/**
* Accept incoming client connections
*
* @return boolean True if a new connection has been accepted succesfully
*/
public function accept()
{
$rConnection = null;
/* Use parent :: accept to accept incoming connections */
if ($rConnection = @stream_socket_accept($this->m_rSocket, 0)) {
/* Get the remote hosts host en port information and split them */
$aRemoteHost = explode(':', stream_socket_get_name($rConnection, true));
/* Check if a connection from this IP is already in the CONNECTING state */
if (array_key_exists($aRemoteHost[0], WebSocketConnection::$aInConnectingState)) {
/* Queue it if so */
$this->m_aConnectionQueue[] = array('ip' => $aRemoteHost[0], 'conn' => $rConnection);
$rConnection = null;
} else {
/* Or handle it otherwise */
WebSocketConnection::$aInConnectingState[$aRemoteHost[0]] = true;
}
} else {
/* If no new connection are accepted, see if we can handshake with on old one */
foreach ($this->m_aConnectionQueue as $sKey => &$aConnection) {
/* If the previous connection from this client is no longer CONNECTING */
if (!array_key_exists($aConnection['ip'], WebSocketConnection::$aInConnectingState)) {
$rConnection = $aConnection['conn'];
WebSocketConnection::$aInConnectingState[$aConnection['ip']] = true;
/* Remove from queue */
unset($this->m_aConnectionQueue[$sKey]);
break;
}
}
/* Unset foreach reference */
unset($aConnection);
}
if ($rConnection && $rConnection !== null) {
/* If the server is using TLS, enable it on the new socket */
if ($this->m_bSecure) {
$bTlsStatus = @stream_socket_enable_crypto($rConnection, true, STREAM_CRYPTO_METHOD_TLS_SERVER);
}
/* If the TLS initializing was not succesfull, close the connection again. */
if ($this->m_bSecure && !$bTlsStatus) {
fclose($rConnection);
echo 'Terminated connection (TLS Failed)' . PHP_EOL;
return false;
}
/* Take the socket and wrap it in a nice new WebSocketConnection object */
$pNewConnection = new WebSocketConnection($rConnection, $this->m_aProtocols);
/* Put the socket in non-blocking mode so we can run multiple sockets in the
* thread */
$pNewConnection->setBlocking(false);
/* This will handle the handshake for us */
$pNewConnection->accept();
/* Call/raise the onNewConnection method/event in all observers */
$this->onNewConnection($pNewConnection);
/* YEEY! succes! */
return true;
}
/* Nothing to report */
return null;
}
