WSASend behaviour / gRPC compatibility
Ruud Schramp
ruud at schramp.com
Thu Jan 6 08:40:01 CST 2022
Hello All,
I am trying to run a Python gRPC application in WINE.
It turns out the gRPC Windows binding uses WSASend which first tries the
"blocking" variant on a overlapped socket.
Based on the code, the EXPECTED behaviour is that WSASend is atomic: It
either sends nothing and reports WSAEWOULDBLOCK, or it sends everything
and reports SUCCESS.
The behaviour in WINE is:
It sends upto the TCP Congestion window, and I haven't seen it report
WSAEWOULDBLOCK. (WSASend() returns 0)
Anyone observed this before? How do other programs handle this?
I reported the same issue at the gRPC group
https://groups.google.com/g/grpc-io/c/-RzRZ867jy0
Best regards,
Ruud
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