Write some data to the socket.

template<
    typename ConstBufferSequence>
std::size_t write_some(
    const ConstBufferSequence & buffers);
  » more...

template<
    typename ConstBufferSequence>
std::size_t write_some(
    const ConstBufferSequence & buffers,
    boost::system::error_code & ec);
  » more...