[openssl-users] Graceful shutdown of TLS connection for blocking sockets

[Thomas J. Hruska]

On 10/9/2017 7:29 AM, Jakob Bohm wrote:
> I suggest you find a good authoritative source for your claim
> that select() should not be used with blocking sockets.

http://man7.org/linux/man-pages/man2/select.2.html

Section BUGS:

"Under Linux, select() may report a socket file descriptor as "ready for 
reading", while nevertheless a subsequent read blocks.  This could for 
example happen when data has arrived but upon examination has wrong 
checksum and is discarded.  There may be other circumstances in which a 
file descriptor is spuriously reported as ready.  Thus it may be safer 
to use O_NONBLOCK on sockets that should not block."


Authoritative enough for you?

-- 
Thomas Hruska
Shining Light Productions

Home of BMP2AVI and Win32 OpenSSL.
http://www.slproweb.com/