Problem is with third argument in this function ( for example $n). If you write script like this:

<?

 // ... socket definisions ...
 $ret = read($cur_sock, &$buf, 1);

?>

 ... then it recive one string but must be sent 2 characters from client( I try it with telnet ). Then I look with my friend in source code and there is a bug because when it reads for frist time m = 0, so it doesn't increment n. Thats why it reads one more character. Hope it was helpfull.

 That's all folks, Milan Mlynarcik