local host ip get

来源：互联网发布：电脑卡片制作软件编辑：程序博客网时间：2024/06/05 12:47

#include "winsock2.h"
#include "Iphlpapi.h"

#pragma comment(lib,"Iphlpapi.lib")

#pragma comment(lib,"ws2_32.lib")

PMIB_TCPTABLE MyGetTcpTable(BOOL bOrder)
{
     PMIB_TCPTABLE pTcpTable = NULL;
     DWORD dwActualSize = 0;

     if(::GetTcpTable(pTcpTable, &dwActualSize, bOrder) == ERROR_INSUFFICIENT_BUFFER)
     {
         pTcpTable = (PMIB_TCPTABLE)::GlobalAlloc(GPTR, dwActualSize);
         if(::GetTcpTable(pTcpTable, &dwActualSize, bOrder) == NO_ERROR)
             return pTcpTable;
         ::GlobalFree(pTcpTable);
     }
     return NULL;
}

void MyFreeTcpTable(PMIB_TCPTABLE pTcpTable)
{
     if(pTcpTable != NULL)
         ::GlobalFree(pTcpTable);
}

char* Tcp()
{
   PMIB_TCPTABLE pTcpTable = MyGetTcpTable(TRUE);
   char    szBuf[14096]="";
     if(pTcpTable != NULL)
     {
         char    strState[12800];
         struct in_addr    inadLocal, inadRemote;
         DWORD   dwRemotePort = 0;
         char    szLocalIp[128];
         char    szRemIp[128];

         sprintf(szBuf,"TCP TABLE\n");
         for(UINT i = 0; i < pTcpTable->dwNumEntries; ++i)
         {
             // ??
             switch (pTcpTable->table[i].dwState)
             {
             case MIB_TCP_STATE_CLOSED:
                 strcpy(strState, "CLOSED");
                 break;
             case MIB_TCP_STATE_TIME_WAIT:
                 strcpy(strState, "TIME_WAIT");
                 break;
             case MIB_TCP_STATE_LAST_ACK:
                 strcpy(strState, "LAST_ACK");
                 break;
             case MIB_TCP_STATE_CLOSING:
                 strcpy(strState, "CLOSING");
                 break;
             case MIB_TCP_STATE_CLOSE_WAIT:
                 strcpy(strState, "CLOSE_WAIT");
                 break;
             case MIB_TCP_STATE_FIN_WAIT1:
                 strcpy(strState, "FIN_WAIT1");
                 break;
             case MIB_TCP_STATE_ESTAB:
                 strcpy(strState, "ESTAB");
                 break;
             case MIB_TCP_STATE_SYN_RCVD:
                 strcpy(strState, "SYN_RCVD");
                 break;
             case MIB_TCP_STATE_SYN_SENT:
                 strcpy(strState, "SYN_SENT");
                 break;
             case MIB_TCP_STATE_LISTEN:
                 strcpy(strState, "LISTEN");
                 break;
             case MIB_TCP_STATE_DELETE_TCB:
                 strcpy(strState, "DELETE");
                 break;
             default:
                strcpy(strState,"Error: unknown state!\n");
                 break;
             }
             // 本地地址
             inadLocal.s_addr = pTcpTable->table[i].dwLocalAddr;

             // ?程端口
             if (strcmp(strState, "LISTEN") != 0)
             {
                 dwRemotePort = pTcpTable->table[i].dwRemotePort;
             }
             else
                 dwRemotePort = 0;
             // ?程IP地址
             inadRemote.s_addr = pTcpTable->table[i].dwRemoteAddr;

           if(inadLocal.S_un.S_addr != 0 && inadLocal.S_un.S_addr != 0x100007f)
           {
               strcpy(szLocalIp, inet_ntoa(inadLocal));
               strcpy(szRemIp, inet_ntoa(inadRemote));
               sprintf(szBuf,"%20s %10u %20s %10u %s\n",
                   szLocalIp, ntohs((unsigned short)(0x0000FFFF & pTcpTable->table[i].dwLocalPort)),
                   szRemIp, ntohs((unsigned short)(0x0000FFFF & dwRemotePort)),
                   strState);
               return szLocalIp;
           }
         }
         MyFreeTcpTable(pTcpTable);
     }
   return "127.0.0.1";;
}

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