3 files changed, 11 insertions(+), 2 deletions(-)

M pc/devether.c
M port/netif.c
M port/netif.h

@@ 114,7 114,8 @@ etherwloop(Ether *ctlr, Etherpkt *pkt, long len)
 	int s, different;
 
 	different = memcmp(pkt->d, pkt->s, sizeof(pkt->s));
-	if(different && memcmp(pkt->d, ctlr->bcast, sizeof(pkt->d)))
+	if(different && memcmp(pkt->d, ctlr->bcast, sizeof(pkt->d))
+	&& ctlr->prom==0 && ctlr->all==0)
 		return 0;
 
 	s = splhi();

@@ 213,6 213,8 @@ netifwrite(Netif *nif, Chan *c, void *a, long n)
 	f = nif->f[NETID(c->qid.path)];
 	if(p = matchtoken(buf, "connect")){
 		f->type = atoi(p);
+		if(f->type < 0)
+			nif->all++;
 	} else if(matchtoken(buf, "promiscuous")){
 		f->prom = 1;
 		nif->prom++;


@@ 266,6 268,11 @@ netifclose(Netif *nif, Chan *c)
 				(*nif->promiscuous)(nif->arg, 0);
 			qunlock(nif);
 		}
+		if(f->type < 0){
+			qlock(nif);
+			--(nif->all);
+			qunlock(nif);
+		}
 		f->owner[0] = 0;
 		f->type = 0;
 		qclose(f->in);

@@ 57,7 57,8 @@ struct Netif
 	int	alen;			/* address length */
 	uchar	addr[Nmaxaddr];
 	uchar	bcast[Nmaxaddr];
-	int	prom;
+	int	prom;			/* number of promiscuous opens */
+	int	all;			/* number of -1 multiplexors */
 
 	/* statistics */
 	int	misses;