netgraph ether_echo node type
node type reflects all data
and control messages back to the sender. It assumes (and does not check) that
the packet is an ethernet frame, and swaps the source and destination
addresses before echoing it. This node type is used for testing and debugging.
node accepts any request to
connect, regardless of the hook name, as long as the name is unique.
This node type supports only the generic control messages. Any other control
messages are reflected back to the sender.
This node shuts down upon receipt of a
control message, or when all
hooks have been disconnected.
node type was implemented
in FreeBSD 8.0