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.

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.

iso

Only present for isochronous transfers.

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.