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Revision a889e9796b6617f98332a0cfe5473c5f63b32cfc authored by Roelof duToit on 13 July 2017, 17:07:26 UTC, committed by Matt Caswell on 14 July 2017, 10:19:17 UTC
Retry SSL_read on ERROR_WANT_READ.
This resolves the retry issue in general, but also the specific case where a TLS 1.3 server sends a post-handshake NewSessionTicket message prior to appdata.

Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Bernd Edlinger <bernd.edlinger@hotmail.de>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3925)
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NOTES.UNIX

 NOTES FOR UNIX LIKE PLATFORMS
 =============================

 For Unix/POSIX runtime systems on Windows, please see NOTES.WIN.


 Shared libraries and installation in non-standard locations
 -----------------------------------------------------------

 Binaries on Unix variants expect to find shared libraries in standard
 locations, such as /usr/lib, /usr/local/lib and some other locations
 configured in the system (for example /etc/ld.so.conf on some systems).
 If the libraries are installed in non-standard locations, binaries
 will not find them and therefore fail to run unless they get a bit of
 help from a defined RPATH or RUNPATH.  This can be applied by adding
 the appropriate linker flags to the configuration command, such as
 this (/usr/local/ssl was the default location for OpenSSL installation
 in versions before 1.1.0):

    $ ./config --prefix=/usr/local/ssl --openssldir=/usr/local/ssl \
        -Wl,-rpath,/usr/local/ssl/lib

 Because the actual library location may vary further (for example on
 multilib installations), there is a convenience variable in Makefile
 that holds the exact installation directory and that can be used like
 this:

    $ ./config --prefix=/usr/local/ssl --openssldir=/usr/local/ssl \
        -Wl,-rpath,'$(LIBRPATH)'
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