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+ +// Winsock startup +WSADATA wsaData; +// Winsock version 2.2 is requested +int result = WSAStartup(MAKEWORD(2,2), &wsaData); +if(result){ + fprintf(stderr, "WSAStartup() failed %d\n", result); + return EXIT_FAILURE; +} + + //create a socket +SOCKET socketfd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); +if(socketfd == INVALID_SOCKET){ + fprintf(stderr, "Error: socket() %ld\n", WSAGetLastError()); + WSACleanup(); + return EXIT_FAILURE; +} + + //bind our application to the socket + if(bind(socketfd, (struct sockaddr *)&serveraddr, sizeof(serveraddr))){ + fprintf(stderr, "Error: bind() failed, code %ld\n", WSAGetLastError()); // WSAGetLastError() is the winsock equivalent of errno + closesocket(socketfd); + WSACleanup(); + return EXIT_FAILURE; +} + + //listen for connections + if(listen(socketfd, CLIENT_LIMIT)){ + fprintf(stderr, "Error: listen() failed, code %ld\n", WSAGetLastError()); + closesocket(socketfd); + WSACleanup(); + return EXIT_FAILURE; + } + + struct sockaddr clientaddr; + int clientaddr_size = sizeof(clientaddr); + //accept client - function yields until the backlog queue has at least one entry from which it will grab the top + SOCKET client_socket = accept(socketfd, &clientaddr, &clientaddr_size); + if(client_socket == INVALID_SOCKET){ + fprintf(stderr, "Error: accept() failed, code %ld\n", WSAGetLastError()); + closesocket(socketfd); + WSACleanup(); + return EXIT_FAILURE; +} + + char writeBuffer[100] = {0}; + snprintf(writeBuffer, sizeof(writeBuffer),"%s",SERVER_MSG); + // Send only what the string actually contains, not the entire buffer + result = send(client_socket, writeBuffer, (int)strlen(writeBuffer), 0); + if(result == SOCKET_ERROR){ + fprintf(stderr, "Error: send() failed, code %ld\n", WSAGetLastError()); + closesocket(client_socket); + closesocket(socketfd); + WSACleanup(); + return EXIT_FAILURE; +} + + closesocket(client_socket); + closesocket(socketfd); + WSACleanup(); + + return EXIT_SUCCESS; +}//end of main method + +/* +// Sources: +https://medium.com/@adityakumarbgs6/network-programming-part-1-using-winsock-programming-sockets-1978e4de94a2 +*/