netfilter: nf_nat_proto_icmpv6:: fix wrong comparison in icmpv6_manip_pkt

In commit 58a317f1 (netfilter: ipv6: add IPv6 NAT support), icmpv6_manip_pkt
was added with an incorrect comparison of ICMP codes to types.  This causes
problems when using NAT rules with the --random option.  Correct the
comparison.

This closes netfilter bugzilla #851, reported by Alexander Neumann.

Signed-off-by: Phil Oester <kernel@linuxace.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/net/ipv6/netfilter/nf_nat_proto_icmpv6.c b/net/ipv6/netfilter/nf_nat_proto_icmpv6.c
index 61aaf70..2205e8e 100644 (file)
--- a/net/ipv6/netfilter/nf_nat_proto_icmpv6.c
+++ b/net/ipv6/netfilter/nf_nat_proto_icmpv6.c
@@ -69,8 +69,8 @@ icmpv6_manip_pkt(struct sk_buff *skb,
        hdr = (struct icmp6hdr *)(skb->data + hdroff);
        l3proto->csum_update(skb, iphdroff, &hdr->icmp6_cksum,
                             tuple, maniptype);
-       if (hdr->icmp6_code == ICMPV6_ECHO_REQUEST ||
-           hdr->icmp6_code == ICMPV6_ECHO_REPLY) {
+       if (hdr->icmp6_type == ICMPV6_ECHO_REQUEST ||
+           hdr->icmp6_type == ICMPV6_ECHO_REPLY) {
                inet_proto_csum_replace2(&hdr->icmp6_cksum, skb,
                                         hdr->icmp6_identifier,
                                         tuple->src.u.icmp.id, 0);