Nó hoạt động với tôi ... và sẽ nhanh hơn trong hầu hết các trường hợp (nếu không phải tất cả) so với truy vấn máy chủ DNS. Cảm ơn Thực tập sinh của Tiến sĩ Wily ( tại đây ).
// ************************************************************************
/// <summary>
/// Will search for the an active NetworkInterafce that has a Gateway, otherwise
/// it will fallback to try from the DNS which is not safe.
/// </summary>
/// <returns></returns>
public static NetworkInterface GetMainNetworkInterface()
{
List<NetworkInterface> candidates = new List<NetworkInterface>();
if (NetworkInterface.GetIsNetworkAvailable())
{
NetworkInterface[] NetworkInterfaces =
NetworkInterface.GetAllNetworkInterfaces();
foreach (
NetworkInterface ni in NetworkInterfaces)
{
if (ni.OperationalStatus == OperationalStatus.Up)
candidates.Add(ni);
}
}
if (candidates.Count == 1)
{
return candidates[0];
}
// Accoring to our tech, the main NetworkInterface should have a Gateway
// and it should be the ony one with a gateway.
if (candidates.Count > 1)
{
for (int n = candidates.Count - 1; n >= 0; n--)
{
if (candidates[n].GetIPProperties().GatewayAddresses.Count == 0)
{
candidates.RemoveAt(n);
}
}
if (candidates.Count == 1)
{
return candidates[0];
}
}
// Fallback to try by getting my ipAdress from the dns
IPAddress myMainIpAdress = null;
IPHostEntry host = Dns.GetHostEntry(Dns.GetHostName());
foreach (IPAddress ip in host.AddressList)
{
if (ip.AddressFamily == AddressFamily.InterNetwork) // Get the first IpV4
{
myMainIpAdress = ip;
break;
}
}
if (myMainIpAdress != null)
{
NetworkInterface[] NetworkInterfaces =
NetworkInterface.GetAllNetworkInterfaces();
foreach (NetworkInterface ni in NetworkInterfaces)
{
if (ni.OperationalStatus == OperationalStatus.Up)
{
IPInterfaceProperties props = ni.GetIPProperties();
foreach (UnicastIPAddressInformation ai in props.UnicastAddresses)
{
if (ai.Address.Equals(myMainIpAdress))
{
return ni;
}
}
}
}
}
return null;
}
// ******************************************************************
/// <summary>
/// AddressFamily.InterNetwork = IPv4
/// Thanks to Dr. Wilys Apprentice at
/// http://stackoverflow.com/questions/1069103/how-to-get-the-ip-address-of-the-server-on-which-my-c-sharp-application-is-runni
/// using System.Net.NetworkInformation;
/// </summary>
/// <param name="mac"></param>
/// <param name="addressFamily">AddressFamily.InterNetwork = IPv4, AddressFamily.InterNetworkV6 = IPv6</param>
/// <returns></returns>
public static IPAddress GetIpFromMac(PhysicalAddress mac, AddressFamily addressFamily = AddressFamily.InterNetwork)
{
NetworkInterface[] NetworkInterfaces =
NetworkInterface.GetAllNetworkInterfaces();
foreach (NetworkInterface ni in NetworkInterfaces)
{
if (ni.GetPhysicalAddress().Equals(mac))
{
if (ni.OperationalStatus == OperationalStatus.Up)
{
IPInterfaceProperties props = ni.GetIPProperties();
foreach (UnicastIPAddressInformation ai in props.UnicastAddresses)
{
if (ai.DuplicateAddressDetectionState == DuplicateAddressDetectionState.Preferred)
{
if (ai.Address.AddressFamily == addressFamily)
{
return ai.Address;
}
}
}
}
}
}
return null;
}
// ******************************************************************
/// <summary>
/// Return the best guess of main ipAdress. To get it in the form aaa.bbb.ccc.ddd just call
/// '?.ToString() ?? ""' on the result.
/// </summary>
/// <returns></returns>
public static IPAddress GetMyInternetIpAddress()
{
NetworkInterface ni = GetMainNetworkInterface();
IPAddress ipAddress = GetIpFromMac(ni.GetPhysicalAddress());
if (ipAddress == null) // could it be possible ?
{
ipAddress = GetIpFromMac(ni.GetPhysicalAddress(), AddressFamily.InterNetworkV6);
}
return ipAddress;
}
// ******************************************************************
Cũng như tham chiếu, đây là mã lớp đầy đủ nơi tôi đã định nghĩa nó:
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Net;
using System.Net.NetworkInformation;
using System.Net.Sockets;
using System.Runtime.InteropServices;
using System.Threading.Tasks;
namespace TcpMonitor
{
/*
Usage:
var cons = TcpHelper.GetAllTCPConnections();
foreach (TcpHelper.MIB_TCPROW_OWNER_PID c in cons) ...
*/
public class NetHelper
{
[DllImport("iphlpapi.dll", SetLastError = true)]
static extern uint GetExtendedUdpTable(IntPtr pUdpTable, ref int dwOutBufLen, bool sort, int ipVersion, UDP_TABLE_CLASS tblClass, uint reserved = 0);
public enum UDP_TABLE_CLASS
{
UDP_TABLE_BASIC,
UDP_TABLE_OWNER_PID,
UDP_TABLE_OWNER_MODULE
}
[StructLayout(LayoutKind.Sequential)]
public struct MIB_UDPTABLE_OWNER_PID
{
public uint dwNumEntries;
[MarshalAs(UnmanagedType.ByValArray, ArraySubType = UnmanagedType.Struct, SizeConst = 1)]
public MIB_UDPROW_OWNER_PID[] table;
}
[StructLayout(LayoutKind.Sequential)]
public struct MIB_UDPROW_OWNER_PID
{
public uint localAddr;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 4)]
public byte[] localPort;
public uint owningPid;
public uint ProcessId
{
get { return owningPid; }
}
public IPAddress LocalAddress
{
get { return new IPAddress(localAddr); }
}
public ushort LocalPort
{
get { return BitConverter.ToUInt16(localPort.Take(2).Reverse().ToArray(), 0); }
}
}
[StructLayout(LayoutKind.Sequential)]
public struct MIB_UDP6TABLE_OWNER_PID
{
public uint dwNumEntries;
[MarshalAs(UnmanagedType.ByValArray, ArraySubType = UnmanagedType.Struct, SizeConst = 1)]
public MIB_UDP6ROW_OWNER_PID[] table;
}
[StructLayout(LayoutKind.Sequential)]
public struct MIB_UDP6ROW_OWNER_PID
{
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
public byte[] localAddr;
public uint localScopeId;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 4)]
public byte[] localPort;
public uint owningPid;
public uint ProcessId
{
get { return owningPid; }
}
public IPAddress LocalAddress
{
get { return new IPAddress(localAddr, localScopeId); }
}
public ushort LocalPort
{
get { return BitConverter.ToUInt16(localPort.Take(2).Reverse().ToArray(), 0); }
}
}
public static List<MIB_UDPROW_OWNER_PID> GetAllUDPConnections()
{
return GetUDPConnections<MIB_UDPROW_OWNER_PID, MIB_UDPTABLE_OWNER_PID> (AF_INET);
}
public static List<MIB_UDP6ROW_OWNER_PID> GetAllUDPv6Connections()
{
return GetUDPConnections<MIB_UDP6ROW_OWNER_PID, MIB_UDP6TABLE_OWNER_PID>(AF_INET6);
}
private static List<IPR> GetUDPConnections<IPR, IPT>(int ipVersion)//IPR = Row Type, IPT = Table Type
{
List<IPR> result = null;
IPR[] tableRows = null;
int buffSize = 0;
var dwNumEntriesField = typeof(IPT).GetField("dwNumEntries");
// how much memory do we need?
uint ret = GetExtendedUdpTable(IntPtr.Zero, ref buffSize, true, ipVersion, UDP_TABLE_CLASS.UDP_TABLE_OWNER_PID);
IntPtr udpTablePtr = Marshal.AllocHGlobal(buffSize);
try
{
ret = GetExtendedUdpTable(udpTablePtr, ref buffSize, true, ipVersion, UDP_TABLE_CLASS.UDP_TABLE_OWNER_PID);
if (ret != 0)
return new List<IPR>();
// get the number of entries in the table
IPT table = (IPT)Marshal.PtrToStructure(udpTablePtr, typeof(IPT));
int rowStructSize = Marshal.SizeOf(typeof(IPR));
uint numEntries = (uint)dwNumEntriesField.GetValue(table);
// buffer we will be returning
tableRows = new IPR[numEntries];
IntPtr rowPtr = (IntPtr)((long)udpTablePtr + 4);
for (int i = 0; i < numEntries; i++)
{
IPR tcpRow = (IPR)Marshal.PtrToStructure(rowPtr, typeof(IPR));
tableRows[i] = tcpRow;
rowPtr = (IntPtr)((long)rowPtr + rowStructSize); // next entry
}
}
finally
{
result = tableRows?.ToList() ?? new List<IPR>();
// Free the Memory
Marshal.FreeHGlobal(udpTablePtr);
}
return result;
}
[DllImport("iphlpapi.dll", SetLastError = true)]
static extern uint GetExtendedTcpTable(IntPtr pTcpTable, ref int dwOutBufLen, bool sort, int ipVersion, TCP_TABLE_CLASS tblClass, uint reserved = 0);
public enum MIB_TCP_STATE
{
MIB_TCP_STATE_CLOSED = 1,
MIB_TCP_STATE_LISTEN = 2,
MIB_TCP_STATE_SYN_SENT = 3,
MIB_TCP_STATE_SYN_RCVD = 4,
MIB_TCP_STATE_ESTAB = 5,
MIB_TCP_STATE_FIN_WAIT1 = 6,
MIB_TCP_STATE_FIN_WAIT2 = 7,
MIB_TCP_STATE_CLOSE_WAIT = 8,
MIB_TCP_STATE_CLOSING = 9,
MIB_TCP_STATE_LAST_ACK = 10,
MIB_TCP_STATE_TIME_WAIT = 11,
MIB_TCP_STATE_DELETE_TCB = 12
}
public enum TCP_TABLE_CLASS
{
TCP_TABLE_BASIC_LISTENER,
TCP_TABLE_BASIC_CONNECTIONS,
TCP_TABLE_BASIC_ALL,
TCP_TABLE_OWNER_PID_LISTENER,
TCP_TABLE_OWNER_PID_CONNECTIONS,
TCP_TABLE_OWNER_PID_ALL,
TCP_TABLE_OWNER_MODULE_LISTENER,
TCP_TABLE_OWNER_MODULE_CONNECTIONS,
TCP_TABLE_OWNER_MODULE_ALL
}
[StructLayout(LayoutKind.Sequential)]
public struct MIB_TCPTABLE_OWNER_PID
{
public uint dwNumEntries;
[MarshalAs(UnmanagedType.ByValArray, ArraySubType = UnmanagedType.Struct, SizeConst = 1)]
public MIB_TCPROW_OWNER_PID[] table;
}
[StructLayout(LayoutKind.Sequential)]
public struct MIB_TCP6TABLE_OWNER_PID
{
public uint dwNumEntries;
[MarshalAs(UnmanagedType.ByValArray, ArraySubType = UnmanagedType.Struct, SizeConst = 1)]
public MIB_TCP6ROW_OWNER_PID[] table;
}
[StructLayout(LayoutKind.Sequential)]
public struct MIB_TCPROW_OWNER_PID
{
public uint state;
public uint localAddr;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 4)]
public byte[] localPort;
public uint remoteAddr;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 4)]
public byte[] remotePort;
public uint owningPid;
public uint ProcessId
{
get { return owningPid; }
}
public IPAddress LocalAddress
{
get { return new IPAddress(localAddr); }
}
public ushort LocalPort
{
get
{
return BitConverter.ToUInt16(new byte[2] { localPort[1], localPort[0] }, 0);
}
}
public IPAddress RemoteAddress
{
get { return new IPAddress(remoteAddr); }
}
public ushort RemotePort
{
get
{
return BitConverter.ToUInt16(new byte[2] { remotePort[1], remotePort[0] }, 0);
}
}
public MIB_TCP_STATE State
{
get { return (MIB_TCP_STATE)state; }
}
}
[StructLayout(LayoutKind.Sequential)]
public struct MIB_TCP6ROW_OWNER_PID
{
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
public byte[] localAddr;
public uint localScopeId;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 4)]
public byte[] localPort;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
public byte[] remoteAddr;
public uint remoteScopeId;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 4)]
public byte[] remotePort;
public uint state;
public uint owningPid;
public uint ProcessId
{
get { return owningPid; }
}
public long LocalScopeId
{
get { return localScopeId; }
}
public IPAddress LocalAddress
{
get { return new IPAddress(localAddr, LocalScopeId); }
}
public ushort LocalPort
{
get { return BitConverter.ToUInt16(localPort.Take(2).Reverse().ToArray(), 0); }
}
public long RemoteScopeId
{
get { return remoteScopeId; }
}
public IPAddress RemoteAddress
{
get { return new IPAddress(remoteAddr, RemoteScopeId); }
}
public ushort RemotePort
{
get { return BitConverter.ToUInt16(remotePort.Take(2).Reverse().ToArray(), 0); }
}
public MIB_TCP_STATE State
{
get { return (MIB_TCP_STATE)state; }
}
}
public const int AF_INET = 2; // IP_v4 = System.Net.Sockets.AddressFamily.InterNetwork
public const int AF_INET6 = 23; // IP_v6 = System.Net.Sockets.AddressFamily.InterNetworkV6
public static Task<List<MIB_TCPROW_OWNER_PID>> GetAllTCPConnectionsAsync()
{
return Task.Run(() => GetTCPConnections<MIB_TCPROW_OWNER_PID, MIB_TCPTABLE_OWNER_PID>(AF_INET));
}
public static List<MIB_TCPROW_OWNER_PID> GetAllTCPConnections()
{
return GetTCPConnections<MIB_TCPROW_OWNER_PID, MIB_TCPTABLE_OWNER_PID>(AF_INET);
}
public static Task<List<MIB_TCP6ROW_OWNER_PID>> GetAllTCPv6ConnectionsAsync()
{
return Task.Run(()=>GetTCPConnections<MIB_TCP6ROW_OWNER_PID, MIB_TCP6TABLE_OWNER_PID>(AF_INET6));
}
public static List<MIB_TCP6ROW_OWNER_PID> GetAllTCPv6Connections()
{
return GetTCPConnections<MIB_TCP6ROW_OWNER_PID, MIB_TCP6TABLE_OWNER_PID>(AF_INET6);
}
private static List<IPR> GetTCPConnections<IPR, IPT>(int ipVersion)//IPR = Row Type, IPT = Table Type
{
List<IPR> result = null;
IPR[] tableRows = null;
int buffSize = 0;
var dwNumEntriesField = typeof(IPT).GetField("dwNumEntries");
// how much memory do we need?
uint ret = GetExtendedTcpTable(IntPtr.Zero, ref buffSize, true, ipVersion, TCP_TABLE_CLASS.TCP_TABLE_OWNER_PID_ALL);
IntPtr tcpTablePtr = Marshal.AllocHGlobal(buffSize);
try
{
ret = GetExtendedTcpTable(tcpTablePtr, ref buffSize, true, ipVersion, TCP_TABLE_CLASS.TCP_TABLE_OWNER_PID_ALL);
if (ret != 0)
return new List<IPR>();
// get the number of entries in the table
IPT table = (IPT)Marshal.PtrToStructure(tcpTablePtr, typeof(IPT));
int rowStructSize = Marshal.SizeOf(typeof(IPR));
uint numEntries = (uint)dwNumEntriesField.GetValue(table);
// buffer we will be returning
tableRows = new IPR[numEntries];
IntPtr rowPtr = (IntPtr)((long)tcpTablePtr + 4);
for (int i = 0; i < numEntries; i++)
{
IPR tcpRow = (IPR)Marshal.PtrToStructure(rowPtr, typeof(IPR));
tableRows[i] = tcpRow;
rowPtr = (IntPtr)((long)rowPtr + rowStructSize); // next entry
}
}
finally
{
result = tableRows?.ToList() ?? new List<IPR>();
// Free the Memory
Marshal.FreeHGlobal(tcpTablePtr);
}
return result;
}
public static string GetTcpStateName(MIB_TCP_STATE state)
{
switch (state)
{
case MIB_TCP_STATE.MIB_TCP_STATE_CLOSED:
return "Closed";
case MIB_TCP_STATE.MIB_TCP_STATE_LISTEN:
return "Listen";
case MIB_TCP_STATE.MIB_TCP_STATE_SYN_SENT:
return "SynSent";
case MIB_TCP_STATE.MIB_TCP_STATE_SYN_RCVD:
return "SynReceived";
case MIB_TCP_STATE.MIB_TCP_STATE_ESTAB:
return "Established";
case MIB_TCP_STATE.MIB_TCP_STATE_FIN_WAIT1:
return "FinWait 1";
case MIB_TCP_STATE.MIB_TCP_STATE_FIN_WAIT2:
return "FinWait 2";
case MIB_TCP_STATE.MIB_TCP_STATE_CLOSE_WAIT:
return "CloseWait";
case MIB_TCP_STATE.MIB_TCP_STATE_CLOSING:
return "Closing";
case MIB_TCP_STATE.MIB_TCP_STATE_LAST_ACK:
return "LastAck";
case MIB_TCP_STATE.MIB_TCP_STATE_TIME_WAIT:
return "TimeWait";
case MIB_TCP_STATE.MIB_TCP_STATE_DELETE_TCB:
return "DeleteTCB";
default:
return ((int)state).ToString();
}
}
private static readonly ConcurrentDictionary<string, string> DicOfIpToHostName = new ConcurrentDictionary<string, string>();
public const string UnknownHostName = "Unknown";
// ******************************************************************
public static string GetHostName(IPAddress ipAddress)
{
return GetHostName(ipAddress.ToString());
}
// ******************************************************************
public static string GetHostName(string ipAddress)
{
string hostName = null;
if (!DicOfIpToHostName.TryGetValue(ipAddress, out hostName))
{
try
{
if (ipAddress == "0.0.0.0" || ipAddress == "::")
{
hostName = ipAddress;
}
else
{
hostName = Dns.GetHostEntry(ipAddress).HostName;
}
}
catch (Exception ex)
{
Debug.Print(ex.ToString());
hostName = UnknownHostName;
}
DicOfIpToHostName[ipAddress] = hostName;
}
return hostName;
}
// ************************************************************************
/// <summary>
/// Will search for the an active NetworkInterafce that has a Gateway, otherwise
/// it will fallback to try from the DNS which is not safe.
/// </summary>
/// <returns></returns>
public static NetworkInterface GetMainNetworkInterface()
{
List<NetworkInterface> candidates = new List<NetworkInterface>();
if (NetworkInterface.GetIsNetworkAvailable())
{
NetworkInterface[] NetworkInterfaces =
NetworkInterface.GetAllNetworkInterfaces();
foreach (
NetworkInterface ni in NetworkInterfaces)
{
if (ni.OperationalStatus == OperationalStatus.Up)
candidates.Add(ni);
}
}
if (candidates.Count == 1)
{
return candidates[0];
}
// Accoring to our tech, the main NetworkInterface should have a Gateway
// and it should be the ony one with a gateway.
if (candidates.Count > 1)
{
for (int n = candidates.Count - 1; n >= 0; n--)
{
if (candidates[n].GetIPProperties().GatewayAddresses.Count == 0)
{
candidates.RemoveAt(n);
}
}
if (candidates.Count == 1)
{
return candidates[0];
}
}
// Fallback to try by getting my ipAdress from the dns
IPAddress myMainIpAdress = null;
IPHostEntry host = Dns.GetHostEntry(Dns.GetHostName());
foreach (IPAddress ip in host.AddressList)
{
if (ip.AddressFamily == AddressFamily.InterNetwork) // Get the first IpV4
{
myMainIpAdress = ip;
break;
}
}
if (myMainIpAdress != null)
{
NetworkInterface[] NetworkInterfaces =
NetworkInterface.GetAllNetworkInterfaces();
foreach (NetworkInterface ni in NetworkInterfaces)
{
if (ni.OperationalStatus == OperationalStatus.Up)
{
IPInterfaceProperties props = ni.GetIPProperties();
foreach (UnicastIPAddressInformation ai in props.UnicastAddresses)
{
if (ai.Address.Equals(myMainIpAdress))
{
return ni;
}
}
}
}
}
return null;
}
// ******************************************************************
/// <summary>
/// AddressFamily.InterNetwork = IPv4
/// Thanks to Dr. Wilys Apprentice at
/// http://stackoverflow.com/questions/1069103/how-to-get-the-ip-address-of-the-server-on-which-my-c-sharp-application-is-runni
/// using System.Net.NetworkInformation;
/// </summary>
/// <param name="mac"></param>
/// <param name="addressFamily">AddressFamily.InterNetwork = IPv4, AddressFamily.InterNetworkV6 = IPv6</param>
/// <returns></returns>
public static IPAddress GetIpFromMac(PhysicalAddress mac, AddressFamily addressFamily = AddressFamily.InterNetwork)
{
NetworkInterface[] NetworkInterfaces =
NetworkInterface.GetAllNetworkInterfaces();
foreach (NetworkInterface ni in NetworkInterfaces)
{
if (ni.GetPhysicalAddress().Equals(mac))
{
if (ni.OperationalStatus == OperationalStatus.Up)
{
IPInterfaceProperties props = ni.GetIPProperties();
foreach (UnicastIPAddressInformation ai in props.UnicastAddresses)
{
if (ai.DuplicateAddressDetectionState == DuplicateAddressDetectionState.Preferred)
{
if (ai.Address.AddressFamily == addressFamily)
{
return ai.Address;
}
}
}
}
}
}
return null;
}
// ******************************************************************
/// <summary>
/// Return the best guess of main ipAdress. To get it in the form aaa.bbb.ccc.ddd just call
/// '?.ToString() ?? ""' on the result.
/// </summary>
/// <returns></returns>
public static IPAddress GetMyInternetIpAddress()
{
NetworkInterface ni = GetMainNetworkInterface();
IPAddress ipAddress = GetIpFromMac(ni.GetPhysicalAddress());
if (ipAddress == null) // could it be possible ?
{
ipAddress = GetIpFromMac(ni.GetPhysicalAddress(), AddressFamily.InterNetworkV6);
}
return ipAddress;
}
// ******************************************************************
public static bool IsBroadcastAddress(IPAddress ipAddress)
{
if (ipAddress.AddressFamily == AddressFamily.InterNetwork)
{
return ipAddress.GetAddressBytes()[3] == 255;
}
if (ipAddress.AddressFamily == AddressFamily.InterNetworkV6)
{
return false; // NO broadcast in IPv6
}
return false;
}
// ******************************************************************
public static bool IsMulticastAddress(IPAddress ipAddress)
{
if (ipAddress.AddressFamily == AddressFamily.InterNetwork)
{
// Source: https://technet.microsoft.com/en-us/library/cc772041(v=ws.10).aspx
return ipAddress.GetAddressBytes()[0] >= 224 && ipAddress.GetAddressBytes()[0] <= 239;
}
if (ipAddress.AddressFamily == AddressFamily.InterNetworkV6)
{
return ipAddress.IsIPv6Multicast;
}
return false;
}
// ******************************************************************
}
}