=pod =head1 NAME DTLS_get_data_mtu - Get maximum data payload size =head1 SYNOPSIS #include size_t DTLS_get_data_mtu(const SSL *ssl); =head1 DESCRIPTION This function obtains the maximum data payload size for the established DTLS connection B, based on the DTLS record MTU and the overhead of the DTLS record header, encryption and authentication currently in use. =head1 RETURN VALUES Returns the maximum data payload size on success, or 0 on failure. =head1 HISTORY This function was added in OpenSSL 1.1.1 =head1 COPYRIGHT Copyright 2016 The OpenSSL Project Authors. All Rights Reserved. Licensed under the OpenSSL license (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at L. =cut