path: root/epan/dissectors/packet-usb-com.c

/* packet-usb-com.c
 * Routines for USB Communications and CDC Control dissection
 * Copyright 2013, Pascal Quantin <pascal@wireshark.org>
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1998 Gerald Combs
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */

#include "config.h"

#include <epan/packet.h>
#include <epan/expert.h>
#include <epan/follow.h>
#include <epan/conversation.h>
#include <epan/tfs.h>
#include <epan/unit_strings.h>
#include "packet-usb.h"

static int cdc_data_follow_tap;
static int proto_usb;

/* protocols and header fields */
static int proto_usb_com;
static int hf_usb_com_descriptor_subtype;
static int hf_usb_com_descriptor_cdc;
static int hf_usb_com_descriptor_payload;
static int hf_usb_com_control_subclass;
static int hf_usb_com_control_request_code;
static int hf_usb_com_control_value;
static int hf_usb_com_control_index;
static int hf_usb_com_control_length;
static int hf_usb_com_control_response_code;
static int hf_usb_com_control_payload;
static int hf_usb_com_get_ntb_params_length;
static int hf_usb_com_get_ntb_params_ntb_formats_supported;
static int hf_usb_com_get_ntb_params_ntb_formats_supported_16bit;
static int hf_usb_com_get_ntb_params_ntb_formats_supported_32bit;
static int hf_usb_com_get_ntb_params_ntb_in_max_size;
static int hf_usb_com_get_ntb_params_ndp_in_divisor;
static int hf_usb_com_get_ntb_params_ndp_in_payload_remainder;
static int hf_usb_com_get_ntb_params_ndp_in_alignment;
static int hf_usb_com_get_ntb_params_reserved;
static int hf_usb_com_get_ntb_params_ntb_out_max_size;
static int hf_usb_com_get_ntb_params_ndp_out_divisor;
static int hf_usb_com_get_ntb_params_ndp_out_payload_remainder;
static int hf_usb_com_get_ntb_params_ndp_out_alignment;
static int hf_usb_com_get_ntb_params_ntb_out_max_datagrams;
static int hf_usb_com_get_net_address_eui48;
static int hf_usb_com_set_net_address_eui48;
static int hf_usb_com_get_ntb_format_ntb_format;
static int hf_usb_com_set_ntb_format_ntb_format;
static int hf_usb_com_get_ntb_input_size_ntb_in_max_size;
static int hf_usb_com_get_ntb_input_size_ntb_in_max_datagrams;
static int hf_usb_com_get_ntb_input_size_reserved;
static int hf_usb_com_set_ntb_input_size_ntb_in_max_size;
static int hf_usb_com_set_ntb_input_size_ntb_in_max_datagrams;
static int hf_usb_com_set_ntb_input_size_reserved;
static int hf_usb_com_get_max_datagram_size_size;
static int hf_usb_com_set_max_datagram_size_size;
static int hf_usb_com_get_crc_mode_crc_mode;
static int hf_usb_com_set_crc_mode_crc_mode;
static int hf_usb_com_capabilities;
static int hf_usb_com_descriptor_acm_capabilities_reserved;
static int hf_usb_com_descriptor_acm_capabilities_network_connection;
static int hf_usb_com_descriptor_acm_capabilities_send_break;
static int hf_usb_com_descriptor_acm_capabilities_line_and_state;
static int hf_usb_com_descriptor_acm_capabilities_comm_features;
static int hf_usb_com_descriptor_control_interface;
static int hf_usb_com_descriptor_subordinate_interface;
static int hf_usb_com_descriptor_cm_capabilities_reserved;
static int hf_usb_com_descriptor_cm_capabilities_call_management_over_data_class_interface;
static int hf_usb_com_descriptor_cm_capabilities_call_management;
static int hf_usb_com_descriptor_cm_data_interface;
static int hf_usb_com_descriptor_ecm_mac_address;
static int hf_usb_com_descriptor_ecm_eth_stats;
static int hf_usb_com_descriptor_ecm_eth_stats_reserved;
static int hf_usb_com_descriptor_ecm_eth_stats_xmit_late_collisions;
static int hf_usb_com_descriptor_ecm_eth_stats_xmit_times_crs_lost;
static int hf_usb_com_descriptor_ecm_eth_stats_xmit_heartbeat_failure;
static int hf_usb_com_descriptor_ecm_eth_stats_xmit_underrun;
static int hf_usb_com_descriptor_ecm_eth_stats_rcv_overrun;
static int hf_usb_com_descriptor_ecm_eth_stats_xmit_max_collisions;
static int hf_usb_com_descriptor_ecm_eth_stats_xmit_deferred;
static int hf_usb_com_descriptor_ecm_eth_stats_xmit_more_collisions;
static int hf_usb_com_descriptor_ecm_eth_stats_xmit_one_collision;
static int hf_usb_com_descriptor_ecm_eth_stats_rcv_error_alignment;
static int hf_usb_com_descriptor_ecm_eth_stats_transmit_queue_length;
static int hf_usb_com_descriptor_ecm_eth_stats_rcv_crc_error;
static int hf_usb_com_descriptor_ecm_eth_stats_broadcast_frames_rcv;
static int hf_usb_com_descriptor_ecm_eth_stats_broadcast_bytes_rcv;
static int hf_usb_com_descriptor_ecm_eth_stats_multicast_frames_rcv;
static int hf_usb_com_descriptor_ecm_eth_stats_multicast_bytes_rcv;
static int hf_usb_com_descriptor_ecm_eth_stats_directed_frames_rcv;
static int hf_usb_com_descriptor_ecm_eth_stats_directed_bytes_rcv;
static int hf_usb_com_descriptor_ecm_eth_stats_broadcast_frames_xmit;
static int hf_usb_com_descriptor_ecm_eth_stats_broadcast_bytes_xmit;
static int hf_usb_com_descriptor_ecm_eth_stats_multicast_frames_xmit;
static int hf_usb_com_descriptor_ecm_eth_stats_multicast_bytes_xmit;
static int hf_usb_com_descriptor_ecm_eth_stats_directed_frames_xmit;
static int hf_usb_com_descriptor_ecm_eth_stats_directed_bytes_xmit;
static int hf_usb_com_descriptor_ecm_eth_stats_rcv_no_buffer;
static int hf_usb_com_descriptor_ecm_eth_stats_rcv_error;
static int hf_usb_com_descriptor_ecm_eth_stats_xmit_error;
static int hf_usb_com_descriptor_ecm_eth_stats_rvc_ok;
static int hf_usb_com_descriptor_ecm_eth_stats_xmit_ok;
static int hf_usb_com_descriptor_ecm_max_segment_size;
static int hf_usb_com_descriptor_ecm_nb_mc_filters;
static int hf_usb_com_descriptor_ecm_nb_mc_filters_mc_address_filtering;
static int hf_usb_com_descriptor_ecm_nb_mc_filters_nb_filters_supported;
static int hf_usb_com_descriptor_ecm_nb_power_filters;
static int hf_usb_com_interrupt_request_type;
static int hf_usb_com_interrupt_notif_code;
static int hf_usb_com_interrupt_value;
static int hf_usb_com_interrupt_value_nw_conn;
static int hf_usb_com_interrupt_index;
static int hf_usb_com_interrupt_length;
static int hf_usb_com_interrupt_dl_bitrate;
static int hf_usb_com_interrupt_ul_bitrate;
static int hf_usb_com_interrupt_payload;
static int hf_usb_com_data_stream;
static int hf_usb_com_data_in_payload;
static int hf_usb_com_data_out_payload;

static int ett_usb_com;
static int ett_usb_com_capabilities;
static int ett_usb_com_bitmap;
static int ett_usb_com_descriptor_ecm_eth_stats;
static int ett_usb_com_descriptor_ecm_nb_mc_filters;

static dissector_handle_t usb_com_descriptor_handle;
static dissector_handle_t usb_com_control_handle;
static dissector_handle_t usb_com_bulk_handle;
static dissector_handle_t usb_com_interrupt_handle;

static dissector_handle_t mbim_control_handle;
static dissector_handle_t mbim_descriptor_handle;
static dissector_handle_t mbim_bulk_handle;
static dissector_handle_t eth_withoutfcs_handle;

static expert_field ei_unexpected_controlling_iface;

static wmem_tree_t* controlling_ifaces;

typedef struct _controlling_iface {
    uint16_t interfaceClass;
    uint16_t interfaceSubclass;
    uint16_t interfaceProtocol;
} controlling_iface_t;

static uint32_t cdc_data_stream_count;

typedef struct _cdc_data_conv {
    uint32_t stream;
} cdc_data_conv_t;

#define CS_INTERFACE 0x24
#define CS_ENDPOINT  0x25

static const value_string usb_com_descriptor_type_vals[] = {
    { CS_INTERFACE, "CS_INTERFACE"},
    { CS_ENDPOINT, "CS_ENDPOINT"},
    { 0, NULL}
};
static value_string_ext usb_com_descriptor_type_vals_ext = VALUE_STRING_EXT_INIT(usb_com_descriptor_type_vals);

static const value_string usb_com_descriptor_subtype_vals[] = {
    { 0x00, "Header Functional Descriptor"},
    { 0x01, "Call Management Functional Descriptor"},
    { 0x02, "Abstract Control Management Functional Descriptor"},
    { 0x03, "Direct Line Management Functional Descriptor"},
    { 0x04, "Telephone Ringer Functional Descriptor"},
    { 0x05, "Telephone Call and Line State Reporting Capabilities Functional Descriptor"},
    { 0x06, "Union Functional Descriptor"},
    { 0x07, "Country Selection Functional Descriptor"},
    { 0x08, "Telephone Operational Modes Functional Descriptor"},
    { 0x09, "USB Terminal Functional Descriptor"},
    { 0x0A, "Network Channel Terminal Descriptor"},
    { 0x0B, "Protocol Unit Functional Descriptor"},
    { 0x0C, "Extension Unit Functional Descriptor"},
    { 0x0D, "Multi-Channel Management Functional Descriptor"},
    { 0x0E, "CAPI Control Management Functional Descriptor"},
    { 0x0F, "Ethernet Networking Functional Descriptor"},
    { 0x10, "ATM Networking Functional Descriptor"},
    { 0x11, "Wireless Handset Control Model Functional Descriptor"},
    { 0x12, "Mobile Direct Line Model Functional Descriptor"},
    { 0x13, "MDLM Detail Functional Descriptor"},
    { 0x14, "Device Management Model Functional Descriptor"},
    { 0x15, "OBEX Functional Descriptor"},
    { 0x16, "Command Set Functional Descriptor"},
    { 0x17, "Command Set Detail Functional Descriptor"},
    { 0x18, "Telephone Control Model Functional Descriptor"},
    { 0x19, "OBEX Service Identifier Functional Descriptor"},
    { 0x1A, "NCM Functional Descriptor"},
    { 0x1B, "MBIM Functional Descriptor"},
    { 0x1C, "MBIM Extended Functional Descriptor"},
    { 0, NULL}
};
static value_string_ext usb_com_descriptor_subtype_vals_ext = VALUE_STRING_EXT_INIT(usb_com_descriptor_subtype_vals);

#define COM_SUBCLASS_RESERVED 0x00
#define COM_SUBCLASS_DLCM     0x01
#define COM_SUBCLASS_ACM      0x02
#define COM_SUBCLASS_TCM      0x03
#define COM_SUBCLASS_MCCM     0x04
#define COM_SUBCLASS_CCM      0x05
#define COM_SUBCLASS_ENCM     0x06
#define COM_SUBCLASS_ANCM     0x07
#define COM_SUBCLASS_WHCM     0x08
#define COM_SUBCLASS_DM       0x09
#define COM_SUBCLASS_MDLM     0x0a
#define COM_SUBCLASS_OBEX     0x0b
#define COM_SUBCLASS_EEM      0x0c
#define COM_SUBCLASS_NCM      0x0d
#define COM_SUBCLASS_MBIM     0x0e

static const value_string usb_com_subclass_vals[] = {
    {COM_SUBCLASS_RESERVED, "RESERVED"},
    {COM_SUBCLASS_DLCM, "Direct Line Control Model"},
    {COM_SUBCLASS_ACM, "Abstract Control Model"},
    {COM_SUBCLASS_TCM, "Telephone Control Model"},
    {COM_SUBCLASS_MCCM, "Multi-Channel Control Model"},
    {COM_SUBCLASS_CCM, "CAPI Control Model"},
    {COM_SUBCLASS_ENCM, "Ethernet Networking Control Model"},
    {COM_SUBCLASS_ANCM, "ATM Networking Control Model"},
    {COM_SUBCLASS_WHCM, "Wireless Handset Control Model"},
    {COM_SUBCLASS_DM, "Device Management"},
    {COM_SUBCLASS_MDLM, "Mobile Direct Line Model"},
    {COM_SUBCLASS_OBEX, "OBEX"},
    {COM_SUBCLASS_EEM, "Ethernet Emulation Model"},
    {COM_SUBCLASS_NCM, "Network Control Model"},
    {COM_SUBCLASS_MBIM, "Mobile Broadband Interface Model"},
    {0, NULL}
};
value_string_ext ext_usb_com_subclass_vals = VALUE_STRING_EXT_INIT(usb_com_subclass_vals);

#define SEND_ENCAPSULATED_COMMAND                    0x00
#define GET_ENCAPSULATED_RESPONSE                    0x01
#define SET_COMM_FEATURE                             0x02
#define GET_COMM_FEATURE                             0x03
#define CLEAR_COMM_FEATURE                           0x04
#define RESET_FUNCTION                               0x05
#define SET_AUX_LINE_STATE                           0x10
#define SET_HOOK_STATE                               0x11
#define PULSE_SETUP                                  0x12
#define SEND_PULSE                                   0x13
#define SET_PULSE_TIME                               0x14
#define RING_AUX_JACK                                0x15
#define SET_LINE_CODING                              0x20
#define GET_LINE_CODING                              0x21
#define SET_CONTROL_LINE_STATE                       0x22
#define SEND_BREAK                                   0x23
#define SET_RINGER_PARMS                             0x30
#define GET_RINGER_PARMS                             0x31
#define SET_OPERATION_PARMS                          0x32
#define GET_OPERATION_PARMS                          0x33
#define SET_LINE_PARMS                               0x34
#define GET_LINE_PARMS                               0x35
#define DIAL_DIGITS                                  0x36
#define SET_UNIT_PARAMETER                           0x37
#define GET_UNIT_PARAMETER                           0x38
#define CLEAR_UNIT_PARAMETER                         0x39
#define GET_PROFILE                                  0x3a
#define SET_ETHERNET_MULTICAST_FILTERS               0x40
#define SET_ETHERNET_POWER_MANAGEMENT_PATTERN_FILTER 0x41
#define GET_ETHERNET_POWER_MANAGEMENT_PATTERN_FILTER 0x42
#define SET_ETHERNET_PACKET_FILTER                   0x43
#define GET_ETHERNET_STATISTIC                       0x44
#define SET_ATM_DATA_FORMAT                          0x50
#define GET_ATM_DEVICE_STATISTICS                    0x51
#define SET_ATM_DEFAULT_VC                           0x52
#define GET_ATM_VC_STATISTICS                        0x53
#define GET_NTB_PARAMETERS                           0x80
#define GET_NET_ADDRESS                              0x81
#define SET_NET_ADDRESS                              0x82
#define GET_NTB_FORMAT                               0x83
#define SET_NTB_FORMAT                               0x84
#define GET_NTB_INPUT_SIZE                           0x85
#define SET_NTB_INPUT_SIZE                           0x86
#define GET_MAX_DATAGRAM_SIZE                        0x87
#define SET_MAX_DATAGRAM_SIZE                        0x88
#define GET_CRC_MODE                                 0x89
#define SET_CRC_MODE                                 0x8a

static const value_string usb_com_setup_request_vals[] = {
    {SEND_ENCAPSULATED_COMMAND, "SEND ENCAPSULATED COMMAND"},
    {GET_ENCAPSULATED_RESPONSE, "GET ENCAPSULATED RESPONSE"},
    {SET_COMM_FEATURE, "SET COMM FEATURE"},
    {GET_COMM_FEATURE, "GET COMM FEATURE"},
    {CLEAR_COMM_FEATURE, "CLEAR COMM FEATURE"},
    {RESET_FUNCTION, "RESET FUNCTION"},
    {SET_AUX_LINE_STATE, "SET AUX LINE STATE"},
    {SET_HOOK_STATE, "SET HOOK STATE"},
    {PULSE_SETUP, "PULSE SETUP"},
    {SEND_PULSE, "SEND PULSE"},
    {SET_PULSE_TIME, "SET PULSE TIME"},
    {RING_AUX_JACK, "RING AUX JACK"},
    {SET_LINE_CODING, "SET LINE CODING"},
    {GET_LINE_CODING, "GET LINE CODING"},
    {SET_CONTROL_LINE_STATE, "SET CONTROL LINE STATE"},
    {SEND_BREAK, "SEND BREAK"},
    {SET_RINGER_PARMS, "SET RINGER PARMS"},
    {GET_RINGER_PARMS, "GET RINGER PARMS"},
    {SET_OPERATION_PARMS, "SET OPERATION PARMS"},
    {GET_OPERATION_PARMS, "GET OPERATION PARMS"},
    {SET_LINE_PARMS, "SET LINE PARMS"},
    {GET_LINE_PARMS, "GET LINE PARMS"},
    {DIAL_DIGITS, "DIAL DIGITS"},
    {SET_UNIT_PARAMETER, "SET UNIT PARAMETER"},
    {GET_UNIT_PARAMETER, "GET UNIT PARAMETER"},
    {CLEAR_UNIT_PARAMETER, "CLEAR UNIT PARAMETER"},
    {GET_PROFILE, "GET PROFILE"},
    {SET_ETHERNET_MULTICAST_FILTERS, "SET ETHERNET MULTICAST FILTERS"},
    {SET_ETHERNET_POWER_MANAGEMENT_PATTERN_FILTER, "SET ETHERNET POWER MANAGEMENT PATTERN FILTER"},
    {GET_ETHERNET_POWER_MANAGEMENT_PATTERN_FILTER, "GET ETHERNET POWER MANAGEMENT PATTERN FILTER"},
    {SET_ETHERNET_PACKET_FILTER, "SET ETHERNET PACKET FILTER"},
    {GET_ETHERNET_STATISTIC, "GET ETHERNET STATISTIC"},
    {SET_ATM_DATA_FORMAT, "SET ATM DATA FORMAT"},
    {GET_ATM_DEVICE_STATISTICS, "GET ATM DEVICE STATISTICS"},
    {SET_ATM_DEFAULT_VC, "SET ATM DEFAULT VC"},
    {GET_ATM_VC_STATISTICS, "GET ATM VC STATISTICS"},
    {GET_NTB_PARAMETERS, "GET NTB PARAMETERS"},
    {GET_NET_ADDRESS, "GET NET ADDRESS"},
    {SET_NET_ADDRESS, "SET NET ADDRESS"},
    {GET_NTB_FORMAT, "GET NTB FORMAT"},
    {SET_NTB_FORMAT, "SET NTB FORMAT"},
    {GET_NTB_INPUT_SIZE, "GET NTB INPUT SIZE"},
    {SET_NTB_INPUT_SIZE, "SET NTB INPUT SIZE"},
    {GET_MAX_DATAGRAM_SIZE, "GET MAX DATAGRAM SIZE"},
    {SET_MAX_DATAGRAM_SIZE, "SET MAX DATAGRAM SIZE"},
    {GET_CRC_MODE, "GET CRC MODE"},
    {SET_CRC_MODE, "SET CRC MODE"},
    {0, NULL}
};
static value_string_ext usb_com_setup_request_vals_ext = VALUE_STRING_EXT_INIT(usb_com_setup_request_vals);

static int * const usb_com_get_ntb_params_ntb_formats_supported_fields[] = {
    &hf_usb_com_get_ntb_params_ntb_formats_supported_16bit,
    &hf_usb_com_get_ntb_params_ntb_formats_supported_32bit,
    NULL
};

static const value_string usb_com_ntb_format_vals[] = {
    { 0x0000, "NTB-16"},
    { 0x0001, "NTB-32"},
    {0, NULL}
};

static const value_string usb_com_crc_mode_vals[] = {
    { 0x0000, "CRCs shall not be appended"},
    { 0x0001, "CRCs shall be appended"},
    {0, NULL}
};

static int * const ecm_eth_stats[] = {
    &hf_usb_com_descriptor_ecm_eth_stats_reserved,
    &hf_usb_com_descriptor_ecm_eth_stats_xmit_late_collisions,
    &hf_usb_com_descriptor_ecm_eth_stats_xmit_times_crs_lost,
    &hf_usb_com_descriptor_ecm_eth_stats_xmit_heartbeat_failure,
    &hf_usb_com_descriptor_ecm_eth_stats_xmit_underrun,
    &hf_usb_com_descriptor_ecm_eth_stats_rcv_overrun,
    &hf_usb_com_descriptor_ecm_eth_stats_xmit_max_collisions,
    &hf_usb_com_descriptor_ecm_eth_stats_xmit_deferred,
    &hf_usb_com_descriptor_ecm_eth_stats_xmit_more_collisions,
    &hf_usb_com_descriptor_ecm_eth_stats_xmit_one_collision,
    &hf_usb_com_descriptor_ecm_eth_stats_rcv_error_alignment,
    &hf_usb_com_descriptor_ecm_eth_stats_transmit_queue_length,
    &hf_usb_com_descriptor_ecm_eth_stats_rcv_crc_error,
    &hf_usb_com_descriptor_ecm_eth_stats_broadcast_frames_rcv,
    &hf_usb_com_descriptor_ecm_eth_stats_broadcast_bytes_rcv,
    &hf_usb_com_descriptor_ecm_eth_stats_multicast_frames_rcv,
    &hf_usb_com_descriptor_ecm_eth_stats_multicast_bytes_rcv,
    &hf_usb_com_descriptor_ecm_eth_stats_directed_frames_rcv,
    &hf_usb_com_descriptor_ecm_eth_stats_directed_bytes_rcv,
    &hf_usb_com_descriptor_ecm_eth_stats_broadcast_frames_xmit,
    &hf_usb_com_descriptor_ecm_eth_stats_broadcast_bytes_xmit,
    &hf_usb_com_descriptor_ecm_eth_stats_multicast_frames_xmit,
    &hf_usb_com_descriptor_ecm_eth_stats_multicast_bytes_xmit,
    &hf_usb_com_descriptor_ecm_eth_stats_directed_frames_xmit,
    &hf_usb_com_descriptor_ecm_eth_stats_directed_bytes_xmit,
    &hf_usb_com_descriptor_ecm_eth_stats_rcv_no_buffer,
    &hf_usb_com_descriptor_ecm_eth_stats_rcv_error,
    &hf_usb_com_descriptor_ecm_eth_stats_xmit_error,
    &hf_usb_com_descriptor_ecm_eth_stats_rvc_ok,
    &hf_usb_com_descriptor_ecm_eth_stats_xmit_ok,
    NULL
};

static const true_false_string usb_com_ecm_mc_address_filtering = {
    "Imperfect",
    "Perfect"
};

static int * const ecm_nb_mc_filters[] = {
    &hf_usb_com_descriptor_ecm_nb_mc_filters_mc_address_filtering,
    &hf_usb_com_descriptor_ecm_nb_mc_filters_nb_filters_supported,
    NULL
};

#define NETWORK_CONNECTION      0x00
#define RESPONSE_AVAILABLE      0x01
#define AUX_JACK_HOOK_STATE     0x08
#define RING_DETECT             0x09
#define SERIAL_STATE            0x20
#define CALL_STATE_CHANGE       0x28
#define LINE_STATE_CHANGE       0x29
#define CONNECTION_SPEED_CHANGE 0x2a

static const value_string usb_com_interrupt_notif_code_vals[] = {
    {NETWORK_CONNECTION, "NETWORK CONNECTION"},
    {RESPONSE_AVAILABLE, "RESPONSE AVAILABLE"},
    {AUX_JACK_HOOK_STATE, "AUX JACK HOOK STATE"},
    {RING_DETECT, "RING DETECT"},
    {SERIAL_STATE, "SERIAL STATE"},
    {CALL_STATE_CHANGE, "CALL STATE CHANGE"},
    {LINE_STATE_CHANGE, "LINE STATE CHANGE"},
    {CONNECTION_SPEED_CHANGE, "CONNECTION SPEED CHANGE"},
    {0, NULL}
};

static const value_string usb_com_interrupt_value_nw_conn_vals[] = {
    {0, "Disconnect"},
    {1, "Connected"},
    {0, NULL}
};

void proto_register_usb_com(void);
void proto_reg_handoff_usb_com(void);

static int
dissect_usb_com_descriptor(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
{
    urb_info_t *urb = (urb_info_t *)data;
    int offset = 0;
    uint8_t type, subtype;
    proto_tree *subtree;
    proto_tree *subtree_capabilities;
    proto_item *subitem_capabilities;

    if (!urb) {
        return 0;
    }

    subtree = proto_tree_add_subtree(tree, tvb, offset, tvb_captured_length(tvb), ett_usb_com, NULL, "COMMUNICATIONS DESCRIPTOR");

    dissect_usb_descriptor_header(subtree, tvb, offset, &usb_com_descriptor_type_vals_ext);
    offset += 2;

    type = tvb_get_uint8(tvb, 1);
    switch (type) {
        case CS_INTERFACE:
            subtype = tvb_get_uint8(tvb, offset);
            proto_tree_add_uint(subtree, hf_usb_com_descriptor_subtype, tvb, offset, 1, subtype);
            offset++;
            switch (subtype) {
                case 0x00:
                    proto_tree_add_item(subtree, hf_usb_com_descriptor_cdc, tvb, offset, 2, ENC_LITTLE_ENDIAN);
                    offset += 2;
                    break;
                case 0x01:
                    subitem_capabilities = proto_tree_add_item(subtree, hf_usb_com_capabilities, tvb, 3, 1, ENC_LITTLE_ENDIAN);
                    subtree_capabilities = proto_item_add_subtree(subitem_capabilities, ett_usb_com_capabilities);

                    proto_tree_add_item(subtree_capabilities, hf_usb_com_descriptor_cm_capabilities_reserved, tvb, 3, 1, ENC_LITTLE_ENDIAN);
                    proto_tree_add_item(subtree_capabilities, hf_usb_com_descriptor_cm_capabilities_call_management_over_data_class_interface, tvb, 3, 1, ENC_LITTLE_ENDIAN);
                    proto_tree_add_item(subtree_capabilities, hf_usb_com_descriptor_cm_capabilities_call_management, tvb, 3, 1, ENC_LITTLE_ENDIAN);

                    proto_tree_add_item(subtree, hf_usb_com_descriptor_cm_data_interface, tvb, 4, 1, ENC_LITTLE_ENDIAN);
                    offset = 5;
                    break;
                case 0x02:
                    subitem_capabilities = proto_tree_add_item(subtree, hf_usb_com_capabilities, tvb, 3, 1, ENC_LITTLE_ENDIAN);
                    subtree_capabilities = proto_item_add_subtree(subitem_capabilities, ett_usb_com_capabilities);

                    proto_tree_add_item(subtree_capabilities, hf_usb_com_descriptor_acm_capabilities_reserved, tvb, 3, 1, ENC_LITTLE_ENDIAN);
                    proto_tree_add_item(subtree_capabilities, hf_usb_com_descriptor_acm_capabilities_network_connection, tvb, 3, 1, ENC_LITTLE_ENDIAN);
                    proto_tree_add_item(subtree_capabilities, hf_usb_com_descriptor_acm_capabilities_send_break, tvb, 3, 1, ENC_LITTLE_ENDIAN);
                    proto_tree_add_item(subtree_capabilities, hf_usb_com_descriptor_acm_capabilities_line_and_state, tvb, 3, 1, ENC_LITTLE_ENDIAN);
                    proto_tree_add_item(subtree_capabilities, hf_usb_com_descriptor_acm_capabilities_comm_features, tvb, 3, 1, ENC_LITTLE_ENDIAN);
                    offset = 4;
                    break;
                case 0x06: {
                    proto_item *control_item;
                    uint32_t k_bus_id;
                    uint32_t k_device_address;
                    uint32_t k_subordinate_id;
                    uint32_t k_frame_number;
                    wmem_tree_key_t key[] = {
                        { .length = 1, .key = &k_bus_id },
                        { .length = 1, .key = &k_device_address },
                        { .length = 1, .key = &k_subordinate_id },
                        { .length = 1, .key = &k_frame_number },
                        { .length = 0, .key = NULL },
                    };
                    controlling_iface_t *master_info = NULL;
                    uint32_t master;

                    k_bus_id = urb->bus_id;
                    k_device_address = urb->device_address;
                    k_frame_number = pinfo->num;

                    control_item = proto_tree_add_item_ret_uint(subtree, hf_usb_com_descriptor_control_interface, tvb, offset, 1, ENC_LITTLE_ENDIAN, &master);

                    if (master != urb->conv->interfaceNum) {
                        expert_add_info(pinfo, control_item, &ei_unexpected_controlling_iface);
                    } else if (!PINFO_FD_VISITED(pinfo)) {
                        master_info = wmem_new(wmem_file_scope(), controlling_iface_t);
                        master_info->interfaceClass = urb->conv->interfaceClass;
                        master_info->interfaceSubclass = urb->conv->interfaceSubclass;
                        master_info->interfaceProtocol = urb->conv->interfaceProtocol;
                    }

                    offset += 1;
                    while (tvb_reported_length_remaining(tvb,offset) > 0) {
                        proto_tree_add_item_ret_uint(subtree, hf_usb_com_descriptor_subordinate_interface, tvb, offset, 1, ENC_LITTLE_ENDIAN, &k_subordinate_id);
                        offset += 1;

                        if (master_info) {
                            wmem_tree_insert32_array(controlling_ifaces, key, master_info);
                        }
                    }
                    break;
                }
                case 0x0f:
                    proto_tree_add_item(subtree, hf_usb_com_descriptor_ecm_mac_address, tvb, offset, 1, ENC_LITTLE_ENDIAN);
                    offset += 1;
                    proto_tree_add_bitmask_with_flags(subtree, tvb, offset, hf_usb_com_descriptor_ecm_eth_stats,
                                                      ett_usb_com_descriptor_ecm_eth_stats, ecm_eth_stats,
                                                      ENC_LITTLE_ENDIAN, BMT_NO_APPEND);
                    offset += 4;
                    proto_tree_add_item(subtree, hf_usb_com_descriptor_ecm_max_segment_size, tvb, offset, 2, ENC_LITTLE_ENDIAN);
                    offset += 2;
                    proto_tree_add_bitmask_with_flags(subtree, tvb, offset, hf_usb_com_descriptor_ecm_nb_mc_filters,
                                                      ett_usb_com_descriptor_ecm_nb_mc_filters, ecm_nb_mc_filters,
                                                      ENC_LITTLE_ENDIAN, BMT_NO_APPEND);
                    offset += 2;
                    proto_tree_add_item(subtree, hf_usb_com_descriptor_ecm_nb_power_filters, tvb, offset, 1, ENC_LITTLE_ENDIAN);
                    offset += 1;
                    break;
                case 0x1b:
                case 0x1c:
                    offset = call_dissector_only(mbim_descriptor_handle, tvb, pinfo, subtree, data);
                    break;
                default:
                    break;
            }
            break;
        case CS_ENDPOINT:
        default:
            break;
    }

    if (tvb_reported_length_remaining(tvb, offset) > 0) {
        proto_tree_add_item(subtree, hf_usb_com_descriptor_payload, tvb, offset, -1, ENC_NA);
    }
    return tvb_captured_length(tvb);
}

static int
dissect_usb_com_get_ntb_params(tvbuff_t *tvb, proto_tree *tree, int base_offset)
{
    int offset = base_offset;

    proto_tree_add_item(tree, hf_usb_com_get_ntb_params_length, tvb, offset, 2, ENC_LITTLE_ENDIAN);
    offset += 2;
    proto_tree_add_bitmask(tree, tvb, offset, hf_usb_com_get_ntb_params_ntb_formats_supported, ett_usb_com_bitmap,
                           usb_com_get_ntb_params_ntb_formats_supported_fields, ENC_LITTLE_ENDIAN);
    offset += 2;
    proto_tree_add_item(tree, hf_usb_com_get_ntb_params_ntb_in_max_size, tvb, offset, 4, ENC_LITTLE_ENDIAN);
    offset += 4;
    proto_tree_add_item(tree, hf_usb_com_get_ntb_params_ndp_in_divisor, tvb, offset, 2, ENC_LITTLE_ENDIAN);
    offset += 2;
    proto_tree_add_item(tree, hf_usb_com_get_ntb_params_ndp_in_payload_remainder, tvb, offset, 2, ENC_LITTLE_ENDIAN);
    offset += 2;
    proto_tree_add_item(tree, hf_usb_com_get_ntb_params_ndp_in_alignment, tvb, offset, 2, ENC_LITTLE_ENDIAN);
    offset += 2;
    proto_tree_add_item(tree, hf_usb_com_get_ntb_params_reserved, tvb, offset, 2, ENC_LITTLE_ENDIAN);
    offset += 2;
    proto_tree_add_item(tree, hf_usb_com_get_ntb_params_ntb_out_max_size, tvb, offset, 4, ENC_LITTLE_ENDIAN);
    offset += 4;
    proto_tree_add_item(tree, hf_usb_com_get_ntb_params_ndp_out_divisor, tvb, offset, 2, ENC_LITTLE_ENDIAN);
    offset += 2;
    proto_tree_add_item(tree, hf_usb_com_get_ntb_params_ndp_out_payload_remainder, tvb, offset, 2, ENC_LITTLE_ENDIAN);
    offset += 2;
    proto_tree_add_item(tree, hf_usb_com_get_ntb_params_ndp_out_alignment, tvb, offset, 2, ENC_LITTLE_ENDIAN);
    offset += 2;
    proto_tree_add_item(tree, hf_usb_com_get_ntb_params_ntb_out_max_datagrams, tvb, offset, 2, ENC_LITTLE_ENDIAN);
    offset += 2;

    return offset;
}

static int
dissect_usb_com_ntb_input_size(tvbuff_t *tvb, proto_tree *tree, int base_offset, bool is_set)
{
    int offset = base_offset;

    proto_tree_add_item(tree, is_set ? hf_usb_com_set_ntb_input_size_ntb_in_max_size :
                        hf_usb_com_get_ntb_input_size_ntb_in_max_size, tvb, offset, 4, ENC_LITTLE_ENDIAN);
    offset += 4;
    if (tvb_reported_length_remaining(tvb, offset) > 0) {
        proto_tree_add_item(tree, is_set ? hf_usb_com_set_ntb_input_size_ntb_in_max_datagrams :
                            hf_usb_com_get_ntb_input_size_ntb_in_max_datagrams, tvb, offset, 2, ENC_LITTLE_ENDIAN);
        offset += 2;
        proto_tree_add_item(tree, is_set ? hf_usb_com_set_ntb_input_size_reserved :
                            hf_usb_com_get_ntb_input_size_reserved, tvb, offset, 2, ENC_LITTLE_ENDIAN);
        offset += 2;
    }

    return offset;
}

static int
dissect_usb_com_control(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
{
    urb_info_t *urb = (urb_info_t *)data;
    usb_trans_info_t *usb_trans_info;
    proto_tree *subtree;
    proto_item *ti;
    int offset = 0;
    bool is_request;

    if (tvb_reported_length(tvb) == 0) {
        return 0;
    }

    col_set_str(pinfo->cinfo, COL_PROTOCOL, "USBCOM");

    ti = proto_tree_add_item(tree, proto_usb_com, tvb, 0, -1, ENC_NA);
    subtree = proto_item_add_subtree(ti, ett_usb_com);

    if (urb) {
        usb_trans_info = urb->usb_trans_info;

        ti = proto_tree_add_uint(subtree, hf_usb_com_control_subclass, tvb, 0, 0,
                                 urb->conv->interfaceSubclass);
        proto_item_set_generated(ti);

        is_request = (pinfo->srcport==NO_ENDPOINT);
        col_add_fstr(pinfo->cinfo, COL_INFO, "%s %s",
        val_to_str_ext(usb_trans_info->setup.request, &usb_com_setup_request_vals_ext, "Unknown type %x"),
            is_request ? "Request" : "Response");

        if (is_request) {
            proto_tree_add_item(subtree, hf_usb_com_control_request_code, tvb, offset, 1, ENC_LITTLE_ENDIAN);
            offset += 1;
            proto_tree_add_item(subtree, hf_usb_com_control_value, tvb, offset, 2, ENC_LITTLE_ENDIAN);
            offset += 2;
            proto_tree_add_item(subtree, hf_usb_com_control_index, tvb, offset, 2, ENC_LITTLE_ENDIAN);
            offset += 2;
            proto_tree_add_item(subtree, hf_usb_com_control_length, tvb, offset, 2, ENC_LITTLE_ENDIAN);
            offset += 2;
        } else {
            ti = proto_tree_add_uint(subtree, hf_usb_com_control_response_code, tvb, 0, 0,
                                     usb_trans_info->setup.request);
            proto_item_set_generated(ti);
        }

        switch (usb_trans_info->setup.request)
        {
            case SEND_ENCAPSULATED_COMMAND:
                if ((urb->conv->interfaceSubclass == COM_SUBCLASS_MBIM) && is_request) {
                    tvbuff_t *mbim_tvb = tvb_new_subset_remaining(tvb, offset);
                    offset += call_dissector_only(mbim_control_handle, mbim_tvb, pinfo, tree, urb);
                }
                break;
            case GET_ENCAPSULATED_RESPONSE:
                if ((urb->conv->interfaceSubclass == COM_SUBCLASS_MBIM) && !is_request) {
                    offset += call_dissector_only(mbim_control_handle, tvb, pinfo, tree, urb);
                }
                break;
            case GET_NTB_PARAMETERS:
                if (!is_request) {
                    offset = dissect_usb_com_get_ntb_params(tvb, subtree, offset);
                }
                break;
            case GET_NET_ADDRESS:
                if (!is_request) {
                    proto_tree_add_item(subtree, hf_usb_com_get_net_address_eui48, tvb, offset, 6, ENC_NA);
                    offset += 6;
                }
                break;
            case SET_NET_ADDRESS:
                if (is_request) {
                    proto_tree_add_item(subtree, hf_usb_com_set_net_address_eui48, tvb, offset, 6, ENC_NA);
                    offset += 6;
                }
                break;
            case GET_NTB_FORMAT:
                if (!is_request) {
                    proto_tree_add_item(subtree, hf_usb_com_get_ntb_format_ntb_format, tvb, offset, 2, ENC_LITTLE_ENDIAN);
                    offset += 2;
                }
                break;
            case SET_NTB_FORMAT:
                if (is_request) {
                    proto_tree_add_item(subtree, hf_usb_com_set_ntb_format_ntb_format, tvb, offset-6, 2, ENC_LITTLE_ENDIAN);
                }
                break;
            case GET_NTB_INPUT_SIZE:
                if (!is_request) {
                    offset = dissect_usb_com_ntb_input_size(tvb, subtree, offset, false);
                }
                break;
            case SET_NTB_INPUT_SIZE:
                if (!is_request) {
                    offset = dissect_usb_com_ntb_input_size(tvb, subtree, offset, true);
                }
                break;
            case GET_MAX_DATAGRAM_SIZE:
                if (!is_request) {
                    proto_tree_add_item(subtree, hf_usb_com_get_max_datagram_size_size, tvb, offset, 2, ENC_LITTLE_ENDIAN);
                    offset += 2;
                }
                break;
            case SET_MAX_DATAGRAM_SIZE:
                if (is_request) {
                    proto_tree_add_item(subtree, hf_usb_com_set_max_datagram_size_size, tvb, offset, 2, ENC_LITTLE_ENDIAN);
                    offset += 2;
                }
                break;
            case GET_CRC_MODE:
                if (!is_request) {
                    proto_tree_add_item(subtree, hf_usb_com_get_crc_mode_crc_mode, tvb, offset, 2, ENC_LITTLE_ENDIAN);
                    offset += 2;
                }
                break;
            case SET_CRC_MODE:
                if (is_request) {
                    proto_tree_add_item(subtree, hf_usb_com_set_crc_mode_crc_mode, tvb, offset-6, 2, ENC_LITTLE_ENDIAN);
                }
                break;
            default:
                break;
        }
    }

    if (tvb_reported_length_remaining(tvb, offset) > 0) {
        proto_tree_add_item(subtree, hf_usb_com_control_payload, tvb, offset, -1, ENC_NA);
    }
    return tvb_captured_length(tvb);
}

static int
dissect_usb_com_bulk(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
{
    urb_info_t *urb = (urb_info_t *)data;
    usb_conv_info_t *usb_conv_info;
    cdc_data_conv_t *cdc_data_info;
    uint32_t k_bus_id;
    uint32_t k_device_address;
    uint32_t k_subordinate_id;
    wmem_tree_key_t key[] = {
        { .length = 1, .key = &k_bus_id },
        { .length = 1, .key = &k_device_address },
        { .length = 1, .key = &k_subordinate_id },
        { .length = 0, .key = NULL },
    };
    wmem_tree_t *wmem_tree;
    controlling_iface_t *master_iface = NULL;
    proto_tree *subtree;
    proto_item *item;

    if (!urb || !urb->conv) {
        return 0;
    }

    usb_conv_info = urb->conv;

    if ((usb_conv_info->interfaceClass != IF_CLASS_CDC_DATA) || (usb_conv_info->interfaceSubclass != 0)) {
        /* As per Communications Device Class Revision 1.2 subclass is currently unused for CDC Data and should be zero
         * If it is not, then we are either dealing with malformed descriptor or a new CDC Revision.
         */
        return 0;
    }

    /* Generic handling to allow follow stream functionality regardless if data
     * is passed to higher layer dissector or not.
     */
    cdc_data_info = (cdc_data_conv_t *)usb_conv_info->class_data;
    if (!cdc_data_info) {
        cdc_data_info = wmem_new(wmem_file_scope(), cdc_data_conv_t);
        cdc_data_info->stream = cdc_data_stream_count++;
        usb_conv_info->class_data = cdc_data_info;
        usb_conv_info->class_data_type = USB_CONV_CDC_DATA;
    } else if (usb_conv_info->class_data_type != USB_CONV_CDC_DATA) {
        /* Don't dissect if another USB type is in the conversation */
        return 0;
    }

    col_set_str(pinfo->cinfo, COL_PROTOCOL, "USBCOM");

    item = proto_tree_add_item(tree, proto_usb_com, tvb, 0, -1, ENC_NA);
    subtree = proto_item_add_subtree(item, ett_usb_com);

    item = proto_tree_add_uint(subtree, hf_usb_com_data_stream, tvb, 0, 0, cdc_data_info->stream);
    proto_item_set_generated(item);

    if (pinfo->p2p_dir == P2P_DIR_RECV) {
        proto_tree_add_item(subtree, hf_usb_com_data_in_payload, tvb, 0, -1, ENC_NA);
    } else {
        proto_tree_add_item(subtree, hf_usb_com_data_out_payload, tvb, 0, -1, ENC_NA);
    }

    if (have_tap_listener(cdc_data_follow_tap)) {
        tap_queue_packet(cdc_data_follow_tap, pinfo, tvb);
    }

    k_bus_id = urb->bus_id;
    k_device_address = urb->device_address;
    k_subordinate_id = usb_conv_info->interfaceNum;

    wmem_tree = (wmem_tree_t*)wmem_tree_lookup32_array(controlling_ifaces, key);
    if (wmem_tree) {
        master_iface = (controlling_iface_t *)wmem_tree_lookup32_le(wmem_tree, pinfo->num);
    }

    if (master_iface) {
        if (master_iface->interfaceClass == IF_CLASS_COMMUNICATIONS) {
            if ((master_iface->interfaceSubclass == COM_SUBCLASS_ENCM) &&
                (master_iface->interfaceProtocol == 0) &&
                (usb_conv_info->interfaceProtocol == 0)) {
                /* Ethernet without FCS */
                return call_dissector_only(eth_withoutfcs_handle, tvb, pinfo, tree, NULL);
            }
        }
    }


    switch (usb_conv_info->interfaceProtocol) {
        case 0x01: /* Network Transfer Block */
        case 0x02: /* Network Transfer Block (IP + DSS) */
            return call_dissector_only(mbim_bulk_handle, tvb, pinfo, tree, NULL);
        default:
            break;
    }

    /* Unknown (class, subclass, protocol) tuple. No further dissection. */
    return tvb_captured_length(tvb);
}

static int
dissect_usb_com_interrupt(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
    proto_tree *subtree;
    proto_item *it;
    uint32_t notif_code;
    int offset = 0;

    col_set_str(pinfo->cinfo, COL_PROTOCOL, "USBCOM");

    it = proto_tree_add_item(tree, proto_usb_com, tvb, 0, -1, ENC_NA);
    subtree = proto_item_add_subtree(it, ett_usb_com);

    proto_tree_add_item(subtree, hf_usb_com_interrupt_request_type, tvb, offset, 1, ENC_LITTLE_ENDIAN);
    offset++;
    proto_tree_add_item_ret_uint(subtree, hf_usb_com_interrupt_notif_code, tvb, offset, 1, ENC_LITTLE_ENDIAN, &notif_code);
    offset++;
    col_add_str(pinfo->cinfo, COL_INFO, val_to_str(notif_code, usb_com_interrupt_notif_code_vals, "Unknown type %x"));
    switch (notif_code) {
        case NETWORK_CONNECTION:
            proto_tree_add_item(subtree, hf_usb_com_interrupt_value_nw_conn, tvb, offset, 2, ENC_LITTLE_ENDIAN);
            offset += 2;
            proto_tree_add_item(subtree, hf_usb_com_interrupt_index, tvb, offset, 2, ENC_LITTLE_ENDIAN);
            offset += 2;
            proto_tree_add_item(subtree, hf_usb_com_interrupt_length, tvb, offset, 2, ENC_LITTLE_ENDIAN);
            offset += 2;
            break;
        case RESPONSE_AVAILABLE:
            proto_tree_add_item(subtree, hf_usb_com_interrupt_value, tvb, offset, 2, ENC_LITTLE_ENDIAN);
            offset += 2;
            proto_tree_add_item(subtree, hf_usb_com_interrupt_index, tvb, offset, 2, ENC_LITTLE_ENDIAN);
            offset += 2;
            proto_tree_add_item(subtree, hf_usb_com_interrupt_length, tvb, offset, 2, ENC_LITTLE_ENDIAN);
            offset += 2;
            break;
        case CONNECTION_SPEED_CHANGE:
            proto_tree_add_item(subtree, hf_usb_com_interrupt_value, tvb, offset, 2, ENC_LITTLE_ENDIAN);
            offset += 2;
            proto_tree_add_item(subtree, hf_usb_com_interrupt_index, tvb, offset, 2, ENC_LITTLE_ENDIAN);
            offset += 2;
            proto_tree_add_item(subtree, hf_usb_com_interrupt_length, tvb, offset, 2, ENC_LITTLE_ENDIAN);
            offset += 2;
            proto_tree_add_item(subtree, hf_usb_com_interrupt_dl_bitrate, tvb, offset, 4, ENC_LITTLE_ENDIAN);
            offset += 4;
            proto_tree_add_item(subtree, hf_usb_com_interrupt_ul_bitrate, tvb, offset, 4, ENC_LITTLE_ENDIAN);
            offset += 4;
            break;
        default:
            break;
    }

    if (tvb_reported_length_remaining(tvb, offset) > 0) {
        proto_tree_add_item(subtree, hf_usb_com_interrupt_payload, tvb, offset, -1, ENC_NA);
    }
    return tvb_captured_length(tvb);
}

static cdc_data_conv_t *get_cdc_data_conv(packet_info *pinfo)
{
    conversation_t *conversation;
    usb_conv_info_t *usb_conv_info;

    if (pinfo->ptype != PT_USB) {
        return NULL;
    }

    conversation = find_conversation(pinfo->num, &pinfo->src, &pinfo->dst, CONVERSATION_USB,
                                     pinfo->srcport, pinfo->destport, 0);
    if (!conversation) {
        return NULL;
    }

    usb_conv_info = (usb_conv_info_t *)conversation_get_proto_data(conversation, proto_usb);
    if (!usb_conv_info || (usb_conv_info->class_data_type != USB_CONV_CDC_DATA)) {
        return NULL;
    }

    return (cdc_data_conv_t *)usb_conv_info->class_data;
}

static char *cdc_data_follow_conv_filter(epan_dissect_t *edt _U_, packet_info *pinfo, unsigned *stream, unsigned *sub_stream _U_)
{
    cdc_data_conv_t *cdc_data_info;

    cdc_data_info = get_cdc_data_conv(pinfo);
    if (cdc_data_info) {
        *stream = cdc_data_info->stream;
        return ws_strdup_printf("usbcom.data.stream eq %u", cdc_data_info->stream);
    }

    return NULL;
}

static char *cdc_data_follow_index_filter(unsigned stream, unsigned sub_stream _U_)
{
    return ws_strdup_printf("usbcom.data.stream eq %u", stream);
}

static char *cdc_data_follow_address_filter(address *src_addr _U_, address *dst_addr _U_, int src_port _U_, int dst_port _U_)
{
    /* We always just filter stream based on an arbitrarily generated index. */
    return NULL;
}

static char *cdc_data_port_to_display(wmem_allocator_t *allocator, unsigned port)
{
    return wmem_strdup(allocator, port == NO_ENDPOINT ? "host" : "device");
}

static tap_packet_status
follow_cdc_data_tap_listener(void *tapdata, packet_info *pinfo, epan_dissect_t *edt _U_,
                             const void *data, tap_flags_t flags _U_)
{
    follow_record_t *follow_record;
    follow_info_t *follow_info = (follow_info_t *)tapdata;
    tvbuff_t *tvb = (tvbuff_t *)data;
    uint32_t data_length = tvb_captured_length(tvb);
    bool is_server;

    if (follow_info->client_port == 0) {
        /* XXX: Client/Server does not quite match how USB works. Simply assume
         * that host is "server" but it is important to note that client port
         * will be set to either IN or OUT endpoint (whichever transmits data
         * first). Client "receive" is OUT endpoint while client "transmit" is
         * IN endpoint. The "other end" is always host.
         */
        if (pinfo->srcport == NO_ENDPOINT) {
            follow_info->client_port = pinfo->destport;
            copy_address(&follow_info->client_ip, &pinfo->dst);
            follow_info->server_port = pinfo->srcport;
            copy_address(&follow_info->server_ip, &pinfo->src);
        } else {
            follow_info->client_port = pinfo->srcport;
            copy_address(&follow_info->client_ip, &pinfo->src);
            follow_info->server_port = pinfo->destport;
            copy_address(&follow_info->server_ip, &pinfo->dst);
        }
    }

    is_server = pinfo->srcport == NO_ENDPOINT;

    follow_record = g_new0(follow_record_t, 1);
    follow_record->is_server = is_server;
    follow_record->packet_num = pinfo->fd->num;
    follow_record->abs_ts = pinfo->fd->abs_ts;
    follow_record->data = g_byte_array_append(g_byte_array_new(),
                                              tvb_get_ptr(tvb, 0, data_length),
                                              data_length);

    follow_info->bytes_written[is_server] += follow_record->data->len;
    follow_info->payload = g_list_prepend(follow_info->payload, follow_record);

    return TAP_PACKET_DONT_REDRAW;
}

static uint32_t get_cdc_data_stream_count(void)
{
    return cdc_data_stream_count;
}

static void
usb_com_cleanup_data(void)
{
    cdc_data_stream_count = 0;
}

void
proto_register_usb_com(void)
{
    static hf_register_info hf[] = {
        { &hf_usb_com_descriptor_subtype,
            { "Descriptor Subtype", "usbcom.descriptor.subtype", FT_UINT8, BASE_HEX|BASE_EXT_STRING,
              &usb_com_descriptor_subtype_vals_ext, 0, NULL, HFILL }},
        { &hf_usb_com_descriptor_cdc,
            { "CDC", "usbcom.descriptor.cdc", FT_UINT16, BASE_HEX,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_descriptor_payload,
            { "Payload", "usbcom.descriptor.payload", FT_BYTES, BASE_NONE,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_control_subclass,
            { "Subclass", "usbcom.control.subclass", FT_UINT8, BASE_HEX|BASE_EXT_STRING,
              &ext_usb_com_subclass_vals, 0, NULL, HFILL }},
        { &hf_usb_com_control_request_code,
            { "Request Code", "usbcom.control.request_code", FT_UINT8, BASE_HEX|BASE_EXT_STRING,
              &usb_com_setup_request_vals_ext, 0, NULL, HFILL }},
        { &hf_usb_com_control_value,
            { "Value", "usbcom.control.value", FT_UINT16, BASE_DEC,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_control_index,
            { "Index", "usbcom.control.index", FT_UINT16, BASE_DEC,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_control_length,
            { "Length", "usbcom.control.length", FT_UINT16, BASE_DEC,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_control_response_code,
            { "Response Code", "usbcom.control.response_code", FT_UINT8, BASE_HEX|BASE_EXT_STRING,
              &usb_com_setup_request_vals_ext, 0, NULL, HFILL }},
        { &hf_usb_com_get_ntb_params_length,
            { "Length", "usbcom.control.get_ntb_params.length", FT_UINT16, BASE_DEC,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_get_ntb_params_ntb_formats_supported,
            { "NTB Formats Supported", "usbcom.control.get_ntb_params.ntb_formats_supported", FT_UINT16, BASE_HEX,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_get_ntb_params_ntb_formats_supported_16bit,
            { "16-bit NTB", "usbcom.control.get_ntb_params.ntb_formats_supported.16bit", FT_BOOLEAN, 16,
              TFS(&tfs_supported_not_supported), 0x0001, NULL, HFILL }},
        { &hf_usb_com_get_ntb_params_ntb_formats_supported_32bit,
            { "32-bit NTB", "usbcom.control.get_ntb_params.ntb_formats_supported.32bit", FT_BOOLEAN, 16,
              TFS(&tfs_supported_not_supported), 0x0002, NULL, HFILL }},
        { &hf_usb_com_get_ntb_params_ntb_in_max_size,
            { "NTB IN Max Size", "usbcom.control.get_ntb_params.ntb_in_max_size", FT_UINT32, BASE_DEC,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_get_ntb_params_ndp_in_divisor,
            { "NDP IN Divisor", "usbcom.control.get_ntb_params.ndp_in_divisor", FT_UINT16, BASE_DEC,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_get_ntb_params_ndp_in_payload_remainder,
            { "NDP IN Payload Remainder", "usbcom.control.get_ntb_params.ndp_in_payload_remainder", FT_UINT16, BASE_DEC,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_get_ntb_params_ndp_in_alignment,
            { "NDP IN Alignment", "usbcom.control.get_ntb_params.ndp_in_alignment", FT_UINT16, BASE_DEC,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_get_ntb_params_reserved,
            { "Reserved", "usbcom.control.get_ntb_params.reserved", FT_UINT16, BASE_HEX,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_get_ntb_params_ntb_out_max_size,
            { "NTB OUT Max Size", "usbcom.control.get_ntb_params.ntb_out_max_size", FT_UINT32, BASE_DEC,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_get_ntb_params_ndp_out_divisor,
            { "NDP OUT Divisor", "usbcom.control.get_ntb_params.ndp_out_divisor", FT_UINT16, BASE_DEC,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_get_ntb_params_ndp_out_payload_remainder,
            { "NDP OUT Payload Remainder", "usbcom.control.get_ntb_params.ndp_out_payload_remainder", FT_UINT16, BASE_DEC,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_get_ntb_params_ndp_out_alignment,
            { "NDP OUT Alignment", "usbcom.control.get_ntb_params.ndp_out_alignment", FT_UINT16, BASE_DEC,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_get_ntb_params_ntb_out_max_datagrams,
            { "NTB OUT Max Datagrams", "usbcom.control.get_ntb_params.ntb_out_max_datagrams", FT_UINT16, BASE_DEC,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_get_net_address_eui48,
            { "EUI-48", "usbcom.control.get_net_address.eui48", FT_ETHER, BASE_NONE,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_set_net_address_eui48,
            { "EUI-48", "usbcom.control.set_net_address.eui48", FT_ETHER, BASE_NONE,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_get_ntb_format_ntb_format,
            { "NTB Format", "usbcom.control.get_net_address.ntb_format", FT_UINT16, BASE_HEX,
              VALS(usb_com_ntb_format_vals), 0, NULL, HFILL }},
        { &hf_usb_com_set_ntb_format_ntb_format,
            { "NTB Format", "usbcom.control.set_net_address.ntb_format", FT_UINT16, BASE_HEX,
              VALS(usb_com_ntb_format_vals), 0, NULL, HFILL }},
        { &hf_usb_com_get_ntb_input_size_ntb_in_max_size,
            { "NTB IN Max Size", "usbcom.control.get_ntb_input_size.ntb_in_max_size", FT_UINT32, BASE_DEC,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_get_ntb_input_size_ntb_in_max_datagrams,
            { "NTB IN Max Datagrams", "usbcom.control.get_ntb_input_size.ntb_in_max_datagrams", FT_UINT16, BASE_DEC,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_get_ntb_input_size_reserved,
            { "Reserved", "usbcom.control.get_ntb_input_size.reserved", FT_UINT16, BASE_HEX,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_set_ntb_input_size_ntb_in_max_size,
            { "NTB IN Max Size", "usbcom.control.set_ntb_input_size.ntb_in_max_size", FT_UINT32, BASE_DEC,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_set_ntb_input_size_ntb_in_max_datagrams,
            { "NTB IN Max Datagrams", "usbcom.control.set_ntb_input_size.ntb_in_max_datagrams", FT_UINT16, BASE_DEC,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_set_ntb_input_size_reserved,
            { "Reserved", "usbcom.control.set_ntb_input_size.reserved", FT_UINT16, BASE_HEX,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_get_max_datagram_size_size,
            { "Max Datagram Size", "usbcom.control.get_max_datagram_size.size", FT_UINT16, BASE_DEC,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_set_max_datagram_size_size,
            { "Max Datagram Size", "usbcom.control.set_max_datagram_size.size", FT_UINT16, BASE_DEC,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_get_crc_mode_crc_mode,
            { "CRC Mode", "usbcom.control.get_crc_mode.crc_mode", FT_UINT16, BASE_HEX,
              VALS(usb_com_crc_mode_vals), 0, NULL, HFILL }},
        { &hf_usb_com_set_crc_mode_crc_mode,
            { "CRC Mode", "usbcom.control.set_crc_mode.crc_mode", FT_UINT16, BASE_HEX,
              VALS(usb_com_crc_mode_vals), 0, NULL, HFILL }},
        { &hf_usb_com_control_payload,
            { "Payload", "usbcom.control.payload", FT_BYTES, BASE_NONE,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_capabilities,
            { "bmCapabilities", "usbcom.descriptor.capabilities", FT_UINT8, BASE_HEX,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_descriptor_acm_capabilities_reserved,
            { "Reserved", "usbcom.descriptor.acm.capabilities.reserved", FT_UINT8, BASE_HEX,
              NULL, 0xF0, NULL, HFILL }},
        { &hf_usb_com_descriptor_acm_capabilities_network_connection,
            { "Network_Connection", "usbcom.descriptor.acm.capabilities.network_connection", FT_BOOLEAN, 8,
              TFS(&tfs_supported_not_supported), 0x08, NULL, HFILL }},
        { &hf_usb_com_descriptor_acm_capabilities_send_break,
            { "Send_Break", "usbcom.descriptor.acm.capabilities.send_break", FT_BOOLEAN, 8,
              TFS(&tfs_supported_not_supported), 0x04, NULL, HFILL }},
        { &hf_usb_com_descriptor_acm_capabilities_line_and_state,
            { "Line Requests and State Notification", "usbcom.descriptor.acm.capabilities.line_and_state", FT_BOOLEAN, 8,
              TFS(&tfs_supported_not_supported), 0x02, NULL, HFILL }},
        { &hf_usb_com_descriptor_acm_capabilities_comm_features,
            { "Comm Features Combinations", "usbcom.descriptor.acm.capabilities.comm_features", FT_BOOLEAN, 8,
              TFS(&tfs_supported_not_supported), 0x01, NULL, HFILL }},
        { &hf_usb_com_descriptor_control_interface,
            { "Control Interface", "usbcom.descriptor.control_interface", FT_UINT8, BASE_HEX,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_descriptor_subordinate_interface,
            { "Subordinate Interface", "usbcom.descriptor.subordinate_interface", FT_UINT8, BASE_HEX,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_descriptor_cm_capabilities_reserved,
            { "Reserved", "usbcom.descriptor.cm.capabilities.reserved", FT_UINT8, BASE_HEX,
              NULL, 0xFC, NULL, HFILL }},
        { &hf_usb_com_descriptor_cm_capabilities_call_management_over_data_class_interface,
            { "Call Management over Data Class Interface", "usbcom.descriptor.cm.capabilities.call_management_over_data_class_interface", FT_BOOLEAN, 8,
              TFS(&tfs_supported_not_supported), 0x02, NULL, HFILL }},
        { &hf_usb_com_descriptor_cm_capabilities_call_management,
            { "Call Management", "usbcom.descriptor.cm.capabilities.call_management", FT_BOOLEAN, 8,
              TFS(&tfs_supported_not_supported), 0x01, NULL, HFILL }},
        { &hf_usb_com_descriptor_cm_data_interface,
            { "Data Interface", "usbcom.descriptor.cm.data_interface", FT_UINT8, BASE_HEX,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_mac_address,
            { "MAC Address", "usbcom.descriptor.ecm.mac_address", FT_UINT8, BASE_HEX,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_eth_stats,
            { "Ethernet Statistics", "usbcom.descriptor.ecm.eth_stats", FT_UINT32, BASE_HEX,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_eth_stats_reserved,
            { "Reserved", "usbcom.descriptor.ecm.eth_stats.reserved", FT_UINT32, BASE_HEX,
              NULL, 0xe0000000, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_eth_stats_xmit_late_collisions,
            { "XMIT Late Collisions", "usbcom.descriptor.ecm.eth_stats.xmit_late_collisions", FT_BOOLEAN, 32,
              TFS(&tfs_supported_not_supported), 0x10000000, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_eth_stats_xmit_times_crs_lost,
            { "XMIT TImes CRS Lost", "usbcom.descriptor.ecm.eth_stats.xmit_times_crs_lost", FT_BOOLEAN, 32,
              TFS(&tfs_supported_not_supported), 0x08000000, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_eth_stats_xmit_heartbeat_failure,
            { "XMIT Heartbeat Failure", "usbcom.descriptor.ecm.eth_stats.xmit_heartbeat_failure", FT_BOOLEAN, 32,
              TFS(&tfs_supported_not_supported), 0x04000000, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_eth_stats_xmit_underrun,
            { "XMIT Underrun", "usbcom.descriptor.ecm.eth_stats.xmit_underrun", FT_BOOLEAN, 32,
              TFS(&tfs_supported_not_supported), 0x02000000, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_eth_stats_rcv_overrun,
            { "RCV Overrun", "usbcom.descriptor.ecm.eth_stats.rcv_overrun", FT_BOOLEAN, 32,
              TFS(&tfs_supported_not_supported), 0x01000000, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_eth_stats_xmit_max_collisions,
            { "XMIT Max Collisions", "usbcom.descriptor.ecm.eth_stats.xmit_max_collisions", FT_BOOLEAN, 32,
              TFS(&tfs_supported_not_supported), 0x00800000, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_eth_stats_xmit_deferred,
            { "XMIT Deferred", "usbcom.descriptor.ecm.eth_stats.xmit_deferred", FT_BOOLEAN, 32,
              TFS(&tfs_supported_not_supported), 0x00400000, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_eth_stats_xmit_more_collisions,
            { "XMIT More Collisions", "usbcom.descriptor.ecm.eth_stats.xmit_more_collisions", FT_BOOLEAN, 32,
              TFS(&tfs_supported_not_supported), 0x00200000, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_eth_stats_xmit_one_collision,
            { "XMIT One Collision", "usbcom.descriptor.ecm.eth_stats.xmit_one_collision", FT_BOOLEAN, 32,
              TFS(&tfs_supported_not_supported), 0x00100000, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_eth_stats_rcv_error_alignment,
            { "RCV Error Alignment", "usbcom.descriptor.ecm.eth_stats.rcv_error_alignment", FT_BOOLEAN, 32,
              TFS(&tfs_supported_not_supported), 0x00080000, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_eth_stats_transmit_queue_length,
            { "Transmit Queue Length", "usbcom.descriptor.ecm.eth_stats.transmit_queue_length", FT_BOOLEAN, 32,
              TFS(&tfs_supported_not_supported), 0x00040000, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_eth_stats_rcv_crc_error,
            { "RCV CRC Error", "usbcom.descriptor.ecm.eth_stats.rcv_crc_error", FT_BOOLEAN, 32,
              TFS(&tfs_supported_not_supported), 0x00020000, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_eth_stats_broadcast_frames_rcv,
            { "Broadcast Frames RCV", "usbcom.descriptor.ecm.eth_stats.broadcast_frames_rcv", FT_BOOLEAN, 32,
              TFS(&tfs_supported_not_supported), 0x00010000, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_eth_stats_broadcast_bytes_rcv,
            { "Broadcast Bytes RCV", "usbcom.descriptor.ecm.eth_stats.broadcast_bytes_rcv", FT_BOOLEAN, 32,
              TFS(&tfs_supported_not_supported), 0x00008000, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_eth_stats_multicast_frames_rcv,
            { "Multicast Frames RCV", "usbcom.descriptor.ecm.eth_stats.multicast_frames_rcv", FT_BOOLEAN, 32,
              TFS(&tfs_supported_not_supported), 0x00004000, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_eth_stats_multicast_bytes_rcv,
            { "Multicast Bytes RCV", "usbcom.descriptor.ecm.eth_stats.multicast_bytes_rcv", FT_BOOLEAN, 32,
              TFS(&tfs_supported_not_supported), 0x00002000, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_eth_stats_directed_frames_rcv,
            { "Directed Frames RCV", "usbcom.descriptor.ecm.eth_stats.directed_frames_rcv", FT_BOOLEAN, 32,
              TFS(&tfs_supported_not_supported), 0x00001000, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_eth_stats_directed_bytes_rcv,
            { "Directed Bytes RCV", "usbcom.descriptor.ecm.eth_stats.directed_bytes_rcv", FT_BOOLEAN, 32,
              TFS(&tfs_supported_not_supported), 0x00000800, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_eth_stats_broadcast_frames_xmit,
            { "Broadcast Frames XMIT", "usbcom.descriptor.ecm.eth_stats.broadcast_frames_xmit", FT_BOOLEAN, 32,
              TFS(&tfs_supported_not_supported), 0x00000400, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_eth_stats_broadcast_bytes_xmit,
            { "Broadcast Bytes XMIT", "usbcom.descriptor.ecm.eth_stats.broadcast_bytes_xmit", FT_BOOLEAN, 32,
              TFS(&tfs_supported_not_supported), 0x00000200, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_eth_stats_multicast_frames_xmit,
            { "Multicast Frames XMIT", "usbcom.descriptor.ecm.eth_stats.multicast_frames_xmit", FT_BOOLEAN, 32,
              TFS(&tfs_supported_not_supported), 0x00000100, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_eth_stats_multicast_bytes_xmit,
            { "Multicast Bytes XMIT", "usbcom.descriptor.ecm.eth_stats.multicast_bytes_xmit", FT_BOOLEAN, 32,
              TFS(&tfs_supported_not_supported), 0x00000080, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_eth_stats_directed_frames_xmit,
            { "Directed Frames XMIT", "usbcom.descriptor.ecm.eth_stats.directed_frames_xmit", FT_BOOLEAN, 32,
              TFS(&tfs_supported_not_supported), 0x00000040, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_eth_stats_directed_bytes_xmit,
            { "Directed Bytes XMIT", "usbcom.descriptor.ecm.eth_stats.directed_bytes_xmit", FT_BOOLEAN, 32,
              TFS(&tfs_supported_not_supported), 0x00000020, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_eth_stats_rcv_no_buffer,
            { "RCV No Buffer", "usbcom.descriptor.ecm.eth_stats.rcv_no_buffer", FT_BOOLEAN, 32,
              TFS(&tfs_supported_not_supported), 0x00000010, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_eth_stats_rcv_error,
            { "RCV Error", "usbcom.descriptor.ecm.eth_stats.rcv_error", FT_BOOLEAN, 32,
              TFS(&tfs_supported_not_supported), 0x00000008, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_eth_stats_xmit_error,
            { "XMIT Error", "usbcom.descriptor.ecm.eth_stats.xmit_error", FT_BOOLEAN, 32,
              TFS(&tfs_supported_not_supported), 0x00000004, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_eth_stats_rvc_ok,
            { "RCV OK", "usbcom.descriptor.ecm.eth_stats.rvc_ok", FT_BOOLEAN, 32,
              TFS(&tfs_supported_not_supported), 0x00000002, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_eth_stats_xmit_ok,
            { "XMIT OK", "usbcom.descriptor.ecm.eth_stats.xmit_ok", FT_BOOLEAN, 32,
              TFS(&tfs_supported_not_supported), 0x00000001, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_max_segment_size,
            { "Max Segment Size", "usbcom.descriptor.ecm.max_segment_size", FT_UINT16, BASE_DEC,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_nb_mc_filters,
            { "Number MC Filters", "usbcom.descriptor.ecm.nb_mc_filters", FT_UINT16, BASE_HEX,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_nb_mc_filters_mc_address_filtering,
            { "Multicast Address Filtering", "usbcom.descriptor.ecm.nb_mc_filters.mc_address_filtering", FT_BOOLEAN, 16,
              TFS(&usb_com_ecm_mc_address_filtering), 0x8000, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_nb_mc_filters_nb_filters_supported,
            { "Number of Multicast Address Filters Supported", "usbcom.descriptor.ecm.nb_mc_filters.nb_filters_supported", FT_UINT16, BASE_DEC,
              NULL, 0x7fff, NULL, HFILL }},
        { &hf_usb_com_descriptor_ecm_nb_power_filters,
            { "Number Power Filters", "usbcom.descriptor.ecm.nb_power_filters", FT_UINT8, BASE_DEC,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_interrupt_request_type,
            { "Request Type", "usbcom.interrupt.request_type", FT_UINT8, BASE_HEX,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_interrupt_notif_code,
            { "Notification Code", "usbcom.interrupt.notification_code", FT_UINT8, BASE_HEX,
              VALS(usb_com_interrupt_notif_code_vals), 0, NULL, HFILL }},
        { &hf_usb_com_interrupt_value,
            { "Value", "usbcom.interrupt.value", FT_UINT16, BASE_HEX,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_interrupt_value_nw_conn,
            { "Value", "usbcom.interrupt.value", FT_UINT16, BASE_HEX,
              VALS(usb_com_interrupt_value_nw_conn_vals), 0, NULL, HFILL }},
        { &hf_usb_com_interrupt_index,
            { "Index", "usbcom.interrupt.index", FT_UINT16, BASE_DEC,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_interrupt_length,
            { "Length", "usbcom.interrupt.length", FT_UINT16, BASE_DEC,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_interrupt_dl_bitrate,
            { "DL Bitrate", "usbcom.interrupt.conn_speed_change.dl_bitrate", FT_UINT32, BASE_DEC|BASE_UNIT_STRING,
              UNS(&units_bit_sec), 0, NULL, HFILL }},
        { &hf_usb_com_interrupt_ul_bitrate,
            { "UL Bitrate", "usbcom.interrupt.conn_speed_change.ul_bitrate", FT_UINT32, BASE_DEC|BASE_UNIT_STRING,
              UNS(&units_bit_sec), 0, NULL, HFILL }},
        { &hf_usb_com_interrupt_payload,
            { "Payload", "usbcom.interrupt.payload", FT_BYTES, BASE_NONE,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_data_stream,
            { "Stream index", "usbcom.data.stream", FT_UINT32, BASE_DEC,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_data_in_payload,
            { "IN payload", "usbcom.data.in_payload", FT_BYTES, BASE_NONE,
              NULL, 0, NULL, HFILL }},
        { &hf_usb_com_data_out_payload,
            { "OUT payload", "usbcom.data.out_payload", FT_BYTES, BASE_NONE,
              NULL, 0, NULL, HFILL }},
    };

    static int *usb_com_subtrees[] = {
        &ett_usb_com,
        &ett_usb_com_capabilities,
        &ett_usb_com_bitmap,
        &ett_usb_com_descriptor_ecm_eth_stats,
        &ett_usb_com_descriptor_ecm_nb_mc_filters
    };

    static ei_register_info ei[] = {
        { &ei_unexpected_controlling_iface, { "usbcom.descriptor.control_interface.unexpected_iface", PI_MALFORMED, PI_ERROR, "Unexpected controlling interface index (report to wireshark.org)", EXPFILL }},
    };

    expert_module_t* expert_usb_com;

    controlling_ifaces = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope());

    proto_usb_com = proto_register_protocol("USB Communications and CDC Control", "USBCOM", "usbcom");
    proto_register_field_array(proto_usb_com, hf, array_length(hf));
    proto_register_subtree_array(usb_com_subtrees, array_length(usb_com_subtrees));

    usb_com_descriptor_handle = register_dissector("usbcom.descriptor", dissect_usb_com_descriptor, proto_usb_com);
    usb_com_control_handle = register_dissector("usbcom.control", dissect_usb_com_control, proto_usb_com);
    usb_com_bulk_handle = register_dissector("usbcom.bulk", dissect_usb_com_bulk, proto_usb_com);
    usb_com_interrupt_handle = register_dissector("usbcom.interrupt", dissect_usb_com_interrupt, proto_usb_com);

    expert_usb_com = expert_register_protocol(proto_usb_com);
    expert_register_field_array(expert_usb_com, ei, array_length(ei));

    register_cleanup_routine(usb_com_cleanup_data);

    cdc_data_follow_tap = register_tap("cdc_data_follow");
    register_follow_stream(proto_usb_com, "cdc_data_follow", cdc_data_follow_conv_filter, cdc_data_follow_index_filter,
                           cdc_data_follow_address_filter, cdc_data_port_to_display, follow_cdc_data_tap_listener,
                           get_cdc_data_stream_count, NULL);
}

void
proto_reg_handoff_usb_com(void)
{
    dissector_add_uint("usb.descriptor", IF_CLASS_COMMUNICATIONS, usb_com_descriptor_handle);
    dissector_add_uint("usb.control", IF_CLASS_COMMUNICATIONS, usb_com_control_handle);
    dissector_add_uint("usb.bulk", IF_CLASS_CDC_DATA, usb_com_bulk_handle);
    dissector_add_uint("usb.interrupt", IF_CLASS_COMMUNICATIONS, usb_com_interrupt_handle);
    mbim_control_handle = find_dissector_add_dependency("mbim.control", proto_usb_com);
    mbim_descriptor_handle = find_dissector_add_dependency("mbim.descriptor", proto_usb_com);
    mbim_bulk_handle = find_dissector_add_dependency("mbim.bulk", proto_usb_com);
    eth_withoutfcs_handle = find_dissector_add_dependency("eth_withoutfcs", proto_usb_com);

    proto_usb = proto_get_id_by_filter_name("usb");
}

/*
 * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
 *
 * Local variables:
 * c-basic-offset: 4
 * tab-width: 8
 * indent-tabs-mode: nil
 * End:
 *
 * vi: set shiftwidth=4 tabstop=8 expandtab:
 * :indentSize=4:tabSize=8:noTabs=true:
 */