contrib/examples/bpfc/ipv4_tcp_ssh.bpf

   1 ldh [12]
   2 jeq #0x800, Cont1, Drop
   3 Cont1: ldb [23]
   4 jeq #0x6, Cont2, Drop
   5 Cont2: ldh [20]
   6 jset #0x1fff, Drop, Cont3
   7 Cont3: ldxb 4 * ([14] & 0xf)
   8 ldh [x + 14]
   9 jeq #0x16, Keep, Cont4
  10 Cont4: ldh [x + 16]
  11 jeq #0x16, Keep, Drop
  12 Keep: ret #0xffffffff
  13 Drop: ret #0