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head/sys/net/if_bridge.c
| Show First 20 Lines • Show All 670 Lines • ▼ Show 20 Lines | |||||
| /* | /* | ||||
| * bridge_clone_create: | * bridge_clone_create: | ||||
| * | * | ||||
| * Create a new bridge instance. | * Create a new bridge instance. | ||||
| */ | */ | ||||
| static int | static int | ||||
| bridge_clone_create(struct if_clone *ifc, int unit, caddr_t params) | bridge_clone_create(struct if_clone *ifc, int unit, caddr_t params) | ||||
| { | { | ||||
| struct bridge_softc *sc, *sc2; | struct bridge_softc *sc; | ||||
| struct ifnet *bifp, *ifp; | struct ifnet *ifp; | ||||
| int fb, retry; | |||||
| unsigned long hostid; | |||||
| sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO); | sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO); | ||||
| ifp = sc->sc_ifp = if_alloc(IFT_ETHER); | ifp = sc->sc_ifp = if_alloc(IFT_ETHER); | ||||
| if (ifp == NULL) { | if (ifp == NULL) { | ||||
| free(sc, M_DEVBUF); | free(sc, M_DEVBUF); | ||||
| return (ENOSPC); | return (ENOSPC); | ||||
| } | } | ||||
| Show All 13 Lines | bridge_clone_create(struct if_clone *ifc, int unit, caddr_t params) | ||||
| if_initname(ifp, bridge_name, unit); | if_initname(ifp, bridge_name, unit); | ||||
| ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; | ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; | ||||
| ifp->if_ioctl = bridge_ioctl; | ifp->if_ioctl = bridge_ioctl; | ||||
| ifp->if_transmit = bridge_transmit; | ifp->if_transmit = bridge_transmit; | ||||
| ifp->if_qflush = bridge_qflush; | ifp->if_qflush = bridge_qflush; | ||||
| ifp->if_init = bridge_init; | ifp->if_init = bridge_init; | ||||
| ifp->if_type = IFT_BRIDGE; | ifp->if_type = IFT_BRIDGE; | ||||
| /* | |||||
| * Generate an ethernet address with a locally administered address. | |||||
| * | |||||
| * Since we are using random ethernet addresses for the bridge, it is | |||||
| * possible that we might have address collisions, so make sure that | |||||
| * this hardware address isn't already in use on another bridge. | |||||
| * The first try uses the hostid and falls back to arc4rand(). | |||||
| */ | |||||
| fb = 0; | |||||
| getcredhostid(curthread->td_ucred, &hostid); | |||||
| do { | |||||
| if (fb || hostid == 0) { | |||||
| ether_gen_addr(ifp, &sc->sc_defaddr); | ether_gen_addr(ifp, &sc->sc_defaddr); | ||||
| } else { | |||||
| sc->sc_defaddr.octet[0] = 0x2; | |||||
| sc->sc_defaddr.octet[1] = (hostid >> 24) & 0xff; | |||||
| sc->sc_defaddr.octet[2] = (hostid >> 16) & 0xff; | |||||
| sc->sc_defaddr.octet[3] = (hostid >> 8 ) & 0xff; | |||||
| sc->sc_defaddr.octet[4] = hostid & 0xff; | |||||
| sc->sc_defaddr.octet[5] = ifp->if_dunit & 0xff; | |||||
| } | |||||
| fb = 1; | |||||
| retry = 0; | |||||
| BRIDGE_LIST_LOCK(); | |||||
| LIST_FOREACH(sc2, &V_bridge_list, sc_list) { | |||||
| bifp = sc2->sc_ifp; | |||||
| if (memcmp(sc->sc_defaddr.octet, | |||||
| IF_LLADDR(bifp), ETHER_ADDR_LEN) == 0) { | |||||
| retry = 1; | |||||
| break; | |||||
| } | |||||
| } | |||||
| BRIDGE_LIST_UNLOCK(); | |||||
| } while (retry == 1); | |||||
| bstp_attach(&sc->sc_stp, &bridge_ops); | bstp_attach(&sc->sc_stp, &bridge_ops); | ||||
| ether_ifattach(ifp, sc->sc_defaddr.octet); | ether_ifattach(ifp, sc->sc_defaddr.octet); | ||||
| /* Now undo some of the damage... */ | /* Now undo some of the damage... */ | ||||
| ifp->if_baudrate = 0; | ifp->if_baudrate = 0; | ||||
| ifp->if_type = IFT_BRIDGE; | ifp->if_type = IFT_BRIDGE; | ||||
| BRIDGE_LIST_LOCK(); | BRIDGE_LIST_LOCK(); | ||||
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