Level 1 protocolIn level 1 protocol there is field "16b Lengte bericht". I assume this is length of whole packet.
But if this data are being send with UDP protocol, this information is avaible from UDP header ( and it's easily accessible ) - so there is no reason to include this value in level 1 packet. With UDP packet size there is also involved something like MTU (maximum transmission unit). This value determines maximum packet size witch can be send thru network without fragmentation. Fragmentation means that packet divided into more IP packets, and receiving computer has to assembly those subpackets to full UDP packet. This implies three things. 1) When fragmentation occurs, there is more thata being send thru network - which is bad. 2) There is additional delay, becouse router needs to divide packet - and it takes time 3) Most important - When one of those subpackets is lost then whole UDP packet is lost (Even thou your computer has received every but one packet). So you received information about 9 planes, but becouse info for 1 plane has been lost - you lost information for all 10 planes. Best solution would be to check MTU for connection (there is no direct way to do it for IPv4 - but mayby there is some hack - i don't know). In IPv6 checking MTU is mandatory - so you must do it - there is also defined minimal supported MTU (but i don't remember value right now). One more thing - compression. Becouse of possibility of packet lost you need to compress each packet independly (size 50-200 bytes). And I have real doubts that classical compression (like gzip, bzip2) will work without increasing packet size. Before you continue to work on creating this protocol, I think you should play Warbirs 2.7x. You can do it for free on Russian server http://home.udmnet.ru/aike/. Play for 2 weeks. After that you will have real understanding of what needs to be done. In short - these should be your minimal goals: 1) 200 players 2) Each player connected with max. 21 kb (modem connection). 3) Ping 600 ms and more - and game is playable 4) Plane warping, after huge packet lost IMHO this protocol you proposed right know, dosn't have any chance to achive those goals. With best regards, Artur Kornacki _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
