| Value | Meaning |
|---|---|
| IPIPPROTO_IP | Internet Protocol version 4 |
| ICMPIPPROTO_ICMP | Internet Control Message Protocol |
| IGMPIPPROTO_IGMP | Internet Group Management Protocol |
| GGPIPPROTO_GGP | Gateway to Gateway Protocol |
| TCPIPPROTO_TCP | Transmission Control Protocol |
| PUPIPPROTO_PUP | PARC Universal Packet Protocol |
| UDPIPPROTO_UDP | User Datagram Protocol |
| IDPIPPROTO_IDP | Xerox NS protocol |
| RAWIPPROTO_RAW | Raw IP packets |
| IPV6IPPROTO_IPV6 | Internet Protocol version 6 |
Protocol