fd_ip6
fr->fr_dif.fd_ip6 = $4.adr;
fr->fr_tif.fd_ip6 = $4.adr;
fr->fr_rif.fd_ip6 = $4.adr;
if (IP6_NOTZERO(&fdp->fd_ip6)) {
inet_ntop(AF_INET6, &fdp->fd_ip6, ipv6addr,
sizeof(fdp->fd_ip6));
str = inet_ntop(AF_INET6, &np->ipfd_dest.fd_ip6,
&np->ipfd_dest.fd_ip6, buf, sizeof(buf) - 1);
if (!bcmp(&node->ipfd_dest.fd_ip6, &frd.fd_ip6,
size - offsetof(frdest_t, fd_ip6))) {
#define fd_ip fd_ip6.in4