If multicast snooping is enabled, multicast packets may not always end up
on the local bridge interface, if the host is not a member of the multicast
group. Similar to how IFF_PROMISC allows all packets to be received
locally, let IFF_ALLMULTI allow all multicast packets to be received.
Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
Signed-off-by: Shengyu Qu <wiagn233@xxxxxxxxxxx>
---
Since Felix didn't send v2 for this patch, I decided to do it by myself.
Changes since v1:
- Move to net-next
- Changed code according to Nikolay's advice
---
net/bridge/br_input.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c
index 232133a0fd21..aefcc3614373 100644
--- a/net/bridge/br_input.c
+++ b/net/bridge/br_input.c
@@ -189,7 +189,8 @@ int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb
if ((mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) &&
br_multicast_querier_exists(brmctx, eth_hdr(skb), mdst)) {
if ((mdst && mdst->host_joined) ||
- br_multicast_is_router(brmctx, skb)) {
+ br_multicast_is_router(brmctx, skb) ||
+ (br->dev->flags & IFF_ALLMULTI)) {
local_rcv = true;
DEV_STATS_INC(br->dev, multicast);
}
--
2.43.0
