Moin all,
I use the raw interface to xmit some lengthy data over TCP. My applications
works fine so far.
I have difficulties to implement retries in case of lost datagrams.
tcp_write sends data without copying it. The data is kept until tcp_sent callback notes success. Thereafter more data is prepared
and xmitted.
What happens if the data gets lost? I expect tcp_sent will not be called as the other side did not acked it. After a while the
tcp_poll callback will be called, which in turn could retransmit the data.
Nevertheless I see tcp_poll callback even when everything works fine.
How can I differentiate whether a retransmit is required or more data should be
send?
Did I miss something in the docs? Any help apreciated.
Friedrich
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