/* packet-scte35.c * Routines for SCTE-35 dissection * Author: Ben Stewart * Copyright 2016 Google Inc. * * The SCTE-35 protocol is described by the Society of Cable Telecommunications * Engineers at . * * This module implements a dissector for the main table in a SCTE-35 message, a * splice_info_section. This payload is carried in a MPEG Section Table with a * table ID of 0xFC. PIDs carrying this sort of table are also noted in the PMT * with a stream type of 0x86, and a registration descriptor with fourcc 'CUEI'. * * The various splice command types are implemented in separate modules, and are * linked to this dissector through the field scte35.splice_command_type. All * field names follow the conventions documented in the SCTE35 specification. * * This dissector does not support encrypted SCTE35 messages, other than * indicating through the scte35.encrypted_packet flag. * * * Wireshark - Network traffic analyzer * By Gerald Combs * 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. */ #include "config.h" #include #define SCTE35_CMD_SPLICE_NULL (0x00) #define SCTE35_CMD_SPLICE_SCHEDULE (0x04) #define SCTE35_CMD_SPLICE_INSERT (0x05) #define SCTE35_CMD_TIME_SIGNAL (0x06) #define SCTE35_CMD_BANDWIDTH_RESERVATION (0x07) #define SCTE35_CMD_PRIVATE_COMMAND (0xff) #define SCTE35_AVAIL_DESCRIPTOR (0x00) #define SCTE35_DTMF_DESCRIPTOR (0x01) #define SCTE35_SEGMENTATION_DESCRIPTOR (0x02) void proto_register_scte35(void); void proto_register_scte35_private_command(void); void proto_register_scte35_splice_insert(void); void proto_register_scte35_splice_schedule(void); void proto_register_scte35_time_signal(void); void proto_reg_handoff_scte35(void); void proto_reg_handoff_scte35_private_command(void); void proto_reg_handoff_scte35_splice_insert(void); void proto_reg_handoff_scte35_splice_schedule(void); void proto_reg_handoff_scte35_time_signal(void); /* MPEG Section Table ID for a SCTE35 splice_info_section. */ static const unsigned char SCTE35_TABLE_ID = 0xFCU; /* Minimum length for a splice_info_section, excluding any splice commands, * splice descriptors, encrypted CRC or alignment stuffing. */ static const int SCTE35_SI_MIN_LEN = 20; /* Protocol handle */ static int proto_scte35 = -1; /* Dissector table for scte35.splice_command_type */ static dissector_table_t scte35_cmd_dissector_table = NULL; /* splice_info_section table */ static gint ett_scte35_splice_info_section = -1; /* splice_info_section fields */ static gint hf_table_id = -1; static gint hf_section_syntax_indicator = -1; static gint hf_private_indicator = -1; static gint hf_reserved = -1; static gint hf_section_length = -1; static gint hf_protocol_version = -1; static gint hf_encrypted_packet = -1; static gint hf_encryption_algorithm = -1; static gint hf_pts_adjustment = -1; static gint hf_cw_index = -1; static gint hf_tier = -1; static gint hf_splice_command_length = -1; static gint hf_splice_command_type = -1; static gint hf_descriptor_loop_length = -1; static gint hf_splice_descriptor_tag = -1; static gint hf_splice_descriptor_length = -1; static gint hf_splice_descriptor_identifier = -1; static gint hf_descriptor_provider_avail_id = -1; static gint hf_descriptor_preroll = -1; static gint hf_descriptor_dtmf_count = -1; static gint hf_descriptor_dtmf_reserved = -1; static gint hf_descriptor_dtmf = -1; static gint hf_descriptor_event_id = -1; static gint hf_descriptor_cancel_indicator = -1; static gint hf_descriptor_reserved0 = -1; static gint hf_descriptor_psf = -1; static gint hf_descriptor_segmentation_duration_flag = -1; static gint hf_descriptor_delivery_not_restricted_flag = -1; static gint hf_descriptor_web_delivery_allowed_flag = -1; static gint hf_descriptor_no_regional_blackout_flag = -1; static gint hf_descriptor_archive_allow_flag = -1; static gint hf_descriptor_device_restrictions = -1; static gint hf_descriptor_reserved1 = -1; static gint hf_descriptor_component_count = -1; static gint hf_descriptor_component_tag = -1; static gint hf_descriptor_component_reserved = -1; static gint hf_descriptor_component_pts_offset = -1; static gint hf_descriptor_segmentation_duration = -1; static gint hf_descriptor_segmentation_upid_type = -1; static gint hf_descriptor_segmentation_upid_length = -1; static gint hf_descriptor_segmentation_upid = -1; static gint hf_descriptor_segmentation_type_id = -1; static gint hf_descriptor_segment_num = -1; static gint hf_descriptor_segments_expected = -1; static gint hf_e_crc32 = -1; static gint hf_crc32 = -1; /* time_signal protocol and fields */ static int proto_scte35_time = -1; static gint ett_scte35_time_signal = -1; static gint ett_scte35_time_signal_splice_time = -1; static gint hf_time_specified = -1; static gint hf_time_reserved = -1; static gint hf_time_pts = -1; /* private_command protocol and fields */ static int proto_private_command = -1; static gint ett_private_command = -1; static gint hf_identifier = -1; static gint hf_private_byte = -1; /* Dissector table for scte35_private_command.identifier */ static dissector_table_t private_identifier_table = NULL; static dissector_handle_t scte35_handle = NULL; /* splice_insert protocol and fields */ static int proto_scte35_si = -1; static gint ett_scte35_splice_insert = -1; static gint hf_splice_insert_event_id = -1; static gint hf_splice_cancel_indicator = -1; static gint hf_reserved0 = -1; static gint hf_out_of_network_indicator = -1; static gint hf_program_splice_flag = -1; static gint hf_duration_flag = -1; static gint hf_splice_immediate_flag = -1; static gint hf_reserved1 = -1; static gint hf_splice_time_specified_flag = -1; static gint hf_splice_time_reserved = -1; static gint hf_splice_time_pts_time = -1; static gint hf_component_count = -1; static gint hf_component_tag = -1; static gint hf_component_splice_time_tsf = -1; static gint hf_component_splice_time_reserved = -1; static gint hf_component_splice_time_pts_time = -1; static gint hf_break_duration_auto_return = -1; static gint hf_break_duration_reserved = -1; static gint hf_break_duration_duration = -1; static gint hf_unique_program_id = -1; static gint hf_avail_num = -1; static gint hf_avails_expected = -1; /* splice_schedule protocol and fields */ static int proto_scte35_splice_schedule = -1; static gint ett_scte35_splice_schedule = -1; static gint hf_splice_count = -1; static gint hf_splice_event_id = -1; static gint hf_splice_event_cancel_indicator = -1; static gint hf_splice_reserved0 = -1; static gint hf_splice_out_of_network = -1; static gint hf_splice_program_splice_flag = -1; static gint hf_splice_duration_flag = -1; static gint hf_splice_reserved1 = -1; static gint hf_splice_utc_splice_time = -1; static gint hf_splice_component_count = -1; static gint hf_splice_component_tag = -1; static gint hf_splice_component_utc_splice_time = -1; static gint hf_splice_break_duration_auto_return = -1; static gint hf_splice_break_duration_reserved = -1; static gint hf_splice_break_duration_duration = -1; static gint hf_splice_unique_program_id = -1; static gint hf_splice_avail_num = -1; static gint hf_splice_avails_expected = -1; static const true_false_string tfs_section_syntax_indicator = { "Reserved", "MPEG short sections in use"}; static const true_false_string tfs_private_indicator = { "Reserved", "Mandatory value"}; static const true_false_string tfs_encrypted_packet = { "Encrypted data", "Cleartext"}; static const true_false_string tfs_descriptor_cancel_indicator = { "Cancel Request", "New or existing event"}; static const true_false_string tfs_descriptor_psf = { "All PIDs to be spliced", "Component Splice Mode"}; static const true_false_string tfs_descriptor_sdf = { "Segmentation duration present", "No duration present"}; static const true_false_string tfs_descriptor_dnr = { "No delivery restrictions", "Restricted delivery"}; static const true_false_string tfs_descriptor_web = { "Permitted", "Restricted"}; static const true_false_string tfs_descriptor_blackout = { "No regional blackouts", "Regional restrictions"}; static const true_false_string tfs_descriptor_archive = { "No recording restrictions", "Recording is restricted"}; static const range_string rv_splice_command_type[] = { { SCTE35_CMD_SPLICE_NULL, SCTE35_CMD_SPLICE_NULL, "splice_null" }, { 0x01, 0x03, "Reserved" }, { SCTE35_CMD_SPLICE_SCHEDULE, SCTE35_CMD_SPLICE_SCHEDULE, "splice_schedule" }, { SCTE35_CMD_SPLICE_INSERT, SCTE35_CMD_SPLICE_INSERT, "splice_insert" }, { SCTE35_CMD_TIME_SIGNAL, SCTE35_CMD_TIME_SIGNAL, "time_signal" }, { SCTE35_CMD_BANDWIDTH_RESERVATION, SCTE35_CMD_BANDWIDTH_RESERVATION, "bandwidth_reservation" }, { 0x08, 0xfe, "Reserved" }, { SCTE35_CMD_PRIVATE_COMMAND, SCTE35_CMD_PRIVATE_COMMAND, "private_command" }, { 0, 0, NULL } }; static const range_string rv_splice_descriptor_tag[] = { { SCTE35_AVAIL_DESCRIPTOR, SCTE35_AVAIL_DESCRIPTOR, "avail_descriptor" }, { SCTE35_DTMF_DESCRIPTOR, SCTE35_DTMF_DESCRIPTOR, "DTMF_descriptor" }, { SCTE35_SEGMENTATION_DESCRIPTOR, SCTE35_SEGMENTATION_DESCRIPTOR, "segmentation_descriptor" }, { 0x03, 0xff, "Reserved" }, { 0, 0, NULL } }; static const range_string scte35_device_restrictions[] = { { 0x00, 0x00, "Restrict Group 0" }, { 0x01, 0x01, "Restrict Group 1" }, { 0x02, 0x02, "Restrict Group 2" }, { 0x03, 0x03, "No Restrictions" }, { 0, 0, NULL } }; static const range_string scte35_segmentation_upid_type[] = { { 0x00, 0x00, "Not Used" }, { 0x01, 0x01, "User Defined (deprecated)" }, { 0x02, 0x02, "ISCI" }, { 0x03, 0x03, "Ad-ID" }, { 0x04, 0x04, "UMID (SMPTE 330M)" }, { 0x05, 0x05, "ISAN" }, { 0x06, 0x06, "Versioned ISAN" }, { 0x07, 0x07, "Tribune TID" }, { 0x08, 0x08, "Turner Identifier" }, { 0x09, 0x09, "CableLabs ADI Identifier" }, { 0x0a, 0x0a, "EIDR" }, { 0x0b, 0x0b, "ATSC A57/B Content Identifier" }, { 0x0c, 0x0c, "Managed Private UPID" }, { 0x0d, 0x0d, "Multiple UPIDs" }, { 0x0e, 0xff, "Reserved" }, { 0, 0, NULL } }; static const range_string scte35_segmentation_type_id[] = { { 0x00, 0x00, "Not Indicated" }, { 0x01, 0x01, "Content Identification" }, { 0x10, 0x10, "Program Start" }, { 0x11, 0x11, "Program End" }, { 0x12, 0x12, "Program Early Termination" }, { 0x13, 0x13, "Program Breakaway" }, { 0x14, 0x14, "Program Resumption" }, { 0x15, 0x15, "Program Runover Planned" }, { 0x16, 0x16, "Program Runover Unplanned" }, { 0x17, 0x17, "Program Overlap Start" }, { 0x20, 0x20, "Chapter Start" }, { 0x21, 0x21, "Chapter End" }, { 0x30, 0x30, "Provider Advertisement Start" }, { 0x31, 0x31, "Provider Advertisement End" }, { 0x32, 0x32, "Distributor Advertisement Start" }, { 0x33, 0x33, "Distributor Advertisement End" }, { 0x34, 0x34, "Placement Opportunity Start" }, { 0x35, 0x35, "Placement Opportunity End" }, { 0x40, 0x40, "Unscheduled Event Start" }, { 0x41, 0x41, "Unscheduled Event End" }, { 0, 0, NULL } }; static const range_string rv_encryption_algorithm[] = { { 0x00, 0x00, "No encryption"}, { 0x01, 0x01, "DES - ECB mode"}, { 0x02, 0x02, "DES - CBC mode"}, { 0x03, 0x03, "Triple DES EDE3 - ECB mode"}, { 0x04, 0x1F, "Reserved"}, { 0x20, 0x3F, "User private"}, { 0, 0, NULL } }; /* time_signal dissector */ static int dissect_scte35_time_signal(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_) { gint tvb_len, min_length = 1, offset = 0; guint8 time_specified_flag; proto_item *ti; proto_tree *time_tree; /* Check packet length. */ tvb_len = (gint)tvb_reported_length(tvb); if (tvb_len < min_length) return 0; time_specified_flag = tvb_get_guint8(tvb, offset) & 0x80; if (time_specified_flag) min_length += 4; if (tvb_len < min_length) return 0; /* Set up headers in the packet list */ col_add_fstr(pinfo->cinfo, COL_INFO, "Time Signal (%s)", time_specified_flag ? "Future" : "Immediate"); /* Create a subtee for the time_signal */ ti = proto_tree_add_item(tree, proto_scte35_time, tvb, 0, -1, ENC_NA); time_tree = proto_item_add_subtree(ti, ett_scte35_time_signal); /* Parse out the fields. */ proto_tree_add_item(time_tree, hf_time_specified, tvb, offset, 1, ENC_BIG_ENDIAN); proto_tree_add_item(time_tree, hf_time_reserved, tvb, offset, 1, ENC_BIG_ENDIAN); if (time_specified_flag) { proto_tree_add_item(time_tree, hf_time_pts, tvb, offset, 5, ENC_BIG_ENDIAN); offset += 4; } offset += 1; return offset; } void proto_register_scte35_time_signal(void) { static gint *ett[] = { &ett_scte35_time_signal, &ett_scte35_time_signal_splice_time, }; static hf_register_info hf[] = { {&hf_time_specified, {"Time Specified", "scte35_time.splice.time_specified", FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL}}, {&hf_time_reserved, {"Reserved", "scte35_time.splice.reserved", FT_UINT8, BASE_HEX, NULL, 0x7E, NULL, HFILL}}, {&hf_time_pts, {"PTS Time", "scte35_time.splice.pts", FT_UINT64, BASE_DEC, NULL, G_GUINT64_CONSTANT(0x1FFFFFFFF), NULL, HFILL}}, }; proto_scte35_time = proto_register_protocol("SCTE-35 Time Signal", "SCTE35 TS", "scte35_time"); proto_register_subtree_array(ett, array_length(ett)); proto_register_field_array(proto_scte35_time, hf, array_length(hf)); } void proto_reg_handoff_scte35_time_signal(void) { dissector_handle_t scte35_time_handle; /* Create a dissector for time_signal packets. */ scte35_time_handle = create_dissector_handle(dissect_scte35_time_signal, proto_scte35_time); /* And hook it up to SCTE-35 messages. */ dissector_add_uint("scte35.splice_command_type", SCTE35_CMD_TIME_SIGNAL, scte35_time_handle); } /* scte35 private_command dissector */ static int dissect_scte35_private_command(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_) { gint tvb_len; guint32 identifier; gint offset = 0; proto_item *ti; proto_tree *pc_tree; tvb_len = (gint)tvb_reported_length(tvb); if (tvb_len < 4) return 0; /* Display rudimentary header information. */ ti = proto_tree_add_item(tree, proto_private_command, tvb, 0, -1, ENC_NA); pc_tree = proto_item_add_subtree(ti, ett_private_command); proto_tree_add_item_ret_uint(pc_tree, hf_identifier, tvb, offset, 4, ENC_BIG_ENDIAN, &identifier); col_add_fstr(pinfo->cinfo, COL_INFO, "Private Command (0x%08x)", identifier); offset += 4; proto_tree_add_item(pc_tree, hf_private_byte, tvb, offset, -1, ENC_NA); /* Let another dissector try to decode this data. */ dissector_try_uint(private_identifier_table, identifier, tvb, pinfo, tree); return tvb_len; } void proto_register_scte35_private_command(void) { static gint *ett[] = { &ett_private_command, }; static hf_register_info hf[] = { {&hf_identifier, {"Identifier", "scte35_private_command.identifier", FT_UINT32, BASE_HEX, NULL, 0, NULL, HFILL}}, {&hf_private_byte, {"Private Bytes", "scte35_private_command.private_byte", FT_BYTES, 0, NULL, 0, NULL, HFILL}}, }; proto_private_command = proto_register_protocol("SCTE-35 Private Command", "SCTE35 PC", "scte35_private_command"); proto_register_subtree_array(ett, array_length(ett)); proto_register_field_array(proto_private_command, hf, array_length(hf)); /* Allow other modules to hook private commands and decode them. */ private_identifier_table = register_dissector_table( "scte35_private_command.identifier", "SCTE-35 Private Command Identifier", proto_private_command, FT_UINT32, BASE_HEX); } void proto_reg_handoff_scte35_private_command(void) { dissector_handle_t scte35_private_command_handle; /* Create a dissector for private commands. */ scte35_private_command_handle = create_dissector_handle(dissect_scte35_private_command, proto_private_command); /* Trigger our dissector on any private_command SCTE-35 messages. */ dissector_add_uint("scte35.splice_command_type", SCTE35_CMD_PRIVATE_COMMAND, scte35_private_command_handle); } /* scte35 splice_insert dissector */ static int dissect_component(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, guint8 sif, int idx) { gint offset = 0; guint8 component_tag, tsf; proto_tree *component_tree; gint tvb_len, min_length = sif ? 1 : 2; tvb_len = (gint)tvb_reported_length(tvb); if (tvb_len < min_length) return 0; if (!sif) { /* Check whether time is present in the component. */ tsf = tvb_get_guint8(tvb, offset + 1) & 0x80; if (tsf) { min_length += 4; if (tvb_len < min_length) return 0; } } /* Create a subtree for the component. */ component_tag = tvb_get_guint8(tvb, offset); proto_tree_add_subtree_format( tree, tvb, offset, min_length, idx, &component_tree, "Component %d (0x%02x)", idx, component_tag); /* Parse out component flags. */ proto_tree_add_item(component_tree, hf_component_tag, tvb, offset, 1, ENC_BIG_ENDIAN); offset++; /* For non-immediate splices.. */ if (!sif) { proto_tree_add_item(component_tree, hf_component_splice_time_tsf, tvb, offset, 1, ENC_BIG_ENDIAN); proto_tree_add_item(component_tree, hf_component_splice_time_reserved, tvb, offset, 1, ENC_BIG_ENDIAN); /* And the PTS if present. */ if (tsf) { proto_tree_add_item(component_tree, hf_component_splice_time_pts_time, tvb, offset, 5, ENC_BIG_ENDIAN); offset += 4; } offset++; } return offset; } static int dissect_scte35_splice_insert(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_) { gint tvb_len, min_length = 5, dissected_length; guint8 cancel_flag, psf, df, sif, tsf, component_count; guint32 event_id; gint component; gint offset = 0; proto_item *ti; proto_tree *si_tree, *st_tree; static const int *new_event_fields[] = { &hf_out_of_network_indicator, &hf_program_splice_flag, &hf_duration_flag, &hf_splice_immediate_flag, &hf_reserved1, NULL }; /* Check with no optional subfields */ tvb_len = (gint)tvb_reported_length(tvb); if (tvb_len < min_length) return 0; cancel_flag = tvb_get_guint8(tvb, offset + 4) & 0x80; event_id = tvb_get_ntohl(tvb, 0); if (!cancel_flag) { min_length += 5; if (tvb_len < min_length) return 0; } /* Set up headers in the packet list */ col_add_fstr(pinfo->cinfo, COL_INFO, "Splice %s Event 0x%08x", cancel_flag ? "Cancellation" : "Insertion", event_id); /* Create a root tree element for the splice_insert protocol. */ ti = proto_tree_add_item(tree, proto_scte35_si, tvb, 0, -1, ENC_NA); si_tree = proto_item_add_subtree(ti, ett_scte35_splice_insert); /* Parse header fields */ proto_tree_add_item(si_tree, hf_splice_insert_event_id, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; proto_tree_add_item(si_tree, hf_splice_cancel_indicator, tvb, offset, 1, ENC_BIG_ENDIAN); proto_tree_add_item(si_tree, hf_reserved0, tvb, offset, 1, ENC_BIG_ENDIAN); offset++; /* Check for a new event. */ if (!cancel_flag) { /* Parse out the 'new event' fields. */ psf = tvb_get_guint8(tvb, offset) & 0x40; df = tvb_get_guint8(tvb, offset) & 0x20; sif = tvb_get_guint8(tvb, offset) & 0x10; proto_tree_add_bitmask_list(si_tree, tvb, offset, 1, new_event_fields, ENC_BIG_ENDIAN); offset++; /* Parse out the program-level splice fields. */ if (psf && !sif) { min_length += 1; if (tvb_len < min_length) return offset; tsf = tvb_get_bits8(tvb, offset * 8, 1); proto_tree_add_subtree(si_tree, tvb, offset, tsf ? 5 : 1, 0, &st_tree, "Program Splice Time"); proto_tree_add_item(st_tree, hf_splice_time_specified_flag, tvb, offset, 1, ENC_BIG_ENDIAN); proto_tree_add_item(st_tree, hf_splice_time_reserved, tvb, offset, 1, ENC_BIG_ENDIAN); /* If a time is specified, display it too. */ if (tsf) { min_length += 4; if (tvb_len < min_length) return offset; proto_tree_add_item(st_tree, hf_splice_time_pts_time, tvb, offset, 5, ENC_BIG_ENDIAN); offset += 4; } offset++; } /* For component-level splices, parse the component table. */ if (!psf) { min_length += 1; if (tvb_len < min_length) return offset; component_count = tvb_get_guint8(tvb, offset); proto_tree_add_item(si_tree, hf_component_count, tvb, offset, 1, ENC_BIG_ENDIAN); offset++; min_length += component_count * (sif ? 1 : 2); if (tvb_len < min_length) return offset; /* Dissect each splice component. */ for (component = 0; component < component_count; ++component) { dissected_length = dissect_component( tvb_new_subset_remaining(tvb, offset), pinfo, si_tree, sif, component); /* Propagate failures. */ if (dissected_length < 1) return offset; offset += dissected_length; } } /* If present, parse out the duration field. */ if (df) { min_length += 5; if (tvb_len < min_length) return offset; proto_tree_add_item(si_tree, hf_break_duration_auto_return, tvb, offset, 1, ENC_BIG_ENDIAN); proto_tree_add_item(si_tree, hf_break_duration_reserved, tvb, offset, 1, ENC_BIG_ENDIAN); proto_tree_add_item(si_tree, hf_break_duration_duration, tvb, offset, 5, ENC_BIG_ENDIAN); offset += 5; } /* Parse the UPID and avails fields. */ proto_tree_add_item(si_tree, hf_unique_program_id, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(si_tree, hf_avail_num, tvb, offset, 1, ENC_BIG_ENDIAN); offset++; proto_tree_add_item(si_tree, hf_avails_expected, tvb, offset, 1, ENC_BIG_ENDIAN); offset++; } return offset; } void proto_register_scte35_splice_insert(void) { static hf_register_info hf[] = { {&hf_splice_insert_event_id, {"Event ID", "scte35_si.event_id", FT_UINT32, BASE_HEX, NULL, 0, NULL, HFILL}}, {&hf_splice_cancel_indicator, {"Cancelled", "scte35_si.cancelled", FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL}}, {&hf_reserved0, {"Reserved", "scte35_si.reserved0", FT_UINT8, 1, NULL, 0x7F, NULL, HFILL}}, {&hf_out_of_network_indicator, {"Out of Network", "scte35_si.out_of_net", FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL}}, {&hf_program_splice_flag, {"Program Splice Point", "scte35_si.psf", FT_BOOLEAN, 8, NULL, 0x40, NULL, HFILL}}, {&hf_duration_flag, {"Duration Present", "scte35_si.duration_flag", FT_BOOLEAN, 8, NULL, 0x20, NULL, HFILL}}, {&hf_splice_immediate_flag, {"Splice Immediate", "scte35_si.splice_immediate", FT_BOOLEAN, 8, NULL, 0x10, NULL, HFILL}}, {&hf_reserved1, {"Reserved", "scte35_si.reserved1", FT_UINT8, 1, NULL, 0x0f, NULL, HFILL}}, {&hf_splice_time_specified_flag, {"Time Specified", "scte35_si.splice_time.time_specified", FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL}}, {&hf_splice_time_reserved, {"Reserved", "scte35_si.splice_time.reserved", FT_UINT8, 1, NULL, 0x7E, NULL, HFILL}}, {&hf_splice_time_pts_time, {"PTS Time", "scte35_si.splice_time.pts", FT_UINT64, 5, NULL, G_GUINT64_CONSTANT(0x1FFFFFFFF), NULL, HFILL}}, {&hf_component_count, {"Component Count", "scte35_si.component_count", FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL}}, {&hf_component_tag, {"Component Tag", "scte35_si.component.tag", FT_UINT8, BASE_HEX, NULL, 0, NULL, HFILL}}, {&hf_component_splice_time_tsf, {"Time Specified", "scte35_si.component.time_specified", FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL}}, {&hf_component_splice_time_reserved, {"Reserved", "scte35_si.component.reserved", FT_UINT8, 1, NULL, 0x7E, NULL, HFILL}}, {&hf_component_splice_time_pts_time, {"PTS Time", "scte35_si.component.pts", FT_UINT64, 5, NULL, G_GUINT64_CONSTANT(0x1FFFFFFFF), NULL, HFILL}}, {&hf_break_duration_auto_return, {"Auto Return", "scte35_si.break.auto_return", FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL}}, {&hf_break_duration_reserved, {"Reserved", "scte35_si.break.reserved", FT_UINT8, 1, NULL, 0x7E, NULL, HFILL}}, {&hf_break_duration_duration, {"Duration", "scte35_si.break.duration", FT_UINT64, 5, NULL, G_GUINT64_CONSTANT(0x1FFFFFFFF), NULL, HFILL}}, {&hf_unique_program_id, {"Unique Program ID", "scte35_si.upid", FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL}}, {&hf_avail_num, {"Avail Number", "scte35_si.avail", FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL}}, {&hf_avails_expected, {"Avails Expected", "scte35_si.avails_expected", FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL}}, }; static gint *ett[] = { &ett_scte35_splice_insert, }; proto_scte35_si = proto_register_protocol("SCTE-35 Splice Insert", "SCTE35 SI", "scte35_si"); proto_register_subtree_array(ett, array_length(ett)); proto_register_field_array(proto_scte35_si, hf, array_length(hf)); } void proto_reg_handoff_scte35_splice_insert(void) { dissector_handle_t scte35_si_handle; /* Create a splice_insert dissector, and hook it into SCTE35 parsing. */ scte35_si_handle = create_dissector_handle(dissect_scte35_splice_insert, proto_scte35_si); dissector_add_uint("scte35.splice_command_type", SCTE35_CMD_SPLICE_INSERT, scte35_si_handle); } /* scte35 splice_schedule dissector */ static int dissect_scte35_splice_schedule(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_) { gint tvb_len, min_length = 1; guint8 splice_count, cancel_flag, psf, df, component_count; gint component, splice; gint offset = 0, splice_length; proto_item *ti; proto_tree *ss_tree, *sp_tree, *component_tree; static const int *splice_event_flags[] = { &hf_splice_out_of_network, &hf_splice_program_splice_flag, &hf_splice_duration_flag, &hf_splice_reserved1, NULL }; /* Check with no optional subfields */ tvb_len = (gint)tvb_reported_length(tvb); if (tvb_len < min_length) return 0; /* Set up headers in the packet list */ splice_count = tvb_get_guint8(tvb, 0); min_length += splice_count * 5; if (tvb_len < min_length) return 0; col_add_fstr(pinfo->cinfo, COL_INFO, "Splice Schedule (%d splices)", splice_count); /* Create the root of the dissection */ ti = proto_tree_add_item(tree, proto_scte35_splice_schedule, tvb, 0, -1, ENC_NA); ss_tree = proto_item_add_subtree(ti, ett_scte35_splice_schedule); /* Header fields for splice_schedule() message */ proto_tree_add_item(ss_tree, hf_splice_count, tvb, offset, 1, ENC_NA); offset++; /* Process each splice. */ for (splice = 0; splice < splice_count; ++splice) { cancel_flag = tvb_get_bits8(tvb, offset * 8 + 32, 1); psf = cancel_flag ? 0 : tvb_get_bits8(tvb, offset * 8 + 41, 1); df = cancel_flag ? 0 : tvb_get_bits8(tvb, offset * 8 + 42, 1); component_count = cancel_flag ? 0 : (psf ? 0 : tvb_get_guint8(tvb, offset + 6)); splice_length = 5; if (!cancel_flag) splice_length += 4 + 1; if (!cancel_flag && psf) splice_length += 4; if (!cancel_flag && !psf) splice_length += 1 + 5 * component_count; if (!cancel_flag && df) splice_length += 5; /* Add a subtree for the splice. */ proto_tree_add_subtree_format( ss_tree, tvb, offset, splice_length, splice, &sp_tree, "Splice %d", splice); /* Show the splice header. */ proto_tree_add_item(ss_tree, hf_splice_event_id, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; proto_tree_add_item(ss_tree, hf_splice_event_cancel_indicator, tvb, offset, 1, ENC_BIG_ENDIAN); proto_tree_add_item(ss_tree, hf_splice_reserved0, tvb, offset, 1, ENC_BIG_ENDIAN); offset++; if (!cancel_flag) { min_length += 5; if (tvb_len < min_length) return offset; df = tvb_get_bits8(tvb, offset * 8 + 2, 1); /* Parse out the splice event flags. */ proto_tree_add_bitmask_list(ss_tree, tvb, offset, 1, splice_event_flags, ENC_BIG_ENDIAN); offset++; min_length += (psf ? 4 : 1); if (tvb_len < min_length) return offset; if (psf) { proto_tree_add_item(ss_tree, hf_splice_utc_splice_time, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; } else { component_count = tvb_get_guint8(tvb, offset); proto_tree_add_item(ss_tree, hf_splice_component_count, tvb, offset, 1, ENC_NA); offset++; min_length += 5 * component_count; if (tvb_len < min_length) return offset; /* Parse out each component stream. */ for (component = 0; component < component_count; ++component) { proto_tree_add_subtree_format(sp_tree, tvb, offset, 5, component, &component_tree, "Component %d", component); proto_tree_add_item(component_tree, hf_splice_component_tag, tvb, offset, 1, ENC_NA); offset++; proto_tree_add_item(component_tree, hf_splice_component_utc_splice_time, tvb, offset, 4, ENC_NA); offset += 4; } } /* Parse out break duration, if present. */ if (df) { min_length += 5; if (tvb_len < min_length) return offset; proto_tree_add_item(ss_tree, hf_splice_break_duration_auto_return, tvb, offset, 1, ENC_BIG_ENDIAN); proto_tree_add_item(ss_tree, hf_splice_break_duration_reserved, tvb, offset, 1, ENC_BIG_ENDIAN); proto_tree_add_item(ss_tree, hf_splice_break_duration_duration, tvb, offset, 5, ENC_BIG_ENDIAN); offset += 5; } } proto_tree_add_item(ss_tree, hf_splice_unique_program_id, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(ss_tree, hf_splice_avail_num, tvb, offset, 1, ENC_BIG_ENDIAN); offset++; proto_tree_add_item(ss_tree, hf_splice_avails_expected, tvb, offset, 1, ENC_BIG_ENDIAN); offset++; } return offset; } void proto_register_scte35_splice_schedule(void) { static hf_register_info hf[] = { {&hf_splice_count, {"Splice Count", "scte35_splice_schedule.splice_count", FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL}}, {&hf_splice_event_id, {"Event ID", "scte35_splice_schedule.splice.event_id", FT_UINT32, BASE_HEX, NULL, 0, NULL, HFILL}}, {&hf_splice_event_cancel_indicator, {"Event Cancel Indicator", "scte35_splice_schedule.splice.event_cancel_indicator", FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL}}, {&hf_splice_reserved0, {"Reserved", "scte35_splice_schedule.splice.reserved0", FT_UINT8, BASE_HEX, NULL, 0x7F, NULL, HFILL}}, {&hf_splice_out_of_network, {"Out of Network Indicator", "scte35_splice_schedule.splice.out_of_network_indicator", FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL}}, {&hf_splice_program_splice_flag, {"Program Splice Flag", "scte35_splice_schedule.splice.program_splice_flag", FT_BOOLEAN, 8, NULL, 0x40, NULL, HFILL}}, {&hf_splice_duration_flag, {"Duration Flag", "scte35_splice_schedule.splice.duration_flag", FT_BOOLEAN, 8, NULL, 0x20, NULL, HFILL}}, {&hf_splice_reserved1, {"Reserved", "scte35_splice_schedule.splice.reserved1", FT_UINT8, BASE_HEX, NULL, 0x1F, NULL, HFILL}}, {&hf_splice_utc_splice_time, {"UTC Splice Time", "scte35_splice_schedule.splice.utc_splice_time", FT_UINT32, BASE_DEC, NULL, 0, NULL, HFILL}}, {&hf_splice_component_count, {"Component Count", "scte35_splice_schedule.splice.component_count", FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL}}, {&hf_splice_component_tag, {"Component Tag", "scte35_splice_schedule.splice.component.tag", FT_UINT8, BASE_HEX, NULL, 0, NULL, HFILL}}, {&hf_splice_component_utc_splice_time, {"UTC Splice Time", "scte35_splice_schedule.splice.component.utc_splice_time", FT_UINT32, BASE_DEC, NULL, 0, NULL, HFILL}}, {&hf_splice_break_duration_auto_return, {"Auto Return", "scte35_splice_schedule.splice.break_duration.auto_return", FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL}}, {&hf_splice_break_duration_reserved, {"Reserved", "scte35_splice_schedule.splice.break_duration.reserved", FT_UINT8, BASE_HEX, NULL, 0x7E, NULL, HFILL}}, {&hf_splice_break_duration_duration, {"Duration", "scte35_splice_schedule.splice.break_duration.duration", FT_UINT64, BASE_DEC, NULL, G_GUINT64_CONSTANT(0x1FFFFFFFF), NULL, HFILL}}, {&hf_splice_unique_program_id, {"Unique Program ID", "scte35_splice_schedule.splice.unique_program_id", FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL}}, {&hf_splice_avail_num, {"Avail Number", "scte35_splice_schedule.splice.avail_num", FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL}}, {&hf_splice_avails_expected, {"Avails Expected", "scte35_splice_schedule.splice.avails_expected", FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL}}, }; static gint *ett[] = { &ett_scte35_splice_schedule, }; proto_scte35_splice_schedule = proto_register_protocol("SCTE-35 Splice Schedule", "SCTE35 SS", "scte35_splice_schedule"); proto_register_subtree_array(ett, array_length(ett)); proto_register_field_array(proto_scte35_splice_schedule, hf, array_length(hf)); } void proto_reg_handoff_scte35_splice_schedule(void) { dissector_handle_t dissector; dissector = create_dissector_handle(dissect_scte35_splice_schedule, proto_scte35_splice_schedule); dissector_add_uint("scte35.splice_command_type", SCTE35_CMD_SPLICE_SCHEDULE, dissector); } /* core scte35 splice_info_section dissector */ static int dissect_scte35_avail_descriptor(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree) { gint offset = 0; gint tvb_len; /* Check length. */ tvb_len = (gint)tvb_reported_length(tvb); if (tvb_len < 4) return 0; /* Show the field. */ proto_tree_add_item(tree, hf_descriptor_provider_avail_id, tvb, offset, 4, ENC_NA); offset += 4; return offset; } static int dissect_scte35_dtmf_descriptor(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree) { gint offset = 0; gint tvb_len, min_length = 2; guint8 dtmf_count; /* Check length. */ tvb_len = (gint)tvb_reported_length(tvb); if (tvb_len < min_length) return 0; dtmf_count = tvb_get_bits8(tvb, (offset+1)* 8, 3); /* Check length with DTMF string too. */ min_length += dtmf_count; if (tvb_len < min_length) return 0; /* Describe header. */ proto_tree_add_item(tree, hf_descriptor_preroll, tvb, offset, 1, ENC_NA); offset++; proto_tree_add_item(tree, hf_descriptor_dtmf_count, tvb, offset, 1, ENC_NA); proto_tree_add_item(tree, hf_descriptor_dtmf_reserved, tvb, offset, 1, ENC_NA); offset++; /* Show the DTMF string field. */ proto_tree_add_item(tree, hf_descriptor_dtmf, tvb, offset, dtmf_count, ENC_NA | ENC_ASCII); offset += dtmf_count; return offset; } static int dissect_scte35_component(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, int idx) { gint offset = 0; proto_tree *subtree; /* Create the subtree. */ proto_tree_add_subtree_format(tree, tvb, offset, 6, idx, &subtree, "Component %d", idx); /* Display the component fields. */ proto_tree_add_item(subtree, hf_descriptor_component_tag, tvb, offset, 1, ENC_NA); offset++; proto_tree_add_item(subtree, hf_descriptor_component_reserved, tvb, offset, 1, ENC_NA); proto_tree_add_item(subtree, hf_descriptor_component_pts_offset, tvb, offset, 5, ENC_BIG_ENDIAN); offset += 5; return offset; } static int dissect_scte35_segmentation_descriptor(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { gint offset = 0, dissected_length = 0, component; guint8 cancel_indicator, psf, sdf, dnr, component_count, upid_length; /* Parse the common header */ proto_tree_add_item(tree, hf_descriptor_event_id, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; cancel_indicator = tvb_get_bits8(tvb, offset * 8, 1); proto_tree_add_item(tree, hf_descriptor_cancel_indicator, tvb, offset, 1, ENC_NA); proto_tree_add_item(tree, hf_descriptor_reserved0, tvb, offset, 1, ENC_NA); offset++; /* Parse fields for new segmentation events. */ if (!cancel_indicator) { psf = tvb_get_bits8(tvb, offset * 8, 1); sdf = tvb_get_bits8(tvb, offset * 8 + 1, 1); dnr = tvb_get_bits8(tvb, offset * 8 + 2, 1); proto_tree_add_item(tree, hf_descriptor_psf, tvb, offset, 1, ENC_NA); proto_tree_add_item(tree, hf_descriptor_segmentation_duration_flag, tvb, offset, 1, ENC_NA); proto_tree_add_item(tree, hf_descriptor_delivery_not_restricted_flag, tvb, offset, 1, ENC_NA); /* Parse delivery flags */ if (dnr) { proto_tree_add_item(tree, hf_descriptor_reserved1, tvb, offset, 1, ENC_NA); } else { proto_tree_add_item(tree, hf_descriptor_web_delivery_allowed_flag, tvb, offset, 1, ENC_NA); proto_tree_add_item(tree, hf_descriptor_no_regional_blackout_flag, tvb, offset, 1, ENC_NA); proto_tree_add_item(tree, hf_descriptor_archive_allow_flag, tvb, offset, 1, ENC_NA); proto_tree_add_item(tree, hf_descriptor_device_restrictions, tvb, offset, 1, ENC_NA); } offset++; /* Parse component segmentation offsets if not switched as a program. */ if (!psf) { component_count = tvb_get_guint8(tvb, offset); proto_tree_add_item(tree, hf_descriptor_component_count, tvb, offset, 1, ENC_NA); offset++; /* Parse each component */ for (component = 0; component < component_count; ++component) { dissected_length = dissect_scte35_component( tvb_new_subset_length(tvb, offset, 6), pinfo, tree, component); /* Propagate errors. */ if (dissected_length < 1) return dissected_length; offset += dissected_length; } } /* Parse segementation duration if present. */ if (sdf) { proto_tree_add_item(tree, hf_descriptor_segmentation_duration, tvb, offset, 5, ENC_BIG_ENDIAN); offset += 5; } /* Parse UPID. */ proto_tree_add_item(tree, hf_descriptor_segmentation_upid_type, tvb, offset, 1, ENC_NA); offset++; upid_length = tvb_get_guint8(tvb, offset); proto_tree_add_item(tree, hf_descriptor_segmentation_upid_length, tvb, offset, 1, ENC_NA); offset++; /* Only show non-empty UPIDs. */ if (upid_length) { proto_tree_add_item(tree, hf_descriptor_segmentation_upid, tvb, offset, upid_length, ENC_NA | ENC_ASCII); offset += upid_length; } /* Parse Segment counts. */ proto_tree_add_item(tree, hf_descriptor_segmentation_type_id, tvb, offset, 1, ENC_NA); offset++; proto_tree_add_item(tree, hf_descriptor_segment_num, tvb, offset, 1, ENC_NA); offset++; proto_tree_add_item(tree, hf_descriptor_segments_expected, tvb, offset, 1, ENC_NA); offset++; } return offset; } static int dissect_scte35_splice_descriptor(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int idx) { proto_tree *subtree; tvbuff_t *descriptor_tvb; gint offset = 0, dissected_length = 0; guint8 tag, length = 0; /* Create the subtree header for the descriptor. */ tag = tvb_get_guint8(tvb, offset); length = tvb_get_guint8(tvb, offset + 1); proto_tree_add_subtree_format( tree, tvb, offset, length + 2, idx, &subtree, "Descriptor %d (0x%02x)", idx, tag); /* Parse descriptor headers */ proto_tree_add_item(subtree, hf_splice_descriptor_tag, tvb, offset, 1, ENC_NA); offset++; proto_tree_add_item(subtree, hf_splice_descriptor_length, tvb, offset, 1, ENC_NA); offset++; proto_tree_add_item(subtree, hf_splice_descriptor_identifier, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; /* Parse the specific descriptor type. */ descriptor_tvb = tvb_new_subset_length(tvb, offset, length - 4); switch (tag) { case SCTE35_AVAIL_DESCRIPTOR: dissected_length = dissect_scte35_avail_descriptor(descriptor_tvb, pinfo, subtree); break; case SCTE35_DTMF_DESCRIPTOR: dissected_length = dissect_scte35_dtmf_descriptor(descriptor_tvb, pinfo, subtree); break; case SCTE35_SEGMENTATION_DESCRIPTOR: dissected_length = dissect_scte35_segmentation_descriptor(descriptor_tvb, pinfo, subtree); break; default: /* Just trust the descriptor_length field. */ dissected_length = length - 4; } /* Propagate errors. */ if (dissected_length < 1) return dissected_length; offset += dissected_length; return offset; } static int dissect_scte35_splice_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_) { gint tvb_len, min_length = SCTE35_SI_MIN_LEN, dissected_length = 0; guint8 table_id, encrypted_packet, command_type; guint16 command_length, descriptor_loop_length, i; proto_item *ti; proto_tree *splice_info_tree; gint offset = 0, descriptor_offset = 0; tvbuff_t *command_tvb; const gint *section_flags[] = { &hf_section_syntax_indicator, &hf_private_indicator, &hf_reserved, &hf_section_length, NULL }; const gint *encrypt_flags[] = { &hf_encrypted_packet, &hf_encryption_algorithm, &hf_pts_adjustment, NULL }; tvb_len = (gint)tvb_reported_length(tvb); if (tvb_len < min_length) return 0; /* Pre-fetch a few fields in the message. */ table_id = tvb_get_guint8(tvb, offset); encrypted_packet = tvb_get_guint8(tvb, offset + 4) & 0x80; command_type = tvb_get_guint8(tvb, offset + 13); command_length = tvb_get_ntohs(tvb, offset + 11) & 0xFFF; /* Check for excessive length before indexing past the command. */ min_length += command_length; if (tvb_len < min_length) return 0; /* Determine length of descriptors. */ descriptor_loop_length = tvb_get_ntohs(tvb, 14 + command_length); min_length += descriptor_loop_length; if (tvb_len < min_length) return 0; /* Check for excessive length before parsing the remainder of the packet. */ if (encrypted_packet) min_length += 4; if (tvb_len < min_length) return 0; /* Set up headers in the packet list */ col_set_str(pinfo->cinfo, COL_PROTOCOL, "SCTE-35"); col_add_fstr(pinfo->cinfo, COL_INFO, "Table 0x%02x", table_id); /* Create the protocol header. */ ti = proto_tree_add_item(tree, proto_scte35, tvb, 0, -1, ENC_NA); splice_info_tree = proto_item_add_subtree(ti, ett_scte35_splice_info_section); /* Explain the root fields. */ proto_tree_add_item(splice_info_tree, hf_table_id, tvb, offset, 1, ENC_BIG_ENDIAN); offset++; proto_tree_add_bitmask_list(splice_info_tree, tvb, offset, 2, section_flags, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(splice_info_tree, hf_protocol_version, tvb, offset, 1, ENC_BIG_ENDIAN); offset++; /* 7 bits of flags, 33 bits of PTS */ proto_tree_add_bitmask_list(splice_info_tree, tvb, offset, 5, encrypt_flags, ENC_BIG_ENDIAN); offset += 5; proto_tree_add_item(splice_info_tree, hf_cw_index, tvb, offset, 1, ENC_BIG_ENDIAN); offset++; /* Two twelve-bit fields */ proto_tree_add_item(splice_info_tree, hf_tier, tvb, offset, 2, ENC_BIG_ENDIAN); offset++; proto_tree_add_item(splice_info_tree, hf_splice_command_length, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(splice_info_tree, hf_splice_command_type, tvb, offset, 1, ENC_BIG_ENDIAN); offset++; /* Extract the splice command payload for later use. */ command_tvb = tvb_new_subset_length(tvb, offset, command_length); offset += command_length; /* Process the descriptor loop. */ proto_tree_add_item(splice_info_tree, hf_descriptor_loop_length, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; /* Explain each descriptor. */ for (i = 0, descriptor_offset = offset; descriptor_offset < offset + descriptor_loop_length; ++i) { dissected_length = dissect_scte35_splice_descriptor( tvb_new_subset_remaining(tvb, descriptor_offset), pinfo, splice_info_tree, i); /* Escalate failure. */ if (dissected_length < 1) return offset; descriptor_offset += dissected_length; } offset += descriptor_loop_length; /* Explain the packet footer. */ if (encrypted_packet) { proto_tree_add_item(splice_info_tree, hf_e_crc32, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; } proto_tree_add_item(splice_info_tree, hf_crc32, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; /* We've reached the end. Run a child dissector for the splice command. */ dissector_try_uint_new(scte35_cmd_dissector_table, command_type, command_tvb, pinfo, tree, FALSE, NULL); return offset; } void proto_register_scte35(void) { static gint *ett[] = { &ett_scte35_splice_info_section, }; static hf_register_info hf[] = { /* MPEG Section Table Headers. Field members taken from mpeg-sect.c. */ {&hf_table_id, {"Table ID", "scte35.tid", FT_UINT8, BASE_HEX, NULL, 0, NULL, HFILL}}, {&hf_section_syntax_indicator, {"Section Syntax Identifier", "scte35.syntax_indicator", FT_BOOLEAN, 16, TFS(&tfs_section_syntax_indicator), 0x8000, NULL, HFILL }}, {&hf_private_indicator, {"Private Indicator", "scte35.private", FT_BOOLEAN, 16, TFS(&tfs_private_indicator), 0x4000, NULL, HFILL }}, {&hf_reserved, {"Reserved", "scte35.reserved", FT_UINT16, BASE_HEX, NULL, 0x3000, NULL, HFILL }}, {&hf_section_length, {"Section length", "scte35.len", FT_UINT16, BASE_DEC, NULL, 0x0FFF, NULL, HFILL}}, /* SCTE35-specific headers */ {&hf_protocol_version, {"Protocol Version", "scte35.protocol_version", FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL}}, {&hf_encrypted_packet, {"Encrypted Packet", "scte35.encrypted_packet", FT_BOOLEAN, 40, TFS(&tfs_encrypted_packet), G_GUINT64_CONSTANT(0x8000000000), NULL, HFILL}}, {&hf_encryption_algorithm, {"Encryption Algorithm", "scte35.encryption_algorithm", FT_UINT40, BASE_HEX | BASE_RANGE_STRING, RVALS(rv_encryption_algorithm), G_GUINT64_CONSTANT(0x7E00000000), NULL, HFILL}}, {&hf_pts_adjustment, {"PTS Adjustment", "scte35.pts_adjustment", FT_UINT40, BASE_DEC, NULL, G_GUINT64_CONSTANT(0x1FFFFFFFF), NULL, HFILL}}, {&hf_cw_index, {"Control Word Index", "scte35.cw_index", FT_UINT8, BASE_HEX, NULL, 0, NULL, HFILL}}, {&hf_tier, {"Authorisation Tier", "scte35.tier", FT_UINT16, BASE_DEC, NULL, 0xFFF0, NULL, HFILL}}, {&hf_splice_command_length, {"Command Length", "scte35.splice_command_length", FT_UINT16, BASE_DEC, NULL, 0xFFF, NULL, HFILL}}, {&hf_splice_command_type, {"Command Type", "scte35.splice_command_type", FT_UINT8, BASE_HEX | BASE_RANGE_STRING, RVALS(rv_splice_command_type), 0, NULL, HFILL}}, /* Splice command payload goes here via the dissector table. */ /* Descriptor loop header. */ {&hf_descriptor_loop_length, {"Descriptor Loop Length", "scte35.desc_len", FT_UINT16, BASE_DEC, NULL, 0, NULL, HFILL}}, /* Descriptor loop entries. */ {&hf_splice_descriptor_tag, {"Tag", "scte35.splice_descriptor.tag", FT_UINT8, BASE_HEX | BASE_RANGE_STRING, RVALS(rv_splice_descriptor_tag), 0, NULL, HFILL}}, {&hf_splice_descriptor_length, {"Length", "scte35.splice_descriptor.length", FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL}}, {&hf_splice_descriptor_identifier, {"Descriptor ID", "scte35.splice_descriptor.identifier", FT_UINT32, BASE_HEX, NULL, 0, NULL, HFILL}}, /* avail_descriptor */ {&hf_descriptor_provider_avail_id, {"Provider Avail ID", "scte35.splice_descriptor.provider_avail_id", FT_UINT32, BASE_HEX, NULL, 0, NULL, HFILL}}, /* dtmf_descriptor */ {&hf_descriptor_preroll, {"Preroll", "scte35.splice_descriptor.preroll", FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL}}, {&hf_descriptor_dtmf_count, {"DTMF Count", "scte35.splice_descriptor.dtmf_count", FT_UINT8, BASE_DEC, NULL, 0xE0, NULL, HFILL}}, {&hf_descriptor_dtmf_reserved, {"DTMF Reserved", "scte35.splice_descriptor.dtmf_reserved", FT_UINT8, BASE_HEX, NULL, 0x1F, NULL, HFILL}}, {&hf_descriptor_dtmf, {"DTMF", "scte35.splice_descriptor.dtmf", FT_STRING, 0, NULL, 0, NULL, HFILL}}, /* segmentation_descriptor */ {&hf_descriptor_event_id, {"Segmentation Event ID", "scte35.splice_descriptor.event_id", FT_UINT32, BASE_HEX, NULL, 0, NULL, HFILL}}, {&hf_descriptor_cancel_indicator, {"Cancel Indicator", "scte35.splice_descriptor.cancel_indicator", FT_BOOLEAN, 8, TFS(&tfs_descriptor_cancel_indicator), 0x80, NULL, HFILL}}, {&hf_descriptor_reserved0, {"Reserved", "scte35.splice_descriptor.reserved0", FT_UINT8, BASE_HEX, NULL, 0x7F, NULL, HFILL}}, {&hf_descriptor_psf, {"Program Segmentation Flag", "scte35.splice_descriptor.psf", FT_BOOLEAN, 8, TFS(&tfs_descriptor_psf), 0x80, NULL, HFILL}}, {&hf_descriptor_segmentation_duration_flag, {"Segmentation Duration Flag", "scte35.splice_descriptor.sdf", FT_BOOLEAN, 8, TFS(&tfs_descriptor_sdf), 0x40, NULL, HFILL}}, {&hf_descriptor_delivery_not_restricted_flag, {"Delivery not Restricted", "scte35.splice_descriptor.dnr", FT_BOOLEAN, 8, TFS(&tfs_descriptor_dnr), 0x20, NULL, HFILL}}, {&hf_descriptor_web_delivery_allowed_flag, {"Web Delivery Allowed", "scte35.splice_descriptor.web_delivery_allowed", FT_BOOLEAN, 8, TFS(&tfs_descriptor_web), 0x10, NULL, HFILL}}, {&hf_descriptor_no_regional_blackout_flag, {"No Regional Blackout", "scte35.splice_descriptor.no_regional_blackout", FT_BOOLEAN, 8, TFS(&tfs_descriptor_blackout), 0x08, NULL, HFILL}}, {&hf_descriptor_archive_allow_flag, {"Archive Allowed", "scte35.splice_descriptor.archive_allowed", FT_BOOLEAN, 8, TFS(&tfs_descriptor_archive), 0x04, NULL, HFILL}}, {&hf_descriptor_device_restrictions, {"Device Restrictions", "scte35.splice_descriptor.device_restrictions", FT_UINT8, BASE_HEX | BASE_RANGE_STRING, RVALS(scte35_device_restrictions), 0x03, NULL, HFILL}}, {&hf_descriptor_reserved1, {"Reserved", "scte35.splice_descriptor.reserved1", FT_UINT8, BASE_HEX, NULL, 0x1F, NULL, HFILL}}, {&hf_descriptor_component_count, {"Component Count", "scte35.splice_descriptor.component_count", FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL}}, {&hf_descriptor_component_tag, {"Component Tag", "scte35.splice_descriptor.component.tag", FT_UINT8, BASE_HEX, NULL, 0, NULL, HFILL}}, {&hf_descriptor_component_reserved, {"Reserved", "scte35.splice_descriptor.component.reserved", FT_UINT8, BASE_HEX, NULL, 0xFE, NULL, HFILL}}, {&hf_descriptor_component_pts_offset, {"PTS Offset", "scte35.splice_descriptor.component.pts_offset", FT_UINT64, BASE_DEC, NULL, 0x1FFFFFFFF, NULL, HFILL}}, {&hf_descriptor_segmentation_duration, {"Segmentation Duration", "scte35.splice_descriptor.segmentation_duration", FT_UINT64, BASE_DEC, NULL, 0xFFFFFFFFFF, NULL, HFILL}}, {&hf_descriptor_segmentation_upid_type, {"UPID Type", "scte35.splice_descriptor.upid_type", FT_UINT8, BASE_HEX | BASE_RANGE_STRING, RVALS(scte35_segmentation_upid_type), 0, NULL, HFILL}}, {&hf_descriptor_segmentation_upid_length, {"UPID Length", "scte35.splice_descriptor.upid_length", FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL}}, {&hf_descriptor_segmentation_upid, {"UPID", "scte35.splice_descriptor.upid", FT_STRING, 0, NULL, 0, NULL, HFILL}}, {&hf_descriptor_segmentation_type_id, {"Segmentation Type", "scte35.splice_descriptor.segmentation_type_id", FT_UINT8, BASE_HEX | BASE_RANGE_STRING, RVALS(scte35_segmentation_type_id), 0, NULL, HFILL}}, {&hf_descriptor_segment_num, {"Segment Number", "scte35.splice_descriptor.segment_num", FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL}}, {&hf_descriptor_segments_expected, {"Segments Expected", "scte35.splice_descriptor.segments_expected", FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL}}, /* Optional alignment padding, encrypted CRC32 suffix. */ {&hf_e_crc32, {"Encrypted CRC32", "scte35.ecrc32", FT_UINT32, BASE_HEX, NULL, 0, NULL, HFILL}}, /* MPEG Section table CRC suffix */ {&hf_crc32, {"CRC32", "scte35.crc", FT_UINT32, BASE_HEX, NULL, 0, NULL, HFILL}}, }; /* Allocate a protocol number. */ proto_scte35 = proto_register_protocol( "SCTE-35 Splice Information", /* name */ "SCTE 35", /* short name */ "scte35" /* abbreviation */ ); scte35_handle = register_dissector("scte35", dissect_scte35_splice_info, proto_scte35); /* Register groups and fields. */ proto_register_subtree_array(ett, array_length(ett)); proto_register_field_array(proto_scte35, hf, array_length(hf)); /* Allow other protocols to discriminate against the splice command type * to further dissect the payload. */ scte35_cmd_dissector_table = register_dissector_table( "scte35.splice_command_type", "SCTE-35 Command", proto_scte35, FT_UINT8, BASE_HEX); } void proto_reg_handoff_scte35(void) { /* Invoke the splice_info_section parser for a section table with ID 0xFC */ dissector_add_uint("mpeg_sect.tid", SCTE35_TABLE_ID, scte35_handle); } /* * Editor modelines - http://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: */