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<?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');
}
}
}
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