#define ip6_hlim ip6_ctlun.ip6_un1.ip6_un1_hlim
#define ip6_hops ip6_ctlun.ip6_un1.ip6_un1_hlim
+struct ip6_rthdr {
+ uint8_t ip6r_nxt;
+ uint8_t ip6r_len;
+ uint8_t ip6r_type;
+ uint8_t ip6r_segleft;
+};
+
struct ip6_ext {
uint8_t ip6e_nxt;
uint8_t ip6e_len;