There are ALPN/NPN callbacks that need to be set. Documentation was added 
recently to 1.0.2:

https://www.openssl.org/docs/man1.0.2/ssl/SSL_CTX_set_alpn_select_cb.html

--
-Todd Short
// tsh...@akamai.com<mailto:tsh...@akamai.com>
// "One if by land, two if by sea, three if by the Internet."

On Apr 20, 2016, at 5:53 AM, james sqawz 
<james.sq...@gmail.com<mailto:james.sq...@gmail.com>> wrote:

Hi all,

I want to add two extension field in CLIENT HELLO request.

Extension: next protocol  negotiation
Extension:application layer protocol negotiation

For that purpose which API/function of openssl I will call?

Thanks
Pranab


On Mon, Apr 18, 2016 at 6:16 PM, james sqawz 
<james.sq...@gmail.com<mailto:james.sq...@gmail.com>> wrote:
Hi all,

Thanks for the providing the forum for discussion on TLS/OPENSSL related issue.

I am very new to openssl.

Currently I am trying to implement HTTP over TLS.(TLS Version 1.2)
For that purpose I send connect request to the server,but connection is getting 
failed.

Following fields are abscent in my ssl packet.

Extension: server name present
Extension:application layer protocol negotiation

Apart from that I did not set path of Server Certificate.

Shall these impact my connect request.
Can somebody help.

Thanks
James

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