Phonet: forward incoming packets
Rémi Denis-Courmont [Wed, 14 Oct 2009 00:48:31 +0000 (00:48 +0000)]
Signed-off-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/phonet/af_phonet.c

index cc2eef1..66737aa 100644 (file)
@@ -394,6 +394,38 @@ static int phonet_rcv(struct sk_buff *skb, struct net_device *dev,
                        send_obj_unreachable(skb);
                        send_reset_indications(skb);
                }
+       } else if (unlikely(skb->pkt_type == PACKET_LOOPBACK))
+               goto out; /* Race between address deletion and loopback */
+       else {
+               /* Phonet packet routing */
+               struct net_device *out_dev;
+
+               out_dev = phonet_route_output(net, pn_sockaddr_get_addr(&sa));
+               if (!out_dev) {
+                       LIMIT_NETDEBUG(KERN_WARNING"No Phonet route to %02X\n",
+                                       pn_sockaddr_get_addr(&sa));
+                       goto out;
+               }
+
+               __skb_push(skb, sizeof(struct phonethdr));
+               skb->dev = out_dev;
+               if (out_dev == dev) {
+                       LIMIT_NETDEBUG(KERN_ERR"Phonet loop to %02X on %s\n",
+                                       pn_sockaddr_get_addr(&sa), dev->name);
+                       goto out_dev;
+               }
+               /* Some drivers (e.g. TUN) do not allocate HW header space */
+               if (skb_cow_head(skb, out_dev->hard_header_len))
+                       goto out_dev;
+
+               if (dev_hard_header(skb, out_dev, ETH_P_PHONET, NULL, NULL,
+                                       skb->len) < 0)
+                       goto out_dev;
+               dev_queue_xmit(skb);
+               dev_put(out_dev);
+               return NET_RX_SUCCESS;
+out_dev:
+               dev_put(out_dev);
        }
 
 out: