netfilter: ip6t_REJECT: added missing icmpv6 codes

RFC 4443 added two new codes values for ICMPv6 type 1:

 5 - Source address failed ingress/egress policy
 6 - Reject route to destination

And RFC 7084 states in L-14 that IPv6 Router MUST send ICMPv6 Destination
Unreachable with code 5 for packets forwarded to it that use an address
from a prefix that has been invalidated.

Codes 5 and 6 are more informative subsets of code 1.

Signed-off-by: Andreas Herz <andi@geekosphere.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/include/uapi/linux/netfilter_ipv6/ip6t_REJECT.h b/include/uapi/linux/netfilter_ipv6/ip6t_REJECT.h
index 205ed62..cd2e940 100644 (file)
--- a/include/uapi/linux/netfilter_ipv6/ip6t_REJECT.h
+++ b/include/uapi/linux/netfilter_ipv6/ip6t_REJECT.h
@@ -10,7 +10,9 @@ enum ip6t_reject_with {
        IP6T_ICMP6_ADDR_UNREACH,
        IP6T_ICMP6_PORT_UNREACH,
        IP6T_ICMP6_ECHOREPLY,
-       IP6T_TCP_RESET
+       IP6T_TCP_RESET,
+       IP6T_ICMP6_POLICY_FAIL,
+       IP6T_ICMP6_REJECT_ROUTE
 };
 
 struct ip6t_reject_info {

diff --git a/net/ipv6/netfilter/ip6t_REJECT.c b/net/ipv6/netfilter/ip6t_REJECT.c
index 567367a..0ed841a 100644 (file)
--- a/net/ipv6/netfilter/ip6t_REJECT.c
+++ b/net/ipv6/netfilter/ip6t_REJECT.c
@@ -63,6 +63,12 @@ reject_tg6(struct sk_buff *skb, const struct xt_action_param *par)
        case IP6T_TCP_RESET:
                nf_send_reset6(net, skb, par->hooknum);
                break;
+       case IP6T_ICMP6_POLICY_FAIL:
+               nf_send_unreach6(net, skb, ICMPV6_POLICY_FAIL, par->hooknum);
+               break;
+       case IP6T_ICMP6_REJECT_ROUTE:
+               nf_send_unreach6(net, skb, ICMPV6_REJECT_ROUTE, par->hooknum);
+               break;
        }
 
        return NF_DROP;