getting a binding error in server program

Didn't you find some working example of socket server application?

not one that uses broadcast. its very difficult to find. if you could link any examples that would be great

Why do you use INADDR_BROADCAST instead of INADDR_ANY for your server socket?

i was told to use it. its a requirement

Quote:

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Originally Posted by beginner91

i was told to use it. its a requirement

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The first "requirement" for you is reading the documentation!
Understand?

If you read the documentation about INADDR_BROADCAST you'd know that it is used to send a broadcast (see http://msdn.microsoft.com/en-us/libr...(v=vs.85).aspx)
To receive the broadcasts socket uses INADDR_ANY (see the http://msdn.microsoft.com/en-us/libr...(v=vs.85).aspx)

sorry those links don't work for me

but i understand. so INADDR_ANY is used in the server and INADDR_BROADCAST is used in the client

Quote:

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Originally Posted by beginner91

sorry those links don't work for me

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Sorry! My fault... :blush:
I've edited links.

ok so i changed it to INADDR_ANY but i'm still getting the same error with listen

Quote:

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Originally Posted by beginner91

ok so i changed it to INADDR_ANY but i'm still getting the same error with listen

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with listen or with bind?

i thought i only needed to change this line:

Code:

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ServerAddr.sin_addr.s_addr = INADDR_ANY;

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Note also the listen applies only to sockets that support connections, that is, those of type SOCK_STREAM!
Datagram socket has to use recvfrom function.

so i'm missing the recvform function?

Code:

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WSADATA wsaData;
                SOCKET ListeningSocket, NewConnection;
                SOCKADDR_IN ServerAddr;
                int Port = 7171;
                char recvbuff[1024];
                int i, nlen;

                if (WSAStartup(MAKEWORD(2,2), &wsaData) != 0)
                {
                        CString text;
                        text.Format(_T("ERROR WSAStartup failed: %d"), WSAGetLastError());
                        AfxMessageBox(text);
                        exit (1);
                }
       
                //ListeningSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
                  ListeningSocket = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);

                if (ListeningSocket == INVALID_SOCKET)
                {
                        CString text;
                        text.Format(_T("ERROR at socket, error code: %d"), WSAGetLastError());
                        AfxMessageBox(text);
                        WSACleanup();
                        exit (1);
                }
       

                ServerAddr.sin_family = AF_INET;
                ServerAddr.sin_port = htons(Port);
                ServerAddr.sin_addr.s_addr = INADDR_ANY;

                if (bind(ListeningSocket, (SOCKADDR *)&ServerAddr, sizeof(ServerAddr)) == SOCKET_ERROR)
                {
                        CString text;
                        text.Format(_T("ERROR bind failed, Error code: %d"), WSAGetLastError());
                        AfxMessageBox(text);
                        closesocket(ListeningSocket);
                        WSACleanup();
                        exit (1);
                }

                if (listen(ListeningSocket, 5) == SOCKET_ERROR)
                {
                        CString text;
                        text.Format(_T("ERROR listen: Error listening on socket: %d"), WSAGetLastError());
                        AfxMessageBox(text);
                        closesocket(ListeningSocket);
                        WSACleanup();
                        exit (1);
                }

                while(1)
                {
                        NewConnection = SOCKET_ERROR;
                        while(NewConnection == SOCKET_ERROR)
                        {
                                NewConnection = accept(ListeningSocket, NULL, NULL);
                                memset(&ServerAddr, 0, sizeof(ServerAddr));
                                nlen = sizeof(ServerAddr);

                                int ret = sendto(ListeningSocket, recvbuff, strlen(recvbuff), 0, (sockaddr*)&ServerAddr, nlen);
                            if(ret < 0)
                                {
                                        CString text;
                                        text.Format(_T("ERROR Error broadcasting to the clients: %d"), WSAGetLastError());
                                        AfxMessageBox(text);
                                }

                        }
                               
                }

                if( shutdown(NewConnection, SD_SEND) != 0)
                        printf("\n\nServer: Well, there is something wrong with the shutdown. The error code: %ld\n", WSAGetLastError());
                        CString text;
                        text.Format(_T("ERROR Something wrong with shutdown, error code: %d"), WSAGetLastError());
                        AfxMessageBox(text);
               

    SetTimer(0x01, 100, NULL);
}

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Quote:

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Originally Posted by beginner91

so i'm missing the recvform function?

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Please, read the documentation about socket programming! Use MSDN and Google to find the examples!

it is difficult to look up a document for every function especially when i don't know the functions needed. do you know of any fully completed examples/source code?

Quote:

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Originally Posted by beginner91

it is difficult to look up a document for every function especially when i don't know the functions needed.

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Yes, it is.
But you must if, of cousre, you want to become a programmer!

Quote:

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Originally Posted by beginner91

do you know of any fully completed examples/source code?

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No, because I never used datagram sockets, only TCP.
But I'm sure Google knows! Just ask him! :)

http://beej.us/guide/bgnet/output/ht...age/bgnet.html