diff options
Diffstat (limited to 'net/bridge/br_forward.c')
| -rw-r--r-- | net/bridge/br_forward.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/net/bridge/br_forward.c b/net/bridge/br_forward.c index 86cd0712d63e..d61e6f741125 100644 --- a/net/bridge/br_forward.c +++ b/net/bridge/br_forward.c @@ -186,3 +186,70 @@ void br_flood_forward(struct net_bridge *br, struct sk_buff *skb, { br_flood(br, skb, skb2, __br_forward); } + +#ifdef CONFIG_BRIDGE_IGMP_SNOOPING +/* called with rcu_read_lock */ +static void br_multicast_flood(struct net_bridge_mdb_entry *mdst, + struct sk_buff *skb, struct sk_buff *skb0, + void (*__packet_hook)( + const struct net_bridge_port *p, + struct sk_buff *skb)) +{ + struct net_device *dev = BR_INPUT_SKB_CB(skb)->brdev; + struct net_bridge *br = netdev_priv(dev); + struct net_bridge_port *port; + struct net_bridge_port *lport, *rport; + struct net_bridge_port *prev; + struct net_bridge_port_group *p; + struct hlist_node *rp; + + prev = NULL; + + rp = br->router_list.first; + p = mdst ? mdst->ports : NULL; + while (p || rp) { + lport = p ? p->port : NULL; + rport = rp ? hlist_entry(rp, struct net_bridge_port, rlist) : + NULL; + + port = (unsigned long)lport > (unsigned long)rport ? + lport : rport; + + prev = maybe_deliver(prev, port, skb, __packet_hook); + if (IS_ERR(prev)) + goto out; + + if ((unsigned long)lport >= (unsigned long)port) + p = p->next; + if ((unsigned long)rport >= (unsigned long)port) + rp = rp->next; + } + + if (!prev) + goto out; + + if (skb0) + deliver_clone(prev, skb, __packet_hook); + else + __packet_hook(prev, skb); + return; + +out: + if (!skb0) + kfree_skb(skb); +} + +/* called with rcu_read_lock */ +void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, + struct sk_buff *skb) +{ + br_multicast_flood(mdst, skb, NULL, __br_deliver); +} + +/* called with rcu_read_lock */ +void br_multicast_forward(struct net_bridge_mdb_entry *mdst, + struct sk_buff *skb, struct sk_buff *skb2) +{ + br_multicast_flood(mdst, skb, skb2, __br_forward); +} +#endif |