Sean Boudreau(deleted)
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Re: devn driver causes a route to get added in the system
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Sean Boudreau(deleted)
03/18/2009 10:54 AM
post24697
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Re: devn driver causes a route to get added in the system
On Wed, Mar 18, 2009 at 08:46:27AM -0400, Mihir Daftari wrote:
> > Hi..
> > We have developed a devn driver which can be mounted into io-net. The
> > interface shows up fine (dpd0) and generally things seem to work. But when I
> > do a netstat -rn I see that a route to lo0 has been added.
> >
> > If I assign address 192.168.0.1 to the interface I created.. then the
> > following line appears in the routing table.
> >
> > Destination: Gateway Flags Refs Use MTU
> > Interface
> > 192.168.0.1 192.168.0.1 UH 0 0 - lo0
> >
> >
> > Also, I see my tx_done function (the third function in the
> > io_net_registrant_funcs_t) gets called when I do ifconfig dpd0 192.168.0.1
> >
> > Here is the entire routing table and output of the ifconfig (We also have an
> > ethernet en1 interface running).
> >
> > Destination Gateway Flags Refs Use Mtu
> > Interface
> > default 77.177.39.1 UG 1 9 -
> > en1
> > 127.0.0.1 127.0.0.1 UH 0 0 33212
> > lo0
> > 77.177.39/24 link#3 UC 1 0 -
> > en1
> > 77.177.39.1 00:00:5e:00:01:01 UHLc 1 0 - en1
> >
> > 192.168 192.168.0.1 U 0 0 -
> > dpd0
> > 192.168.0.1 192.168.0.1 UH 0 0 -
> > lo0
> >
> > lo0: flags=8009<UP,LOOPBACK,MULTICAST> mtu 33212
> > capabilities=7<IP4CSUM,TCP4CSUM,UDP4CSUM>
> > enabled=0<>
> > inet 127.0.0.1 netmask 0xff000000
> > dpd0: flags=c43<UP,BROADCAST,RUNNING,OACTIVE,SIMPLEX> mtu 1500
> > inet 192.168.0.1 netmask 0xffffff00 broadcast 192.168.0.255
> > en1: flags=8a43<UP,BROADCAST,RUNNING,ALLMULTI,SIMPLEX,MULTICAST> mtu 1500
> > address: 00:80:c8:3a:96:a2
> > inet 77.177.39.101 netmask 0xffffff00 broadcast 77.177.39.25
> >
>
>
> I guess I never really put what my question was.. I have two..
> 1) Why does it add that route?
Are you sure it's happening on ifconfig. The subnet route
will be created which is this one in your out put above:
192.168 192.168.0.1 U 0 0 - dp0
Is the lo0 one being made on first access? eg when you
ping yourself?
> 2) Why does my tx_done function (the third function in the
> > io_net_registrant_funcs_t) get called when I do ifconfig ?
Someone must be returning a packet you sent up or you're
calling it yourself (sending up a packet that no one took).
-seanb
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