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While flushing the multicast filter of an interface, do not zero the relevant

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ifmultiaddr structures' reference to the parent interface, unless the parent
interface is really detaching. While here, program only link layer multicast
filters to a wlan's hardware parent interface.

PR:		kern/142391, kern/142392
Reviewed by:	sam, rpaolo, bms
MFC after:	1 week
This commit is contained in:
Shteryana Shopova 2010-01-24 16:17:58 +00:00
parent 780b61c45b
commit 93ec7edca7
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=202935
3 changed files with 25 additions and 5 deletions
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21
sys/net/if.c
View File

@ -740,9 +740,10 @@ if_purgeaddrs(struct ifnet *ifp)
}
/*
* Remove any multicast network addresses from an interface.
* Remove any multicast network addresses from an interface when an ifnet
* is going away.
*/
void
static void
if_purgemaddrs(struct ifnet *ifp)
{
struct ifmultiaddr *ifma;
@ -2939,6 +2940,22 @@ if_delmulti(struct ifnet *ifp, struct sockaddr *sa)
return (0);
}
/*
* Delete all multicast group membership for an interface.
* Should be used to quickly flush all multicast filters.
*/
void
if_delallmulti(struct ifnet *ifp)
{
struct ifmultiaddr *ifma;
struct ifmultiaddr *next;
IF_ADDR_LOCK(ifp);
TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next)
if_delmulti_locked(ifp, ifma, 0);
IF_ADDR_UNLOCK(ifp);
}
/*
* Delete a multicast group membership by group membership pointer.
* Network-layer protocol domains must use this routine.

2
sys/net/if_var.h
View File

@ -833,7 +833,7 @@ void if_delmulti_ifma(struct ifmultiaddr *);
void if_detach(struct ifnet *);
void if_vmove(struct ifnet *, struct vnet *);
void if_purgeaddrs(struct ifnet *);
void if_purgemaddrs(struct ifnet *);
void if_delallmulti(struct ifnet *);
void if_down(struct ifnet *);
struct ifmultiaddr *
if_findmulti(struct ifnet *, struct sockaddr *);

7
sys/net80211/ieee80211_ioctl.c
View File

@ -3199,15 +3199,18 @@ ieee80211_ioctl_updatemulti(struct ieee80211com *ic)
void *ioctl;
IEEE80211_LOCK(ic);
if_purgemaddrs(parent);
if_delallmulti(parent);
ioctl = parent->if_ioctl; /* XXX WAR if_allmulti */
parent->if_ioctl = NULL;
TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
struct ifnet *ifp = vap->iv_ifp;
struct ifmultiaddr *ifma;
TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
if (ifma->ifma_addr->sa_family != AF_LINK)
continue;
(void) if_addmulti(parent, ifma->ifma_addr, NULL);
}
}
parent->if_ioctl = ioctl;
ieee80211_runtask(ic, &ic->ic_mcast_task);