Question

我有一个c＃gui，当单击一个按钮时会调用引用的c ++ dll。在c ++ dll中，我有以下代码

  SOCKADDR_IN server; 

    server.sin_port=htons (54321); 
    server.sin_family = AF_INET; 

    server.sin_addr.s_addr = INADDR_ANY; 

    // Connect to server.
    int iResult = connect(Socket, (SOCKADDR *) & server, sizeof (server));
    if (iResult == SOCKET_ERROR) {

          long iError = WSAGetLastError();
            if (iError == WSAEWOULDBLOCK)
                printf("recv failed with error: WSAEWOULDBLOCK\n");
            else
                printf("recv failed with error: %ld\n", iError);

        wprintf(L"connect function failed with error: %ld\n", WSAGetLastError());
        iResult = closesocket(Socket);
        if (iResult == SOCKET_ERROR)
        wprintf(L"closesocket function failed with error: %ld\n", WSAGetLastError());
        WSACleanup();
        return 1;
    }

在调用dll之前的c＃调用程序和winll2在dll中建立的连接中，我有

IPAddress localAddr = IPAddress.Parse("127.0.0.1");
TcpListener serverSocket = new TcpListener(localAddr,54321);
int requestCount = 0;
TcpClient clientSocket = default(TcpClient);
serverSocket.Start();

然后在调用dll之后我做了

//调用dll来运行连接代码

clientSocket = serverSocket.AcceptTcpClient();//hangs up here because dll can't Connect.

在c ++ dll中，当我介入Connect时，我得到错误10049，这是 WSAEADDRNOTAVAIL。

msdn winsock error codes

我在Connect通话中做错了什么？我选择了54321作为msdn示例之后的端口。谢谢！

Answer 1

从我所看到的情况来看，除非您未在此处提供代码，否则您尚未正确设置sin_addr结构的SOCKADDR_IN字段。它期望以网络字节顺序的IP地址。

您需要执行以下操作：

inet_pton(AF_INET, "127.0.0.1", &server.sin_addr);

来源：

http://msdn.microsoft.com/en-us/library/windows/desktop/cc805844(v=vs.85).aspx

Winsock Connect失败，错误10049

1 个答案: