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authorPatrick McHardy <kaber@trash.net>2008-04-14 11:15:50 +0200
committerPatrick McHardy <kaber@trash.net>2008-04-14 11:15:50 +0200
commit42cf800c240fa845e9c154429d70d62750e65b64 (patch)
treee3144f6b168499ae946cad846259a8b024379691 /net/ipv4/netfilter
parent9d908a69a32e0171eb5eeac93f2f46ffa4190573 (diff)
[NETFILTER]: nf_nat: remove obsolete check for ICMP redirects
Locally generated ICMP packets have a reference to the conntrack entry of the original packet manually attached by icmp_send(). Therefore the check for locally originated untracked ICMP redirects can never be true. Signed-off-by: Patrick McHardy <kaber@trash.net>
Diffstat (limited to 'net/ipv4/netfilter')
-rw-r--r--net/ipv4/netfilter/nf_nat_standalone.c15
1 files changed, 1 insertions, 14 deletions
diff --git a/net/ipv4/netfilter/nf_nat_standalone.c b/net/ipv4/netfilter/nf_nat_standalone.c
index 4a3e0f85db9..c362f672755 100644
--- a/net/ipv4/netfilter/nf_nat_standalone.c
+++ b/net/ipv4/netfilter/nf_nat_standalone.c
@@ -93,21 +93,8 @@ nf_nat_fn(unsigned int hooknum,
have dropped it. Hence it's the user's responsibilty to
packet filter it out, or implement conntrack/NAT for that
protocol. 8) --RR */
- if (!ct) {
- /* Exception: ICMP redirect to new connection (not in
- hash table yet). We must not let this through, in
- case we're doing NAT to the same network. */
- if (ip_hdr(skb)->protocol == IPPROTO_ICMP) {
- struct icmphdr _hdr, *hp;
-
- hp = skb_header_pointer(skb, ip_hdrlen(skb),
- sizeof(_hdr), &_hdr);
- if (hp != NULL &&
- hp->type == ICMP_REDIRECT)
- return NF_DROP;
- }
+ if (!ct)
return NF_ACCEPT;
- }
/* Don't try to NAT if this packet is not conntracked */
if (ct == &nf_conntrack_untracked)