Hi, I'm currently toying with gnugk's proxy features to connect NetMeeting clients between our LAN and the Internet. It's working great for the most part, but I get reproducable failures in my test scenario with T.120 proxying. The test scenario looks like this: Client 1 --- 100Mb LAN --- Gatekeeper --- 33.6k Dialup --- Client2 When sharing applications from the slow connection to the fast connection, everything works fine. The other way around, however, seems to trash the T.120 connection - the window closes on the NetMeeting client, and all application sharing features in NetMeeting are disabled for the duration of the call. The Gatekeeper, running in -ttt, spits out the following entries: | 2003/12/12 16:24:22.031 3 ProxyChannel.cxx(405) Q931d Received: Connect CRV=14300 from 192.168.0.102:1720 | 2003/12/12 16:24:22.037 3 ProxyChannel.cxx(1574) H245 Set h245Address to 80.120.254.13:48123 | 2003/12/12 16:24:22.546 3 ProxyChannel.cxx(1525) H245 Connected from 193.171.119.211:2550 | 2003/12/12 16:24:22.577 3 ProxyChannel.cxx(1545) H245(2716) Connect to 192.168.0.102:4055 successful | 2003/12/12 16:24:24.169 2 thread.cxx(28) T120Listener 2716 started | 2003/12/12 16:24:24.619 3 ProxyChannel.cxx(1816) T120 Connect to 192.168.0.102:1503 successful | 2003/12/12 16:24:25.212 3 ProxyThread.cxx(193) T120 192.168.0.102:1503 Error(0): (0) | 2003/12/12 16:24:25.472 3 ProxyThread.cxx(193) T120 193.171.119.211:2553 Error(0): (0) | 2003/12/12 16:24:25.752 3 ProxyChannel.cxx(1816) T120 Connect to 192.168.0.102:1503 successful | 2003/12/12 16:24:26.775 3 ProxyChannel.cxx(1816) T120 Connect to 192.168.0.102:1503 successful | 2003/12/12 16:24:26.803 3 ProxyChannel.cxx(1816) T120 Connect to 192.168.0.102:1503 successful At this point, both clients are up & running, and audio is working. When I subsequently select which windows to share in NetMeeting, nothing is logged. Since the Windows (my test application is Mozilla Firebird showing a fairly complex web page, but anything with a fairly complicated drawing process seems to trigger the behaviour). Now, the window is usually hidden behing my GnuGK console, and nothing is logged when the placeholder window appears on the other machine. When I bring the application window to the front, it is drawn halfways on the client before the mentioned problems occur. This is what the gatekeeper logs just before the crash: | 2003/12/12 16:24:58.073 3 ProxyThread.cxx(672) Proxy 192.168.0.102:1503 forward blocked | 2003/12/12 16:24:58.184 3 ProxyThread.cxx(672) Proxy 192.168.0.102:1503 forward blocked | 2003/12/12 16:24:58.295 3 ProxyThread.cxx(672) Proxy 192.168.0.102:1503 forward blocked | 2003/12/12 16:24:58.406 3 ProxyThread.cxx(672) Proxy 192.168.0.102:1503 forward blocked | 2003/12/12 16:24:58.517 3 ProxyThread.cxx(672) Proxy 192.168.0.102:1503 forward blocked | 2003/12/12 16:25:00.563 3 ProxyThread.cxx(193) T120 193.171.119.211:2556 Error(0): Input/output error (12) | 2003/12/12 16:25:00.567 3 ProxyThread.cxx(193) T120 192.168.0.102:1503 Error(0): (0) | 2003/12/12 16:25:00.568 3 ProxyThread.cxx(193) T120 192.168.0.102:1503 Error(0): (0) | 2003/12/12 16:25:00.570 3 ProxyThread.cxx(193) T120 192.168.0.102:1503 Error(0): (0) | 2003/12/12 16:25:00.584 3 ProxyThread.cxx(193) T120 193.171.119.211:2554 Error(0): (0) | 2003/12/12 16:25:00.596 3 ProxyThread.cxx(193) T120 193.171.119.211:2555 Error(0): (0) Since it only seems to happen when the receiving machine has too little bandwidth to cope with the sent data, I guess it is a case of stuffing too much data down a socket buffer or something? Is this a known problem, are there workarounds? ciao, -- Thomas Themel | CenterPoint Connective Software Engineering GmbH Hauptplatz 8/4 | System Administrator / Software Developer 9500 Villach | <http://www.cpointc.com/> +43 676 846623-13| work thomas.themel@cpointc.com play thomas@themel.com ------------------------------------------------------- This SF.net email is sponsored by: SF.net Giveback Program. Does SourceForge.net help you be more productive? Does it help you create better code? SHARE THE LOVE, and help us help YOU! Click Here: http://sourceforge.net/donate/ _______________________________________________ List: Openh323gk-users@lists.sourceforge.net Archive: http://sourceforge.net/mailarchive/forum.php?forum_id=8549 Homepage: http://www.gnugk.org/
