Question

我有一个函数 createServerSocket（）。多个线程可以访问此函数以创建其套接字。

我希望每个线程都传递三个参数，一个 socketIdentifier ，* sockaddr_in *和特定的端口号到 createrServerSocket（）函数，所以每个线程都有一个唯一的套接字。

为此，我将 socketIdentifier ，* sockaddr_in *和特定的端口号传递给createrServerSocket（）函数作为指针，以便创建socketIdentifier和socket必须在线程内可访问。

以下是我的代码段：

VOID createServerSocket(SOCKADDR_IN *socket, SOCKET *socketIdentifier, int PORT)
{

   //Socket Binding//
   WSADATA wsa; 

   //Initialise winsock//
   if (WSAStartup(MAKEWORD(2,2),&wsa) != 0)
      {
         exit(EXIT_FAILURE);
      }

   //Create a socket//
   if((*socketIdentifier = socket(AF_INET , SOCK_DGRAM , 0 )) == INVALID_SOCKET)
      {                 
         MessageBox(NULL,
                    "Socket not Created",
                    "Failure :(",
                    MB_ICONINFORMATION);
         exit(EXIT_FAILURE);
      }
   //Socket Created//

   //Prepare the sockaddr_in structure//
   *socket.sin_family = AF_INET;
   *socket.sin_addr.s_addr = INADDR_ANY;
   *socket.sin_port = htons( PORT );

   //Bind//
   if( bind(socketIdentifier ,(struct sockaddr *)&socket , sizeof(socket)) == SOCKET_ERROR)
      {             
         MessageBox(NULL,
                    "Bind Failed",
                    "Failure :(",
                    MB_ICONINFORMATION);
         exit(EXIT_FAILURE);
      }
   //Else Bind Done//
   MessageBox(NULL,
              "Bind Done",
              "SUCCESS :)",
              MB_ICONINFORMATION);

}

这是调用函数：

DWORD WINAPI threadProc(LPVOID param)
{
    SOCKADDR_IN socket;
    SOCKET socketIdentifier;
    createServerSocket(*socket,*socketIdentifier,8888); //Create a socket with a socketIdentifier and bind()ed to PORT#8888.
        //Do something at this socket
        Return TRUE;
}

这些是我得到的错误：

错误C2064：术语不评估为采用3个参数的函数
  错误C2228：＆＃39; .sin_family＆＃39;必须有class / struct / union   错误C2228：＆＃39; .sin_addr＆＃39;必须有class / struct / union
  错误C2228：左边的＆＃39; .S_un＆＃39;必须有class / struct / union
  错误C2228：左边的＆＃39; .S_addr＆＃39;必须有class / struct / union   错误C2228：＆＃39; .sin_port＆＃39;必须有class / struct / union
  错误C2070：＆＃39;＆＃39;未知类型＆＃39;＆＃39;：非法sizeof操作数

订单： if（（* socketIdentifier = socket（AF_INET，SOCK_DGRAM，0））== INVALID_SOCKET）

错误： 错误C2064：术语不评估为采用3个参数的函数

Answer 1

您的bind电话完全错误，应该是：

bind(*socketIdentifier, (SOCKADDR*) socket, sizeof(*socket))

在socket结构指针的初始化中也存在优先级问题，这会导致编译器错误。使用(*socket).sin_family等，或socket->sin_family等。最后一个是结构指针的常见用法。

Answer 2

您有一个名为socket的变量，它会在您的函数createServerSocket中导致问题和编译器错误。请尝试这样的事情：

VOID createServerSocket(SOCKADDR_IN& sock, SOCKET& socketIdentifier, int PORT)
{

   //Socket Binding//
   WSADATA wsa; 

   //Initialise winsock//
   if (WSAStartup(MAKEWORD(2,2),&wsa) != 0)
      {
         exit(EXIT_FAILURE);
      }

   //Create a socket//
   if((socketIdentifier = socket(AF_INET , SOCK_DGRAM , 0 )) == INVALID_SOCKET)
      {                 
         MessageBox(NULL,
                    "Socket not Created",
                    "Failure :(",
                    MB_ICONINFORMATION);
         exit(EXIT_FAILURE);
      }
   //Socket Created//

   //Prepare the sockaddr_in structure//
   sock.sin_family = AF_INET;
   sock.sin_addr.s_addr = INADDR_ANY;
   sock.sin_port = htons( PORT );

}

DWORD WINAPI threadProc(LPVOID param)
{
    SOCKADDR_IN sock;
    SOCKET socketIdentifier;
    createServerSocket(sock,socketIdentifier,8888); //Create a socket with a socketIdentifier and bind()ed to PORT#8888.
        //Do something at this socket
        return TRUE;
}

将指针传递给函数中的SOCKADDR_IN和SOCKET

2 个答案: