Cs udpsocket (#8498)

* Fixed error when specified 0.0.0.0

* Allow subclass disable abstract constructor behavior

* UdpSocket support for C#

* Catch EOF exception, return -1 instead

* fix the messed up

* fix incompatible visibility for init

Co-authored-by: Tiger <[email protected]>

std/cs/_std/sys/net/Host.hx

@@ -45,11 +45,18 @@ class Host {
 
 	public function new(name:String):Void {
 		host = name;
-		hostEntry = Dns.GetHostEntry(name);
-		for (i in 0...hostEntry.AddressList.Length) {
-			if (hostEntry.AddressList[i].AddressFamily == InterNetwork) {
-				ipAddress = hostEntry.AddressList[i];
-				break;
+		try{
+			hostEntry = Dns.GetHostEntry(host);
+			for (i in 0...hostEntry.AddressList.Length) {
+				if (hostEntry.AddressList[i].AddressFamily == InterNetwork) {
+					ipAddress = hostEntry.AddressList[i];
+					break;
+				}
+			}
+		}catch (e:Dynamic){
+			ipAddress = IPAddress.Any;
+			if (!IPAddress.TryParse(host, ipAddress)){
+				throw "Unknown host.";
 			}
 		}
 	}

std/cs/_std/sys/net/Socket.hx

@@ -33,6 +33,7 @@ import cs.system.net.sockets.SocketShutdown;
 import cs.system.net.sockets.SocketType;
 import cs.system.threading.Thread;
 import cs.system.net.sockets.Socket in NativeSocket;
+import cs.types.UInt8;
 import haxe.io.Bytes;
 import haxe.io.Error;
 import haxe.io.Input;
@@ -48,7 +49,14 @@ class Socket {
 
 	public var custom:Dynamic;
 
+	/**
+		Creates a new unconnected socket.
+	**/
 	public function new():Void {
+		init();
+	}
+
+	private function init():Void {
 		sock = new NativeSocket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
 		sock.Blocking = true;
 	}

std/cs/_std/sys/net/UdpSocket.hx

@@ -0,0 +1,99 @@
+/*
+ * Copyright (C)2005-2019 Haxe Foundation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+package sys.net;
+
+import haxe.extern.Rest;
+import sys.net.Socket;
+import cs.NativeArray;
+import cs.system.collections.ArrayList;
+import cs.system.net.IPEndPoint;
+import cs.system.net.EndPoint;
+import cs.system.net.IPAddress;
+import cs.system.net.sockets.AddressFamily;
+import cs.system.net.sockets.NetworkStream;
+import cs.system.net.sockets.ProtocolType;
+import cs.system.net.sockets.SocketFlags;
+import cs.system.net.sockets.SocketShutdown;
+import cs.system.net.sockets.SocketType;
+import cs.system.threading.Thread;
+import cs.system.net.sockets.Socket in NativeSocket;
+import cs.types.UInt8;
+import cs.Ref;
+import haxe.io.Bytes;
+import haxe.io.Error;
+import haxe.io.Input;
+import haxe.io.Output;
+
+@:coreapi
+class UdpSocket extends Socket {
+	public function new() {
+		super();
+	}
+
+	override private function init():Void {
+		sock = new NativeSocket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
+	}
+
+	override public function bind(host:Host, port:Int):Void {
+		sock = new NativeSocket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
+		var endpoint:IPEndPoint = new IPEndPoint(host.ipAddress, port);
+		sock.Bind(endpoint);
+	}
+
+	public function sendTo(buf:haxe.io.Bytes, pos:Int, len:Int, addr:Address):Int {
+		var data = new NativeArray<UInt8>(len);
+		var indices:NativeArray<Int>;
+		for (i in 0...len) {
+			indices = NativeArray.make(i);
+			data.SetValue(cast buf.get(pos + i), indices);
+		}
+		var host = addr.getHost();
+		var ip:IPAddress = IPAddress.Parse(host.toString());
+		var endpoint:IPEndPoint = new IPEndPoint(ip, addr.port);
+		return this.sock.SendTo(data, endpoint);
+	}
+
+	public function readFrom(buf:haxe.io.Bytes, pos:Int, len:Int, addr:Address):Int {
+		var endpoint:EndPoint = cast new IPEndPoint(IPAddress.Any, 0);
+		var data:NativeArray<UInt8> = new NativeArray(len);
+		var length:Int = -1;
+		try {
+			length = this.sock.ReceiveFrom(data, endpoint);
+		} catch (e:Dynamic) {
+			return length;
+		}
+		var ipEndpoint:IPEndPoint = cast endpoint;
+		addr.host = ipEndpoint.Address.Address.high;
+		addr.port = ipEndpoint.Port;
+		var i:Int = 0;
+		for (each in data.iterator()) {
+			buf.set(pos + i, each);
+			i += 1;
+		}
+		return length;
+	}
+
+	public function setBroadcast(b:Bool):Void {
+		sock.EnableBroadcast = b;
+	}
+}