3 * A PackageRecipient discovery class
5 * @author Roland Haeder <webmaster@ship-simu.org>
7 * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2011 Core 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 PackageRecipientDiscovery extends BaseHubDiscovery implements DiscoverableRecipient, Registerable {
26 * Protected constructor
30 protected function __construct () {
31 // Call parent constructor
32 parent::__construct(__CLASS__);
36 * Create an instance of this class
38 * @return $discoveryInstance An instance of this discovery class
40 public static final function createPackageRecipientDiscovery () {
41 // Get an instance of this class
42 $discoveryInstance = new PackageRecipientDiscovery();
44 // Get recipients list instance and set it
45 $listInstance = RecipientListFactory::createRecipientListInstance();
46 $discoveryInstance->setListInstance($listInstance);
48 // Output debug message
49 $discoveryInstance->debugOutput('RECIPIENT-DISCOVERY: Initialized.');
51 // Return the prepared instance
52 return $discoveryInstance;
56 * Tries to discover all recipients for given package data
58 * @param $packageData Raw package data array
61 public function discoverRecipients (array $packageData) {
62 // We do some rudimentary checks but this might be a bit ugly
63 switch ($packageData[NetworkPackage::PACKAGE_DATA_RECIPIENT]) {
64 // All upper hubs, these are currently the bootstrap nodes and later on prepended list-nodes
65 case NetworkPackage::NETWORK_TARGET_UPPER_HUBS:
66 // Get all bootstrap nodes
67 foreach (explode(BaseHubSystem::BOOTSTRAP_NODES_SEPARATOR, $this->getConfigInstance()->getConfigEntry('hub_bootstrap_nodes')) as $node) {
69 /* DEBUG: */ $this->debugOutput('DISCOVERY: Adding node ' . $node . ' as recipient.');
72 $this->getListInstance()->addEntry('ip_port', $node);
76 // The target 'self' is always the external IP address!
77 case NetworkPackage::NETWORK_TARGET_SELF:
78 // Determine IP or 'external_ip' if set
79 $ip = HubTools::determineOwnExternalIp();
81 // Get port and add it
82 $ipPort = $ip . ':' . $this->getConfigInstance()->getConfigEntry('node_' . $this->determineProtocolByPackageData($packageData) . '_listen_port');
85 $this->getListInstance()->addEntry('ip_port', $ipPort);
88 // This may be a direct recipient (node's session id)
90 $this->partialStub('Please add code handling recipients ' . $packageData[NetworkPackage::PACKAGE_DATA_RECIPIENT]);
96 * Tries to discover all recipients by given decoded package data.
98 * @param $decodedData Decoded raw package data array
100 * @todo Add some validation of recipient field, e.g. ip:port is found
102 public function discoverDecodedRecipients (array $decodedData) {
103 // First clear all recipients
104 $this->clearRecipients();
106 // Explode 'recipient', first element is the IP/hostname
107 $recipient = explode(':', $decodedData[NetworkPackage::PACKAGE_DATA_RECIPIENT]);
109 // Is the 'recipient' field same as this peer's IP?
110 if ($recipient[0] == HubTools::determineOwnExternalIp()) {
112 * Is same as own external IP, don't do anything here so other
113 * classes found an empty recipient list for internal (own) handling
114 * of the original content.
117 // Debug output (may flood)
118 /* NOISY-DEBUG: */ $this->debugOutput('RECIPIENT-DISCOVERY: Recipient ' . $recipient[0] . ' matches own ip (' . HubTools::determineOwnExternalIp() . ')');
120 // Debug output (may flood)
121 /* NOISY-DEBUG: */ $this->debugOutput('RECIPIENT-DISCOVERY: Recipient ' . $recipient[0] . ' is different than own ip (' . HubTools::determineOwnExternalIp() . '), need to forward (not yet implemented)!');
123 // This package is to be delivered to someone else, so add it
124 $this->getListInstance()->addEntry('ip_port', $decodedData[NetworkPackage::PACKAGE_DATA_RECIPIENT]);
129 * "Getter" for recipient iterator
131 * @return $iteratorInstance An instance of a Iterateable object
133 public function getIterator () {
134 // Get iterator from it
135 $iteratorInstance = $this->getListInstance()->getIterator();
138 return $iteratorInstance;
142 * Checks whether the recipient list is empty
144 * @return $isEmpty Whether the recipient list is empty
146 public function isRecipientListEmpty () {
148 $isEmpty = ($this->getListInstance()->count() == 0);
155 * Clears all recipients for e.g. another package to deliver. This method
156 * simply clears the inner list instance.
160 public function clearRecipients () {
162 $this->getListInstance()->clearList();