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Added line numbers to debug lines as this will become the 'norm'
[hub.git] / application / hub / main / discovery / package / class_PackageRecipientDiscovery.php
1 <?php
2 /**
3  * A PackageRecipient discovery class
4  *
5  * @author              Roland Haeder <webmaster@ship-simu.org>
6  * @version             0.0.0
7  * @copyright   Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2012 Core Developer Team
8  * @license             GNU GPL 3.0 or any newer version
9  * @link                http://www.ship-simu.org
10  *
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.
15  *
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.
20  *
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/>.
23  */
24 class PackageRecipientDiscovery extends BaseHubDiscovery implements DiscoverableRecipient, Registerable {
25         /**
26          * Protected constructor
27          *
28          * @return      void
29          */
30         protected function __construct () {
31                 // Call parent constructor
32                 parent::__construct(__CLASS__);
33         }
34
35         /**
36          * Create an instance of this class
37          *
38          * @return      $discoveryInstance      An instance of this discovery class
39          */
40         public static final function createPackageRecipientDiscovery () {
41                 // Get an instance of this class
42                 $discoveryInstance = new PackageRecipientDiscovery();
43
44                 // Get recipients list instance and set it
45                 $listInstance = RecipientListFactory::createRecipientListInstance();
46                 $discoveryInstance->setListInstance($listInstance);
47
48                 // Output debug message
49                 self::createDebugInstance(__CLASS__)->debugOutput('RECIPIENT-DISCOVERY[' . __LINE__ . ']: Initialized.');
50
51                 // Return the prepared instance
52                 return $discoveryInstance;
53         }
54
55         /**
56          * Tries to discover all recipients for given package data
57          *
58          * @param       $packageData    Raw package data array
59          * @return      void
60          */
61         public function discoverRecipients (array $packageData) {
62                 // This must be available
63                 assert(isset($packageData[NetworkPackage::PACKAGE_DATA_RECIPIENT]));
64
65                 // First try out the direct recipient (session id)
66                 try {
67                         // Get instance (should not break)
68                         $recipientInstance = ObjectFactory::createObjectByConfiguredName('direct_recipient_class');
69
70                         // Try to solve it
71                         $recipientInstance->resolveRecipient($packageData[NetworkPackage::PACKAGE_DATA_RECIPIENT], $this->getListInstance());
72                 } catch (FrameworkException $e) {
73                         // Didn't work, so try the non-generic, depending recipient field itself (this may fail)
74                         try {
75                                 // Try to find the right class
76                                 $recipientInstance = ObjectFactory::createObjectByConfiguredName(strtolower($packageData[NetworkPackage::PACKAGE_DATA_RECIPIENT]) . '_recipient_class');
77
78                                 // And try to solve again
79                                 $recipientInstance->resolveRecipient($packageData[NetworkPackage::PACKAGE_DATA_RECIPIENT], $this->getListInstance());
80                         } catch (FrameworkException $e) {
81                                 // Could not find class, what ever failed
82                                 $this->debugInstance($e->getMessage());
83                         }
84                 }
85         }
86
87         /**
88          * Tries to discover all recipients by given decoded package data.
89          *
90          * @param       $decodedData    Raw raw package data array
91          * @return      void
92          * @todo        Add some validation of recipient field, e.g. ip:port is found
93          * @todo        The if() does only check for TCP, not UDP, e.g. try to get a $handlerInstance here
94          */
95         public function discoverRawRecipients (array $decodedData) {
96                 // This must be available
97                 assert(isset($decodedData[NetworkPackage::PACKAGE_DATA_RECIPIENT]));
98
99                 // First clear all recipients
100                 $this->clearRecipients();
101
102                 // Explode 'recipient', first element is the IP/hostname
103                 $recipient = explode(':', $decodedData[NetworkPackage::PACKAGE_DATA_RECIPIENT]);
104
105                 // Is the 'recipient' field same as this peer's IP?
106                 if ((($recipient[0] == HubTools::determineOwnExternalIp()) && ($recipient[1] == $this->getConfigInstance()->getConfigEntry('node_listen_port'))) || ($recipient[0] == $this->getConfigInstance()->getServerAddress())) {
107                         /*
108                          * Is same as own external IP + TCP/UDP listen port or internal IP, don't do anything here so other
109                          * classes found an empty recipient list for internal (own) handling
110                          * of the original content.
111                          */
112
113                         // Debug output (may flood)
114                         /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('RECIPIENT-DISCOVERY[' . __LINE__ . ']: Recipient ' . $recipient[0] . ' matches own ip (' .  HubTools::determineOwnExternalIp() . ' or ' . $this->getConfigInstance()->getServerAddress() . ')');
115                 } else {
116                         // Debug output (may flood)
117                         /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput('RECIPIENT-DISCOVERY[' . __LINE__ . ']: Recipient ' . $recipient[0] . ' is different than own external ip (' .  HubTools::determineOwnExternalIp() . ') nor internal ip (' . $this->getConfigInstance()->getServerAddress() . '), need to forward (not yet implemented)!');
118
119                         // This package is to be delivered to someone else, so add it
120                         $this->getListInstance()->addEntry('ip_port', $decodedData[NetworkPackage::PACKAGE_DATA_RECIPIENT]);
121                 }
122         }
123
124         /**
125          * "Getter" for recipient iterator
126          *
127          * @return      $iteratorInstance       An instance of a Iterateable object
128          */
129         public function getIterator () {
130                 // Get iterator from it
131                 $iteratorInstance = $this->getListInstance()->getIterator();
132
133                 // Return it
134                 return $iteratorInstance;
135         }
136
137         /**
138          * Checks whether the recipient list is empty
139          *
140          * @return      $isEmpty        Whether the recipient list is empty
141          */
142         public function isRecipientListEmpty () {
143                 // Check it ...
144                 $isEmpty = ($this->getListInstance()->count() == 0);
145
146                 // Return it
147                 return $isEmpty;
148         }
149
150         /**
151          * Clears all recipients for e.g. another package to deliver. This method
152          * simply clears the inner list instance.
153          *
154          * @return      void
155          */
156         public function clearRecipients () {
157                 // Clear the list
158                 $this->getListInstance()->clearList();
159         }
160 }
161
162 // [EOF]
163 ?>