IPV6_FLOWINFO_TCLASS
class = ntohl((ip6h->ip6_vcf & IPV6_FLOWINFO_TCLASS)) >> 20;
class = iph->ip6_vcf & IPV6_FLOWINFO_TCLASS;
ntohl((sin6->sin6_flowinfo & IPV6_FLOWINFO_TCLASS) >> 20),
#define IPV6_FLOW_TCLASS(x) (((x) & IPV6_FLOWINFO_TCLASS) >> 20)
#define IPV6_TCLASS_FLOW(f, c) (((f) & ~IPV6_FLOWINFO_TCLASS) |\
#define IPV6_TCLASS_FLOW(f, c) (((f) & ~IPV6_FLOWINFO_TCLASS) |\