[IPV4]: Be more verbose about invalid ICMPs sent to broadcast.

net/ipv4/icmp.c

@@ -659,8 +659,12 @@ static void icmp_unreach(struct sk_buff *skb)
 	    inet_addr_type(iph->daddr) == RTN_BROADCAST) {
 		if (net_ratelimit())
 			printk(KERN_WARNING "%u.%u.%u.%u sent an invalid ICMP "
-					    "error to a broadcast.\n",
-			       NIPQUAD(skb->nh.iph->saddr));
+					    "type %u, code %u "
+					    "error to a broadcast: %u.%u.%u.%u on %s\n",
+			       NIPQUAD(iph->saddr),
+			       icmph->type, icmph->code,
+			       NIPQUAD(iph->daddr),
+			       skb->dev->name);
 		goto out;
 	}