3 // +----------------------------------------------------------------------+
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5 // +----------------------------------------------------------------------+
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6 // | Copyright (c) 1997-2003 The PHP Group |
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7 // +----------------------------------------------------------------------+
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8 // | This source file is subject to version 2.0 of the PHP license, |
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9 // | that is bundled with this package in the file LICENSE, and is |
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10 // | available at through the world-wide-web at |
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11 // | http://www.php.net/license/2_02.txt. |
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12 // | If you did not receive a copy of the PHP license and are unable to |
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13 // | obtain it through the world-wide-web, please send a note to |
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14 // | license@php.net so we can mail you a copy immediately. |
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15 // +----------------------------------------------------------------------+
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16 // | Authors: Stig Bakken <ssb@php.net> |
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17 // | Chuck Hagenbuch <chuck@horde.org> |
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18 // +----------------------------------------------------------------------+
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20 // $Id: Socket.php,v 1.8 2006/11/27 17:14:39 hsur Exp $
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22 require_once 'PEAR.php';
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24 define('NET_SOCKET_READ', 1);
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25 define('NET_SOCKET_WRITE', 2);
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26 define('NET_SOCKET_ERROR', 3);
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29 * Generalized Socket class.
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32 * @author Stig Bakken <ssb@php.net>
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33 * @author Chuck Hagenbuch <chuck@horde.org>
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35 class Net_Socket extends PEAR {
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38 * Socket file pointer.
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44 * Whether the socket is blocking. Defaults to true.
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45 * @var boolean $blocking
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47 var $blocking = true;
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50 * Whether the socket is persistent. Defaults to false.
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51 * @var boolean $persistent
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53 var $persistent = false;
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56 * The IP address to connect to.
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62 * The port number to connect to.
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63 * @var integer $port
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68 * Number of seconds to wait on socket connections before assuming
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69 * there's no more data. Defaults to no timeout.
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70 * @var integer $timeout
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72 var $timeout = false;
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75 * Number of bytes to read at a time in readLine() and
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76 * readAll(). Defaults to 2048.
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77 * @var integer $lineLength
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79 var $lineLength = 2048;
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82 * Connect to the specified port. If called when the socket is
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83 * already connected, it disconnects and connects again.
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85 * @param string $addr IP address or host name.
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86 * @param integer $port TCP port number.
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87 * @param boolean $persistent (optional) Whether the connection is
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88 * persistent (kept open between requests
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89 * by the web server).
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90 * @param integer $timeout (optional) How long to wait for data.
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91 * @param array $options See options for stream_context_create.
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95 * @return boolean | PEAR_Error True on success or a PEAR_Error on failure.
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97 function connect($addr, $port = 0, $persistent = null, $timeout = null, $options = null)
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99 if (is_resource($this->fp)) {
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100 @fclose($this->fp);
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105 return $this->raiseError('$addr cannot be empty');
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106 } elseif (strspn($addr, '.0123456789') == strlen($addr) ||
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107 strstr($addr, '/') !== false) {
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108 $this->addr = $addr;
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110 $this->addr = @gethostbyname($addr);
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113 $this->port = $port % 65536;
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115 if ($persistent !== null) {
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116 $this->persistent = $persistent;
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119 if ($timeout !== null) {
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120 $this->timeout = $timeout;
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123 $openfunc = $this->persistent ? 'pfsockopen' : 'fsockopen';
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126 if ($options && function_exists('stream_context_create')) {
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127 if ($this->timeout) {
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128 $timeout = $this->timeout;
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132 $context = stream_context_create($options);
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133 $fp = @$openfunc($this->addr, $this->port, $errno, $errstr, $timeout, $context);
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135 if ($this->timeout) {
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136 $fp = @$openfunc($this->addr, $this->port, $errno, $errstr, $this->timeout);
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138 $fp = @$openfunc($this->addr, $this->port, $errno, $errstr);
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143 return $this->raiseError($errstr, $errno);
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148 return $this->setBlocking($this->blocking);
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152 * Disconnects from the peer, closes the socket.
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155 * @return mixed true on success or an error object otherwise
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157 function disconnect()
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159 if (!is_resource($this->fp)) {
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160 return $this->raiseError('not connected');
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163 @fclose($this->fp);
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169 * Find out if the socket is in blocking mode.
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172 * @return boolean The current blocking mode.
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174 function isBlocking()
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176 return $this->blocking;
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180 * Sets whether the socket connection should be blocking or
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181 * not. A read call to a non-blocking socket will return immediately
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182 * if there is no data available, whereas it will block until there
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183 * is data for blocking sockets.
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185 * @param boolean $mode True for blocking sockets, false for nonblocking.
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187 * @return mixed true on success or an error object otherwise
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189 function setBlocking($mode)
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191 if (!is_resource($this->fp)) {
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192 return $this->raiseError('not connected');
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195 $this->blocking = $mode;
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196 socket_set_blocking($this->fp, $this->blocking);
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201 * Sets the timeout value on socket descriptor,
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202 * expressed in the sum of seconds and microseconds
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204 * @param integer $seconds Seconds.
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205 * @param integer $microseconds Microseconds.
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207 * @return mixed true on success or an error object otherwise
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209 function setTimeout($seconds, $microseconds)
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211 if (!is_resource($this->fp)) {
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212 return $this->raiseError('not connected');
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215 return socket_set_timeout($this->fp, $seconds, $microseconds);
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219 * Returns information about an existing socket resource.
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220 * Currently returns four entries in the result array:
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223 * timed_out (bool) - The socket timed out waiting for data<br>
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224 * blocked (bool) - The socket was blocked<br>
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225 * eof (bool) - Indicates EOF event<br>
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226 * unread_bytes (int) - Number of bytes left in the socket buffer<br>
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230 * @return mixed Array containing information about existing socket resource or an error object otherwise
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232 function getStatus()
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234 if (!is_resource($this->fp)) {
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235 return $this->raiseError('not connected');
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238 return socket_get_status($this->fp);
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242 * Get a specified line of data
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245 * @return $size bytes of data from the socket, or a PEAR_Error if
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248 function gets($size)
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250 if (!is_resource($this->fp)) {
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251 return $this->raiseError('not connected');
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254 return @fgets($this->fp, $size);
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258 * Read a specified amount of data. This is guaranteed to return,
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259 * and has the added benefit of getting everything in one fread()
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260 * chunk; if you know the size of the data you're getting
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261 * beforehand, this is definitely the way to go.
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263 * @param integer $size The number of bytes to read from the socket.
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265 * @return $size bytes of data from the socket, or a PEAR_Error if
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268 function read($size)
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270 if (!is_resource($this->fp)) {
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271 return $this->raiseError('not connected');
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274 return @fread($this->fp, $size);
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278 * Write a specified amount of data.
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280 * @param string $data Data to write.
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281 * @param integer $blocksize Amount of data to write at once.
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282 * NULL means all at once.
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285 * @return mixed true on success or an error object otherwise
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287 function write($data, $blocksize = null)
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289 if (!is_resource($this->fp)) {
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290 return $this->raiseError('not connected');
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293 if (is_null($blocksize) && !OS_WINDOWS) {
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294 return fwrite($this->fp, $data);
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296 if (is_null($blocksize)) {
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301 $size = strlen($data);
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302 while ($pos < $size) {
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303 $written = @fwrite($this->fp, substr($data, $pos, $blocksize));
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304 if ($written === false) {
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315 * Write a line of data to the socket, followed by a trailing "\r\n".
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318 * @return mixed fputs result, or an error
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320 function writeLine($data)
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322 if (!is_resource($this->fp)) {
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323 return $this->raiseError('not connected');
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326 return fwrite($this->fp, $data . "\r\n");
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330 * Tests for end-of-file on a socket descriptor.
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337 return (is_resource($this->fp) && feof($this->fp));
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341 * Reads a byte of data
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344 * @return 1 byte of data from the socket, or a PEAR_Error if
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347 function readByte()
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349 if (!is_resource($this->fp)) {
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350 return $this->raiseError('not connected');
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353 return ord(@fread($this->fp, 1));
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357 * Reads a word of data
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360 * @return 1 word of data from the socket, or a PEAR_Error if
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363 function readWord()
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365 if (!is_resource($this->fp)) {
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366 return $this->raiseError('not connected');
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369 $buf = @fread($this->fp, 2);
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370 return (ord($buf[0]) + (ord($buf[1]) << 8));
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374 * Reads an int of data
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377 * @return integer 1 int of data from the socket, or a PEAR_Error if
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382 if (!is_resource($this->fp)) {
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383 return $this->raiseError('not connected');
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386 $buf = @fread($this->fp, 4);
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387 return (ord($buf[0]) + (ord($buf[1]) << 8) +
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388 (ord($buf[2]) << 16) + (ord($buf[3]) << 24));
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392 * Reads a zero-terminated string of data
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395 * @return string, or a PEAR_Error if
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398 function readString()
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400 if (!is_resource($this->fp)) {
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401 return $this->raiseError('not connected');
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405 while (($char = @fread($this->fp, 1)) != "\x00") {
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412 * Reads an IP Address and returns it in a dot formated string
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415 * @return Dot formated string, or a PEAR_Error if
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418 function readIPAddress()
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420 if (!is_resource($this->fp)) {
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421 return $this->raiseError('not connected');
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424 $buf = @fread($this->fp, 4);
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425 return sprintf("%s.%s.%s.%s", ord($buf[0]), ord($buf[1]),
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426 ord($buf[2]), ord($buf[3]));
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430 * Read until either the end of the socket or a newline, whichever
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431 * comes first. Strips the trailing newline from the returned data.
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434 * @return All available data up to a newline, without that
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435 * newline, or until the end of the socket, or a PEAR_Error if
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438 function readLine()
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440 if (!is_resource($this->fp)) {
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441 return $this->raiseError('not connected');
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445 $timeout = time() + $this->timeout;
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446 while (!feof($this->fp) && (!$this->timeout || time() < $timeout)) {
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447 $line .= @fgets($this->fp, $this->lineLength);
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448 if (substr($line, -1) == "\n") {
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449 return rtrim($line, "\r\n");
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456 * Read until the socket closes, or until there is no more data in
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457 * the inner PHP buffer. If the inner buffer is empty, in blocking
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458 * mode we wait for at least 1 byte of data. Therefore, in
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459 * blocking mode, if there is no data at all to be read, this
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460 * function will never exit (unless the socket is closed on the
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465 * @return string All data until the socket closes, or a PEAR_Error if
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470 if (!is_resource($this->fp)) {
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471 return $this->raiseError('not connected');
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475 while (!feof($this->fp)) {
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476 $data .= @fread($this->fp, $this->lineLength);
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482 * Runs the equivalent of the select() system call on the socket
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483 * with a timeout specified by tv_sec and tv_usec.
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485 * @param integer $state Which of read/write/error to check for.
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486 * @param integer $tv_sec Number of seconds for timeout.
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487 * @param integer $tv_usec Number of microseconds for timeout.
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490 * @return False if select fails, integer describing which of read/write/error
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491 * are ready, or PEAR_Error if not connected.
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493 function select($state, $tv_sec, $tv_usec = 0)
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495 if (!is_resource($this->fp)) {
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496 return $this->raiseError('not connected');
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502 if ($state & NET_SOCKET_READ) {
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503 $read[] = $this->fp;
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505 if ($state & NET_SOCKET_WRITE) {
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506 $write[] = $this->fp;
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508 if ($state & NET_SOCKET_ERROR) {
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509 $except[] = $this->fp;
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511 if (false === ($sr = stream_select($read, $write, $except, $tv_sec, $tv_usec))) {
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516 if (count($read)) {
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517 $result |= NET_SOCKET_READ;
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519 if (count($write)) {
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520 $result |= NET_SOCKET_WRITE;
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522 if (count($except)) {
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523 $result |= NET_SOCKET_ERROR;
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