Will rfc2734 be supported?

[Kobayashi Katsushi]

Hi,

I have once tried to implement IP over firewire with earlier ID. spec.
in the previous version of driver. The packetization, ARP and broadcast
is not difficult to implement.

However, I cannot believe the MCAP mechanism will not work properly,
since limited No. of acceptable stream channels is supported on
current firewire chipset. I think the current IP over Firewire spec. 
does
not include mechanism to suppress channel allocation in the case of
receiver cannot open more stream channels.


On 2004/02/02, at 14:50, Hidetoshi Shimokawa wrote:

> At Sat, 31 Jan 2004 15:27:03 +0100,
> Dario Freni wrote:
>>
>> [1  <text/plain (quoted-printable)>]
>> Hi guys,
>> I was wondering if the standard implementation of IPoFW is planning to
>> be implemented. I'm not expert on device writing, I was also looking 
>> for
>> some workarounds, like attach the fwe0:lower netgraph hook to a 
>> virtual
>> interface, but reading the rfc I realized that the normal IP packet
>> needs an encapsulation before it's sent on the wire.
>
> I have no plan to implement rfc2734 by myself near future.
> IEEE1394 is somewhat complicated, compared with Ethernet.
> Because there are some types of packets, fwe and IPoFW uses very
> different packet type and formats, so you don't have an easy
> workaround using netgraph.
>
> If you are interested in implementing rfc2734, you need several steps.
>
> - Implement rfc2734 encapsulation as /sys/net/if_ethersubr.c for
> ethernt. rfc2734 uses very different packet format from ethernet.
>
> - Implement generic GASP receive routin in the firewire driver.
> You need this service for multicast/broadcast packet such as an arp
> packet.
>
> - Implement if_fw.c for the interface device.
>
> Though I'm not sure it actually worked, the firewire driver for
> FreeBSD-4.0 seems to have a support for IPoFW
> See ftp://ftp.uec.ac.jp/pub/firewire/ for the patch.
>
>> Bye,
>> Dario
>>
>> -- 
>> Dario Freni (saturnero at gufi.org) - SaturNero on IRCNet, Azzurra
>> Gruppo Utenti FreeBSD Italia (http://www.gufi.org)
>> GPG Public key at http://www.saturnero.net/saturnero.asc
>> [2 Questa parte del messaggio è firmata <application/pgp-signature 
>> (7bit)>]
>>
>
> /\ Hidetoshi Shimokawa
> \/  simokawa at sat.t.u-tokyo.ac.jp
> PGP public key: http://www.sat.t.u-tokyo.ac.jp/~simokawa/pgp.html
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