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12748 Discussions

Linux Strange TCP/IP problem

Altera_Forum
Honored Contributor II
‎07-27-2010 01:25 PM
1,215 Views

Hi all, 

I don't understand this problem...:confused::confused::confused::confused: 

 

I compiled linux for my nios2 custom board (with MMU) and I'm able to run the kernel Image with ramfs... 

The altera tse driver works well (at least, it seems)...I'm able to ping the pc connected via eth0..... 

All the other protocols don't work...i tried telnet tftp ftp...the PC receive packets (sniffed with wireshark) but they seems to be discarded...really strange...there is no firewall..PC can communicate with other PC on the same LAN... 

 

I suppose (but it seems strange to me too) an issue with TCP/IP stack on latest linux distribution ... 

nios2-linux-20100621.tar 

It is really urgent...any help/info will be very appreciated.. 

Thx 

Carlo
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Altera_Forum
Honored Contributor II
‎07-27-2010 03:46 PM
469 Views

:mad::mad: Checksum is WRONG for TCP and UDP sections of any packet coming from my board.....:eek::eek: 

 

It seems impossible...Am I missing some kernel setting??? 

 

If anybody thinks can help in any way...please help...I'm in big trouble... 

 

Carlo
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Altera_Forum
Honored Contributor II
‎07-27-2010 04:00 PM
469 Views

Ok I found the problem....see: 

http://www.alteraforum.com/forum/showthread.php?t=24075 

 

the TCP/UDP checksum is really wrong :eek::eek: 

 

Thnx to jhwu0625 (http://www.alteraforum.com/forum/member.php?u=32244) 

 

Carlo
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