gnutls_ia_set_client_avp_function man page on FreeBSD

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gnutls_ia_set_client_avp_function(3)gnutlsgnutls_ia_set_client_avp_function(3)

NAME
       gnutls_ia_set_client_avp_function - Used to set a AVP callback

SYNOPSIS
       #include <gnutls/extra.h>

       void   gnutls_ia_set_client_avp_function(gnutls_ia_client_credentials_t
       cred, gnutls_ia_avp_func avp_func);

ARGUMENTS
       gnutls_ia_client_credentials_t cred
		   is a gnutls_ia_client_credentials_t structure.

       gnutls_ia_avp_func avp_func
		   is the callback function

DESCRIPTION
       Set the TLS/IA AVP callback handler used for the session.

       The AVP callback is called to process AVPs received  from  the  server,
       and to get a new AVP to send to the server.

       The callback's function form is: int (*avp_func) (gnutls_session_t ses‐
       sion, void *ptr, const char *last, size_t lastlen, char **next,	size_t
       *nextlen);

       The  session  parameter is the gnutls_session_t structure corresponding
       to the current session.	The ptr	 parameter  is	the  application  hook
       pointer,	 set through gnutls_ia_set_client_avp_ptr().  The AVP received
       from the server is present in last of lastlen size, which will be  NULL
       on the first invocation.	 The newly allocated output AVP to send to the
       server should be placed in *next of *nextlen size.

       The callback may invoke	gnutls_ia_permute_inner_secret()  to  mix  any
       generated session keys with the TLS/IA inner secret.

       Return  0  (GNUTLS_IA_APPLICATION_PAYLOAD)  on  success,	 or a negative
       error code to abort the TLS/IA handshake.

       Note that the callback must  use	 allocate  the	next  parameter	 using
       gnutls_malloc(), because it is released via gnutls_free() by the TLS/IA
       handshake function.

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				     2.8.6gnutls_ia_set_client_avp_function(3)
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