gnutls_handshake_set_post_client_hello_function man page on DragonFly

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gnutls_handshake_set_post_clgnutls_handshake_set_post_client_hello_function(3)

NAME
       gnutls_handshake_set_post_client_hello_function - API function

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.

       Since  GnuTLS 3.3.5 the callback is allowed to return GNUTLS_E_AGAIN or
       GNUTLS_E_INTERRUPTED to	put  the  handshake  on	 hold.	In  that  case
       gnutls_handshake()  will return GNUTLS_E_INTERRUPTED and can be resumed
       when needed.

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 <bugs@gnutls.org>.
       Home page: http://www.gnutls.org

COPYRIGHT
       Copyright © 2001-2014 Free Software Foundation, Inc..
       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 /usr/share/doc/gnutls/ directory does not contain the HTML  form
       visit

       http://www.gnutls.org/manual/

gnutls			    gnutls_handshake_set_post_client_hello_function(3)
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