#include <linux/netfilter_bridge.h>
#include "br_private.h"
+static int deliver_clone(const struct net_bridge_port *prev,
+ struct sk_buff *skb,
+ void (*__packet_hook)(const struct net_bridge_port *p,
+ struct sk_buff *skb));
+
/* Don't forward packets to originating port or forwarding diasabled */
static inline int should_deliver(const struct net_bridge_port *p,
const struct sk_buff *skb)
}
/* called with rcu_read_lock */
-void br_forward(const struct net_bridge_port *to, struct sk_buff *skb)
+void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, struct sk_buff *skb0)
{
if (should_deliver(to, skb)) {
- __br_forward(to, skb);
+ if (skb0)
+ deliver_clone(to, skb, __br_forward);
+ else
+ __br_forward(to, skb);
return;
}
- kfree_skb(skb);
+ if (!skb0)
+ kfree_skb(skb);
}
-static int deliver_clone(struct net_bridge_port *prev, struct sk_buff *skb,
+static int deliver_clone(const struct net_bridge_port *prev,
+ struct sk_buff *skb,
void (*__packet_hook)(const struct net_bridge_port *p,
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