[tcpdump-workers] false checksum failure reports

[Rick Jones]

Any thoughts as to how to deal with false checksum failure reports for outbound 
traffic being sniffed on a system with ChecKsum Offload (CKO)?  It seems that 
linux has a flag they can set when capturing the packet that would tell us, not 
sure what other platforms might have - there it might be necessary to "guess" 
based on the source IP matching one of the system's local IPs.

rick jones
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