gnutls_handshake_set_post_client_hello_function man page on FreeBSD

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gnutls_handshake_set_post_clgnutls_handshake_set_post_client_hello_function(3)

NAME
       gnutls_handshake_set_post_client_hello_function	-  set	callback to be
       called after the client hello is received

SYNOPSIS
       #include <gnutls/gnutls.h>

       void   gnutls_handshake_set_post_client_hello_function(gnutls_session_t
       session, gnutls_handshake_post_client_hello_func func);

ARGUMENTS
       gnutls_session_t session
		   is a gnutls_session_t structure.

       gnutls_handshake_post_client_hello_func func
		   is the function to be called

DESCRIPTION
       This  function  will set a callback to be called after the client hello
       has been received (callback valid in server side only). This allows the
       server to adjust settings based on received extensions.

       Those  settings	could be ciphersuites, requesting certificate, or any‐
       thing else except for version negotiation  (this	 is  done  before  the
       hello message is parsed).

       This callback must return 0 on success or a gnutls error code to termi‐
       nate the handshake.

WARNING
       You should not use this function to terminate the  handshake  based  on
       client  input  unless you know what you are doing. Before the handshake
       is finished there is no way to know if  there  is  a  man-in-the-middle
       attack being performed.

REPORTING BUGS
       Report	 bugs	 to    <bug-gnutls@gnu.org>.	 GnuTLS	  home	 page:
       http://www.gnu.org/software/gnutls/ General help	 using	GNU  software:
       http://www.gnu.org/gethelp/

COPYRIGHT
       Copyright © 2008 Free Software Foundation.
       Copying	and  distribution  of this file, with or without modification,
       are permitted in any medium  without  royalty  provided	the  copyright
       notice and this notice are preserved.

SEE ALSO
       The  full  documentation	 for gnutls is maintained as a Texinfo manual.
       If the info and gnutls programs are properly installed  at  your	 site,
       the command

	      info gnutls

       should give you access to the complete manual.

gnutls			    gnutls_handshake_set_post_client_hello_function(3)
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