centos man page for gnutls_dtls_cookie_send

gnutls_dtls_cookie_send(3)					      gnutls						gnutls_dtls_cookie_send(3)

NAME
       gnutls_dtls_cookie_send - API function

SYNOPSIS
       #include <gnutls/dtls.h>

       int   gnutls_dtls_cookie_send(gnutls_datum_t*   key,   void*   client_data,  size_t  client_data_size,  gnutls_dtls_prestate_st*  prestate,
       gnutls_transport_ptr_t ptr, gnutls_push_func push_func);

ARGUMENTS
       gnutls_datum_t* key
		   is a random key to be used at cookie generation

       void* client_data
		   contains data identifying the client (i.e. address)

       size_t client_data_size
		   The size of client's data

       gnutls_dtls_prestate_st* prestate
		   The previous cookie returned by gnutls_dtls_cookie_verify()

       gnutls_transport_ptr_t ptr
		   A transport pointer to be used by  push_func

       gnutls_push_func push_func
		   A function that will be used to reply

DESCRIPTION
       This function can be used to prevent denial of service attacks to a DTLS server by requiring the client to reply using  a  cookie  sent	by
       this  function.	That  way  it can be ensured that a client we allocated resources for (i.e. gnutls_session_t) is the one that the original
       incoming packet was originated from.

RETURNS
       the number of bytes sent, or a negative error code.

SINCE
       3.0

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

COPYRIGHT
       Copyright (C) 2012 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 info and gnutls programs are properly installed at your site,
       the command

	      info gnutls

       should give you access to the complete manual.  As an alternative you may obtain the manual from:

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

gnutls								      3.1.15						gnutls_dtls_cookie_send(3)