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libident.php

by: Gavin Brown
|
June 30, 2001

Version: 1.0.0

Type: Class

Category: Networking

License: GNU General Public License

Description: libident.php is an RFC 1413 compatible PHP4 Ident client class. The Identification Protocol (a.k.a., "ident", a.k.a., "the Ident Protocol") provides a means to determine the identity of a user of a particular TCP connection. Given a TCP port number pair, it returns a character string which identifies the owner of that connection on the server's system.



<?php

/*
	Find out more about the Ident protocol at

		http://www.ietf.org/rfc/rfc1413.txt
*/

class ident {

	var $data;
	var $int_errormsg;

	var $status = 1;

	function ident($peeraddr, $peerport, $localport) {
		$identport = 113;
		$timeout = 30;
		$socket = @fsockopen($peeraddr, $identport, $errno, $errstr, $timeout);
		if (!$socket) {
			$this->int_errormsg = "Error connecting to ident server ($peeraddr:$identport): $errstr ($errno)";
			$this->status = 0;
			return false;
		}
		@fputs($socket, "$peerport, $localport\r\n");
		$line = @fgets($socket, 512);
                $this->data['rawdata'] = $line;
		list($undef, $response) = explode(":", $line, 2);
		list($resp_type, $add_info) = explode(":", trim($response), 2);
		fclose($socket);
		if (trim($resp_type) == 'ERROR') {
			$this->int_errormsg = trim($add_info);
			$this->status = 0;
			return false;
		} elseif (trim($resp_type) == 'USERID') {
			list($os_type, $username) = explode(":", trim($add_info), 2);
			$this->data['username'] = trim($username);
			$this->data['os_type'] = trim($os_type);
			return true;
		} else {
			$this->int_errormsg = 'Unknown error';
			$this->status = 0;
			return false;
		}
	}

	function user() {
		if ($this->data['username']) {
			return $this->data['username'];
		} else {
			$this->int_errormsg = 'Server returned an error, or no query has been made yet.';
			return false;
		}
	}

	function os_type() {
		if ($this->data['os_type']) {
			return $this->data['os_type'];
		} else {
			$this->int_errormsg = 'Server returned an error, or no query has been made yet.';
			return false;
		}
	}

	function error() {
		return $this->int_errormsg;
	}

	function data($key) {
		return $this->data[$key];
	}
}

?>

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