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<?php
/* EPP Client class for PHP, Copyright 2005 CentralNic Ltd
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/**
* Low-level functions useful for both EPP clients and servers
* @package Net_EPP
* @version 0.0.4
* @author Gavin Brown <gavin.brown@nospam.centralnic.com>
* @revision $Id: Protocol.php,v 1.4 2011/06/28 09:48:02 gavin Exp $
*/
require_once('PEAR.php');
/**
* Low-level functions useful for both EPP clients and servers
* @package Net_EPP
*/
class Net_EPP_Protocol {
/**
* get an EPP frame from the remote peer
* @param resource $socket a socket connected to the remote peer
* @return PEAR_Error|string either an error or a string
*/
static function getFrame($socket) {
if (@feof($socket)) return new PEAR_Error('connection closed (socket is EOF)');
$hdr = @fread($socket, 4);
if (empty($hdr) && feof($socket)) {
return new PEAR_Error('connection closed (no header received and socket is EOF)');
} elseif (false === $hdr) {
return new PEAR_Error('Error reading from peer: '.$php_errormsg);
} else {
$unpacked = unpack('N', $hdr);
$length = $unpacked[1];
if ($length < 5) {
return new PEAR_Error(sprintf('Got a bad frame header length of %d bytes from peer', $length));
} else {
$length -= 4; // discard the length of the header itself
// sometimes the socket can be buffered with a limit below the frame
// length, so we continually read from the socket until we get the full frame:
$frame = '';
while (strlen($frame) < $length) $frame .= fread($socket, ($length));
if (strlen($frame) > $length) {
return new PEAR_Error(sprintf("Frame length (%d bytes) doesn't match header (%d bytes)", strlen($frame), ($length)));
} else {
return $frame;
}
}
}
}
/**
* send an EPP frame to the remote peer
* @param resource $socket a socket connected to the remote peer
* @param string $xml the XML to send
*/
static function sendFrame($socket, $xml) {
fwrite($socket, pack('N', (strlen($xml)+4)).$xml);
}
}