boost::asio 序列16: tcp::socket 和 udp::socket & socket_basic

reactive_socket_service_base execution_context_service_base <reative_socket_service<Porotocol>>

\ |

reactive_socket_service<Protocol>

socket_basic io_object_impl<Protocol, Executor> (成员变量) system_executor

\ | |

basic_socket<Protocol, Executor> 其中 Exector =====> executor

/ \

basic_stream_socket<tcp> basic_datagram_socket<udp>

socket_basic:定义socket共用的一些数据类型和选项

shutdown_type	shutdown_receive = BOOST_ASIO_OS_DEF(SHUT_RD), shutdown_send = BOOST_ASIO_OS_DEF(SHUT_WR), shutdown_both = BOOST_ASIO_OS_DEF(SHUT_RDWR)
message_flags	BOOST_ASIO_STATIC_CONSTANT(int, message_peek = BOOST_ASIO_OS_DEF(MSG_PEEK)); BOOST_ASIO_STATIC_CONSTANT(int, message_out_of_band = BOOST_ASIO_OS_DEF(MSG_OOB)); BOOST_ASIO_STATIC_CONSTANT(int, message_do_not_route = BOOST_ASIO_OS_DEF(MSG_DONTROUTE)); BOOST_ASIO_STATIC_CONSTANT(int, message_end_of_record = BOOST_ASIO_OS_DEF(MSG_EOR));
wait_type	enum wait_type { /// Wait for a socket to become ready to read. wait_read, /// Wait for a socket to become ready to write. wait_write, /// Wait for a socket to have error conditions pending. wait_error };
SOL_SOCKET/SO_BROADCAST	typedef boost::asio::detail::socket_option::boolean< BOOST_ASIO_OS_DEF(SOL_SOCKET), BOOST_ASIO_OS_DEF(SO_BROADCAST)> broadcast;
SOL_SOCKET/SO_DEBUG	typedef boost::asio::detail::socket_option::boolean< BOOST_ASIO_OS_DEF(SOL_SOCKET), BOOST_ASIO_OS_DEF(SO_DEBUG)> debug;
SOL_SOCKET/SO_DONTROUTE	typedef boost::asio::detail::socket_option::boolean< BOOST_ASIO_OS_DEF(SOL_SOCKET), BOOST_ASIO_OS_DEF(SO_DONTROUTE)> do_not_route;
SOL_SOCKET/SO_KEEPALIVE	typedef boost::asio::detail::socket_option::boolean< BOOST_ASIO_OS_DEF(SOL_SOCKET), BOOST_ASIO_OS_DEF(SO_KEEPALIVE)> keep_alive;
SOL_SOCKET/SO_SNDBUF	typedef boost::asio::detail::socket_option::integer< BOOST_ASIO_OS_DEF(SOL_SOCKET), BOOST_ASIO_OS_DEF(SO_SNDBUF)> send_buffer_size;
SOL_SOCKET/SO_SNDLOWAT	typedef boost::asio::detail::socket_option::integer< BOOST_ASIO_OS_DEF(SOL_SOCKET), BOOST_ASIO_OS_DEF(SO_SNDLOWAT)> send_low_watermark;
SOL_SOCKET/SO_RCVBUF	typedef boost::asio::detail::socket_option::integer< BOOST_ASIO_OS_DEF(SOL_SOCKET), BOOST_ASIO_OS_DEF(SO_RCVBUF)> receive_buffer_size;
SOL_SOCKET/SO_RCVLOWAT	typedef boost::asio::detail::socket_option::integer< BOOST_ASIO_OS_DEF(SOL_SOCKET), BOOST_ASIO_OS_DEF(SO_RCVLOWAT)> receive_low_watermark;
SOL_SOCKET/SO_REUSEADDR	typedef boost::asio::detail::socket_option::boolean< BOOST_ASIO_OS_DEF(SOL_SOCKET), BOOST_ASIO_OS_DEF(SO_REUSEADDR)> reuse_address;
SOL_SOCKET/SO_LINGER	typedef boost::asio::detail::socket_option::linger< BOOST_ASIO_OS_DEF(SOL_SOCKET), BOOST_ASIO_OS_DEF(SO_LINGER)> linger;
SOL_SOCKET/SO_OOBINLINE	typedef boost::asio::detail::socket_option::boolean< BOOST_ASIO_OS_DEF(SOL_SOCKET), BOOST_ASIO_OS_DEF(SO_OOBINLINE)> out_of_band_inline;
Socket option to report aborted connections on accept	typedef boost::asio::detail::socket_option::boolean< boost::asio::detail::custom_socket_option_level, boost::asio::detail::enable_connection_aborted_option> enable_connection_aborted;
the FIONREAD IO control command	typedef boost::asio::detail::io_control::bytes_readable bytes_readable;

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