[Freeciv-Dev] Re: Potential Diplomacy Cheating (was: Freeciv Networking/Mac Server patches)

[Jed Davis <jldavis@xxxxxxxxxxxxxx>]

--On Sunday, 20 August 2000 2:57 PM -0600 Andy Black 
<ablack@xxxxxxxxxxxxxx> wrote:
> At 2:24 PM +1000 8/12/2000, David Pfitzner wrote:
> > Incidently I would have thought a two-stage acceptance would be
> > safer: what if someone adds a clause just _before_ the server
> > receives your 'accept' packet (and then they quickly accept
> > themselves).
> What about spliting the accept packet into an accept (set accept flag)
> packet and a decline (clear accept flag) packet?  The client should always
> send a decline packet after recieving new clauses.
Or, the server could clear its acceptance flag for all (both?) players 
whenever a change is made, then notify the clients of the change.  If the 
client has to receive the new clause and then send a decline, it seems to 
me that there'd be a race condition for the other player to "accept" the 
modified treaty without the new clause's being approved by the other player.
--Jed