Phonet: emit errors when a packet cannot be delivered locally

When there is no listener socket for a received packet, send an error
back to the sender.

Signed-off-by: Remi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 0 deletions

diff --git a/include/net/phonet/phonet.h b/include/net/phonet/phonet.h
index 1c6f7e7d5fea..d4e72508e145 100644
--- a/include/net/phonet/phonet.h
+++ b/include/net/phonet/phonet.h
@@ -60,6 +60,11 @@ static inline struct phonethdr *pn_hdr(struct sk_buff *skb)
         return (struct phonethdr *)skb_network_header(skb);
 }
 
+static inline struct phonetmsg *pn_msg(struct sk_buff *skb)
+{
+        return (struct phonetmsg *)skb_transport_header(skb);
+}
+
 /*
  * Get the other party's sockaddr from received skb. The skb begins
  * with a Phonet header.