gnutls_ia_set_server_avp_function man page on FreeBSD

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       gnutls_ia_set_server_avp_function - Used to set a AVP callback

       #include <gnutls/extra.h>

       void   gnutls_ia_set_server_avp_function(gnutls_ia_server_credentials_t
       cred, gnutls_ia_avp_func avp_func);

       gnutls_ia_server_credentials_t cred
		   is a gnutls_ia_server_credentials_t structure.

       gnutls_ia_avp_func avp_func

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

       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

       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_server_avp_ptr().  The AVP  received
       from  the  client  is present in last of lastlen size.  The newly allo‐
       cated output AVP to send to the client should be	 placed	 in  *next  of
       *nextlen size.

       The  AVP	 callback  is called to process incoming AVPs from the client,
       and to get a new AVP to send to the client.  It can  also  be  used  to
       instruct	 the  TLS/IA handshake to do go into the Intermediate or Final
       phases.	It return a negative error code, or a gnutls_ia_apptype_t mes‐
       sage type.

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

       Specifically, return GNUTLS_IA_APPLICATION_PAYLOAD (0) to send  another
       AVP  to the client, return GNUTLS_IA_INTERMEDIATE_PHASE_FINISHED (1) to
       indicate that an IntermediatePhaseFinished message should be sent,  and
       return  GNUTLS_IA_FINAL_PHASE_FINISHED  (2)  to indicate that an Final‐
       PhaseFinished message should be sent.  In the last two cases, the  con‐
       tents of the next and nextlen parameter is not used.

       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.

       Report	 bugs	 to    <>.	 GnuTLS	  home	 page: General help	 using	GNU  software:

       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.

       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_server_avp_function(3)

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