Re: TCPv4 bad checksum in 2.1.131-ac8/9/10

Hwa Jin Bae (hjb@pso.com)
Wed, 16 Dec 1998 11:46:38 -0800


About this TCPv4 bad checksum messages...

I have seen this problem in my port of Linux 2.1.126 to StrongARM
based custom board with 21143 ethernet chip. I tracked it
down to eth_copy_and_sum routine utilized by the tulip.c driver.
When I replaced it with memcpy the problem went away.
You won't see this problem if you enable CONFIG_IP_ROUTER
because that turns off eth_copy_and_sum and uses memcpy.

-- 
Hwa Jin Bae
PSO Systems Inc
mailto:hjb@pso.com
http://www.pso.com

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