(eth src=00:11:22:33:44:55 type=0x86dd
 (ipv4 ttl=64 src=10.0.0.1 dst=10.0.0.2 ver=4 hlen=5 tos=0x02
  id=2 prot = 17 csum=0
  (udp (payload pattern=0 length=638))))