table of contents
|NG_UI(4)||Device Drivers Manual||NG_UI(4)|
ng_UI — 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
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
NGM_SHUTDOWN control message, or when both hooks
have been disconnected.
ng_UI node type was implemented in
Julian Elischer <julian@FreeBSD.org>
|January 19, 1999||Debian|