StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

POError on server/client c program: "Connect: socket operation on non-socket"
text
Body
copied!<p>I'm working on a socket program and everything seems fine when compiling. First I compile and run the server and then I compile and run the client. The server will run fine, but when the client starts up, I receive an error message in the <code>Connect()</code> function. Although the socket appears to be okay, the client will not connect and the server does not see the connection attempt.</p> <p>The error message is:</p> <blockquote> <p>Connect: Socket operation on non-socket</p> </blockquote> <p>Here is the server-side code:</p> <pre><code>if ((ListeningSocket = socket(AF_INET, SOCK_STREAM,0 )) == -1){ printf("socket failed!\n"); exit(1); } else printf("Server: socket() is OK!\n"); ServerAddr.sin_family = AF_INET; ServerAddr.sin_port = htons(5000); ServerAddr.sin_addr.s_addr = INADDR_ANY; // any one for any network can connect memset(&(ServerAddr.sin_zero), '\0', 8); // if (bind (ListeningSocket, (struct sockaddr *)&ServerAddr, sizeof(struct sockaddr))==-1) { printf("Server: bind() failed!\n"); exit (1); } else printf("Server: bind() is OK!\n"); if (listen(ListeningSocket,5)== -1){ printf("Server: Error listening on socket\n"); exit (1); } else{ printf("Server: listen() is OK, I'm waiting for connections...\n"); printf("Server: accept() is ready...\n");} sin_size = sizeof(struct sockaddr_in); NewConnection = accept(ListeningSocket, (struct sockaddr *)&ClientAddr,(socklen_t *)&sin_size); printf("Server: accept() is OK...\n"); printf("Server: Client connected, ready for receiving and sending data...\n"); ......... .... //} </code></pre> <p>And here is the client-side code:</p> <pre><code>if(SendingSocket = socket(AF_INET, SOCK_STREAM, 0) == -1) { printf("Client: socket() failed!"); exit (1); } else printf("Client: socket() is OK!\n"); ClientAddr.sin_family = AF_INET; ClientAddr.sin_port = htons(5000); ClientAddr.sin_addr.s_addr = inet_addr("127.0.0.1"); memset(&(ClientAddr.sin_zero), '\0', 8); if ( connect (SendingSocket, (struct sockaddr *)&ClientAddr, sizeof(struct sockaddr)) == -1) { perror("Connect"); exit(1); } else { printf("Client: connect() is OK, got connected...\n"); printf("Client: Ready for sending and/or receiving data...\n"); } .... </code></pre>

Querying!

Guidance

An individual column

Larger individual text columns get their own page to allow for proper reading.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload