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526 lines
14 KiB
526 lines
14 KiB
//
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// socket_base.hpp
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// ~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2016 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef ASIO_SOCKET_BASE_HPP
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#define ASIO_SOCKET_BASE_HPP
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#if defined(_MSC_VER) && (_MSC_VER >= 1200)
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# pragma once
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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#include "asio/detail/config.hpp"
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#include "asio/detail/io_control.hpp"
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#include "asio/detail/socket_option.hpp"
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#include "asio/detail/socket_types.hpp"
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#include "asio/detail/push_options.hpp"
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namespace asio {
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/// The socket_base class is used as a base for the basic_stream_socket and
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/// basic_datagram_socket class templates so that we have a common place to
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/// define the shutdown_type and enum.
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class socket_base
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{
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public:
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/// Different ways a socket may be shutdown.
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enum shutdown_type
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{
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#if defined(GENERATING_DOCUMENTATION)
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/// Shutdown the receive side of the socket.
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shutdown_receive = implementation_defined,
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/// Shutdown the send side of the socket.
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shutdown_send = implementation_defined,
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/// Shutdown both send and receive on the socket.
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shutdown_both = implementation_defined
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#else
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shutdown_receive = ASIO_OS_DEF(SHUT_RD),
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shutdown_send = ASIO_OS_DEF(SHUT_WR),
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shutdown_both = ASIO_OS_DEF(SHUT_RDWR)
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#endif
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};
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/// Bitmask type for flags that can be passed to send and receive operations.
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typedef int message_flags;
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#if defined(GENERATING_DOCUMENTATION)
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/// Peek at incoming data without removing it from the input queue.
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static const int message_peek = implementation_defined;
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/// Process out-of-band data.
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static const int message_out_of_band = implementation_defined;
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/// Specify that the data should not be subject to routing.
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static const int message_do_not_route = implementation_defined;
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/// Specifies that the data marks the end of a record.
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static const int message_end_of_record = implementation_defined;
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#else
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ASIO_STATIC_CONSTANT(int,
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message_peek = ASIO_OS_DEF(MSG_PEEK));
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ASIO_STATIC_CONSTANT(int,
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message_out_of_band = ASIO_OS_DEF(MSG_OOB));
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ASIO_STATIC_CONSTANT(int,
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message_do_not_route = ASIO_OS_DEF(MSG_DONTROUTE));
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ASIO_STATIC_CONSTANT(int,
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message_end_of_record = ASIO_OS_DEF(MSG_EOR));
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#endif
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/// Wait types.
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/**
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* For use with basic_socket::wait() and basic_socket::async_wait().
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*/
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enum wait_type
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{
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/// Wait for a socket to become ready to read.
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wait_read,
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/// Wait for a socket to become ready to write.
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wait_write,
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/// Wait for a socket to have error conditions pending.
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wait_error
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};
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/// Socket option to permit sending of broadcast messages.
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/**
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* Implements the SOL_SOCKET/SO_BROADCAST socket option.
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*
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* @par Examples
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* Setting the option:
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* @code
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* asio::ip::udp::socket socket(io_context);
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* ...
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* asio::socket_base::broadcast option(true);
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* socket.set_option(option);
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* @endcode
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*
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* @par
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* Getting the current option value:
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* @code
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* asio::ip::udp::socket socket(io_context);
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* ...
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* asio::socket_base::broadcast option;
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* socket.get_option(option);
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* bool is_set = option.value();
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* @endcode
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*
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* @par Concepts:
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* Socket_Option, Boolean_Socket_Option.
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*/
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#if defined(GENERATING_DOCUMENTATION)
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typedef implementation_defined broadcast;
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#else
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typedef asio::detail::socket_option::boolean<
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ASIO_OS_DEF(SOL_SOCKET), ASIO_OS_DEF(SO_BROADCAST)>
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broadcast;
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#endif
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/// Socket option to enable socket-level debugging.
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/**
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* Implements the SOL_SOCKET/SO_DEBUG socket option.
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*
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* @par Examples
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* Setting the option:
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* @code
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* asio::ip::tcp::socket socket(io_context);
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* ...
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* asio::socket_base::debug option(true);
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* socket.set_option(option);
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* @endcode
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*
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* @par
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* Getting the current option value:
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* @code
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* asio::ip::tcp::socket socket(io_context);
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* ...
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* asio::socket_base::debug option;
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* socket.get_option(option);
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* bool is_set = option.value();
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* @endcode
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*
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* @par Concepts:
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* Socket_Option, Boolean_Socket_Option.
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*/
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#if defined(GENERATING_DOCUMENTATION)
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typedef implementation_defined debug;
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#else
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typedef asio::detail::socket_option::boolean<
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ASIO_OS_DEF(SOL_SOCKET), ASIO_OS_DEF(SO_DEBUG)> debug;
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#endif
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/// Socket option to prevent routing, use local interfaces only.
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/**
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* Implements the SOL_SOCKET/SO_DONTROUTE socket option.
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*
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* @par Examples
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* Setting the option:
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* @code
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* asio::ip::udp::socket socket(io_context);
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* ...
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* asio::socket_base::do_not_route option(true);
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* socket.set_option(option);
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* @endcode
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*
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* @par
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* Getting the current option value:
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* @code
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* asio::ip::udp::socket socket(io_context);
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* ...
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* asio::socket_base::do_not_route option;
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* socket.get_option(option);
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* bool is_set = option.value();
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* @endcode
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*
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* @par Concepts:
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* Socket_Option, Boolean_Socket_Option.
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*/
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#if defined(GENERATING_DOCUMENTATION)
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typedef implementation_defined do_not_route;
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#else
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typedef asio::detail::socket_option::boolean<
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ASIO_OS_DEF(SOL_SOCKET), ASIO_OS_DEF(SO_DONTROUTE)>
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do_not_route;
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#endif
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/// Socket option to send keep-alives.
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/**
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* Implements the SOL_SOCKET/SO_KEEPALIVE socket option.
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*
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* @par Examples
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* Setting the option:
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* @code
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* asio::ip::tcp::socket socket(io_context);
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* ...
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* asio::socket_base::keep_alive option(true);
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* socket.set_option(option);
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* @endcode
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*
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* @par
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* Getting the current option value:
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* @code
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* asio::ip::tcp::socket socket(io_context);
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* ...
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* asio::socket_base::keep_alive option;
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* socket.get_option(option);
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* bool is_set = option.value();
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* @endcode
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*
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* @par Concepts:
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* Socket_Option, Boolean_Socket_Option.
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*/
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#if defined(GENERATING_DOCUMENTATION)
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typedef implementation_defined keep_alive;
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#else
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typedef asio::detail::socket_option::boolean<
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ASIO_OS_DEF(SOL_SOCKET), ASIO_OS_DEF(SO_KEEPALIVE)> keep_alive;
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#endif
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/// Socket option for the send buffer size of a socket.
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/**
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* Implements the SOL_SOCKET/SO_SNDBUF socket option.
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*
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* @par Examples
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* Setting the option:
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* @code
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* asio::ip::tcp::socket socket(io_context);
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* ...
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* asio::socket_base::send_buffer_size option(8192);
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* socket.set_option(option);
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* @endcode
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*
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* @par
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* Getting the current option value:
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* @code
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* asio::ip::tcp::socket socket(io_context);
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* ...
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* asio::socket_base::send_buffer_size option;
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* socket.get_option(option);
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* int size = option.value();
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* @endcode
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*
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* @par Concepts:
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* Socket_Option, Integer_Socket_Option.
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*/
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#if defined(GENERATING_DOCUMENTATION)
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typedef implementation_defined send_buffer_size;
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#else
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typedef asio::detail::socket_option::integer<
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ASIO_OS_DEF(SOL_SOCKET), ASIO_OS_DEF(SO_SNDBUF)>
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send_buffer_size;
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#endif
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/// Socket option for the send low watermark.
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/**
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* Implements the SOL_SOCKET/SO_SNDLOWAT socket option.
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*
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* @par Examples
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* Setting the option:
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* @code
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* asio::ip::tcp::socket socket(io_context);
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* ...
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* asio::socket_base::send_low_watermark option(1024);
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* socket.set_option(option);
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* @endcode
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*
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* @par
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* Getting the current option value:
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* @code
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* asio::ip::tcp::socket socket(io_context);
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* ...
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* asio::socket_base::send_low_watermark option;
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* socket.get_option(option);
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* int size = option.value();
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* @endcode
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*
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* @par Concepts:
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* Socket_Option, Integer_Socket_Option.
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*/
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#if defined(GENERATING_DOCUMENTATION)
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typedef implementation_defined send_low_watermark;
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#else
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typedef asio::detail::socket_option::integer<
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ASIO_OS_DEF(SOL_SOCKET), ASIO_OS_DEF(SO_SNDLOWAT)>
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send_low_watermark;
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#endif
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/// Socket option for the receive buffer size of a socket.
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/**
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* Implements the SOL_SOCKET/SO_RCVBUF socket option.
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*
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* @par Examples
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* Setting the option:
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* @code
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* asio::ip::tcp::socket socket(io_context);
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* ...
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* asio::socket_base::receive_buffer_size option(8192);
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* socket.set_option(option);
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* @endcode
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*
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* @par
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* Getting the current option value:
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* @code
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* asio::ip::tcp::socket socket(io_context);
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* ...
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* asio::socket_base::receive_buffer_size option;
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* socket.get_option(option);
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* int size = option.value();
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* @endcode
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*
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* @par Concepts:
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* Socket_Option, Integer_Socket_Option.
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*/
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#if defined(GENERATING_DOCUMENTATION)
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typedef implementation_defined receive_buffer_size;
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#else
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typedef asio::detail::socket_option::integer<
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ASIO_OS_DEF(SOL_SOCKET), ASIO_OS_DEF(SO_RCVBUF)>
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receive_buffer_size;
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#endif
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/// Socket option for the receive low watermark.
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/**
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* Implements the SOL_SOCKET/SO_RCVLOWAT socket option.
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*
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* @par Examples
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* Setting the option:
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* @code
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* asio::ip::tcp::socket socket(io_context);
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* ...
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* asio::socket_base::receive_low_watermark option(1024);
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* socket.set_option(option);
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* @endcode
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*
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* @par
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* Getting the current option value:
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* @code
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* asio::ip::tcp::socket socket(io_context);
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* ...
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* asio::socket_base::receive_low_watermark option;
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* socket.get_option(option);
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* int size = option.value();
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* @endcode
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*
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* @par Concepts:
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* Socket_Option, Integer_Socket_Option.
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*/
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#if defined(GENERATING_DOCUMENTATION)
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typedef implementation_defined receive_low_watermark;
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#else
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typedef asio::detail::socket_option::integer<
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ASIO_OS_DEF(SOL_SOCKET), ASIO_OS_DEF(SO_RCVLOWAT)>
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receive_low_watermark;
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#endif
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/// Socket option to allow the socket to be bound to an address that is
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/// already in use.
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/**
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* Implements the SOL_SOCKET/SO_REUSEADDR socket option.
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*
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* @par Examples
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* Setting the option:
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* @code
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* asio::ip::tcp::acceptor acceptor(io_context);
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* ...
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* asio::socket_base::reuse_address option(true);
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* acceptor.set_option(option);
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* @endcode
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*
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* @par
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* Getting the current option value:
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* @code
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* asio::ip::tcp::acceptor acceptor(io_context);
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* ...
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* asio::socket_base::reuse_address option;
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* acceptor.get_option(option);
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* bool is_set = option.value();
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* @endcode
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*
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* @par Concepts:
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* Socket_Option, Boolean_Socket_Option.
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*/
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#if defined(GENERATING_DOCUMENTATION)
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typedef implementation_defined reuse_address;
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#else
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typedef asio::detail::socket_option::boolean<
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ASIO_OS_DEF(SOL_SOCKET), ASIO_OS_DEF(SO_REUSEADDR)>
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reuse_address;
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#endif
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/// Socket option to specify whether the socket lingers on close if unsent
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/// data is present.
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/**
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* Implements the SOL_SOCKET/SO_LINGER socket option.
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*
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* @par Examples
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* Setting the option:
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* @code
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* asio::ip::tcp::socket socket(io_context);
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* ...
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* asio::socket_base::linger option(true, 30);
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* socket.set_option(option);
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* @endcode
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*
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* @par
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* Getting the current option value:
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* @code
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* asio::ip::tcp::socket socket(io_context);
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* ...
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* asio::socket_base::linger option;
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* socket.get_option(option);
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* bool is_set = option.enabled();
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* unsigned short timeout = option.timeout();
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* @endcode
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*
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* @par Concepts:
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* Socket_Option, Linger_Socket_Option.
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*/
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#if defined(GENERATING_DOCUMENTATION)
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typedef implementation_defined linger;
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#else
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typedef asio::detail::socket_option::linger<
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ASIO_OS_DEF(SOL_SOCKET), ASIO_OS_DEF(SO_LINGER)>
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linger;
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#endif
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/// Socket option to report aborted connections on accept.
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/**
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* Implements a custom socket option that determines whether or not an accept
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* operation is permitted to fail with asio::error::connection_aborted.
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* By default the option is false.
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*
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* @par Examples
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* Setting the option:
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* @code
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* asio::ip::tcp::acceptor acceptor(io_context);
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* ...
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* asio::socket_base::enable_connection_aborted option(true);
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* acceptor.set_option(option);
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* @endcode
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*
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* @par
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* Getting the current option value:
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* @code
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* asio::ip::tcp::acceptor acceptor(io_context);
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* ...
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* asio::socket_base::enable_connection_aborted option;
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* acceptor.get_option(option);
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* bool is_set = option.value();
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* @endcode
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*
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* @par Concepts:
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* Socket_Option, Boolean_Socket_Option.
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*/
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#if defined(GENERATING_DOCUMENTATION)
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typedef implementation_defined enable_connection_aborted;
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#else
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typedef asio::detail::socket_option::boolean<
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asio::detail::custom_socket_option_level,
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asio::detail::enable_connection_aborted_option>
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enable_connection_aborted;
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#endif
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/// IO control command to get the amount of data that can be read without
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/// blocking.
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/**
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* Implements the FIONREAD IO control command.
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*
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* @par Example
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* @code
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* asio::ip::tcp::socket socket(io_context);
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* ...
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* asio::socket_base::bytes_readable command(true);
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* socket.io_control(command);
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* std::size_t bytes_readable = command.get();
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* @endcode
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*
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* @par Concepts:
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* IO_Control_Command, Size_IO_Control_Command.
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*/
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#if defined(GENERATING_DOCUMENTATION)
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typedef implementation_defined bytes_readable;
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#else
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typedef asio::detail::io_control::bytes_readable bytes_readable;
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#endif
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/// The maximum length of the queue of pending incoming connections.
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#if defined(GENERATING_DOCUMENTATION)
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static const int max_listen_connections = implementation_defined;
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#else
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ASIO_STATIC_CONSTANT(int, max_listen_connections
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= ASIO_OS_DEF(SOMAXCONN));
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#endif
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#if !defined(ASIO_NO_DEPRECATED)
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/// (Deprecated: Use max_listen_connections.) The maximum length of the queue
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/// of pending incoming connections.
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#if defined(GENERATING_DOCUMENTATION)
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static const int max_connections = implementation_defined;
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#else
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ASIO_STATIC_CONSTANT(int, max_connections
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= ASIO_OS_DEF(SOMAXCONN));
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#endif
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#endif // !defined(ASIO_NO_DEPRECATED)
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protected:
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/// Protected destructor to prevent deletion through this type.
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~socket_base()
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{
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}
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};
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} // namespace asio
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#include "asio/detail/pop_options.hpp"
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#endif // ASIO_SOCKET_BASE_HPP
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