94 int		looutput(struct ifnet *ifp, struct mbuf *m,
110 lo_clone_destroy(struct ifnet *ifp)  in lo_clone_destroy()  argument
115 	KASSERT(V_loif != ifp, ("%s: destroying lo0", __func__));  in lo_clone_destroy()
118 	bpfdetach(ifp);  in lo_clone_destroy()
119 	if_detach(ifp);  in lo_clone_destroy()
120 	if_free(ifp);  in lo_clone_destroy()
126 	struct ifnet *ifp;  in lo_clone_create()  local
128 	ifp = if_alloc(IFT_LOOP);  in lo_clone_create()
129 	if (ifp == NULL)  in lo_clone_create()
132 	if_initname(ifp, loname, unit);  in lo_clone_create()
133 	ifp->if_mtu = LOMTU;  in lo_clone_create()
134 	ifp->if_flags = IFF_LOOPBACK | IFF_MULTICAST;  in lo_clone_create()
135 	ifp->if_ioctl = loioctl;  in lo_clone_create()
136 	ifp->if_output = looutput;  in lo_clone_create()
137 	ifp->if_snd.ifq_maxlen = ifqmaxlen;  in lo_clone_create()
138 	ifp->if_capabilities = ifp->if_capenable =  in lo_clone_create()
140 	ifp->if_hwassist = LO_CSUM_FEATURES | LO_CSUM_FEATURES6;  in lo_clone_create()
141 	if_attach(ifp);  in lo_clone_create()
142 	bpfattach(ifp, DLT_NULL, sizeof(u_int32_t));  in lo_clone_create()
144 		V_loif = ifp;  in lo_clone_create()
204 looutput(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,  in looutput()  argument
215 	error = mac_ifnet_check_transmit(ifp, m);  in looutput()
227 	if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);  in looutput()
228 	if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len);  in looutput()
243 		if (ifp->if_capenable & IFCAP_RXCSUM) {  in looutput()
256 		if (ifp->if_capenable & IFCAP_RXCSUM_IPV6) {  in looutput()
272 	return (if_simloop(ifp, m, af, 0));  in looutput()
286 if_simloop(struct ifnet *ifp, struct mbuf *m, int af, int hlen)  in if_simloop()  argument
292 	m->m_pkthdr.rcvif = ifp;  in if_simloop()
295 	mac_ifnet_create_mbuf(ifp, m);  in if_simloop()
309 		if (bpf_peers_present(ifp->if_bpf)) {  in if_simloop()
310 			bpf_mtap(ifp->if_bpf, m);  in if_simloop()
314 			if ((m->m_flags & M_MCAST) == 0 || V_loif == ifp) {  in if_simloop()
363 	if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);  in if_simloop()
364 	if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len);  in if_simloop()
374 loioctl(struct ifnet *ifp, u_long cmd, caddr_t data)  in loioctl()  argument
381 		ifp->if_flags |= IFF_UP;  in loioctl()
382 		ifp->if_drv_flags |= IFF_DRV_RUNNING;  in loioctl()
383 		if_link_state_change(ifp, LINK_STATE_UP);  in loioctl()
412 		ifp->if_mtu = ifr->ifr_mtu;  in loioctl()
416 		if_link_state_change(ifp, (ifp->if_flags & IFF_UP) ?  in loioctl()
421 		mask = ifp->if_capenable ^ ifr->ifr_reqcap;  in loioctl()
423 			ifp->if_capenable ^= IFCAP_RXCSUM;  in loioctl()
425 			ifp->if_capenable ^= IFCAP_TXCSUM;  in loioctl()
428 			ifp->if_capenable ^= IFCAP_RXCSUM_IPV6;  in loioctl()
436 			ifp->if_capenable ^= IFCAP_TXCSUM_IPV6;  in loioctl()
442 		ifp->if_hwassist = 0;  in loioctl()
443 		if (ifp->if_capenable & IFCAP_TXCSUM)  in loioctl()
444 			ifp->if_hwassist = LO_CSUM_FEATURES;  in loioctl()
446 		if (ifp->if_capenable & IFCAP_TXCSUM_IPV6)  in loioctl()
447 			ifp->if_hwassist |= LO_CSUM_FEATURES6;  in loioctl()