Multithreaded server in C++ and Win32

password · 2008-04-04T12:02:45

I've been searching around for about 4 hours now about how to implement Winsock in a threaded program. I didn't find anything good at all, only a bunch of weird examples that doesn't actually work or use Winsockets. How can I structure my program so I can handle many clients at once? My code so far is good enough to handle one client. Right now it looks something like this. WSADATA wsaData; SOCKET ListenSocket; int iResult; struct addrinfo *result = NULL, *ptr = NULL, hints; // initiera Winsock iResult = WSAStartup(MAKEWORD(2,2), &wsaData); if (iResult != 0) { std::cout << "WSAStartup failed: " << iResult << std::endl; } ZeroMemory(&hints, sizeof(hints)); hints.ai_family = AF_INET; hints.ai_socktype = SOCK_STREAM; hints.ai_protocol = IPPROTO_TCP; hints.ai_flags = AI_PASSIVE; iResult = getaddrinfo(NULL, DEFAULT_PORT, &hints, &result); if (iResult != 0) { std::cerr << "getaddrinfo failed: " << iResult << std::endl; WSACleanup(); } ListenSocket = socket(result->ai_family, result->ai_socktype, result->ai_protocol); if (ListenSocket == INVALID_SOCKET) { std::cerr << "Error at socket(): " << WSAGetLastError() << std::endl; freeaddrinfo(result); WSACleanup(); } iResult = bind(ListenSocket, result->ai_addr, (int)result->ai_addrlen); if (iResult == SOCKET_ERROR) { std::cout << "bind failed: " << WSAGetLastError() << std::endl; freeaddrinfo(result); closesocket(ListenSocket); WSACleanup(); } freeaddrinfo(result); if (listen(ListenSocket, SOMAXCONN ) == SOCKET_ERROR) { std::cout << "Error at bind(): " << WSAGetLastError(); closesocket(ListenSocket); WSACleanup(); } SOCKET ClientSocket = INVALID_SOCKET; // accepterar för tillfället bara en anslutning från klientsidan ClientSocket = accept(ListenSocket, NULL, NULL); if (ClientSocket == INVALID_SOCKET) { printf("accept failed: %d\n", WSAGetLastError()); closesocket(ListenSocket); WSACleanup(); } // closesocket(ListenSocket); char recvbuf[DEFAULT_BUFLEN]; int iSendResult; int recvbuflen = DEFAULT_BUFLEN; // ta emot paket tills den anslutade stänger av sin anslutning do { iResult = recv(ClientSocket, recvbuf, recvbuflen, 0); if (iResult > 0) { std::cout << "Bytes received: " << iResult << std::endl; // Echo the buffer back to the sender iSendResult = send(ClientSocket, recvbuf, iResult, 0); if (iSendResult == SOCKET_ERROR) { std::cout << "send failed: " << WSAGetLastError() << std::endl; closesocket(ClientSocket); WSACleanup(); return 0; } std::cout << "Bytes sent: " << iSendResult << std::endl; } else if (iResult == 0) { std::cout << "Connection closing.. " << std::endl; } else { std::cout << "recv failed: " << std::endl; closesocket(ClientSocket); WSACleanup(); return 0; } } while (iResult > 0); // shutdown the send half of the connection since no more data will be sent iResult = shutdown(ClientSocket, SD_SEND); if (iResult == SOCKET_ERROR) { std::cout << "shutdown failed: " << WSAGetLastError() << std::endl; closesocket(ClientSocket); WSACleanup(); return 0; } Thankful for help. I've been trying everything I can.

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Started by password April 03, 2008 07:39 AM

9 comments, last by Antheus 16 years ago

Antheus

2,410

April 04, 2008 12:02 PM

Quote:Original post by password

Another question (hopefully my last one). The boost directory that was created, am I supposed to add it directly into the lib/ folder of the IDE so I get: MSVC/VC++/lib/boost/...?

Tools/Options/Projects and Solutions/VC++ Directories

Then add the paths to "Include files" and "Library files". This will give your entire IDE access to boost.

Boost libraries use auto-linking, so no additional configuration is needed, no matter how you build your applications.

Multithreaded server in C++ and Win32

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Multithreaded server in C++ and Win32

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