Help How to send packet to Vanganth C6 cacheD

[Zugzug]

Hi All!

Hoping someone with more experience than me can help out

 

Using vanganth's C6 pack I am trying to change a characters location using the "SetCharacterLocationPacket" packet and sending it to the cacheD server with PHP script. I'm stuck trying to figure out how to properly build the packet/checksum. I did find some helpful posts with samples and I verified that the packet format matches my servers but I'm stuck with this checksum error and having a hard time figuring it out.

 

Error:
 

error. Packet checksum is different. protocol[2], len[31], check[-2]

 

Using the following code to send the packet:

 

# #2 SetCharacterLocationPacket("dddddS")

$cached_op = pack ( "cVVVVV", 2, $char_id, 1, $x, $y, $z );
$cached_op .= ansi2unicode($account);
$ret_string = l2_cached_push(pack("s", strlen($cached_op) + 2) . $cached_op);

function l2_cached_push ( $cached_packet ) {
  $cached_fptr = l2_cached_open();
  if ( !is_resource($cached_fptr) ) {
    return ( "Error connecting to cached: " . $cached_fptr . " [server down??]" );
  }
  fwrite($cached_fptr, $cached_packet);
  $response = fread ($cached_fptr, 2);
  $array_ret_length = unpack("v", $response);
  $ret_id = unpack("c", fread ( $cached_fptr, 1 ) );
  $ret_string = "";
  for ( $i = 0; $i < ( ( $array_ret_length [ 1 ] - 4 ) / 4 ); $i++ ) {
    $array_read = unpack ( "i", fread ( $cached_fptr, 4 ) );
    $ret_string .= $array_read [ 1 ];
  }
  return ( $ret_string );
}

function ansi2unicode($ansi_str) {
  return (iconv('CP1252', 'UCS-2LE', $ansi_str).chr(0).chr(0));
}

 

Thanks for taking a look! Hopefully someone has the answer and this post can help others too.

 

Edited November 20, 2021 by Zugzug
grammar