gnutls_dtls_cookie_send − API function
#include <gnutls/gnutls.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);
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
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.
the number of bytes sent, or a negative error code.
3.0.0
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
© 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.
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