public function parse($bytes)
{
$m = new EDSS1_Message();
- $m->type = ord($bytes{7});
+ $m->sapi = ord($bytes{0}) >> 2;
+ $m->callResponse = (int) ((ord($bytes{0}) & 2) == 2);
+ $m->tei = ord($bytes{1}) >> 1;
+
+ $curpos = 4;
+ list($curpos, $cCallRef, $crLen) = $this->readLengthData($bytes, ++$curpos);
+ if ($crLen == 0xFF) {
+ return $m;
+ }
+ if ($crLen > 0) {
+ $m->callRefType = ord($cCallRef{0}) >> 7;
+ $nCallRef = ord($cCallRef{0}) & 127;
+ if ($crLen > 1) {
+ $nCallRef = ord($cCallRef{1}) + ($nCallRef << 8);
+ if ($crLen > 2) {
+ $nCallRef = ord($cCallRef{2}) + ($nCallRef << 8);
+ }
+ }
+ $m->callRef = $nCallRef;
+ }
+ $m->type = ord($bytes{++$curpos});
- $curpos = 7;
$complete = false;
do {
//parameter type
$complete = true;
break;
}
- $param = new EDSS1_Parameter();
+
+ $paramType = ord($curbit);
+ $param = $this->getParameterByType($paramType);
$m->parameters[] = $param;
- $param->type = ord($curbit);
//parameter length
$curbit = $bytes{++$curpos};
$param->length = ord($curbit);
//parameter data
- $param->data = substr($bytes, $curpos + 1, $param->length);
+ $param->setData(substr($bytes, $curpos + 1, $param->length));
$curpos += $param->length;
} while ($curpos < strlen($bytes) - 1);
return $m;
}
+
+ /**
+ * Read a datablock preceded with a length byte.
+ *
+ * @return array Array with new cursor position, data and data length
+ */
+ public function readLengthData($bytes, $curpos)
+ {
+ //var_dump('old' . $curpos);
+ $length = ord($bytes{$curpos});
+ if ($length != 0xFF) {
+ $data = substr($bytes, $curpos + 1, $length);
+ } else {
+ $data = null;
+ }
+ return array($curpos + $length, $data, $length);
+ }
+
+ /**
+ * @param integer $type Parameter type ID
+ */
+ public function getParameterByType($type)
+ {
+ $supported = array(0x28, 0x2C, 0x4C, 0x6C, 0x70);
+ if (!in_array($type, $supported)) {
+ return new EDSS1_Parameter($type);
+ }
+
+ $typeHex = sprintf('%02X', $type);
+ $class = 'callnotifier\EDSS1_Parameter_' . $typeHex;
+
+ return new $class($type);
+ }
}
?>