/usr/include/asio/basic_socket_acceptor.hpp is in libasio-dev 1.4.1-3ubuntu2.
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// basic_socket_acceptor.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2008 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#ifndef ASIO_BASIC_SOCKET_ACCEPTOR_HPP
#define ASIO_BASIC_SOCKET_ACCEPTOR_HPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include "asio/detail/push_options.hpp"
#include "asio/basic_io_object.hpp"
#include "asio/basic_socket.hpp"
#include "asio/error.hpp"
#include "asio/socket_acceptor_service.hpp"
#include "asio/socket_base.hpp"
#include "asio/detail/throw_error.hpp"
namespace asio {
/// Provides the ability to accept new connections.
/**
* The basic_socket_acceptor class template is used for accepting new socket
* connections.
*
* @par Thread Safety
* @e Distinct @e objects: Safe.@n
* @e Shared @e objects: Unsafe.
*
* @par Example
* Opening a socket acceptor with the SO_REUSEADDR option enabled:
* @code
* asio::ip::tcp::acceptor acceptor(io_service);
* asio::ip::tcp::endpoint endpoint(asio::ip::tcp::v4(), port);
* acceptor.open(endpoint.protocol());
* acceptor.set_option(asio::ip::tcp::acceptor::reuse_address(true));
* acceptor.bind(endpoint);
* acceptor.listen();
* @endcode
*/
template <typename Protocol,
typename SocketAcceptorService = socket_acceptor_service<Protocol> >
class basic_socket_acceptor
: public basic_io_object<SocketAcceptorService>,
public socket_base
{
public:
/// The native representation of an acceptor.
typedef typename SocketAcceptorService::native_type native_type;
/// The protocol type.
typedef Protocol protocol_type;
/// The endpoint type.
typedef typename Protocol::endpoint endpoint_type;
/// Construct an acceptor without opening it.
/**
* This constructor creates an acceptor without opening it to listen for new
* connections. The open() function must be called before the acceptor can
* accept new socket connections.
*
* @param io_service The io_service object that the acceptor will use to
* dispatch handlers for any asynchronous operations performed on the
* acceptor.
*/
explicit basic_socket_acceptor(asio::io_service& io_service)
: basic_io_object<SocketAcceptorService>(io_service)
{
}
/// Construct an open acceptor.
/**
* This constructor creates an acceptor and automatically opens it.
*
* @param io_service The io_service object that the acceptor will use to
* dispatch handlers for any asynchronous operations performed on the
* acceptor.
*
* @param protocol An object specifying protocol parameters to be used.
*
* @throws asio::system_error Thrown on failure.
*/
basic_socket_acceptor(asio::io_service& io_service,
const protocol_type& protocol)
: basic_io_object<SocketAcceptorService>(io_service)
{
asio::error_code ec;
this->service.open(this->implementation, protocol, ec);
asio::detail::throw_error(ec);
}
/// Construct an acceptor opened on the given endpoint.
/**
* This constructor creates an acceptor and automatically opens it to listen
* for new connections on the specified endpoint.
*
* @param io_service The io_service object that the acceptor will use to
* dispatch handlers for any asynchronous operations performed on the
* acceptor.
*
* @param endpoint An endpoint on the local machine on which the acceptor
* will listen for new connections.
*
* @param reuse_addr Whether the constructor should set the socket option
* socket_base::reuse_address.
*
* @throws asio::system_error Thrown on failure.
*
* @note This constructor is equivalent to the following code:
* @code
* basic_socket_acceptor<Protocol> acceptor(io_service);
* acceptor.open(endpoint.protocol());
* if (reuse_addr)
* acceptor.set_option(socket_base::reuse_address(true));
* acceptor.bind(endpoint);
* acceptor.listen(listen_backlog);
* @endcode
*/
basic_socket_acceptor(asio::io_service& io_service,
const endpoint_type& endpoint, bool reuse_addr = true)
: basic_io_object<SocketAcceptorService>(io_service)
{
asio::error_code ec;
this->service.open(this->implementation, endpoint.protocol(), ec);
asio::detail::throw_error(ec);
if (reuse_addr)
{
this->service.set_option(this->implementation,
socket_base::reuse_address(true), ec);
asio::detail::throw_error(ec);
}
this->service.bind(this->implementation, endpoint, ec);
asio::detail::throw_error(ec);
this->service.listen(this->implementation,
socket_base::max_connections, ec);
asio::detail::throw_error(ec);
}
/// Construct a basic_socket_acceptor on an existing native acceptor.
/**
* This constructor creates an acceptor object to hold an existing native
* acceptor.
*
* @param io_service The io_service object that the acceptor will use to
* dispatch handlers for any asynchronous operations performed on the
* acceptor.
*
* @param protocol An object specifying protocol parameters to be used.
*
* @param native_acceptor A native acceptor.
*
* @throws asio::system_error Thrown on failure.
*/
basic_socket_acceptor(asio::io_service& io_service,
const protocol_type& protocol, const native_type& native_acceptor)
: basic_io_object<SocketAcceptorService>(io_service)
{
asio::error_code ec;
this->service.assign(this->implementation, protocol, native_acceptor, ec);
asio::detail::throw_error(ec);
}
/// Open the acceptor using the specified protocol.
/**
* This function opens the socket acceptor so that it will use the specified
* protocol.
*
* @param protocol An object specifying which protocol is to be used.
*
* @throws asio::system_error Thrown on failure.
*
* @par Example
* @code
* asio::ip::tcp::acceptor acceptor(io_service);
* acceptor.open(asio::ip::tcp::v4());
* @endcode
*/
void open(const protocol_type& protocol = protocol_type())
{
asio::error_code ec;
this->service.open(this->implementation, protocol, ec);
asio::detail::throw_error(ec);
}
/// Open the acceptor using the specified protocol.
/**
* This function opens the socket acceptor so that it will use the specified
* protocol.
*
* @param protocol An object specifying which protocol is to be used.
*
* @param ec Set to indicate what error occurred, if any.
*
* @par Example
* @code
* asio::ip::tcp::acceptor acceptor(io_service);
* asio::error_code ec;
* acceptor.open(asio::ip::tcp::v4(), ec);
* if (ec)
* {
* // An error occurred.
* }
* @endcode
*/
asio::error_code open(const protocol_type& protocol,
asio::error_code& ec)
{
return this->service.open(this->implementation, protocol, ec);
}
/// Assigns an existing native acceptor to the acceptor.
/*
* This function opens the acceptor to hold an existing native acceptor.
*
* @param protocol An object specifying which protocol is to be used.
*
* @param native_acceptor A native acceptor.
*
* @throws asio::system_error Thrown on failure.
*/
void assign(const protocol_type& protocol, const native_type& native_acceptor)
{
asio::error_code ec;
this->service.assign(this->implementation, protocol, native_acceptor, ec);
asio::detail::throw_error(ec);
}
/// Assigns an existing native acceptor to the acceptor.
/*
* This function opens the acceptor to hold an existing native acceptor.
*
* @param protocol An object specifying which protocol is to be used.
*
* @param native_acceptor A native acceptor.
*
* @param ec Set to indicate what error occurred, if any.
*/
asio::error_code assign(const protocol_type& protocol,
const native_type& native_acceptor, asio::error_code& ec)
{
return this->service.assign(this->implementation,
protocol, native_acceptor, ec);
}
/// Determine whether the acceptor is open.
bool is_open() const
{
return this->service.is_open(this->implementation);
}
/// Bind the acceptor to the given local endpoint.
/**
* This function binds the socket acceptor to the specified endpoint on the
* local machine.
*
* @param endpoint An endpoint on the local machine to which the socket
* acceptor will be bound.
*
* @throws asio::system_error Thrown on failure.
*
* @par Example
* @code
* asio::ip::tcp::acceptor acceptor(io_service);
* acceptor.open(asio::ip::tcp::v4());
* acceptor.bind(asio::ip::tcp::endpoint(12345));
* @endcode
*/
void bind(const endpoint_type& endpoint)
{
asio::error_code ec;
this->service.bind(this->implementation, endpoint, ec);
asio::detail::throw_error(ec);
}
/// Bind the acceptor to the given local endpoint.
/**
* This function binds the socket acceptor to the specified endpoint on the
* local machine.
*
* @param endpoint An endpoint on the local machine to which the socket
* acceptor will be bound.
*
* @param ec Set to indicate what error occurred, if any.
*
* @par Example
* @code
* asio::ip::tcp::acceptor acceptor(io_service);
* acceptor.open(asio::ip::tcp::v4());
* asio::error_code ec;
* acceptor.bind(asio::ip::tcp::endpoint(12345), ec);
* if (ec)
* {
* // An error occurred.
* }
* @endcode
*/
asio::error_code bind(const endpoint_type& endpoint,
asio::error_code& ec)
{
return this->service.bind(this->implementation, endpoint, ec);
}
/// Place the acceptor into the state where it will listen for new
/// connections.
/**
* This function puts the socket acceptor into the state where it may accept
* new connections.
*
* @param backlog The maximum length of the queue of pending connections.
*
* @throws asio::system_error Thrown on failure.
*/
void listen(int backlog = socket_base::max_connections)
{
asio::error_code ec;
this->service.listen(this->implementation, backlog, ec);
asio::detail::throw_error(ec);
}
/// Place the acceptor into the state where it will listen for new
/// connections.
/**
* This function puts the socket acceptor into the state where it may accept
* new connections.
*
* @param backlog The maximum length of the queue of pending connections.
*
* @param ec Set to indicate what error occurred, if any.
*
* @par Example
* @code
* asio::ip::tcp::acceptor acceptor(io_service);
* ...
* asio::error_code ec;
* acceptor.listen(asio::socket_base::max_connections, ec);
* if (ec)
* {
* // An error occurred.
* }
* @endcode
*/
asio::error_code listen(int backlog, asio::error_code& ec)
{
return this->service.listen(this->implementation, backlog, ec);
}
/// Close the acceptor.
/**
* This function is used to close the acceptor. Any asynchronous accept
* operations will be cancelled immediately.
*
* A subsequent call to open() is required before the acceptor can again be
* used to again perform socket accept operations.
*
* @throws asio::system_error Thrown on failure.
*/
void close()
{
asio::error_code ec;
this->service.close(this->implementation, ec);
asio::detail::throw_error(ec);
}
/// Close the acceptor.
/**
* This function is used to close the acceptor. Any asynchronous accept
* operations will be cancelled immediately.
*
* A subsequent call to open() is required before the acceptor can again be
* used to again perform socket accept operations.
*
* @param ec Set to indicate what error occurred, if any.
*
* @par Example
* @code
* asio::ip::tcp::acceptor acceptor(io_service);
* ...
* asio::error_code ec;
* acceptor.close(ec);
* if (ec)
* {
* // An error occurred.
* }
* @endcode
*/
asio::error_code close(asio::error_code& ec)
{
return this->service.close(this->implementation, ec);
}
/// Get the native acceptor representation.
/**
* This function may be used to obtain the underlying representation of the
* acceptor. This is intended to allow access to native acceptor functionality
* that is not otherwise provided.
*/
native_type native()
{
return this->service.native(this->implementation);
}
/// Cancel all asynchronous operations associated with the acceptor.
/**
* This function causes all outstanding asynchronous connect, send and receive
* operations to finish immediately, and the handlers for cancelled operations
* will be passed the asio::error::operation_aborted error.
*
* @throws asio::system_error Thrown on failure.
*/
void cancel()
{
asio::error_code ec;
this->service.cancel(this->implementation, ec);
asio::detail::throw_error(ec);
}
/// Cancel all asynchronous operations associated with the acceptor.
/**
* This function causes all outstanding asynchronous connect, send and receive
* operations to finish immediately, and the handlers for cancelled operations
* will be passed the asio::error::operation_aborted error.
*
* @param ec Set to indicate what error occurred, if any.
*/
asio::error_code cancel(asio::error_code& ec)
{
return this->service.cancel(this->implementation, ec);
}
/// Set an option on the acceptor.
/**
* This function is used to set an option on the acceptor.
*
* @param option The new option value to be set on the acceptor.
*
* @throws asio::system_error Thrown on failure.
*
* @sa SettableSocketOption @n
* asio::socket_base::reuse_address
* asio::socket_base::enable_connection_aborted
*
* @par Example
* Setting the SOL_SOCKET/SO_REUSEADDR option:
* @code
* asio::ip::tcp::acceptor acceptor(io_service);
* ...
* asio::ip::tcp::acceptor::reuse_address option(true);
* acceptor.set_option(option);
* @endcode
*/
template <typename SettableSocketOption>
void set_option(const SettableSocketOption& option)
{
asio::error_code ec;
this->service.set_option(this->implementation, option, ec);
asio::detail::throw_error(ec);
}
/// Set an option on the acceptor.
/**
* This function is used to set an option on the acceptor.
*
* @param option The new option value to be set on the acceptor.
*
* @param ec Set to indicate what error occurred, if any.
*
* @sa SettableSocketOption @n
* asio::socket_base::reuse_address
* asio::socket_base::enable_connection_aborted
*
* @par Example
* Setting the SOL_SOCKET/SO_REUSEADDR option:
* @code
* asio::ip::tcp::acceptor acceptor(io_service);
* ...
* asio::ip::tcp::acceptor::reuse_address option(true);
* asio::error_code ec;
* acceptor.set_option(option, ec);
* if (ec)
* {
* // An error occurred.
* }
* @endcode
*/
template <typename SettableSocketOption>
asio::error_code set_option(const SettableSocketOption& option,
asio::error_code& ec)
{
return this->service.set_option(this->implementation, option, ec);
}
/// Get an option from the acceptor.
/**
* This function is used to get the current value of an option on the
* acceptor.
*
* @param option The option value to be obtained from the acceptor.
*
* @throws asio::system_error Thrown on failure.
*
* @sa GettableSocketOption @n
* asio::socket_base::reuse_address
*
* @par Example
* Getting the value of the SOL_SOCKET/SO_REUSEADDR option:
* @code
* asio::ip::tcp::acceptor acceptor(io_service);
* ...
* asio::ip::tcp::acceptor::reuse_address option;
* acceptor.get_option(option);
* bool is_set = option.get();
* @endcode
*/
template <typename GettableSocketOption>
void get_option(GettableSocketOption& option)
{
asio::error_code ec;
this->service.get_option(this->implementation, option, ec);
asio::detail::throw_error(ec);
}
/// Get an option from the acceptor.
/**
* This function is used to get the current value of an option on the
* acceptor.
*
* @param option The option value to be obtained from the acceptor.
*
* @param ec Set to indicate what error occurred, if any.
*
* @sa GettableSocketOption @n
* asio::socket_base::reuse_address
*
* @par Example
* Getting the value of the SOL_SOCKET/SO_REUSEADDR option:
* @code
* asio::ip::tcp::acceptor acceptor(io_service);
* ...
* asio::ip::tcp::acceptor::reuse_address option;
* asio::error_code ec;
* acceptor.get_option(option, ec);
* if (ec)
* {
* // An error occurred.
* }
* bool is_set = option.get();
* @endcode
*/
template <typename GettableSocketOption>
asio::error_code get_option(GettableSocketOption& option,
asio::error_code& ec)
{
return this->service.get_option(this->implementation, option, ec);
}
/// Get the local endpoint of the acceptor.
/**
* This function is used to obtain the locally bound endpoint of the acceptor.
*
* @returns An object that represents the local endpoint of the acceptor.
*
* @throws asio::system_error Thrown on failure.
*
* @par Example
* @code
* asio::ip::tcp::acceptor acceptor(io_service);
* ...
* asio::ip::tcp::endpoint endpoint = acceptor.local_endpoint();
* @endcode
*/
endpoint_type local_endpoint() const
{
asio::error_code ec;
endpoint_type ep = this->service.local_endpoint(this->implementation, ec);
asio::detail::throw_error(ec);
return ep;
}
/// Get the local endpoint of the acceptor.
/**
* This function is used to obtain the locally bound endpoint of the acceptor.
*
* @param ec Set to indicate what error occurred, if any.
*
* @returns An object that represents the local endpoint of the acceptor.
* Returns a default-constructed endpoint object if an error occurred and the
* error handler did not throw an exception.
*
* @par Example
* @code
* asio::ip::tcp::acceptor acceptor(io_service);
* ...
* asio::error_code ec;
* asio::ip::tcp::endpoint endpoint = acceptor.local_endpoint(ec);
* if (ec)
* {
* // An error occurred.
* }
* @endcode
*/
endpoint_type local_endpoint(asio::error_code& ec) const
{
return this->service.local_endpoint(this->implementation, ec);
}
/// Accept a new connection.
/**
* This function is used to accept a new connection from a peer into the
* given socket. The function call will block until a new connection has been
* accepted successfully or an error occurs.
*
* @param peer The socket into which the new connection will be accepted.
*
* @throws asio::system_error Thrown on failure.
*
* @par Example
* @code
* asio::ip::tcp::acceptor acceptor(io_service);
* ...
* asio::ip::tcp::socket socket(io_service);
* acceptor.accept(socket);
* @endcode
*/
template <typename SocketService>
void accept(basic_socket<protocol_type, SocketService>& peer)
{
asio::error_code ec;
this->service.accept(this->implementation, peer, 0, ec);
asio::detail::throw_error(ec);
}
/// Accept a new connection.
/**
* This function is used to accept a new connection from a peer into the
* given socket. The function call will block until a new connection has been
* accepted successfully or an error occurs.
*
* @param peer The socket into which the new connection will be accepted.
*
* @param ec Set to indicate what error occurred, if any.
*
* @par Example
* @code
* asio::ip::tcp::acceptor acceptor(io_service);
* ...
* asio::ip::tcp::soocket socket(io_service);
* asio::error_code ec;
* acceptor.accept(socket, ec);
* if (ec)
* {
* // An error occurred.
* }
* @endcode
*/
template <typename SocketService>
asio::error_code accept(
basic_socket<protocol_type, SocketService>& peer,
asio::error_code& ec)
{
return this->service.accept(this->implementation, peer, 0, ec);
}
/// Start an asynchronous accept.
/**
* This function is used to asynchronously accept a new connection into a
* socket. The function call always returns immediately.
*
* @param peer The socket into which the new connection will be accepted.
* Ownership of the peer object is retained by the caller, which must
* guarantee that it is valid until the handler is called.
*
* @param handler The handler to be called when the accept operation
* completes. Copies will be made of the handler as required. The function
* signature of the handler must be:
* @code void handler(
* const asio::error_code& error // Result of operation.
* ); @endcode
* Regardless of whether the asynchronous operation completes immediately or
* not, the handler will not be invoked from within this function. Invocation
* of the handler will be performed in a manner equivalent to using
* asio::io_service::post().
*
* @par Example
* @code
* void accept_handler(const asio::error_code& error)
* {
* if (!error)
* {
* // Accept succeeded.
* }
* }
*
* ...
*
* asio::ip::tcp::acceptor acceptor(io_service);
* ...
* asio::ip::tcp::socket socket(io_service);
* acceptor.async_accept(socket, accept_handler);
* @endcode
*/
template <typename SocketService, typename AcceptHandler>
void async_accept(basic_socket<protocol_type, SocketService>& peer,
AcceptHandler handler)
{
this->service.async_accept(this->implementation, peer, 0, handler);
}
/// Accept a new connection and obtain the endpoint of the peer
/**
* This function is used to accept a new connection from a peer into the
* given socket, and additionally provide the endpoint of the remote peer.
* The function call will block until a new connection has been accepted
* successfully or an error occurs.
*
* @param peer The socket into which the new connection will be accepted.
*
* @param peer_endpoint An endpoint object which will receive the endpoint of
* the remote peer.
*
* @throws asio::system_error Thrown on failure.
*
* @par Example
* @code
* asio::ip::tcp::acceptor acceptor(io_service);
* ...
* asio::ip::tcp::socket socket(io_service);
* asio::ip::tcp::endpoint endpoint;
* acceptor.accept(socket, endpoint);
* @endcode
*/
template <typename SocketService>
void accept(basic_socket<protocol_type, SocketService>& peer,
endpoint_type& peer_endpoint)
{
asio::error_code ec;
this->service.accept(this->implementation, peer, &peer_endpoint, ec);
asio::detail::throw_error(ec);
}
/// Accept a new connection and obtain the endpoint of the peer
/**
* This function is used to accept a new connection from a peer into the
* given socket, and additionally provide the endpoint of the remote peer.
* The function call will block until a new connection has been accepted
* successfully or an error occurs.
*
* @param peer The socket into which the new connection will be accepted.
*
* @param peer_endpoint An endpoint object which will receive the endpoint of
* the remote peer.
*
* @param ec Set to indicate what error occurred, if any.
*
* @par Example
* @code
* asio::ip::tcp::acceptor acceptor(io_service);
* ...
* asio::ip::tcp::socket socket(io_service);
* asio::ip::tcp::endpoint endpoint;
* asio::error_code ec;
* acceptor.accept(socket, endpoint, ec);
* if (ec)
* {
* // An error occurred.
* }
* @endcode
*/
template <typename SocketService>
asio::error_code accept(
basic_socket<protocol_type, SocketService>& peer,
endpoint_type& peer_endpoint, asio::error_code& ec)
{
return this->service.accept(this->implementation, peer, &peer_endpoint, ec);
}
/// Start an asynchronous accept.
/**
* This function is used to asynchronously accept a new connection into a
* socket, and additionally obtain the endpoint of the remote peer. The
* function call always returns immediately.
*
* @param peer The socket into which the new connection will be accepted.
* Ownership of the peer object is retained by the caller, which must
* guarantee that it is valid until the handler is called.
*
* @param peer_endpoint An endpoint object into which the endpoint of the
* remote peer will be written. Ownership of the peer_endpoint object is
* retained by the caller, which must guarantee that it is valid until the
* handler is called.
*
* @param handler The handler to be called when the accept operation
* completes. Copies will be made of the handler as required. The function
* signature of the handler must be:
* @code void handler(
* const asio::error_code& error // Result of operation.
* ); @endcode
* Regardless of whether the asynchronous operation completes immediately or
* not, the handler will not be invoked from within this function. Invocation
* of the handler will be performed in a manner equivalent to using
* asio::io_service::post().
*/
template <typename SocketService, typename AcceptHandler>
void async_accept(basic_socket<protocol_type, SocketService>& peer,
endpoint_type& peer_endpoint, AcceptHandler handler)
{
this->service.async_accept(this->implementation,
peer, &peer_endpoint, handler);
}
};
} // namespace asio
#include "asio/detail/pop_options.hpp"
#endif // ASIO_BASIC_SOCKET_ACCEPTOR_HPP
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