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using System; |
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using System.Collections.Generic; |
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using System.Linq; |
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using System.Net.Sockets; |
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using System.Runtime.InteropServices; |
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using System.Text; |
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using System.Threading.Tasks; |
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|
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namespace TELTest { |
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public static class SocketExtensions { |
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public static void SetSocketKeepAliveValues(this Socket instance, int KeepAliveTime, int KeepAliveInterval) { |
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//KeepAliveTime: default value is 2hr |
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//KeepAliveInterval: default value is 1s and Detect 5 times |
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|
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//the native structure |
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//struct tcp_keepalive { |
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//ULONG onoff; |
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//ULONG keepalivetime; |
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//ULONG keepaliveinterval; |
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//}; |
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|
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int size = Marshal.SizeOf(new uint()); |
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byte[] inOptionValues = new byte[size * 3]; // 4 * 3 = 12 |
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bool OnOff = true; |
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|
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BitConverter.GetBytes((uint)(OnOff ? 1 : 0)).CopyTo(inOptionValues, 0); |
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BitConverter.GetBytes((uint)KeepAliveTime).CopyTo(inOptionValues, size); |
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BitConverter.GetBytes((uint)KeepAliveInterval).CopyTo(inOptionValues, size * 2); |
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|
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instance.IOControl(IOControlCode.KeepAliveValues, inOptionValues, null); |
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} |
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} |
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} |
