[asio-users] Handle interruptions while performing sync handshake on TLS sockets

[Amirsaman M. <ami...@mo...>]

Hi there,

My understanding from the code is that the public-facing API
<https://github.com/chriskohlhoff/asio/blob/62481a25be6cf78cbe714419a4462fd89bd84ab9/asio/include/asio/ssl/stream.hpp#L406-L421>
does not allow continuing interrupted handshakes, since the API doesn't
inform the caller about the number of transferred bytes during the latest
interrupted attempt.

The implementation for `detail::handshake_op` supports retrying and
advancing buffers, but it doesn't handle interrupted syscalls and delegates
those to the caller. However, the caller cannot simply retry the handshake
as consumed bytes off the wire are no longer available.

Am I missing something or the caller is expected to drop the connection?

-- 

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