Winsock Connect失败，错误为10049

本文关键字：10049 错误 Connect 失败 Winsock | 更新日期: 2023-09-27 18:21:47

我有一个c#gui，它在单击按钮时调用引用的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dll中winsock2进行的连接中，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后，我进行

//调用dll以运行连接代码

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

在c++dll中，当我进入连接时，我得到错误10049，这是wseaddrnotavail。

msdn-winsock错误代码

我在Connect通话中做错了什么？我根据msdn示例选择了54321作为端口。谢谢

Winsock Connect失败，错误为10049

据我所见，除非您没有在这里提供代码，否则您没有正确设置SOCKADDR_IN结构的sin_addr字段。它需要一个按网络字节顺序排列的IP地址。

你需要做一些类似的事情：

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

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