Bug#283107: telnet-connections to some hosts fail

[Thiemo Seufer <ths@networkno.de>]

Jurij Smakov wrote:
[snip]
> >The thing is, that not all telnet-connections fail:
> >
> >- telnet to Linux-Host (try 'telnet mailgw1 25'): works
> >- telnet to Solaris-Host (try 'telnet esslingen'): works
> >- telnet to Ascend MAX4000 Access-Server (m-nas1): fails
> >- telnet to Cisco 7200 VXR (try 'telnet ol-gw'): fails
> 
> Right, I was able to figure out that these bad checksum messages are 
> completely bogus (they are also produced by a tcpdump when I run it on my 
> Ultra5 and telnet to it). So that's not really it :-(. At the moment I am 
> out of ideas. I'll try to build a pristine kernel tomorrow and make a 
> comparison between tcpdump output in these two cases.

This suggests the checksum inline assembly in arch/sparc64/lib
is somewhat broken, but it seem to be in line with upstream 2.4.

It is much more complicated than the 2.6 code, though.


Thiemo