>Number:         11037
>Category:       kern
>Synopsis:       aue USB ether driver drops IPv6 router advertisement
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Sep 18 09:05:00 PDT 2000
>Closed-Date:
>Last-Modified:
>Originator:     Ryoji Kato
>Release:        1.5_ALPHA2 (20000918)
>Organization:
Nippon Ericsson K.K.
>Environment:
SONY VAIO
	machine: SONY VAIO PCG-C1
	os: NetBSD 1.5_ALPHA2
	target: MELCO USB 10/100M Ethernet LUA-TX
System: NetBSD vaio.foo.bar 1.5_ALPHA2 NetBSD 1.5_ALPHA2 (VAIO-PCGC1) #0: Mon Sep 18 22:11:08 GMT 2000 nrjryka@vaio.foo.bar:/export/work/aue/arch/i386/compile/VAIO-PCGC1 i386


>Description:
	LUA-TX (USB 10/100M Ethernet adapter, MELCO co.) drops IPv6 packets
	of router advertisement. Though the tcpdump on the router told that
	the router send RS to ff02::1 after receiving RA from LUA-TX, the
	interface of LUA-TX seems to ignore RA.

	My guess is that aue driver doesn't correctly configure the ether
	multicast addresses.
	
>How-To-Repeat:
	Assuming two hosts, IPv6 router and IPv6 node, which are connected
	with ethernet, rtadvd runs on the IPv6 router to advertise the
	network prefix, and the IPv6 node has LUA-TX.

	Run the following commands on the IPv6 node.

	# ifconfig aue0 inet6 up
	# sysctl -w net.inet6.ip6.accept_rtadv=1
	# rtsol aue0

	But the last "rtsol" add no IPv6 address to aue0.
>Fix:
	The following patch for sys/dev/usb/if_aue.c will solve this problem.


--- if_aue.c.orig	Mon Sep 18 21:36:28 2000
+++ if_aue.c	Mon Sep 18 23:44:56 2000
@@ -631,7 +631,7 @@
 		if (ifma->ifma_addr->sa_family != AF_LINK)
 			continue;
 		h = aue_crc(LLADDR((struct sockaddr_dl *)ifma->ifma_addr));
-		AUE_SETBIT(sc, AUE_MAR + (h >> 3), 1 << (h & 0xF));
+		AUE_SETBIT(sc, AUE_MAR + (h >> 3), 1 << (h & 0x7));
 	}
 #elif defined(__NetBSD__) || defined(__OpenBSD__)
 #if defined(__NetBSD__)
@@ -649,7 +649,7 @@
 		}
 #endif
 		h = aue_crc(enm->enm_addrlo);
-		AUE_SETBIT(sc, AUE_MAR + (h >> 3), 1 << (h & 0xF));
+		AUE_SETBIT(sc, AUE_MAR + (h >> 3), 1 << (h & 0x7));
 		ETHER_NEXT_MULTI(step, enm);
 	}
 #endif /* defined(__NetBSD__) || defined(__OpenBSD__) */
@@ -1719,6 +1719,14 @@
 		break;
 	case SIOCADDMULTI:
 	case SIOCDELMULTI:
+#if defined(__NetBSD__) || defined(__OpenBSD__)
+		error = (command == SIOCADDMULTI) ?
+			ether_addmulti(ifr, &sc->aue_ec) :
+			ether_delmulti(ifr, &sc->aue_ec);
+		if (error == ENETRESET) {
+			aue_init(sc);
+		}
+#endif /* defined(__NetBSD__) || defined(__OpenBSD__) */
 		aue_setmulti(sc);
 		error = 0;
 		break;
>Release-Note:
>Audit-Trail:
>Unformatted: