/// <summary>
/// 获取一次Tcp端口快照信息
/// </summary>
/// <returns></returns>
public unsafe static List <TcpPort> Snapshot()
{
var portList = new List <TcpPort>();
const int AF_INET = 2;
const int TCP_TABLE_OWNER_PID_ALL = 5;
var size = 0;
TcpTable.GetExtendedTcpTable(null, &size, true, AF_INET, TCP_TABLE_OWNER_PID_ALL, 0);
byte *pTable = stackalloc byte[size];
if (TcpTable.GetExtendedTcpTable(pTable, &size, true, AF_INET, TCP_TABLE_OWNER_PID_ALL, 0) == 0)
{
var rowLength = *(int *)(pTable);
var pRow = pTable + Marshal.SizeOf(rowLength);
for (int i = 0; i < rowLength; i++)
{
var row = *(MIB_TCPROW_OWNER_PID *)pRow;
var tcpPort = TcpPort.FromTcpRow(row);
if (portList.Contains(tcpPort) == false)
{
portList.Add(tcpPort);
}
pRow = pRow + Marshal.SizeOf(typeof(MIB_TCPROW_OWNER_PID));
}
}
return(portList);
}