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33 .\" Author: Archie Cobbs <archie@FreeBSD.org>
36 .\" $Whistle: ng_iface.8,v 1.5 1999/01/25 23:46:26 archie Exp $
43 .Nd interface netgraph node type
45 .In netgraph/ng_iface.h
49 node is both a netgraph node and a system networking interface.
52 node is created, a new interface appears which is accessible via
55 node interfaces are named
59 When a node is shutdown, the corresponding interface is removed
60 and the interface name becomes available for reuse by future
62 nodes; new nodes always take the first unused interface.
63 The node itself is assigned the same name as its interface, unless the name
64 already exists, in which case the node remains unnamed.
68 node has a single hook corresponding to each supported protocol.
69 Packets transmitted via the interface flow out the corresponding
70 protocol-specific hook.
71 Similarly, packets received on a hook appear on the interface as
72 packets received into the corresponding protocol stack.
73 The currently supported protocols are IP, IPv6, AppleTalk, IPX, ATM,
78 node can be configured as a point-to-point interface or a broadcast interface.
79 The configuration can only be changed when the interface is down.
80 The default mode is point-to-point.
83 nodes support the Berkeley Packet Filter (BPF).
85 This node type supports the following hooks:
87 .Bl -tag -width foobar
89 Transmission and reception of IP packets.
91 Transmission and reception of IPv6 packets.
93 Transmission and reception of AppleTalk packets.
95 Transmission and reception of IPX packets.
97 Transmission and reception of ATM packets.
99 Transmission and reception of NATM packets.
101 Transmission and reception of NS packets.
104 This node type supports the generic control messages, plus the following:
106 .It Dv NGM_IFACE_GET_IFNAME
107 Returns the name of the associated interface as a
108 .Dv NUL Ns -terminated
111 Normally this is the same as the name of the node.
112 .It Dv NGM_IFACE_POINT2POINT
113 Set the interface to point-to-point mode.
114 The interface must not currently be up.
115 .It Dv NGM_IFACE_BROADCAST
116 Set the interface to broadcast mode.
117 The interface must not currently be up.
118 .It Dv NGM_CISCO_GET_IPADDR
119 This message is defined by the
126 This node shuts down upon receipt of a
129 The associated interface is removed and becomes available
134 Unlike most other node types, an
138 go away when all hooks have been disconnected; rather, and explicit
140 control message is required.
150 node type was implemented in
153 .An Archie Cobbs Aq archie@FreeBSD.org