windows 哪个PID在c#中的给定端口上侦听
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Which PID listens on a given port in c#
提问by Philip Derbeko
What is the easiest way to get a PID that listens on a given port in C#? Basically, I want to make sure that my service is running and listens on a port I have provided it. If there is an easier way than parsing netstat output it will be great.
在 C# 中获取侦听给定端口的 PID 的最简单方法是什么？基本上，我想确保我的服务正在运行并侦听我提供的端口。如果有比解析 netstat 输出更简单的方法，那就太好了。
回答by ShuggyCoUk
from win XP SP2 onwards you can P/Invoke to GetExtendedTcpTable
从 Win XP SP2 开始，您可以 P/Invoke 到GetExtendedTcpTable
Using This person'skind work to flesh out the signature (the PInvoke.net spec is incomplete) here is a (rough and poor at error checking) example
使用此人的善举来充实签名（PInvoke.net 规范不完整）这里是一个（粗略且不擅长错误检查）示例
using System;
using System.Runtime.InteropServices;
public enum TCP_TABLE_CLASS : int
{
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_TCPROW_OWNER_PID
{
public uint state;
public uint localAddr;
public byte localPort1;
public byte localPort2;
public byte localPort3;
public byte localPort4;
public uint remoteAddr;
public byte remotePort1;
public byte remotePort2;
public byte remotePort3;
public byte remotePort4;
public int owningPid;
public ushort LocalPort
{
get
{
return BitConverter.ToUInt16(
new byte[2] { localPort2, localPort1}, 0);
}
}
public ushort RemotePort
{
get
{
return BitConverter.ToUInt16(
new byte[2] { remotePort2, remotePort1}, 0);
}
}
}
[StructLayout(LayoutKind.Sequential)]
public struct MIB_TCPTABLE_OWNER_PID
{
public uint dwNumEntries;
MIB_TCPROW_OWNER_PID table;
}
[DllImport("iphlpapi.dll", SetLastError=true)]
static extern uint GetExtendedTcpTable(IntPtr pTcpTable,
ref int dwOutBufLen,
bool sort,
int ipVersion,
TCP_TABLE_CLASS tblClass,
int reserved);
public static MIB_TCPROW_OWNER_PID[] GetAllTcpConnections()
{
MIB_TCPROW_OWNER_PID[] tTable;
int AF_INET = 2; // IP_v4
int buffSize = 0;
// how much memory do we need?
uint ret = GetExtendedTcpTable(IntPtr.Zero,
ref buffSize,
true,
AF_INET,
TCP_TABLE_CLASS.TCP_TABLE_OWNER_PID_ALL,
0);
if (ret != 0 && ret != 122) // 122 insufficient buffer size
throw new Exception("bad ret on check " + ret);
IntPtr buffTable = Marshal.AllocHGlobal(buffSize);
try
{
ret = GetExtendedTcpTable(buffTable,
ref buffSize,
true,
AF_INET,
TCP_TABLE_CLASS.TCP_TABLE_OWNER_PID_ALL,
0);
if (ret != 0)
throw new Exception("bad ret "+ ret);
// get the number of entries in the table
MIB_TCPTABLE_OWNER_PID tab =
(MIB_TCPTABLE_OWNER_PID)Marshal.PtrToStructure(
buffTable,
typeof(MIB_TCPTABLE_OWNER_PID));
IntPtr rowPtr = (IntPtr)((long)buffTable +
Marshal.SizeOf(tab.dwNumEntries));
tTable = new MIB_TCPROW_OWNER_PID[tab.dwNumEntries];
for (int i = 0; i < tab.dwNumEntries; i++)
{
MIB_TCPROW_OWNER_PID tcpRow = (MIB_TCPROW_OWNER_PID)Marshal
.PtrToStructure(rowPtr, typeof(MIB_TCPROW_OWNER_PID));
tTable[i] = tcpRow;
// next entry
rowPtr = (IntPtr)((long)rowPtr + Marshal.SizeOf(tcpRow));
}
}
finally
{
// Free the Memory
Marshal.FreeHGlobal(buffTable);
}
return tTable;
}
回答by Alex Duggleby
check out this project: http://www.codeproject.com/KB/IP/iphlpapi.aspx
看看这个项目：http: //www.codeproject.com/KB/IP/iphlpapi.aspx
It uses Interop in C# to get to the underlying GetTcpTable Win API function. And therefore can give you the process id you are looking for.
它使用 C# 中的互操作来访问底层的 GetTcpTable Win API 函数。因此可以为您提供您正在寻找的进程 ID。
hope that helps, Alex
希望有帮助，亚历克斯
