IPV6_DONTFRAG
#if defined(IPV6_DONTFRAG)
if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_DONTFRAG,
X(IPV6_DONTFRAG) X(IPV6_PREFER_TEMPADDR) XEND
if (setsockopt(ssend, IPPROTO_IPV6, IPV6_DONTFRAG,
return (IPV6_DONTFRAG);
case IPV6_DONTFRAG:
case IPV6_DONTFRAG:
case IPV6_DONTFRAG:
case IPV6_DONTFRAG:
case IPV6_DONTFRAG: