- * (*ifp->if_output)(ifp, m, pf)
- * Here m is the mbuf chain to be sent and pf is the protocol family
- * of the internetwork datagram format in which the data is wrapped
- * (e.g. PF_PUP or PF_INET). The output routine encapsulates the
- * supplied datagram if necessary, and then transmits it on its medium.
+ * (*ifp->if_output)(ifp, m, dst)
+ * Here m is the mbuf chain to be sent and dst is the destination address.
+ * The output routine encapsulates the supplied datagram if necessary,
+ * and then transmits it on its medium.