RTAX_MPLS1
struct sockaddr *shim = rt_shim[RTAX_MPLS1 + i];
rtinfo->rti_info[RTAX_MPLS1] = rt->rt_shim[0];
if (rtinfo->rti_info[RTAX_MPLS1] != NULL)
#define rti_mpls1 rti_info[RTAX_MPLS1]