in6p_flowinfo
(inp->in6p_flowinfo & IPV6_FLOWINFO_MASK);
inp->in6p_flowinfo = sin6->sin6_flowinfo;
inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
inp->in6p_flowinfo |=
inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
flowinfo == (inp->in6p_flowinfo & IPV6_FLOWLABEL_MASK) &&
(in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK);
ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK;