DTLS_get_data_mtu - Get maximum data payload size

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       Licensed under the Apache License 2.0 (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
       <https://www.openssl.org/source/license.html>.

3.5.0                                              2025-06-04                            DTLS_GET_DATA_MTU(3SSL)

       This function obtains the maximum data payload size for the established DTLS connection ssl, based on the
       DTLS record MTU and the overhead of the DTLS record header, encryption and authentication currently in
       use.

       The DTLS_get_data_mtu() function was added in OpenSSL 1.1.1.

       DTLS_get_data_mtu - Get maximum data payload size

       Returns the maximum data payload size on success, or 0 on failure.

        #include <openssl/ssl.h>

        size_t DTLS_get_data_mtu(const SSL *ssl);