mpls_prepend_shim
static struct mbuf *mpls_prepend_shim(struct mbuf *, union mpls_shim *);
((m = mpls_prepend_shim(m, &mh)) == NULL))
m = mpls_prepend_shim(m, &mh);
((m = mpls_prepend_shim(m, &tshim)) == NULL)) {
if ((m = mpls_prepend_shim(m, &tshim)) == NULL) {
if ((m = mpls_prepend_shim(m, ms)) == NULL)
if ((m = mpls_prepend_shim(m, ms)) == NULL)