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WWakerFAN

Can't Connect to Server

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I have a managed c++ app that's the server, and it connects like this,
			listener = (gcnew System::Net::Sockets::Socket(
								System::Net::Sockets::AddressFamily::InterNetwork,
								System::Net::Sockets::SocketType::Stream,
								System::Net::Sockets::ProtocolType::Tcp
							  )
						);


			System::Net::IPHostEntry^ ipHostInfo = System::Net::Dns::GetHostEntry(System::Net::Dns::GetHostName());
			System::Net::IPAddress^ ipAddress = ipHostInfo->AddressList[0];
			System::Net::IPEndPoint^ localEndPoint = (gcnew System::Net::IPEndPoint(ipAddress, 8888));

			listener->Bind(localEndPoint);
			listener->Listen(100);
			listener->BeginAccept(gcnew System::AsyncCallback(&SOCConnectionManager::frmMain::AcceptCallback), listener);

then i have my client that connects like this,
            WORD version;
            WSADATA wsaData;
            int rVal=0;

            version = MAKEWORD(1,1);

            WSAStartup(version,(LPWSADATA)&wsaData);

            LPHOSTENT hostEntry;

            //store information about the server
            hostEntry = gethostbyname("localhost");

            if(!hostEntry) {
                WSACleanup();
                break;
            }

            //create the socket
            theSocket = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);

            if(theSocket == SOCKET_ERROR) {
                MessageBoxA(0, "COULD NOT CREATE SOCKET", "DLL Message", MB_OK | MB_ICONINFORMATION);
                break;
            }

            //Fill in the sockaddr_in struct
            SOCKADDR_IN serverInfo;

            serverInfo.sin_family = PF_INET;
            serverInfo.sin_addr = *((LPIN_ADDR)*hostEntry->h_addr_list);

            serverInfo.sin_port = htons(8888);

            rVal=connect(theSocket,(LPSOCKADDR)&serverInfo, sizeof(serverInfo));

            if(rVal==SOCKET_ERROR) {
                MessageBoxA(0, "COULD NOT CONNECT", "DLL Message", MB_OK | MB_ICONINFORMATION);
                //break;
            }
originally i just had an unmanaged console app for the server, and it managed to connect fine, but this one doesn't want to and i'm unsure as to why.

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GetHostName will resolve to some IP address -- or an error, in many cases.
localhost will resolve to 127.0.0.1.
Your bind explicitly does NOT bind to 127.0.0.1, so it's no surprise if 127.0.0.1 doesn't actually connect.

You want the server to bind to address "0.0.0.0" which is an alias for "all interfaces on this machine." That way, it'll be bound to 127.0.0.1, and "localhost" will find it.

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i replaced
System::Net::IPHostEntry^ ipHostInfo = System::Net::Dns::GetHostEntry(System::Net::Dns::GetHostName());
System::Net::IPAddress^ ipAddress = ipHostInfo->AddressList[0];
System::Net::IPEndPoint^ localEndPoint = (gcnew System::Net::IPEndPoint(ipAddress, 8888))

with
System::Net::IPEndPoint^ localEndPoint = (gcnew System::Net::IPEndPoint(System::Net::IPAddress::Any, 8888));

and it still won't connect :/

[Edited by - WWakerFAN on November 15, 2006 6:40:55 AM]

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