now store a string (of max NICKLEN size) as service stamp. See
protoctl.txt and serverprotocol.html in doc/technical for more
information.
Patch from nenotopia (#3966).
- Server protocol: added PROTOCTL EATH=servername, which allows us to
authenticate the server very early in the handshake process. That way,
certain commands and PROTOCTL tokens can 'trust' the server.
See doc/technical/protoctl.txt for details.
- Server protocol: between new Unreal servers we now do the handshake a
little bit different, so it waits with sending the SERVER command until
the first PROTOCTL is received. Needed for next.
- Server protocol: added PROTOCTL SERVERS=1,2,3,4,etc by which a server can
inform the other server which servers (server numeric, actually) it has
linked. See doc/technical/protoctl.txt and next for details.
- When our server was trying to link to some server, and at the same time
another server was also trying to link with us, this would lead to a
server collision: the server would link (twice) ok at first, but then a
second later or so both would quit with 'Server Exists' with quite some
mess as a result. This isn't unique to Unreal, btw.
This happened more often when you had a low connfreq in your link blocks
(aka: quick reconnects), or had multiple hubs on autoconnect (with same
connfreq), or when you (re)started all servers at the same time.
This should now be solved by a new server handshake design, which detects
this race condition and solves it by closing one of the two (or more)
connections to avoid the issue.
This also means that it should now be safe to have multiple hubs with low
connfreq's (eg: 10s) without risking that your network falls apart.
This new server handshake (protocol updates, etc) was actually quite some
work, especially for something that only happened sporadically. I felt it
was needed though, because (re)linking stability is extremely important.
This new feature/design/fix requires extensive testing.
This feature can be disabled by: set { new-linking-protocol 0; };
- Updated unrealinst.iss: made it easier for me to have 2 curl versions, this is so we can
ship the SSL version of unreal with a curl that supports SSL (https, etc).
- Preperations for pre-1 (version change, etc)
If 2 servers try to link and the allowed nick characters do not fully match, then
the link will be rejected. Note that this will not prevent you from 3.2.2<->3.2.3/CVS
charsets mistakes, but only with linking CVS/3.2.3+ servers. Suggested by Troco (#0002360)
This might need some additional testing, but initial results are positive :).
William Pitcock