IPPROTO_ETHERIP
proto = IPPROTO_ETHERIP;
case IPPROTO_ETHERIP:
.proto = IPPROTO_ETHERIP,
IPPROTO_REGISTER(IPPROTO_ETHERIP, encap4_input, NULL);
.proto = IPPROTO_ETHERIP,
IP6PROTO_REGISTER(IPPROTO_ETHERIP, encap6_input, NULL);
case IPPROTO_ETHERIP:
case IPPROTO_ETHERIP:
case IPPROTO_ETHERIP: /* RFC 3378 */