UI netgraph node type
UI node type has two hooks,
Packets received on
downstream must have 0x03
(indicating unnumbered information) as their first byte; if not the packet is
dropped. This byte is then stripped and the remainder of the packet sent out
Conversely, packets received on
will have a 0x03 byte prepended to them before being forwarded out on the
This node type supports the following hooks:
- Downstream connection. Packets on this side of the node have a 0x03 as
their first byte.
- Upstream connection. Packets on this side of the node have the initial
0x03 byte stripped off.
This node type supports only the generic control messages.
This node shuts down upon receipt of a
control message, or when both hooks have been disconnected.
ng_UI node type was implemented in