3 * A database wrapper for peer state lookups
5 * @author Roland Haeder <webmaster@ship-simu.org>
7 * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2011 Hub Developer Team
8 * @license GNU GPL 3.0 or any newer version
9 * @link http://www.ship-simu.org
11 * This program is free software: you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation, either version 3 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 class PeerStateLookupDatabaseWrapper extends BaseDatabaseWrapper implements LookupablePeerState {
25 // Exception constants
26 const EXCEPTION_PEER_ALREADY_REGISTERED = 0x300;
28 // Constants for database table names
29 const DB_TABLE_PEER_LOOKUP = 'peer_states';
31 // Constants for database column names
32 const DB_COLUMN_PEER_IP = 'peer_ip';
33 const DB_COLUMN_PEER_PORT = 'peer_port';
34 const DB_COLUMN_PEER_SESSION_ID = 'peer_session_id';
35 const DB_COLUMN_SOCKET_ERROR_CODE = 'socket_error_code';
36 const DB_COLUMN_SOCKET_ERROR_MSG = 'socket_error_msg';
39 * Protected constructor
43 protected function __construct () {
44 // Call parent constructor
45 parent::__construct(__CLASS__);
49 * Creates an instance of this database wrapper by a provided user class
51 * @return $wrapperInstance An instance of the created wrapper class
53 public static final function createPeerStateLookupDatabaseWrapper () {
55 $wrapperInstance = new PeerStateLookupDatabaseWrapper();
57 // Set (primary!) table name
58 $wrapperInstance->setTableName(self::DB_TABLE_PEER_LOOKUP);
60 // Return the instance
61 return $wrapperInstance;
65 * Getter for index key
67 * @return $indexKey Index key
69 public final function getIndexKey () {
70 return $this->getDatabaseInstance()->getIndexKey();
74 * Checks wether given 'sender' is a new peer
76 * @param $packageData Raw package data
77 * @return $isNewPeer Wether 'sender' is a new peer to this peer
79 public function isSenderNewPeer (array $packageData) {
80 //* DEBUG: */ $this->debugOutput('DATABASE-WRAPPER: ' . __FUNCTION__ . ' called with packageData()=' . count($packageData) . ' - ENTERED!');
81 // Is always new peer by default
84 // Is the package valid?
85 if (!isset($packageData[NetworkPackage::PACKAGE_DATA_SENDER])) {
86 // Invalid package found, please report this
87 die(__METHOD__ . ': packageData=' . print_r($packageData, true));
90 // Resolve session id > IP:port
91 //* DEBUG: */ $this->debugOutput('DATABASE-WRAPPER: sender=' . $packageData[NetworkPackage::PACKAGE_DATA_SENDER] . ' - resolving ...');
92 $ipPort = HubTools::resolveSessionId($packageData[NetworkPackage::PACKAGE_DATA_SENDER]);
93 //* DEBUG: */ $this->debugOutput('DATABASE-WRAPPER: ipPort=' . $ipPort);
95 // Is it not invalid:invalid?
96 if ($ipPort != NodeListDatabaseWrapper::INVALID_IP_PORT) {
97 // Get a search criteria instance
98 $searchInstance = ObjectFactory::createObjectByConfiguredName('search_criteria_class');
100 // Add 'sender' as the peer's IP address
101 $searchInstance->addCriteria(self::DB_COLUMN_PEER_IP, $ipPort);
102 $searchInstance->setLimit(1);
105 $entries = $this->doSelectCountByCriteria($searchInstance);
108 //* DEBUG: */ $this->debugOutput('DATABASE-WRAPPER: entries=' . $entries);
109 $isNewPeer = ($entries === 0);
113 //* DEBUG: */ $this->debugOutput('DATABASE-WRAPPER: isNewPeer=' . intval($isNewPeer) . ' - EXIT!');
118 * Registers a new peer with given package data. We use the session id from it.
120 * @param $packageData Raw package data
121 * @param $socketResource A valid socket resource
123 * @throws PeerAlreadyRegisteredException If a peer is already registered
125 public function registerPeerByPackageData (array $packageData, $socketResource) {
126 // Make sure only new peers can be registered with package data
127 if (!$this->isSenderNewPeer($packageData)) {
128 // Throw an exception because this should normally not happen
129 throw new PeerAlreadyRegisteredException(array($this, $packageData), self::EXCEPTION_PEER_ALREADY_REGISTERED);
132 // Generate a dataset instance
133 $dataSetInstance = ObjectFactory::createObjectByConfiguredName('dataset_criteria_class', array(self::DB_TABLE_PEER_LOOKUP));
135 // Session ids must be unique
136 $dataSetInstance->setUniqueKey(self::DB_COLUMN_PEER_SESSION_ID);
139 $dataSetInstance->addCriteria(self::DB_COLUMN_PEER_SESSION_ID, $packageData[NetworkPackage::PACKAGE_DATA_SENDER]);
142 if (!@socket_getpeername($socketResource, $peerName, $peerPort)) {
144 $lastError = socket_last_error($socketResource);
146 // ... and cleartext message from it and put both into criteria
147 $dataSetInstance->addCriteria(self::DB_COLUMN_SOCKET_ERROR_CODE, $lastError);
148 $dataSetInstance->addCriteria(self::DB_COLUMN_SOCKET_ERROR_MSG , socket_strerror($lastError));
151 // Add ip address and port
152 $dataSetInstance->addCriteria(self::DB_COLUMN_PEER_IP , $peerName);
153 $dataSetInstance->addCriteria(self::DB_COLUMN_PEER_PORT, $peerPort);
155 // "Insert" the data set
156 $this->getDatabaseInstance()->queryInsertDataSet($dataSetInstance);
160 * Registers the given peer state and raw package data
162 * @param $stateInstance A PeerStateable class instance
163 * @param $packageData Valid package data array
165 * @todo Unfinished area
167 public function registerPeerState (PeerStateable $stateInstance, array $packageData) {
168 $this->debugBackTrace('stateInstance=' . $stateInstance->__toString() . ' - UNFINISHED AREA!');
172 * Purges old entries of given socket resource. We use the IP address from that resource.
174 * @param $socketResource A valid socket resource
176 * @throws InvalidSocketException If the socket resource was invalid
178 public function purgeOldEntriesBySocketResource ($socketResource) {
180 if (!@socket_getpeername($socketResource, $peerName, $peerPort)) {
182 $lastError = socket_last_error($socketResource);
185 throw new InvalidSocketException(array($this, gettype($socketResource), $lastError, socket_strerror($lastError)), BaseListener::EXCEPTION_INVALID_SOCKET);