Hi Wolfram, > I am looking for someone with whom I can discuss some detail questions about > FGs MP protocol.
I'm probably as good a person as anyone, though it's been a long time since I looked at the code. In fact I had to read through it to remind myself of how it works! > I have written an application that communicates with running FG instances. I > can receive all messages, but sometimes my messages seem to be lost. > > My understanding is this: Chat messages are sent inside the position update > packages. At first I have sent them only once, but now I send them at least > 10 times for at least 3 seconds. This code is there to prevent UDP drops. > But it did not help. There are two types of chat message :- - Server messages (message ID 1) which are displayed to the console. - MP Chat strings that are simply a string property (sim/multiplay/chat) and sent as part of the normal position messages when properties have changed. I assume you are interested in the latter? > Is there a hidden bug in my sending logic or do I something completely > wrong? Having not seen your code, I don't know if there's a bug :) A couple of things spring to mind to check: - If you are sending your message through and MP Server, your position data needs to be within 50nm of the receiver, otherwise the MP Server will not forward it. - There's a bug in our XDR implementation that we pad each character to a 4-byte word. See src/Multiplayer/multiplayermgr.cxx line 316, 728, 739. (I think I introduced the bug when I wrote the original string XDR parsing). I'd recommend comparing your XDR encoding to check that it matches. - The string property needs to have a suitable XDR identifier (10002) to map it to the correct property. I hope that helps. Happy Christmas everyone! -Stuart ------------------------------------------------------------------------------ LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial Remotely access PCs and mobile devices and provide instant support Improve your efficiency, and focus on delivering more value-add services Discover what IT Professionals Know. Rescue delivers http://p.sf.net/sfu/logmein_12329d2d _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
