/* packet-citp.c

 * Routines for CITP packet disassembly

 *

 * Copyright (c) 2025 by Matt Morris <mattm.dev.1[AT]gmail.com>

 *

 * Wireshark - Network traffic analyzer

 * By Gerald Combs <gerald@wireshark.org>

 * Copyright 1999 Gerald Combs

 *

 * Specification:

 * https://bitbucket.org/lars_wernlund/citp/src/master/

 * https://www.capture.se/Portals/0/Downloads/CITP%20CAEX%20Specification%20F.pdf?ver=2020-07-03-093027-283

 * http://www.techref.info/web/prod/cap/data/citp.pdf

 *

 *

 * SPDX-License-Identifier: GPL-2.0-or-later

 */

/* Include files */

#include "config.h"

#include <epan/packet.h>

#include <epan/tfs.h>

#include <epan/conversation.h>

#include <epan/expert.h>

#include "packet-tcp.h"

#define MAKE_TYPE_VAL(a, b, c, d)   ((a)<<24 | (b)<<16 | (c)<<8 | (d))

#define CITP_PORTS "4809-4810" /* Not IANA registered */

/* constants */

#define CITP_COOKIE ((const uint8_t*)"CITP")

#define CITP_COOKIE_LEN 4

#define CITP_PINF MAKE_TYPE_VAL('P', 'I', 'N', 'F')

#define CITP_SDMX MAKE_TYPE_VAL('S', 'D', 'M', 'X')

#define CITP_FPTC MAKE_TYPE_VAL('F', 'P', 'T', 'C')

#define CITP_FSEL MAKE_TYPE_VAL('F', 'S', 'E', 'L')

#define CITP_FINF MAKE_TYPE_VAL('F', 'I', 'N', 'F')

#define CITP_CAEX MAKE_TYPE_VAL('C', 'A', 'E', 'X')

#define CITP_MSEX MAKE_TYPE_VAL('M', 'S', 'E', 'X')

#define CITP_PINF_PNAM MAKE_TYPE_VAL('P', 'N', 'a', 'm')

#define CITP_PINF_PLOC MAKE_TYPE_VAL('P', 'L', 'o', 'c')

#define CITP_SDMX_CAPA MAKE_TYPE_VAL('C', 'a', 'p', 'a')

#define CITP_SDMX_UNAM MAKE_TYPE_VAL('U', 'N', 'a', 'm')

#define CITP_SDMX_ENID MAKE_TYPE_VAL('E', 'n', 'I', 'd')

#define CITP_SDMX_CHBK MAKE_TYPE_VAL('C', 'h', 'B', 'k')

#define CITP_SDMX_CHLS MAKE_TYPE_VAL('C', 'h', 'L', 's')

#define CITP_SDMX_SXSR MAKE_TYPE_VAL('S', 'X', 'S', 'r')

#define CITP_SDMX_SXUS MAKE_TYPE_VAL('S', 'X', 'U', 'S')

#define CITP_FPTC_PTCH MAKE_TYPE_VAL('P', 't', 'c', 'h')

#define CITP_FPTC_UPTC MAKE_TYPE_VAL('U', 'P', 't', 'c')

#define CITP_FPTC_SPTC MAKE_TYPE_VAL('S', 'P', 't', 'c')

#define CITP_FSEL_SELE MAKE_TYPE_VAL('S', 'e', 'l', 'e')

#define CITP_FSEL_DESE MAKE_TYPE_VAL('D', 'e', 'S', 'e')

#define CITP_FINF_SFRA MAKE_TYPE_VAL('S', 'F', 'r', 'a')

#define CITP_FINF_FRAM MAKE_TYPE_VAL('F', 'r', 'a', 'm')

#define CITP_MSEX_CINF MAKE_TYPE_VAL('C', 'I', 'n', 'f')

#define CITP_MSEX_SINF MAKE_TYPE_VAL('S', 'I', 'n', 'f')

#define CITP_MSEX_NACK MAKE_TYPE_VAL('N', 'a', 'c', 'k')

#define CITP_MSEX_LSTA MAKE_TYPE_VAL('L', 'S', 't', 'a')

#define CITP_MSEX_GELI MAKE_TYPE_VAL('G', 'E', 'L', 'I')

#define CITP_MSEX_ELIN MAKE_TYPE_VAL('E', 'L', 'I', 'n')

#define CITP_MSEX_ELUP MAKE_TYPE_VAL('E', 'L', 'U', 'p')

#define CITP_MSEX_GEIN MAKE_TYPE_VAL('G', 'E', 'I', 'n')

#define CITP_MSEX_MEIN MAKE_TYPE_VAL('M', 'E', 'I', 'n')

#define CITP_MSEX_EEIN MAKE_TYPE_VAL('E', 'E', 'I', 'n')

#define CITP_MSEX_GLEI MAKE_TYPE_VAL('G', 'L', 'I', 'n')

#define CITP_MSEX_GELT MAKE_TYPE_VAL('G', 'E', 'L', 'T')

#define CITP_MSEX_ELTH MAKE_TYPE_VAL('E', 'L', 'T', 'h')

#define CITP_MSEX_GETH MAKE_TYPE_VAL('G', 'E', 'T', 'h')

#define CITP_MSEX_ETHN MAKE_TYPE_VAL('E', 'T', 'h', 'n')

#define CITP_MSEX_GVSR MAKE_TYPE_VAL('G', 'V', 'S', 'r')

#define CITP_MSEX_VSRC MAKE_TYPE_VAL('V', 'S', 'r', 'c')

#define CITP_MSEX_RQST MAKE_TYPE_VAL('R', 'q', 'S', 't')

#define CITP_MSEX_STFR MAKE_TYPE_VAL('S', 't', 'F', 'r')

#define CITP_CAEX_NACK 0xFFFFFFFF

#define CITP_CAEX_LIVE_VIEW_GET_STATUS 0x00000100

#define CITP_CAEX_LIVE_VIEW_STATUS     0x00000101

#define CITP_CAEX_LIVE_VIEW_GET_IMAGE  0x00000200

#define CITP_CAEX_LIVE_VIEW_IMAGE      0x00000201

#define CITP_CAEX_CUE_RECORD_CAPA      0x00010100

#define CITP_CAEX_CUE_RECORD           0x00010200

#define CITP_CAEX_CUE_CLEAR_CAPA       0x00010300

#define CITP_CAEX_CUE_CLEAR            0x00010400

#define CITP_CAEX_SHOW_ENTER           0x00020100

#define CITP_CAEX_SHOW_LEAVE           0x00020101

#define CITP_CAEX_SET_TRANS_SPACE      0x00020150

#define CITP_CAEX_FIXTURE_LIST_REQ     0x00020200

#define CITP_CAEX_FIXTURE_LIST         0x00020201

#define CITP_CAEX_FIXTURE_MODIFY       0x00020202

#define CITP_CAEX_FIXTURE_REMOVE       0x00020203

#define CITP_CAEX_FIXTURE_ID           0x00020204

#define CITP_CAEX_FIXTURE_SELECT       0x00020300

#define CITP_CAEX_FIXTURE_STATUS       0x00020400

#define CITP_CAEX_LASER_GET_LIST       0x00030100

#define CITP_CAEX_LASER_LIST           0x00030101

#define CITP_CAEX_LASER_CONTROL        0x00030102

#define CITP_CAEX_LASER_FRAME          0x00030200

#define CITP_SDMX_CAPABILITY_CHLS   1

#define CITP_SDMX_CAPABILITY_SXSR   2

#define CITP_SDMX_CAPABILITY_SXUS   3

#define CITP_SDMX_CAPABILITY_ARTNET 101

#define CITP_SDMX_CAPABILITY_E131   102

#define CITP_SDMX_CAPABILITY_NET2   103

#define CITP_SDMX_CAPABILITY_MANET  104

#define CITP_SDMX_CAPABILITY_COMPVC 105

#define CITP_CAEX_IDENTIFIER_RDM_MANF         5

#define CITP_CAEX_IDENTIFIER_RDM_MODEL        0

#define CITP_CAEX_IDENTIFIER_RDM_PERSON       1

#define CITP_CAEX_IDENTIFIER_ALTA_FIXT        2

#define CITP_CAEX_IDENTIFIER_ALTA_MODEL       3

#define CITP_CAEX_IDENTIFIER_CAPTURE_INSTANCE 4

#define CITP_MSEX_V10 0x0100

#define CITP_MSEX_V11 0x0101

#define CITP_MSEX_V12 0x0102

#define CITP_MSEX_FORMAT_RGB8 MAKE_TYPE_VAL('R', 'G', 'B', '8')

#define CITP_MSEX_FORMAT_JPEG MAKE_TYPE_VAL('J', 'P', 'E', 'G')

#define CITP_MSEX_FORMAT_PNG  MAKE_TYPE_VAL('P', 'N', 'G', ' ')

#define CITP_MSEX_FORMAT_FJPG MAKE_TYPE_VAL('f', 'J', 'P', 'G')

#define CITP_MSEX_FORMAT_FPNG MAKE_TYPE_VAL('f', 'P', 'N', 'G')

static int proto_citp;

static int proto_citp_pinf;

static int proto_citp_sdmx;

static int proto_citp_fptc;

static int proto_citp_fsel;

static int proto_citp_finf;

static int proto_citp_caex;

static int proto_citp_msex;

static dissector_handle_t citp_handle;

static dissector_handle_t citp_tcp_handle;

static dissector_table_t content_type_table;

static dissector_table_t encryption_id_table;

static dissector_handle_t dmx_chan_handle;

static dissector_handle_t jpeg_handle;

static dissector_handle_t png_handle;

/*  Open/Close trees */

static int ett_citp;

static int ett_citp_pinf;

static int ett_citp_sdmx;

static int ett_citp_fptc;

static int ett_citp_fsel;

static int ett_citp_finf;

static int ett_citp_caex;

static int ett_citp_msex;

static int ett_citp_sdmx_capabilities;

static int ett_citp_fptc_fixture_identifiers;

static int ett_citp_fptc_content_hint;

static int ett_citp_fsel_fixture_identifiers;

static int ett_citp_finf_fixture_identifiers;

static int ett_citp_caex_view_pos;

static int ett_citp_caex_view_focus;

static int ett_citp_caex_cue_option;

static int ett_citp_caex_laser_point;

static int ett_citp_caex_laser_point_colour;

static int ett_citp_caex_show_fixtures;

static int ett_citp_caex_show_fixture;

static int ett_citp_caex_show_fixture_identifier;

static int ett_citp_caex_show_fixture_pos;

static int ett_citp_caex_show_fixture_angles;

static int ett_citp_caex_show_fixture_changed_fields;

static int ett_citp_msex_supported_versions;

static int ett_citp_msex_supported_version;

static int ett_citp_msex_supported_library_types;

static int ett_citp_msex_libraries;

static int ett_citp_msex_library;

static int ett_citp_msex_elements;

static int ett_citp_msex_element;

static int ett_citp_msex_element_parameter_names;

static int ett_citp_msex_sources;

static int ett_citp_msex_source;

static int ett_citp_msex_layers;

static int ett_citp_msex_layer;

static int ett_citp_msex_layer_status_flags;

static int ett_citp_msex_thumbnail_formats;

static int ett_citp_msex_stream_formats;

static int ett_citp_msex_library_update_flags;

static int ett_citp_msex_thumbnail_flags;

static int ett_citp_msex_source_flags;

static int ett_citp_msex_library_id;

static int ett_citp_msex_library_parent_id;

static int ett_citp_msex_frame_fragment;

static int ett_citp_msex_library_affected_elements;

static int ett_citp_msex_library_affected_subs;

/* Expert Info */

static expert_field ei_citp_content_type;

static expert_field ei_citp_message_size;

static expert_field ei_citp_pinf_content_type;

static expert_field ei_citp_sdmx_content_type;

static expert_field ei_citp_fptc_content_type;

static expert_field ei_citp_fsel_content_type;

static expert_field ei_citp_finf_content_type;

static expert_field ei_citp_caex_content_code;

static expert_field ei_citp_caex_fixture_ident;

static expert_field ei_citp_caex_view_format;

static expert_field ei_citp_msex_content_type;

static expert_field ei_citp_msex_version;

static expert_field ei_citp_msex_thumb_format;

static expert_field ei_citp_msex_stream_format;

/*  Register fields */

static int hf_citp_cookie;

static int hf_citp_version_major;

static int hf_citp_version_minor;

static int hf_citp_message_index;

static int hf_citp_message_size;

static int hf_citp_message_part_count;

static int hf_citp_message_part_index;

static int hf_citp_content_type;

static int hf_citp_pinf_content_type;

static int hf_citp_pinf_listening_port;

static int hf_citp_pinf_name;

static int hf_citp_pinf_type;

static int hf_citp_pinf_state;

static int hf_citp_sdmx_content_type;

static int hf_citp_sdmx_capability_count;

static int hf_citp_sdmx_capabilities;

static int hf_citp_sdmx_capability;

static int hf_citp_sdmx_universe_index;

static int hf_citp_sdmx_universe_name;

static int hf_citp_sdmx_encryption_identifier;

static int hf_citp_sdmx_blind;

static int hf_citp_sdmx_first_channel;

static int hf_citp_sdmx_channel_count;

static int hf_citp_sdmx_channel_levels;

static int hf_citp_sdmx_encrypted_channel_data;

static int hf_citp_sdmx_channel_level_block;

static int hf_citp_sdmx_channel;

static int hf_citp_sdmx_channel_level;

static int hf_citp_sdmx_connection_string;

static int hf_citp_fptc_content_type;

static int hf_citp_fptc_content_hint;

static int hf_citp_fptc_content_hint_in_sequence;

static int hf_citp_fptc_content_hint_end_sequence;

static int hf_citp_fptc_fixture_identifier;

static int hf_citp_fptc_universe;

static int hf_citp_fptc_channel;

static int hf_citp_fptc_channel_count;

static int hf_citp_fptc_fixture_make;

static int hf_citp_fptc_fixture_name;

static int hf_citp_fptc_fixture_count;

static int hf_citp_fptc_fixture_identifiers;

static int hf_citp_fsel_content_type;

static int hf_citp_fsel_complete;

static int hf_citp_fsel_fixture_count;

static int hf_citp_fsel_fixture_identifiers;

static int hf_citp_fsel_fixture_identifier;

static int hf_citp_finf_content_type;

static int hf_citp_finf_fixture_count;

static int hf_citp_finf_fixture_identifiers;

static int hf_citp_finf_fixture_identifier;

static int hf_citp_finf_frame_filter_count;

static int hf_citp_finf_frame_gobo_count;

static int hf_citp_finf_frame_names;

static int hf_citp_finf_filter_name;

static int hf_citp_finf_gobo_name;

static int hf_citp_caex_content_code;

static int hf_citp_caex_nack_reason;

static int hf_citp_caex_view_availability;

static int hf_citp_caex_view_size;

static int hf_citp_caex_view_width;

static int hf_citp_caex_view_height;

static int hf_citp_caex_view_position;

static int hf_citp_caex_view_position_x;

static int hf_citp_caex_view_position_y;

static int hf_citp_caex_view_position_z;

static int hf_citp_caex_view_focus;

static int hf_citp_caex_view_focus_x;

static int hf_citp_caex_view_focus_y;

static int hf_citp_caex_view_focus_z;

static int hf_citp_caex_view_format;

static int hf_citp_caex_view_data_size;

static int hf_citp_caex_view_data;

static int hf_citp_caex_cue_availability;

static int hf_citp_caex_cue_option_count;

static int hf_citp_caex_cue_option;

static int hf_citp_caex_cue_option_name;

static int hf_citp_caex_cue_option_value;

static int hf_citp_caex_cue_option_choices;

static int hf_citp_caex_cue_option_help;

static int hf_citp_caex_cue_clear_availability;

static int hf_citp_caex_show_name;

static int hf_citp_caex_show_transformation_space;

static int hf_citp_caex_show_fixture_list_type;

static int hf_citp_caex_show_fixture_count;

static int hf_citp_caex_show_fixtures;

static int hf_citp_caex_show_fixture;

static int hf_citp_caex_show_fixture_console_identifier;

static int hf_citp_caex_show_fixture_manufacturer_name;

static int hf_citp_caex_show_fixture_model_name;

static int hf_citp_caex_show_fixture_mode_name;

static int hf_citp_caex_show_fixture_channel_count;

static int hf_citp_caex_show_fixture_is_dimmer;

static int hf_citp_caex_show_fixture_identifier_count;

static int hf_citp_caex_show_fixture_identifier;

static int hf_citp_caex_show_fixture_identifier_type;

static int hf_citp_caex_show_fixture_identifier_data_size;

static int hf_citp_caex_show_fixture_identifier_data;

static int hf_citp_caex_show_fixture_identifier_rdm_manufacturer_id;

static int hf_citp_caex_show_fixture_identifier_rdm_device_model_id;

static int hf_citp_caex_show_fixture_identifier_rdm_personality_id;

static int hf_citp_caex_show_fixture_identifier_altabase_fixture_id;

static int hf_citp_caex_show_fixture_identifier_altabase_mode_id;

static int hf_citp_caex_show_fixture_identifier_capture_instance_id;

static int hf_citp_caex_show_fixture_patched;

static int hf_citp_caex_show_fixture_universe;

static int hf_citp_caex_show_fixture_universe_channel;

static int hf_citp_caex_show_fixture_unit;

static int hf_citp_caex_show_fixture_channel;

static int hf_citp_caex_show_fixture_circuit;

static int hf_citp_caex_show_fixture_note;

static int hf_citp_caex_show_fixture_position;

static int hf_citp_caex_show_fixture_position_x;

static int hf_citp_caex_show_fixture_position_y;

static int hf_citp_caex_show_fixture_position_z;

static int hf_citp_caex_show_fixture_angles;

static int hf_citp_caex_show_fixture_angles_x;

static int hf_citp_caex_show_fixture_angles_y;

static int hf_citp_caex_show_fixture_angles_z;

static int hf_citp_caex_show_fixture_locked;

static int hf_citp_caex_show_fixture_clearable;

static int hf_citp_caex_show_fixture_changed_fields;

static int hf_citp_caex_show_fixture_changed_fields_patch;

static int hf_citp_caex_show_fixture_changed_fields_unit;

static int hf_citp_caex_show_fixture_changed_fields_channel;

static int hf_citp_caex_show_fixture_changed_fields_circuit;

static int hf_citp_caex_show_fixture_changed_fields_note;

static int hf_citp_caex_show_fixture_changed_fields_position;

static int hf_citp_caex_laser_source_key;

static int hf_citp_caex_laser_feed_count;

static int hf_citp_caex_laser_feed_name;

static int hf_citp_caex_laser_feed_index;

static int hf_citp_caex_laser_frame_rate;

static int hf_citp_caex_laser_frame_sequence_number;

static int hf_citp_caex_laser_point_count;

static int hf_citp_caex_laser_points;

static int hf_citp_caex_laser_point;

static int hf_citp_caex_laser_point_x_low;

static int hf_citp_caex_laser_point_y_low;

static int hf_citp_caex_laser_point_xy_high;

static int hf_citp_caex_laser_point_x;

static int hf_citp_caex_laser_point_y;

static int hf_citp_caex_laser_point_colour;

static int hf_citp_caex_laser_point_colour_r;

static int hf_citp_caex_laser_point_colour_g;

static int hf_citp_caex_laser_point_colour_b;

static int hf_citp_msex_version_major;

static int hf_citp_msex_version_minor;

static int hf_citp_msex_content_type;

static int hf_citp_msex_supported_version_count;

static int hf_citp_msex_supported_versions;

static int hf_citp_msex_supported_version;

static int hf_citp_msex_uuid;

static int hf_citp_msex_product_name;

static int hf_citp_msex_product_version_major;

static int hf_citp_msex_product_version_minor;

static int hf_citp_msex_product_version_bugfix;

static int hf_citp_msex_supported_library_types;

static int hf_citp_msex_supported_library_types_media;

static int hf_citp_msex_supported_library_types_effects;

static int hf_citp_msex_supported_library_types_cues;

static int hf_citp_msex_supported_library_types_crossfades;

static int hf_citp_msex_supported_library_types_masks;

static int hf_citp_msex_supported_library_types_blend_presets;

static int hf_citp_msex_supported_library_types_effect_presets;

static int hf_citp_msex_supported_library_types_image_presets;

static int hf_citp_msex_supported_library_types_3d_meshes;

static int hf_citp_msex_received_content_type;

static int hf_citp_msex_layer_count;

static int hf_citp_msex_layers;

static int hf_citp_msex_layer;

static int hf_citp_msex_layer_dmx_source;

static int hf_citp_msex_layer_number;

static int hf_citp_msex_layer_physical_output;

static int hf_citp_msex_layer_status_flags;

static int hf_citp_msex_layer_status_flags_playing;

static int hf_citp_msex_layer_status_flags_reverse;

static int hf_citp_msex_layer_status_flags_looping;

static int hf_citp_msex_layer_status_flags_bouncing;

static int hf_citp_msex_layer_status_flags_random;

static int hf_citp_msex_layer_status_flags_paused;

static int hf_citp_msex_library_count;

static int hf_citp_msex_libraries;

static int hf_citp_msex_library;

static int hf_citp_msex_library_type;

static int hf_citp_msex_library_number;

static int hf_citp_msex_library_id;

static int hf_citp_msex_library_id_level;

static int hf_citp_msex_library_id_level_1;

static int hf_citp_msex_library_id_level_2;

static int hf_citp_msex_library_id_level_3;

static int hf_citp_msex_library_parent_id;

static int hf_citp_msex_library_serial_number;

static int hf_citp_msex_library_dmx_min;

static int hf_citp_msex_library_dmx_max;

static int hf_citp_msex_library_name;

static int hf_citp_msex_library_sub_count;

static int hf_citp_msex_library_element_count;

static int hf_citp_msex_library_update_flags;

static int hf_citp_msex_library_update_flags_elements_updated;

static int hf_citp_msex_library_update_flags_elements_added_removed;

static int hf_citp_msex_library_update_flags_subs_updated;

static int hf_citp_msex_library_update_flags_subs_added_removed;

static int hf_citp_msex_library_update_flags_all_elements;

static int hf_citp_msex_library_update_flags_all_subs;

static int hf_citp_msex_library_affected_elements;

static int hf_citp_msex_library_affected_subs;

static int hf_citp_msex_library_affected_element;

static int hf_citp_msex_library_affected_sub;

static int hf_citp_msex_element_count;

static int hf_citp_msex_elements;

static int hf_citp_msex_element;

static int hf_citp_msex_element_number;

static int hf_citp_msex_element_serial_number;

static int hf_citp_msex_element_dmx_min;

static int hf_citp_msex_element_dmx_max;

static int hf_citp_msex_element_name;

static int hf_citp_msex_element_version_timestamp;

static int hf_citp_msex_element_position;

static int hf_citp_msex_element_width;

static int hf_citp_msex_element_height;

static int hf_citp_msex_element_length;

static int hf_citp_msex_element_fps;

static int hf_citp_msex_element_parameter_count;

static int hf_citp_msex_element_parameter_names;

static int hf_citp_msex_element_parameter_name;

static int hf_citp_msex_thumbnail_format_count;

static int hf_citp_msex_thumbnail_formats;

static int hf_citp_msex_thumbnail_format;

static int hf_citp_msex_thumbnail_width;

static int hf_citp_msex_thumbnail_height;

static int hf_citp_msex_thumbnail_flags;

static int hf_citp_msex_thumbnail_flags_preserve_aspect;

static int hf_citp_msex_thumbnail_buffer_size;

static int hf_citp_msex_thumbnail_buffer;

static int hf_citp_msex_source_count;

static int hf_citp_msex_sources;

static int hf_citp_msex_source;

static int hf_citp_msex_source_server_uuid;

static int hf_citp_msex_source_id;

static int hf_citp_msex_source_name;

static int hf_citp_msex_source_physical_output;

static int hf_citp_msex_source_layer_number;

static int hf_citp_msex_source_flags;

static int hf_citp_msex_source_flags_without_effects;

static int hf_citp_msex_source_width;

static int hf_citp_msex_source_height;

static int hf_citp_msex_stream_format_count;

static int hf_citp_msex_stream_formats;

static int hf_citp_msex_stream_format;

static int hf_citp_msex_stream_width;

static int hf_citp_msex_stream_height;

static int hf_citp_msex_stream_fps;

static int hf_citp_msex_stream_timeout;

static int hf_citp_msex_frame_buffer_size;

static int hf_citp_msex_frame_buffer;

static int hf_citp_msex_frame_index;

static int hf_citp_msex_frame_fragment;

static int hf_citp_msex_frame_fragment_count;

static int hf_citp_msex_frame_fragment_index;

static int hf_citp_msex_frame_fragment_byte_offset;

static const true_false_string tfs_live_blind = {

    "Blind",

    "Live",

};

static const value_string citp_content_type_names[] = {

    { CITP_PINF, "PINF : Peer INFormation" },

    { CITP_SDMX, "SDMX : Send DMX" },

    { CITP_FPTC, "FPTC : Fixture PATch" },

    { CITP_FSEL, "FSEL : Fixture SELection" },

    { CITP_FINF, "FINF : Fixture INFormation" },

    { CITP_CAEX, "CAEX : CApture EXtensions" },

    { CITP_MSEX, "MSEX : Media Server EXtensions" },

    { 0,         NULL },

};

static const value_string citp_pinf_content_type_names[] = {

    { CITP_PINF_PNAM, "PNam : Peer Name" },

    { CITP_PINF_PLOC, "PLoc : Peer Location" },

    { 0,              NULL },

};

static const value_string citp_sdmx_content_type_names[] = {

    { CITP_SDMX_CAPA, "Capa : Capabilities" },

    { CITP_SDMX_UNAM, "UNam : Universe Name" },

    { CITP_SDMX_ENID, "EnId : Encryption Identifier" },

    { CITP_SDMX_CHBK, "ChBk : Channel Block" },

    { CITP_SDMX_CHLS, "ChLs : Channel List" },

    { CITP_SDMX_SXSR, "SXSr : Set External Source" },

    { CITP_SDMX_SXUS, "SXUS : Set External Universe Source" },

    { 0,              NULL },

};

static const value_string citp_fptc_content_type_names[] = {

    { CITP_FPTC_PTCH, "Ptch : Patch" },

    { CITP_FPTC_UPTC, "UPtc : UnPatch" },

    { CITP_FPTC_SPTC, "SPtc : Send Patch" },

    { 0,              NULL },

};

static const value_string citp_fsel_content_type_names[] = {

    { CITP_FSEL_SELE, "Sele : Select" },

    { CITP_FSEL_DESE, "DeSe : Deselect" },

    { 0,              NULL },

};

static const value_string citp_finf_content_type_names[] = {

    { CITP_FINF_SFRA, "SFra : Send Frames" },

    { CITP_FINF_FRAM, "Fram : Frames" },

    { 0,              NULL },

};

static const value_string citp_msex_content_type_names[] = {

    { CITP_MSEX_CINF, "CInf : Client Information" },

    { CITP_MSEX_SINF, "SInf : Server Information" },

    { CITP_MSEX_NACK, "Nack : Negative Acknowledgement" },

    { CITP_MSEX_LSTA, "LSta : Layer Status" },

    { CITP_MSEX_GELI, "GELI : Get Element Library Information" },

    { CITP_MSEX_ELIN, "ELIn : Element Library Information" },

    { CITP_MSEX_ELUP, "ELUp : Element Library Updated" },

    { CITP_MSEX_GEIN, "GEIn : Get Element Information" },

    { CITP_MSEX_MEIN, "MEIn : Media Element Information" },

    { CITP_MSEX_EEIN, "EEIn : Effect Element Information" },

    { CITP_MSEX_GLEI, "GLIn : Generic Element Information" },

    { CITP_MSEX_GELT, "GELT : Get Element Library Thumbnail" },

    { CITP_MSEX_ELTH, "ELTh : Element Library Thumbnail" },

    { CITP_MSEX_GETH, "GETh : Get Element Thumbnail" },

    { CITP_MSEX_ETHN, "EThn : Element Thumbnail" },

    { CITP_MSEX_GVSR, "GVSr : Get Video Sources" },

    { CITP_MSEX_VSRC, "VSrc : Video Sources" },

    { CITP_MSEX_RQST, "RqSt : Request Stream" },

    { CITP_MSEX_STFR, "StFr : Stream Frame" },

    { 0,              NULL },

};

static const value_string citp_msex_content_type_short_names[] = {

    { CITP_MSEX_CINF, "CInf" },

    { CITP_MSEX_SINF, "SInf" },

    { CITP_MSEX_NACK, "Nack" },

    { CITP_MSEX_LSTA, "LSta" },

    { CITP_MSEX_GELI, "GELI" },

    { CITP_MSEX_ELIN, "ELIn" },

    { CITP_MSEX_ELUP, "ELUp" },

    { CITP_MSEX_GEIN, "GEIn" },

    { CITP_MSEX_MEIN, "MEIn" },

    { CITP_MSEX_EEIN, "EEIn" },

    { CITP_MSEX_GLEI, "GLIn" },

    { CITP_MSEX_GELT, "GELT" },

    { CITP_MSEX_ELTH, "ELTh" },

    { CITP_MSEX_GETH, "GETh" },

    { CITP_MSEX_ETHN, "EThn" },

    { CITP_MSEX_GVSR, "GVSr" },

    { CITP_MSEX_VSRC, "VSrc" },

    { CITP_MSEX_RQST, "RqSt" },

    { CITP_MSEX_STFR, "StFr" },

    { 0,              NULL },

};

/* Use these with BASE_SPECIAL_VALS */

static const value_string citp_all_fixtures_val_str[] = {

    { 0, "All Fixtures" },

    { 0, NULL}

};

static const value_string citp_all_libraries_val_str[] = {

    { 0, "All Libraries" },

    { 0, NULL}

};

static const value_string citp_all_elements_val_str[] = {

    { 0, "All Elements" },

    { 0, NULL}

};

static const value_string citp_sdmx_capability_names[] = {

    { CITP_SDMX_CAPABILITY_CHLS,   "ChLs channel list" },

    { CITP_SDMX_CAPABILITY_SXSR,   "SXSr external source" },

    { CITP_SDMX_CAPABILITY_SXUS,   "SXUS per-universe external sources" },

    { CITP_SDMX_CAPABILITY_ARTNET, "Art-Net external sources" },

    { CITP_SDMX_CAPABILITY_E131,   "BSR E1.31 external sources" },

    { CITP_SDMX_CAPABILITY_NET2,   "ETC Net2 external sources" },

    { CITP_SDMX_CAPABILITY_MANET,  "MA-Net external sources" },

    { CITP_SDMX_CAPABILITY_COMPVC, "Compulite VC external sources" },

    { 0,                           NULL },

};

static const value_string citp_caex_content_code_names[] = {

    { CITP_CAEX_LIVE_VIEW_GET_IMAGE,  "Get Live View Image" },

    { CITP_CAEX_LIVE_VIEW_IMAGE,      "Live View Image" },

    { CITP_CAEX_LIVE_VIEW_GET_STATUS, "Get Live View Status" },

    { CITP_CAEX_LIVE_VIEW_STATUS,     "Live View Status" },

    { CITP_CAEX_CUE_RECORD_CAPA,      "Set Cue Recording Capabilities" },

    { CITP_CAEX_CUE_RECORD,           "Record Cue" },

    { CITP_CAEX_CUE_CLEAR_CAPA,       "Set Recorder Clearing Capabilities" },

    { CITP_CAEX_CUE_CLEAR,            "Clear Recorder" },

    { CITP_CAEX_SHOW_ENTER,           "Enter Show" },

    { CITP_CAEX_SHOW_LEAVE,           "Leave Show" },

    { CITP_CAEX_SET_TRANS_SPACE,      "Set Fixture Transformation Space" },

    { CITP_CAEX_FIXTURE_LIST_REQ,     "Fixture List Request" },

    { CITP_CAEX_FIXTURE_LIST,         "Fixture List" },

    { CITP_CAEX_FIXTURE_MODIFY,       "Fixture Modify" },

    { CITP_CAEX_FIXTURE_REMOVE,       "Fixture Remove" },

    { CITP_CAEX_FIXTURE_ID,           "Fixture Identify" },

    { CITP_CAEX_FIXTURE_SELECT,       "Fixture Selection" },

    { CITP_CAEX_FIXTURE_STATUS,       "Fixture Console Status" },

    { CITP_CAEX_LASER_GET_LIST,       "Get Laser Feed List" },

    { CITP_CAEX_LASER_LIST,           "Laser Feed List" },

    { CITP_CAEX_LASER_CONTROL,        "Laser Feed Control" },

    { CITP_CAEX_LASER_FRAME,          "Laser Feed Frame" },

    { CITP_CAEX_NACK,                 "NAck" },

    { 0,                              NULL },

};

static const value_string citp_caex_nack_reason[] = {

    { 0, "Unknown Request" },

    { 1, "Incorrect or Malformed Request" },

    { 2, "Internal Error" },

    { 3, "Request Refused" },

    { 0, NULL },

};

static const value_string citp_caex_view_availability[] = {

    { 0, "Not available" },

    { 1, "Alpha view available" },

    { 2, "Beta view available" },

    { 3, "Gamma view available" },

    { 0, NULL },

};

static const value_string citp_caex_cue_record_availability[] = {

    { 0, "Not available" },

    { 1, "Available" },

    { 0, NULL },

};

static const value_string citp_caex_cue_clear_availability[] = {

    { 0, "Unsupported" },

    { 1, "Currently unavailable" },

    { 2, "Available" },

    { 0, NULL },

};

static const value_string citp_caex_show_transformation_spaces[] = {

    { 0, "Native" },

    { 1, "PanHome" },

    { 0, NULL },

};

static const value_string citp_caex_show_fixture_list_types[] = {

    { 0, "Existing patch list" },

    { 1, "New fixture(s)" },

    { 2, "Exchanged fixture(s)" },

    { 0, NULL },

};

static const value_string citp_caex_show_identifier_types[] = {

    { CITP_CAEX_IDENTIFIER_RDM_MODEL,        "RDM Model Id" },

    { CITP_CAEX_IDENTIFIER_RDM_PERSON,       "RDM Personality Id" },

    { CITP_CAEX_IDENTIFIER_ALTA_FIXT,        "AltaBase Fixture Id" },

    { CITP_CAEX_IDENTIFIER_ALTA_MODEL,       "AltaBase Model Id" },

    { CITP_CAEX_IDENTIFIER_CAPTURE_INSTANCE, "Capture Instance Id" },

    { CITP_CAEX_IDENTIFIER_RDM_MANF,         "RDM Manufacturer Id" },

    { 0,                                     NULL },

};

static const value_string citp_msex_library_types[] = {

    { 1, "Media" },

    { 2, "Effects" },

    { 3, "Cues" },

    { 4, "Crossfades" },

    { 5, "Masks" },

    { 6, "Blend Presets" },

    { 7, "Effect Presets" },

    { 8, "Image Presets" },

    { 9, "3D Meshes" },

    { 0, NULL },

};

static int * const citp_fptc_content_hint[] = {

    &hf_citp_fptc_content_hint_in_sequence,

    &hf_citp_fptc_content_hint_end_sequence,

    NULL

};

static int * const citp_caex_laser_point_colour_fields[] = {

    &hf_citp_caex_laser_point_colour_r,

    &hf_citp_caex_laser_point_colour_g,

    &hf_citp_caex_laser_point_colour_b,

    NULL

};

static int * const citp_caex_show_fixture_changed_fields[] = {

    &hf_citp_caex_show_fixture_changed_fields_patch,

    &hf_citp_caex_show_fixture_changed_fields_unit,

    &hf_citp_caex_show_fixture_changed_fields_channel,

    &hf_citp_caex_show_fixture_changed_fields_circuit,

    &hf_citp_caex_show_fixture_changed_fields_note,

    &hf_citp_caex_show_fixture_changed_fields_position,

    NULL

};

static int * const citp_msex_supported_library_types[] = {

    &hf_citp_msex_supported_library_types_media,

    &hf_citp_msex_supported_library_types_effects,

    &hf_citp_msex_supported_library_types_cues,

    &hf_citp_msex_supported_library_types_crossfades,

    &hf_citp_msex_supported_library_types_masks,

    &hf_citp_msex_supported_library_types_blend_presets,

    &hf_citp_msex_supported_library_types_effect_presets,

    &hf_citp_msex_supported_library_types_image_presets,

    &hf_citp_msex_supported_library_types_3d_meshes,

    NULL

};

static int * const citp_msex_layer_status_flags[] = {

    &hf_citp_msex_layer_status_flags_playing,

    &hf_citp_msex_layer_status_flags_reverse,

    &hf_citp_msex_layer_status_flags_looping,

    &hf_citp_msex_layer_status_flags_bouncing,

    &hf_citp_msex_layer_status_flags_random,

    &hf_citp_msex_layer_status_flags_paused,

    NULL

};

static int * const citp_msex_library_update_flags[] = {

    &hf_citp_msex_library_update_flags_elements_updated,

    &hf_citp_msex_library_update_flags_elements_added_removed,

    &hf_citp_msex_library_update_flags_subs_updated,

    &hf_citp_msex_library_update_flags_subs_added_removed,

    &hf_citp_msex_library_update_flags_all_elements,

    &hf_citp_msex_library_update_flags_all_subs,

    NULL

};

static int * const citp_msex_thumbnail_flags[] = {

    &hf_citp_msex_thumbnail_flags_preserve_aspect,

    NULL

};

static int * const citp_msex_source_flags[] = {

    &hf_citp_msex_source_flags_without_effects,

    NULL

};

/******************************************************************************/

/* Dissect protocol                                                           */

typedef struct sdmx_enc_info {

    char *id;

} sdmx_enc_info;

/** enid should have been allocated with wmem_file_scope() */

static void set_conversation_encryption(packet_info *pinfo, char* enid) {

    conversation_t *conv = find_or_create_conversation(pinfo);

    sdmx_enc_info * info = conversation_get_proto_data(conv, proto_citp_sdmx);

    if (info == NULL) {

        info = wmem_alloc0(wmem_file_scope(), sizeof(sdmx_enc_info));

        info->id = enid;

        conversation_add_proto_data(conv, proto_citp_sdmx, (void*)info);

    } else {

        if (strcmp(info->id, enid) == 0) {

            /* free unused enid */

            wmem_free(wmem_file_scope(), enid);

        } else {

            /* free old enid, is copied wherever it's used in proto tree, so no use-after-free */

            wmem_free(wmem_file_scope(), info->id);

            info->id = enid;

        }

    }

}

static char* get_conversation_encryption(packet_info *pinfo) {

    conversation_t *conv = find_or_create_conversation(pinfo);

    sdmx_enc_info * info = conversation_get_proto_data(conv, proto_citp_sdmx);

    if (info == NULL) return NULL;

    return info->id;

}

static int

dissect_u16_list(tvbuff_t *tvb, proto_tree *tree, int offset, uint32_t count, int hf_list, int ett_list, int hf_list_element) {

    if (count != 0) {

        proto_item *ti = proto_tree_add_item(tree, hf_list, tvb, offset, count * 2, ENC_NA);

        proto_tree *list_tree = proto_item_add_subtree(ti, ett_list);

        for (unsigned int i = 0; i < count; i++) {

            proto_tree_add_item(list_tree, hf_list_element, tvb, offset, 2, ENC_LITTLE_ENDIAN);

            offset += 2;

        }

    }

    return offset;

}

static int

dissect_pinf(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)

{

    unsigned str_len;

    const uint8_t *name;

    unsigned offset = 0;

    col_append_str(pinfo->cinfo, COL_PROTOCOL, "/PINF");

    /* Clear the info column */

    col_clear(pinfo->cinfo, COL_INFO);

    proto_item *ti = proto_tree_add_item(tree, proto_citp_pinf, tvb, offset, -1, ENC_NA);

    proto_tree *pinf_tree = proto_item_add_subtree(ti, ett_citp_pinf);

    uint32_t content_type;

    proto_tree_add_item_ret_uint(pinf_tree, hf_citp_pinf_content_type, tvb, offset, 4, ENC_BIG_ENDIAN, &content_type);

    offset += 4;

    switch (content_type) {

        case CITP_PINF_PNAM:

            proto_tree_add_item_ret_string_and_length(pinf_tree, hf_citp_pinf_name, tvb, offset, -1, ENC_UTF_8, pinfo->pool, &name, &str_len);

            offset += str_len;

            col_add_fstr(pinfo->cinfo, COL_INFO, "PNam, %s", name);

            break;

        case CITP_PINF_PLOC: {

            uint32_t port;

            proto_tree_add_item_ret_uint(pinf_tree, hf_citp_pinf_listening_port, tvb, offset, 2, ENC_LITTLE_ENDIAN, &port);

            offset += 2;

            proto_tree_add_item_ret_length(pinf_tree, hf_citp_pinf_type, tvb, offset, -1, ENC_UTF_8, &str_len);

            offset += str_len;

            proto_tree_add_item_ret_string_and_length(pinf_tree, hf_citp_pinf_name, tvb, offset, -1, ENC_UTF_8, pinfo->pool, &name, &str_len);

            offset += str_len;

            proto_tree_add_item_ret_length(pinf_tree, hf_citp_pinf_state, tvb, offset, -1, ENC_UTF_8, &str_len);

            offset += str_len;

            col_add_fstr(pinfo->cinfo, COL_INFO, "PLoc, Port %d, %s", port, name);

            break;

        }

        default:

            expert_add_info(pinfo, tree, &ei_citp_pinf_content_type);

            break;

    }

    return offset;

}

static int

dissect_sdmx(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)

{

    unsigned str_len;

    uint32_t count;

    uint32_t univ_num; const uint8_t *name;

    unsigned offset = 0;

    col_append_str(pinfo->cinfo, COL_PROTOCOL, "/SDMX");

    /* Clear the info column */

    col_clear(pinfo->cinfo, COL_INFO);

    proto_item *ti = proto_tree_add_item(tree, proto_citp_sdmx, tvb, offset, -1, ENC_NA);

    proto_tree *sdmx_tree = proto_item_add_subtree(ti, ett_citp_sdmx);

    uint32_t content_type;

    proto_tree_add_item_ret_uint(sdmx_tree, hf_citp_sdmx_content_type, tvb, offset, 4, ENC_BIG_ENDIAN, &content_type);

    offset += 4;

    switch (content_type) {

        case CITP_SDMX_CAPA:

            proto_tree_add_item_ret_uint(sdmx_tree, hf_citp_sdmx_capability_count, tvb, offset, 2, ENC_LITTLE_ENDIAN, &count);

            offset += 2;

            offset = dissect_u16_list(tvb, sdmx_tree, offset, count, hf_citp_sdmx_capabilities, ett_citp_sdmx_capabilities, hf_citp_sdmx_capability);

            col_add_fstr(pinfo->cinfo, COL_INFO, "Capa, Count %d", count);

            break;

        case CITP_SDMX_UNAM:

            proto_tree_add_item_ret_uint(sdmx_tree, hf_citp_sdmx_universe_index, tvb, offset, 1, ENC_LITTLE_ENDIAN, &univ_num);

            offset += 1;

            proto_tree_add_item_ret_string_and_length(sdmx_tree, hf_citp_sdmx_universe_name, tvb, offset, -1, ENC_UTF_8, pinfo->pool, &name, &str_len);

            offset += str_len;

            col_add_fstr(pinfo->cinfo, COL_INFO, "UNam, Universe %d: %s", univ_num, name);

            break;

        case CITP_SDMX_ENID: {

            str_len = tvb_strsize(tvb, offset);

            char* enid = (char*)tvb_get_string_enc(wmem_file_scope(), tvb, offset, str_len, ENC_UTF_8);

            proto_tree_add_item(sdmx_tree, hf_citp_sdmx_encryption_identifier, tvb, offset, str_len, ENC_UTF_8);

            offset += str_len;

            col_add_fstr(pinfo->cinfo, COL_INFO, "EnId, %s", enid);

            /* add encryption info to conversation */

            set_conversation_encryption(pinfo, enid);

            break;

        }

        case CITP_SDMX_CHBK: {

            bool blind;

            proto_tree_add_item_ret_boolean(sdmx_tree, hf_citp_sdmx_blind, tvb, offset, 1, ENC_LITTLE_ENDIAN, &blind);

            offset += 1;

            proto_tree_add_item_ret_uint(sdmx_tree, hf_citp_sdmx_universe_index, tvb, offset, 1, ENC_LITTLE_ENDIAN, &univ_num);

            offset += 1;

            uint32_t start_chan;

            proto_tree_add_item_ret_uint(sdmx_tree, hf_citp_sdmx_first_channel, tvb, offset, 2, ENC_LITTLE_ENDIAN, &start_chan);

            offset += 2;

            proto_tree_add_item_ret_uint(sdmx_tree, hf_citp_sdmx_channel_count, tvb, offset, 2, ENC_LITTLE_ENDIAN, &count);

            offset += 2;

            col_add_fstr(pinfo->cinfo, COL_INFO, "ChBk, %s, Universe %d, Channels %d-%d", tfs_get_string(blind, &tfs_live_blind), univ_num, start_chan+1, start_chan+count);

            char* enc_info = get_conversation_encryption(pinfo);

            if (enc_info != NULL) {

                proto_tree_add_item(sdmx_tree, hf_citp_sdmx_encrypted_channel_data, tvb, offset, count, ENC_NA);

                proto_item_set_generated(

                    proto_tree_add_string(sdmx_tree, hf_citp_sdmx_encryption_identifier, tvb, offset, 0, enc_info));

                /* call into encryption sub-dissector */

                col_set_fence(pinfo->cinfo, COL_INFO);

                dissector_try_string_with_data(encryption_id_table, enc_info, tvb_new_subset_length(tvb, offset, count), pinfo, tree, true, NULL);

                col_clear_fence(pinfo->cinfo, COL_INFO);

                offset += count;

            } else {

                tvbuff_t* dmx_tvb = tvb_new_subset_length(tvb, offset, count);

                proto_tree_add_item(sdmx_tree, hf_citp_sdmx_channel_levels, tvb, offset, count, ENC_NA);

                offset += count;

                /* Set info writable,

                 * otherwise dmx-chan will clear the column then not add anything, this keeps some useful info

                 */

                bool saved_write = col_get_writable(pinfo->cinfo, COL_INFO);

                col_set_writable(pinfo->cinfo, COL_INFO, false);

                call_dissector(dmx_chan_handle, dmx_tvb, pinfo, tree);

                col_set_writable(pinfo->cinfo, COL_INFO, saved_write);

            }

            break;

        }

        case CITP_SDMX_CHLS:

            proto_tree_add_item_ret_uint(sdmx_tree, hf_citp_sdmx_channel_count, tvb, offset, 2, ENC_LITTLE_ENDIAN, &count);

            offset += 2;

            col_add_fstr(pinfo->cinfo, COL_INFO, "ChLs, %d channels", count);

            for (unsigned int i = 0; i < count; i++) {

                proto_item* chan = proto_tree_add_item(sdmx_tree, hf_citp_sdmx_channel_level_block, tvb, offset, 4, ENC_NA);

                proto_tree* chan_tree = proto_item_add_subtree(chan, hf_citp_sdmx_channel_level_block);

                proto_tree_add_item(chan_tree, hf_citp_sdmx_universe_index, tvb, offset, 1, ENC_LITTLE_ENDIAN);

                offset+=1;

                uint32_t chan_idx, chan_level;

                proto_tree_add_item_ret_uint(chan_tree, hf_citp_sdmx_channel, tvb, offset, 2, ENC_LITTLE_ENDIAN, &chan_idx);

                offset+=2;

                proto_tree_add_item_ret_uint(chan_tree, hf_citp_sdmx_channel_level, tvb, offset, 1, ENC_LITTLE_ENDIAN, &chan_level);

                offset+=1;

                proto_item_append_text(chan, ", %u @ %u", chan_idx, chan_level);

            }

            break;

        case CITP_SDMX_SXSR:

            proto_tree_add_item_ret_string_and_length(sdmx_tree, hf_citp_sdmx_connection_string, tvb, offset, -1, ENC_UTF_8, pinfo->pool, &name, &str_len);

            offset += str_len;

            col_add_fstr(pinfo->cinfo, COL_INFO, "SXSr, %s", name);

            break;

        case CITP_SDMX_SXUS:

            proto_tree_add_item_ret_uint(sdmx_tree, hf_citp_sdmx_universe_index, tvb, offset, 1, ENC_LITTLE_ENDIAN, &univ_num);

            offset += 1;

            proto_tree_add_item_ret_string_and_length(sdmx_tree, hf_citp_sdmx_connection_string, tvb, offset, -1, ENC_UTF_8, pinfo->pool, &name, &str_len);

            offset += str_len;

            col_add_fstr(pinfo->cinfo, COL_INFO, "SXUS, Universe %d, %s", univ_num, name);

            break;

        default:

            expert_add_info(pinfo, tree, &ei_citp_sdmx_content_type);

            break;

    }

    proto_item_set_len(ti, offset);

    return offset;

}

static int

dissect_fptc(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)

{

    unsigned str_len;

    unsigned offset = 0;

    col_append_str(pinfo->cinfo, COL_PROTOCOL, "/FPTC");

    /* Clear the info column */

    col_clear(pinfo->cinfo, COL_INFO);

    proto_item *ti = proto_tree_add_item(tree, proto_citp_fptc, tvb, offset, -1, ENC_NA);

    proto_tree *fptc_tree = proto_item_add_subtree(ti, ett_citp_fptc);

    uint32_t content_type;

    proto_tree_add_item_ret_uint(fptc_tree, hf_citp_fptc_content_type, tvb, offset, 4, ENC_BIG_ENDIAN, &content_type);

    offset += 4;

    proto_tree_add_bitmask(fptc_tree, tvb, offset, hf_citp_fptc_content_hint, ett_citp_fptc_content_hint, citp_fptc_content_hint, ENC_LITTLE_ENDIAN);

    offset += 4;

    switch (content_type) {

        case CITP_FPTC_PTCH: {

            uint32_t fixt_id, univ_num, chan_s, chan_cnt;

            proto_tree_add_item_ret_uint(fptc_tree, hf_citp_fptc_fixture_identifier, tvb, offset, 2, ENC_LITTLE_ENDIAN, &fixt_id);

            offset += 2;

            proto_tree_add_item_ret_uint(fptc_tree, hf_citp_fptc_universe, tvb, offset, 1, ENC_LITTLE_ENDIAN, &univ_num);

            offset += 1;

            offset += 1; /* RESERVED */

            proto_tree_add_item_ret_uint(fptc_tree, hf_citp_fptc_channel, tvb, offset, 2, ENC_LITTLE_ENDIAN, &chan_s);

            offset += 2;

            proto_tree_add_item_ret_uint(fptc_tree, hf_citp_fptc_channel_count, tvb, offset, 2, ENC_LITTLE_ENDIAN, &chan_cnt);

            offset += 2;

            proto_tree_add_item_ret_length(fptc_tree, hf_citp_fptc_fixture_make, tvb, offset, -1, ENC_UTF_8, &str_len);

            offset += str_len;

            proto_tree_add_item_ret_length(fptc_tree, hf_citp_fptc_fixture_name, tvb, offset, -1, ENC_UTF_8, &str_len);

            offset += str_len;

            col_add_fstr(pinfo->cinfo, COL_INFO, "Ptch, ID %d, Universe %d, Channels %d-%d", fixt_id, univ_num, chan_s+1, chan_s+chan_cnt);