trunk/TELTest/SocketExtensions.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Sockets;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

namespace TELTest {
    public static class SocketExtensions {
        public static void SetSocketKeepAliveValues(this Socket instance, int KeepAliveTime, int KeepAliveInterval) {
            //KeepAliveTime: default value is 2hr
            //KeepAliveInterval: default value is 1s and Detect 5 times

            //the native structure
            //struct tcp_keepalive {
            //ULONG onoff;
            //ULONG keepalivetime;
            //ULONG keepaliveinterval;
            //};

            int size = Marshal.SizeOf(new uint());
            byte[] inOptionValues = new byte[size * 3]; // 4 * 3 = 12
            bool OnOff = true;

            BitConverter.GetBytes((uint)(OnOff ? 1 : 0)).CopyTo(inOptionValues, 0);
            BitConverter.GetBytes((uint)KeepAliveTime).CopyTo(inOptionValues, size);
            BitConverter.GetBytes((uint)KeepAliveInterval).CopyTo(inOptionValues, size * 2);

            instance.IOControl(IOControlCode.KeepAliveValues, inOptionValues, null);
        }
    }
}
Revision:	2
Committed:	Wed Feb 11 13:07:01 2026 UTC (8 weeks, 4 days ago) by figdor32
File size:	1231 byte(s)
Log Message:	Initial check-in
#	User	Rev	Content
1	figdor32	2	using System;
2			using System.Collections.Generic;
3			using System.Linq;
4			using System.Net.Sockets;
5			using System.Runtime.InteropServices;
6			using System.Text;
7			using System.Threading.Tasks;
8
9			namespace TELTest {
10			public static class SocketExtensions {
11			public static void SetSocketKeepAliveValues(this Socket instance, int KeepAliveTime, int KeepAliveInterval) {
12			//KeepAliveTime: default value is 2hr
13			//KeepAliveInterval: default value is 1s and Detect 5 times
14
15			//the native structure
16			//struct tcp_keepalive {
17			//ULONG onoff;
18			//ULONG keepalivetime;
19			//ULONG keepaliveinterval;
20			//};
21
22			int size = Marshal.SizeOf(new uint());
23			byte[] inOptionValues = new byte[size * 3]; // 4 * 3 = 12
24			bool OnOff = true;
25
26			BitConverter.GetBytes((uint)(OnOff ? 1 : 0)).CopyTo(inOptionValues, 0);
27			BitConverter.GetBytes((uint)KeepAliveTime).CopyTo(inOptionValues, size);
28			BitConverter.GetBytes((uint)KeepAliveInterval).CopyTo(inOptionValues, size * 2);
29
30			instance.IOControl(IOControlCode.KeepAliveValues, inOptionValues, null);
31			}
32			}
33			}