[lwip-users]lwip and DHCP

[Bob Brusa]

Hi
Further to my problem report "problem with recent port of lwip" I have  
found the that most probably there is something wrong with the checksum  
calculation of the incoming DHCPoffer. From the debug-output I see that  
lwip combines several fragments and then comes up with a checksum error.  
It drops the packet and DHCP remains without success.

I attach the "erroneous" packet as seen by wireshark (txt-mode)  
090923_xx_1.out and an excerpt of the debug output of the lwip-stack  
090922_3.txt. As the name might make you think - the packages are not of  
the same session. But the picture does not change.
Can somebody guide me how to fix this problem? Just a few words where this  
calculation in the code is done. Thanks and best regards.
  Robert

090923_xx_1.out
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090922_3.txt
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