Revert "kernel: disable multicast-to-unicast translation for ipv6 neighbor solicitation (#17625)"

This reverts commit a080e8e1943156168913d0353a2e99d1151102aa. It did not fix the problem but just hid some symptom. The real issue was that IGMP/MLD report suppression was not considered for the multicast-to-unicast feature. A recent netifd which isolates IGMP/MLD reports between STAs by utilizing AP-isolation and bridge-hairpinning should have fixed this. It is perfectly fine to apply multicast-to-unicast to IPv6 Neighbor Solicitations, too (once that feature is configured correctly). Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue> Signed-off-by: Felix Fietkau <nbd@openwrt.org> SVN-Revision: 46720
9 years ago · ea9963bb21
parent d4e9c8d7ef
commit ea9963bb21
2 changed files with 34 additions and 40 deletions
--- a/target/linux/generic/patches-3.18/645-bridge_multicast_to_unicast.patch
+++ b/target/linux/generic/patches-3.18/645-bridge_multicast_to_unicast.patch
@ -87,19 +87,16 @@
 {
 	struct br_ip br_group;
 
-@@ -736,7 +758,10 @@ static int br_ip6_multicast_add_group(st
+@@ -736,7 +758,7 @@ static int br_ip6_multicast_add_group(st
 	br_group.proto = htons(ETH_P_IPV6);
 	br_group.vid = vid;
 
 -	return br_multicast_add_group(br, port, &br_group);
-+	if (ipv6_addr_is_solict_mult(group))
-+		src = NULL;
-+
 +	return br_multicast_add_group(br, port, &br_group, src);
 }
 #endif
 
-@@ -965,6 +990,7 @@ static int br_ip4_multicast_igmp3_report
+@@ -965,6 +987,7 @@ static int br_ip4_multicast_igmp3_report
 					 struct sk_buff *skb,
 					 u16 vid)
 {
@ -107,7 +104,7 @@
 	struct igmpv3_report *ih;
 	struct igmpv3_grec *grec;
 	int i;
-@@ -1008,7 +1034,7 @@ static int br_ip4_multicast_igmp3_report
+@@ -1008,7 +1031,7 @@ static int br_ip4_multicast_igmp3_report
 			continue;
 		}
 
@ -116,7 +113,7 @@
 		if (err)
 			break;
 	}
-@@ -1022,6 +1048,7 @@ static int br_ip6_multicast_mld2_report(
+@@ -1022,6 +1045,7 @@ static int br_ip6_multicast_mld2_report(
 					struct sk_buff *skb,
 					u16 vid)
 {
@ -124,7 +121,7 @@
 	struct icmp6hdr *icmp6h;
 	struct mld2_grec *grec;
 	int i;
-@@ -1070,7 +1097,7 @@ static int br_ip6_multicast_mld2_report(
+@@ -1070,7 +1094,7 @@ static int br_ip6_multicast_mld2_report(
 		}
 
 		err = br_ip6_multicast_add_group(br, port, &grec->grec_mca,
@ -133,7 +130,7 @@
 		if (err)
 			break;
 	}
-@@ -1406,7 +1433,8 @@ br_multicast_leave_group(struct net_brid
+@@ -1407,7 +1431,8 @@ br_multicast_leave_group(struct net_brid
 			 struct net_bridge_port *port,
 			 struct br_ip *group,
 			 struct bridge_mcast_other_query *other_query,
@ -143,7 +140,7 @@
 {
 	struct net_bridge_mdb_htable *mdb;
 	struct net_bridge_mdb_entry *mp;
-@@ -1456,7 +1484,7 @@ br_multicast_leave_group(struct net_brid
+@@ -1457,7 +1482,7 @@ br_multicast_leave_group(struct net_brid
 		for (pp = &mp->ports;
 		     (p = mlock_dereference(*pp, br)) != NULL;
 		     pp = &p->next) {
@ -152,7 +149,7 @@
 				continue;
 
 			rcu_assign_pointer(*pp, p->next);
-@@ -1490,7 +1518,7 @@ br_multicast_leave_group(struct net_brid
+@@ -1491,7 +1516,7 @@ br_multicast_leave_group(struct net_brid
 	for (p = mlock_dereference(mp->ports, br);
 	     p != NULL;
 	     p = mlock_dereference(p->next, br)) {
@ -161,7 +158,7 @@
 			continue;
 
 		if (!hlist_unhashed(&p->mglist) &&
-@@ -1508,8 +1536,8 @@ out:
+@@ -1509,8 +1534,8 @@ out:
 
 static void br_ip4_multicast_leave_group(struct net_bridge *br,
 					 struct net_bridge_port *port,
@ -172,7 +169,7 @@
 {
 	struct br_ip br_group;
 	struct bridge_mcast_own_query *own_query;
-@@ -1524,14 +1552,14 @@ static void br_ip4_multicast_leave_group
+@@ -1525,14 +1550,14 @@ static void br_ip4_multicast_leave_group
 	br_group.vid = vid;
 
 	br_multicast_leave_group(br, port, &br_group, &br->ip4_other_query,
@ -189,7 +186,7 @@
 {
 	struct br_ip br_group;
 	struct bridge_mcast_own_query *own_query;
-@@ -1546,7 +1574,7 @@ static void br_ip6_multicast_leave_group
+@@ -1547,7 +1572,7 @@ static void br_ip6_multicast_leave_group
 	br_group.vid = vid;
 
 	br_multicast_leave_group(br, port, &br_group, &br->ip6_other_query,
@ -198,7 +195,7 @@
 }
 #endif
 
-@@ -1555,6 +1583,7 @@ static int br_multicast_ipv4_rcv(struct
+@@ -1556,6 +1581,7 @@ static int br_multicast_ipv4_rcv(struct
 				 struct sk_buff *skb,
 				 u16 vid)
 {
@ -206,7 +203,7 @@
 	struct sk_buff *skb2 = skb;
 	const struct iphdr *iph;
 	struct igmphdr *ih;
-@@ -1628,7 +1657,7 @@ static int br_multicast_ipv4_rcv(struct
+@@ -1629,7 +1655,7 @@ static int br_multicast_ipv4_rcv(struct
 	case IGMP_HOST_MEMBERSHIP_REPORT:
 	case IGMPV2_HOST_MEMBERSHIP_REPORT:
 		BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
@ -215,7 +212,7 @@
 		break;
 	case IGMPV3_HOST_MEMBERSHIP_REPORT:
 		err = br_ip4_multicast_igmp3_report(br, port, skb2, vid);
-@@ -1637,7 +1666,7 @@ static int br_multicast_ipv4_rcv(struct
+@@ -1638,7 +1664,7 @@ static int br_multicast_ipv4_rcv(struct
 		err = br_ip4_multicast_query(br, port, skb2, vid);
 		break;
 	case IGMP_HOST_LEAVE_MESSAGE:
@ -224,7 +221,7 @@
 		break;
 	}
 
-@@ -1655,6 +1684,7 @@ static int br_multicast_ipv6_rcv(struct
+@@ -1656,6 +1682,7 @@ static int br_multicast_ipv6_rcv(struct
 				 struct sk_buff *skb,
 				 u16 vid)
 {
@ -232,7 +229,7 @@
 	struct sk_buff *skb2;
 	const struct ipv6hdr *ip6h;
 	u8 icmp6_type;
-@@ -1764,7 +1794,8 @@ static int br_multicast_ipv6_rcv(struct
+@@ -1765,7 +1792,8 @@ static int br_multicast_ipv6_rcv(struct
 		}
 		mld = (struct mld_msg *)skb_transport_header(skb2);
 		BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
@ -242,7 +239,7 @@
 		break;
 	    }
 	case ICMPV6_MLD2_REPORT:
-@@ -1781,7 +1812,7 @@ static int br_multicast_ipv6_rcv(struct
+@@ -1782,7 +1810,7 @@ static int br_multicast_ipv6_rcv(struct
 			goto out;
 		}
 		mld = (struct mld_msg *)skb_transport_header(skb2);
--- a/target/linux/generic/patches-4.1/645-bridge_multicast_to_unicast.patch
+++ b/target/linux/generic/patches-4.1/645-bridge_multicast_to_unicast.patch
@ -97,19 +97,16 @@
 {
 	struct br_ip br_group;
 
-@@ -736,7 +758,10 @@ static int br_ip6_multicast_add_group(st
+@@ -736,7 +758,7 @@ static int br_ip6_multicast_add_group(st
 	br_group.proto = htons(ETH_P_IPV6);
 	br_group.vid = vid;
 
 -	return br_multicast_add_group(br, port, &br_group);
-+	if (ipv6_addr_is_solict_mult(group))
-+		src = NULL;
-+
 +	return br_multicast_add_group(br, port, &br_group, src);
 }
 #endif
 
-@@ -966,6 +991,7 @@ static int br_ip4_multicast_igmp3_report
+@@ -966,6 +988,7 @@ static int br_ip4_multicast_igmp3_report
 					 struct sk_buff *skb,
 					 u16 vid)
 {
@ -117,7 +114,7 @@
 	struct igmpv3_report *ih;
 	struct igmpv3_grec *grec;
 	int i;
-@@ -1009,7 +1035,7 @@ static int br_ip4_multicast_igmp3_report
+@@ -1009,7 +1032,7 @@ static int br_ip4_multicast_igmp3_report
 			continue;
 		}
 
@ -126,7 +123,7 @@
 		if (err)
 			break;
 	}
-@@ -1023,6 +1049,7 @@ static int br_ip6_multicast_mld2_report(
+@@ -1023,6 +1046,7 @@ static int br_ip6_multicast_mld2_report(
 					struct sk_buff *skb,
 					u16 vid)
 {
@ -134,7 +131,7 @@
 	struct icmp6hdr *icmp6h;
 	struct mld2_grec *grec;
 	int i;
-@@ -1071,7 +1098,7 @@ static int br_ip6_multicast_mld2_report(
+@@ -1071,7 +1095,7 @@ static int br_ip6_multicast_mld2_report(
 		}
 
 		err = br_ip6_multicast_add_group(br, port, &grec->grec_mca,
@ -143,7 +140,7 @@
 		if (err)
 			break;
 	}
-@@ -1407,7 +1434,8 @@ br_multicast_leave_group(struct net_brid
+@@ -1407,7 +1431,8 @@ br_multicast_leave_group(struct net_brid
 			 struct net_bridge_port *port,
 			 struct br_ip *group,
 			 struct bridge_mcast_other_query *other_query,
@ -153,7 +150,7 @@
 {
 	struct net_bridge_mdb_htable *mdb;
 	struct net_bridge_mdb_entry *mp;
-@@ -1457,7 +1485,7 @@ br_multicast_leave_group(struct net_brid
+@@ -1457,7 +1482,7 @@ br_multicast_leave_group(struct net_brid
 		for (pp = &mp->ports;
 		     (p = mlock_dereference(*pp, br)) != NULL;
 		     pp = &p->next) {
@ -162,7 +159,7 @@
 				continue;
 
 			rcu_assign_pointer(*pp, p->next);
-@@ -1491,7 +1519,7 @@ br_multicast_leave_group(struct net_brid
+@@ -1491,7 +1516,7 @@ br_multicast_leave_group(struct net_brid
 	for (p = mlock_dereference(mp->ports, br);
 	     p != NULL;
 	     p = mlock_dereference(p->next, br)) {
@ -171,7 +168,7 @@
 			continue;
 
 		if (!hlist_unhashed(&p->mglist) &&
-@@ -1509,8 +1537,8 @@ out:
+@@ -1509,8 +1534,8 @@ out:
 
 static void br_ip4_multicast_leave_group(struct net_bridge *br,
 					 struct net_bridge_port *port,
@ -182,7 +179,7 @@
 {
 	struct br_ip br_group;
 	struct bridge_mcast_own_query *own_query;
-@@ -1525,14 +1553,14 @@ static void br_ip4_multicast_leave_group
+@@ -1525,14 +1550,14 @@ static void br_ip4_multicast_leave_group
 	br_group.vid = vid;
 
 	br_multicast_leave_group(br, port, &br_group, &br->ip4_other_query,
@ -199,7 +196,7 @@
 {
 	struct br_ip br_group;
 	struct bridge_mcast_own_query *own_query;
-@@ -1547,7 +1575,7 @@ static void br_ip6_multicast_leave_group
+@@ -1547,7 +1572,7 @@ static void br_ip6_multicast_leave_group
 	br_group.vid = vid;
 
 	br_multicast_leave_group(br, port, &br_group, &br->ip6_other_query,
@ -208,7 +205,7 @@
 }
 #endif
 
-@@ -1556,6 +1584,7 @@ static int br_multicast_ipv4_rcv(struct
+@@ -1556,6 +1581,7 @@ static int br_multicast_ipv4_rcv(struct
 				 struct sk_buff *skb,
 				 u16 vid)
 {
@ -216,7 +213,7 @@
 	struct sk_buff *skb2 = skb;
 	const struct iphdr *iph;
 	struct igmphdr *ih;
-@@ -1629,7 +1658,7 @@ static int br_multicast_ipv4_rcv(struct
+@@ -1629,7 +1655,7 @@ static int br_multicast_ipv4_rcv(struct
 	case IGMP_HOST_MEMBERSHIP_REPORT:
 	case IGMPV2_HOST_MEMBERSHIP_REPORT:
 		BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
@ -225,7 +222,7 @@
 		break;
 	case IGMPV3_HOST_MEMBERSHIP_REPORT:
 		err = br_ip4_multicast_igmp3_report(br, port, skb2, vid);
-@@ -1638,7 +1667,7 @@ static int br_multicast_ipv4_rcv(struct
+@@ -1638,7 +1664,7 @@ static int br_multicast_ipv4_rcv(struct
 		err = br_ip4_multicast_query(br, port, skb2, vid);
 		break;
 	case IGMP_HOST_LEAVE_MESSAGE:
@ -234,7 +231,7 @@
 		break;
 	}
 
-@@ -1656,6 +1685,7 @@ static int br_multicast_ipv6_rcv(struct
+@@ -1656,6 +1682,7 @@ static int br_multicast_ipv6_rcv(struct
 				 struct sk_buff *skb,
 				 u16 vid)
 {
@ -242,7 +239,7 @@
 	struct sk_buff *skb2;
 	const struct ipv6hdr *ip6h;
 	u8 icmp6_type;
-@@ -1765,7 +1795,8 @@ static int br_multicast_ipv6_rcv(struct
+@@ -1765,7 +1792,8 @@ static int br_multicast_ipv6_rcv(struct
 		}
 		mld = (struct mld_msg *)skb_transport_header(skb2);
 		BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
@ -252,7 +249,7 @@
 		break;
 	    }
 	case ICMPV6_MLD2_REPORT:
-@@ -1782,7 +1813,7 @@ static int br_multicast_ipv6_rcv(struct
+@@ -1782,7 +1810,7 @@ static int br_multicast_ipv6_rcv(struct
 			goto out;
 		}
 		mld = (struct mld_msg *)skb_transport_header(skb2);