if_findname
if ((iface = if_findname(r->dependon)))
struct iface *if_findname(char *);
idep = if_findname(r->dependon);
idep = if_findname(i->dependon);
if ((if_findname($3)) == NULL) {
if ((iface = if_findname($2)) == NULL) {
depend_if = if_findname($1);