diff options
author | Jeff Morriss <jeff.morriss@ulticom.com> | 2012-03-23 23:49:14 +0000 |
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committer | Jeff Morriss <jeff.morriss@ulticom.com> | 2012-03-23 23:49:14 +0000 |
commit | 751930fccb0879526ac28911e6e22a748122fd2b (patch) | |
tree | 398b3472a244773be0d40e6a0fd145c1af64a47f /epan/dissectors/packet-dvb-eit.c | |
parent | b338cf88053511833b2bd789973f69484dcfa297 (diff) |
From Guy Martin via https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=6989 :
Add support for DVB EIT packets from ETSI EN 300 468.
svn path=/trunk/; revision=41750
Diffstat (limited to 'epan/dissectors/packet-dvb-eit.c')
-rw-r--r-- | epan/dissectors/packet-dvb-eit.c | 308 |
1 files changed, 308 insertions, 0 deletions
diff --git a/epan/dissectors/packet-dvb-eit.c b/epan/dissectors/packet-dvb-eit.c new file mode 100644 index 0000000000..0f3086bde3 --- /dev/null +++ b/epan/dissectors/packet-dvb-eit.c @@ -0,0 +1,308 @@ +/* packet-dvb-eit.c + * Routines for DVB (ETSI EN 300 468) Event Information Table (EIT) dissection + * Copyright 2012, Guy Martin <gmsoft@tuxicoman.be> + * + * $Id$ + * + * Wireshark - Network traffic analyzer + * By Gerald Combs <gerald@wireshark.org> + * Copyright 1998 Gerald Combs + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include <glib.h> + +#include <epan/packet.h> +#include <epan/dissectors/packet-mpeg-sect.h> + +#include "packet-mpeg-descriptor.h" + +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_TID_MIN 0x4E +#define DVB_EIT_TID_MAX 0x6F + +#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_cur_next_vals[] = { + { 0, "Not yet applicable" }, + { 1, "Currently applicable" }, + + { 0, NULL } +}; + +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 void +dissect_dvb_eit(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + + guint offset = 0, length = 0, descriptor_end = 0; + guint16 evt_id = 0, descriptor_len = 0; + + proto_item *ti = NULL; + proto_tree *dvb_eit_tree = NULL; + proto_item *ei = NULL; + proto_tree *dvb_eit_event_tree = NULL; + proto_item *duration_item = NULL; + + nstime_t start_time; + + col_clear(pinfo->cinfo, COL_INFO); + col_set_str(pinfo->cinfo, COL_INFO, "Event Information Table (EIT)"); + + if (!tree) + return; + + 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++; + + proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_section_number, tvb, offset, 1, ENC_BIG_ENDIAN); + offset++; + + proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_last_section_number, tvb, offset, 1, ENC_BIG_ENDIAN); + offset++; + + 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++; + + proto_tree_add_item(dvb_eit_tree, hf_dvb_eit_last_table_id, tvb, offset, 1, ENC_BIG_ENDIAN); + offset++; + + if (offset >= length) { + packet_mpeg_sect_crc(tvb, pinfo, dvb_eit_tree, 0, offset); + return; + } + + /* Parse all the events */ + while (offset < length) { + + evt_id = tvb_get_ntohs(tvb, offset); + ei = proto_tree_add_text(dvb_eit_tree, tvb, offset, 12, "Event 0x%04hx", evt_id); + dvb_eit_event_tree = proto_item_add_subtree(ei, ett_dvb_eit_event); + + 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, "\xFF\xFF\xFF\xFF\xFF", 5)) { + if (packet_mpeg_sect_mjd_to_utc_time(tvb, offset, &start_time) < 0) { + proto_tree_add_text(tree, tvb, offset, 5, "Unparseable time"); + } else { + proto_tree_add_time_format(dvb_eit_event_tree, hf_dvb_eit_start_time, tvb, offset, 5, &start_time, "Start Time: %s UTC", abs_time_to_str(&start_time, ABSOLUTE_TIME_UTC, FALSE)); + } + } else { + proto_tree_add_text(tree, 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; + + descriptor_end = offset + descriptor_len; + while (offset < descriptor_end) + offset += proto_mpeg_descriptor_dissect(tvb, offset, dvb_eit_event_tree); + + } + + packet_mpeg_sect_crc(tvb, pinfo, dvb_eit_tree, 0, offset); +} + + +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_UINT8, BASE_DEC, VALS(dvb_eit_cur_next_vals), 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_HEX, 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)); + +} + + +void proto_reg_handoff_dvb_eit(void) +{ + int tid; + dissector_handle_t dvb_eit_handle; + + dvb_eit_handle = create_dissector_handle(dissect_dvb_eit, proto_dvb_eit); + + for (tid = DVB_EIT_TID_MIN; tid <= DVB_EIT_TID_MAX; tid++) + dissector_add_uint("mpeg_sect.tid", tid, dvb_eit_handle); +} |