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NG_GIF(4)	       FreeBSD Kernel Interfaces Manual		     NG_GIF(4)

NAME
     ng_gif -- generic tunnel interface	netgraph node type

SYNOPSIS
     #include <netgraph/ng_gif.h>

DESCRIPTION
     The ng_gif	netgraph node type allows gif(4) interfaces to interact	with
     the netgraph(4) networking	subsystem.  Once the ng_gif module is loaded
     in	the kernel, a node is automatically created for	each gif(4) interface
     in	the system.  Each node will attempt to name itself with	the same name
     as	the associated interface.  All ng_gif nodes are	persistent for as long
     as	the interface itself exists.

     Two hooks are supported: lower and	orphans.  The hook name	divert may be
     used as an	alias for lower, and is	provided for compatibility with
     ng_ether(4).  In reality the two names represent the same hook.

     The lower hook is a connection to the raw gif(4) device.  When connected,
     all incoming packets are diverted out this	hook.  Writing to this hook
     results in	a raw encapsulated packet being	transmitted by the device.
     Normal outgoing packets are not affected by lower being connected.

     The orphans hook is equivalent to lower, except that only unrecognized
     packets (that would otherwise be discarded) are written to	the hook, and
     normal incoming traffic is	unaffected.  At	most one of orphans and	lower
     may be connected at any time.

     In	all cases, frames are raw packets with the address family of the
     packet attached to	the front.

     When no hooks are connected, packets flow normally	upwards	and downwards.

HOOKS
     This node type supports the following hooks:

     lower    Connection to the	lower device link layer.

     orphans  Like lower, but only receives unrecognized packets.

CONTROL	MESSAGES
     This node type supports only the generic control messages.

EXAMPLES
     This command dumps	all unrecognized packets received by the gif0 inter-
     face to standard output decoded in	hex and	ASCII:

	   nghook -a gif0: orphans

SEE ALSO
     gif(4), netgraph(4), netintro(4), ifconfig(8), ngctl(8), nghook(8)

AUTHORS
     Brooks Davis <brooks@FreeBSD.org>

FreeBSD	10.1		      September	18, 2001		  FreeBSD 10.1

NAME | SYNOPSIS | DESCRIPTION | HOOKS | CONTROL MESSAGES | EXAMPLES | SEE ALSO | AUTHORS

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<https://www.freebsd.org/cgi/man.cgi?query=ng_gif&sektion=4&manpath=FreeBSD+9.0-RELEASE>

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