diff options
| -rw-r--r-- | net/bridge/br_forward.c | 67 | ||||
| -rw-r--r-- | net/bridge/br_private.h | 15 |
2 files changed, 82 insertions, 0 deletions
diff --git a/net/bridge/br_forward.c b/net/bridge/br_forward.c index 86cd0712d63..d61e6f74112 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 diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index 44345c9afdd..c85943c2b23 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -293,6 +293,10 @@ extern void br_multicast_disable_port(struct net_bridge_port *port); extern void br_multicast_init(struct net_bridge *br); extern void br_multicast_open(struct net_bridge *br); extern void br_multicast_stop(struct net_bridge *br); +extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, + struct sk_buff *skb); +extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst, + struct sk_buff *skb, struct sk_buff *skb2); #else static inline int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, @@ -334,6 +338,17 @@ static inline void br_multicast_open(struct net_bridge *br) static inline void br_multicast_stop(struct net_bridge *br) { } + +static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst, + struct sk_buff *skb) +{ +} + +static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst, + struct sk_buff *skb, + struct sk_buff *skb2) +{ +} #endif static inline bool br_multicast_is_router(struct net_bridge *br) |