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Author: Archie Cobbs <archie@whistle.com>
$FreeBSD: head/share/man/man4/ng_ether.4 56608 2000-01-25 20:26:52Z archie $
.Dd January 25, 2000 .Dt NG_ETHER 8 .Os FreeBSD .Sh NAME .Nm ng_ether .Nd Ethernet netgraph node type .Sh SYNOPSIS .Fd #include <netgraph/ng_ether.h> .Sh DESCRIPTION The .Nm ether netgraph node type allows Ethernet interfaces to interact with the .Xr netgraph 4 networking subsystem. The kernel must be compiled with d -literal options NETGRAPH .Ed
p for this functionality to be enabled. This causes a netgraph node to be automatically created for each Ethernet interface in the system. The node will have a name equal to the name of the interface, and it will be persistent.
p The Ethernet interface continues to function normally until a connection is made to one of the two supported hooks, .Dv orphans or .Dv divert . The .Dv orphans hook is used to receive Ethernet frames received by the device and having an unknown or unsupported Ethertype. The .Dv divert hook is used to divert .Em all Ethernet frames received by the device; the interface will otherwise appear to go silent until this hook is disconnected.
p Either hook may be used to transmit Ethernet frames by transmitting packets to the hook. In all cases, frames are raw Ethernet frames with the standard 14 byte Ethernet header (but no checksum). .Sh HOOKS This node type supports the following hooks:
p l -tag -width orphans t Dv orphans This hook transmits Ethernet frames received by the device and having an unknown or unsupported Ethertype. Frames received on this hook are written as-is out on the wire. t Dv divert When connected, this hook transmits all Ethernet frames received by the device. Frames received on this hook are written as-is out on the wire. .El .Sh CONTROL MESSAGES This node type supports only the generic control messages. .Sh SHUTDOWN This node is persistent. Upon receipt of a .Dv NGM_SHUTDOWN control message, all hooks are disconnected. .Sh EXAMPLE This command will dump all packets received by the .Dv fxp0 interface to standard output as decoded hex and ASCII: l -literal nghook -a fxp0: divert .El .Sh SEE ALSO .Xr arp 4 , .Xr netgraph 4 , .Xr netintro 4 , .Xr ifconfig 8 , .Xr nghook 8 , .Xr ngctl 8 .Sh AUTHOR .An Julian Elischer Aq julian@freebsd.org