.\" Copyright (c) 2003 Ruslan Ermilov .\" All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .\" $FreeBSD$ .\" .Dd March 1, 2004 .Dt NG_VLAN 4 .Os .Sh NAME .Nm ng_vlan .Nd IEEE 802.1Q VLAN tagging netgraph node type .Sh SYNOPSIS .In sys/types.h .In netgraph.h .In netgraph/ng_vlan.h .Sh DESCRIPTION The .Nm vlan node type multiplexes frames tagged according to the IEEE 802.1Q standard between different hooks. .Pp Each node has two special hooks, .Va downstream and .Va nomatch , and an arbitrary number of .Dq vlan hooks, each associated with a particular VLAN tag. .Pp An .Dv ETHERTYPE_VLAN frame received on the .Va downstream hook with a tag that the node has been configured to filter is sent out the corresponding .Dq vlan hook. If it does not match any of the configured tags, or is not of a type .Dv ETHERTYPE_VLAN , it is sent out the .Va nomatch hook. If the .Va nomatch hook is not connected, the packet is dropped. .Pp An Ethernet frame received on the .Va nomatch hook is passed unmodified to the .Va downstream hook. .Pp An Ethernet frame received on any of the .Dq vlan hooks is tagged accordingly and sent out the .Va downstream hook. .Sh HOOKS This node type supports the following hooks: .Bl -tag -width "Aq Em any valid name" .It Va downstream Typically this hook would be connected to a .Xr ng_ether 4 node, using the .Va lower hook. .It Va nomatch Typically this hook would also be connected to an .Xr ng_ether 4 type node using the .Va upper hook. .It Aq Em "any valid name" Any other hook name will be accepted and should later be associated with a particular tag. Typically this hook would be attached to an .Xr ng_eiface 4 type node using the .Va ether hook. .El .Sh CONTROL MESSAGES This node type supports the generic control messages, plus the following: .Bl -tag -width foo .It Dv NGM_VLAN_ADD_FILTER Pq Ic addfilter Associates a hook with the tag. .It Dv NGM_VLAN_DEL_FILTER Pq Ic delfilter Disassociates a hook from the tag. .It Dv NGM_VLAN_GET_TABLE Pq Ic gettable Returns a table of all hook/tag associations. .El .Sh EXAMPLES .Bd -literal #!/bin/sh ETHER_IF=rl0 ngctl -f- <