92 static int	looutput(struct ifnet *ifp, struct mbuf *m,
102 lo_clone_destroy(struct if_clone *ifc, struct ifnet *ifp, uint32_t flags)  in lo_clone_destroy()  argument
104 	if (ifp->if_dunit == 0 && (flags & IFC_F_FORCE) == 0)  in lo_clone_destroy()
109 	KASSERT(V_loif != ifp, ("%s: destroying lo0", __func__));  in lo_clone_destroy()
112 	bpfdetach(ifp);  in lo_clone_destroy()
113 	if_detach(ifp);  in lo_clone_destroy()
114 	if_free(ifp);  in lo_clone_destroy()
123 	struct ifnet *ifp;  in lo_clone_create()  local
125 	ifp = if_alloc(IFT_LOOP);  in lo_clone_create()
126 	if_initname(ifp, loname, ifd->unit);  in lo_clone_create()
127 	ifp->if_mtu = LOMTU;  in lo_clone_create()
128 	ifp->if_flags = IFF_LOOPBACK | IFF_MULTICAST;  in lo_clone_create()
129 	ifp->if_ioctl = loioctl;  in lo_clone_create()
130 	ifp->if_output = looutput;  in lo_clone_create()
131 	ifp->if_snd.ifq_maxlen = ifqmaxlen;  in lo_clone_create()
132 	ifp->if_capabilities = ifp->if_capenable =  in lo_clone_create()
134 	ifp->if_hwassist = LO_CSUM_FEATURES | LO_CSUM_FEATURES6;  in lo_clone_create()
135 	if_attach(ifp);  in lo_clone_create()
136 	bpfattach(ifp, DLT_NULL, sizeof(u_int32_t));  in lo_clone_create()
137 	*ifpp = ifp;  in lo_clone_create()
196 looutput(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,  in looutput()  argument
207 	error = mac_ifnet_check_transmit(ifp, m);  in looutput()
219 	if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);  in looutput()
220 	if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len);  in looutput()
235 		if (ifp->if_capenable & IFCAP_RXCSUM) {  in looutput()
248 		if (ifp->if_capenable & IFCAP_RXCSUM_IPV6) {  in looutput()
264 	return (if_simloop(ifp, m, af, 0));  in looutput()
278 if_simloop(struct ifnet *ifp, struct mbuf *m, int af, int hlen)  in if_simloop()  argument
284 	m->m_pkthdr.rcvif = ifp;  in if_simloop()
287 	mac_ifnet_create_mbuf(ifp, m);  in if_simloop()
301 		if (bpf_peers_present(ifp->if_bpf)) {  in if_simloop()
302 			bpf_mtap(ifp->if_bpf, m);  in if_simloop()
306 			if ((m->m_flags & M_MCAST) == 0 || V_loif == ifp) {  in if_simloop()
355 	if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);  in if_simloop()
356 	if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len);  in if_simloop()
365 loioctl(struct ifnet *ifp, u_long cmd, caddr_t data)  in loioctl()  argument
372 		ifp->if_flags |= IFF_UP;  in loioctl()
373 		ifp->if_drv_flags |= IFF_DRV_RUNNING;  in loioctl()
374 		if_link_state_change(ifp, LINK_STATE_UP);  in loioctl()
403 		ifp->if_mtu = ifr->ifr_mtu;  in loioctl()
407 		if_link_state_change(ifp, (ifp->if_flags & IFF_UP) ?  in loioctl()
412 		mask = ifp->if_capenable ^ ifr->ifr_reqcap;  in loioctl()
414 			ifp->if_capenable ^= IFCAP_RXCSUM;  in loioctl()
416 			ifp->if_capenable ^= IFCAP_TXCSUM;  in loioctl()
419 			ifp->if_capenable ^= IFCAP_RXCSUM_IPV6;  in loioctl()
427 			ifp->if_capenable ^= IFCAP_TXCSUM_IPV6;  in loioctl()
433 		ifp->if_hwassist = 0;  in loioctl()
434 		if (ifp->if_capenable & IFCAP_TXCSUM)  in loioctl()
435 			ifp->if_hwassist = LO_CSUM_FEATURES;  in loioctl()
437 		if (ifp->if_capenable & IFCAP_TXCSUM_IPV6)  in loioctl()
438 			ifp->if_hwassist |= LO_CSUM_FEATURES6;  in loioctl()