[issue37535] Client SSLSocket with select.select() always returns readable with OpenSSL 1.1.1

[Christian Heimes]

Christian Heimes <lists at cheimes.de> added the comment:

do_handshake() performs just the handshake. TLS protocol can send or receive additional protocol data after the handshake, e.g. alerts, rekeying or renegotiation. The example just happened to not trigger these in TLS 1.2. TLS makes non-blocking IO more complicated.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37535>
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