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+@deftypefun {unsigned int} {gnutls_dtls_get_data_mtu} (gnutls_session_t @var{session})
+@var{session}: is a @code{gnutls_session_t} type.
+
+This function will return the actual maximum transfer unit for
+application data. I.e. DTLS headers are subtracted from the
+actual MTU which is set using @code{gnutls_dtls_set_mtu()} .
+
+@strong{Returns:} the maximum allowed transfer unit.
+
+@strong{Since:} 3.0
+@end deftypefun