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 result)
716 return EndAccept (out buffer, out bytes, result);
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 e.socket_async_result.EndPoint = e.RemoteEndPoint;
905 ares = (SocketAsyncResult) BeginConnect (e.RemoteEndPoint, ConnectAsyncCallback, e);
907 DnsEndPoint dep = (e.RemoteEndPoint as DnsEndPoint);
908 e.socket_async_result.Addresses = addresses;
909 e.socket_async_result.Port = dep.Port;
910 ares = (SocketAsyncResult) BeginConnect (addresses, dep.Port, ConnectAsyncCallback, e);
913 if (ares.IsCompleted && ares.CompletedSynchronously) {
914 ares.CheckIfThrowDelayedException ();
917 } catch (Exception exc) {
918 e.socket_async_result.Complete (exc, true);
925 public static void CancelConnectAsync (SocketAsyncEventArgs e)
928 throw new ArgumentNullException("e");
930 if (e.in_progress != 0 && e.LastOperation == SocketAsyncOperation.Connect)
931 e.current_socket.Close();
934 static AsyncCallback ConnectAsyncCallback = new AsyncCallback (ares => {
935 SocketAsyncEventArgs e = (SocketAsyncEventArgs) ((SocketAsyncResult) ares).AsyncState;
937 if (Interlocked.Exchange (ref e.in_progress, 0) != 1)
938 throw new InvalidOperationException ("No operation in progress");
941 e.current_socket.EndConnect (ares);
942 } catch (SocketException se) {
943 e.SocketError = se.SocketErrorCode;
944 } catch (ObjectDisposedException) {
945 e.SocketError = SocketError.OperationAborted;
951 public IAsyncResult BeginConnect (string host, int port, AsyncCallback callback, object state)
953 ThrowIfDisposedAndClosed ();
956 throw new ArgumentNullException ("host");
957 if (addressFamily != AddressFamily.InterNetwork && addressFamily != AddressFamily.InterNetworkV6)
958 throw new NotSupportedException ("This method is valid only for sockets in the InterNetwork and InterNetworkV6 families");
959 if (port <= 0 || port > 65535)
960 throw new ArgumentOutOfRangeException ("port", "Must be > 0 and < 65536");
962 throw new InvalidOperationException ();
964 return BeginConnect (Dns.GetHostAddresses (host), port, callback, state);
967 public IAsyncResult BeginConnect (EndPoint end_point, AsyncCallback callback, object state)
969 ThrowIfDisposedAndClosed ();
971 if (end_point == null)
972 throw new ArgumentNullException ("end_point");
974 throw new InvalidOperationException ();
976 SocketAsyncResult sockares = new SocketAsyncResult (this, callback, state, SocketOperation.Connect) {
977 EndPoint = end_point,
980 // Bug #75154: Connect() should not succeed for .Any addresses.
981 if (end_point is IPEndPoint) {
982 IPEndPoint ep = (IPEndPoint) end_point;
983 if (ep.Address.Equals (IPAddress.Any) || ep.Address.Equals (IPAddress.IPv6Any)) {
984 sockares.Complete (new SocketException ((int) SocketError.AddressNotAvailable), true);
988 end_point = RemapIPEndPoint (ep);
993 if (connect_in_progress) {
994 // This could happen when multiple IPs are used
995 // Calling connect() again will reset the connection attempt and cause
996 // an error. Better to just close the socket and move on.
997 connect_in_progress = false;
999 m_Handle = new SafeSocketHandle (Socket_internal (addressFamily, socketType, protocolType, out error), true);
1001 throw new SocketException (error);
1004 bool blk = is_blocking;
1007 Connect_internal (m_Handle, end_point.Serialize (), out error, false);
1013 is_connected = true;
1015 sockares.Complete (true);
1019 if (error != (int) SocketError.InProgress && error != (int) SocketError.WouldBlock) {
1021 is_connected = false;
1023 sockares.Complete (new SocketException (error), true);
1028 is_connected = false;
1030 connect_in_progress = true;
1032 IOSelector.Add (sockares.Handle, new IOSelectorJob (IOOperation.Write, BeginConnectCallback, sockares));
1037 public IAsyncResult BeginConnect (IPAddress[] addresses, int port, AsyncCallback callback, object state)
1039 ThrowIfDisposedAndClosed ();
1041 if (addresses == null)
1042 throw new ArgumentNullException ("addresses");
1043 if (addresses.Length == 0)
1044 throw new ArgumentException ("Empty addresses list");
1045 if (this.AddressFamily != AddressFamily.InterNetwork && this.AddressFamily != AddressFamily.InterNetworkV6)
1046 throw new NotSupportedException ("This method is only valid for addresses in the InterNetwork or InterNetworkV6 families");
1047 if (port <= 0 || port > 65535)
1048 throw new ArgumentOutOfRangeException ("port", "Must be > 0 and < 65536");
1050 throw new InvalidOperationException ();
1052 SocketAsyncResult sockares = new SocketAsyncResult (this, callback, state, SocketOperation.Connect) {
1053 Addresses = addresses,
1057 is_connected = false;
1059 return BeginMConnect (sockares);
1062 internal IAsyncResult BeginMConnect (SocketAsyncResult sockares)
1064 SocketAsyncResult ares = null;
1065 Exception exc = null;
1066 AsyncCallback callback;
1068 for (int i = sockares.CurrentAddress; i < sockares.Addresses.Length; i++) {
1070 sockares.CurrentAddress++;
1072 ares = (SocketAsyncResult) BeginConnect (new IPEndPoint (sockares.Addresses [i], sockares.Port), null, sockares);
1073 if (ares.IsCompleted && ares.CompletedSynchronously) {
1074 ares.CheckIfThrowDelayedException ();
1076 callback = ares.AsyncCallback;
1077 if (callback != null)
1078 ThreadPool.UnsafeQueueUserWorkItem (_ => callback (ares), null);
1082 } catch (Exception e) {
1094 static IOAsyncCallback BeginConnectCallback = new IOAsyncCallback (ares => {
1095 SocketAsyncResult sockares = (SocketAsyncResult) ares;
1097 if (sockares.EndPoint == null) {
1098 sockares.Complete (new SocketException ((int)SocketError.AddressNotAvailable));
1102 SocketAsyncResult mconnect = sockares.AsyncState as SocketAsyncResult;
1103 bool is_mconnect = mconnect != null && mconnect.Addresses != null;
1106 EndPoint ep = sockares.EndPoint;
1107 int error_code = (int) sockares.socket.GetSocketOption (SocketOptionLevel.Socket, SocketOptionName.Error);
1109 if (error_code == 0) {
1111 sockares = mconnect;
1113 sockares.socket.seed_endpoint = ep;
1114 sockares.socket.is_connected = true;
1115 sockares.socket.is_bound = true;
1116 sockares.socket.connect_in_progress = false;
1118 sockares.Complete ();
1123 sockares.socket.connect_in_progress = false;
1124 sockares.Complete (new SocketException (error_code));
1128 if (mconnect.CurrentAddress >= mconnect.Addresses.Length) {
1129 mconnect.Complete (new SocketException (error_code));
1133 mconnect.socket.BeginMConnect (mconnect);
1134 } catch (Exception e) {
1135 sockares.socket.connect_in_progress = false;
1138 sockares = mconnect;
1140 sockares.Complete (e);
1145 public void EndConnect (IAsyncResult result)
1147 ThrowIfDisposedAndClosed ();
1149 SocketAsyncResult sockares = ValidateEndIAsyncResult (result, "EndConnect", "result");
1151 if (!sockares.IsCompleted)
1152 sockares.AsyncWaitHandle.WaitOne();
1154 sockares.CheckIfThrowDelayedException();
1157 static void Connect_internal (SafeSocketHandle safeHandle, SocketAddress sa, out int error, bool blocking)
1160 safeHandle.RegisterForBlockingSyscall ();
1161 Connect_internal (safeHandle.DangerousGetHandle (), sa, out error, blocking);
1163 safeHandle.UnRegisterForBlockingSyscall ();
1167 /* Connects to the remote address */
1168 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1169 extern static void Connect_internal(IntPtr sock, SocketAddress sa, out int error, bool blocking);
1172 * - false when it is ok to use RemoteEndPoint
1173 * - true when addresses must be used (and addresses could be null/empty) */
1174 bool GetCheckedIPs (SocketAsyncEventArgs e, out IPAddress [] addresses)
1178 // Connect to the first address that match the host name, like:
1179 // http://blogs.msdn.com/ncl/archive/2009/07/20/new-ncl-features-in-net-4-0-beta-2.aspx
1180 // while skipping entries that do not match the address family
1181 DnsEndPoint dep = e.RemoteEndPoint as DnsEndPoint;
1183 addresses = Dns.GetHostAddresses (dep.Host);
1186 e.ConnectByNameError = null;
1195 /* According to the docs, the MS runtime will throw PlatformNotSupportedException
1196 * if the platform is newer than w2k. We should be able to cope... */
1197 public void Disconnect (bool reuseSocket)
1199 ThrowIfDisposedAndClosed ();
1202 Disconnect_internal (m_Handle, reuseSocket, out error);
1206 /* ERROR_NOT_SUPPORTED */
1207 throw new PlatformNotSupportedException ();
1209 throw new SocketException (error);
1213 is_connected = false;
1215 /* Do managed housekeeping here... */
1219 public bool DisconnectAsync (SocketAsyncEventArgs e)
1221 // NO check is made whether e != null in MS.NET (NRE is thrown in such case)
1223 ThrowIfDisposedAndClosed ();
1225 InitSocketAsyncEventArgs (e, DisconnectAsyncCallback, e, SocketOperation.Disconnect);
1227 IOSelector.Add (e.socket_async_result.Handle, new IOSelectorJob (IOOperation.Write, BeginDisconnectCallback, e.socket_async_result));
1232 static AsyncCallback DisconnectAsyncCallback = new AsyncCallback (ares => {
1233 SocketAsyncEventArgs e = (SocketAsyncEventArgs) ((SocketAsyncResult) ares).AsyncState;
1235 if (Interlocked.Exchange (ref e.in_progress, 0) != 1)
1236 throw new InvalidOperationException ("No operation in progress");
1239 e.current_socket.EndDisconnect (ares);
1240 } catch (SocketException ex) {
1241 e.SocketError = ex.SocketErrorCode;
1242 } catch (ObjectDisposedException) {
1243 e.SocketError = SocketError.OperationAborted;
1249 public IAsyncResult BeginDisconnect (bool reuseSocket, AsyncCallback callback, object state)
1251 ThrowIfDisposedAndClosed ();
1253 SocketAsyncResult sockares = new SocketAsyncResult (this, callback, state, SocketOperation.Disconnect) {
1254 ReuseSocket = reuseSocket,
1257 IOSelector.Add (sockares.Handle, new IOSelectorJob (IOOperation.Write, BeginDisconnectCallback, sockares));
1262 static IOAsyncCallback BeginDisconnectCallback = new IOAsyncCallback (ares => {
1263 SocketAsyncResult sockares = (SocketAsyncResult) ares;
1266 sockares.socket.Disconnect (sockares.ReuseSocket);
1267 } catch (Exception e) {
1268 sockares.Complete (e);
1272 sockares.Complete ();
1275 public void EndDisconnect (IAsyncResult asyncResult)
1277 ThrowIfDisposedAndClosed ();
1279 SocketAsyncResult sockares = ValidateEndIAsyncResult (asyncResult, "EndDisconnect", "asyncResult");
1281 if (!sockares.IsCompleted)
1282 sockares.AsyncWaitHandle.WaitOne ();
1284 sockares.CheckIfThrowDelayedException ();
1287 static void Disconnect_internal (SafeSocketHandle safeHandle, bool reuse, out int error)
1289 bool release = false;
1291 safeHandle.DangerousAddRef (ref release);
1292 Disconnect_internal (safeHandle.DangerousGetHandle (), reuse, out error);
1295 safeHandle.DangerousRelease ();
1299 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1300 extern static void Disconnect_internal (IntPtr sock, bool reuse, out int error);
1306 public int Receive (byte [] buffer, int offset, int size, SocketFlags socketFlags, out SocketError errorCode)
1308 ThrowIfDisposedAndClosed ();
1309 ThrowIfBufferNull (buffer);
1310 ThrowIfBufferOutOfRange (buffer, offset, size);
1313 int ret = Receive_internal (m_Handle, buffer, offset, size, socketFlags, out nativeError, is_blocking);
1315 errorCode = (SocketError) nativeError;
1316 if (errorCode != SocketError.Success && errorCode != SocketError.WouldBlock && errorCode != SocketError.InProgress) {
1317 is_connected = false;
1320 is_connected = true;
1326 [CLSCompliant (false)]
1327 public int Receive (IList<ArraySegment<byte>> buffers, SocketFlags socketFlags, out SocketError errorCode)
1329 ThrowIfDisposedAndClosed ();
1331 if (buffers == null || buffers.Count == 0)
1332 throw new ArgumentNullException ("buffers");
1334 int numsegments = buffers.Count;
1338 /* Only example I can find of sending a byte array reference directly into an internal
1339 * call is in System.Runtime.Remoting/System.Runtime.Remoting.Channels.Ipc.Win32/NamedPipeSocket.cs,
1340 * so taking a lead from that... */
1341 WSABUF[] bufarray = new WSABUF[numsegments];
1342 GCHandle[] gch = new GCHandle[numsegments];
1344 for (int i = 0; i < numsegments; i++) {
1345 ArraySegment<byte> segment = buffers[i];
1347 if (segment.Offset < 0 || segment.Count < 0 || segment.Count > segment.Array.Length - segment.Offset)
1348 throw new ArgumentOutOfRangeException ("segment");
1350 gch[i] = GCHandle.Alloc (segment.Array, GCHandleType.Pinned);
1351 bufarray[i].len = segment.Count;
1352 bufarray[i].buf = Marshal.UnsafeAddrOfPinnedArrayElement (segment.Array, segment.Offset);
1356 ret = Receive_internal (m_Handle, bufarray, socketFlags, out nativeError, is_blocking);
1358 for (int i = 0; i < numsegments; i++) {
1359 if (gch[i].IsAllocated)
1364 errorCode = (SocketError) nativeError;
1369 public bool ReceiveAsync (SocketAsyncEventArgs e)
1371 // NO check is made whether e != null in MS.NET (NRE is thrown in such case)
1373 ThrowIfDisposedAndClosed ();
1375 // LAME SPEC: the ArgumentException is never thrown, instead an NRE is
1376 // thrown when e.Buffer and e.BufferList are null (works fine when one is
1377 // set to a valid object)
1378 if (e.Buffer == null && e.BufferList == null)
1379 throw new NullReferenceException ("Either e.Buffer or e.BufferList must be valid buffers.");
1381 if (e.Buffer == null) {
1382 InitSocketAsyncEventArgs (e, ReceiveAsyncCallback, e, SocketOperation.ReceiveGeneric);
1384 e.socket_async_result.Buffers = e.BufferList;
1386 QueueIOSelectorJob (ReadSem, e.socket_async_result.Handle, new IOSelectorJob (IOOperation.Read, BeginReceiveGenericCallback, e.socket_async_result));
1388 InitSocketAsyncEventArgs (e, ReceiveAsyncCallback, e, SocketOperation.Receive);
1390 e.socket_async_result.Buffer = e.Buffer;
1391 e.socket_async_result.Offset = e.Offset;
1392 e.socket_async_result.Size = e.Count;
1394 QueueIOSelectorJob (ReadSem, e.socket_async_result.Handle, new IOSelectorJob (IOOperation.Read, BeginReceiveCallback, e.socket_async_result));
1400 static AsyncCallback ReceiveAsyncCallback = new AsyncCallback (ares => {
1401 SocketAsyncEventArgs e = (SocketAsyncEventArgs) ((SocketAsyncResult) ares).AsyncState;
1403 if (Interlocked.Exchange (ref e.in_progress, 0) != 1)
1404 throw new InvalidOperationException ("No operation in progress");
1407 e.BytesTransferred = e.current_socket.EndReceive (ares);
1408 } catch (SocketException se){
1409 e.SocketError = se.SocketErrorCode;
1410 } catch (ObjectDisposedException) {
1411 e.SocketError = SocketError.OperationAborted;
1417 public IAsyncResult BeginReceive (byte[] buffer, int offset, int size, SocketFlags socketFlags, out SocketError errorCode, AsyncCallback callback, object state)
1419 ThrowIfDisposedAndClosed ();
1420 ThrowIfBufferNull (buffer);
1421 ThrowIfBufferOutOfRange (buffer, offset, size);
1423 /* As far as I can tell from the docs and from experimentation, a pointer to the
1424 * SocketError parameter is not supposed to be saved for the async parts. And as we don't
1425 * set any socket errors in the setup code, we just have to set it to Success. */
1426 errorCode = SocketError.Success;
1428 SocketAsyncResult sockares = new SocketAsyncResult (this, callback, state, SocketOperation.Receive) {
1432 SockFlags = socketFlags,
1435 QueueIOSelectorJob (ReadSem, sockares.Handle, new IOSelectorJob (IOOperation.Read, BeginReceiveCallback, sockares));
1440 static IOAsyncCallback BeginReceiveCallback = new IOAsyncCallback (ares => {
1441 SocketAsyncResult sockares = (SocketAsyncResult) ares;
1445 total = Receive_internal (sockares.socket.m_Handle, sockares.Buffer, sockares.Offset, sockares.Size, sockares.SockFlags, out sockares.error, sockares.socket.is_blocking);
1446 } catch (Exception e) {
1447 sockares.Complete (e);
1451 sockares.Complete (total);
1454 [CLSCompliant (false)]
1455 public IAsyncResult BeginReceive (IList<ArraySegment<byte>> buffers, SocketFlags socketFlags, out SocketError errorCode, AsyncCallback callback, object state)
1457 ThrowIfDisposedAndClosed ();
1459 if (buffers == null)
1460 throw new ArgumentNullException ("buffers");
1462 /* I assume the same SocketError semantics as above */
1463 errorCode = SocketError.Success;
1465 SocketAsyncResult sockares = new SocketAsyncResult (this, callback, state, SocketOperation.ReceiveGeneric) {
1467 SockFlags = socketFlags,
1470 QueueIOSelectorJob (ReadSem, sockares.Handle, new IOSelectorJob (IOOperation.Read, BeginReceiveGenericCallback, sockares));
1475 static IOAsyncCallback BeginReceiveGenericCallback = new IOAsyncCallback (ares => {
1476 SocketAsyncResult sockares = (SocketAsyncResult) ares;
1480 total = sockares.socket.Receive (sockares.Buffers, sockares.SockFlags);
1481 } catch (Exception e) {
1482 sockares.Complete (e);
1486 sockares.Complete (total);
1489 public int EndReceive (IAsyncResult asyncResult, out SocketError errorCode)
1491 ThrowIfDisposedAndClosed ();
1493 SocketAsyncResult sockares = ValidateEndIAsyncResult (asyncResult, "EndReceive", "asyncResult");
1495 if (!sockares.IsCompleted)
1496 sockares.AsyncWaitHandle.WaitOne ();
1498 errorCode = sockares.ErrorCode;
1500 if (errorCode != SocketError.Success && errorCode != SocketError.WouldBlock && errorCode != SocketError.InProgress)
1501 is_connected = false;
1503 // If no socket error occurred, call CheckIfThrowDelayedException in case there are other
1504 // kinds of exceptions that should be thrown.
1505 if (errorCode == SocketError.Success)
1506 sockares.CheckIfThrowDelayedException();
1508 return sockares.Total;
1511 static int Receive_internal (SafeSocketHandle safeHandle, WSABUF[] bufarray, SocketFlags flags, out int error, bool blocking)
1514 safeHandle.RegisterForBlockingSyscall ();
1515 return Receive_internal (safeHandle.DangerousGetHandle (), bufarray, flags, out error, blocking);
1517 safeHandle.UnRegisterForBlockingSyscall ();
1521 [MethodImplAttribute (MethodImplOptions.InternalCall)]
1522 extern static int Receive_internal (IntPtr sock, WSABUF[] bufarray, SocketFlags flags, out int error, bool blocking);
1524 static int Receive_internal (SafeSocketHandle safeHandle, byte[] buffer, int offset, int count, SocketFlags flags, out int error, bool blocking)
1527 safeHandle.RegisterForBlockingSyscall ();
1528 return Receive_internal (safeHandle.DangerousGetHandle (), buffer, offset, count, flags, out error, blocking);
1530 safeHandle.UnRegisterForBlockingSyscall ();
1534 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1535 extern static int Receive_internal(IntPtr sock, byte[] buffer, int offset, int count, SocketFlags flags, out int error, bool blocking);
1541 public int ReceiveFrom (byte [] buffer, int offset, int size, SocketFlags socketFlags, ref EndPoint remoteEP)
1543 ThrowIfDisposedAndClosed ();
1544 ThrowIfBufferNull (buffer);
1545 ThrowIfBufferOutOfRange (buffer, offset, size);
1547 if (remoteEP == null)
1548 throw new ArgumentNullException ("remoteEP");
1550 SocketError errorCode;
1551 int ret = ReceiveFrom (buffer, offset, size, socketFlags, ref remoteEP, out errorCode);
1553 if (errorCode != SocketError.Success)
1554 throw new SocketException (errorCode);
1559 internal int ReceiveFrom (byte [] buffer, int offset, int size, SocketFlags socketFlags, ref EndPoint remoteEP, out SocketError errorCode)
1561 SocketAddress sockaddr = remoteEP.Serialize();
1564 int cnt = ReceiveFrom_internal (m_Handle, buffer, offset, size, socketFlags, ref sockaddr, out nativeError, is_blocking);
1566 errorCode = (SocketError) nativeError;
1567 if (errorCode != SocketError.Success) {
1568 if (errorCode != SocketError.WouldBlock && errorCode != SocketError.InProgress) {
1569 is_connected = false;
1570 } else if (errorCode == SocketError.WouldBlock && is_blocking) { // This might happen when ReceiveTimeout is set
1571 errorCode = SocketError.TimedOut;
1577 is_connected = true;
1580 /* If sockaddr is null then we're a connection oriented protocol and should ignore the
1581 * remoteEP parameter (see MSDN documentation for Socket.ReceiveFrom(...) ) */
1582 if (sockaddr != null) {
1583 /* Stupidly, EndPoint.Create() is an instance method */
1584 remoteEP = remoteEP.Create (sockaddr);
1587 seed_endpoint = remoteEP;
1592 public bool ReceiveFromAsync (SocketAsyncEventArgs e)
1594 ThrowIfDisposedAndClosed ();
1596 // We do not support recv into multiple buffers yet
1597 if (e.BufferList != null)
1598 throw new NotSupportedException ("Mono doesn't support using BufferList at this point.");
1599 if (e.RemoteEndPoint == null)
1600 throw new ArgumentNullException ("remoteEP", "Value cannot be null.");
1602 InitSocketAsyncEventArgs (e, ReceiveFromAsyncCallback, e, SocketOperation.ReceiveFrom);
1604 e.socket_async_result.Buffer = e.Buffer;
1605 e.socket_async_result.Offset = e.Offset;
1606 e.socket_async_result.Size = e.Count;
1607 e.socket_async_result.EndPoint = e.RemoteEndPoint;
1608 e.socket_async_result.SockFlags = e.SocketFlags;
1610 QueueIOSelectorJob (ReadSem, e.socket_async_result.Handle, new IOSelectorJob (IOOperation.Read, BeginReceiveFromCallback, e.socket_async_result));
1615 static AsyncCallback ReceiveFromAsyncCallback = new AsyncCallback (ares => {
1616 SocketAsyncEventArgs e = (SocketAsyncEventArgs) ((SocketAsyncResult) ares).AsyncState;
1618 if (Interlocked.Exchange (ref e.in_progress, 0) != 1)
1619 throw new InvalidOperationException ("No operation in progress");
1622 e.BytesTransferred = e.current_socket.EndReceiveFrom (ares, ref e.remote_ep);
1623 } catch (SocketException ex) {
1624 e.SocketError = ex.SocketErrorCode;
1625 } catch (ObjectDisposedException) {
1626 e.SocketError = SocketError.OperationAborted;
1632 public IAsyncResult BeginReceiveFrom (byte[] buffer, int offset, int size, SocketFlags socket_flags, ref EndPoint remote_end, AsyncCallback callback, object state)
1634 ThrowIfDisposedAndClosed ();
1635 ThrowIfBufferNull (buffer);
1636 ThrowIfBufferOutOfRange (buffer, offset, size);
1638 if (remote_end == null)
1639 throw new ArgumentNullException ("remote_end");
1641 SocketAsyncResult sockares = new SocketAsyncResult (this, callback, state, SocketOperation.ReceiveFrom) {
1645 SockFlags = socket_flags,
1646 EndPoint = remote_end,
1649 QueueIOSelectorJob (ReadSem, sockares.Handle, new IOSelectorJob (IOOperation.Read, BeginReceiveFromCallback, sockares));
1654 static IOAsyncCallback BeginReceiveFromCallback = new IOAsyncCallback (ares => {
1655 SocketAsyncResult sockares = (SocketAsyncResult) ares;
1659 SocketError errorCode;
1660 total = sockares.socket.ReceiveFrom (sockares.Buffer, sockares.Offset, sockares.Size, sockares.SockFlags, ref sockares.EndPoint, out errorCode);
1662 if (errorCode != SocketError.Success) {
1663 sockares.Complete (new SocketException (errorCode));
1666 } catch (Exception e) {
1667 sockares.Complete (e);
1671 sockares.Complete (total);
1674 public int EndReceiveFrom(IAsyncResult result, ref EndPoint end_point)
1676 ThrowIfDisposedAndClosed ();
1678 if (end_point == null)
1679 throw new ArgumentNullException ("remote_end");
1681 SocketAsyncResult sockares = ValidateEndIAsyncResult (result, "EndReceiveFrom", "result");
1683 if (!sockares.IsCompleted)
1684 sockares.AsyncWaitHandle.WaitOne();
1686 sockares.CheckIfThrowDelayedException();
1688 end_point = sockares.EndPoint;
1690 return sockares.Total;
1695 static int ReceiveFrom_internal (SafeSocketHandle safeHandle, byte[] buffer, int offset, int count, SocketFlags flags, ref SocketAddress sockaddr, out int error, bool blocking)
1698 safeHandle.RegisterForBlockingSyscall ();
1699 return ReceiveFrom_internal (safeHandle.DangerousGetHandle (), buffer, offset, count, flags, ref sockaddr, out error, blocking);
1701 safeHandle.UnRegisterForBlockingSyscall ();
1705 [MethodImplAttribute(MethodImplOptions.InternalCall)]
1706 extern static int ReceiveFrom_internal(IntPtr sock, byte[] buffer, int offset, int count, SocketFlags flags, ref SocketAddress sockaddr, out int error, bool blocking);
1710 #region ReceiveMessageFrom
1712 [MonoTODO ("Not implemented")]
1713 public int ReceiveMessageFrom (byte[] buffer, int offset, int size, ref SocketFlags socketFlags, ref EndPoint remoteEP, out IPPacketInformation ipPacketInformation)
1715 ThrowIfDisposedAndClosed ();
1716 ThrowIfBufferNull (buffer);
1717 ThrowIfBufferOutOfRange (buffer, offset, size);
1719 if (remoteEP == null)
1720 throw new ArgumentNullException ("remoteEP");
1722 // FIXME: figure out how we get hold of the IPPacketInformation
1723 throw new NotImplementedException ();
1726 [MonoTODO ("Not implemented")]
1727 public bool ReceiveMessageFromAsync (SocketAsyncEventArgs e)
1729 // NO check is made whether e != null in MS.NET (NRE is thrown in such case)
1731 ThrowIfDisposedAndClosed ();
1733 throw new NotImplementedException ();
1737 public IAsyncResult BeginReceiveMessageFrom (byte[] buffer, int offset, int size, SocketFlags socketFlags, ref EndPoint remoteEP, AsyncCallback callback, object state)
1739 ThrowIfDisposedAndClosed ();
1740 ThrowIfBufferNull (buffer);
1741 ThrowIfBufferOutOfRange (buffer, offset, size);
1743 if (remoteEP == null)
1744 throw new ArgumentNullException ("remoteEP");
1746 throw new NotImplementedException ();
1750 public int EndReceiveMessageFrom (IAsyncResult asyncResult, ref SocketFlags socketFlags, ref EndPoint endPoint, out IPPacketInformation ipPacketInformation)
1752 ThrowIfDisposedAndClosed ();
1754 if (endPoint == null)
1755 throw new ArgumentNullException ("endPoint");
1757 /*SocketAsyncResult sockares =*/ ValidateEndIAsyncResult (asyncResult, "EndReceiveMessageFrom", "asyncResult");
1759 throw new NotImplementedException ();
1766 public int Send (byte [] buffer, int offset, int size, SocketFlags socketFlags, out SocketError errorCode)
1768 ThrowIfDisposedAndClosed ();
1769 ThrowIfBufferNull (buffer);
1770 ThrowIfBufferOutOfRange (buffer, offset, size);
1773 errorCode = SocketError.Success;
1780 sent += Send_internal (
1781 m_Handle, buffer, offset + sent, size - sent, socketFlags, out nativeError, is_blocking);
1782 errorCode = (SocketError)nativeError;
1783 if (errorCode != SocketError.Success && errorCode != SocketError.WouldBlock && errorCode != SocketError.InProgress) {
1784 is_connected = false;
1788 is_connected = true;
1790 } while (sent < size);
1795 [CLSCompliant (false)]
1796 public int Send (IList<ArraySegment<byte>> buffers, SocketFlags socketFlags, out SocketError errorCode)
1798 ThrowIfDisposedAndClosed ();
1800 if (buffers == null)
1801 throw new ArgumentNullException ("buffers");
1802 if (buffers.Count == 0)
1803 throw new ArgumentException ("Buffer is empty", "buffers");
1805 int numsegments = buffers.Count;
1809 WSABUF[] bufarray = new WSABUF[numsegments];
1810 GCHandle[] gch = new GCHandle[numsegments];
1812 for(int i = 0; i < numsegments; i++) {
1813 ArraySegment<byte> segment = buffers[i];
1815 if (segment.Offset < 0 || segment.Count < 0 || segment.Count > segment.Array.Length - segment.Offset)
1816 throw new ArgumentOutOfRangeException ("segment");
1818 gch[i] = GCHandle.Alloc (segment.Array, GCHandleType.Pinned);
1819 bufarray[i].len = segment.Count;
1820 bufarray[i].buf = Marshal.UnsafeAddrOfPinnedArrayElement (segment.Array, segment.Offset);
1824 ret = Send_internal (m_Handle, bufarray, socketFlags, out nativeError, is_blocking);
1826 for(int i = 0; i < numsegments; i++) {
1827 if (gch[i].IsAllocated) {
1833 errorCode = (SocketError)nativeError;
1838 public bool SendAsync (SocketAsyncEventArgs e)
1840 // NO check is made whether e != null in MS.NET (NRE is thrown in such case)
1842 ThrowIfDisposedAndClosed ();
1844 if (e.Buffer == null && e.BufferList == null)
1845 throw new NullReferenceException ("Either e.Buffer or e.BufferList must be valid buffers.");
1847 if (e.Buffer == null) {
1848 InitSocketAsyncEventArgs (e, SendAsyncCallback, e, SocketOperation.SendGeneric);
1850 e.socket_async_result.Buffers = e.BufferList;
1852 QueueIOSelectorJob (WriteSem, e.socket_async_result.Handle, new IOSelectorJob (IOOperation.Write, BeginSendGenericCallback, e.socket_async_result));
1854 InitSocketAsyncEventArgs (e, SendAsyncCallback, e, SocketOperation.Send);
1856 e.socket_async_result.Buffer = e.Buffer;
1857 e.socket_async_result.Offset = e.Offset;
1858 e.socket_async_result.Size = e.Count;
1860 QueueIOSelectorJob (WriteSem, e.socket_async_result.Handle, new IOSelectorJob (IOOperation.Write, s => BeginSendCallback ((SocketAsyncResult) s, 0), e.socket_async_result));
1866 static AsyncCallback SendAsyncCallback = new AsyncCallback (ares => {
1867 SocketAsyncEventArgs e = (SocketAsyncEventArgs) ((SocketAsyncResult) ares).AsyncState;
1869 if (Interlocked.Exchange (ref e.in_progress, 0) != 1)
1870 throw new InvalidOperationException ("No operation in progress");
1873 e.BytesTransferred = e.current_socket.EndSend (ares);
1874 } catch (SocketException se){
1875 e.SocketError = se.SocketErrorCode;
1876 } catch (ObjectDisposedException) {
1877 e.SocketError = SocketError.OperationAborted;
1883 public IAsyncResult BeginSend (byte[] buffer, int offset, int size, SocketFlags socketFlags, out SocketError errorCode, AsyncCallback callback, object state)
1885 ThrowIfDisposedAndClosed ();
1886 ThrowIfBufferNull (buffer);
1887 ThrowIfBufferOutOfRange (buffer, offset, size);
1889 if (!is_connected) {
1890 errorCode = SocketError.NotConnected;
1894 errorCode = SocketError.Success;
1896 SocketAsyncResult sockares = new SocketAsyncResult (this, callback, state, SocketOperation.Send) {
1900 SockFlags = socketFlags,
1903 QueueIOSelectorJob (WriteSem, sockares.Handle, new IOSelectorJob (IOOperation.Write, s => BeginSendCallback ((SocketAsyncResult) s, 0), sockares));
1908 static void BeginSendCallback (SocketAsyncResult sockares, int sent_so_far)
1913 total = Socket.Send_internal (sockares.socket.m_Handle, sockares.Buffer, sockares.Offset, sockares.Size, sockares.SockFlags, out sockares.error, false);
1914 } catch (Exception e) {
1915 sockares.Complete (e);
1919 if (sockares.error == 0) {
1920 sent_so_far += total;
1921 sockares.Offset += total;
1922 sockares.Size -= total;
1924 if (sockares.socket.CleanedUp) {
1925 sockares.Complete (total);
1929 if (sockares.Size > 0) {
1930 IOSelector.Add (sockares.Handle, new IOSelectorJob (IOOperation.Write, s => BeginSendCallback ((SocketAsyncResult) s, sent_so_far), sockares));
1931 return; // Have to finish writing everything. See bug #74475.
1934 sockares.Total = sent_so_far;
1937 sockares.Complete (total);
1940 [CLSCompliant (false)]
1941 public IAsyncResult BeginSend (IList<ArraySegment<byte>> buffers, SocketFlags socketFlags, out SocketError errorCode, AsyncCallback callback, object state)
1943 ThrowIfDisposedAndClosed ();
1945 if (buffers == null)
1946 throw new ArgumentNullException ("buffers");
1948 if (!is_connected) {
1949 errorCode = SocketError.NotConnected;
1953 errorCode = SocketError.Success;
1955 SocketAsyncResult sockares = new SocketAsyncResult (this, callback, state, SocketOperation.SendGeneric) {
1957 SockFlags = socketFlags,
1960 QueueIOSelectorJob (WriteSem, sockares.Handle, new IOSelectorJob (IOOperation.Write, BeginSendGenericCallback, sockares));
1965 static IOAsyncCallback BeginSendGenericCallback = new IOAsyncCallback (ares => {
1966 SocketAsyncResult sockares = (SocketAsyncResult) ares;
1970 total = sockares.socket.Send (sockares.Buffers, sockares.SockFlags);
1971 } catch (Exception e) {
1972 sockares.Complete (e);
1976 sockares.Complete (total);
1979 public int EndSend (IAsyncResult asyncResult, out SocketError errorCode)
1981 ThrowIfDisposedAndClosed ();
1983 SocketAsyncResult sockares = ValidateEndIAsyncResult (asyncResult, "EndSend", "asyncResult");
1985 if (!sockares.IsCompleted)
1986 sockares.AsyncWaitHandle.WaitOne ();
1988 errorCode = sockares.ErrorCode;
1990 if (errorCode != SocketError.Success && errorCode != SocketError.WouldBlock && errorCode != SocketError.InProgress)
1991 is_connected = false;
1993 /* If no socket error occurred, call CheckIfThrowDelayedException in
1994 * case there are other kinds of exceptions that should be thrown.*/
1995 if (errorCode == SocketError.Success)
1996 sockares.CheckIfThrowDelayedException ();
1998 return sockares.Total;
2001 static int Send_internal (SafeSocketHandle safeHandle, WSABUF[] bufarray, SocketFlags flags, out int error, bool blocking)
2004 safeHandle.RegisterForBlockingSyscall ();
2005 return Send_internal (safeHandle.DangerousGetHandle (), bufarray, flags, out error, blocking);
2007 safeHandle.UnRegisterForBlockingSyscall ();
2011 [MethodImplAttribute (MethodImplOptions.InternalCall)]
2012 extern static int Send_internal (IntPtr sock, WSABUF[] bufarray, SocketFlags flags, out int error, bool blocking);
2014 static int Send_internal (SafeSocketHandle safeHandle, byte[] buf, int offset, int count, SocketFlags flags, out int error, bool blocking)
2017 safeHandle.RegisterForBlockingSyscall ();
2018 return Send_internal (safeHandle.DangerousGetHandle (), buf, offset, count, flags, out error, blocking);
2020 safeHandle.UnRegisterForBlockingSyscall ();
2024 [MethodImplAttribute(MethodImplOptions.InternalCall)]
2025 extern static int Send_internal(IntPtr sock, byte[] buf, int offset, int count, SocketFlags flags, out int error, bool blocking);
2031 public int SendTo (byte [] buffer, int offset, int size, SocketFlags socketFlags, EndPoint remoteEP)
2033 ThrowIfDisposedAndClosed ();
2034 ThrowIfBufferNull (buffer);
2035 ThrowIfBufferOutOfRange (buffer, offset, size);
2037 if (remoteEP == null)
2038 throw new ArgumentNullException("remoteEP");
2041 int ret = SendTo_internal (m_Handle, buffer, offset, size, socketFlags, remoteEP.Serialize (), out error, is_blocking);
2043 SocketError err = (SocketError) error;
2045 if (err != SocketError.WouldBlock && err != SocketError.InProgress)
2046 is_connected = false;
2047 throw new SocketException (error);
2050 is_connected = true;
2052 seed_endpoint = remoteEP;
2057 public bool SendToAsync (SocketAsyncEventArgs e)
2059 // NO check is made whether e != null in MS.NET (NRE is thrown in such case)
2061 ThrowIfDisposedAndClosed ();
2063 if (e.BufferList != null)
2064 throw new NotSupportedException ("Mono doesn't support using BufferList at this point.");
2065 if (e.RemoteEndPoint == null)
2066 throw new ArgumentNullException ("remoteEP", "Value cannot be null.");
2068 InitSocketAsyncEventArgs (e, SendToAsyncCallback, e, SocketOperation.SendTo);
2070 e.socket_async_result.Buffer = e.Buffer;
2071 e.socket_async_result.Offset = e.Offset;
2072 e.socket_async_result.Size = e.Count;
2073 e.socket_async_result.SockFlags = e.SocketFlags;
2074 e.socket_async_result.EndPoint = e.RemoteEndPoint;
2076 QueueIOSelectorJob (WriteSem, e.socket_async_result.Handle, new IOSelectorJob (IOOperation.Write, s => BeginSendToCallback ((SocketAsyncResult) s, 0), e.socket_async_result));
2081 static AsyncCallback SendToAsyncCallback = new AsyncCallback (ares => {
2082 SocketAsyncEventArgs e = (SocketAsyncEventArgs) ((SocketAsyncResult) ares).AsyncState;
2084 if (Interlocked.Exchange (ref e.in_progress, 0) != 1)
2085 throw new InvalidOperationException ("No operation in progress");
2088 e.BytesTransferred = e.current_socket.EndSendTo (ares);
2089 } catch (SocketException ex) {
2090 e.SocketError = ex.SocketErrorCode;
2091 } catch (ObjectDisposedException) {
2092 e.SocketError = SocketError.OperationAborted;
2098 public IAsyncResult BeginSendTo(byte[] buffer, int offset, int size, SocketFlags socket_flags, EndPoint remote_end, AsyncCallback callback, object state)
2100 ThrowIfDisposedAndClosed ();
2101 ThrowIfBufferNull (buffer);
2102 ThrowIfBufferOutOfRange (buffer, offset, size);
2104 SocketAsyncResult sockares = new SocketAsyncResult (this, callback, state, SocketOperation.SendTo) {
2108 SockFlags = socket_flags,
2109 EndPoint = remote_end,
2112 QueueIOSelectorJob (WriteSem, sockares.Handle, new IOSelectorJob (IOOperation.Write, s => BeginSendToCallback ((SocketAsyncResult) s, 0), sockares));
2117 static void BeginSendToCallback (SocketAsyncResult sockares, int sent_so_far)
2121 total = sockares.socket.SendTo (sockares.Buffer, sockares.Offset, sockares.Size, sockares.SockFlags, sockares.EndPoint);
2123 if (sockares.error == 0) {
2124 sent_so_far += total;
2125 sockares.Offset += total;
2126 sockares.Size -= total;
2129 if (sockares.Size > 0) {
2130 IOSelector.Add (sockares.Handle, new IOSelectorJob (IOOperation.Write, s => BeginSendToCallback ((SocketAsyncResult) s, sent_so_far), sockares));
2131 return; // Have to finish writing everything. See bug #74475.
2134 sockares.Total = sent_so_far;
2135 } catch (Exception e) {
2136 sockares.Complete (e);
2140 sockares.Complete ();
2143 public int EndSendTo (IAsyncResult result)
2145 ThrowIfDisposedAndClosed ();
2147 SocketAsyncResult sockares = ValidateEndIAsyncResult (result, "EndSendTo", "result");
2149 if (!sockares.IsCompleted)
2150 sockares.AsyncWaitHandle.WaitOne();
2152 sockares.CheckIfThrowDelayedException();
2154 return sockares.Total;
2157 static int SendTo_internal (SafeSocketHandle safeHandle, byte[] buffer, int offset, int count, SocketFlags flags, SocketAddress sa, out int error, bool blocking)
2160 safeHandle.RegisterForBlockingSyscall ();
2161 return SendTo_internal (safeHandle.DangerousGetHandle (), buffer, offset, count, flags, sa, out error, blocking);
2163 safeHandle.UnRegisterForBlockingSyscall ();
2167 [MethodImplAttribute(MethodImplOptions.InternalCall)]
2168 extern static int SendTo_internal (IntPtr sock, byte[] buffer, int offset, int count, SocketFlags flags, SocketAddress sa, out int error, bool blocking);
2174 public void SendFile (string fileName, byte[] preBuffer, byte[] postBuffer, TransmitFileOptions flags)
2176 ThrowIfDisposedAndClosed ();
2179 throw new NotSupportedException ();
2181 throw new InvalidOperationException ();
2184 if (!SendFile_internal (m_Handle, fileName, preBuffer, postBuffer, flags, out error, is_blocking) || error != 0) {
2185 SocketException exc = new SocketException (error);
2186 if (exc.ErrorCode == 2 || exc.ErrorCode == 3)
2187 throw new FileNotFoundException ();
2192 public IAsyncResult BeginSendFile (string fileName, byte[] preBuffer, byte[] postBuffer, TransmitFileOptions flags, AsyncCallback callback, object state)
2194 ThrowIfDisposedAndClosed ();
2197 throw new NotSupportedException ();
2198 if (!File.Exists (fileName))
2199 throw new FileNotFoundException ();
2201 SendFileHandler handler = new SendFileHandler (SendFile);
2203 return new SendFileAsyncResult (handler, handler.BeginInvoke (fileName, preBuffer, postBuffer, flags, ar => callback (new SendFileAsyncResult (handler, ar)), state));
2206 public void EndSendFile (IAsyncResult asyncResult)
2208 ThrowIfDisposedAndClosed ();
2210 if (asyncResult == null)
2211 throw new ArgumentNullException ("asyncResult");
2213 SendFileAsyncResult ares = asyncResult as SendFileAsyncResult;
2215 throw new ArgumentException ("Invalid IAsyncResult", "asyncResult");
2217 ares.Delegate.EndInvoke (ares.Original);
2220 static bool SendFile_internal (SafeSocketHandle safeHandle, string filename, byte [] pre_buffer, byte [] post_buffer, TransmitFileOptions flags, out int error, bool blocking)
2223 safeHandle.RegisterForBlockingSyscall ();
2224 return SendFile_internal (safeHandle.DangerousGetHandle (), filename, pre_buffer, post_buffer, flags, out error, blocking);
2226 safeHandle.UnRegisterForBlockingSyscall ();
2230 [MethodImplAttribute(MethodImplOptions.InternalCall)]
2231 extern static bool SendFile_internal (IntPtr sock, string filename, byte [] pre_buffer, byte [] post_buffer, TransmitFileOptions flags, out int error, bool blocking);
2233 delegate void SendFileHandler (string fileName, byte [] preBuffer, byte [] postBuffer, TransmitFileOptions flags);
2235 sealed class SendFileAsyncResult : IAsyncResult {
2239 public SendFileAsyncResult (SendFileHandler d, IAsyncResult ares)
2245 public object AsyncState {
2246 get { return ares.AsyncState; }
2249 public WaitHandle AsyncWaitHandle {
2250 get { return ares.AsyncWaitHandle; }
2253 public bool CompletedSynchronously {
2254 get { return ares.CompletedSynchronously; }
2257 public bool IsCompleted {
2258 get { return ares.IsCompleted; }
2261 public SendFileHandler Delegate {
2265 public IAsyncResult Original {
2266 get { return ares; }
2274 [MonoTODO ("Not implemented")]
2275 public bool SendPacketsAsync (SocketAsyncEventArgs e)
2277 // NO check is made whether e != null in MS.NET (NRE is thrown in such case)
2279 ThrowIfDisposedAndClosed ();
2281 throw new NotImplementedException ();
2286 #region DuplicateAndClose
2288 [MonoLimitation ("We do not support passing sockets across processes, we merely allow this API to pass the socket across AppDomains")]
2289 public SocketInformation DuplicateAndClose (int targetProcessId)
2291 var si = new SocketInformation ();
2293 (is_listening ? SocketInformationOptions.Listening : 0) |
2294 (is_connected ? SocketInformationOptions.Connected : 0) |
2295 (is_blocking ? 0 : SocketInformationOptions.NonBlocking) |
2296 (useOverlappedIO ? SocketInformationOptions.UseOnlyOverlappedIO : 0);
2298 si.ProtocolInformation = Mono.DataConverter.Pack ("iiiil", (int)addressFamily, (int)socketType, (int)protocolType, is_bound ? 1 : 0, (long)Handle);
2306 #region GetSocketOption
2308 public void GetSocketOption (SocketOptionLevel optionLevel, SocketOptionName optionName, byte [] optionValue)
2310 ThrowIfDisposedAndClosed ();
2312 if (optionValue == null)
2313 throw new SocketException ((int) SocketError.Fault, "Error trying to dereference an invalid pointer");
2316 GetSocketOption_arr_internal (m_Handle, optionLevel, optionName, ref optionValue, out error);
2319 throw new SocketException (error);
2322 public byte [] GetSocketOption (SocketOptionLevel optionLevel, SocketOptionName optionName, int optionLength)
2324 ThrowIfDisposedAndClosed ();
2327 byte[] byte_val = new byte [optionLength];
2328 GetSocketOption_arr_internal (m_Handle, optionLevel, optionName, ref byte_val, out error);
2331 throw new SocketException (error);
2336 public object GetSocketOption (SocketOptionLevel optionLevel, SocketOptionName optionName)
2338 ThrowIfDisposedAndClosed ();
2342 GetSocketOption_obj_internal (m_Handle, optionLevel, optionName, out obj_val, out error);
2345 throw new SocketException (error);
2347 if (optionName == SocketOptionName.Linger)
2348 return (LingerOption) obj_val;
2349 else if (optionName == SocketOptionName.AddMembership || optionName == SocketOptionName.DropMembership)
2350 return (MulticastOption) obj_val;
2351 else if (obj_val is int)
2352 return (int) obj_val;
2357 static void GetSocketOption_arr_internal (SafeSocketHandle safeHandle, SocketOptionLevel level, SocketOptionName name, ref byte[] byte_val, out int error)
2359 bool release = false;
2361 safeHandle.DangerousAddRef (ref release);
2362 GetSocketOption_arr_internal (safeHandle.DangerousGetHandle (), level, name, ref byte_val, out error);
2365 safeHandle.DangerousRelease ();
2369 [MethodImplAttribute(MethodImplOptions.InternalCall)]
2370 extern static void GetSocketOption_arr_internal(IntPtr socket, SocketOptionLevel level, SocketOptionName name, ref byte[] byte_val, out int error);
2372 static void GetSocketOption_obj_internal (SafeSocketHandle safeHandle, SocketOptionLevel level, SocketOptionName name, out object obj_val, out int error)
2374 bool release = false;
2376 safeHandle.DangerousAddRef (ref release);
2377 GetSocketOption_obj_internal (safeHandle.DangerousGetHandle (), level, name, out obj_val, out error);
2380 safeHandle.DangerousRelease ();
2384 [MethodImplAttribute(MethodImplOptions.InternalCall)]
2385 extern static void GetSocketOption_obj_internal(IntPtr socket, SocketOptionLevel level, SocketOptionName name, out object obj_val, out int error);
2389 #region SetSocketOption
2391 public void SetSocketOption (SocketOptionLevel optionLevel, SocketOptionName optionName, byte [] optionValue)
2393 ThrowIfDisposedAndClosed ();
2395 // I'd throw an ArgumentNullException, but this is what MS does.
2396 if (optionValue == null)
2397 throw new SocketException ((int) SocketError.Fault, "Error trying to dereference an invalid pointer");
2400 SetSocketOption_internal (m_Handle, optionLevel, optionName, null, optionValue, 0, out error);
2403 if (error == (int) SocketError.InvalidArgument)
2404 throw new ArgumentException ();
2405 throw new SocketException (error);
2409 public void SetSocketOption (SocketOptionLevel optionLevel, SocketOptionName optionName, object optionValue)
2411 ThrowIfDisposedAndClosed ();
2413 // NOTE: if a null is passed, the byte[] overload is used instead...
2414 if (optionValue == null)
2415 throw new ArgumentNullException("optionValue");
2419 if (optionLevel == SocketOptionLevel.Socket && optionName == SocketOptionName.Linger) {
2420 LingerOption linger = optionValue as LingerOption;
2422 throw new ArgumentException ("A 'LingerOption' value must be specified.", "optionValue");
2423 SetSocketOption_internal (m_Handle, optionLevel, optionName, linger, null, 0, out error);
2424 } else if (optionLevel == SocketOptionLevel.IP && (optionName == SocketOptionName.AddMembership || optionName == SocketOptionName.DropMembership)) {
2425 MulticastOption multicast = optionValue as MulticastOption;
2426 if (multicast == null)
2427 throw new ArgumentException ("A 'MulticastOption' value must be specified.", "optionValue");
2428 SetSocketOption_internal (m_Handle, optionLevel, optionName, multicast, null, 0, out error);
2429 } else if (optionLevel == SocketOptionLevel.IPv6 && (optionName == SocketOptionName.AddMembership || optionName == SocketOptionName.DropMembership)) {
2430 IPv6MulticastOption multicast = optionValue as IPv6MulticastOption;
2431 if (multicast == null)
2432 throw new ArgumentException ("A 'IPv6MulticastOption' value must be specified.", "optionValue");
2433 SetSocketOption_internal (m_Handle, optionLevel, optionName, multicast, null, 0, out error);
2435 throw new ArgumentException ("Invalid value specified.", "optionValue");
2439 if (error == (int) SocketError.InvalidArgument)
2440 throw new ArgumentException ();
2441 throw new SocketException (error);
2445 public void SetSocketOption (SocketOptionLevel optionLevel, SocketOptionName optionName, bool optionValue)
2447 int int_val = optionValue ? 1 : 0;
2449 SetSocketOption (optionLevel, optionName, int_val);
2452 public void SetSocketOption (SocketOptionLevel optionLevel, SocketOptionName optionName, int optionValue)
2454 ThrowIfDisposedAndClosed ();
2457 SetSocketOption_internal (m_Handle, optionLevel, optionName, null, null, optionValue, out error);
2460 if (error == (int) SocketError.InvalidArgument)
2461 throw new ArgumentException ();
2462 throw new SocketException (error);
2466 static void SetSocketOption_internal (SafeSocketHandle safeHandle, SocketOptionLevel level, SocketOptionName name, object obj_val, byte [] byte_val, int int_val, out int error)
2468 bool release = false;
2470 safeHandle.DangerousAddRef (ref release);
2471 SetSocketOption_internal (safeHandle.DangerousGetHandle (), level, name, obj_val, byte_val, int_val, out error);
2474 safeHandle.DangerousRelease ();
2478 [MethodImplAttribute(MethodImplOptions.InternalCall)]
2479 extern static void SetSocketOption_internal (IntPtr socket, SocketOptionLevel level, SocketOptionName name, object obj_val, byte [] byte_val, int int_val, out int error);
2485 public int IOControl (int ioControlCode, byte [] optionInValue, byte [] optionOutValue)
2488 throw new ObjectDisposedException (GetType ().ToString ());
2491 int result = IOControl_internal (m_Handle, ioControlCode, optionInValue, optionOutValue, out error);
2494 throw new SocketException (error);
2496 throw new InvalidOperationException ("Must use Blocking property instead.");
2501 static int IOControl_internal (SafeSocketHandle safeHandle, int ioctl_code, byte [] input, byte [] output, out int error)
2503 bool release = false;
2505 safeHandle.DangerousAddRef (ref release);
2506 return IOControl_internal (safeHandle.DangerousGetHandle (), ioctl_code, input, output, out error);
2509 safeHandle.DangerousRelease ();
2513 /* See Socket.IOControl, WSAIoctl documentation in MSDN. The common options between UNIX
2514 * and Winsock are FIONREAD, FIONBIO and SIOCATMARK. Anything else will depend on the system
2515 * except SIO_KEEPALIVE_VALS which is properly handled on both windows and linux. */
2516 [MethodImplAttribute(MethodImplOptions.InternalCall)]
2517 extern static int IOControl_internal (IntPtr sock, int ioctl_code, byte [] input, byte [] output, out int error);
2523 public void Close ()
2529 public void Close (int timeout)
2531 linger_timeout = timeout;
2535 [MethodImplAttribute(MethodImplOptions.InternalCall)]
2536 internal extern static void Close_internal (IntPtr socket, out int error);
2542 public void Shutdown (SocketShutdown how)
2544 ThrowIfDisposedAndClosed ();
2547 throw new SocketException (10057); // Not connected
2550 Shutdown_internal (m_Handle, how, out error);
2553 throw new SocketException (error);
2556 static void Shutdown_internal (SafeSocketHandle safeHandle, SocketShutdown how, out int error)
2558 bool release = false;
2560 safeHandle.DangerousAddRef (ref release);
2561 Shutdown_internal (safeHandle.DangerousGetHandle (), how, out error);
2564 safeHandle.DangerousRelease ();
2568 [MethodImplAttribute (MethodImplOptions.InternalCall)]
2569 internal extern static void Shutdown_internal (IntPtr socket, SocketShutdown how, out int error);
2575 protected virtual void Dispose (bool disposing)
2581 bool was_connected = is_connected;
2582 is_connected = false;
2584 if (m_Handle != null) {
2591 m_Handle.Dispose ();
2595 void Linger (IntPtr handle)
2597 if (!is_connected || linger_timeout <= 0)
2600 /* We don't want to receive any more data */
2602 Shutdown_internal (handle, SocketShutdown.Receive, out error);
2607 int seconds = linger_timeout / 1000;
2608 int ms = linger_timeout % 1000;
2610 /* If the other end closes, this will return 'true' with 'Available' == 0 */
2611 Poll_internal (handle, SelectMode.SelectRead, ms * 1000, out error);
2617 LingerOption linger = new LingerOption (true, seconds);
2618 SetSocketOption_internal (handle, SocketOptionLevel.Socket, SocketOptionName.Linger, linger, null, 0, out error);
2619 /* Not needed, we're closing upon return */
2627 void ThrowIfDisposedAndClosed (Socket socket)
2629 if (socket.CleanedUp && socket.is_closed)
2630 throw new ObjectDisposedException (socket.GetType ().ToString ());
2633 void ThrowIfDisposedAndClosed ()
2635 if (CleanedUp && is_closed)
2636 throw new ObjectDisposedException (GetType ().ToString ());
2639 void ThrowIfBufferNull (byte[] buffer)
2642 throw new ArgumentNullException ("buffer");
2645 void ThrowIfBufferOutOfRange (byte[] buffer, int offset, int size)
2648 throw new ArgumentOutOfRangeException ("offset", "offset must be >= 0");
2649 if (offset > buffer.Length)
2650 throw new ArgumentOutOfRangeException ("offset", "offset must be <= buffer.Length");
2652 throw new ArgumentOutOfRangeException ("size", "size must be >= 0");
2653 if (size > buffer.Length - offset)
2654 throw new ArgumentOutOfRangeException ("size", "size must be <= buffer.Length - offset");
2659 if (protocolType == ProtocolType.Udp)
2660 throw new SocketException ((int)SocketError.ProtocolOption);
2663 SocketAsyncResult ValidateEndIAsyncResult (IAsyncResult ares, string methodName, string argName)
2666 throw new ArgumentNullException (argName);
2668 SocketAsyncResult sockares = ares as SocketAsyncResult;
2669 if (sockares == null)
2670 throw new ArgumentException ("Invalid IAsyncResult", argName);
2671 if (Interlocked.CompareExchange (ref sockares.EndCalled, 1, 0) == 1)
2672 throw new InvalidOperationException (methodName + " can only be called once per asynchronous operation");
2677 void QueueIOSelectorJob (SemaphoreSlim sem, IntPtr handle, IOSelectorJob job)
2679 sem.WaitAsync ().ContinueWith (t => {
2681 job.MarkDisposed ();
2685 IOSelector.Add (handle, job);
2689 void InitSocketAsyncEventArgs (SocketAsyncEventArgs e, AsyncCallback callback, object state, SocketOperation operation)
2691 e.socket_async_result.Init (this, callback, state, operation);
2692 if (e.AcceptSocket != null) {
2693 e.socket_async_result.AcceptSocket = e.AcceptSocket;
2695 e.current_socket = this;
2696 e.SetLastOperation (SocketOperationToSocketAsyncOperation (operation));
2697 e.SocketError = SocketError.Success;
2698 e.BytesTransferred = 0;
2701 SocketAsyncOperation SocketOperationToSocketAsyncOperation (SocketOperation op)
2704 case SocketOperation.Connect:
2705 return SocketAsyncOperation.Connect;
2706 case SocketOperation.Accept:
2707 return SocketAsyncOperation.Accept;
2708 case SocketOperation.Disconnect:
2709 return SocketAsyncOperation.Disconnect;
2710 case SocketOperation.Receive:
2711 case SocketOperation.ReceiveGeneric:
2712 return SocketAsyncOperation.Receive;
2713 case SocketOperation.ReceiveFrom:
2714 return SocketAsyncOperation.ReceiveFrom;
2715 case SocketOperation.Send:
2716 case SocketOperation.SendGeneric:
2717 return SocketAsyncOperation.Send;
2718 case SocketOperation.SendTo:
2719 return SocketAsyncOperation.SendTo;
2721 throw new NotImplementedException (String.Format ("Operation {0} is not implemented", op));
2725 IPEndPoint RemapIPEndPoint (IPEndPoint input) {
2726 // If socket is DualMode ensure we automatically handle mapping IPv4 addresses to IPv6.
2727 if (IsDualMode && input.AddressFamily == AddressFamily.InterNetwork)
2728 return new IPEndPoint (input.Address.MapToIPv6 (), input.Port);
2733 [StructLayout (LayoutKind.Sequential)]
2739 [MethodImplAttribute(MethodImplOptions.InternalCall)]
2740 internal static extern void cancel_blocking_socket_operation (Thread thread);
2742 [MethodImplAttribute(MethodImplOptions.InternalCall)]
2743 internal static extern bool SupportsPortReuse (ProtocolType proto);
2745 internal static int FamilyHint {
2748 // MONO_HINT_UNSPECIFIED = 0,
2749 // MONO_HINT_IPV4 = 1,
2750 // MONO_HINT_IPV6 = 2,
2753 if (OSSupportsIPv4) {
2757 if (OSSupportsIPv6) {
2758 hint = hint == 0 ? 2 : 0;
2765 static bool IsProtocolSupported (NetworkInterfaceComponent networkInterface)
2770 var nics = NetworkInterface.GetAllNetworkInterfaces ();
2771 foreach (var adapter in nics) {
2772 if (adapter.Supports (networkInterface))