1//
2// basic_socket.hpp
3// ~~~~~~~~~~~~~~~~
4//
5// Copyright (c) 2003-2015 Christopher M. Kohlhoff (chris at kohlhoff dot com)
6//
7// Distributed under the Boost Software License, Version 1.0. (See accompanying
8// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
9//
10
11#ifndef BOOST_ASIO_BASIC_SOCKET_HPP
12#define BOOST_ASIO_BASIC_SOCKET_HPP
13
14#if defined(_MSC_VER) && (_MSC_VER >= 1200)
15# pragma once
16#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
17
18#include <boost/asio/detail/config.hpp>
19#include <boost/asio/async_result.hpp>
20#include <boost/asio/basic_io_object.hpp>
21#include <boost/asio/detail/handler_type_requirements.hpp>
22#include <boost/asio/detail/throw_error.hpp>
23#include <boost/asio/detail/type_traits.hpp>
24#include <boost/asio/error.hpp>
25#include <boost/asio/socket_base.hpp>
26
27#include <boost/asio/detail/push_options.hpp>
28
29namespace boost {
30namespace asio {
31
32/// Provides socket functionality.
33/**
34 * The basic_socket class template provides functionality that is common to both
35 * stream-oriented and datagram-oriented sockets.
36 *
37 * @par Thread Safety
38 * @e Distinct @e objects: Safe.@n
39 * @e Shared @e objects: Unsafe.
40 */
41template <typename Protocol, typename SocketService>
42class basic_socket
43 : public basic_io_object<SocketService>,
44 public socket_base
45{
46public:
47 /// (Deprecated: Use native_handle_type.) The native representation of a
48 /// socket.
49 typedef typename SocketService::native_handle_type native_type;
50
51 /// The native representation of a socket.
52 typedef typename SocketService::native_handle_type native_handle_type;
53
54 /// The protocol type.
55 typedef Protocol protocol_type;
56
57 /// The endpoint type.
58 typedef typename Protocol::endpoint endpoint_type;
59
60 /// A basic_socket is always the lowest layer.
61 typedef basic_socket<Protocol, SocketService> lowest_layer_type;
62
63 /// Construct a basic_socket without opening it.
64 /**
65 * This constructor creates a socket without opening it.
66 *
67 * @param io_service The io_service object that the socket will use to
68 * dispatch handlers for any asynchronous operations performed on the socket.
69 */
70 explicit basic_socket(boost::asio::io_service& io_service)
71 : basic_io_object<SocketService>(io_service)
72 {
73 }
74
75 /// Construct and open a basic_socket.
76 /**
77 * This constructor creates and opens a socket.
78 *
79 * @param io_service The io_service object that the socket will use to
80 * dispatch handlers for any asynchronous operations performed on the socket.
81 *
82 * @param protocol An object specifying protocol parameters to be used.
83 *
84 * @throws boost::system::system_error Thrown on failure.
85 */
86 basic_socket(boost::asio::io_service& io_service,
87 const protocol_type& protocol)
88 : basic_io_object<SocketService>(io_service)
89 {
90 boost::system::error_code ec;
91 this->get_service().open(this->get_implementation(), protocol, ec);
92 boost::asio::detail::throw_error(ec, "open");
93 }
94
95 /// Construct a basic_socket, opening it and binding it to the given local
96 /// endpoint.
97 /**
98 * This constructor creates a socket and automatically opens it bound to the
99 * specified endpoint on the local machine. The protocol used is the protocol
100 * associated with the given endpoint.
101 *
102 * @param io_service The io_service object that the socket will use to
103 * dispatch handlers for any asynchronous operations performed on the socket.
104 *
105 * @param endpoint An endpoint on the local machine to which the socket will
106 * be bound.
107 *
108 * @throws boost::system::system_error Thrown on failure.
109 */
110 basic_socket(boost::asio::io_service& io_service,
111 const endpoint_type& endpoint)
112 : basic_io_object<SocketService>(io_service)
113 {
114 boost::system::error_code ec;
115 const protocol_type protocol = endpoint.protocol();
116 this->get_service().open(this->get_implementation(), protocol, ec);
117 boost::asio::detail::throw_error(ec, "open");
118 this->get_service().bind(this->get_implementation(), endpoint, ec);
119 boost::asio::detail::throw_error(ec, "bind");
120 }
121
122 /// Construct a basic_socket on an existing native socket.
123 /**
124 * This constructor creates a socket object to hold an existing native socket.
125 *
126 * @param io_service The io_service object that the socket will use to
127 * dispatch handlers for any asynchronous operations performed on the socket.
128 *
129 * @param protocol An object specifying protocol parameters to be used.
130 *
131 * @param native_socket A native socket.
132 *
133 * @throws boost::system::system_error Thrown on failure.
134 */
135 basic_socket(boost::asio::io_service& io_service,
136 const protocol_type& protocol, const native_handle_type& native_socket)
137 : basic_io_object<SocketService>(io_service)
138 {
139 boost::system::error_code ec;
140 this->get_service().assign(this->get_implementation(),
141 protocol, native_socket, ec);
142 boost::asio::detail::throw_error(ec, "assign");
143 }
144
145#if defined(BOOST_ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
146 /// Move-construct a basic_socket from another.
147 /**
148 * This constructor moves a socket from one object to another.
149 *
150 * @param other The other basic_socket object from which the move will
151 * occur.
152 *
153 * @note Following the move, the moved-from object is in the same state as if
154 * constructed using the @c basic_socket(io_service&) constructor.
155 */
156 basic_socket(basic_socket&& other)
157 : basic_io_object<SocketService>(
158 BOOST_ASIO_MOVE_CAST(basic_socket)(other))
159 {
160 }
161
162 /// Move-assign a basic_socket from another.
163 /**
164 * This assignment operator moves a socket from one object to another.
165 *
166 * @param other The other basic_socket object from which the move will
167 * occur.
168 *
169 * @note Following the move, the moved-from object is in the same state as if
170 * constructed using the @c basic_socket(io_service&) constructor.
171 */
172 basic_socket& operator=(basic_socket&& other)
173 {
174 basic_io_object<SocketService>::operator=(
175 BOOST_ASIO_MOVE_CAST(basic_socket)(other));
176 return *this;
177 }
178
179 // All sockets have access to each other's implementations.
180 template <typename Protocol1, typename SocketService1>
181 friend class basic_socket;
182
183 /// Move-construct a basic_socket from a socket of another protocol type.
184 /**
185 * This constructor moves a socket from one object to another.
186 *
187 * @param other The other basic_socket object from which the move will
188 * occur.
189 *
190 * @note Following the move, the moved-from object is in the same state as if
191 * constructed using the @c basic_socket(io_service&) constructor.
192 */
193 template <typename Protocol1, typename SocketService1>
194 basic_socket(basic_socket<Protocol1, SocketService1>&& other,
195 typename enable_if<is_convertible<Protocol1, Protocol>::value>::type* = 0)
196 : basic_io_object<SocketService>(other.get_io_service())
197 {
198 this->get_service().template converting_move_construct<Protocol1>(
199 this->get_implementation(), other.get_implementation());
200 }
201
202 /// Move-assign a basic_socket from a socket of another protocol type.
203 /**
204 * This assignment operator moves a socket from one object to another.
205 *
206 * @param other The other basic_socket object from which the move will
207 * occur.
208 *
209 * @note Following the move, the moved-from object is in the same state as if
210 * constructed using the @c basic_socket(io_service&) constructor.
211 */
212 template <typename Protocol1, typename SocketService1>
213 typename enable_if<is_convertible<Protocol1, Protocol>::value,
214 basic_socket>::type& operator=(
215 basic_socket<Protocol1, SocketService1>&& other)
216 {
217 basic_socket tmp(BOOST_ASIO_MOVE_CAST2(basic_socket<
218 Protocol1, SocketService1>)(other));
219 basic_io_object<SocketService>::operator=(
220 BOOST_ASIO_MOVE_CAST(basic_socket)(tmp));
221 return *this;
222 }
223#endif // defined(BOOST_ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
224
225 /// Get a reference to the lowest layer.
226 /**
227 * This function returns a reference to the lowest layer in a stack of
228 * layers. Since a basic_socket cannot contain any further layers, it simply
229 * returns a reference to itself.
230 *
231 * @return A reference to the lowest layer in the stack of layers. Ownership
232 * is not transferred to the caller.
233 */
234 lowest_layer_type& lowest_layer()
235 {
236 return *this;
237 }
238
239 /// Get a const reference to the lowest layer.
240 /**
241 * This function returns a const reference to the lowest layer in a stack of
242 * layers. Since a basic_socket cannot contain any further layers, it simply
243 * returns a reference to itself.
244 *
245 * @return A const reference to the lowest layer in the stack of layers.
246 * Ownership is not transferred to the caller.
247 */
248 const lowest_layer_type& lowest_layer() const
249 {
250 return *this;
251 }
252
253 /// Open the socket using the specified protocol.
254 /**
255 * This function opens the socket so that it will use the specified protocol.
256 *
257 * @param protocol An object specifying protocol parameters to be used.
258 *
259 * @throws boost::system::system_error Thrown on failure.
260 *
261 * @par Example
262 * @code
263 * boost::asio::ip::tcp::socket socket(io_service);
264 * socket.open(boost::asio::ip::tcp::v4());
265 * @endcode
266 */
267 void open(const protocol_type& protocol = protocol_type())
268 {
269 boost::system::error_code ec;
270 this->get_service().open(this->get_implementation(), protocol, ec);
271 boost::asio::detail::throw_error(ec, "open");
272 }
273
274 /// Open the socket using the specified protocol.
275 /**
276 * This function opens the socket so that it will use the specified protocol.
277 *
278 * @param protocol An object specifying which protocol is to be used.
279 *
280 * @param ec Set to indicate what error occurred, if any.
281 *
282 * @par Example
283 * @code
284 * boost::asio::ip::tcp::socket socket(io_service);
285 * boost::system::error_code ec;
286 * socket.open(boost::asio::ip::tcp::v4(), ec);
287 * if (ec)
288 * {
289 * // An error occurred.
290 * }
291 * @endcode
292 */
293 boost::system::error_code open(const protocol_type& protocol,
294 boost::system::error_code& ec)
295 {
296 return this->get_service().open(this->get_implementation(), protocol, ec);
297 }
298
299 /// Assign an existing native socket to the socket.
300 /*
301 * This function opens the socket to hold an existing native socket.
302 *
303 * @param protocol An object specifying which protocol is to be used.
304 *
305 * @param native_socket A native socket.
306 *
307 * @throws boost::system::system_error Thrown on failure.
308 */
309 void assign(const protocol_type& protocol,
310 const native_handle_type& native_socket)
311 {
312 boost::system::error_code ec;
313 this->get_service().assign(this->get_implementation(),
314 protocol, native_socket, ec);
315 boost::asio::detail::throw_error(ec, "assign");
316 }
317
318 /// Assign an existing native socket to the socket.
319 /*
320 * This function opens the socket to hold an existing native socket.
321 *
322 * @param protocol An object specifying which protocol is to be used.
323 *
324 * @param native_socket A native socket.
325 *
326 * @param ec Set to indicate what error occurred, if any.
327 */
328 boost::system::error_code assign(const protocol_type& protocol,
329 const native_handle_type& native_socket, boost::system::error_code& ec)
330 {
331 return this->get_service().assign(this->get_implementation(),
332 protocol, native_socket, ec);
333 }
334
335 /// Determine whether the socket is open.
336 bool is_open() const
337 {
338 return this->get_service().is_open(this->get_implementation());
339 }
340
341 /// Close the socket.
342 /**
343 * This function is used to close the socket. Any asynchronous send, receive
344 * or connect operations will be cancelled immediately, and will complete
345 * with the boost::asio::error::operation_aborted error.
346 *
347 * @throws boost::system::system_error Thrown on failure. Note that, even if
348 * the function indicates an error, the underlying descriptor is closed.
349 *
350 * @note For portable behaviour with respect to graceful closure of a
351 * connected socket, call shutdown() before closing the socket.
352 */
353 void close()
354 {
355 boost::system::error_code ec;
356 this->get_service().close(this->get_implementation(), ec);
357 boost::asio::detail::throw_error(ec, "close");
358 }
359
360 /// Close the socket.
361 /**
362 * This function is used to close the socket. Any asynchronous send, receive
363 * or connect operations will be cancelled immediately, and will complete
364 * with the boost::asio::error::operation_aborted error.
365 *
366 * @param ec Set to indicate what error occurred, if any. Note that, even if
367 * the function indicates an error, the underlying descriptor is closed.
368 *
369 * @par Example
370 * @code
371 * boost::asio::ip::tcp::socket socket(io_service);
372 * ...
373 * boost::system::error_code ec;
374 * socket.close(ec);
375 * if (ec)
376 * {
377 * // An error occurred.
378 * }
379 * @endcode
380 *
381 * @note For portable behaviour with respect to graceful closure of a
382 * connected socket, call shutdown() before closing the socket.
383 */
384 boost::system::error_code close(boost::system::error_code& ec)
385 {
386 return this->get_service().close(this->get_implementation(), ec);
387 }
388
389 /// (Deprecated: Use native_handle().) Get the native socket representation.
390 /**
391 * This function may be used to obtain the underlying representation of the
392 * socket. This is intended to allow access to native socket functionality
393 * that is not otherwise provided.
394 */
395 native_type native()
396 {
397 return this->get_service().native_handle(this->get_implementation());
398 }
399
400 /// Get the native socket representation.
401 /**
402 * This function may be used to obtain the underlying representation of the
403 * socket. This is intended to allow access to native socket functionality
404 * that is not otherwise provided.
405 */
406 native_handle_type native_handle()
407 {
408 return this->get_service().native_handle(this->get_implementation());
409 }
410
411 /// Cancel all asynchronous operations associated with the socket.
412 /**
413 * This function causes all outstanding asynchronous connect, send and receive
414 * operations to finish immediately, and the handlers for cancelled operations
415 * will be passed the boost::asio::error::operation_aborted error.
416 *
417 * @throws boost::system::system_error Thrown on failure.
418 *
419 * @note Calls to cancel() will always fail with
420 * boost::asio::error::operation_not_supported when run on Windows XP, Windows
421 * Server 2003, and earlier versions of Windows, unless
422 * BOOST_ASIO_ENABLE_CANCELIO is defined. However, the CancelIo function has
423 * two issues that should be considered before enabling its use:
424 *
425 * @li It will only cancel asynchronous operations that were initiated in the
426 * current thread.
427 *
428 * @li It can appear to complete without error, but the request to cancel the
429 * unfinished operations may be silently ignored by the operating system.
430 * Whether it works or not seems to depend on the drivers that are installed.
431 *
432 * For portable cancellation, consider using one of the following
433 * alternatives:
434 *
435 * @li Disable asio's I/O completion port backend by defining
436 * BOOST_ASIO_DISABLE_IOCP.
437 *
438 * @li Use the close() function to simultaneously cancel the outstanding
439 * operations and close the socket.
440 *
441 * When running on Windows Vista, Windows Server 2008, and later, the
442 * CancelIoEx function is always used. This function does not have the
443 * problems described above.
444 */
445#if defined(BOOST_ASIO_MSVC) && (BOOST_ASIO_MSVC >= 1400) \
446 && (!defined(_WIN32_WINNT) || _WIN32_WINNT < 0x0600) \
447 && !defined(BOOST_ASIO_ENABLE_CANCELIO)
448 __declspec(deprecated("By default, this function always fails with "
449 "operation_not_supported when used on Windows XP, Windows Server 2003, "
450 "or earlier. Consult documentation for details."))
451#endif
452 void cancel()
453 {
454 boost::system::error_code ec;
455 this->get_service().cancel(this->get_implementation(), ec);
456 boost::asio::detail::throw_error(ec, "cancel");
457 }
458
459 /// Cancel all asynchronous operations associated with the socket.
460 /**
461 * This function causes all outstanding asynchronous connect, send and receive
462 * operations to finish immediately, and the handlers for cancelled operations
463 * will be passed the boost::asio::error::operation_aborted error.
464 *
465 * @param ec Set to indicate what error occurred, if any.
466 *
467 * @note Calls to cancel() will always fail with
468 * boost::asio::error::operation_not_supported when run on Windows XP, Windows
469 * Server 2003, and earlier versions of Windows, unless
470 * BOOST_ASIO_ENABLE_CANCELIO is defined. However, the CancelIo function has
471 * two issues that should be considered before enabling its use:
472 *
473 * @li It will only cancel asynchronous operations that were initiated in the
474 * current thread.
475 *
476 * @li It can appear to complete without error, but the request to cancel the
477 * unfinished operations may be silently ignored by the operating system.
478 * Whether it works or not seems to depend on the drivers that are installed.
479 *
480 * For portable cancellation, consider using one of the following
481 * alternatives:
482 *
483 * @li Disable asio's I/O completion port backend by defining
484 * BOOST_ASIO_DISABLE_IOCP.
485 *
486 * @li Use the close() function to simultaneously cancel the outstanding
487 * operations and close the socket.
488 *
489 * When running on Windows Vista, Windows Server 2008, and later, the
490 * CancelIoEx function is always used. This function does not have the
491 * problems described above.
492 */
493#if defined(BOOST_ASIO_MSVC) && (BOOST_ASIO_MSVC >= 1400) \
494 && (!defined(_WIN32_WINNT) || _WIN32_WINNT < 0x0600) \
495 && !defined(BOOST_ASIO_ENABLE_CANCELIO)
496 __declspec(deprecated("By default, this function always fails with "
497 "operation_not_supported when used on Windows XP, Windows Server 2003, "
498 "or earlier. Consult documentation for details."))
499#endif
500 boost::system::error_code cancel(boost::system::error_code& ec)
501 {
502 return this->get_service().cancel(this->get_implementation(), ec);
503 }
504
505 /// Determine whether the socket is at the out-of-band data mark.
506 /**
507 * This function is used to check whether the socket input is currently
508 * positioned at the out-of-band data mark.
509 *
510 * @return A bool indicating whether the socket is at the out-of-band data
511 * mark.
512 *
513 * @throws boost::system::system_error Thrown on failure.
514 */
515 bool at_mark() const
516 {
517 boost::system::error_code ec;
518 bool b = this->get_service().at_mark(this->get_implementation(), ec);
519 boost::asio::detail::throw_error(ec, "at_mark");
520 return b;
521 }
522
523 /// Determine whether the socket is at the out-of-band data mark.
524 /**
525 * This function is used to check whether the socket input is currently
526 * positioned at the out-of-band data mark.
527 *
528 * @param ec Set to indicate what error occurred, if any.
529 *
530 * @return A bool indicating whether the socket is at the out-of-band data
531 * mark.
532 */
533 bool at_mark(boost::system::error_code& ec) const
534 {
535 return this->get_service().at_mark(this->get_implementation(), ec);
536 }
537
538 /// Determine the number of bytes available for reading.
539 /**
540 * This function is used to determine the number of bytes that may be read
541 * without blocking.
542 *
543 * @return The number of bytes that may be read without blocking, or 0 if an
544 * error occurs.
545 *
546 * @throws boost::system::system_error Thrown on failure.
547 */
548 std::size_t available() const
549 {
550 boost::system::error_code ec;
551 std::size_t s = this->get_service().available(
552 this->get_implementation(), ec);
553 boost::asio::detail::throw_error(ec, "available");
554 return s;
555 }
556
557 /// Determine the number of bytes available for reading.
558 /**
559 * This function is used to determine the number of bytes that may be read
560 * without blocking.
561 *
562 * @param ec Set to indicate what error occurred, if any.
563 *
564 * @return The number of bytes that may be read without blocking, or 0 if an
565 * error occurs.
566 */
567 std::size_t available(boost::system::error_code& ec) const
568 {
569 return this->get_service().available(this->get_implementation(), ec);
570 }
571
572 /// Bind the socket to the given local endpoint.
573 /**
574 * This function binds the socket to the specified endpoint on the local
575 * machine.
576 *
577 * @param endpoint An endpoint on the local machine to which the socket will
578 * be bound.
579 *
580 * @throws boost::system::system_error Thrown on failure.
581 *
582 * @par Example
583 * @code
584 * boost::asio::ip::tcp::socket socket(io_service);
585 * socket.open(boost::asio::ip::tcp::v4());
586 * socket.bind(boost::asio::ip::tcp::endpoint(
587 * boost::asio::ip::tcp::v4(), 12345));
588 * @endcode
589 */
590 void bind(const endpoint_type& endpoint)
591 {
592 boost::system::error_code ec;
593 this->get_service().bind(this->get_implementation(), endpoint, ec);
594 boost::asio::detail::throw_error(ec, "bind");
595 }
596
597 /// Bind the socket to the given local endpoint.
598 /**
599 * This function binds the socket to the specified endpoint on the local
600 * machine.
601 *
602 * @param endpoint An endpoint on the local machine to which the socket will
603 * be bound.
604 *
605 * @param ec Set to indicate what error occurred, if any.
606 *
607 * @par Example
608 * @code
609 * boost::asio::ip::tcp::socket socket(io_service);
610 * socket.open(boost::asio::ip::tcp::v4());
611 * boost::system::error_code ec;
612 * socket.bind(boost::asio::ip::tcp::endpoint(
613 * boost::asio::ip::tcp::v4(), 12345), ec);
614 * if (ec)
615 * {
616 * // An error occurred.
617 * }
618 * @endcode
619 */
620 boost::system::error_code bind(const endpoint_type& endpoint,
621 boost::system::error_code& ec)
622 {
623 return this->get_service().bind(this->get_implementation(), endpoint, ec);
624 }
625
626 /// Connect the socket to the specified endpoint.
627 /**
628 * This function is used to connect a socket to the specified remote endpoint.
629 * The function call will block until the connection is successfully made or
630 * an error occurs.
631 *
632 * The socket is automatically opened if it is not already open. If the
633 * connect fails, and the socket was automatically opened, the socket is
634 * not returned to the closed state.
635 *
636 * @param peer_endpoint The remote endpoint to which the socket will be
637 * connected.
638 *
639 * @throws boost::system::system_error Thrown on failure.
640 *
641 * @par Example
642 * @code
643 * boost::asio::ip::tcp::socket socket(io_service);
644 * boost::asio::ip::tcp::endpoint endpoint(
645 * boost::asio::ip::address::from_string("1.2.3.4"), 12345);
646 * socket.connect(endpoint);
647 * @endcode
648 */
649 void connect(const endpoint_type& peer_endpoint)
650 {
651 boost::system::error_code ec;
652 if (!is_open())
653 {
654 this->get_service().open(this->get_implementation(),
655 peer_endpoint.protocol(), ec);
656 boost::asio::detail::throw_error(ec, "connect");
657 }
658 this->get_service().connect(this->get_implementation(), peer_endpoint, ec);
659 boost::asio::detail::throw_error(ec, "connect");
660 }
661
662 /// Connect the socket to the specified endpoint.
663 /**
664 * This function is used to connect a socket to the specified remote endpoint.
665 * The function call will block until the connection is successfully made or
666 * an error occurs.
667 *
668 * The socket is automatically opened if it is not already open. If the
669 * connect fails, and the socket was automatically opened, the socket is
670 * not returned to the closed state.
671 *
672 * @param peer_endpoint The remote endpoint to which the socket will be
673 * connected.
674 *
675 * @param ec Set to indicate what error occurred, if any.
676 *
677 * @par Example
678 * @code
679 * boost::asio::ip::tcp::socket socket(io_service);
680 * boost::asio::ip::tcp::endpoint endpoint(
681 * boost::asio::ip::address::from_string("1.2.3.4"), 12345);
682 * boost::system::error_code ec;
683 * socket.connect(endpoint, ec);
684 * if (ec)
685 * {
686 * // An error occurred.
687 * }
688 * @endcode
689 */
690 boost::system::error_code connect(const endpoint_type& peer_endpoint,
691 boost::system::error_code& ec)
692 {
693 if (!is_open())
694 {
695 if (this->get_service().open(this->get_implementation(),
696 peer_endpoint.protocol(), ec))
697 {
698 return ec;
699 }
700 }
701
702 return this->get_service().connect(
703 this->get_implementation(), peer_endpoint, ec);
704 }
705
706 /// Start an asynchronous connect.
707 /**
708 * This function is used to asynchronously connect a socket to the specified
709 * remote endpoint. The function call always returns immediately.
710 *
711 * The socket is automatically opened if it is not already open. If the
712 * connect fails, and the socket was automatically opened, the socket is
713 * not returned to the closed state.
714 *
715 * @param peer_endpoint The remote endpoint to which the socket will be
716 * connected. Copies will be made of the endpoint object as required.
717 *
718 * @param handler The handler to be called when the connection operation
719 * completes. Copies will be made of the handler as required. The function
720 * signature of the handler must be:
721 * @code void handler(
722 * const boost::system::error_code& error // Result of operation
723 * ); @endcode
724 * Regardless of whether the asynchronous operation completes immediately or
725 * not, the handler will not be invoked from within this function. Invocation
726 * of the handler will be performed in a manner equivalent to using
727 * boost::asio::io_service::post().
728 *
729 * @par Example
730 * @code
731 * void connect_handler(const boost::system::error_code& error)
732 * {
733 * if (!error)
734 * {
735 * // Connect succeeded.
736 * }
737 * }
738 *
739 * ...
740 *
741 * boost::asio::ip::tcp::socket socket(io_service);
742 * boost::asio::ip::tcp::endpoint endpoint(
743 * boost::asio::ip::address::from_string("1.2.3.4"), 12345);
744 * socket.async_connect(endpoint, connect_handler);
745 * @endcode
746 */
747 template <typename ConnectHandler>
748 BOOST_ASIO_INITFN_RESULT_TYPE(ConnectHandler,
749 void (boost::system::error_code))
750 async_connect(const endpoint_type& peer_endpoint,
751 BOOST_ASIO_MOVE_ARG(ConnectHandler) handler)
752 {
753 // If you get an error on the following line it means that your handler does
754 // not meet the documented type requirements for a ConnectHandler.
755 BOOST_ASIO_CONNECT_HANDLER_CHECK(ConnectHandler, handler) type_check;
756
757 if (!is_open())
758 {
759 boost::system::error_code ec;
760 const protocol_type protocol = peer_endpoint.protocol();
761 if (this->get_service().open(this->get_implementation(), protocol, ec))
762 {
763 detail::async_result_init<
764 ConnectHandler, void (boost::system::error_code)> init(
765 BOOST_ASIO_MOVE_CAST(ConnectHandler)(handler));
766
767 this->get_io_service().post(
768 boost::asio::detail::bind_handler(
769 BOOST_ASIO_MOVE_CAST(BOOST_ASIO_HANDLER_TYPE(
770 ConnectHandler, void (boost::system::error_code)))(
771 init.handler), ec));
772
773 return init.result.get();
774 }
775 }
776
777 return this->get_service().async_connect(this->get_implementation(),
778 peer_endpoint, BOOST_ASIO_MOVE_CAST(ConnectHandler)(handler));
779 }
780
781 /// Set an option on the socket.
782 /**
783 * This function is used to set an option on the socket.
784 *
785 * @param option The new option value to be set on the socket.
786 *
787 * @throws boost::system::system_error Thrown on failure.
788 *
789 * @sa SettableSocketOption @n
790 * boost::asio::socket_base::broadcast @n
791 * boost::asio::socket_base::do_not_route @n
792 * boost::asio::socket_base::keep_alive @n
793 * boost::asio::socket_base::linger @n
794 * boost::asio::socket_base::receive_buffer_size @n
795 * boost::asio::socket_base::receive_low_watermark @n
796 * boost::asio::socket_base::reuse_address @n
797 * boost::asio::socket_base::send_buffer_size @n
798 * boost::asio::socket_base::send_low_watermark @n
799 * boost::asio::ip::multicast::join_group @n
800 * boost::asio::ip::multicast::leave_group @n
801 * boost::asio::ip::multicast::enable_loopback @n
802 * boost::asio::ip::multicast::outbound_interface @n
803 * boost::asio::ip::multicast::hops @n
804 * boost::asio::ip::tcp::no_delay
805 *
806 * @par Example
807 * Setting the IPPROTO_TCP/TCP_NODELAY option:
808 * @code
809 * boost::asio::ip::tcp::socket socket(io_service);
810 * ...
811 * boost::asio::ip::tcp::no_delay option(true);
812 * socket.set_option(option);
813 * @endcode
814 */
815 template <typename SettableSocketOption>
816 void set_option(const SettableSocketOption& option)
817 {
818 boost::system::error_code ec;
819 this->get_service().set_option(this->get_implementation(), option, ec);
820 boost::asio::detail::throw_error(ec, "set_option");
821 }
822
823 /// Set an option on the socket.
824 /**
825 * This function is used to set an option on the socket.
826 *
827 * @param option The new option value to be set on the socket.
828 *
829 * @param ec Set to indicate what error occurred, if any.
830 *
831 * @sa SettableSocketOption @n
832 * boost::asio::socket_base::broadcast @n
833 * boost::asio::socket_base::do_not_route @n
834 * boost::asio::socket_base::keep_alive @n
835 * boost::asio::socket_base::linger @n
836 * boost::asio::socket_base::receive_buffer_size @n
837 * boost::asio::socket_base::receive_low_watermark @n
838 * boost::asio::socket_base::reuse_address @n
839 * boost::asio::socket_base::send_buffer_size @n
840 * boost::asio::socket_base::send_low_watermark @n
841 * boost::asio::ip::multicast::join_group @n
842 * boost::asio::ip::multicast::leave_group @n
843 * boost::asio::ip::multicast::enable_loopback @n
844 * boost::asio::ip::multicast::outbound_interface @n
845 * boost::asio::ip::multicast::hops @n
846 * boost::asio::ip::tcp::no_delay
847 *
848 * @par Example
849 * Setting the IPPROTO_TCP/TCP_NODELAY option:
850 * @code
851 * boost::asio::ip::tcp::socket socket(io_service);
852 * ...
853 * boost::asio::ip::tcp::no_delay option(true);
854 * boost::system::error_code ec;
855 * socket.set_option(option, ec);
856 * if (ec)
857 * {
858 * // An error occurred.
859 * }
860 * @endcode
861 */
862 template <typename SettableSocketOption>
863 boost::system::error_code set_option(const SettableSocketOption& option,
864 boost::system::error_code& ec)
865 {
866 return this->get_service().set_option(
867 this->get_implementation(), option, ec);
868 }
869
870 /// Get an option from the socket.
871 /**
872 * This function is used to get the current value of an option on the socket.
873 *
874 * @param option The option value to be obtained from the socket.
875 *
876 * @throws boost::system::system_error Thrown on failure.
877 *
878 * @sa GettableSocketOption @n
879 * boost::asio::socket_base::broadcast @n
880 * boost::asio::socket_base::do_not_route @n
881 * boost::asio::socket_base::keep_alive @n
882 * boost::asio::socket_base::linger @n
883 * boost::asio::socket_base::receive_buffer_size @n
884 * boost::asio::socket_base::receive_low_watermark @n
885 * boost::asio::socket_base::reuse_address @n
886 * boost::asio::socket_base::send_buffer_size @n
887 * boost::asio::socket_base::send_low_watermark @n
888 * boost::asio::ip::multicast::join_group @n
889 * boost::asio::ip::multicast::leave_group @n
890 * boost::asio::ip::multicast::enable_loopback @n
891 * boost::asio::ip::multicast::outbound_interface @n
892 * boost::asio::ip::multicast::hops @n
893 * boost::asio::ip::tcp::no_delay
894 *
895 * @par Example
896 * Getting the value of the SOL_SOCKET/SO_KEEPALIVE option:
897 * @code
898 * boost::asio::ip::tcp::socket socket(io_service);
899 * ...
900 * boost::asio::ip::tcp::socket::keep_alive option;
901 * socket.get_option(option);
902 * bool is_set = option.value();
903 * @endcode
904 */
905 template <typename GettableSocketOption>
906 void get_option(GettableSocketOption& option) const
907 {
908 boost::system::error_code ec;
909 this->get_service().get_option(this->get_implementation(), option, ec);
910 boost::asio::detail::throw_error(ec, "get_option");
911 }
912
913 /// Get an option from the socket.
914 /**
915 * This function is used to get the current value of an option on the socket.
916 *
917 * @param option The option value to be obtained from the socket.
918 *
919 * @param ec Set to indicate what error occurred, if any.
920 *
921 * @sa GettableSocketOption @n
922 * boost::asio::socket_base::broadcast @n
923 * boost::asio::socket_base::do_not_route @n
924 * boost::asio::socket_base::keep_alive @n
925 * boost::asio::socket_base::linger @n
926 * boost::asio::socket_base::receive_buffer_size @n
927 * boost::asio::socket_base::receive_low_watermark @n
928 * boost::asio::socket_base::reuse_address @n
929 * boost::asio::socket_base::send_buffer_size @n
930 * boost::asio::socket_base::send_low_watermark @n
931 * boost::asio::ip::multicast::join_group @n
932 * boost::asio::ip::multicast::leave_group @n
933 * boost::asio::ip::multicast::enable_loopback @n
934 * boost::asio::ip::multicast::outbound_interface @n
935 * boost::asio::ip::multicast::hops @n
936 * boost::asio::ip::tcp::no_delay
937 *
938 * @par Example
939 * Getting the value of the SOL_SOCKET/SO_KEEPALIVE option:
940 * @code
941 * boost::asio::ip::tcp::socket socket(io_service);
942 * ...
943 * boost::asio::ip::tcp::socket::keep_alive option;
944 * boost::system::error_code ec;
945 * socket.get_option(option, ec);
946 * if (ec)
947 * {
948 * // An error occurred.
949 * }
950 * bool is_set = option.value();
951 * @endcode
952 */
953 template <typename GettableSocketOption>
954 boost::system::error_code get_option(GettableSocketOption& option,
955 boost::system::error_code& ec) const
956 {
957 return this->get_service().get_option(
958 this->get_implementation(), option, ec);
959 }
960
961 /// Perform an IO control command on the socket.
962 /**
963 * This function is used to execute an IO control command on the socket.
964 *
965 * @param command The IO control command to be performed on the socket.
966 *
967 * @throws boost::system::system_error Thrown on failure.
968 *
969 * @sa IoControlCommand @n
970 * boost::asio::socket_base::bytes_readable @n
971 * boost::asio::socket_base::non_blocking_io
972 *
973 * @par Example
974 * Getting the number of bytes ready to read:
975 * @code
976 * boost::asio::ip::tcp::socket socket(io_service);
977 * ...
978 * boost::asio::ip::tcp::socket::bytes_readable command;
979 * socket.io_control(command);
980 * std::size_t bytes_readable = command.get();
981 * @endcode
982 */
983 template <typename IoControlCommand>
984 void io_control(IoControlCommand& command)
985 {
986 boost::system::error_code ec;
987 this->get_service().io_control(this->get_implementation(), command, ec);
988 boost::asio::detail::throw_error(ec, "io_control");
989 }
990
991 /// Perform an IO control command on the socket.
992 /**
993 * This function is used to execute an IO control command on the socket.
994 *
995 * @param command The IO control command to be performed on the socket.
996 *
997 * @param ec Set to indicate what error occurred, if any.
998 *
999 * @sa IoControlCommand @n
1000 * boost::asio::socket_base::bytes_readable @n
1001 * boost::asio::socket_base::non_blocking_io
1002 *
1003 * @par Example
1004 * Getting the number of bytes ready to read:
1005 * @code
1006 * boost::asio::ip::tcp::socket socket(io_service);
1007 * ...
1008 * boost::asio::ip::tcp::socket::bytes_readable command;
1009 * boost::system::error_code ec;
1010 * socket.io_control(command, ec);
1011 * if (ec)
1012 * {
1013 * // An error occurred.
1014 * }
1015 * std::size_t bytes_readable = command.get();
1016 * @endcode
1017 */
1018 template <typename IoControlCommand>
1019 boost::system::error_code io_control(IoControlCommand& command,
1020 boost::system::error_code& ec)
1021 {
1022 return this->get_service().io_control(
1023 this->get_implementation(), command, ec);
1024 }
1025
1026 /// Gets the non-blocking mode of the socket.
1027 /**
1028 * @returns @c true if the socket's synchronous operations will fail with
1029 * boost::asio::error::would_block if they are unable to perform the requested
1030 * operation immediately. If @c false, synchronous operations will block
1031 * until complete.
1032 *
1033 * @note The non-blocking mode has no effect on the behaviour of asynchronous
1034 * operations. Asynchronous operations will never fail with the error
1035 * boost::asio::error::would_block.
1036 */
1037 bool non_blocking() const
1038 {
1039 return this->get_service().non_blocking(this->get_implementation());
1040 }
1041
1042 /// Sets the non-blocking mode of the socket.
1043 /**
1044 * @param mode If @c true, the socket's synchronous operations will fail with
1045 * boost::asio::error::would_block if they are unable to perform the requested
1046 * operation immediately. If @c false, synchronous operations will block
1047 * until complete.
1048 *
1049 * @throws boost::system::system_error Thrown on failure.
1050 *
1051 * @note The non-blocking mode has no effect on the behaviour of asynchronous
1052 * operations. Asynchronous operations will never fail with the error
1053 * boost::asio::error::would_block.
1054 */
1055 void non_blocking(bool mode)
1056 {
1057 boost::system::error_code ec;
1058 this->get_service().non_blocking(this->get_implementation(), mode, ec);
1059 boost::asio::detail::throw_error(ec, "non_blocking");
1060 }
1061
1062 /// Sets the non-blocking mode of the socket.
1063 /**
1064 * @param mode If @c true, the socket's synchronous operations will fail with
1065 * boost::asio::error::would_block if they are unable to perform the requested
1066 * operation immediately. If @c false, synchronous operations will block
1067 * until complete.
1068 *
1069 * @param ec Set to indicate what error occurred, if any.
1070 *
1071 * @note The non-blocking mode has no effect on the behaviour of asynchronous
1072 * operations. Asynchronous operations will never fail with the error
1073 * boost::asio::error::would_block.
1074 */
1075 boost::system::error_code non_blocking(
1076 bool mode, boost::system::error_code& ec)
1077 {
1078 return this->get_service().non_blocking(
1079 this->get_implementation(), mode, ec);
1080 }
1081
1082 /// Gets the non-blocking mode of the native socket implementation.
1083 /**
1084 * This function is used to retrieve the non-blocking mode of the underlying
1085 * native socket. This mode has no effect on the behaviour of the socket
1086 * object's synchronous operations.
1087 *
1088 * @returns @c true if the underlying socket is in non-blocking mode and
1089 * direct system calls may fail with boost::asio::error::would_block (or the
1090 * equivalent system error).
1091 *
1092 * @note The current non-blocking mode is cached by the socket object.
1093 * Consequently, the return value may be incorrect if the non-blocking mode
1094 * was set directly on the native socket.
1095 *
1096 * @par Example
1097 * This function is intended to allow the encapsulation of arbitrary
1098 * non-blocking system calls as asynchronous operations, in a way that is
1099 * transparent to the user of the socket object. The following example
1100 * illustrates how Linux's @c sendfile system call might be encapsulated:
1101 * @code template <typename Handler>
1102 * struct sendfile_op
1103 * {
1104 * tcp::socket& sock_;
1105 * int fd_;
1106 * Handler handler_;
1107 * off_t offset_;
1108 * std::size_t total_bytes_transferred_;
1109 *
1110 * // Function call operator meeting WriteHandler requirements.
1111 * // Used as the handler for the async_write_some operation.
1112 * void operator()(boost::system::error_code ec, std::size_t)
1113 * {
1114 * // Put the underlying socket into non-blocking mode.
1115 * if (!ec)
1116 * if (!sock_.native_non_blocking())
1117 * sock_.native_non_blocking(true, ec);
1118 *
1119 * if (!ec)
1120 * {
1121 * for (;;)
1122 * {
1123 * // Try the system call.
1124 * errno = 0;
1125 * int n = ::sendfile(sock_.native_handle(), fd_, &offset_, 65536);
1126 * ec = boost::system::error_code(n < 0 ? errno : 0,
1127 * boost::asio::error::get_system_category());
1128 * total_bytes_transferred_ += ec ? 0 : n;
1129 *
1130 * // Retry operation immediately if interrupted by signal.
1131 * if (ec == boost::asio::error::interrupted)
1132 * continue;
1133 *
1134 * // Check if we need to run the operation again.
1135 * if (ec == boost::asio::error::would_block
1136 * || ec == boost::asio::error::try_again)
1137 * {
1138 * // We have to wait for the socket to become ready again.
1139 * sock_.async_write_some(boost::asio::null_buffers(), *this);
1140 * return;
1141 * }
1142 *
1143 * if (ec || n == 0)
1144 * {
1145 * // An error occurred, or we have reached the end of the file.
1146 * // Either way we must exit the loop so we can call the handler.
1147 * break;
1148 * }
1149 *
1150 * // Loop around to try calling sendfile again.
1151 * }
1152 * }
1153 *
1154 * // Pass result back to user's handler.
1155 * handler_(ec, total_bytes_transferred_);
1156 * }
1157 * };
1158 *
1159 * template <typename Handler>
1160 * void async_sendfile(tcp::socket& sock, int fd, Handler h)
1161 * {
1162 * sendfile_op<Handler> op = { sock, fd, h, 0, 0 };
1163 * sock.async_write_some(boost::asio::null_buffers(), op);
1164 * } @endcode
1165 */
1166 bool native_non_blocking() const
1167 {
1168 return this->get_service().native_non_blocking(this->get_implementation());
1169 }
1170
1171 /// Sets the non-blocking mode of the native socket implementation.
1172 /**
1173 * This function is used to modify the non-blocking mode of the underlying
1174 * native socket. It has no effect on the behaviour of the socket object's
1175 * synchronous operations.
1176 *
1177 * @param mode If @c true, the underlying socket is put into non-blocking
1178 * mode and direct system calls may fail with boost::asio::error::would_block
1179 * (or the equivalent system error).
1180 *
1181 * @throws boost::system::system_error Thrown on failure. If the @c mode is
1182 * @c false, but the current value of @c non_blocking() is @c true, this
1183 * function fails with boost::asio::error::invalid_argument, as the
1184 * combination does not make sense.
1185 *
1186 * @par Example
1187 * This function is intended to allow the encapsulation of arbitrary
1188 * non-blocking system calls as asynchronous operations, in a way that is
1189 * transparent to the user of the socket object. The following example
1190 * illustrates how Linux's @c sendfile system call might be encapsulated:
1191 * @code template <typename Handler>
1192 * struct sendfile_op
1193 * {
1194 * tcp::socket& sock_;
1195 * int fd_;
1196 * Handler handler_;
1197 * off_t offset_;
1198 * std::size_t total_bytes_transferred_;
1199 *
1200 * // Function call operator meeting WriteHandler requirements.
1201 * // Used as the handler for the async_write_some operation.
1202 * void operator()(boost::system::error_code ec, std::size_t)
1203 * {
1204 * // Put the underlying socket into non-blocking mode.
1205 * if (!ec)
1206 * if (!sock_.native_non_blocking())
1207 * sock_.native_non_blocking(true, ec);
1208 *
1209 * if (!ec)
1210 * {
1211 * for (;;)
1212 * {
1213 * // Try the system call.
1214 * errno = 0;
1215 * int n = ::sendfile(sock_.native_handle(), fd_, &offset_, 65536);
1216 * ec = boost::system::error_code(n < 0 ? errno : 0,
1217 * boost::asio::error::get_system_category());
1218 * total_bytes_transferred_ += ec ? 0 : n;
1219 *
1220 * // Retry operation immediately if interrupted by signal.
1221 * if (ec == boost::asio::error::interrupted)
1222 * continue;
1223 *
1224 * // Check if we need to run the operation again.
1225 * if (ec == boost::asio::error::would_block
1226 * || ec == boost::asio::error::try_again)
1227 * {
1228 * // We have to wait for the socket to become ready again.
1229 * sock_.async_write_some(boost::asio::null_buffers(), *this);
1230 * return;
1231 * }
1232 *
1233 * if (ec || n == 0)
1234 * {
1235 * // An error occurred, or we have reached the end of the file.
1236 * // Either way we must exit the loop so we can call the handler.
1237 * break;
1238 * }
1239 *
1240 * // Loop around to try calling sendfile again.
1241 * }
1242 * }
1243 *
1244 * // Pass result back to user's handler.
1245 * handler_(ec, total_bytes_transferred_);
1246 * }
1247 * };
1248 *
1249 * template <typename Handler>
1250 * void async_sendfile(tcp::socket& sock, int fd, Handler h)
1251 * {
1252 * sendfile_op<Handler> op = { sock, fd, h, 0, 0 };
1253 * sock.async_write_some(boost::asio::null_buffers(), op);
1254 * } @endcode
1255 */
1256 void native_non_blocking(bool mode)
1257 {
1258 boost::system::error_code ec;
1259 this->get_service().native_non_blocking(
1260 this->get_implementation(), mode, ec);
1261 boost::asio::detail::throw_error(ec, "native_non_blocking");
1262 }
1263
1264 /// Sets the non-blocking mode of the native socket implementation.
1265 /**
1266 * This function is used to modify the non-blocking mode of the underlying
1267 * native socket. It has no effect on the behaviour of the socket object's
1268 * synchronous operations.
1269 *
1270 * @param mode If @c true, the underlying socket is put into non-blocking
1271 * mode and direct system calls may fail with boost::asio::error::would_block
1272 * (or the equivalent system error).
1273 *
1274 * @param ec Set to indicate what error occurred, if any. If the @c mode is
1275 * @c false, but the current value of @c non_blocking() is @c true, this
1276 * function fails with boost::asio::error::invalid_argument, as the
1277 * combination does not make sense.
1278 *
1279 * @par Example
1280 * This function is intended to allow the encapsulation of arbitrary
1281 * non-blocking system calls as asynchronous operations, in a way that is
1282 * transparent to the user of the socket object. The following example
1283 * illustrates how Linux's @c sendfile system call might be encapsulated:
1284 * @code template <typename Handler>
1285 * struct sendfile_op
1286 * {
1287 * tcp::socket& sock_;
1288 * int fd_;
1289 * Handler handler_;
1290 * off_t offset_;
1291 * std::size_t total_bytes_transferred_;
1292 *
1293 * // Function call operator meeting WriteHandler requirements.
1294 * // Used as the handler for the async_write_some operation.
1295 * void operator()(boost::system::error_code ec, std::size_t)
1296 * {
1297 * // Put the underlying socket into non-blocking mode.
1298 * if (!ec)
1299 * if (!sock_.native_non_blocking())
1300 * sock_.native_non_blocking(true, ec);
1301 *
1302 * if (!ec)
1303 * {
1304 * for (;;)
1305 * {
1306 * // Try the system call.
1307 * errno = 0;
1308 * int n = ::sendfile(sock_.native_handle(), fd_, &offset_, 65536);
1309 * ec = boost::system::error_code(n < 0 ? errno : 0,
1310 * boost::asio::error::get_system_category());
1311 * total_bytes_transferred_ += ec ? 0 : n;
1312 *
1313 * // Retry operation immediately if interrupted by signal.
1314 * if (ec == boost::asio::error::interrupted)
1315 * continue;
1316 *
1317 * // Check if we need to run the operation again.
1318 * if (ec == boost::asio::error::would_block
1319 * || ec == boost::asio::error::try_again)
1320 * {
1321 * // We have to wait for the socket to become ready again.
1322 * sock_.async_write_some(boost::asio::null_buffers(), *this);
1323 * return;
1324 * }
1325 *
1326 * if (ec || n == 0)
1327 * {
1328 * // An error occurred, or we have reached the end of the file.
1329 * // Either way we must exit the loop so we can call the handler.
1330 * break;
1331 * }
1332 *
1333 * // Loop around to try calling sendfile again.
1334 * }
1335 * }
1336 *
1337 * // Pass result back to user's handler.
1338 * handler_(ec, total_bytes_transferred_);
1339 * }
1340 * };
1341 *
1342 * template <typename Handler>
1343 * void async_sendfile(tcp::socket& sock, int fd, Handler h)
1344 * {
1345 * sendfile_op<Handler> op = { sock, fd, h, 0, 0 };
1346 * sock.async_write_some(boost::asio::null_buffers(), op);
1347 * } @endcode
1348 */
1349 boost::system::error_code native_non_blocking(
1350 bool mode, boost::system::error_code& ec)
1351 {
1352 return this->get_service().native_non_blocking(
1353 this->get_implementation(), mode, ec);
1354 }
1355
1356 /// Get the local endpoint of the socket.
1357 /**
1358 * This function is used to obtain the locally bound endpoint of the socket.
1359 *
1360 * @returns An object that represents the local endpoint of the socket.
1361 *
1362 * @throws boost::system::system_error Thrown on failure.
1363 *
1364 * @par Example
1365 * @code
1366 * boost::asio::ip::tcp::socket socket(io_service);
1367 * ...
1368 * boost::asio::ip::tcp::endpoint endpoint = socket.local_endpoint();
1369 * @endcode
1370 */
1371 endpoint_type local_endpoint() const
1372 {
1373 boost::system::error_code ec;
1374 endpoint_type ep = this->get_service().local_endpoint(
1375 this->get_implementation(), ec);
1376 boost::asio::detail::throw_error(ec, "local_endpoint");
1377 return ep;
1378 }
1379
1380 /// Get the local endpoint of the socket.
1381 /**
1382 * This function is used to obtain the locally bound endpoint of the socket.
1383 *
1384 * @param ec Set to indicate what error occurred, if any.
1385 *
1386 * @returns An object that represents the local endpoint of the socket.
1387 * Returns a default-constructed endpoint object if an error occurred.
1388 *
1389 * @par Example
1390 * @code
1391 * boost::asio::ip::tcp::socket socket(io_service);
1392 * ...
1393 * boost::system::error_code ec;
1394 * boost::asio::ip::tcp::endpoint endpoint = socket.local_endpoint(ec);
1395 * if (ec)
1396 * {
1397 * // An error occurred.
1398 * }
1399 * @endcode
1400 */
1401 endpoint_type local_endpoint(boost::system::error_code& ec) const
1402 {
1403 return this->get_service().local_endpoint(this->get_implementation(), ec);
1404 }
1405
1406 /// Get the remote endpoint of the socket.
1407 /**
1408 * This function is used to obtain the remote endpoint of the socket.
1409 *
1410 * @returns An object that represents the remote endpoint of the socket.
1411 *
1412 * @throws boost::system::system_error Thrown on failure.
1413 *
1414 * @par Example
1415 * @code
1416 * boost::asio::ip::tcp::socket socket(io_service);
1417 * ...
1418 * boost::asio::ip::tcp::endpoint endpoint = socket.remote_endpoint();
1419 * @endcode
1420 */
1421 endpoint_type remote_endpoint() const
1422 {
1423 boost::system::error_code ec;
1424 endpoint_type ep = this->get_service().remote_endpoint(
1425 this->get_implementation(), ec);
1426 boost::asio::detail::throw_error(ec, "remote_endpoint");
1427 return ep;
1428 }
1429
1430 /// Get the remote endpoint of the socket.
1431 /**
1432 * This function is used to obtain the remote endpoint of the socket.
1433 *
1434 * @param ec Set to indicate what error occurred, if any.
1435 *
1436 * @returns An object that represents the remote endpoint of the socket.
1437 * Returns a default-constructed endpoint object if an error occurred.
1438 *
1439 * @par Example
1440 * @code
1441 * boost::asio::ip::tcp::socket socket(io_service);
1442 * ...
1443 * boost::system::error_code ec;
1444 * boost::asio::ip::tcp::endpoint endpoint = socket.remote_endpoint(ec);
1445 * if (ec)
1446 * {
1447 * // An error occurred.
1448 * }
1449 * @endcode
1450 */
1451 endpoint_type remote_endpoint(boost::system::error_code& ec) const
1452 {
1453 return this->get_service().remote_endpoint(this->get_implementation(), ec);
1454 }
1455
1456 /// Disable sends or receives on the socket.
1457 /**
1458 * This function is used to disable send operations, receive operations, or
1459 * both.
1460 *
1461 * @param what Determines what types of operation will no longer be allowed.
1462 *
1463 * @throws boost::system::system_error Thrown on failure.
1464 *
1465 * @par Example
1466 * Shutting down the send side of the socket:
1467 * @code
1468 * boost::asio::ip::tcp::socket socket(io_service);
1469 * ...
1470 * socket.shutdown(boost::asio::ip::tcp::socket::shutdown_send);
1471 * @endcode
1472 */
1473 void shutdown(shutdown_type what)
1474 {
1475 boost::system::error_code ec;
1476 this->get_service().shutdown(this->get_implementation(), what, ec);
1477 boost::asio::detail::throw_error(ec, "shutdown");
1478 }
1479
1480 /// Disable sends or receives on the socket.
1481 /**
1482 * This function is used to disable send operations, receive operations, or
1483 * both.
1484 *
1485 * @param what Determines what types of operation will no longer be allowed.
1486 *
1487 * @param ec Set to indicate what error occurred, if any.
1488 *
1489 * @par Example
1490 * Shutting down the send side of the socket:
1491 * @code
1492 * boost::asio::ip::tcp::socket socket(io_service);
1493 * ...
1494 * boost::system::error_code ec;
1495 * socket.shutdown(boost::asio::ip::tcp::socket::shutdown_send, ec);
1496 * if (ec)
1497 * {
1498 * // An error occurred.
1499 * }
1500 * @endcode
1501 */
1502 boost::system::error_code shutdown(shutdown_type what,
1503 boost::system::error_code& ec)
1504 {
1505 return this->get_service().shutdown(this->get_implementation(), what, ec);
1506 }
1507
1508protected:
1509 /// Protected destructor to prevent deletion through this type.
1510 ~basic_socket()
1511 {
1512 }
1513};
1514
1515} // namespace asio
1516} // namespace boost
1517
1518#include <boost/asio/detail/pop_options.hpp>
1519
1520#endif // BOOST_ASIO_BASIC_SOCKET_HPP
1521

source code of boost/boost/asio/basic_socket.hpp