通过windows API获取本机IP

 1     //获取本机ip
 2     CString getIP()
 3     {
 4         SOCKET sd = WSASocket(AF_INET, SOCK_DGRAM, 0, 0, 0, 0);
 5         CString strIP;
 6         
 7         if (sd == SOCKET_ERROR)
 8         {
 9             closesocket(sd);
10             return _T("");
11         }     
12         else
13         {
14             INTERFACE_INFO InterfaceList[20];
15             unsigned long nBytesReturned;
16 
17             if (WSAIoctl(sd, SIO_GET_INTERFACE_LIST, 0, 0, &InterfaceList, sizeof(InterfaceList), &nBytesReturned, 0, 0) == SOCKET_ERROR)
18             {
19                 closesocket(sd);
20                 return _T("");
21             }
22             else
23             {
24                 int nNumInterfaces = nBytesReturned / sizeof(INTERFACE_INFO);
25 
26                 for (int i = 0; i < nNumInterfaces; i++)
27                 {
28                     sockaddr_in* pAddress;
29                     pAddress = (sockaddr_in*)&(InterfaceList[i].iiAddress);
30                     strIP = inet_ntoa(pAddress->sin_addr);
31                     if (strIP == _T("127.0.0.1"))
32                     {
33                         continue;
34                     }
35                     else
36                     {
37                             closesocket(sd);
38                             return strIP;
39                     }
40                 }
41                 closesocket(sd);
42                 return _T("");
43             }
44         }
45     }

记得包含头文件

1 #include <WinSock2.h>
2 #include <WS2tcpip.h>

参考自 https://bbs.csdn.net/topics/360237856