implement multiclient limit

src/packets.cpp

@@ -301,6 +301,19 @@ void AOClient::pktWebSocketIp(AreaData* area, int argc, QStringList argv, AOPack
 #endif
         remote_ip = QHostAddress(argv[0]);
         calculateIpid();
+
+        int multiclient_count = 0;
+        for (AOClient* joined_client : server->clients) {
+            if (remote_ip.isEqual(joined_client->remote_ip))
+                multiclient_count++;
+        }
+
+        if (multiclient_count > 5) {
+            socket->close();
+            return;
+        }
+
+        qDebug() << "MULTICLIENT COUNT WS: " << multiclient_count;
     }
 }
 

src/server.cpp

@@ -114,14 +114,31 @@ void Server::clientConnected()
             break;
     }
     AOClient* client = new AOClient(this, socket, this, user_id);
-    if (db_manager->isIPBanned(socket->peerAddress())) {
+
+    int multiclient_count = 1;
+    bool is_at_multiclient_limit = false;
+    bool is_banned = db_manager->isIPBanned(socket->peerAddress());
+    for (AOClient* joined_client : clients) {
+        if (client->remote_ip.isEqual(joined_client->remote_ip))
+            multiclient_count++;
+    }
+
+    qDebug() << "MULTICLIENT COUNT: " << multiclient_count;
+
+    if (multiclient_count > 5 && !client->remote_ip.isLoopback()) // TODO: make this configurable
+        is_at_multiclient_limit = true;
+
+    if (is_banned) {
         AOPacket ban_reason("BD", {db_manager->getBanReason(socket->peerAddress())});
         socket->write(ban_reason.toUtf8());
+    }
+    if (is_banned || is_at_multiclient_limit) {
         socket->flush();
         client->deleteLater();
         socket->close();
         return;
     }
+
     clients.append(client);
     connect(socket, &QTcpSocket::disconnected, client,
             &AOClient::clientDisconnected);