c++ - 使用 WSAAddressToString 时的问题

Question

问题: 我正在尝试使用 WSAAddressToString 函数来获取计算机的 ip 地址。我浏览了他们网站上的 msdn 文档，其中有太多结构中的结构，我觉得那是我出错的地方。 pastebin link here 中提供了代码.请让我知道我到底哪里出错了。

解答:在代码中包含WSAStartup 函数并对现有代码进行一些修改后，该问题已得到解决。完整代码在pastebin中，修改部分如下。

     retval = WSAStartup(MAKEWORD(2, 2), &wsaData);
      if (retval != 0)
      {
          printf("WSAStartup() failed with error code %d\n", WSAGetLastError());
            return 1;
      }
   else
       printf("WSAStartup() is OK...\n");


        size=256;

        lp=pAddresses->FirstUnicastAddress->Address.lpSockaddr;
        size2=pAddresses->FirstUnicastAddress->Address.iSockaddrLength;
        if(WSAAddressToStringA(lp,size2,NULL,op,&size)!= 0)
        {
                    printf("This thing has failed \n");
                    printf("errordetail: %i\n", WSAGetLastError());

                    return 1;
        }
        else
                    printf("\t The ip address is  = %s\n", op);

Answer 1

请更改此:

if(WSAAddressToString(lp,size2, NULL,op,&size) != 0) {
    printf("This thing has failed \n");   
    return 1;
} else
    printf("Address string = %s\n", op);
    pAddresses = pAddresses->Next;
}

对此:

long errorcode = WSAAddressToString(lp,size2, NULL,op,&size);
if(errorcode != 0) {
    printf("The error is number: %i\n", errorcode);   
    return 1;
} else
    printf("Address string = %s\n", op);
    pAddresses = pAddresses->Next;
}

然后告诉我们它打印的是什么数字。

或者在http://msdn.microsoft.com/en-us/library/windows/desktop/ms681381%28v=vs.85%29.aspx中查找

编辑:

SOCKADDR_IN6 addrTemp;
addrTemp.sin6_family = AF_INET6;
long errorcode = WSAAddressToString(&addrTemp,size2, NULL,op,&size);
if(errorcode != 0) {
    //printf("The error is number: %i\n", errorcode);   
    printf("errordetail: %i\n", WSAGetLastError());
    return 1;
} else
    printf("Address string = %s\n", op);
    pAddresses = pAddresses->Next;
}