MPLS_LABEL_FIRST_UNRESERVED
if (likely(dec.label >= MPLS_LABEL_FIRST_UNRESERVED)) {
if (index < MPLS_LABEL_FIRST_UNRESERVED)
index = MPLS_LABEL_FIRST_UNRESERVED;
if (rt && (index >= MPLS_LABEL_FIRST_UNRESERVED))
for (index = MPLS_LABEL_FIRST_UNRESERVED;
if (*index < MPLS_LABEL_FIRST_UNRESERVED) {