<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
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--></style></head><body lang=EN-US link=blue vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Great article. Who is the author?</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Sent from <a href="https://go.microsoft.com/fwlink/?LinkId=550986">Mail</a> for Windows 10</p><p class=MsoNormal><o:p> </o:p></p><div style='mso-element:para-border-div;border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal style='border:none;padding:0in'><b>From: </b><a href="mailto:openssl-users@dukhovni.org">Viktor Dukhovni</a><br><b>Sent: </b>Thursday, April 27, 2017 11:54 AM<br><b>To: </b><a href="mailto:openssl-users@openssl.org">openssl-users@openssl.org</a><br><b>Subject: </b>Re: [openssl-users] Query regarding MSG_NOSIGNAL with SSL_Write</p></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>On Thu, Apr 27, 2017 at 12:32:42PM +0000, Salz, Rich via openssl-users wrote:</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>> > Does openssl provide any way to set MSG_NOSIGNAL on sendmsg (Underlying TCP/IP socket layer) ?</p><p class=MsoNormal>> </p><p class=MsoNormal>> No. You will have to modify the code yourself.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Actually, it is possible to do the I/O in application code, using</p><p class=MsoNormal>any "write some data down a socket" API of the application's choice.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal> https://www.openssl.org/docs/man1.0.2/crypto/BIO_s_bio.html</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>In particular, the OP could use sendmsg() to move data between the</p><p class=MsoNormal>SSL layer and the network.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>For a complete example, see network_biopair_interop() function in</p><p class=MsoNormal>Postfix 2.3 (recent Postfix releases no longer use this approach).</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal> https://github.com/vdukhovni/postfix/blob/postfix-2.3/postfix/src/tls/tls_bio_ops.c</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>-- </p><p class=MsoNormal> Viktor.</p><p class=MsoNormal>-- </p><p class=MsoNormal>openssl-users mailing list</p><p class=MsoNormal>To unsubscribe: https://mta.openssl.org/mailman/listinfo/openssl-users</p><p class=MsoNormal><o:p> </o:p></p></div></body></html>