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Diffstat (limited to 'extlib/Net/Socket.php')
| -rw-r--r-- | extlib/Net/Socket.php | 592 |
1 files changed, 592 insertions, 0 deletions
diff --git a/extlib/Net/Socket.php b/extlib/Net/Socket.php new file mode 100644 index 000000000..73bb4dd11 --- /dev/null +++ b/extlib/Net/Socket.php @@ -0,0 +1,592 @@ +<?php +// +// +----------------------------------------------------------------------+ +// | PHP Version 4 | +// +----------------------------------------------------------------------+ +// | Copyright (c) 1997-2003 The PHP Group | +// +----------------------------------------------------------------------+ +// | This source file is subject to version 2.0 of the PHP license, | +// | that is bundled with this package in the file LICENSE, and is | +// | available at through the world-wide-web at | +// | http://www.php.net/license/2_02.txt. | +// | If you did not receive a copy of the PHP license and are unable to | +// | obtain it through the world-wide-web, please send a note to | +// | license@php.net so we can mail you a copy immediately. | +// +----------------------------------------------------------------------+ +// | Authors: Stig Bakken <ssb@php.net> | +// | Chuck Hagenbuch <chuck@horde.org> | +// +----------------------------------------------------------------------+ +// +// $Id: Socket.php,v 1.38 2008/02/15 18:24:17 chagenbu Exp $ + +require_once 'PEAR.php'; + +define('NET_SOCKET_READ', 1); +define('NET_SOCKET_WRITE', 2); +define('NET_SOCKET_ERROR', 4); + +/** + * Generalized Socket class. + * + * @version 1.1 + * @author Stig Bakken <ssb@php.net> + * @author Chuck Hagenbuch <chuck@horde.org> + */ +class Net_Socket extends PEAR { + + /** + * Socket file pointer. + * @var resource $fp + */ + var $fp = null; + + /** + * Whether the socket is blocking. Defaults to true. + * @var boolean $blocking + */ + var $blocking = true; + + /** + * Whether the socket is persistent. Defaults to false. + * @var boolean $persistent + */ + var $persistent = false; + + /** + * The IP address to connect to. + * @var string $addr + */ + var $addr = ''; + + /** + * The port number to connect to. + * @var integer $port + */ + var $port = 0; + + /** + * Number of seconds to wait on socket connections before assuming + * there's no more data. Defaults to no timeout. + * @var integer $timeout + */ + var $timeout = false; + + /** + * Number of bytes to read at a time in readLine() and + * readAll(). Defaults to 2048. + * @var integer $lineLength + */ + var $lineLength = 2048; + + /** + * Connect to the specified port. If called when the socket is + * already connected, it disconnects and connects again. + * + * @param string $addr IP address or host name. + * @param integer $port TCP port number. + * @param boolean $persistent (optional) Whether the connection is + * persistent (kept open between requests + * by the web server). + * @param integer $timeout (optional) How long to wait for data. + * @param array $options See options for stream_context_create. + * + * @access public + * + * @return boolean | PEAR_Error True on success or a PEAR_Error on failure. + */ + function connect($addr, $port = 0, $persistent = null, $timeout = null, $options = null) + { + if (is_resource($this->fp)) { + @fclose($this->fp); + $this->fp = null; + } + + if (!$addr) { + return $this->raiseError('$addr cannot be empty'); + } elseif (strspn($addr, '.0123456789') == strlen($addr) || + strstr($addr, '/') !== false) { + $this->addr = $addr; + } else { + $this->addr = @gethostbyname($addr); + } + + $this->port = $port % 65536; + + if ($persistent !== null) { + $this->persistent = $persistent; + } + + if ($timeout !== null) { + $this->timeout = $timeout; + } + + $openfunc = $this->persistent ? 'pfsockopen' : 'fsockopen'; + $errno = 0; + $errstr = ''; + $old_track_errors = @ini_set('track_errors', 1); + if ($options && function_exists('stream_context_create')) { + if ($this->timeout) { + $timeout = $this->timeout; + } else { + $timeout = 0; + } + $context = stream_context_create($options); + + // Since PHP 5 fsockopen doesn't allow context specification + if (function_exists('stream_socket_client')) { + $flags = $this->persistent ? STREAM_CLIENT_PERSISTENT : STREAM_CLIENT_CONNECT; + $addr = $this->addr . ':' . $this->port; + $fp = stream_socket_client($addr, $errno, $errstr, $timeout, $flags, $context); + } else { + $fp = @$openfunc($this->addr, $this->port, $errno, $errstr, $timeout, $context); + } + } else { + if ($this->timeout) { + $fp = @$openfunc($this->addr, $this->port, $errno, $errstr, $this->timeout); + } else { + $fp = @$openfunc($this->addr, $this->port, $errno, $errstr); + } + } + + if (!$fp) { + if ($errno == 0 && isset($php_errormsg)) { + $errstr = $php_errormsg; + } + @ini_set('track_errors', $old_track_errors); + return $this->raiseError($errstr, $errno); + } + + @ini_set('track_errors', $old_track_errors); + $this->fp = $fp; + + return $this->setBlocking($this->blocking); + } + + /** + * Disconnects from the peer, closes the socket. + * + * @access public + * @return mixed true on success or a PEAR_Error instance otherwise + */ + function disconnect() + { + if (!is_resource($this->fp)) { + return $this->raiseError('not connected'); + } + + @fclose($this->fp); + $this->fp = null; + return true; + } + + /** + * Find out if the socket is in blocking mode. + * + * @access public + * @return boolean The current blocking mode. + */ + function isBlocking() + { + return $this->blocking; + } + + /** + * Sets whether the socket connection should be blocking or + * not. A read call to a non-blocking socket will return immediately + * if there is no data available, whereas it will block until there + * is data for blocking sockets. + * + * @param boolean $mode True for blocking sockets, false for nonblocking. + * @access public + * @return mixed true on success or a PEAR_Error instance otherwise + */ + function setBlocking($mode) + { + if (!is_resource($this->fp)) { + return $this->raiseError('not connected'); + } + + $this->blocking = $mode; + socket_set_blocking($this->fp, $this->blocking); + return true; + } + + /** + * Sets the timeout value on socket descriptor, + * expressed in the sum of seconds and microseconds + * + * @param integer $seconds Seconds. + * @param integer $microseconds Microseconds. + * @access public + * @return mixed true on success or a PEAR_Error instance otherwise + */ + function setTimeout($seconds, $microseconds) + { + if (!is_resource($this->fp)) { + return $this->raiseError('not connected'); + } + + return socket_set_timeout($this->fp, $seconds, $microseconds); + } + + /** + * Sets the file buffering size on the stream. + * See php's stream_set_write_buffer for more information. + * + * @param integer $size Write buffer size. + * @access public + * @return mixed on success or an PEAR_Error object otherwise + */ + function setWriteBuffer($size) + { + if (!is_resource($this->fp)) { + return $this->raiseError('not connected'); + } + + $returned = stream_set_write_buffer($this->fp, $size); + if ($returned == 0) { + return true; + } + return $this->raiseError('Cannot set write buffer.'); + } + + /** + * Returns information about an existing socket resource. + * Currently returns four entries in the result array: + * + * <p> + * timed_out (bool) - The socket timed out waiting for data<br> + * blocked (bool) - The socket was blocked<br> + * eof (bool) - Indicates EOF event<br> + * unread_bytes (int) - Number of bytes left in the socket buffer<br> + * </p> + * + * @access public + * @return mixed Array containing information about existing socket resource or a PEAR_Error instance otherwise + */ + function getStatus() + { + if (!is_resource($this->fp)) { + return $this->raiseError('not connected'); + } + + return socket_get_status($this->fp); + } + + /** + * Get a specified line of data + * + * @access public + * @return $size bytes of data from the socket, or a PEAR_Error if + * not connected. + */ + function gets($size) + { + if (!is_resource($this->fp)) { + return $this->raiseError('not connected'); + } + + return @fgets($this->fp, $size); + } + + /** + * Read a specified amount of data. This is guaranteed to return, + * and has the added benefit of getting everything in one fread() + * chunk; if you know the size of the data you're getting + * beforehand, this is definitely the way to go. + * + * @param integer $size The number of bytes to read from the socket. + * @access public + * @return $size bytes of data from the socket, or a PEAR_Error if + * not connected. + */ + function read($size) + { + if (!is_resource($this->fp)) { + return $this->raiseError('not connected'); + } + + return @fread($this->fp, $size); + } + + /** + * Write a specified amount of data. + * + * @param string $data Data to write. + * @param integer $blocksize Amount of data to write at once. + * NULL means all at once. + * + * @access public + * @return mixed If the socket is not connected, returns an instance of PEAR_Error + * If the write succeeds, returns the number of bytes written + * If the write fails, returns false. + */ + function write($data, $blocksize = null) + { + if (!is_resource($this->fp)) { + return $this->raiseError('not connected'); + } + + if (is_null($blocksize) && !OS_WINDOWS) { + return @fwrite($this->fp, $data); + } else { + if (is_null($blocksize)) { + $blocksize = 1024; + } + + $pos = 0; + $size = strlen($data); + while ($pos < $size) { + $written = @fwrite($this->fp, substr($data, $pos, $blocksize)); + if ($written === false) { + return false; + } + $pos += $written; + } + + return $pos; + } + } + + /** + * Write a line of data to the socket, followed by a trailing "\r\n". + * + * @access public + * @return mixed fputs result, or an error + */ + function writeLine($data) + { + if (!is_resource($this->fp)) { + return $this->raiseError('not connected'); + } + + return fwrite($this->fp, $data . "\r\n"); + } + + /** + * Tests for end-of-file on a socket descriptor. + * + * Also returns true if the socket is disconnected. + * + * @access public + * @return bool + */ + function eof() + { + return (!is_resource($this->fp) || feof($this->fp)); + } + + /** + * Reads a byte of data + * + * @access public + * @return 1 byte of data from the socket, or a PEAR_Error if + * not connected. + */ + function readByte() + { + if (!is_resource($this->fp)) { + return $this->raiseError('not connected'); + } + + return ord(@fread($this->fp, 1)); + } + + /** + * Reads a word of data + * + * @access public + * @return 1 word of data from the socket, or a PEAR_Error if + * not connected. + */ + function readWord() + { + if (!is_resource($this->fp)) { + return $this->raiseError('not connected'); + } + + $buf = @fread($this->fp, 2); + return (ord($buf[0]) + (ord($buf[1]) << 8)); + } + + /** + * Reads an int of data + * + * @access public + * @return integer 1 int of data from the socket, or a PEAR_Error if + * not connected. + */ + function readInt() + { + if (!is_resource($this->fp)) { + return $this->raiseError('not connected'); + } + + $buf = @fread($this->fp, 4); + return (ord($buf[0]) + (ord($buf[1]) << 8) + + (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. + */ + function readString() + { + if (!is_resource($this->fp)) { + return $this->raiseError('not connected'); + } + + $string = ''; + while (($char = @fread($this->fp, 1)) != "\x00") { + $string .= $char; + } + return $string; + } + + /** + * Reads an IP Address and returns it in a dot formatted string + * + * @access public + * @return Dot formatted string, or a PEAR_Error if + * not connected. + */ + function readIPAddress() + { + if (!is_resource($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 All available data up to a newline, without that + * newline, or until the end of the socket, or a PEAR_Error if + * not connected. + */ + 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, "\r\n"); + } + } + return $line; + } + + /** + * Read until the socket closes, or until there is no more data in + * the inner PHP buffer. If the inner buffer is empty, in blocking + * mode we wait for at least 1 byte of data. Therefore, in + * blocking mode, if there is no data at all to be read, this + * function will never exit (unless the socket is closed on the + * remote end). + * + * @access public + * + * @return string All data until the socket closes, or a PEAR_Error if + * not connected. + */ + function readAll() + { + if (!is_resource($this->fp)) { + return $this->raiseError('not connected'); + } + + $data = ''; + while (!feof($this->fp)) { + $data .= @fread($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 $tv_usec Number of microseconds for timeout. + * + * @access public + * @return False if select fails, integer describing which of read/write/error + * are ready, or PEAR_Error if not connected. + */ + function select($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 $type Type of encryption. See + * http://se.php.net/manual/en/function.stream-socket-enable-crypto.php for values. + * + * @access public + * @return false on error, true on success and 0 if there isn't enough data and the + * user should try again (non-blocking sockets only). A PEAR_Error object + * is returned if the socket is not connected + */ + function enableCrypto($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 { + return $this->raiseError('Net_Socket::enableCrypto() requires php version >= 5.1.0'); + } + } + +} |