Establish a connection.

basic_socket_streambuf< Protocol, StreamSocketService > * connect(
    const endpoint_type & endpoint);

template<
    typename T1,
    ... ,
    typename TN>
basic_socket_streambuf< Protocol, StreamSocketService > * connect(
    T1 t1,
    ... ,
    TN tn);

asio::error_code connect(
    const endpoint_type & peer_endpoint,
    asio::error_code & ec);