1 // System.Net.Sockets.Socket.cs
4 // Phillip Pearson (pp@myelin.co.nz)
5 // Dick Porter <dick@ximian.com>
6 // Gonzalo Paniagua Javier (gonzalo@ximian.com)
7 // Sridhar Kulkarni (sridharkulkarni@gmail.com)
8 // Brian Nickel (brian.nickel@gmail.com)
9 // Ludovic Henry (ludovic@xamarin.com)
11 // Copyright (C) 2001, 2002 Phillip Pearson and Ximian, Inc.
12 // http://www.myelin.co.nz
13 // (c) 2004-2011 Novell, Inc. (http://www.novell.com)
16 // Permission is hereby granted, free of charge, to any person obtaining
17 // a copy of this software and associated documentation files (the
18 // "Software"), to deal in the Software without restriction, including
19 // without limitation the rights to use, copy, modify, merge, publish,
20 // distribute, sublicense, and/or sell copies of the Software, and to
21 // permit persons to whom the Software is furnished to do so, subject to
22 // the following conditions:
24 // The above copyright notice and this permission notice shall be
25 // included in all copies or substantial portions of the Software.
27 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
28 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
29 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
30 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
31 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
32 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
33 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
38 using System.Collections;
39 using System.Collections.Generic;
40 using System.Runtime.CompilerServices;
41 using System.Runtime.InteropServices;
42 using System.Threading;
43 using System.Reflection;
45 using System.Net.Configuration;
48 using System.Net.NetworkInformation;
50 namespace System.Net.Sockets
52 public partial class Socket : IDisposable
54 const int SOCKET_CLOSED_CODE = 10004;
55 const string TIMEOUT_EXCEPTION_MSG = "A connection attempt failed because the connected party did not properly respond" +
56 "after a period of time, or established connection failed because connected host has failed to respond";
58 /* true if we called Close_internal */
66 AddressFamily addressFamily;
67 SocketType socketType;
68 ProtocolType protocolType;
70 /* the field "m_Handle" is looked up by name by the runtime */
71 internal SafeSocketHandle m_Handle;
74 * This EndPoint is used when creating new endpoints. Because
75 * there are many types of EndPoints possible,
76 * seed_endpoint.Create(addr) is used for creating new ones.
77 * As such, this value is set on Bind, SentTo, ReceiveFrom,
80 internal EndPoint seed_endpoint = null;
82 internal SemaphoreSlim ReadSem = new SemaphoreSlim (1, 1);
83 internal SemaphoreSlim WriteSem = new SemaphoreSlim (1, 1);
85 internal bool is_blocking = true;
86 internal bool is_bound;
88 /* When true, the socket was connected at the time of the last IO operation */
89 internal bool is_connected;
92 internal bool connect_in_progress;
97 public Socket (SocketInformation socketInformation)
99 this.is_listening = (socketInformation.Options & SocketInformationOptions.Listening) != 0;
100 this.is_connected = (socketInformation.Options & SocketInformationOptions.Connected) != 0;
101 this.is_blocking = (socketInformation.Options & SocketInformationOptions.NonBlocking) == 0;
102 this.useOverlappedIO = (socketInformation.Options & SocketInformationOptions.UseOnlyOverlappedIO) != 0;
104 var result = Mono.DataConverter.Unpack ("iiiil", socketInformation.ProtocolInformation, 0);
106 this.addressFamily = (AddressFamily) (int) result [0];
107 this.socketType = (SocketType) (int) result [1];
108 this.protocolType = (ProtocolType) (int) result [2];
109 this.is_bound = (ProtocolType) (int) result [3] != 0;
110 this.m_Handle = new SafeSocketHandle ((IntPtr) (long) result [4], true);
112 InitializeSockets ();
117 /* private constructor used by Accept, which already has a socket handle to use */
118 internal Socket(AddressFamily family, SocketType type, ProtocolType proto, SafeSocketHandle safe_handle)
120 this.addressFamily = family;
121 this.socketType = type;
122 this.protocolType = proto;
124 this.m_Handle = safe_handle;
125 this.is_connected = true;
127 InitializeSockets ();
130 void SocketDefaults ()
133 /* Need to test IPv6 further */
134 if (addressFamily == AddressFamily.InterNetwork
135 // || addressFamily == AddressFamily.InterNetworkV6
137 /* This is the default, but it probably has nasty side
138 * effects on Linux, as the socket option is kludged by
139 * turning on or off PMTU discovery... */
140 this.DontFragment = false;
141 if (protocolType == ProtocolType.Tcp)
142 this.NoDelay = false;
143 } else if (addressFamily == AddressFamily.InterNetworkV6) {
144 this.DualMode = true;
147 /* Microsoft sets these to 8192, but we are going to keep them
148 * both to the OS defaults as these have a big performance impact.
149 * on WebClient performance. */
150 // this.ReceiveBufferSize = 8192;
151 // this.SendBufferSize = 8192;
152 } catch (SocketException) {
156 /* Creates a new system socket, returning the handle */
157 [MethodImplAttribute(MethodImplOptions.InternalCall)]
158 extern IntPtr Socket_internal (AddressFamily family, SocketType type, ProtocolType proto, out int error);
164 public int Available {
166 ThrowIfDisposedAndClosed ();
169 ret = Available_internal (m_Handle, out error);
172 throw new SocketException (error);
178 static int Available_internal (SafeSocketHandle safeHandle, out int error)
180 bool release = false;
182 safeHandle.DangerousAddRef (ref release);
183 return Available_internal (safeHandle.DangerousGetHandle (), out error);
186 safeHandle.DangerousRelease ();
190 /* Returns the amount of data waiting to be read on socket */
191 [MethodImplAttribute(MethodImplOptions.InternalCall)]
192 extern static int Available_internal (IntPtr socket, out int error);
194 // FIXME: import from referencesource
195 public bool EnableBroadcast {
197 ThrowIfDisposedAndClosed ();
199 if (protocolType != ProtocolType.Udp)
200 throw new SocketException ((int) SocketError.ProtocolOption);
202 return ((int) GetSocketOption (SocketOptionLevel.Socket, SocketOptionName.Broadcast)) != 0;
205 ThrowIfDisposedAndClosed ();
207 if (protocolType != ProtocolType.Udp)
208 throw new SocketException ((int) SocketError.ProtocolOption);
210 SetSocketOption (SocketOptionLevel.Socket, SocketOptionName.Broadcast, value ? 1 : 0);
214 public bool IsBound {
220 // FIXME: import from referencesource
221 public bool MulticastLoopback {
223 ThrowIfDisposedAndClosed ();
225 /* Even though this option can be set for TCP sockets on Linux, throw
226 * this exception anyway to be compatible (the MSDN docs say
227 * "Setting this property on a Transmission Control Protocol (TCP)
228 * socket will have no effect." but the MS runtime throws the
230 if (protocolType == ProtocolType.Tcp)
231 throw new SocketException ((int)SocketError.ProtocolOption);
233 switch (addressFamily) {
234 case AddressFamily.InterNetwork:
235 return ((int) GetSocketOption (SocketOptionLevel.IP, SocketOptionName.MulticastLoopback)) != 0;
236 case AddressFamily.InterNetworkV6:
237 return ((int) GetSocketOption (SocketOptionLevel.IPv6, SocketOptionName.MulticastLoopback)) != 0;
239 throw new NotSupportedException ("This property is only valid for InterNetwork and InterNetworkV6 sockets");
243 ThrowIfDisposedAndClosed ();
245 /* Even though this option can be set for TCP sockets on Linux, throw
246 * this exception anyway to be compatible (the MSDN docs say
247 * "Setting this property on a Transmission Control Protocol (TCP)
248 * socket will have no effect." but the MS runtime throws the
250 if (protocolType == ProtocolType.Tcp)
251 throw new SocketException ((int)SocketError.ProtocolOption);
253 switch (addressFamily) {
254 case AddressFamily.InterNetwork:
255 SetSocketOption (SocketOptionLevel.IP, SocketOptionName.MulticastLoopback, value ? 1 : 0);
257 case AddressFamily.InterNetworkV6:
258 SetSocketOption (SocketOptionLevel.IPv6, SocketOptionName.MulticastLoopback, value ? 1 : 0);
261 throw new NotSupportedException ("This property is only valid for InterNetwork and InterNetworkV6 sockets");
266 // Wish: support non-IP endpoints.
267 public EndPoint LocalEndPoint {
269 ThrowIfDisposedAndClosed ();
271 /* If the seed EndPoint is null, Connect, Bind, etc has not yet
272 * been called. MS returns null in this case. */
273 if (seed_endpoint == null)
277 SocketAddress sa = LocalEndPoint_internal (m_Handle, (int) addressFamily, out error);
280 throw new SocketException (error);
282 return seed_endpoint.Create (sa);
286 static SocketAddress LocalEndPoint_internal (SafeSocketHandle safeHandle, int family, out int error)
288 bool release = false;
290 safeHandle.DangerousAddRef (ref release);
291 return LocalEndPoint_internal (safeHandle.DangerousGetHandle (), family, out error);
294 safeHandle.DangerousRelease ();
298 /* Returns the local endpoint details in addr and port */
299 [MethodImplAttribute(MethodImplOptions.InternalCall)]
300 extern static SocketAddress LocalEndPoint_internal (IntPtr socket, int family, out int error);
302 public bool Blocking {
303 get { return is_blocking; }
305 ThrowIfDisposedAndClosed ();
308 Blocking_internal (m_Handle, value, out error);
311 throw new SocketException (error);
317 static void Blocking_internal (SafeSocketHandle safeHandle, bool block, out int error)
319 bool release = false;
321 safeHandle.DangerousAddRef (ref release);
322 Blocking_internal (safeHandle.DangerousGetHandle (), block, out error);
325 safeHandle.DangerousRelease ();
329 [MethodImplAttribute(MethodImplOptions.InternalCall)]
330 internal extern static void Blocking_internal(IntPtr socket, bool block, out int error);
332 public bool Connected {
333 get { return is_connected; }
334 internal set { is_connected = value; }
337 // FIXME: import from referencesource
338 public bool NoDelay {
340 ThrowIfDisposedAndClosed ();
343 return ((int) GetSocketOption (SocketOptionLevel.Tcp, SocketOptionName.NoDelay)) != 0;
347 ThrowIfDisposedAndClosed ();
349 SetSocketOption (SocketOptionLevel.Tcp, SocketOptionName.NoDelay, value ? 1 : 0);
353 public EndPoint RemoteEndPoint {
355 ThrowIfDisposedAndClosed ();
357 /* If the seed EndPoint is null, Connect, Bind, etc has
358 * not yet been called. MS returns null in this case. */
359 if (!is_connected || seed_endpoint == null)
363 SocketAddress sa = RemoteEndPoint_internal (m_Handle, (int) addressFamily, out error);
366 throw new SocketException (error);
368 return seed_endpoint.Create (sa);
372 static SocketAddress RemoteEndPoint_internal (SafeSocketHandle safeHandle, int family, out int error)
374 bool release = false;
376 safeHandle.DangerousAddRef (ref release);
377 return RemoteEndPoint_internal (safeHandle.DangerousGetHandle (), family, out error);
380 safeHandle.DangerousRelease ();
384 /* Returns the remote endpoint details in addr and port */
385 [MethodImplAttribute(MethodImplOptions.InternalCall)]
386 extern static SocketAddress RemoteEndPoint_internal (IntPtr socket, int family, out int error);
392 public static void Select (IList checkRead, IList checkWrite, IList checkError, int microSeconds)
394 var list = new List<Socket> ();
395 AddSockets (list, checkRead, "checkRead");
396 AddSockets (list, checkWrite, "checkWrite");
397 AddSockets (list, checkError, "checkError");
400 throw new ArgumentNullException ("checkRead, checkWrite, checkError", "All the lists are null or empty.");
402 /* The 'sockets' array contains:
403 * - READ socket 0-n, null,
404 * - WRITE socket 0-n, null,
405 * - ERROR socket 0-n, null */
406 Socket [] sockets = list.ToArray ();
409 Select_internal (ref sockets, microSeconds, out error);
412 throw new SocketException (error);
414 if (sockets == null) {
415 if (checkRead != null)
417 if (checkWrite != null)
419 if (checkError != null)
425 int count = sockets.Length;
426 IList currentList = checkRead;
428 for (int i = 0; i < count; i++) {
429 Socket sock = sockets [i];
430 if (sock == null) { // separator
431 if (currentList != null) {
432 // Remove non-signaled sockets after the current one
433 int to_remove = currentList.Count - currentIdx;
434 for (int k = 0; k < to_remove; k++)
435 currentList.RemoveAt (currentIdx);
437 currentList = (mode == 0) ? checkWrite : checkError;
443 if (mode == 1 && currentList == checkWrite && !sock.is_connected) {
444 if ((int) sock.GetSocketOption (SocketOptionLevel.Socket, SocketOptionName.Error) == 0)
445 sock.is_connected = true;
448 /* Remove non-signaled sockets before the current one */
449 while (((Socket) currentList [currentIdx]) != sock)
450 currentList.RemoveAt (currentIdx);
456 static void AddSockets (List<Socket> sockets, IList list, string name)
459 foreach (Socket sock in list) {
460 if (sock == null) // MS throws a NullRef
461 throw new ArgumentNullException (name, "Contains a null element");
469 [MethodImplAttribute(MethodImplOptions.InternalCall)]
470 extern static void Select_internal (ref Socket [] sockets, int microSeconds, out int error);
476 public bool Poll (int microSeconds, SelectMode mode)
478 ThrowIfDisposedAndClosed ();
480 if (mode != SelectMode.SelectRead && mode != SelectMode.SelectWrite && mode != SelectMode.SelectError)
481 throw new NotSupportedException ("'mode' parameter is not valid.");
484 bool result = Poll_internal (m_Handle, mode, microSeconds, out error);
487 throw new SocketException (error);
489 if (mode == SelectMode.SelectWrite && result && !is_connected) {
490 /* Update the is_connected state; for non-blocking Connect()
491 * this is when we can find out that the connect succeeded. */
492 if ((int) GetSocketOption (SocketOptionLevel.Socket, SocketOptionName.Error) == 0)
499 static bool Poll_internal (SafeSocketHandle safeHandle, SelectMode mode, int timeout, out int error)
501 bool release = false;
503 safeHandle.DangerousAddRef (ref release);
504 return Poll_internal (safeHandle.DangerousGetHandle (), mode, timeout, out error);
507 safeHandle.DangerousRelease ();
511 [MethodImplAttribute(MethodImplOptions.InternalCall)]
512 extern static bool Poll_internal (IntPtr socket, SelectMode mode, int timeout, out int error);
518 public Socket Accept()
520 ThrowIfDisposedAndClosed ();
523 SafeSocketHandle safe_handle = Accept_internal (this.m_Handle, out error, is_blocking);
527 error = SOCKET_CLOSED_CODE;
528 throw new SocketException(error);
531 Socket accepted = new Socket (this.AddressFamily, this.SocketType, this.ProtocolType, safe_handle) {
532 seed_endpoint = this.seed_endpoint,
533 Blocking = this.Blocking,
539 internal void Accept (Socket acceptSocket)
541 ThrowIfDisposedAndClosed ();
544 SafeSocketHandle safe_handle = Accept_internal (this.m_Handle, out error, is_blocking);
548 error = SOCKET_CLOSED_CODE;
549 throw new SocketException (error);
552 acceptSocket.addressFamily = this.AddressFamily;
553 acceptSocket.socketType = this.SocketType;
554 acceptSocket.protocolType = this.ProtocolType;
555 acceptSocket.m_Handle = safe_handle;
556 acceptSocket.is_connected = true;
557 acceptSocket.seed_endpoint = this.seed_endpoint;
558 acceptSocket.Blocking = this.Blocking;
560 // FIXME: figure out what if anything else needs to be reset
563 public bool AcceptAsync (SocketAsyncEventArgs e)
565 // NO check is made whether e != null in MS.NET (NRE is thrown in such case)
567 ThrowIfDisposedAndClosed ();
570 throw new InvalidOperationException ("You must call the Bind method before performing this operation.");
572 throw new InvalidOperationException ("You must call the Listen method before performing this operation.");
573 if (e.BufferList != null)
574 throw new ArgumentException ("Multiple buffers cannot be used with this method.");
576 throw new ArgumentOutOfRangeException ("e.Count");
578 Socket acceptSocket = e.AcceptSocket;
579 if (acceptSocket != null) {
580 if (acceptSocket.is_bound || acceptSocket.is_connected)
581 throw new InvalidOperationException ("AcceptSocket: The socket must not be bound or connected.");
584 InitSocketAsyncEventArgs (e, AcceptAsyncCallback, e, SocketOperation.Accept);
586 QueueIOSelectorJob (ReadSem, e.socket_async_result.Handle, new IOSelectorJob (IOOperation.Read, BeginAcceptCallback, e.socket_async_result));
591 static AsyncCallback AcceptAsyncCallback = new AsyncCallback (ares => {
592 SocketAsyncEventArgs e = (SocketAsyncEventArgs) ((SocketAsyncResult) ares).AsyncState;
594 if (Interlocked.Exchange (ref e.in_progress, 0) != 1)
595 throw new InvalidOperationException ("No operation in progress");
598 e.AcceptSocket = e.current_socket.EndAccept (ares);
599 } catch (SocketException ex) {
600 e.SocketError = ex.SocketErrorCode;
601 } catch (ObjectDisposedException) {
602 e.SocketError = SocketError.OperationAborted;
604 if (e.AcceptSocket == null)
605 e.AcceptSocket = new Socket (e.current_socket.AddressFamily, e.current_socket.SocketType, e.current_socket.ProtocolType, null);
610 public IAsyncResult BeginAccept(AsyncCallback callback, object state)
612 ThrowIfDisposedAndClosed ();
614 if (!is_bound || !is_listening)
615 throw new InvalidOperationException ();
617 SocketAsyncResult sockares = new SocketAsyncResult (this, callback, state, SocketOperation.Accept);
619 QueueIOSelectorJob (ReadSem, sockares.Handle, new IOSelectorJob (IOOperation.Read, BeginAcceptCallback, sockares));
624 static IOAsyncCallback BeginAcceptCallback = new IOAsyncCallback (ares => {
625 SocketAsyncResult sockares = (SocketAsyncResult) ares;
626 Socket acc_socket = null;
628 if (sockares.AcceptSocket == null) {
629 acc_socket = sockares.socket.Accept ();
631 acc_socket = sockares.AcceptSocket;
632 sockares.socket.Accept (acc_socket);
635 } catch (Exception e) {
636 sockares.Complete (e);
639 sockares.Complete (acc_socket);
642 public IAsyncResult BeginAccept (Socket acceptSocket, int receiveSize, AsyncCallback callback, object state)
644 ThrowIfDisposedAndClosed ();
647 throw new ArgumentOutOfRangeException ("receiveSize", "receiveSize is less than zero");
649 if (acceptSocket != null) {
650 ThrowIfDisposedAndClosed (acceptSocket);
652 if (acceptSocket.IsBound)
653 throw new InvalidOperationException ();
655 /* For some reason the MS runtime
656 * barfs if the new socket is not TCP,
657 * even though it's just about to blow
658 * away all those parameters
660 if (acceptSocket.ProtocolType != ProtocolType.Tcp)
661 throw new SocketException ((int)SocketError.InvalidArgument);
664 SocketAsyncResult sockares = new SocketAsyncResult (this, callback, state, SocketOperation.AcceptReceive) {
665 Buffer = new byte [receiveSize],
668 SockFlags = SocketFlags.None,
669 AcceptSocket = acceptSocket,
672 QueueIOSelectorJob (ReadSem, sockares.Handle, new IOSelectorJob (IOOperation.Read, BeginAcceptReceiveCallback, sockares));
677 static IOAsyncCallback BeginAcceptReceiveCallback = new IOAsyncCallback (ares => {
678 SocketAsyncResult sockares = (SocketAsyncResult) ares;
679 Socket acc_socket = null;
682 if (sockares.AcceptSocket == null) {
683 acc_socket = sockares.socket.Accept ();
685 acc_socket = sockares.AcceptSocket;
686 sockares.socket.Accept (acc_socket);
688 } catch (Exception e) {
689 sockares.Complete (e);
693 /* It seems the MS runtime special-cases 0-length requested receive data. See bug 464201. */
695 if (sockares.Size > 0) {
698 total = acc_socket.Receive (sockares.Buffer, sockares.Offset, sockares.Size, sockares.SockFlags, out error);
700 sockares.Complete (new SocketException ((int) error));
703 } catch (Exception e) {
704 sockares.Complete (e);
709 sockares.Complete (acc_socket, total);
712 public Socket EndAccept (IAsyncResult asyncResult)
716 return EndAccept (out buffer, out bytes, asyncResult);
719 public Socket EndAccept (out byte[] buffer, out int bytesTransferred, IAsyncResult asyncResult)
721 ThrowIfDisposedAndClosed ();
723 SocketAsyncResult sockares = ValidateEndIAsyncResult (asyncResult, "EndAccept", "asyncResult");
725 if (!sockares.IsCompleted)
726 sockares.AsyncWaitHandle.WaitOne ();
728 sockares.CheckIfThrowDelayedException ();
730 buffer = sockares.Buffer;
731 bytesTransferred = sockares.Total;
733 return sockares.AcceptedSocket;
736 static SafeSocketHandle Accept_internal (SafeSocketHandle safeHandle, out int error, bool blocking)
739 safeHandle.RegisterForBlockingSyscall ();
740 var ret = Accept_internal (safeHandle.DangerousGetHandle (), out error, blocking);
741 return new SafeSocketHandle (ret, true);
743 safeHandle.UnRegisterForBlockingSyscall ();
747 /* Creates a new system socket, returning the handle */
748 [MethodImplAttribute(MethodImplOptions.InternalCall)]
749 extern static IntPtr Accept_internal (IntPtr sock, out int error, bool blocking);
755 public void Bind (EndPoint localEP)
757 #if FEATURE_NO_BSD_SOCKETS
758 throw new PlatformNotSupportedException ("System.Net.Sockets.Socket:Bind is not supported on this platform.");
760 ThrowIfDisposedAndClosed ();
763 throw new ArgumentNullException("localEP");
765 var ipEndPoint = localEP as IPEndPoint;
766 if (ipEndPoint != null) {
767 localEP = RemapIPEndPoint (ipEndPoint);
771 Bind_internal (m_Handle, localEP.Serialize(), out error);
774 throw new SocketException (error);
778 seed_endpoint = localEP;
779 #endif // FEATURE_NO_BSD_SOCKETS
782 private static void Bind_internal (SafeSocketHandle safeHandle, SocketAddress sa, out int error)
784 bool release = false;
786 safeHandle.DangerousAddRef (ref release);
787 Bind_internal (safeHandle.DangerousGetHandle (), sa, out error);
790 safeHandle.DangerousRelease ();
794 // Creates a new system socket, returning the handle
795 [MethodImplAttribute(MethodImplOptions.InternalCall)]
796 private extern static void Bind_internal(IntPtr sock, SocketAddress sa, out int error);
802 public void Listen (int backlog)
804 ThrowIfDisposedAndClosed ();
807 throw new SocketException ((int) SocketError.InvalidArgument);
810 Listen_internal(m_Handle, backlog, out error);
813 throw new SocketException (error);
818 static void Listen_internal (SafeSocketHandle safeHandle, int backlog, out int error)
820 bool release = false;
822 safeHandle.DangerousAddRef (ref release);
823 Listen_internal (safeHandle.DangerousGetHandle (), backlog, out error);
826 safeHandle.DangerousRelease ();
830 [MethodImplAttribute(MethodImplOptions.InternalCall)]
831 extern static void Listen_internal (IntPtr sock, int backlog, out int error);
837 public void Connect (IPAddress address, int port)
839 Connect (new IPEndPoint (address, port));
842 public void Connect (string host, int port)
844 Connect (Dns.GetHostAddresses (host), port);
847 public void Connect (EndPoint remoteEP)
849 ThrowIfDisposedAndClosed ();
851 if (remoteEP == null)
852 throw new ArgumentNullException ("remoteEP");
854 IPEndPoint ep = remoteEP as IPEndPoint;
855 /* Dgram uses Any to 'disconnect' */
856 if (ep != null && socketType != SocketType.Dgram) {
857 if (ep.Address.Equals (IPAddress.Any) || ep.Address.Equals (IPAddress.IPv6Any))
858 throw new SocketException ((int) SocketError.AddressNotAvailable);
862 throw new InvalidOperationException ();
865 remoteEP = RemapIPEndPoint (ep);
868 SocketAddress serial = remoteEP.Serialize ();
871 Connect_internal (m_Handle, serial, out error, is_blocking);
873 if (error == 0 || error == 10035)
874 seed_endpoint = remoteEP; // Keep the ep around for non-blocking sockets
878 error = SOCKET_CLOSED_CODE;
879 throw new SocketException (error);
882 is_connected = !(socketType == SocketType.Dgram && ep != null && (ep.Address.Equals (IPAddress.Any) || ep.Address.Equals (IPAddress.IPv6Any)));
886 public bool ConnectAsync (SocketAsyncEventArgs e)
888 // NO check is made whether e != null in MS.NET (NRE is thrown in such case)
890 ThrowIfDisposedAndClosed ();
893 throw new InvalidOperationException ("You may not perform this operation after calling the Listen method.");
894 if (e.RemoteEndPoint == null)
895 throw new ArgumentNullException ("remoteEP");
897 InitSocketAsyncEventArgs (e, null, e, SocketOperation.Connect);
900 IPAddress [] addresses;
901 SocketAsyncResult ares;
903 if (!GetCheckedIPs (e, out addresses)) {
904 //NOTE: DualMode may cause Socket's RemoteEndpoint to differ in AddressFamily from the
905 // SocketAsyncEventArgs, but the SocketAsyncEventArgs itself is not changed
906 ares = (SocketAsyncResult) BeginConnect (e.RemoteEndPoint, ConnectAsyncCallback, e);
908 DnsEndPoint dep = (DnsEndPoint)e.RemoteEndPoint;
909 ares = (SocketAsyncResult) BeginConnect (addresses, dep.Port, ConnectAsyncCallback, e);
912 if (ares.IsCompleted && ares.CompletedSynchronously) {
913 ares.CheckIfThrowDelayedException ();
916 } catch (Exception exc) {
917 e.socket_async_result.Complete (exc, true);
924 public static void CancelConnectAsync (SocketAsyncEventArgs e)
927 throw new ArgumentNullException("e");
929 if (e.in_progress != 0 && e.LastOperation == SocketAsyncOperation.Connect)
930 e.current_socket.Close();
933 static AsyncCallback ConnectAsyncCallback = new AsyncCallback (ares => {
934 SocketAsyncEventArgs e = (SocketAsyncEventArgs) ((SocketAsyncResult) ares).AsyncState;
936 if (Interlocked.Exchange (ref e.in_progress, 0) != 1)
937 throw new InvalidOperationException ("No operation in progress");
940 e.current_socket.EndConnect (ares);
941 } catch (SocketException se) {
942 e.SocketError = se.SocketErrorCode;
943 } catch (ObjectDisposedException) {
944 e.SocketError = SocketError.OperationAborted;
950 public IAsyncResult BeginConnect (string host, int port, AsyncCallback requestCallback, object state)
952 ThrowIfDisposedAndClosed ();
955 throw new ArgumentNullException ("host");
956 if (addressFamily != AddressFamily.InterNetwork && addressFamily != AddressFamily.InterNetworkV6)
957 throw new NotSupportedException ("This method is valid only for sockets in the InterNetwork and InterNetworkV6 families");
958 if (port <= 0 || port > 65535)
959 throw new ArgumentOutOfRangeException ("port", "Must be > 0 and < 65536");
961 throw new InvalidOperationException ();
963 return BeginConnect (Dns.GetHostAddresses (host), port, requestCallback, state);
966 public IAsyncResult BeginConnect (EndPoint remoteEP, AsyncCallback callback, object state)
968 ThrowIfDisposedAndClosed ();
970 if (remoteEP == null)
971 throw new ArgumentNullException ("remoteEP");
973 throw new InvalidOperationException ();
975 SocketAsyncResult sockares = new SocketAsyncResult (this, callback, state, SocketOperation.Connect) {
979 // Bug #75154: Connect() should not succeed for .Any addresses.
980 if (remoteEP is IPEndPoint) {
981 IPEndPoint ep = (IPEndPoint) remoteEP;
982 if (ep.Address.Equals (IPAddress.Any) || ep.Address.Equals (IPAddress.IPv6Any)) {
983 sockares.Complete (new SocketException ((int) SocketError.AddressNotAvailable), true);
987 sockares.EndPoint = remoteEP = RemapIPEndPoint (ep);
992 if (connect_in_progress) {
993 // This could happen when multiple IPs are used
994 // Calling connect() again will reset the connection attempt and cause
995 // an error. Better to just close the socket and move on.
996 connect_in_progress = false;
998 m_Handle = new SafeSocketHandle (Socket_internal (addressFamily, socketType, protocolType, out error), true);
1000 throw new SocketException (error);
1003 bool blk = is_blocking;
1006 Connect_internal (m_Handle, remoteEP.Serialize (), out error, false);
1012 is_connected = true;
1014 sockares.Complete (true);
1018 if (error != (int) SocketError.InProgress && error != (int) SocketError.WouldBlock) {
1020 is_connected = false;
1022 sockares.Complete (new SocketException (error), true);
1027 is_connected = false;
1029 connect_in_progress = true;
1031 IOSelector.Add (sockares.Handle, new IOSelectorJob (IOOperation.Write, BeginConnectCallback, sockares));
1036 public IAsyncResult BeginConnect (IPAddress[] addresses, int port, AsyncCallback requestCallback, object state)
1038 ThrowIfDisposedAndClosed ();
1040 if (addresses == null)
1041 throw new ArgumentNullException ("addresses");
1042 if (addresses.Length == 0)
1043 throw new ArgumentException ("Empty addresses list");
1044 if (this.AddressFamily != AddressFamily.InterNetwork && this.AddressFamily != AddressFamily.InterNetworkV6)
1045 throw new NotSupportedException ("This method is only valid for addresses in the InterNetwork or InterNetworkV6 families");
1046 if (port <= 0 || port > 65535)
1047 throw new ArgumentOutOfRangeException ("port", "Must be > 0 and < 65536");
1049 throw new InvalidOperationException ();
1051 SocketAsyncResult sockares = new SocketAsyncResult (this, requestCallback, state, SocketOperation.Connect) {
1052 Addresses = addresses,
1056 is_connected = false;
1058 return BeginMConnect (sockares);
1061 internal IAsyncResult BeginMConnect (SocketAsyncResult sockares)
1063 SocketAsyncResult ares = null;
1064 Exception exc = null;
1065 AsyncCallback callback;
1067 for (int i = sockares.CurrentAddress; i < sockares.Addresses.Length; i++) {
1069 sockares.CurrentAddress++;
1071 ares = (SocketAsyncResult) BeginConnect (new IPEndPoint (sockares.Addresses [i], sockares.Port), null, sockares);
1072 if (ares.IsCompleted && ares.CompletedSynchronously) {
1073 ares.CheckIfThrowDelayedException ();
1075 callback = ares.AsyncCallback;
1076 if (callback != null)
1077 ThreadPool.UnsafeQueueUserWorkItem (_ => callback (ares), null);
1081 } catch (Exception e) {
1093 static IOAsyncCallback BeginConnectCallback = new IOAsyncCallback (ares => {
1094 SocketAsyncResult sockares = (SocketAsyncResult) ares;
1096 if (sockares.EndPoint == null) {
1097 sockares.Complete (new SocketException ((int)SocketError.AddressNotAvailable));
1101 SocketAsyncResult mconnect = sockares.AsyncState as SocketAsyncResult;
1102 bool is_mconnect = mconnect != null && mconnect.Addresses != null;
1105 EndPoint ep = sockares.EndPoint;
1106 int error_code = (int) sockares.socket.GetSocketOption (SocketOptionLevel.Socket, SocketOptionName.Error);
1108 if (error_code == 0) {
1110 sockares = mconnect;
1112 sockares.socket.seed_endpoint = ep;
1113 sockares.socket.is_connected = true;
1114 sockares.socket.is_bound = true;
1115 sockares.socket.connect_in_progress = false;
1117 sockares.Complete ();
1122 sockares.socket.connect_in_progress = false;
1123 sockares.Complete (new SocketException (error_code));
1127 if (mconnect.CurrentAddress >= mconnect.Addresses.Length) {
1128 mconnect.Complete (new SocketException (error_code));
1132 mconnect.socket.BeginMConnect (mconnect);
1133 } catch (Exception e) {
1134 sockares.socket.connect_in_progress = false;
1137 sockares = mconnect;
1139 sockares.Complete (e);
1144 public void EndConnect (IAsyncResult asyncResult)
1146 ThrowIfDisposedAndClosed ();
1148 SocketAsyncResult sockares = ValidateEndIAsyncResult (asyncResult, "EndConnect", "asyncResult");
1150 if (!sockares.IsCompleted)
1151 sockares.AsyncWaitHandle.WaitOne();
1153 sockares.CheckIfThrowDelayedException();
1156 static void Connect_internal (SafeSocketHandle safeHandle, SocketAddress sa, out int error, bool blocking)
1159 safeHandle.RegisterForBlockingSyscall ();
1160 Connect_internal (safeHandle.DangerousGetHandle (), sa, out error, blocking);
1162 safeHandle.UnRegisterForBlockingSyscall ();
1166 /* Connects to the remote address */
1167 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1168 extern static void Connect_internal(IntPtr sock, SocketAddress sa, out int error, bool blocking);
1171 * - false when it is ok to use RemoteEndPoint
1172 * - true when addresses must be used (and addresses could be null/empty) */
1173 bool GetCheckedIPs (SocketAsyncEventArgs e, out IPAddress [] addresses)
1177 // Connect to the first address that match the host name, like:
1178 // http://blogs.msdn.com/ncl/archive/2009/07/20/new-ncl-features-in-net-4-0-beta-2.aspx
1179 // while skipping entries that do not match the address family
1180 DnsEndPoint dep = e.RemoteEndPoint as DnsEndPoint;
1182 addresses = Dns.GetHostAddresses (dep.Host);
1185 e.ConnectByNameError = null;
1194 /* According to the docs, the MS runtime will throw PlatformNotSupportedException
1195 * if the platform is newer than w2k. We should be able to cope... */
1196 public void Disconnect (bool reuseSocket)
1198 ThrowIfDisposedAndClosed ();
1201 Disconnect_internal (m_Handle, reuseSocket, out error);
1205 /* ERROR_NOT_SUPPORTED */
1206 throw new PlatformNotSupportedException ();
1208 throw new SocketException (error);
1212 is_connected = false;
1214 /* Do managed housekeeping here... */
1218 public bool DisconnectAsync (SocketAsyncEventArgs e)
1220 // NO check is made whether e != null in MS.NET (NRE is thrown in such case)
1222 ThrowIfDisposedAndClosed ();
1224 InitSocketAsyncEventArgs (e, DisconnectAsyncCallback, e, SocketOperation.Disconnect);
1226 IOSelector.Add (e.socket_async_result.Handle, new IOSelectorJob (IOOperation.Write, BeginDisconnectCallback, e.socket_async_result));
1231 static AsyncCallback DisconnectAsyncCallback = new AsyncCallback (ares => {
1232 SocketAsyncEventArgs e = (SocketAsyncEventArgs) ((SocketAsyncResult) ares).AsyncState;
1234 if (Interlocked.Exchange (ref e.in_progress, 0) != 1)
1235 throw new InvalidOperationException ("No operation in progress");
1238 e.current_socket.EndDisconnect (ares);
1239 } catch (SocketException ex) {
1240 e.SocketError = ex.SocketErrorCode;
1241 } catch (ObjectDisposedException) {
1242 e.SocketError = SocketError.OperationAborted;
1248 public IAsyncResult BeginDisconnect (bool reuseSocket, AsyncCallback callback, object state)
1250 ThrowIfDisposedAndClosed ();
1252 SocketAsyncResult sockares = new SocketAsyncResult (this, callback, state, SocketOperation.Disconnect) {
1253 ReuseSocket = reuseSocket,
1256 IOSelector.Add (sockares.Handle, new IOSelectorJob (IOOperation.Write, BeginDisconnectCallback, sockares));
1261 static IOAsyncCallback BeginDisconnectCallback = new IOAsyncCallback (ares => {
1262 SocketAsyncResult sockares = (SocketAsyncResult) ares;
1265 sockares.socket.Disconnect (sockares.ReuseSocket);
1266 } catch (Exception e) {
1267 sockares.Complete (e);
1271 sockares.Complete ();
1274 public void EndDisconnect (IAsyncResult asyncResult)
1276 ThrowIfDisposedAndClosed ();
1278 SocketAsyncResult sockares = ValidateEndIAsyncResult (asyncResult, "EndDisconnect", "asyncResult");
1280 if (!sockares.IsCompleted)
1281 sockares.AsyncWaitHandle.WaitOne ();
1283 sockares.CheckIfThrowDelayedException ();
1286 static void Disconnect_internal (SafeSocketHandle safeHandle, bool reuse, out int error)
1288 bool release = false;
1290 safeHandle.DangerousAddRef (ref release);
1291 Disconnect_internal (safeHandle.DangerousGetHandle (), reuse, out error);
1294 safeHandle.DangerousRelease ();
1298 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1299 extern static void Disconnect_internal (IntPtr sock, bool reuse, out int error);
1305 public int Receive (byte [] buffer, int offset, int size, SocketFlags socketFlags, out SocketError errorCode)
1307 ThrowIfDisposedAndClosed ();
1308 ThrowIfBufferNull (buffer);
1309 ThrowIfBufferOutOfRange (buffer, offset, size);
1312 int ret = Receive_internal (m_Handle, buffer, offset, size, socketFlags, out nativeError, is_blocking);
1314 errorCode = (SocketError) nativeError;
1315 if (errorCode != SocketError.Success && errorCode != SocketError.WouldBlock && errorCode != SocketError.InProgress) {
1316 is_connected = false;
1319 is_connected = true;
1325 [CLSCompliant (false)]
1326 public int Receive (IList<ArraySegment<byte>> buffers, SocketFlags socketFlags, out SocketError errorCode)
1328 ThrowIfDisposedAndClosed ();
1330 if (buffers == null || buffers.Count == 0)
1331 throw new ArgumentNullException ("buffers");
1333 int numsegments = buffers.Count;
1337 /* Only example I can find of sending a byte array reference directly into an internal
1338 * call is in System.Runtime.Remoting/System.Runtime.Remoting.Channels.Ipc.Win32/NamedPipeSocket.cs,
1339 * so taking a lead from that... */
1340 WSABUF[] bufarray = new WSABUF[numsegments];
1341 GCHandle[] gch = new GCHandle[numsegments];
1343 for (int i = 0; i < numsegments; i++) {
1344 ArraySegment<byte> segment = buffers[i];
1346 if (segment.Offset < 0 || segment.Count < 0 || segment.Count > segment.Array.Length - segment.Offset)
1347 throw new ArgumentOutOfRangeException ("segment");
1349 gch[i] = GCHandle.Alloc (segment.Array, GCHandleType.Pinned);
1350 bufarray[i].len = segment.Count;
1351 bufarray[i].buf = Marshal.UnsafeAddrOfPinnedArrayElement (segment.Array, segment.Offset);
1355 ret = Receive_internal (m_Handle, bufarray, socketFlags, out nativeError, is_blocking);
1357 for (int i = 0; i < numsegments; i++) {
1358 if (gch[i].IsAllocated)
1363 errorCode = (SocketError) nativeError;
1368 public bool ReceiveAsync (SocketAsyncEventArgs e)
1370 // NO check is made whether e != null in MS.NET (NRE is thrown in such case)
1372 ThrowIfDisposedAndClosed ();
1374 // LAME SPEC: the ArgumentException is never thrown, instead an NRE is
1375 // thrown when e.Buffer and e.BufferList are null (works fine when one is
1376 // set to a valid object)
1377 if (e.Buffer == null && e.BufferList == null)
1378 throw new NullReferenceException ("Either e.Buffer or e.BufferList must be valid buffers.");
1380 if (e.Buffer == null) {
1381 InitSocketAsyncEventArgs (e, ReceiveAsyncCallback, e, SocketOperation.ReceiveGeneric);
1383 e.socket_async_result.Buffers = e.BufferList;
1385 QueueIOSelectorJob (ReadSem, e.socket_async_result.Handle, new IOSelectorJob (IOOperation.Read, BeginReceiveGenericCallback, e.socket_async_result));
1387 InitSocketAsyncEventArgs (e, ReceiveAsyncCallback, e, SocketOperation.Receive);
1389 e.socket_async_result.Buffer = e.Buffer;
1390 e.socket_async_result.Offset = e.Offset;
1391 e.socket_async_result.Size = e.Count;
1393 QueueIOSelectorJob (ReadSem, e.socket_async_result.Handle, new IOSelectorJob (IOOperation.Read, BeginReceiveCallback, e.socket_async_result));
1399 static AsyncCallback ReceiveAsyncCallback = new AsyncCallback (ares => {
1400 SocketAsyncEventArgs e = (SocketAsyncEventArgs) ((SocketAsyncResult) ares).AsyncState;
1402 if (Interlocked.Exchange (ref e.in_progress, 0) != 1)
1403 throw new InvalidOperationException ("No operation in progress");
1406 e.BytesTransferred = e.current_socket.EndReceive (ares);
1407 } catch (SocketException se){
1408 e.SocketError = se.SocketErrorCode;
1409 } catch (ObjectDisposedException) {
1410 e.SocketError = SocketError.OperationAborted;
1416 public IAsyncResult BeginReceive (byte[] buffer, int offset, int size, SocketFlags socketFlags, out SocketError errorCode, AsyncCallback callback, object state)
1418 ThrowIfDisposedAndClosed ();
1419 ThrowIfBufferNull (buffer);
1420 ThrowIfBufferOutOfRange (buffer, offset, size);
1422 /* As far as I can tell from the docs and from experimentation, a pointer to the
1423 * SocketError parameter is not supposed to be saved for the async parts. And as we don't
1424 * set any socket errors in the setup code, we just have to set it to Success. */
1425 errorCode = SocketError.Success;
1427 SocketAsyncResult sockares = new SocketAsyncResult (this, callback, state, SocketOperation.Receive) {
1431 SockFlags = socketFlags,
1434 QueueIOSelectorJob (ReadSem, sockares.Handle, new IOSelectorJob (IOOperation.Read, BeginReceiveCallback, sockares));
1439 static IOAsyncCallback BeginReceiveCallback = new IOAsyncCallback (ares => {
1440 SocketAsyncResult sockares = (SocketAsyncResult) ares;
1444 total = Receive_internal (sockares.socket.m_Handle, sockares.Buffer, sockares.Offset, sockares.Size, sockares.SockFlags, out sockares.error, sockares.socket.is_blocking);
1445 } catch (Exception e) {
1446 sockares.Complete (e);
1450 sockares.Complete (total);
1453 [CLSCompliant (false)]
1454 public IAsyncResult BeginReceive (IList<ArraySegment<byte>> buffers, SocketFlags socketFlags, out SocketError errorCode, AsyncCallback callback, object state)
1456 ThrowIfDisposedAndClosed ();
1458 if (buffers == null)
1459 throw new ArgumentNullException ("buffers");
1461 /* I assume the same SocketError semantics as above */
1462 errorCode = SocketError.Success;
1464 SocketAsyncResult sockares = new SocketAsyncResult (this, callback, state, SocketOperation.ReceiveGeneric) {
1466 SockFlags = socketFlags,
1469 QueueIOSelectorJob (ReadSem, sockares.Handle, new IOSelectorJob (IOOperation.Read, BeginReceiveGenericCallback, sockares));
1474 static IOAsyncCallback BeginReceiveGenericCallback = new IOAsyncCallback (ares => {
1475 SocketAsyncResult sockares = (SocketAsyncResult) ares;
1479 total = sockares.socket.Receive (sockares.Buffers, sockares.SockFlags);
1480 } catch (Exception e) {
1481 sockares.Complete (e);
1485 sockares.Complete (total);
1488 public int EndReceive (IAsyncResult asyncResult, out SocketError errorCode)
1490 ThrowIfDisposedAndClosed ();
1492 SocketAsyncResult sockares = ValidateEndIAsyncResult (asyncResult, "EndReceive", "asyncResult");
1494 if (!sockares.IsCompleted)
1495 sockares.AsyncWaitHandle.WaitOne ();
1497 errorCode = sockares.ErrorCode;
1499 if (errorCode != SocketError.Success && errorCode != SocketError.WouldBlock && errorCode != SocketError.InProgress)
1500 is_connected = false;
1502 // If no socket error occurred, call CheckIfThrowDelayedException in case there are other
1503 // kinds of exceptions that should be thrown.
1504 if (errorCode == SocketError.Success)
1505 sockares.CheckIfThrowDelayedException();
1507 return sockares.Total;
1510 static int Receive_internal (SafeSocketHandle safeHandle, WSABUF[] bufarray, SocketFlags flags, out int error, bool blocking)
1513 safeHandle.RegisterForBlockingSyscall ();
1514 return Receive_internal (safeHandle.DangerousGetHandle (), bufarray, flags, out error, blocking);
1516 safeHandle.UnRegisterForBlockingSyscall ();
1520 [MethodImplAttribute (MethodImplOptions.InternalCall)]
1521 extern static int Receive_internal (IntPtr sock, WSABUF[] bufarray, SocketFlags flags, out int error, bool blocking);
1523 static int Receive_internal (SafeSocketHandle safeHandle, byte[] buffer, int offset, int count, SocketFlags flags, out int error, bool blocking)
1526 safeHandle.RegisterForBlockingSyscall ();
1527 return Receive_internal (safeHandle.DangerousGetHandle (), buffer, offset, count, flags, out error, blocking);
1529 safeHandle.UnRegisterForBlockingSyscall ();
1533 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1534 extern static int Receive_internal(IntPtr sock, byte[] buffer, int offset, int count, SocketFlags flags, out int error, bool blocking);
1540 public int ReceiveFrom (byte [] buffer, int offset, int size, SocketFlags socketFlags, ref EndPoint remoteEP)
1542 ThrowIfDisposedAndClosed ();
1543 ThrowIfBufferNull (buffer);
1544 ThrowIfBufferOutOfRange (buffer, offset, size);
1546 if (remoteEP == null)
1547 throw new ArgumentNullException ("remoteEP");
1549 SocketError errorCode;
1550 int ret = ReceiveFrom (buffer, offset, size, socketFlags, ref remoteEP, out errorCode);
1552 if (errorCode != SocketError.Success)
1553 throw new SocketException (errorCode);
1558 internal int ReceiveFrom (byte [] buffer, int offset, int size, SocketFlags socketFlags, ref EndPoint remoteEP, out SocketError errorCode)
1560 SocketAddress sockaddr = remoteEP.Serialize();
1563 int cnt = ReceiveFrom_internal (m_Handle, buffer, offset, size, socketFlags, ref sockaddr, out nativeError, is_blocking);
1565 errorCode = (SocketError) nativeError;
1566 if (errorCode != SocketError.Success) {
1567 if (errorCode != SocketError.WouldBlock && errorCode != SocketError.InProgress) {
1568 is_connected = false;
1569 } else if (errorCode == SocketError.WouldBlock && is_blocking) { // This might happen when ReceiveTimeout is set
1570 errorCode = SocketError.TimedOut;
1576 is_connected = true;
1579 /* If sockaddr is null then we're a connection oriented protocol and should ignore the
1580 * remoteEP parameter (see MSDN documentation for Socket.ReceiveFrom(...) ) */
1581 if (sockaddr != null) {
1582 /* Stupidly, EndPoint.Create() is an instance method */
1583 remoteEP = remoteEP.Create (sockaddr);
1586 seed_endpoint = remoteEP;
1591 public bool ReceiveFromAsync (SocketAsyncEventArgs e)
1593 ThrowIfDisposedAndClosed ();
1595 // We do not support recv into multiple buffers yet
1596 if (e.BufferList != null)
1597 throw new NotSupportedException ("Mono doesn't support using BufferList at this point.");
1598 if (e.RemoteEndPoint == null)
1599 throw new ArgumentNullException ("remoteEP", "Value cannot be null.");
1601 InitSocketAsyncEventArgs (e, ReceiveFromAsyncCallback, e, SocketOperation.ReceiveFrom);
1603 e.socket_async_result.Buffer = e.Buffer;
1604 e.socket_async_result.Offset = e.Offset;
1605 e.socket_async_result.Size = e.Count;
1606 e.socket_async_result.EndPoint = e.RemoteEndPoint;
1607 e.socket_async_result.SockFlags = e.SocketFlags;
1609 QueueIOSelectorJob (ReadSem, e.socket_async_result.Handle, new IOSelectorJob (IOOperation.Read, BeginReceiveFromCallback, e.socket_async_result));
1614 static AsyncCallback ReceiveFromAsyncCallback = new AsyncCallback (ares => {
1615 SocketAsyncEventArgs e = (SocketAsyncEventArgs) ((SocketAsyncResult) ares).AsyncState;
1617 if (Interlocked.Exchange (ref e.in_progress, 0) != 1)
1618 throw new InvalidOperationException ("No operation in progress");
1621 e.BytesTransferred = e.current_socket.EndReceiveFrom (ares, ref e.remote_ep);
1622 } catch (SocketException ex) {
1623 e.SocketError = ex.SocketErrorCode;
1624 } catch (ObjectDisposedException) {
1625 e.SocketError = SocketError.OperationAborted;
1631 public IAsyncResult BeginReceiveFrom (byte[] buffer, int offset, int size, SocketFlags socketFlags, ref EndPoint remoteEP, AsyncCallback callback, object state)
1633 ThrowIfDisposedAndClosed ();
1634 ThrowIfBufferNull (buffer);
1635 ThrowIfBufferOutOfRange (buffer, offset, size);
1637 if (remoteEP == null)
1638 throw new ArgumentNullException ("remoteEP");
1640 SocketAsyncResult sockares = new SocketAsyncResult (this, callback, state, SocketOperation.ReceiveFrom) {
1644 SockFlags = socketFlags,
1645 EndPoint = remoteEP,
1648 QueueIOSelectorJob (ReadSem, sockares.Handle, new IOSelectorJob (IOOperation.Read, BeginReceiveFromCallback, sockares));
1653 static IOAsyncCallback BeginReceiveFromCallback = new IOAsyncCallback (ares => {
1654 SocketAsyncResult sockares = (SocketAsyncResult) ares;
1658 SocketError errorCode;
1659 total = sockares.socket.ReceiveFrom (sockares.Buffer, sockares.Offset, sockares.Size, sockares.SockFlags, ref sockares.EndPoint, out errorCode);
1661 if (errorCode != SocketError.Success) {
1662 sockares.Complete (new SocketException (errorCode));
1665 } catch (Exception e) {
1666 sockares.Complete (e);
1670 sockares.Complete (total);
1673 public int EndReceiveFrom(IAsyncResult asyncResult, ref EndPoint endPoint)
1675 ThrowIfDisposedAndClosed ();
1677 if (endPoint == null)
1678 throw new ArgumentNullException ("endPoint");
1680 SocketAsyncResult sockares = ValidateEndIAsyncResult (asyncResult, "EndReceiveFrom", "asyncResult");
1682 if (!sockares.IsCompleted)
1683 sockares.AsyncWaitHandle.WaitOne();
1685 sockares.CheckIfThrowDelayedException();
1687 endPoint = sockares.EndPoint;
1689 return sockares.Total;
1694 static int ReceiveFrom_internal (SafeSocketHandle safeHandle, byte[] buffer, int offset, int count, SocketFlags flags, ref SocketAddress sockaddr, out int error, bool blocking)
1697 safeHandle.RegisterForBlockingSyscall ();
1698 return ReceiveFrom_internal (safeHandle.DangerousGetHandle (), buffer, offset, count, flags, ref sockaddr, out error, blocking);
1700 safeHandle.UnRegisterForBlockingSyscall ();
1704 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1705 extern static int ReceiveFrom_internal(IntPtr sock, byte[] buffer, int offset, int count, SocketFlags flags, ref SocketAddress sockaddr, out int error, bool blocking);
1709 #region ReceiveMessageFrom
1711 [MonoTODO ("Not implemented")]
1712 public int ReceiveMessageFrom (byte[] buffer, int offset, int size, ref SocketFlags socketFlags, ref EndPoint remoteEP, out IPPacketInformation ipPacketInformation)
1714 ThrowIfDisposedAndClosed ();
1715 ThrowIfBufferNull (buffer);
1716 ThrowIfBufferOutOfRange (buffer, offset, size);
1718 if (remoteEP == null)
1719 throw new ArgumentNullException ("remoteEP");
1721 // FIXME: figure out how we get hold of the IPPacketInformation
1722 throw new NotImplementedException ();
1725 [MonoTODO ("Not implemented")]
1726 public bool ReceiveMessageFromAsync (SocketAsyncEventArgs e)
1728 // NO check is made whether e != null in MS.NET (NRE is thrown in such case)
1730 ThrowIfDisposedAndClosed ();
1732 throw new NotImplementedException ();
1736 public IAsyncResult BeginReceiveMessageFrom (byte[] buffer, int offset, int size, SocketFlags socketFlags, ref EndPoint remoteEP, AsyncCallback callback, object state)
1738 ThrowIfDisposedAndClosed ();
1739 ThrowIfBufferNull (buffer);
1740 ThrowIfBufferOutOfRange (buffer, offset, size);
1742 if (remoteEP == null)
1743 throw new ArgumentNullException ("remoteEP");
1745 throw new NotImplementedException ();
1749 public int EndReceiveMessageFrom (IAsyncResult asyncResult, ref SocketFlags socketFlags, ref EndPoint endPoint, out IPPacketInformation ipPacketInformation)
1751 ThrowIfDisposedAndClosed ();
1753 if (endPoint == null)
1754 throw new ArgumentNullException ("endPoint");
1756 /*SocketAsyncResult sockares =*/ ValidateEndIAsyncResult (asyncResult, "EndReceiveMessageFrom", "asyncResult");
1758 throw new NotImplementedException ();
1765 public int Send (byte [] buffer, int offset, int size, SocketFlags socketFlags, out SocketError errorCode)
1767 ThrowIfDisposedAndClosed ();
1768 ThrowIfBufferNull (buffer);
1769 ThrowIfBufferOutOfRange (buffer, offset, size);
1772 errorCode = SocketError.Success;
1779 sent += Send_internal (
1780 m_Handle, buffer, offset + sent, size - sent, socketFlags, out nativeError, is_blocking);
1781 errorCode = (SocketError)nativeError;
1782 if (errorCode != SocketError.Success && errorCode != SocketError.WouldBlock && errorCode != SocketError.InProgress) {
1783 is_connected = false;
1787 is_connected = true;
1789 } while (sent < size);
1794 [CLSCompliant (false)]
1795 public int Send (IList<ArraySegment<byte>> buffers, SocketFlags socketFlags, out SocketError errorCode)
1797 ThrowIfDisposedAndClosed ();
1799 if (buffers == null)
1800 throw new ArgumentNullException ("buffers");
1801 if (buffers.Count == 0)
1802 throw new ArgumentException ("Buffer is empty", "buffers");
1804 int numsegments = buffers.Count;
1808 WSABUF[] bufarray = new WSABUF[numsegments];
1809 GCHandle[] gch = new GCHandle[numsegments];
1811 for(int i = 0; i < numsegments; i++) {
1812 ArraySegment<byte> segment = buffers[i];
1814 if (segment.Offset < 0 || segment.Count < 0 || segment.Count > segment.Array.Length - segment.Offset)
1815 throw new ArgumentOutOfRangeException ("segment");
1817 gch[i] = GCHandle.Alloc (segment.Array, GCHandleType.Pinned);
1818 bufarray[i].len = segment.Count;
1819 bufarray[i].buf = Marshal.UnsafeAddrOfPinnedArrayElement (segment.Array, segment.Offset);
1823 ret = Send_internal (m_Handle, bufarray, socketFlags, out nativeError, is_blocking);
1825 for(int i = 0; i < numsegments; i++) {
1826 if (gch[i].IsAllocated) {
1832 errorCode = (SocketError)nativeError;
1837 public bool SendAsync (SocketAsyncEventArgs e)
1839 // NO check is made whether e != null in MS.NET (NRE is thrown in such case)
1841 ThrowIfDisposedAndClosed ();
1843 if (e.Buffer == null && e.BufferList == null)
1844 throw new NullReferenceException ("Either e.Buffer or e.BufferList must be valid buffers.");
1846 if (e.Buffer == null) {
1847 InitSocketAsyncEventArgs (e, SendAsyncCallback, e, SocketOperation.SendGeneric);
1849 e.socket_async_result.Buffers = e.BufferList;
1851 QueueIOSelectorJob (WriteSem, e.socket_async_result.Handle, new IOSelectorJob (IOOperation.Write, BeginSendGenericCallback, e.socket_async_result));
1853 InitSocketAsyncEventArgs (e, SendAsyncCallback, e, SocketOperation.Send);
1855 e.socket_async_result.Buffer = e.Buffer;
1856 e.socket_async_result.Offset = e.Offset;
1857 e.socket_async_result.Size = e.Count;
1859 QueueIOSelectorJob (WriteSem, e.socket_async_result.Handle, new IOSelectorJob (IOOperation.Write, s => BeginSendCallback ((SocketAsyncResult) s, 0), e.socket_async_result));
1865 static AsyncCallback SendAsyncCallback = new AsyncCallback (ares => {
1866 SocketAsyncEventArgs e = (SocketAsyncEventArgs) ((SocketAsyncResult) ares).AsyncState;
1868 if (Interlocked.Exchange (ref e.in_progress, 0) != 1)
1869 throw new InvalidOperationException ("No operation in progress");
1872 e.BytesTransferred = e.current_socket.EndSend (ares);
1873 } catch (SocketException se){
1874 e.SocketError = se.SocketErrorCode;
1875 } catch (ObjectDisposedException) {
1876 e.SocketError = SocketError.OperationAborted;
1882 public IAsyncResult BeginSend (byte[] buffer, int offset, int size, SocketFlags socketFlags, out SocketError errorCode, AsyncCallback callback, object state)
1884 ThrowIfDisposedAndClosed ();
1885 ThrowIfBufferNull (buffer);
1886 ThrowIfBufferOutOfRange (buffer, offset, size);
1888 if (!is_connected) {
1889 errorCode = SocketError.NotConnected;
1893 errorCode = SocketError.Success;
1895 SocketAsyncResult sockares = new SocketAsyncResult (this, callback, state, SocketOperation.Send) {
1899 SockFlags = socketFlags,
1902 QueueIOSelectorJob (WriteSem, sockares.Handle, new IOSelectorJob (IOOperation.Write, s => BeginSendCallback ((SocketAsyncResult) s, 0), sockares));
1907 static void BeginSendCallback (SocketAsyncResult sockares, int sent_so_far)
1912 total = Socket.Send_internal (sockares.socket.m_Handle, sockares.Buffer, sockares.Offset, sockares.Size, sockares.SockFlags, out sockares.error, false);
1913 } catch (Exception e) {
1914 sockares.Complete (e);
1918 if (sockares.error == 0) {
1919 sent_so_far += total;
1920 sockares.Offset += total;
1921 sockares.Size -= total;
1923 if (sockares.socket.CleanedUp) {
1924 sockares.Complete (total);
1928 if (sockares.Size > 0) {
1929 IOSelector.Add (sockares.Handle, new IOSelectorJob (IOOperation.Write, s => BeginSendCallback ((SocketAsyncResult) s, sent_so_far), sockares));
1930 return; // Have to finish writing everything. See bug #74475.
1933 sockares.Total = sent_so_far;
1936 sockares.Complete (total);
1939 [CLSCompliant (false)]
1940 public IAsyncResult BeginSend (IList<ArraySegment<byte>> buffers, SocketFlags socketFlags, out SocketError errorCode, AsyncCallback callback, object state)
1942 ThrowIfDisposedAndClosed ();
1944 if (buffers == null)
1945 throw new ArgumentNullException ("buffers");
1947 if (!is_connected) {
1948 errorCode = SocketError.NotConnected;
1952 errorCode = SocketError.Success;
1954 SocketAsyncResult sockares = new SocketAsyncResult (this, callback, state, SocketOperation.SendGeneric) {
1956 SockFlags = socketFlags,
1959 QueueIOSelectorJob (WriteSem, sockares.Handle, new IOSelectorJob (IOOperation.Write, BeginSendGenericCallback, sockares));
1964 static IOAsyncCallback BeginSendGenericCallback = new IOAsyncCallback (ares => {
1965 SocketAsyncResult sockares = (SocketAsyncResult) ares;
1969 total = sockares.socket.Send (sockares.Buffers, sockares.SockFlags);
1970 } catch (Exception e) {
1971 sockares.Complete (e);
1975 sockares.Complete (total);
1978 public int EndSend (IAsyncResult asyncResult, out SocketError errorCode)
1980 ThrowIfDisposedAndClosed ();
1982 SocketAsyncResult sockares = ValidateEndIAsyncResult (asyncResult, "EndSend", "asyncResult");
1984 if (!sockares.IsCompleted)
1985 sockares.AsyncWaitHandle.WaitOne ();
1987 errorCode = sockares.ErrorCode;
1989 if (errorCode != SocketError.Success && errorCode != SocketError.WouldBlock && errorCode != SocketError.InProgress)
1990 is_connected = false;
1992 /* If no socket error occurred, call CheckIfThrowDelayedException in
1993 * case there are other kinds of exceptions that should be thrown.*/
1994 if (errorCode == SocketError.Success)
1995 sockares.CheckIfThrowDelayedException ();
1997 return sockares.Total;
2000 static int Send_internal (SafeSocketHandle safeHandle, WSABUF[] bufarray, SocketFlags flags, out int error, bool blocking)
2003 safeHandle.RegisterForBlockingSyscall ();
2004 return Send_internal (safeHandle.DangerousGetHandle (), bufarray, flags, out error, blocking);
2006 safeHandle.UnRegisterForBlockingSyscall ();
2010 [MethodImplAttribute (MethodImplOptions.InternalCall)]
2011 extern static int Send_internal (IntPtr sock, WSABUF[] bufarray, SocketFlags flags, out int error, bool blocking);
2013 static int Send_internal (SafeSocketHandle safeHandle, byte[] buf, int offset, int count, SocketFlags flags, out int error, bool blocking)
2016 safeHandle.RegisterForBlockingSyscall ();
2017 return Send_internal (safeHandle.DangerousGetHandle (), buf, offset, count, flags, out error, blocking);
2019 safeHandle.UnRegisterForBlockingSyscall ();
2023 [MethodImplAttribute(MethodImplOptions.InternalCall)]
2024 extern static int Send_internal(IntPtr sock, byte[] buf, int offset, int count, SocketFlags flags, out int error, bool blocking);
2030 public int SendTo (byte [] buffer, int offset, int size, SocketFlags socketFlags, EndPoint remoteEP)
2032 ThrowIfDisposedAndClosed ();
2033 ThrowIfBufferNull (buffer);
2034 ThrowIfBufferOutOfRange (buffer, offset, size);
2036 if (remoteEP == null)
2037 throw new ArgumentNullException("remoteEP");
2040 int ret = SendTo_internal (m_Handle, buffer, offset, size, socketFlags, remoteEP.Serialize (), out error, is_blocking);
2042 SocketError err = (SocketError) error;
2044 if (err != SocketError.WouldBlock && err != SocketError.InProgress)
2045 is_connected = false;
2046 throw new SocketException (error);
2049 is_connected = true;
2051 seed_endpoint = remoteEP;
2056 public bool SendToAsync (SocketAsyncEventArgs e)
2058 // NO check is made whether e != null in MS.NET (NRE is thrown in such case)
2060 ThrowIfDisposedAndClosed ();
2062 if (e.BufferList != null)
2063 throw new NotSupportedException ("Mono doesn't support using BufferList at this point.");
2064 if (e.RemoteEndPoint == null)
2065 throw new ArgumentNullException ("remoteEP", "Value cannot be null.");
2067 InitSocketAsyncEventArgs (e, SendToAsyncCallback, e, SocketOperation.SendTo);
2069 e.socket_async_result.Buffer = e.Buffer;
2070 e.socket_async_result.Offset = e.Offset;
2071 e.socket_async_result.Size = e.Count;
2072 e.socket_async_result.SockFlags = e.SocketFlags;
2073 e.socket_async_result.EndPoint = e.RemoteEndPoint;
2075 QueueIOSelectorJob (WriteSem, e.socket_async_result.Handle, new IOSelectorJob (IOOperation.Write, s => BeginSendToCallback ((SocketAsyncResult) s, 0), e.socket_async_result));
2080 static AsyncCallback SendToAsyncCallback = new AsyncCallback (ares => {
2081 SocketAsyncEventArgs e = (SocketAsyncEventArgs) ((SocketAsyncResult) ares).AsyncState;
2083 if (Interlocked.Exchange (ref e.in_progress, 0) != 1)
2084 throw new InvalidOperationException ("No operation in progress");
2087 e.BytesTransferred = e.current_socket.EndSendTo (ares);
2088 } catch (SocketException ex) {
2089 e.SocketError = ex.SocketErrorCode;
2090 } catch (ObjectDisposedException) {
2091 e.SocketError = SocketError.OperationAborted;
2097 public IAsyncResult BeginSendTo(byte[] buffer, int offset, int size, SocketFlags socketFlags, EndPoint remoteEP, AsyncCallback callback, object state)
2099 ThrowIfDisposedAndClosed ();
2100 ThrowIfBufferNull (buffer);
2101 ThrowIfBufferOutOfRange (buffer, offset, size);
2103 SocketAsyncResult sockares = new SocketAsyncResult (this, callback, state, SocketOperation.SendTo) {
2107 SockFlags = socketFlags,
2108 EndPoint = remoteEP,
2111 QueueIOSelectorJob (WriteSem, sockares.Handle, new IOSelectorJob (IOOperation.Write, s => BeginSendToCallback ((SocketAsyncResult) s, 0), sockares));
2116 static void BeginSendToCallback (SocketAsyncResult sockares, int sent_so_far)
2120 total = sockares.socket.SendTo (sockares.Buffer, sockares.Offset, sockares.Size, sockares.SockFlags, sockares.EndPoint);
2122 if (sockares.error == 0) {
2123 sent_so_far += total;
2124 sockares.Offset += total;
2125 sockares.Size -= total;
2128 if (sockares.Size > 0) {
2129 IOSelector.Add (sockares.Handle, new IOSelectorJob (IOOperation.Write, s => BeginSendToCallback ((SocketAsyncResult) s, sent_so_far), sockares));
2130 return; // Have to finish writing everything. See bug #74475.
2133 sockares.Total = sent_so_far;
2134 } catch (Exception e) {
2135 sockares.Complete (e);
2139 sockares.Complete ();
2142 public int EndSendTo (IAsyncResult asyncResult)
2144 ThrowIfDisposedAndClosed ();
2146 SocketAsyncResult sockares = ValidateEndIAsyncResult (asyncResult, "EndSendTo", "result");
2148 if (!sockares.IsCompleted)
2149 sockares.AsyncWaitHandle.WaitOne();
2151 sockares.CheckIfThrowDelayedException();
2153 return sockares.Total;
2156 static int SendTo_internal (SafeSocketHandle safeHandle, byte[] buffer, int offset, int count, SocketFlags flags, SocketAddress sa, out int error, bool blocking)
2159 safeHandle.RegisterForBlockingSyscall ();
2160 return SendTo_internal (safeHandle.DangerousGetHandle (), buffer, offset, count, flags, sa, out error, blocking);
2162 safeHandle.UnRegisterForBlockingSyscall ();
2166 [MethodImplAttribute(MethodImplOptions.InternalCall)]
2167 extern static int SendTo_internal (IntPtr sock, byte[] buffer, int offset, int count, SocketFlags flags, SocketAddress sa, out int error, bool blocking);
2173 public void SendFile (string fileName, byte[] preBuffer, byte[] postBuffer, TransmitFileOptions flags)
2175 ThrowIfDisposedAndClosed ();
2178 throw new NotSupportedException ();
2180 throw new InvalidOperationException ();
2183 if (!SendFile_internal (m_Handle, fileName, preBuffer, postBuffer, flags, out error, is_blocking) || error != 0) {
2184 SocketException exc = new SocketException (error);
2185 if (exc.ErrorCode == 2 || exc.ErrorCode == 3)
2186 throw new FileNotFoundException ();
2191 public IAsyncResult BeginSendFile (string fileName, byte[] preBuffer, byte[] postBuffer, TransmitFileOptions flags, AsyncCallback callback, object state)
2193 ThrowIfDisposedAndClosed ();
2196 throw new NotSupportedException ();
2197 if (!File.Exists (fileName))
2198 throw new FileNotFoundException ();
2200 SendFileHandler handler = new SendFileHandler (SendFile);
2202 return new SendFileAsyncResult (handler, handler.BeginInvoke (fileName, preBuffer, postBuffer, flags, ar => callback (new SendFileAsyncResult (handler, ar)), state));
2205 public void EndSendFile (IAsyncResult asyncResult)
2207 ThrowIfDisposedAndClosed ();
2209 if (asyncResult == null)
2210 throw new ArgumentNullException ("asyncResult");
2212 SendFileAsyncResult ares = asyncResult as SendFileAsyncResult;
2214 throw new ArgumentException ("Invalid IAsyncResult", "asyncResult");
2216 ares.Delegate.EndInvoke (ares.Original);
2219 static bool SendFile_internal (SafeSocketHandle safeHandle, string filename, byte [] pre_buffer, byte [] post_buffer, TransmitFileOptions flags, out int error, bool blocking)
2222 safeHandle.RegisterForBlockingSyscall ();
2223 return SendFile_internal (safeHandle.DangerousGetHandle (), filename, pre_buffer, post_buffer, flags, out error, blocking);
2225 safeHandle.UnRegisterForBlockingSyscall ();
2229 [MethodImplAttribute(MethodImplOptions.InternalCall)]
2230 extern static bool SendFile_internal (IntPtr sock, string filename, byte [] pre_buffer, byte [] post_buffer, TransmitFileOptions flags, out int error, bool blocking);
2232 delegate void SendFileHandler (string fileName, byte [] preBuffer, byte [] postBuffer, TransmitFileOptions flags);
2234 sealed class SendFileAsyncResult : IAsyncResult {
2238 public SendFileAsyncResult (SendFileHandler d, IAsyncResult ares)
2244 public object AsyncState {
2245 get { return ares.AsyncState; }
2248 public WaitHandle AsyncWaitHandle {
2249 get { return ares.AsyncWaitHandle; }
2252 public bool CompletedSynchronously {
2253 get { return ares.CompletedSynchronously; }
2256 public bool IsCompleted {
2257 get { return ares.IsCompleted; }
2260 public SendFileHandler Delegate {
2264 public IAsyncResult Original {
2265 get { return ares; }
2273 [MonoTODO ("Not implemented")]
2274 public bool SendPacketsAsync (SocketAsyncEventArgs e)
2276 // NO check is made whether e != null in MS.NET (NRE is thrown in such case)
2278 ThrowIfDisposedAndClosed ();
2280 throw new NotImplementedException ();
2285 #region DuplicateAndClose
2287 [MonoLimitation ("We do not support passing sockets across processes, we merely allow this API to pass the socket across AppDomains")]
2288 public SocketInformation DuplicateAndClose (int targetProcessId)
2290 var si = new SocketInformation ();
2292 (is_listening ? SocketInformationOptions.Listening : 0) |
2293 (is_connected ? SocketInformationOptions.Connected : 0) |
2294 (is_blocking ? 0 : SocketInformationOptions.NonBlocking) |
2295 (useOverlappedIO ? SocketInformationOptions.UseOnlyOverlappedIO : 0);
2298 IntPtr duplicateHandle;
2299 if (!MonoIO.DuplicateHandle (System.Diagnostics.Process.GetCurrentProcess ().Handle, Handle, new IntPtr (targetProcessId), out duplicateHandle, 0, 0, 0x00000002 /* DUPLICATE_SAME_ACCESS */, out error))
2300 throw MonoIO.GetException (error);
2302 si.ProtocolInformation = Mono.DataConverter.Pack ("iiiil", (int)addressFamily, (int)socketType, (int)protocolType, is_bound ? 1 : 0, (long)duplicateHandle);
2310 #region GetSocketOption
2312 public void GetSocketOption (SocketOptionLevel optionLevel, SocketOptionName optionName, byte [] optionValue)
2314 ThrowIfDisposedAndClosed ();
2316 if (optionValue == null)
2317 throw new SocketException ((int) SocketError.Fault, "Error trying to dereference an invalid pointer");
2320 GetSocketOption_arr_internal (m_Handle, optionLevel, optionName, ref optionValue, out error);
2323 throw new SocketException (error);
2326 public byte [] GetSocketOption (SocketOptionLevel optionLevel, SocketOptionName optionName, int optionLength)
2328 ThrowIfDisposedAndClosed ();
2331 byte[] byte_val = new byte [optionLength];
2332 GetSocketOption_arr_internal (m_Handle, optionLevel, optionName, ref byte_val, out error);
2335 throw new SocketException (error);
2340 public object GetSocketOption (SocketOptionLevel optionLevel, SocketOptionName optionName)
2342 ThrowIfDisposedAndClosed ();
2346 GetSocketOption_obj_internal (m_Handle, optionLevel, optionName, out obj_val, out error);
2349 throw new SocketException (error);
2351 if (optionName == SocketOptionName.Linger)
2352 return (LingerOption) obj_val;
2353 else if (optionName == SocketOptionName.AddMembership || optionName == SocketOptionName.DropMembership)
2354 return (MulticastOption) obj_val;
2355 else if (obj_val is int)
2356 return (int) obj_val;
2361 static void GetSocketOption_arr_internal (SafeSocketHandle safeHandle, SocketOptionLevel level, SocketOptionName name, ref byte[] byte_val, out int error)
2363 bool release = false;
2365 safeHandle.DangerousAddRef (ref release);
2366 GetSocketOption_arr_internal (safeHandle.DangerousGetHandle (), level, name, ref byte_val, out error);
2369 safeHandle.DangerousRelease ();
2373 [MethodImplAttribute(MethodImplOptions.InternalCall)]
2374 extern static void GetSocketOption_arr_internal(IntPtr socket, SocketOptionLevel level, SocketOptionName name, ref byte[] byte_val, out int error);
2376 static void GetSocketOption_obj_internal (SafeSocketHandle safeHandle, SocketOptionLevel level, SocketOptionName name, out object obj_val, out int error)
2378 bool release = false;
2380 safeHandle.DangerousAddRef (ref release);
2381 GetSocketOption_obj_internal (safeHandle.DangerousGetHandle (), level, name, out obj_val, out error);
2384 safeHandle.DangerousRelease ();
2388 [MethodImplAttribute(MethodImplOptions.InternalCall)]
2389 extern static void GetSocketOption_obj_internal(IntPtr socket, SocketOptionLevel level, SocketOptionName name, out object obj_val, out int error);
2393 #region SetSocketOption
2395 public void SetSocketOption (SocketOptionLevel optionLevel, SocketOptionName optionName, byte [] optionValue)
2397 ThrowIfDisposedAndClosed ();
2399 // I'd throw an ArgumentNullException, but this is what MS does.
2400 if (optionValue == null)
2401 throw new SocketException ((int) SocketError.Fault, "Error trying to dereference an invalid pointer");
2404 SetSocketOption_internal (m_Handle, optionLevel, optionName, null, optionValue, 0, out error);
2407 if (error == (int) SocketError.InvalidArgument)
2408 throw new ArgumentException ();
2409 throw new SocketException (error);
2413 public void SetSocketOption (SocketOptionLevel optionLevel, SocketOptionName optionName, object optionValue)
2415 ThrowIfDisposedAndClosed ();
2417 // NOTE: if a null is passed, the byte[] overload is used instead...
2418 if (optionValue == null)
2419 throw new ArgumentNullException("optionValue");
2423 if (optionLevel == SocketOptionLevel.Socket && optionName == SocketOptionName.Linger) {
2424 LingerOption linger = optionValue as LingerOption;
2426 throw new ArgumentException ("A 'LingerOption' value must be specified.", "optionValue");
2427 SetSocketOption_internal (m_Handle, optionLevel, optionName, linger, null, 0, out error);
2428 } else if (optionLevel == SocketOptionLevel.IP && (optionName == SocketOptionName.AddMembership || optionName == SocketOptionName.DropMembership)) {
2429 MulticastOption multicast = optionValue as MulticastOption;
2430 if (multicast == null)
2431 throw new ArgumentException ("A 'MulticastOption' value must be specified.", "optionValue");
2432 SetSocketOption_internal (m_Handle, optionLevel, optionName, multicast, null, 0, out error);
2433 } else if (optionLevel == SocketOptionLevel.IPv6 && (optionName == SocketOptionName.AddMembership || optionName == SocketOptionName.DropMembership)) {
2434 IPv6MulticastOption multicast = optionValue as IPv6MulticastOption;
2435 if (multicast == null)
2436 throw new ArgumentException ("A 'IPv6MulticastOption' value must be specified.", "optionValue");
2437 SetSocketOption_internal (m_Handle, optionLevel, optionName, multicast, null, 0, out error);
2439 throw new ArgumentException ("Invalid value specified.", "optionValue");
2443 if (error == (int) SocketError.InvalidArgument)
2444 throw new ArgumentException ();
2445 throw new SocketException (error);
2449 public void SetSocketOption (SocketOptionLevel optionLevel, SocketOptionName optionName, bool optionValue)
2451 int int_val = optionValue ? 1 : 0;
2453 SetSocketOption (optionLevel, optionName, int_val);
2456 public void SetSocketOption (SocketOptionLevel optionLevel, SocketOptionName optionName, int optionValue)
2458 ThrowIfDisposedAndClosed ();
2461 SetSocketOption_internal (m_Handle, optionLevel, optionName, null, null, optionValue, out error);
2464 if (error == (int) SocketError.InvalidArgument)
2465 throw new ArgumentException ();
2466 throw new SocketException (error);
2470 static void SetSocketOption_internal (SafeSocketHandle safeHandle, SocketOptionLevel level, SocketOptionName name, object obj_val, byte [] byte_val, int int_val, out int error)
2472 bool release = false;
2474 safeHandle.DangerousAddRef (ref release);
2475 SetSocketOption_internal (safeHandle.DangerousGetHandle (), level, name, obj_val, byte_val, int_val, out error);
2478 safeHandle.DangerousRelease ();
2482 [MethodImplAttribute(MethodImplOptions.InternalCall)]
2483 extern static void SetSocketOption_internal (IntPtr socket, SocketOptionLevel level, SocketOptionName name, object obj_val, byte [] byte_val, int int_val, out int error);
2489 public int IOControl (int ioControlCode, byte [] optionInValue, byte [] optionOutValue)
2492 throw new ObjectDisposedException (GetType ().ToString ());
2495 int result = IOControl_internal (m_Handle, ioControlCode, optionInValue, optionOutValue, out error);
2498 throw new SocketException (error);
2500 throw new InvalidOperationException ("Must use Blocking property instead.");
2505 static int IOControl_internal (SafeSocketHandle safeHandle, int ioctl_code, byte [] input, byte [] output, out int error)
2507 bool release = false;
2509 safeHandle.DangerousAddRef (ref release);
2510 return IOControl_internal (safeHandle.DangerousGetHandle (), ioctl_code, input, output, out error);
2513 safeHandle.DangerousRelease ();
2517 /* See Socket.IOControl, WSAIoctl documentation in MSDN. The common options between UNIX
2518 * and Winsock are FIONREAD, FIONBIO and SIOCATMARK. Anything else will depend on the system
2519 * except SIO_KEEPALIVE_VALS which is properly handled on both windows and linux. */
2520 [MethodImplAttribute(MethodImplOptions.InternalCall)]
2521 extern static int IOControl_internal (IntPtr sock, int ioctl_code, byte [] input, byte [] output, out int error);
2527 public void Close ()
2533 public void Close (int timeout)
2535 linger_timeout = timeout;
2539 [MethodImplAttribute(MethodImplOptions.InternalCall)]
2540 internal extern static void Close_internal (IntPtr socket, out int error);
2546 public void Shutdown (SocketShutdown how)
2548 ThrowIfDisposedAndClosed ();
2551 throw new SocketException (10057); // Not connected
2554 Shutdown_internal (m_Handle, how, out error);
2557 throw new SocketException (error);
2560 static void Shutdown_internal (SafeSocketHandle safeHandle, SocketShutdown how, out int error)
2562 bool release = false;
2564 safeHandle.DangerousAddRef (ref release);
2565 Shutdown_internal (safeHandle.DangerousGetHandle (), how, out error);
2568 safeHandle.DangerousRelease ();
2572 [MethodImplAttribute (MethodImplOptions.InternalCall)]
2573 internal extern static void Shutdown_internal (IntPtr socket, SocketShutdown how, out int error);
2579 protected virtual void Dispose (bool disposing)
2585 bool was_connected = is_connected;
2586 is_connected = false;
2588 if (m_Handle != null) {
2595 m_Handle.Dispose ();
2599 void Linger (IntPtr handle)
2601 if (!is_connected || linger_timeout <= 0)
2604 /* We don't want to receive any more data */
2606 Shutdown_internal (handle, SocketShutdown.Receive, out error);
2611 int seconds = linger_timeout / 1000;
2612 int ms = linger_timeout % 1000;
2614 /* If the other end closes, this will return 'true' with 'Available' == 0 */
2615 Poll_internal (handle, SelectMode.SelectRead, ms * 1000, out error);
2621 LingerOption linger = new LingerOption (true, seconds);
2622 SetSocketOption_internal (handle, SocketOptionLevel.Socket, SocketOptionName.Linger, linger, null, 0, out error);
2623 /* Not needed, we're closing upon return */
2631 void ThrowIfDisposedAndClosed (Socket socket)
2633 if (socket.CleanedUp && socket.is_closed)
2634 throw new ObjectDisposedException (socket.GetType ().ToString ());
2637 void ThrowIfDisposedAndClosed ()
2639 if (CleanedUp && is_closed)
2640 throw new ObjectDisposedException (GetType ().ToString ());
2643 void ThrowIfBufferNull (byte[] buffer)
2646 throw new ArgumentNullException ("buffer");
2649 void ThrowIfBufferOutOfRange (byte[] buffer, int offset, int size)
2652 throw new ArgumentOutOfRangeException ("offset", "offset must be >= 0");
2653 if (offset > buffer.Length)
2654 throw new ArgumentOutOfRangeException ("offset", "offset must be <= buffer.Length");
2656 throw new ArgumentOutOfRangeException ("size", "size must be >= 0");
2657 if (size > buffer.Length - offset)
2658 throw new ArgumentOutOfRangeException ("size", "size must be <= buffer.Length - offset");
2663 if (protocolType == ProtocolType.Udp)
2664 throw new SocketException ((int)SocketError.ProtocolOption);
2667 SocketAsyncResult ValidateEndIAsyncResult (IAsyncResult ares, string methodName, string argName)
2670 throw new ArgumentNullException (argName);
2672 SocketAsyncResult sockares = ares as SocketAsyncResult;
2673 if (sockares == null)
2674 throw new ArgumentException ("Invalid IAsyncResult", argName);
2675 if (Interlocked.CompareExchange (ref sockares.EndCalled, 1, 0) == 1)
2676 throw new InvalidOperationException (methodName + " can only be called once per asynchronous operation");
2681 void QueueIOSelectorJob (SemaphoreSlim sem, IntPtr handle, IOSelectorJob job)
2683 var task = sem.WaitAsync();
2684 // fast path without Task<Action> allocation.
2685 if (task.IsCompleted) {
2687 job.MarkDisposed ();
2690 IOSelector.Add (handle, job);
2694 task.ContinueWith( t => {
2696 job.MarkDisposed ();
2699 IOSelector.Add(handle, job);
2704 void InitSocketAsyncEventArgs (SocketAsyncEventArgs e, AsyncCallback callback, object state, SocketOperation operation)
2706 e.socket_async_result.Init (this, callback, state, operation);
2707 if (e.AcceptSocket != null) {
2708 e.socket_async_result.AcceptSocket = e.AcceptSocket;
2710 e.current_socket = this;
2711 e.SetLastOperation (SocketOperationToSocketAsyncOperation (operation));
2712 e.SocketError = SocketError.Success;
2713 e.BytesTransferred = 0;
2716 SocketAsyncOperation SocketOperationToSocketAsyncOperation (SocketOperation op)
2719 case SocketOperation.Connect:
2720 return SocketAsyncOperation.Connect;
2721 case SocketOperation.Accept:
2722 return SocketAsyncOperation.Accept;
2723 case SocketOperation.Disconnect:
2724 return SocketAsyncOperation.Disconnect;
2725 case SocketOperation.Receive:
2726 case SocketOperation.ReceiveGeneric:
2727 return SocketAsyncOperation.Receive;
2728 case SocketOperation.ReceiveFrom:
2729 return SocketAsyncOperation.ReceiveFrom;
2730 case SocketOperation.Send:
2731 case SocketOperation.SendGeneric:
2732 return SocketAsyncOperation.Send;
2733 case SocketOperation.SendTo:
2734 return SocketAsyncOperation.SendTo;
2736 throw new NotImplementedException (String.Format ("Operation {0} is not implemented", op));
2740 IPEndPoint RemapIPEndPoint (IPEndPoint input) {
2741 // If socket is DualMode ensure we automatically handle mapping IPv4 addresses to IPv6.
2742 if (IsDualMode && input.AddressFamily == AddressFamily.InterNetwork)
2743 return new IPEndPoint (input.Address.MapToIPv6 (), input.Port);
2748 [StructLayout (LayoutKind.Sequential)]
2754 [MethodImplAttribute(MethodImplOptions.InternalCall)]
2755 internal static extern void cancel_blocking_socket_operation (Thread thread);
2757 [MethodImplAttribute(MethodImplOptions.InternalCall)]
2758 internal static extern bool SupportsPortReuse (ProtocolType proto);
2760 internal static int FamilyHint {
2763 // MONO_HINT_UNSPECIFIED = 0,
2764 // MONO_HINT_IPV4 = 1,
2765 // MONO_HINT_IPV6 = 2,
2768 if (OSSupportsIPv4) {
2772 if (OSSupportsIPv6) {
2773 hint = hint == 0 ? 2 : 0;
2780 static bool IsProtocolSupported (NetworkInterfaceComponent networkInterface)
2785 var nics = NetworkInterface.GetAllNetworkInterfaces ();
2786 foreach (var adapter in nics) {
2787 if (adapter.Supports (networkInterface))