MAC
http://standards-oui.ieee.org/oui/oui.txt
EtherType
http://standards-oui.ieee.org/ethertype/eth.txt
https://www.iana.org/assignments/ieee-802-numbers/ieee-802-numbers.xhtml
https://www.cavebear.com/archive/cavebear/Ethernet/Ethernet.txt
IP protocol number
https://www.iana.org/assignments/protocol-numbers/protocol-numbers.xhtml
TCP/UDP port
https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml
IANA资源分配
https://www.iana.org/protocols
IANA资源申请规范说明
https://tools.ietf.org/html/rfc8126