# Loopback interface

This unit implements a [com/link] that holds a single frame buffer. "beginframe"
yields it, "sendframe" and then marks it for reception and then "readframe"
yields it in a beautiful self-referential dance.

## Usage

This unit provides a "loopback" word which is a [com/link] structure that can be
used as described above. Example:

  needs drv/nic/loop com/net lib/coop
  loopback makeactive
  net$
