IPV6_FLOWLABEL_MASK
u_int32_t flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK;
flowlabel = ip6->ip6_flow & IPV6_FLOWLABEL_MASK;
flowlabel = ip6->ip6_flow & IPV6_FLOWLABEL_MASK;
ip6->ip6_flow &= ~IPV6_FLOWLABEL_MASK;
(htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
(htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
(eip6->ip6_flow & IPV6_FLOWLABEL_MASK);
in6p_flowinfo(inp) &= ~IPV6_FLOWLABEL_MASK;
(htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
in6p_flowinfo(inp) &= ~IPV6_FLOWLABEL_MASK;
flowinfo == (in6p_flowinfo(inp) & IPV6_FLOWLABEL_MASK) &&