void TcpServer::listen() {
serverSocket = socket(AF_INET, SOCK_STREAM, 0);
if (serverSocket == -1) {
logError("Could not create socket");
return;
}
if (bind(serverSocket, (struct sockaddr *) &serverAddress,
sizeof(serverAddress)) < 0) {
logError("Could not bind socket");
return;
}
::listen(serverSocket, 1);
logDebug("Waiting for incoming connections...");
serverInstance = this;
int clientSocket;
struct sockaddr_in client;
int c = sizeof(client);
while ((clientSocket = accept(serverSocket, (struct sockaddr *) &client,
(socklen_t*) &c))) {
const char* message = MessageConversion::getHandshakeInitiation();
bool connectionRefused = false;
StatusResponse response(false, nullptr);
if (numCurrentConnections < maxConnections
&& sendMessage(clientSocket, message)) {
char* receivedMessage = receiveMessage(clientSocket);
if (receivedMessage != nullptr) {
if (MessageConversion::isHandshakeCorrect(receivedMessage)) {
logDebug("Connection accepted");
response.setSuccess(true);
message = MessageConversion::convertResponseToJson(
&response);
if (sendMessage(clientSocket, message)) {
TcpConnection* connection = new TcpConnection(
clientSocket, this, spotifyRunner);
connection->start();
this->currentConnections.push_back(connection);
numCurrentConnections++;
}
delete[] message;
} else {
response.setMessage("Handshake incorrect.");
message = MessageConversion::convertResponseToJson(
&response);
sendMessage(clientSocket, message);
delete[] message;
connectionRefused = true;
}
delete[] receivedMessage;
} else {
response.setMessage("Error during receiving of message");
message = MessageConversion::convertResponseToJson(&response);
sendMessage(clientSocket, message);
delete[] message;
connectionRefused = true;
}
} else {
response.setMessage("Too many connections");
message = MessageConversion::convertResponseToJson(&response);
sendMessage(clientSocket, message);
delete[] message;
connectionRefused = true;
}
if (connectionRefused) {
logDebug("Connection refused");
shutdown(clientSocket, SHUT_RDWR);
}
}
shutdown(serverSocket, SHUT_RDWR);
}
