1 IPV6_ADDRFORM 2 MCAST_FILTER 3 IPV6_PKTOPTIONS 4 IPV6_MTU 5 IPV6_V6ONLY 6 IPV6_PKTINFO 7 IPV6_HOPLIMIT 8 IPV6_RTHDR 9 IPV6_HOPOPTS 10 IPV6_DSTOPTS 11 IPV6_FLOWINFO 12 IPV6_UNICAST_HOPS 13 IPV6_MULTICAST_HOPS 14 IPV6_MULTICAST_LOOP 15 IPV6_MULTICAST_IF 16 IPV6_MTU_DISCOVER 17 IPV6_RECVERR 18 IPV6_FLOWINFO_SEND 19 IPV6_ADD_MEMBERSHIP 20 IPV6_DROP_MEMBERSHIP 21 IPV6_ROUTER_ALERT 22
