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Date:      Fri, 26 May 2006 14:24:47 -0700
From:      Julian Elischer <julian@elischer.org>
To:        benjamin@cactus.org
Cc:        freebsd-net@freebsd.org
Subject:   Re: Netgraph: Ethernet interfaces missing from persistent node list
Message-ID:  <4477721F.2010406@elischer.org>
In-Reply-To: <20060526191656.GA15237@linux.cactus.org>
References:  <20060526191656.GA15237@linux.cactus.org>

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benjamin@cactus.org wrote:

>Using ngctl as suggested in the "All About Netgraph" Daemon News
>article (http://people.freebsd.org/~julian/netgraph.html ) by Archie
>Cobbs I get the following output:
>
>root@ntp-2# nghook -a fxp0: divert
>nghook: can't connect to node
>
>root@ntp-2# ngctl list
>There are 1 total nodes:
>  Name: ngctl4352       Type: socket          ID: 00000005   Num hooks: 0
>
>According to the article my four Ethernet interefaces (see ifconfig output below) should display
>as persistent nodes.  Any reason why they do not appear?  I compiled a custom kernel on two separate
>occasions, first to support IPFW/Dummynet, then later, Netgraph.
>
>Thanks,
>Tom Benjamin
>
>##### kernel options added for 1st compile (IPFW)
>options BRIDGE
>options IPFIREWALL
>options IPFIREWALL_VERBOSE
>options IPFIREWALL_VERBOSE_LIMIT
>options DUMMYNET
>options NMBCLUSTERS
>options HZ=1000
>##### kernel options added for 2nd compile (NETGRAPH, plus forgot IPDIVERT in 1st compile)
>options IPDIVERT
>options NETGRAPH
>  
>
You need to also compile in or load the nodes you need.
options NETGRAPH_ETHER (I think)
(I forget the names.. look in LINT)

or
kldload ng_ether to load it dynamically


also, there is no "divert" hook for ng_ether hooks.
hooks for ng-ether are:
lower (to get incoming packets and accept outgoing packets )(connects to 
the physical interface)
upper (to get outgoing packets and acceept incoming packets)(connects to 
the protocol mux/demux)
orphan (above the protocol demux. only gives you packets that would 
otherwise have been
discarded due to not being a known protocol.)

man 4 ng_ether


>##### end kernel options
>
># uname -a
>FreeBSD ntp-2.labs.iptv 6.0-RELEASE FreeBSD 6.0-RELEASE #0: Thu May 25 14:34:57 CDT 2006
>
>root@ntp-2# sysctl -a|grep graph 
>netgraph_path     0     0K       -       30  16
>netgraph_sock     0     0K       -        5  64
>netgraph_msg     0     0K       -       30  64,128,256,1024
>netgraph_node     0     0K       -        5  256
>net.graph.maxalloc: 512
>net.graph.abi_version: 11
>net.graph.msg_version: 8
>net.graph.control.proto: 2
>net.graph.data.proto: 1
>net.graph.family: 32
>net.graph.recvspace: 20480
>net.graph.maxdgram: 20480
>
># ifconfig
>fxp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
>	options=8<VLAN_MTU>
>	inet6 fe80::2b0:d0ff:fee1:1754%fxp0 prefixlen 64 scopeid 0x1 
>	inet 192.168.10.1 netmask 0xffffff00 broadcast 192.168.10.255
>	ether 00:b0:d0:e1:17:54
>	media: Ethernet autoselect (100baseTX)
>	status: active
>fxp1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
>	options=8<VLAN_MTU>
>	inet6 fe80::2b0:d0ff:fee1:1755%fxp1 prefixlen 64 scopeid 0x2 
>	inet 10.3.40.250 netmask 0xffffff00 broadcast 10.3.40.255
>	ether 00:b0:d0:e1:17:55
>	media: Ethernet autoselect (100baseTX <full-duplex>)
>	status: active
>sis0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
>	options=8<VLAN_MTU>
>	inet6 fe80::20f:b5ff:fe46:8e17%sis0 prefixlen 64 scopeid 0x3 
>	inet 144.60.43.147 netmask 0xffffff00 broadcast 144.60.43.255
>	ether 00:0f:b5:46:8e:17
>	media: Ethernet autoselect (100baseTX <full-duplex>)
>	status: active
>sis1: flags=8842<BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
>	options=8<VLAN_MTU>
>	ether 00:0f:b5:46:59:63
>	media: Ethernet autoselect (100baseTX <full-duplex>)
>	status: active
>lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
>	inet6 ::1 prefixlen 128 
>	inet6 fe80::1%lo0 prefixlen 64 scopeid 0x5 
>	inet 127.0.0.1 netmask 0xff000000 
>netgraph_24may2006.txt
>netgraph_26may2006.txt
>  
>



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