icmp6_data16
tp = (struct timeval *)&icmp6->icmp6_data16[2];
#define mld2r_res1 icmp6_data16[0]
#define mld2r_nummar icmp6_data16[1]
#define nd_ra_router_lifetime nd_ra_hdr.icmp6_data16[1]
#define icmp6_id icmp6_data16[0] /* echo request/reply */
#define icmp6_seq icmp6_data16[1] /* echo request/reply */
#define icmp6_maxdelay icmp6_data16[0] /* mcast group membership */
#define mld_maxdelay mld_icmp6_hdr.icmp6_data16[0]
#define mld_reserved mld_icmp6_hdr.icmp6_data16[1]
#define mld2q_mxrc mld2q_hdr.mld_icmp6_hdr.icmp6_data16[0]