From 0d03a6f3467d93f1ae7b04e3fed6fc11a1a9f9e4 Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Thu, 10 Nov 2011 23:03:45 +0100
Subject: Add ICMP errors for untranslatable addresses

---
 ip6t_DNPTV6.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'ip6t_DNPTV6.c')

diff --git a/ip6t_DNPTV6.c b/ip6t_DNPTV6.c
index 96d16e8..506d0a5 100644
--- a/ip6t_DNPTV6.c
+++ b/ip6t_DNPTV6.c
@@ -7,6 +7,7 @@
 
 #include <linux/module.h>
 #include <linux/version.h>
+#include <linux/icmpv6.h>
 #include <linux/netfilter_ipv6/ip6_tables.h>
 #include <net/ipv6.h>
 
@@ -35,6 +36,7 @@ static unsigned int dnptv6_tg6(struct sk_buff *skb, const struct xt_action_param
 
 	if (!translate_address(&hdr->daddr, &info->nptv6_prefix, info->nptv6_prefix_len)) {
 		pr_devel("DNPTV6: untranslatable address\n");
+		icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_NOT_NEIGHBOUR, 0);
 		return NF_DROP;
 	}
 
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