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>