvb_eit_running_status_vals), DVB_EIT_RUNNING_STATUS_MASK, NULL, HFILL + } }, + + { &hf_dvb_eit_free_ca_mode, { + "Free CA Mode", "dvb_eit.evt.free_ca_mode", + FT_UINT16, BASE_HEX, VALS(dvb_eit_free_ca_mode_vals), DVB_EIT_FREE_CA_MODE_MASK, NULL, HFILL + } }, + + { &hf_dvb_eit_descriptors_loop_length, { + "Descriptors Loop Length", "dvb_eit.evt.descr_loop_len", + FT_UINT16, BASE_DEC, NULL, DVB_EIT_DESCRIPTORS_LOOP_LENGTH_MASK, NULL, HFILL + } } + }; + + static gint *ett[] = { + &ett_dvb_eit, + &ett_dvb_eit_event + }; + + proto_dvb_eit = proto_register_protocol("DVB Event Information Table", "DVB EIT", "dvb_eit"); + + proto_register_field_array(proto_dvb_eit, hf, array_length(hf)); + proto_register_subtree_array(ett, array_length(ett)); + + dvb_eit_handle = register_dissector("dvb_eit", dissect_dvb_eit, proto_dvb_eit); +} + + +void proto_reg_handoff_dvb_eit(void) +{ + int tid; + + for (tid = DVB_EIT_TID_MIN; tid <= DVB_EIT_TID_MAX; tid++) + dissector_add_uint("mpeg_sect.tid", tid, dvb_eit_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: + */ -- cgit v1.2.3