[dcc2] Final connection negotiation changes (WAS: Is DCC2 Dead?)

[myndzi]

Why not just have a version token, and set the defaults per version.
Whenever IPv6 does come around, inc the version a little and define
new defaults. You could perhaps specify a reply for 'max version
supported' as an error, in which case the sending client can roll back
to an earlier version. In any case, a version token is probably
useful, so that in the future any changes won't have to be by way of
defining an entirely new CTCP message etc., as DCC2 has done vs
DCC1...


On Tue, 4 Jan 2005 14:43:55 -0500, codemastr <codemstr at ptd.net> wrote:
> > I think we are pretty much near the end of the drafting for the connection
> > negotiation.  I am just waiting to hear back about the final notes i sent
> > out.
> >
> > http://six.pairlist.net/pipermail/dcc2/2004-September/000274.html
> 
> Ok then...
> 
> > Are we in agreement on adding a message id in addition to the session id?
> I think so, it seems this is necessary.
> 
> > should the IRCFile and IRCChat application tokens be placed in the
> > connection negotiation draft or in a new supplemental
> I think it is best of all the tokens are described in a draft separate from
> the connection negotiation.
> 
> > Third, some tokens used in the connection process will usually have the
> > same value.  Can we give some tokens default values and assign the default
> > unless otherwise specified?
> I think this would be fine. Yeah, default values can hurt readability, but
> we do have the 512 limit to take into account. My question is though, which
> tokens are you referring to? The only one I can think of is Network=.
> However, making this a default value is tricky. Today, Network=IPv4 is going
> to be 99% of all DCC2 connections. However, 5 years from now, it will most
> likely be Network=IPv6. Meaning, if we default to v4 now, we're only saving
> bandwidth until v6 catches on, and if we default to v6, we're not saving
> bandwidth until v6 catches on, it's a Catch 22. So I guess it is useful to
> know which tokens you are considering to give a default value before we
> decide.
> 
> -- codemastr
> 
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