Can somebody tell me what skb_checksum does? How is it different from
computing a TCP checksum and why is it necessary?
What does it return?
In tcp_input.c I see the following lines
if (tcp_checksum_complete_user(sk,, skb))
goto csum_error;
tcp_checksum_complete goes through a series of function calls that finally
result in a call to skb_checksum?
Why does it have to return a 0?
Thanks
S
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