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Error code 'empty_data' is now fully removed and empty data is being silently ignored...
[hub.git] / application / hub / main / handler / network / class_BaseRawDataHandler.php
1 <?php
2 /**
3  * A general Handler for raw data from sockets
4  *
5  * @author              Roland Haeder <webmaster@ship-simu.org>
6  * @version             0.0.0
7  * @copyright   Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2012 Hub 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 BaseRawDataHandler extends BaseHandler {
25         // Error codes:
26         // - Socket raw data stream errors
27         const SOCKET_ERROR_UNKNOWN                    = 'unknown_error';              // Unknown error (should not happen)
28         const SOCKET_ERROR_TRANSPORT_ENDPOINT         = 'transport_endpoint';         // Transport endpoint has closed
29         const SOCKET_ERROR_INVALID_BASE64_MODULO      = 'base64_modulo';              // Length is not modulo 4
30         const SOCKET_ERROR_INVALID_BASE64_MESSAGE     = 'base64_message';             // Raw data is not Base64-encoded
31         const SOCKET_ERROR_UNHANDLED                  = 'unhandled_package';          // Unhandled raw data (not bad)
32         const SOCKET_ERROR_CONNECTION_REFUSED         = 'connection_refused';         // The name says it: connection refused
33         const SOCKET_ERROR_CONNECTION_TIMED_OUT       = 'connection_timed_out';       // The name says it: connection attempt has timed-out
34         const SOCKET_ERROR_OPERATION_IN_PROGRESS      = 'operation_in_progress';      // 'Operation now in progress'
35         const SOCKET_ERROR_OPERATION_ALREADY_PROGRESS = 'operation_already_progress'; // 'Operation already in progress'
36         const SOCKET_ERROR_RESOURCE_UNAVAILABLE       = 'resource_unavailable';       // 'Resource temporary unavailable'
37         const SOCKET_ERROR_NO_ROUTE_TO_HOST           = 'no_route_to_host';           // The name says it: no route to host
38         const SOCKET_CONNECTED                        = 'connected';                  // Nothing errorous happens, socket is connected
39
40         // - Package errors
41         const PACKAGE_ERROR_INVALID_DATA       = 'invalid_data';    // Invalid data in package found
42         const PACKAGE_ERROR_INCOMPLETE_DATA    = 'incomplete_data'; // Incomplete data sent (e.g. field is missing)
43         const PACKAGE_ERROR_INVALID_CONTENT    = 'invalid_content'; // Content is invalid (e.g. not well-formed)
44         const PACKAGE_ERROR_RECIPIENT_MISMATCH = 'recipient_error'; // Recipient is not us
45         const PACKAGE_LEVEL_CHECK_OKAY         = 'checked_package'; // Package is fine
46
47         // Package data
48         const PACKAGE_DECODED_DATA = 'decoded_data';
49         const PACKAGE_ERROR_CODE   = 'error_code';
50
51         /**
52          * Stacker for decoded data
53          */
54         const STACKER_NAME_DECODED_DATA = 'decoded_data';
55
56         /**
57          * Error code from socket
58          */
59         private $errorCode = -1;
60
61         /**
62          * Protected constructor
63          *
64          * @param       $className      Name of the class
65          * @return      void
66          */
67         protected function __construct ($className) {
68                 // Call parent constructor
69                 parent::__construct($className);
70
71                 // Set error code to 'unknown'
72                 $this->setErrorCode(self::SOCKET_ERROR_UNKNOWN);
73
74                 // Get an input stream instance
75                 $streamInstance = ObjectFactory::createObjectByConfiguredName('node_raw_data_input_stream_class', array($this));
76
77                 // Set it in this network-package handler
78                 $this->setInputStreamInstance($streamInstance);
79
80                 // Init stacker instance for processed raw data
81                 $stackerInstance = ObjectFactory::createObjectByConfiguredName('node_raw_data_stacker_class');
82
83                 // Remember this in this package handler
84                 $this->setStackerInstance($stackerInstance);
85
86                 // Init stacker
87                 $this->initStacker();
88         }
89
90         /**
91          * Initializes the stacker for raw data
92          *
93          * @return      void
94          */
95         protected function initStacker () {
96                 $this->getStackerInstance()->initStacker(self::STACKER_NAME_DECODED_DATA);
97         }
98
99         /**
100          * Adds given decoded data to the raw data stacker
101          *
102          * @param       $decodedData    Decoded data from the socket resource
103          * @return      void
104          */
105         protected function addDecodedDataToStacker ($decodedData) {
106                 /*
107                  * Add the deocoded data and error code to the stacker so other classes
108                  * (e.g. NetworkPackage) can "pop" it from the stacker.
109                  */
110                 $this->getStackerInstance()->pushNamed(self::STACKER_NAME_DECODED_DATA, array(
111                         self::PACKAGE_DECODED_DATA => $decodedData,
112                         self::PACKAGE_ERROR_CODE   => $this->getErrorCode()
113                 ));
114         }
115
116         /**
117          * Checks whether decoded data is pending for further processing.
118          *
119          * @return      $isPending      Whether decoded data is pending
120          */
121         public function isDecodedDataPending () {
122                 // Does the stacker have some entries (not empty)?
123                 $isPending = (!$this->getStackerInstance()->isStackEmpty(self::STACKER_NAME_DECODED_DATA));
124
125                 // Return it
126                 return $isPending;
127         }
128
129         /**
130          * "Getter" for next decoded data from the stacker
131          *
132          * @return      $decodedData    Decoded data from the stacker
133          */
134         public function getNextDecodedData () {
135                 // "Pop" the decoded data from the stacker
136                 $decodedData = $this->getStackerInstance()->popNamed(self::STACKER_NAME_DECODED_DATA);
137
138                 // And return it
139                 return $decodedData;
140         }
141
142         /**
143          * Checks whether the 'recipient' field matches our own address:port
144          * combination.
145          *
146          * @param       $packageData    Raw package data
147          * @return      $matches                Whether it matches
148          * @todo        This method will be moved to a better place
149          */
150         protected function ifRecipientMatchesOwnAddress (array $packageData) {
151                 // Construct own address first
152                 $ownAddress = Registry::getRegistry()->getInstance('node')->getAddressPort($this);
153
154                 // Does it match?
155                 $matches = ($ownAddress === $packageData[NetworkPackage::PACKAGE_DATA_RECIPIENT]);
156
157                 // Return result
158                 return $matches;
159         }
160
161         /**
162          * Setter for error code
163          *
164          * @param       $errorCode      The error code we shall set
165          * @return      void
166          */
167         public final function setErrorCode ($errorCode) {
168                 $this->errorCode = $errorCode;
169         }
170
171         /**
172          * Getter for error code
173          *
174          * @return      $errorCode      The error code
175          */
176         public final function getErrorCode () {
177                 return $this->errorCode;
178         }
179 }
180
181 // [EOF]
182 ?>