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=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 <openssl/ssl.h>

 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 portocol versions for the B<ctx> or B<ssl>.
This works in combination with the options set via SSL_CTX_set_options() that allows to disable specific protocol versions.
You should use these functions instead of disabling a specific protocol version.

When setting the minimum or maximum version to 0 it will use the lowest or highest supported version, respectively, by the library.

Currently supported versions are B<SSL3_VERSION>, B<TLS1_VERSION>, B<TLS1_1_VERSION>, B<TLS1_2_VERSION>, B<DTLS1_VERSION> and B<DTLS1_2_VERSION>.

=head1 RETURN VALUES

The function returns 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<SSL_CTX_set_options(3)>, L<SSL_CONF_cmd(3)>

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