int SSL_SESSION_set1_ticket_appdata(SSL_SESSION *ss, const void *data, size_t len);
int SSL_SESSION_get0_ticket_appdata(SSL_SESSION *ss, void **data, size_t *len);
-extern const char SSL_version_str[];
-
typedef unsigned int (*DTLS_timer_cb)(SSL *s, unsigned int timer_us);
void DTLS_set_timer_cb(SSL *s, DTLS_timer_cb cb);