c++ - 连接错误 : Invalid argument at sockets

Question

我有这个代码

Server:
//"sock" has already been created with no problem and binding as well

void Connection::bind_connection(int port){
    cout << "Port " << port << endl;
    server.sin_family = AF_INET ;
    server.sin_addr.s_addr = htonl(INADDR_ANY);
    server.sin_port = htons(port);
    /* Bind socket to address */
    struct sockaddr *serverptr = ( struct sockaddr *) &server;
    if ( bind ( sock , serverptr , sizeof(server) ) < 0) {
        perror("Binding error"); exit(BE);
    }
    cout << "Server binding completed!" << endl;
}    

struct sockaddr_in client ;
socklen_t clientlen ;
struct sockaddr * clientptr =( struct sockaddr *) &client ;
if ( listen (sock , MAX_CONNECTIONS) < 0) {perror("listening error"); exit(LE);}
cout << "Listening for connections to port " << port << endl;
while (1) {
    /* accept connection */
    if (( newsock = accept ( sock , clientptr , &clientlen ) ) < 0) {
        perror("Accepting error"); cout << "Errno = " << errno << endl; exit(AE);
    }
    //Code
    ....
}

和

Client:
//struct sockaddr_in server; <--- declared as data member of class "Connection"
//"sock" has already been created with no problem
void Connection::do_connect(){
    struct sockaddr *serverptr = ( struct sockaddr *) &server;
    if ( connect ( sock , serverptr , sizeof (server) ) < 0)
         perror("client connect"); exit(CE);
    cout << "Client connecting to the server" << endl;
}

我收到了上面的消息。大部分代码是从类(class)幻灯片中复制的，但根据我的需要进行了修改。谷歌搜索问题似乎我在系统调用中给出了错误的大小。知道问题到底出在哪里吗？提前致谢。

Answer 1

那些行总是退出:

if ( connect ( sock , serverptr , sizeof (server) ) < 0)
     perror("client connect"); exit(CE);

您可能会开始考虑使用不同的缩进方案。通常每行不使用超过一个语句。

对于上面的代码，indent 之类的工具会将其格式化为:

if (connect (sock, serverptr, sizeof (server)) < 0)
  perror("client connect");
exit(CE);

这种格式使编程错误很明显。