739 lines
21 KiB
PHP
739 lines
21 KiB
PHP
<?php
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/**
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* Net_Socket
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*
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* PHP Version 5
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*
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* LICENSE:
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*
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* Copyright (c) 1997-2017 The PHP Group
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* o Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* o Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* @category Net
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* @package Net_Socket
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* @author Stig Bakken <ssb@php.net>
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* @author Chuck Hagenbuch <chuck@horde.org>
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* @copyright 1997-2017 The PHP Group
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* @license http://opensource.org/licenses/bsd-license.php BSD-2-Clause
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* @link http://pear.php.net/packages/Net_Socket
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*/
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require_once 'PEAR.php';
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define('NET_SOCKET_READ', 1);
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define('NET_SOCKET_WRITE', 2);
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define('NET_SOCKET_ERROR', 4);
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/**
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* Generalized Socket class.
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*
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* @category Net
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* @package Net_Socket
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* @author Stig Bakken <ssb@php.net>
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* @author Chuck Hagenbuch <chuck@horde.org>
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* @copyright 1997-2017 The PHP Group
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* @license http://opensource.org/licenses/bsd-license.php BSD-2-Clause
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* @link http://pear.php.net/packages/Net_Socket
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*/
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class Net_Socket extends PEAR
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{
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/**
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* Socket file pointer.
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* @var resource $fp
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*/
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public $fp = null;
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/**
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* Whether the socket is blocking. Defaults to true.
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* @var boolean $blocking
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*/
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public $blocking = true;
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/**
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* Whether the socket is persistent. Defaults to false.
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* @var boolean $persistent
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*/
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public $persistent = false;
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/**
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* The IP address to connect to.
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* @var string $addr
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*/
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public $addr = '';
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/**
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* The port number to connect to.
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* @var integer $port
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*/
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public $port = 0;
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/**
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* Number of seconds to wait on socket operations before assuming
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* there's no more data. Defaults to no timeout.
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* @var integer|float $timeout
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*/
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public $timeout = null;
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/**
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* Number of bytes to read at a time in readLine() and
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* readAll(). Defaults to 2048.
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* @var integer $lineLength
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*/
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public $lineLength = 2048;
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/**
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* The string to use as a newline terminator. Usually "\r\n" or "\n".
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* @var string $newline
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*/
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public $newline = "\r\n";
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/**
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* Connect to the specified port. If called when the socket is
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* already connected, it disconnects and connects again.
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*
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* @param string $addr IP address or host name (may be with protocol prefix).
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* @param integer $port TCP port number.
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* @param boolean $persistent (optional) Whether the connection is
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* persistent (kept open between requests
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* by the web server).
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* @param integer $timeout (optional) Connection socket timeout.
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* @param array $options See options for stream_context_create.
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*
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* @access public
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*
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* @return boolean|PEAR_Error True on success or a PEAR_Error on failure.
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*/
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public function connect(
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$addr,
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$port = 0,
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$persistent = null,
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$timeout = null,
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$options = null
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) {
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if (is_resource($this->fp)) {
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@fclose($this->fp);
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$this->fp = null;
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}
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if (!$addr) {
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return $this->raiseError('$addr cannot be empty');
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} else {
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if (strspn($addr, ':.0123456789') === strlen($addr)) {
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$this->addr = strpos($addr, ':') !== false ? '[' . $addr . ']' : $addr;
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} else {
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$this->addr = $addr;
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}
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}
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$this->port = $port % 65536;
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if ($persistent !== null) {
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$this->persistent = $persistent;
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}
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$openfunc = $this->persistent ? 'pfsockopen' : 'fsockopen';
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$errno = 0;
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$errstr = '';
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if (function_exists('error_clear_last')) {
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error_clear_last();
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} else {
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$old_track_errors = @ini_set('track_errors', 1);
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}
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if ($timeout <= 0) {
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$timeout = @ini_get('default_socket_timeout');
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}
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if ($options && function_exists('stream_context_create')) {
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$context = stream_context_create($options);
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// Since PHP 5 fsockopen doesn't allow context specification
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if (function_exists('stream_socket_client')) {
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$flags = STREAM_CLIENT_CONNECT;
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if ($this->persistent) {
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$flags = STREAM_CLIENT_PERSISTENT;
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}
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$addr = $this->addr . ':' . $this->port;
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$fp = @stream_socket_client($addr, $errno, $errstr,
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$timeout, $flags, $context);
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} else {
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$fp = @$openfunc($this->addr, $this->port, $errno,
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$errstr, $timeout, $context);
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}
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} else {
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$fp = @$openfunc($this->addr, $this->port, $errno, $errstr, $timeout);
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}
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if (!$fp) {
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if ($errno === 0 && !strlen($errstr)) {
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$errstr = '';
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if (isset($old_track_errors)) {
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$errstr = $php_errormsg ?: '';
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@ini_set('track_errors', $old_track_errors);
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} else {
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$lastError = error_get_last();
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if (isset($lastError['message'])) {
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$errstr = $lastError['message'];
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}
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}
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}
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return $this->raiseError($errstr, $errno);
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}
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if (isset($old_track_errors)) {
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@ini_set('track_errors', $old_track_errors);
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}
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$this->fp = $fp;
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$this->setTimeout();
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return $this->setBlocking($this->blocking);
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}
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/**
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* Disconnects from the peer, closes the socket.
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*
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* @access public
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* @return mixed true on success or a PEAR_Error instance otherwise
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*/
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public function disconnect()
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{
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if (!is_resource($this->fp)) {
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return $this->raiseError('not connected');
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}
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@fclose($this->fp);
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$this->fp = null;
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return true;
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}
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/**
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* Set the newline character/sequence to use.
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*
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* @param string $newline Newline character(s)
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* @return boolean True
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*/
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public function setNewline($newline)
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{
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$this->newline = $newline;
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return true;
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}
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/**
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* Find out if the socket is in blocking mode.
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*
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* @access public
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* @return boolean The current blocking mode.
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*/
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public function isBlocking()
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{
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return $this->blocking;
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}
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/**
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* Sets whether the socket connection should be blocking or
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* not. A read call to a non-blocking socket will return immediately
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* if there is no data available, whereas it will block until there
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* is data for blocking sockets.
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*
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* @param boolean $mode True for blocking sockets, false for nonblocking.
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*
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* @access public
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* @return mixed true on success or a PEAR_Error instance otherwise
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*/
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public function setBlocking($mode)
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{
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if (!is_resource($this->fp)) {
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return $this->raiseError('not connected');
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}
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$this->blocking = $mode;
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stream_set_blocking($this->fp, (int)$this->blocking);
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return true;
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}
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/**
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* Sets the timeout value on socket descriptor,
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* expressed in the sum of seconds and microseconds
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*
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* @param integer $seconds Seconds.
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* @param integer $microseconds Microseconds, optional.
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*
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* @access public
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* @return mixed True on success or false on failure or
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* a PEAR_Error instance when not connected
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*/
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public function setTimeout($seconds = null, $microseconds = null)
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{
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if (!is_resource($this->fp)) {
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return $this->raiseError('not connected');
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}
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if ($seconds === null && $microseconds === null) {
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$seconds = (int)$this->timeout;
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$microseconds = (int)(($this->timeout - $seconds) * 1000000);
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} else {
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$this->timeout = $seconds + $microseconds / 1000000;
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}
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if ($this->timeout > 0) {
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return stream_set_timeout($this->fp, (int)$seconds, (int)$microseconds);
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} else {
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return false;
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}
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}
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/**
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* Sets the file buffering size on the stream.
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* See php's stream_set_write_buffer for more information.
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*
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* @param integer $size Write buffer size.
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*
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* @access public
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* @return mixed on success or an PEAR_Error object otherwise
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*/
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public function setWriteBuffer($size)
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{
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if (!is_resource($this->fp)) {
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return $this->raiseError('not connected');
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}
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$returned = stream_set_write_buffer($this->fp, $size);
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if ($returned === 0) {
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return true;
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}
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return $this->raiseError('Cannot set write buffer.');
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}
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/**
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* Returns information about an existing socket resource.
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* Currently returns four entries in the result array:
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*
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* <p>
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* timed_out (bool) - The socket timed out waiting for data<br>
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* blocked (bool) - The socket was blocked<br>
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* eof (bool) - Indicates EOF event<br>
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* unread_bytes (int) - Number of bytes left in the socket buffer<br>
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* </p>
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*
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* @access public
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* @return mixed Array containing information about existing socket
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* resource or a PEAR_Error instance otherwise
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*/
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public function getStatus()
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{
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if (!is_resource($this->fp)) {
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return $this->raiseError('not connected');
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}
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return stream_get_meta_data($this->fp);
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}
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/**
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* Get a specified line of data
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*
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* @param int $size Reading ends when size - 1 bytes have been read,
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* or a newline or an EOF (whichever comes first).
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* If no size is specified, it will keep reading from
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* the stream until it reaches the end of the line.
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*
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* @access public
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* @return mixed $size bytes of data from the socket, or a PEAR_Error if
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* not connected. If an error occurs, FALSE is returned.
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*/
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public function gets($size = null)
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{
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if (!is_resource($this->fp)) {
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return $this->raiseError('not connected');
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}
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if (null === $size) {
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return @fgets($this->fp);
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} else {
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return @fgets($this->fp, $size);
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}
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}
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/**
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* Read a specified amount of data. This is guaranteed to return,
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* and has the added benefit of getting everything in one fread()
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* chunk; if you know the size of the data you're getting
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* beforehand, this is definitely the way to go.
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*
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* @param integer $size The number of bytes to read from the socket.
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*
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* @access public
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* @return string $size bytes of data from the socket, or a PEAR_Error if
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* not connected.
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*/
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public function read($size)
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{
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if (!is_resource($this->fp)) {
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return $this->raiseError('not connected');
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}
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return @fread($this->fp, $size);
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}
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/**
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* Write a specified amount of data.
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*
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* @param string $data Data to write.
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* @param integer $blocksize Amount of data to write at once.
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* NULL means all at once.
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*
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* @access public
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* @return mixed If the socket is not connected, returns an instance of
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* PEAR_Error.
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* If the write succeeds, returns the number of bytes written.
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* If the write fails, returns false.
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* If the socket times out, returns an instance of PEAR_Error.
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*/
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public function write($data, $blocksize = null)
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{
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if (!is_resource($this->fp)) {
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return $this->raiseError('not connected');
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}
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if (null === $blocksize && !OS_WINDOWS) {
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$written = @fwrite($this->fp, $data);
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// Check for timeout or lost connection
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if ($written === false) {
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$meta_data = $this->getStatus();
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if (!is_array($meta_data)) {
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return $meta_data; // PEAR_Error
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}
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if (!empty($meta_data['timed_out'])) {
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return $this->raiseError('timed out');
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}
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}
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return $written;
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} else {
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if (null === $blocksize) {
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$blocksize = 1024;
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}
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$pos = 0;
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$size = strlen($data);
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while ($pos < $size) {
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$written = @fwrite($this->fp, substr($data, $pos, $blocksize));
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// Check for timeout or lost connection
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if ($written === false) {
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$meta_data = $this->getStatus();
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|
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if (!is_array($meta_data)) {
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return $meta_data; // PEAR_Error
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}
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|
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if (!empty($meta_data['timed_out'])) {
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return $this->raiseError('timed out');
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}
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return $written;
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}
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|
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$pos += $written;
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}
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|
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return $pos;
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}
|
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}
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|
|
|
/**
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* Write a line of data to the socket, followed by a trailing newline.
|
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*
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* @param string $data Data to write
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*
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* @access public
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* @return mixed fwrite() result, or PEAR_Error when not connected
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*/
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public function writeLine($data)
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{
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if (!is_resource($this->fp)) {
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return $this->raiseError('not connected');
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}
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|
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return fwrite($this->fp, $data . $this->newline);
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}
|
|
|
|
/**
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|
* Tests for end-of-file on a socket descriptor.
|
|
*
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* Also returns true if the socket is disconnected.
|
|
*
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* @access public
|
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* @return bool
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*/
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|
public function eof()
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{
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return (!is_resource($this->fp) || feof($this->fp));
|
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}
|
|
|
|
/**
|
|
* Reads a byte of data
|
|
*
|
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* @access public
|
|
* @return integer 1 byte of data from the socket, or a PEAR_Error if
|
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* not connected.
|
|
*/
|
|
public function readByte()
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{
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if (!is_resource($this->fp)) {
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return $this->raiseError('not connected');
|
|
}
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|
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return ord(@fread($this->fp, 1));
|
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}
|
|
|
|
/**
|
|
* Reads a word of data
|
|
*
|
|
* @access public
|
|
* @return integer 1 word of data from the socket, or a PEAR_Error if
|
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* not connected.
|
|
*/
|
|
public function readWord()
|
|
{
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if (!is_resource($this->fp)) {
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return $this->raiseError('not connected');
|
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}
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|
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$buf = @fread($this->fp, 2);
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return (ord($buf[0]) + (ord($buf[1]) << 8));
|
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}
|
|
|
|
/**
|
|
* Reads an int of data
|
|
*
|
|
* @access public
|
|
* @return integer 1 int of data from the socket, or a PEAR_Error if
|
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* not connected.
|
|
*/
|
|
public function readInt()
|
|
{
|
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if (!is_resource($this->fp)) {
|
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return $this->raiseError('not connected');
|
|
}
|
|
|
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$buf = @fread($this->fp, 4);
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|
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return (ord($buf[0]) + (ord($buf[1]) << 8) +
|
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(ord($buf[2]) << 16) + (ord($buf[3]) << 24));
|
|
}
|
|
|
|
/**
|
|
* Reads a zero-terminated string of data
|
|
*
|
|
* @access public
|
|
* @return string, or a PEAR_Error if
|
|
* not connected.
|
|
*/
|
|
public function readString()
|
|
{
|
|
if (!is_resource($this->fp)) {
|
|
return $this->raiseError('not connected');
|
|
}
|
|
|
|
$string = '';
|
|
while (($char = @fread($this->fp, 1)) !== "\x00") {
|
|
$string .= $char;
|
|
}
|
|
|
|
return $string;
|
|
}
|
|
|
|
/**
|
|
* Reads an IP Address and returns it in a dot formatted string
|
|
*
|
|
* @access public
|
|
* @return string Dot formatted string, or a PEAR_Error if
|
|
* not connected.
|
|
*/
|
|
public function readIPAddress()
|
|
{
|
|
if (!is_resource($this->fp)) {
|
|
return $this->raiseError('not connected');
|
|
}
|
|
|
|
$buf = @fread($this->fp, 4);
|
|
|
|
return sprintf('%d.%d.%d.%d', ord($buf[0]), ord($buf[1]),
|
|
ord($buf[2]), ord($buf[3]));
|
|
}
|
|
|
|
/**
|
|
* Read until either the end of the socket or a newline, whichever
|
|
* comes first. Strips the trailing newline from the returned data.
|
|
*
|
|
* @access public
|
|
* @return string All available data up to a newline, without that
|
|
* newline, or until the end of the socket, or a PEAR_Error if
|
|
* not connected.
|
|
*/
|
|
public function readLine()
|
|
{
|
|
if (!is_resource($this->fp)) {
|
|
return $this->raiseError('not connected');
|
|
}
|
|
|
|
$line = '';
|
|
|
|
$timeout = time() + $this->timeout;
|
|
|
|
while (!feof($this->fp) && (!$this->timeout || time() < $timeout)) {
|
|
$line .= @fgets($this->fp, $this->lineLength);
|
|
if (substr($line, -1) == "\n") {
|
|
return rtrim($line, $this->newline);
|
|
}
|
|
}
|
|
|
|
return $line;
|
|
}
|
|
|
|
/**
|
|
* Read until the socket closes, or until there is no more data in
|
|
* the inner PHP buffer. If the inner buffer is empty, in blocking
|
|
* mode we wait for at least 1 byte of data. Therefore, in
|
|
* blocking mode, if there is no data at all to be read, this
|
|
* function will never exit (unless the socket is closed on the
|
|
* remote end).
|
|
*
|
|
* @access public
|
|
*
|
|
* @return string All data until the socket closes, or a PEAR_Error if
|
|
* not connected.
|
|
*/
|
|
public function readAll()
|
|
{
|
|
if (!is_resource($this->fp)) {
|
|
return $this->raiseError('not connected');
|
|
}
|
|
|
|
$data = '';
|
|
$timeout = time() + $this->timeout;
|
|
|
|
while (!feof($this->fp) && (!$this->timeout || time() < $timeout)) {
|
|
$data .= @fread($this->fp, $this->lineLength);
|
|
}
|
|
|
|
return $data;
|
|
}
|
|
|
|
/**
|
|
* Runs the equivalent of the select() system call on the socket
|
|
* with a timeout specified by tv_sec and tv_usec.
|
|
*
|
|
* @param integer $state Which of read/write/error to check for.
|
|
* @param integer $tv_sec Number of seconds for timeout.
|
|
* @param integer $tv_usec Number of microseconds for timeout.
|
|
*
|
|
* @access public
|
|
* @return False if select fails, integer describing which of read/write/error
|
|
* are ready, or PEAR_Error if not connected.
|
|
*/
|
|
public function select($state, $tv_sec, $tv_usec = 0)
|
|
{
|
|
if (!is_resource($this->fp)) {
|
|
return $this->raiseError('not connected');
|
|
}
|
|
|
|
$read = null;
|
|
$write = null;
|
|
$except = null;
|
|
if ($state & NET_SOCKET_READ) {
|
|
$read[] = $this->fp;
|
|
}
|
|
if ($state & NET_SOCKET_WRITE) {
|
|
$write[] = $this->fp;
|
|
}
|
|
if ($state & NET_SOCKET_ERROR) {
|
|
$except[] = $this->fp;
|
|
}
|
|
if (false === ($sr = stream_select($read, $write, $except,
|
|
$tv_sec, $tv_usec))
|
|
) {
|
|
return false;
|
|
}
|
|
|
|
$result = 0;
|
|
if (count($read)) {
|
|
$result |= NET_SOCKET_READ;
|
|
}
|
|
if (count($write)) {
|
|
$result |= NET_SOCKET_WRITE;
|
|
}
|
|
if (count($except)) {
|
|
$result |= NET_SOCKET_ERROR;
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Turns encryption on/off on a connected socket.
|
|
*
|
|
* @param bool $enabled Set this parameter to true to enable encryption
|
|
* and false to disable encryption.
|
|
* @param integer $type Type of encryption. See stream_socket_enable_crypto()
|
|
* for values.
|
|
*
|
|
* @see http://se.php.net/manual/en/function.stream-socket-enable-crypto.php
|
|
* @access public
|
|
* @return false on error, true on success and 0 if there isn't enough data
|
|
* and the user should try again (non-blocking sockets only).
|
|
* A PEAR_Error object is returned if the socket is not
|
|
* connected
|
|
*/
|
|
public function enableCrypto($enabled, $type)
|
|
{
|
|
if (version_compare(phpversion(), '5.1.0', '>=')) {
|
|
if (!is_resource($this->fp)) {
|
|
return $this->raiseError('not connected');
|
|
}
|
|
|
|
return @stream_socket_enable_crypto($this->fp, $enabled, $type);
|
|
} else {
|
|
$msg = 'Net_Socket::enableCrypto() requires php version >= 5.1.0';
|
|
|
|
return $this->raiseError($msg);
|
|
}
|
|
}
|
|
|
|
}
|