NEXTADDR
NEXTADDR(RTA_DST, sin_m);
NEXTADDR(RTA_GATEWAY, sdl_m);
NEXTADDR(RTA_NETMASK, so_mask);
NEXTADDR(RTA_DST, so[RTAX_DST]);
NEXTADDR(RTA_GATEWAY, so[RTAX_GATEWAY]);
NEXTADDR(RTA_NETMASK, so[RTAX_NETMASK]);
NEXTADDR(RTA_GENMASK, so[RTAX_GENMASK]);
NEXTADDR(RTA_IFP, so[RTAX_IFP]);
NEXTADDR(RTA_IFA, so[RTAX_IFA]);
NEXTADDR(RTA_DST, dst);
NEXTADDR(RTA_GATEWAY, sdl);
NEXTADDR(RTA_DST, sin_m);
NEXTADDR(RTA_DST, sin_m);
NEXTADDR(RTA_GATEWAY, sdl_m);