Stumped! Why isn't my application sending packets?

Tim Lawton · 2013-05-01T15:45:21

Hey there, I'm trying to create a server-client architecture application, which sends a struct called PLAYER which holds x,y,z as a float, the instance of PLAYER is Player. Defined like so struct PLAYER { float x, y, z; }; PLAYER Player; Additional declarations in the header file #define SERVER_ADDRESS "127.0.0.1" #define SERVER_PORT 17000 WSADATA Winsock; SOCKET Socket; sockaddr_in RemoteAddress; int SizeInt; These structs are available on both server and client applications, I then have this code to setup a socket on the SERVER application: void Application::Init_Winsock() { WSAStartup(MAKEWORD(2,2), &Winsock); if(LOBYTE(Winsock.wVersion) !=2 || HIBYTE(Winsock.wVersion) !=2) //Check Version { WSACleanup(); //Cleanup and end if not version 2 return; } //Create Socket Socket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); //Input Reciever Information ZeroMemory(&RemoteAddress, sizeof(RemoteAddress)); //Clear Struct RemoteAddress.sin_family = AF_INET; //Set the Family Address RemoteAddress.sin_port = SERVER_PORT; //Set Port bind(Socket, (sockaddr*)&RemoteAddress, sizeof(RemoteAddress)); //Start the recieve thread CreateThread(NULL, 0, RecvThread, (void*)this, 0, NULL); } Then a static function to receive packets from clients DWORD WINAPI Application::RecvThread(LPVOID knock) { Application *instance = static_cast<Application *>(knock); while(true) { PLAYER Recv; recvfrom(instance->Socket, (char*)&Recv, sizeof(PLAYER), 0, (sockaddr*)&instance->RemoteAddress, &instance->SizeInt); instance->Player = Recv; } } That struct is then used like this to move the object D3DXMatrixTranslation(&matTrans, Player.x, Player.y, Player.z); CLIENT Application: There is a similar init_winsock method: void Application::Init_Winsock() { WSAStartup(MAKEWORD(2,2), &Winsock); if(LOBYTE(Winsock.wVersion) !=2 || HIBYTE(Winsock.wVersion) !=2) //Check version { WSACleanup(); //Cleanup and return false if version is wrong return; } //Create Socket Socket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); //Input Receiver Information ZeroMemory(&RemoteAddress, sizeof(RemoteAddress)); //Clear Struct RemoteAddress.sin_family = AF_INET; //Set the Address Family RemoteAddress.sin_addr.s_addr = inet_addr(SERVER_ADDRESS); //Set IP Address RemoteAddress.sin_port = SERVER_PORT; //Set Port } Then a function to send packets to the Server's Address void Application::Send_Packet(PLAYER* data) { sendto(Socket, (char*)data, sizeof(PLAYER), 0, (sockaddr*)&RemoteAddress, sizeof(sockaddr)); } The DirectX11 object has initialization and rendered to the "Player.x/y/z" values in both applications. Although the object does not appear on the Servers screen when a client connects and starts moving around, modifying the "Player.x/y/z" values with WASD keys, I can't figure out why

Networking and Multiplayer Programming

Started by Tim Lawton April 25, 2013 09:45 PM

19 comments, last by rip-off 10 years, 11 months ago

rip-off

11,000

May 01, 2013 03:45 PM

Well, I cannot see your current code.

At the very least, add logging when an error occurs using an external API. You should not need to use a debugger to diagnose such errors. When a connection fails on another user's machine, they may not have a debugger or the skills required to effectively use one. Something not unlike this:

int result = SomeLib_DoStuff(/* ... */);
if(result != SOME_LIB_STUFF_DONE) {
     std::stringstream error;
     error << "DoStuff returned failure code: " << result << ", error message: " << SomeLib_GetError();
     log(error.str());
     return false;
}

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Stumped! Why isn't my application sending packets?

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Stumped! Why isn't my application sending packets?

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