# ip protocol tcp tcp dport 22
ip test-ip input
  [ payload load 1b @ network header + 9 => reg 1 ]
  [ cmp eq reg 1 0x00000006 ]
  [ payload load 2b @ transport header + 2 => reg 1 ]
  [ cmp eq reg 1 0x00001600 ]

# ip protocol tcp meta mark set 1 tcp dport 22
ip test-ip input
  [ payload load 1b @ network header + 9 => reg 1 ]
  [ cmp eq reg 1 0x00000006 ]
  [ immediate reg 1 0x00000001 ]
  [ meta set mark with reg 1 ]
  [ payload load 2b @ transport header + 2 => reg 1 ]
  [ cmp eq reg 1 0x00001600 ]