land_schema = librar_schema:new( 1, ["eth", "ip", "eth", "ip"], scope());

#land_schema = [ 1, 1,     9, 6, 9, 6 ];

filter pptp ip ( )  {
        if ( ip.src == ip.dest ) 
          {
          record system.time, 
                 eth.src, ip.src, eth.dst, ip.dest
                 to land_recrdr ;
          } 
}

land_recrdr=recorder( "bin/histogram packages/test/land.cfg",
	"land_schema"  );