SSL_CTRL_SET_MAX_PROTO_VERSION
SSL_CTX_ctrl(ctx, SSL_CTRL_SET_MAX_PROTO_VERSION, version, NULL)
SSL_ctrl(s, SSL_CTRL_SET_MAX_PROTO_VERSION, version, NULL)
case SSL_CTRL_SET_MAX_PROTO_VERSION:
case SSL_CTRL_SET_MAX_PROTO_VERSION:
if (!set_protocol_version(server_max_proto, s_ssl, SSL_CTRL_SET_MAX_PROTO_VERSION))
if (!set_protocol_version(client_max_proto, c_ssl, SSL_CTRL_SET_MAX_PROTO_VERSION))