It looks like it timed out properly, correct?
Exactly. So the non-SSL code path is not affected, but SSL gets stuck. The manpage for SSL_read says:
"If the underlying BIO is blocking, SSL_read() will only return, once
the read operation has been finished or an error occurred, except
when
a renegotiation take place, in which case a SSL_ERROR_WANT_READ may
occur. This behaviour can be controlled with the SSL_MODE_AUTO_RETRY
flag of the SSL_CTX_set_mode(3) call.
If the underlying BIO is non-blocking, SSL_read() will also return
when
the underlying BIO could not satisfy the needs of SSL_read() to con-
tinue the operation. In this case a call to SSL_get_error(3) with the
return value of SSL_read() will yield SSL_ERROR_WANT_READ or
SSL_ERROR_WANT_WRITE. As at any time a re-negotiation is possible, a
call to SSL_read() can also cause write operations! The calling
process
then must repeat the call after taking appropriate action to satisfy
the needs of SSL_read(). The action depends on the underlying BIO.
When
using a non-blocking socket, nothing is to be done, but select() can
be
used to check for the required condition. When using a buffering BIO,
like a BIO pair, data must be written into or retrieved out of the
BIO
before being able to continue."
I haven't yet found what BIO stands for According to Wikipedia it's "an
abstraction library used by OpenSSL to handle communication of various
kinds, including files and sockets, both secure and not".
I'm not sure what to make of that. I would assume that we've got a blocking BIO, because it is - d'oh - blocking. But I don't see how you influence what kind of BIO you use.
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