Sent the message by reply instead of reply all so wasn't delivered to the list sending it again, sorry ^-^

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I managed to get the reading from the server part of nbdcpy working (queuing new requests after a socket gets free etc.), the writing to destination part is not being executed due to some sneaky bug I hope to find  it soon.

This zero-copy TCP receive API looks promising should I pursue it further

Thanks and regards,

Abhay