| // | Chuck Hagenbuch | // +----------------------------------------------------------------------+ // // $Id$ require_once 'PEAR.php'; define('NET_SOCKET_READ', 1); define('NET_SOCKET_WRITE', 2); define('NET_SOCKET_ERROR', 3); /** * Generalized Socket class. * * @version 1.1 * @author Stig Bakken * @author Chuck Hagenbuch */ 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; $errstr = ''; if ($options && function_exists('stream_context_create')) { if ($this->timeout) { $timeout = $this->timeout; } else { $timeout = 0; } $context = stream_context_create($options); $fp = @$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) { return $this->raiseError($errstr, $errno); } $this->fp = $fp; return $this->setBlocking($this->blocking); } /** * Disconnects from the peer, closes the socket. * * @access public * @return mixed true on success or an error object 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 $mode True for blocking sockets, false for nonblocking. * @access public * @return mixed true on success or an error object otherwise */ function setBlocking($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 $microseconds Microseconds. * @access public * @return mixed true on success or an error object otherwise */ function setTimeout($seconds, $microseconds) { if (!is_resource($this->fp)) { return $this->raiseError('not connected'); } return socket_set_timeout($this->fp, $seconds, $microseconds); } /** * Returns information about an existing socket resource. * Currently returns four entries in the result array: * *

* timed_out (bool) - The socket timed out waiting for data
* blocked (bool) - The socket was blocked
* eof (bool) - Indicates EOF event
* unread_bytes (int) - Number of bytes left in the socket buffer
*

* * @access public * @return mixed Array containing information about existing socket resource or an error object 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 $blocksize Amount of data to write at once. * NULL means all at once. * * @access public * @return mixed true on success or an error object otherwise */ function write($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, $data . "\r\n"); } /** * Tests for end-of-file on a socket descriptor. * * @access public * @return bool */ function eof() { return (is_resource($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 $string; } /** * Reads an IP Address and returns it in a dot formated string * * @access public * @return Dot formated string, or a PEAR_Error if * not connected. */ function readIPAddress() { if (!is_resource($this->fp)) { return $this->raiseError('not connected'); } $buf = @fread($this->fp, 4); return sprintf("%s.%s.%s.%s", 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; } }