[dcc2] UDP Nat2Nat Traversal

[Trent Lloyd]

Hi,

> I think you're referring to actually transferring files using UDP?
Yes :)

> If
> so, I think it might be a lot more hassle than it's worth.
Well, possibly, I thought I'd suggest the idea as its usefull..

> In addition
> to handling ACKs, you also need to handle packet ordering;
> just
> because one UDP packet is sent before another doesn't mean the packets
> are going to arrive on the other end in that order.

*nod*

> Basically we would
> have to re-invent TCP (transmission control...), but luckily that has
> already been taken care of :).
yes, however this requires that one of the machines have a public IP
address, and this is often not the case.

I am also aware of the complexities of transfers over UDP, however in
some cases its usefull, although, I guess, for general IRC clients it
might be more of just a hassle over the potential gain.

Cheers,
Trent
Bur.st

> -----Original Message-----
> From: dcc2-bounces at dcc2.org [mailto:dcc2-bounces at dcc2.org] On Behalf
> Of Trent Lloyd
> Sent: Monday, April 26, 2004 5:23 AM
> To: dcc2 at dcc2.org
> Subject: [dcc2] UDP Nat2Nat Traversal
> 
> Hi Guys,
> 
> I wonder if you should consider a UDP implementation in DCC2 that will
> allow people behind NAT/Firewall/Routers to still connect to each
> other.
> 
> It will need a little more love than a TCP connection obviously
> (because you need to handle the ACKs etc) but I don't see why you
> can't do something similar to TFTP.
> 
> With many people having DSL/Cable routers these days, unconfigured
> port forwarding is often a problem, as well as those behind NAT at
> home, work, school, etc.
> 
> Just wondering if it had been covered, and if it's worth my wild
> writing it up in detail....
> 
> Cheers,
> Trent
> Bur.st
> 
> --
> Trent Lloyd <lathiat at bur.st>
> Bur.st Networking Inc.
> 
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