— netgraph IP input node
node type takes all received packets and queues
them into the IP in input processing subsystem.
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. Other control
messages are silently discarded.
This node shuts down upon receipt of a
control message, or when all hooks have been disconnected.
node type was implemented in
node type should probably keep some sort of