=pod =head1 NAME SSL_CTX_set_min_proto_version, SSL_CTX_set_max_proto_version, SSL_set_min_proto_version, SSL_set_max_proto_version - Set minimum and maximum supported protocol version =head1 SYNOPSIS #include int SSL_CTX_set_min_proto_version(SSL_CTX *ctx, int version); int SSL_CTX_set_max_proto_version(SSL_CTX *ctx, int version); int SSL_set_min_proto_version(SSL *ssl, int version); int SSL_set_max_proto_version(SSL *ssl, int version); =head1 DESCRIPTION The functions set the minimum and maximum supported protocol versions for the B or B. This works in combination with the options set via L that also make it possible to disable specific protocol versions. Use these functions instead of disabling specific protocol versions. Setting the minimum or maximum version to 0, will enable protocol versions down to the lowest version, or up to the highest version supported by the library, respectively. Currently supported versions are B, B, B, B, B for TLS and B, B for DTLS. =head1 RETURN VALUES These functions return 1 on success and 0 on failure. =head1 NOTES All these functions are implemented using macros. =head1 HISTORY The functions were added in OpenSSL 1.1.0 =head1 SEE ALSO L, L =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