NetPacket::USBMon(3p)

NAME
NetPacket::USBMon - Assemble and disassemble USB packets captured via Linux USBMon interface.

VERSION
version 1.7.2

SYNOPSIS
  use NetPacket::USBMon;

  $usb = NetPacket::USBMon->decode($raw_pkt);

DESCRIPTION
"NetPacket::USBMon" is a NetPacket decoder of USB packets captured via Linux USBMon interface.

  Methods

"NetPacket::USBMon->decode([RAW PACKET])"
    Decode a USB packet.

  Instance data
The instance data for the "NetPacket::UDP" object consists of the following fields.

id  An in-kernel address of the USB Request Block (URB). Stays the same for the transaction submission and completion.

    Might be truncatted when reading a 64-bit capture with 32-bit file.

type
    URB type. Character 'S', 'C' or 'E', for constants USB_TYPE_SUBMISSION, USB_TYPE_CALLBACK or USB_TYPE_ERROR.

xfer_type
    Transfer type. USB_XFER_TYPE_ISO, USB_XFER_TYPE_INTR, USB_XFER_TYPE_CONTROL or USB_XFER_TYPE_BULK.

ep  Endpoint identification.

    num Endpoint number.

    dir Transfer direction. "IN" or "OUT".

devnum
    Device address.

busnum
    Bus number.

flag_setup
    Indicates whether setup is present and makes sense.

flag_data
    Indicates whether data is present and makes sense.

ts_sec
    Timestamp seconds since epoch. Subject to truncation with 32-bit Perl, which should be fine until 2038.

ts_usec
    Timestamp microseconds.

status
    URB status. Negative errno.

length
    Length of data (submitted or actual).

len_cap
    Delivered length

setup
    Only present for packets with setup_flag turned on. Some contents are dependent on actual request type.

    bmRequestType
    bRequest
    wValue
    wIndex
    wLength

iso Only present for isochronous transfers.

    error_count
    numdesc

interval
    Isochronous packet response rate.

start_frame
    Only applicable to isochronous transfers.

xfer_flags
    A copy of URB's transfer_flags.

ndesc
    Actual number of isochronous descriptors.

data
    Packet payload.

  Exports

default
    none

exportable
    USB_TYPE_SUBMISSION, USB_TYPE_CALLBACK, USB_TYPE_ERROR, USB_XFER_TYPE_ISO, USB_XFER_TYPE_INTR, USB_XFER_TYPE_CONTROL, USB_XFER_TYPE_BULK, USB_FLAG_SETUP_IRRELEVANT, USB_FLAG_SETUP_RELEVANT, USB_FLAG_DATA_ERROR, USB_FLAG_DATA_INCOMING, USB_FLAG_DATA_OUTGOING, USB_FLAG_DATA_PRESENT, USB_TYPE_VENDOR

tags
    The following tags group together related exportable items.

    ":types"
        USB_TYPE_SUBMISSION, USB_TYPE_CALLBACK, USB_TYPE_ERROR

    ":xfer_types"
        USB_XFER_TYPE_ISO, USB_XFER_TYPE_INTR, USB_XFER_TYPE_CONTROL, USB_XFER_TYPE_BULK

    ":setup_flags"
        USB_FLAG_SETUP_IRRELEVANT, USB_FLAG_SETUP_RELEVANT

    ":data_flags"
        USB_FLAG_DATA_ERROR, USB_FLAG_DATA_INCOMING, USB_FLAG_DATA_OUTGOING, USB_FLAG_DATA_PRESENT

    ":setup_types"
        USB_TYPE_VENDOR

    ":ALL"
        All the above exportable items.

COPYRIGHT
Copyright (c) 2013 Lubomir Rintel.

This module is free software. You can redistribute it and/or modify it under the same terms as Perl itself.

AUTHOR
Lubomir Rintel <lkundrak@v3.sk>