friendship ended with social-app. php is my new best friend
veryroundbird.house
1<?php
2
3namespace React\Socket;
4
5use Evenement\EventEmitter;
6use React\EventLoop\LoopInterface;
7use React\Stream\DuplexResourceStream;
8use React\Stream\Util;
9use React\Stream\WritableResourceStream;
10use React\Stream\WritableStreamInterface;
11
12/**
13 * The actual connection implementation for ConnectionInterface
14 *
15 * This class should only be used internally, see ConnectionInterface instead.
16 *
17 * @see ConnectionInterface
18 * @internal
19 */
20class Connection extends EventEmitter implements ConnectionInterface
21{
22 /**
23 * Internal flag whether this is a Unix domain socket (UDS) connection
24 *
25 * @internal
26 */
27 public $unix = false;
28
29 /**
30 * Internal flag whether encryption has been enabled on this connection
31 *
32 * Mostly used by internal StreamEncryption so that connection returns
33 * `tls://` scheme for encrypted connections instead of `tcp://`.
34 *
35 * @internal
36 */
37 public $encryptionEnabled = false;
38
39 /** @internal */
40 public $stream;
41
42 private $input;
43
44 public function __construct($resource, LoopInterface $loop)
45 {
46 // PHP < 7.3.3 (and PHP < 7.2.15) suffers from a bug where feof() might
47 // block with 100% CPU usage on fragmented TLS records.
48 // We try to work around this by always consuming the complete receive
49 // buffer at once to avoid stale data in TLS buffers. This is known to
50 // work around high CPU usage for well-behaving peers, but this may
51 // cause very large data chunks for high throughput scenarios. The buggy
52 // behavior can still be triggered due to network I/O buffers or
53 // malicious peers on affected versions, upgrading is highly recommended.
54 // @link https://bugs.php.net/bug.php?id=77390
55 $clearCompleteBuffer = \PHP_VERSION_ID < 70215 || (\PHP_VERSION_ID >= 70300 && \PHP_VERSION_ID < 70303);
56
57 // PHP < 7.1.4 (and PHP < 7.0.18) suffers from a bug when writing big
58 // chunks of data over TLS streams at once.
59 // We try to work around this by limiting the write chunk size to 8192
60 // bytes for older PHP versions only.
61 // This is only a work-around and has a noticable performance penalty on
62 // affected versions. Please update your PHP version.
63 // This applies to all streams because TLS may be enabled later on.
64 // See https://github.com/reactphp/socket/issues/105
65 $limitWriteChunks = (\PHP_VERSION_ID < 70018 || (\PHP_VERSION_ID >= 70100 && \PHP_VERSION_ID < 70104));
66
67 $this->input = new DuplexResourceStream(
68 $resource,
69 $loop,
70 $clearCompleteBuffer ? -1 : null,
71 new WritableResourceStream($resource, $loop, null, $limitWriteChunks ? 8192 : null)
72 );
73
74 $this->stream = $resource;
75
76 Util::forwardEvents($this->input, $this, array('data', 'end', 'error', 'close', 'pipe', 'drain'));
77
78 $this->input->on('close', array($this, 'close'));
79 }
80
81 public function isReadable()
82 {
83 return $this->input->isReadable();
84 }
85
86 public function isWritable()
87 {
88 return $this->input->isWritable();
89 }
90
91 public function pause()
92 {
93 $this->input->pause();
94 }
95
96 public function resume()
97 {
98 $this->input->resume();
99 }
100
101 public function pipe(WritableStreamInterface $dest, array $options = array())
102 {
103 return $this->input->pipe($dest, $options);
104 }
105
106 public function write($data)
107 {
108 return $this->input->write($data);
109 }
110
111 public function end($data = null)
112 {
113 $this->input->end($data);
114 }
115
116 public function close()
117 {
118 $this->input->close();
119 $this->handleClose();
120 $this->removeAllListeners();
121 }
122
123 public function handleClose()
124 {
125 if (!\is_resource($this->stream)) {
126 return;
127 }
128
129 // Try to cleanly shut down socket and ignore any errors in case other
130 // side already closed. Underlying Stream implementation will take care
131 // of closing stream resource, so we otherwise keep this open here.
132 @\stream_socket_shutdown($this->stream, \STREAM_SHUT_RDWR);
133 }
134
135 public function getRemoteAddress()
136 {
137 if (!\is_resource($this->stream)) {
138 return null;
139 }
140
141 return $this->parseAddress(\stream_socket_get_name($this->stream, true));
142 }
143
144 public function getLocalAddress()
145 {
146 if (!\is_resource($this->stream)) {
147 return null;
148 }
149
150 return $this->parseAddress(\stream_socket_get_name($this->stream, false));
151 }
152
153 private function parseAddress($address)
154 {
155 if ($address === false) {
156 return null;
157 }
158
159 if ($this->unix) {
160 // remove trailing colon from address for HHVM < 3.19: https://3v4l.org/5C1lo
161 // note that technically ":" is a valid address, so keep this in place otherwise
162 if (\substr($address, -1) === ':' && \defined('HHVM_VERSION_ID') && \HHVM_VERSION_ID < 31900) {
163 $address = (string)\substr($address, 0, -1); // @codeCoverageIgnore
164 }
165
166 // work around unknown addresses should return null value: https://3v4l.org/5C1lo and https://bugs.php.net/bug.php?id=74556
167 // PHP uses "\0" string and HHVM uses empty string (colon removed above)
168 if ($address === '' || $address[0] === "\x00" ) {
169 return null; // @codeCoverageIgnore
170 }
171
172 return 'unix://' . $address;
173 }
174
175 // check if this is an IPv6 address which includes multiple colons but no square brackets
176 $pos = \strrpos($address, ':');
177 if ($pos !== false && \strpos($address, ':') < $pos && \substr($address, 0, 1) !== '[') {
178 $address = '[' . \substr($address, 0, $pos) . ']:' . \substr($address, $pos + 1); // @codeCoverageIgnore
179 }
180
181 return ($this->encryptionEnabled ? 'tls' : 'tcp') . '://' . $address;
182 }
183}