On Mon, 2009-06-22 at 12:32 +0100, David Ward wrote: > Hi > I wonder if anyone can help with a lwip problem on a Xilinx ML506 > Virtex 5 evaluation board with a microblaze processor and Xilinx Lwip > 2.0
Any idea what version of lwIP that corresponds to? We're still on 1.3.0 as the most recent release. > We are using the raw packet implemetation with a single TCPIP socket > link between a windows PC and the development board. I have based my > code on the Xilinx web server examples. > > Our link connects and runs for a while, then fails. > Investigating with wireshark shows that on occasion lwip fails to ack > a packet or two causing the PC to perform a fast re-transmission, lwip > transmits an ack and the link re covers, except that our window size > has reduced by the size of the re-transmitted packet. It is this > 'window buffer leak' that causes the link to fail eventually. > > Is there anything I am missing, or that I need to do to clear out > duplicate packets? You could try disabling TCP_QUEUE_OOSEQ and see if your problem goes away. If it does, that suggests packets aren't being from from the out- of-order segment list. Kieran _______________________________________________ lwip-users mailing list lwip-users@nongnu.org http://lists.nongnu.org/mailman/listinfo/lwip-users
