Интерактивная система просмотра системных руководств (man-ов)
ng_UI (4)
>> ng_UI (4) ( FreeBSD man: Специальные файлы /dev/* )
BSD mandoc
NAME
ng_UI
- UI netgraph node type
SYNOPSIS
#include <netgraph/ng_UI.h>
DESCRIPTION
The
UI
node type has two hooks,
upstream
and
downstream
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 on
upstream
Conversely, packets received on
upstream
will have a 0x03 byte prepended to them before being forwarded out on the
downstream
hook.
HOOKS
This node type supports the following hooks:
downstream
Downstream connection.
Packets on this side of the node have a 0x03 as
their first byte.
upstream
Upstream connection.
Packets on this side of the node have the
initial 0x03 byte stripped off.
CONTROL MESSAGES
This node type supports only the generic control messages.
SHUTDOWN
This node shuts down upon receipt of a
NGM_SHUTDOWN
control message, or when both hooks have been disconnected.
