Chuck McManis <[EMAIL PROTECTED]> writes: > Well, its curiouser and curiouser ;-) > > Ok, so I've got my new driver written. Started with the rhine driver > but pretty much replaced everything except the buffer handling code. > > I added some instrumentation to see packets being transmitted as well > as packets being received. I've got tcpdump of course. > > In order to simplify things I configured redboot to NOT use bootp and > instead merely assign the address 192.168.110.177 directly. > > It does, and it comes up to the redboot prompt, but if I try to ping > my server (on the same subnet) it can't see it. Now tcpdump(8) can see > my target board send out an ARP request for the server, and it sees > the response. The printf's in the ethernet driver are showing that the > ethernet chip is seeing those packets as well and fetching them in the > _recv() function. But they never seem to make up into the networking > stack where they belong. > > The weird thing is that with teh FXP driver configured this thing > works entirely as expected so I don't think there are issues with my > repository being out of date or something. > > What information can I provide that might give someone a clue about > what is going on here?
Have you tried pinging your target board from your host. I usually find this is a easier way of testing basic ethernet functionality. You may need to trace the received packets further up into the redboot IP stack. One possibility is that there's a fencepost problem and something like the checksum is failing. Printing out whole packets using diag_dump_buf() in the driver can often show where data is being scrambled -- although this does require a bit of familiarity with ethernet and IP packet formats. It is almost certain to be a problem in the ethernet driver, but you need to find out why the packets are being dropped in the IP stack to find out what is going wrong lower down. -- Nick Garnett eCos Kernel Architect http://www.ecoscentric.com The eCos and RedBoot experts Besuchen Sie uns vom 14.-16.02.06 auf der Embedded World 2006, Stand 11-222 Visit us at Embedded World 2006, Nürnberg, Germany, 14-16 Feb, Stand 11-222 -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
