原文链接: how-do-i-close-a-socket-ipv4-and-ipv6-connection-on-windows-from-any-process
c# 代码
`using System;
using System.Net;
using System.Net.Sockets;
using System.Runtime.InteropServices;
// add 2.0.0 version as nuget package
using DigitalRuby.IPBanCore;
namespace YourNamespace;
///
/// Socket closer interface
///
public interface ISocketCloser
{
///
/// Close a socket using low level windows API. Handles ipv4 and ipv6.
///
/// Local end point
/// Remote end point
///
bool CloseSocket(IPEndPoint local, IPEndPoint remote);
}
///
/// Close sockets on Windows or Linux
///
public partial class SocketCloser : ISocketCloser
{
private const int MIB_TCP_STATE_DELETE_TCB = 12;
private static readonly byte[] moduleId = [0x18, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x03, 0x4A, 0x00, 0xEB, 0x1A, 0x9B, 0xD4, 0x11, 0x91, 0x23, 0x00, 0x50, 0x04, 0x77, 0x59, 0xBC];
private static readonly IntPtr moduleIdPtr;[LibraryImport("iphlpapi.dll", SetLastError = true)]
private static partial uint SetTcpEntry(ref MIB_TCPROW pTcpRow);[LibraryImport("nsi.dll", SetLastError = true)]
private static partial uint NsiSetAllParameters(uint action, uint flags, IntPtr moduleId, uint operation, IntPtr buffer, uint bufferLength, IntPtr metric, uint metricLength);[StructLayout(LayoutKind.Sequential)]
private struct MIB_TCPROW
{public uint dwState;public uint dwLocalAddr;public uint dwLocalPort;public uint dwRemoteAddr;public uint dwRemotePort;
}[StructLayout(LayoutKind.Sequential)]
private struct KillTcpSocketData_V6
{public ushort wLocalAddressFamily;public ushort wLocalPort;public uint bReserved1;[MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]public byte[] bLocal;public uint dwLocalScopeID;public ushort wRemoteAddressFamily;public ushort wRemotePort;public uint bReserved2;[MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]public byte[] bRemote;public uint dwRemoteScopeID;
};static SocketCloser()
{moduleIdPtr = Marshal.AllocHGlobal(moduleId.Length);Marshal.Copy(moduleId, 0, moduleIdPtr, moduleId.Length);
}/// <inheritdoc />
public bool CloseSocket(IPEndPoint local, IPEndPoint remote)
{if (OSUtility.IsLinux){return CloseSocketLinux(local, remote);}else if (OSUtility.IsWindows){return CloseSocketWindows(local, remote);}return false;
}private static bool CloseSocketLinux(IPEndPoint local, IPEndPoint remote)
{// sudo ss --kill state all src IP_ADDRESS:PORT dst IP_ADDRESS:PORTstring command = $"ss --kill state all src \"{local.Address}:{local.Port}\" dst \"{remote.Address}:{remote.Port}\"";OSUtility.StartProcessAndWait("sudo", command, 0);return true;
}
private static bool CloseSocketWindows(IPEndPoint local, IPEndPoint remote)
{var localPortFixed = (ushort)IPAddress.HostToNetworkOrder((short)local.Port);var remotePortFixed = (ushort)IPAddress.HostToNetworkOrder((short)remote.Port);if (local.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork){MIB_TCPROW row = new(){dwState = MIB_TCP_STATE_DELETE_TCB,dwLocalAddr = local.Address.ToUInt32(false),dwLocalPort = (uint)localPortFixed,dwRemoteAddr = remote.Address.ToUInt32(false),dwRemotePort = (uint)remotePortFixed};var result = SetTcpEntry(ref row);return result == 0 || result == 317;}else if (local.AddressFamily == System.Net.Sockets.AddressFamily.InterNetworkV6){KillTcpSocketData_V6 row6 = new(){wLocalAddressFamily = (ushort)AddressFamily.InterNetworkV6,wLocalPort = localPortFixed,bLocal = local.Address.GetAddressBytes(),bRemote = remote.Address.GetAddressBytes(),bReserved1 = 0,bReserved2 = 0,dwLocalScopeID = (uint)IPAddress.HostToNetworkOrder(local.Address.ScopeId),dwRemoteScopeID = (uint)IPAddress.HostToNetworkOrder(remote.Address.ScopeId),wRemoteAddressFamily = (ushort)AddressFamily.InterNetworkV6,wRemotePort = remotePortFixed};// Assume global module ID and other parameters are correctly setvar ptrSize = Marshal.SizeOf<KillTcpSocketData_V6>();var ptr = Marshal.AllocHGlobal(ptrSize);try{// Call the undocumented API (the values for module ID, etc., must be correct)Marshal.StructureToPtr(row6, ptr, false);var result = NsiSetAllParameters(1, 2, moduleIdPtr, 16, ptr, (uint)ptrSize, IntPtr.Zero, 0);return result == 0 || result == 317;}finally{// CleanupMarshal.FreeHGlobal(ptr);}}return false;
}
}`