问安全SSL连接错误:未知协议|错误的主机名查找

EN

bio = BIO_new_connect("www.tools.ietf.org:80");
if(bio == NULL)
{
    /* Handle the failure */
}

if(BIO_do_connect(bio) <= 0)
{
    /* Handle failed connection */
}

BIO                 * m_bio;
SSL_CTX             * m_ctx;
SSL                 * m_ssl;

SSL_library_init(); 

m_ctx = SSL_CTX_new(SSLv23_client_method());

SSL_load_error_strings();
ERR_load_BIO_strings();
OpenSSL_add_all_algorithms();

SSL_CTX_set_default_verify_paths(m_ctx);

m_bio = BIO_new_ssl_connect(m_ctx);
BIO_get_ssl(m_bio, &m_ssl);
SSL_set_mode(m_ssl, SSL_MODE_AUTO_RETRY);

BIO_set_conn_hostname(m_bio, "www.tools.ietf.org:80");


if (BIO_do_connect(m_bio) <= 0)
{
    printf("Error: %s\n", ERR_reason_error_string(ERR_get_error()));
    throw std::runtime_error("FEEDREADER: Connection failed.");
}

if(SSL_get_verify_result(m_ssl) != X509_V_OK)
{
    throw std::runtime_error("FEEDREADER: Verification failed.");
}