1 .\" Copyright (c) 2002 Mark Santcroos <marks@ripe.net>
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32 .Nd device netgraph node type
34 .In netgraph/ng_device.h
38 node is both a netgraph node and a system device interface.
41 node is created, a new device entry appears which is accessible via the
42 regular file operators such as
49 The first node is created as
52 .Pa /dev/ngd1 , /dev/ngd2 ,
57 node has a single hook with an arbitrary name.
58 All data coming in over the hook will be presented to the device
61 All data coming in from the device entry by
63 will be forwarded to the hook.
67 node supports the generic control messages, plus the following:
69 .It Dv NGM_DEVICE_GET_DEVNAME
70 Returns the device name corresponding to the node.
71 .It Dv NGM_DEVICE_ETHERALIGN
72 Apply the system ETHER_ALIGN offset to mbufs sent out the node's hook,
73 if running on an architecture that requires strict alignment.
74 Use this option when the data being injected via the device node ultimately
75 ends up being fed into the protocol stack as ethernet packets (e.g., via
80 .\" Additionally, the node accepts
82 .\" from the device entry.
83 .\" These will be encapsulated into
85 .\" messages and send out to the hook.
87 This node shuts down upon receipt of a
89 control message, or upon hook disconnection.
90 The associated device entry is removed and becomes available
100 node type was first implemented in
103 .An Mark Santcroos Aq Mt marks@ripe.net
104 .An Gleb Smirnoff Aq Mt glebius@FreeBSD.org