diff options
| author | Damien Bergamini <damien@cvs.openbsd.org> | 2009-11-17 18:21:08 +0000 |
|---|---|---|
| committer | Damien Bergamini <damien@cvs.openbsd.org> | 2009-11-17 18:21:08 +0000 |
| commit | 8b20e7a0245134af011ffa5cd29595c510c3418c (patch) | |
| tree | 26492c863d3a88380bf9c474aafcb7e804ba4eb9 /sys/dev/ic/athn.c | |
| parent | c24e705074d2e173dff02bf2e0c359962e59813b (diff) | |
update hardware multicast filter.
Diffstat (limited to 'sys/dev/ic/athn.c')
| -rw-r--r-- | sys/dev/ic/athn.c | 50 |
1 files changed, 48 insertions, 2 deletions
diff --git a/sys/dev/ic/athn.c b/sys/dev/ic/athn.c index 9276cadc570..f5724687526 100644 --- a/sys/dev/ic/athn.c +++ b/sys/dev/ic/athn.c @@ -1,4 +1,4 @@ -/* $OpenBSD: athn.c,v 1.6 2009/11/17 18:01:40 damien Exp $ */ +/* $OpenBSD: athn.c,v 1.7 2009/11/17 18:21:07 damien Exp $ */ /*- * Copyright (c) 2009 Damien Bergamini <damien.bergamini@free.fr> @@ -160,6 +160,7 @@ void athn_updateedca(struct ieee80211com *); void athn_updateslot(struct ieee80211com *); void athn_start(struct ifnet *); void athn_watchdog(struct ifnet *); +void athn_set_multi(struct athn_softc *); int athn_ioctl(struct ifnet *, u_long, caddr_t); int athn_init(struct ifnet *); void athn_stop(struct ifnet *, int); @@ -4484,6 +4485,46 @@ athn_watchdog(struct ifnet *ifp) ieee80211_watchdog(ifp); } +void +athn_set_multi(struct athn_softc *sc) +{ + struct arpcom *ac = &sc->sc_ic.ic_ac; + struct ifnet *ifp = &ac->ac_if; + struct ether_multi *enm; + struct ether_multistep step; + const uint8_t *addr; + uint32_t val, lo, hi; + uint8_t bit; + + if ((ifp->if_flags & (IFF_ALLMULTI | IFF_PROMISC)) != 0) { + lo = hi = 0xffffffff; + goto done; + } + lo = hi = 0; + ETHER_FIRST_MULTI(step, ac, enm); + while (enm != NULL) { + if (memcmp(enm->enm_addrlo, enm->enm_addrhi, 6) != 0) { + ifp->if_flags |= IFF_ALLMULTI; + lo = hi = 0xffffffff; + goto done; + } + addr = enm->enm_addrlo; + /* Calculate the XOR value of all eight 6-bit words. */ + val = addr[0] | addr[1] << 8 | addr[2] << 16; + bit = (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ (val & 0x3f); + val = addr[3] | addr[4] << 8 | addr[5] << 16; + bit ^= (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ (val & 0x3f); + if (bit < 32) + lo |= 1 << bit; + else + hi |= 1 << (bit - 32); + ETHER_NEXT_MULTI(step, enm); + } + done: + AR_WRITE(sc, AR_MCAST_FIL0, lo); + AR_WRITE(sc, AR_MCAST_FIL1, hi); +} + int athn_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) { @@ -4506,12 +4547,17 @@ athn_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) /* FALLTHROUGH */ case SIOCSIFFLAGS: if (ifp->if_flags & IFF_UP) { - if (!(ifp->if_flags & IFF_RUNNING)) + if ((ifp->if_flags & IFF_RUNNING) && + ((ifp->if_flags ^ sc->sc_if_flags) & + (IFF_ALLMULTI | IFF_PROMISC)) != 0) { + athn_set_multi(sc); + } else if (!(ifp->if_flags & IFF_RUNNING)) error = athn_init(ifp); } else { if (ifp->if_flags & IFF_RUNNING) athn_stop(ifp, 1); } + sc->sc_if_flags = ifp->if_flags; break; case SIOCADDMULTI: |