First iteration improved multiplatform support

Lidgren.Network/Platform/PlatformAndroid.cs

@@ -0,0 +1,87 @@
+#if __ANDROID__
+using System;
+using System.Collections.Generic;
+using System.Net;
+
+namespace Lidgren.Network
+{
+	public static partial class NetUtility
+	{
+		private static byte[] s_randomMacBytes;
+		
+		static NetUtility()
+		{
+			s_randomMacBytes = new byte[8];
+			MWCRandom.Instance.NextBytes(s_randomMacBytes);
+		}
+
+		[CLSCompliant(false)]
+		public static ulong GetPlatformSeed(int seedInc)
+		{
+			ulong seed = (ulong)Environment.TickCount + (ulong)seedInc;
+			return seed ^ ((ulong)(new object().GetHashCode()) << 32);
+		}
+		
+		/// <summary>
+		/// Gets my local IPv4 address (not necessarily external) and subnet mask
+		/// </summary>
+		public static IPAddress GetMyAddress(out IPAddress mask)
+		{
+			mask = null;
+			try
+			{
+				Android.Net.Wifi.WifiManager wifi = (Android.Net.Wifi.WifiManager)Android.App.Application.Context.GetSystemService(Android.App.Activity.WifiService);
+				if (!wifi.IsWifiEnabled)
+					return null;
+
+				var dhcp = wifi.DhcpInfo;
+				int addr = dhcp.IpAddress;
+				byte[] quads = new byte[4];
+				for (int k = 0; k < 4; k++)
+					quads[k] = (byte)((addr >> k * 8) & 0xFF);
+				return new IPAddress(quads);
+			}
+			catch // Catch Access Denied errors
+			{
+				return null;
+			}
+		}
+
+		public static byte[] GetMacAddressBytes()
+		{
+			return s_randomMacBytes;
+		}
+
+		public static void Sleep(int milliseconds)
+		{
+			System.Threading.Thread.Sleep(milliseconds);
+		}
+
+		public static IPAddress GetBroadcastAddress()
+		{
+			return IPAddress.Broadcast;
+		}
+
+		public static IPAddress CreateAddressFromBytes(byte[] bytes)
+		{
+			return new IPAddress(bytes);
+		}
+
+		private static readonly SHA1 s_sha = SHA1.Create();
+		public static byte[] ComputeSHAHash(byte[] bytes, int offset, int count)
+		{
+			return s_sha.ComputeHash(bytes, offset, count);
+		}
+	}
+
+	public static partial class NetTime
+	{
+		private static readonly long s_timeInitialized = Environment.TickCount;
+		
+		/// <summary>
+		/// Get number of seconds since the application started
+		/// </summary>
+		public static double Now { get { return (double)((uint)Environment.TickCount - s_timeInitialized) / 1000.0; } }
+	}
+}
+#endif