gnutls_dtls_cookie_send - API function
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.
) is the one that the original incoming packet was
This function must be called at the first incoming packet, prior to allocating
any resources and must be succeeded by gnutls_dtls_cookie_verify()
the number of bytes sent, or a negative error code.
Report bugs to <firstname.lastname@example.org>.
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