2019-05-27 06:55:01 +00:00
|
|
|
// SPDX-License-Identifier: GPL-2.0-or-later
|
2007-09-27 19:48:05 +00:00
|
|
|
/*
|
|
|
|
* Stateless NAT actions
|
|
|
|
*
|
|
|
|
* Copyright (c) 2007 Herbert Xu <herbert@gondor.apana.org.au>
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/errno.h>
|
|
|
|
#include <linux/init.h>
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/netfilter.h>
|
|
|
|
#include <linux/rtnetlink.h>
|
|
|
|
#include <linux/skbuff.h>
|
|
|
|
#include <linux/slab.h>
|
|
|
|
#include <linux/spinlock.h>
|
|
|
|
#include <linux/string.h>
|
|
|
|
#include <linux/tc_act/tc_nat.h>
|
|
|
|
#include <net/act_api.h>
|
2019-03-20 14:00:06 +00:00
|
|
|
#include <net/pkt_cls.h>
|
2007-09-27 19:48:05 +00:00
|
|
|
#include <net/icmp.h>
|
|
|
|
#include <net/ip.h>
|
|
|
|
#include <net/netlink.h>
|
|
|
|
#include <net/tc_act/tc_nat.h>
|
|
|
|
#include <net/tcp.h>
|
|
|
|
#include <net/udp.h>
|
|
|
|
|
|
|
|
|
2016-07-25 23:09:41 +00:00
|
|
|
static struct tc_action_ops act_nat_ops;
|
2016-02-22 23:57:53 +00:00
|
|
|
|
2008-01-24 04:36:30 +00:00
|
|
|
static const struct nla_policy nat_policy[TCA_NAT_MAX + 1] = {
|
|
|
|
[TCA_NAT_PARMS] = { .len = sizeof(struct tc_nat) },
|
|
|
|
};
|
|
|
|
|
2013-01-14 05:15:39 +00:00
|
|
|
static int tcf_nat_init(struct net *net, struct nlattr *nla, struct nlattr *est,
|
2021-07-29 23:12:14 +00:00
|
|
|
struct tc_action **a, struct tcf_proto *tp,
|
2019-10-30 14:09:05 +00:00
|
|
|
u32 flags, struct netlink_ext_ack *extack)
|
2007-09-27 19:48:05 +00:00
|
|
|
{
|
2022-09-08 04:14:33 +00:00
|
|
|
struct tc_action_net *tn = net_generic(net, act_nat_ops.net_id);
|
2021-07-29 23:12:14 +00:00
|
|
|
bool bind = flags & TCA_ACT_FLAGS_BIND;
|
2008-01-23 06:11:50 +00:00
|
|
|
struct nlattr *tb[TCA_NAT_MAX + 1];
|
2019-03-20 14:00:06 +00:00
|
|
|
struct tcf_chain *goto_ch = NULL;
|
2007-09-27 19:48:05 +00:00
|
|
|
struct tc_nat *parm;
|
2008-01-24 04:33:32 +00:00
|
|
|
int ret = 0, err;
|
2007-09-27 19:48:05 +00:00
|
|
|
struct tcf_nat *p;
|
2019-08-01 13:02:51 +00:00
|
|
|
u32 index;
|
2007-09-27 19:48:05 +00:00
|
|
|
|
2008-01-24 04:33:32 +00:00
|
|
|
if (nla == NULL)
|
2007-09-27 19:48:05 +00:00
|
|
|
return -EINVAL;
|
|
|
|
|
netlink: make validation more configurable for future strictness
We currently have two levels of strict validation:
1) liberal (default)
- undefined (type >= max) & NLA_UNSPEC attributes accepted
- attribute length >= expected accepted
- garbage at end of message accepted
2) strict (opt-in)
- NLA_UNSPEC attributes accepted
- attribute length >= expected accepted
Split out parsing strictness into four different options:
* TRAILING - check that there's no trailing data after parsing
attributes (in message or nested)
* MAXTYPE - reject attrs > max known type
* UNSPEC - reject attributes with NLA_UNSPEC policy entries
* STRICT_ATTRS - strictly validate attribute size
The default for future things should be *everything*.
The current *_strict() is a combination of TRAILING and MAXTYPE,
and is renamed to _deprecated_strict().
The current regular parsing has none of this, and is renamed to
*_parse_deprecated().
Additionally it allows us to selectively set one of the new flags
even on old policies. Notably, the UNSPEC flag could be useful in
this case, since it can be arranged (by filling in the policy) to
not be an incompatible userspace ABI change, but would then going
forward prevent forgetting attribute entries. Similar can apply
to the POLICY flag.
We end up with the following renames:
* nla_parse -> nla_parse_deprecated
* nla_parse_strict -> nla_parse_deprecated_strict
* nlmsg_parse -> nlmsg_parse_deprecated
* nlmsg_parse_strict -> nlmsg_parse_deprecated_strict
* nla_parse_nested -> nla_parse_nested_deprecated
* nla_validate_nested -> nla_validate_nested_deprecated
Using spatch, of course:
@@
expression TB, MAX, HEAD, LEN, POL, EXT;
@@
-nla_parse(TB, MAX, HEAD, LEN, POL, EXT)
+nla_parse_deprecated(TB, MAX, HEAD, LEN, POL, EXT)
@@
expression NLH, HDRLEN, TB, MAX, POL, EXT;
@@
-nlmsg_parse(NLH, HDRLEN, TB, MAX, POL, EXT)
+nlmsg_parse_deprecated(NLH, HDRLEN, TB, MAX, POL, EXT)
@@
expression NLH, HDRLEN, TB, MAX, POL, EXT;
@@
-nlmsg_parse_strict(NLH, HDRLEN, TB, MAX, POL, EXT)
+nlmsg_parse_deprecated_strict(NLH, HDRLEN, TB, MAX, POL, EXT)
@@
expression TB, MAX, NLA, POL, EXT;
@@
-nla_parse_nested(TB, MAX, NLA, POL, EXT)
+nla_parse_nested_deprecated(TB, MAX, NLA, POL, EXT)
@@
expression START, MAX, POL, EXT;
@@
-nla_validate_nested(START, MAX, POL, EXT)
+nla_validate_nested_deprecated(START, MAX, POL, EXT)
@@
expression NLH, HDRLEN, MAX, POL, EXT;
@@
-nlmsg_validate(NLH, HDRLEN, MAX, POL, EXT)
+nlmsg_validate_deprecated(NLH, HDRLEN, MAX, POL, EXT)
For this patch, don't actually add the strict, non-renamed versions
yet so that it breaks compile if I get it wrong.
Also, while at it, make nla_validate and nla_parse go down to a
common __nla_validate_parse() function to avoid code duplication.
Ultimately, this allows us to have very strict validation for every
new caller of nla_parse()/nlmsg_parse() etc as re-introduced in the
next patch, while existing things will continue to work as is.
In effect then, this adds fully strict validation for any new command.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-04-26 12:07:28 +00:00
|
|
|
err = nla_parse_nested_deprecated(tb, TCA_NAT_MAX, nla, nat_policy,
|
|
|
|
NULL);
|
2008-01-24 04:33:32 +00:00
|
|
|
if (err < 0)
|
|
|
|
return err;
|
|
|
|
|
2008-01-24 04:36:30 +00:00
|
|
|
if (tb[TCA_NAT_PARMS] == NULL)
|
2007-09-27 19:48:05 +00:00
|
|
|
return -EINVAL;
|
2008-01-23 06:11:50 +00:00
|
|
|
parm = nla_data(tb[TCA_NAT_PARMS]);
|
2019-08-01 13:02:51 +00:00
|
|
|
index = parm->index;
|
|
|
|
err = tcf_idr_check_alloc(tn, &index, a, bind);
|
2018-07-05 14:24:32 +00:00
|
|
|
if (!err) {
|
2019-08-01 13:02:51 +00:00
|
|
|
ret = tcf_idr_create(tn, index, est, a,
|
2021-12-17 18:16:17 +00:00
|
|
|
&act_nat_ops, bind, false, flags);
|
2018-07-05 14:24:32 +00:00
|
|
|
if (ret) {
|
2019-08-01 13:02:51 +00:00
|
|
|
tcf_idr_cleanup(tn, index);
|
2014-02-12 01:07:31 +00:00
|
|
|
return ret;
|
2018-07-05 14:24:32 +00:00
|
|
|
}
|
2007-09-27 19:48:05 +00:00
|
|
|
ret = ACT_P_CREATED;
|
2018-07-05 14:24:32 +00:00
|
|
|
} else if (err > 0) {
|
2013-12-23 13:02:11 +00:00
|
|
|
if (bind)
|
|
|
|
return 0;
|
2021-07-29 23:12:14 +00:00
|
|
|
if (!(flags & TCA_ACT_FLAGS_REPLACE)) {
|
2018-07-05 14:24:30 +00:00
|
|
|
tcf_idr_release(*a, bind);
|
2007-09-27 19:48:05 +00:00
|
|
|
return -EEXIST;
|
2018-07-05 14:24:30 +00:00
|
|
|
}
|
2018-07-05 14:24:32 +00:00
|
|
|
} else {
|
|
|
|
return err;
|
2007-09-27 19:48:05 +00:00
|
|
|
}
|
2019-03-20 14:00:06 +00:00
|
|
|
err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack);
|
|
|
|
if (err < 0)
|
|
|
|
goto release_idr;
|
2016-07-25 23:09:41 +00:00
|
|
|
p = to_tcf_nat(*a);
|
2007-09-27 19:48:05 +00:00
|
|
|
|
|
|
|
spin_lock_bh(&p->tcf_lock);
|
|
|
|
p->old_addr = parm->old_addr;
|
|
|
|
p->new_addr = parm->new_addr;
|
|
|
|
p->mask = parm->mask;
|
|
|
|
p->flags = parm->flags;
|
|
|
|
|
2019-03-20 14:00:06 +00:00
|
|
|
goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch);
|
2007-09-27 19:48:05 +00:00
|
|
|
spin_unlock_bh(&p->tcf_lock);
|
2019-03-20 14:00:06 +00:00
|
|
|
if (goto_ch)
|
|
|
|
tcf_chain_put_by_act(goto_ch);
|
2007-09-27 19:48:05 +00:00
|
|
|
|
|
|
|
return ret;
|
2019-03-20 14:00:06 +00:00
|
|
|
release_idr:
|
|
|
|
tcf_idr_release(*a, bind);
|
|
|
|
return err;
|
2007-09-27 19:48:05 +00:00
|
|
|
}
|
|
|
|
|
2018-08-12 13:34:54 +00:00
|
|
|
static int tcf_nat_act(struct sk_buff *skb, const struct tc_action *a,
|
|
|
|
struct tcf_result *res)
|
2007-09-27 19:48:05 +00:00
|
|
|
{
|
2016-07-25 23:09:41 +00:00
|
|
|
struct tcf_nat *p = to_tcf_nat(a);
|
2007-09-27 19:48:05 +00:00
|
|
|
struct iphdr *iph;
|
|
|
|
__be32 old_addr;
|
|
|
|
__be32 new_addr;
|
|
|
|
__be32 mask;
|
|
|
|
__be32 addr;
|
|
|
|
int egress;
|
|
|
|
int action;
|
|
|
|
int ihl;
|
2010-08-03 17:39:18 +00:00
|
|
|
int noff;
|
2007-09-27 19:48:05 +00:00
|
|
|
|
|
|
|
spin_lock(&p->tcf_lock);
|
|
|
|
|
2016-06-06 10:32:53 +00:00
|
|
|
tcf_lastuse_update(&p->tcf_tm);
|
2007-09-27 19:48:05 +00:00
|
|
|
old_addr = p->old_addr;
|
|
|
|
new_addr = p->new_addr;
|
|
|
|
mask = p->mask;
|
|
|
|
egress = p->flags & TCA_NAT_FLAG_EGRESS;
|
|
|
|
action = p->tcf_action;
|
|
|
|
|
2011-01-09 08:30:54 +00:00
|
|
|
bstats_update(&p->tcf_bstats, skb);
|
2007-09-27 19:48:05 +00:00
|
|
|
|
|
|
|
spin_unlock(&p->tcf_lock);
|
|
|
|
|
|
|
|
if (unlikely(action == TC_ACT_SHOT))
|
|
|
|
goto drop;
|
|
|
|
|
2010-08-03 17:39:18 +00:00
|
|
|
noff = skb_network_offset(skb);
|
|
|
|
if (!pskb_may_pull(skb, sizeof(*iph) + noff))
|
2007-09-27 19:48:05 +00:00
|
|
|
goto drop;
|
|
|
|
|
|
|
|
iph = ip_hdr(skb);
|
|
|
|
|
|
|
|
if (egress)
|
|
|
|
addr = iph->saddr;
|
|
|
|
else
|
|
|
|
addr = iph->daddr;
|
|
|
|
|
|
|
|
if (!((old_addr ^ addr) & mask)) {
|
2016-02-19 22:05:25 +00:00
|
|
|
if (skb_try_make_writable(skb, sizeof(*iph) + noff))
|
2007-09-27 19:48:05 +00:00
|
|
|
goto drop;
|
|
|
|
|
|
|
|
new_addr &= mask;
|
|
|
|
new_addr |= addr & ~mask;
|
|
|
|
|
|
|
|
/* Rewrite IP header */
|
|
|
|
iph = ip_hdr(skb);
|
|
|
|
if (egress)
|
|
|
|
iph->saddr = new_addr;
|
|
|
|
else
|
|
|
|
iph->daddr = new_addr;
|
|
|
|
|
2007-11-29 14:17:11 +00:00
|
|
|
csum_replace4(&iph->check, addr, new_addr);
|
2010-05-29 14:26:59 +00:00
|
|
|
} else if ((iph->frag_off & htons(IP_OFFSET)) ||
|
|
|
|
iph->protocol != IPPROTO_ICMP) {
|
|
|
|
goto out;
|
2007-09-27 19:48:05 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
ihl = iph->ihl * 4;
|
|
|
|
|
|
|
|
/* It would be nice to share code with stateful NAT. */
|
|
|
|
switch (iph->frag_off & htons(IP_OFFSET) ? 0 : iph->protocol) {
|
|
|
|
case IPPROTO_TCP:
|
|
|
|
{
|
|
|
|
struct tcphdr *tcph;
|
|
|
|
|
2010-08-03 17:39:18 +00:00
|
|
|
if (!pskb_may_pull(skb, ihl + sizeof(*tcph) + noff) ||
|
2016-02-19 22:05:25 +00:00
|
|
|
skb_try_make_writable(skb, ihl + sizeof(*tcph) + noff))
|
2007-09-27 19:48:05 +00:00
|
|
|
goto drop;
|
|
|
|
|
|
|
|
tcph = (void *)(skb_network_header(skb) + ihl);
|
2015-08-17 20:42:25 +00:00
|
|
|
inet_proto_csum_replace4(&tcph->check, skb, addr, new_addr,
|
|
|
|
true);
|
2007-09-27 19:48:05 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
case IPPROTO_UDP:
|
|
|
|
{
|
|
|
|
struct udphdr *udph;
|
|
|
|
|
2010-08-03 17:39:18 +00:00
|
|
|
if (!pskb_may_pull(skb, ihl + sizeof(*udph) + noff) ||
|
2016-02-19 22:05:25 +00:00
|
|
|
skb_try_make_writable(skb, ihl + sizeof(*udph) + noff))
|
2007-09-27 19:48:05 +00:00
|
|
|
goto drop;
|
|
|
|
|
|
|
|
udph = (void *)(skb_network_header(skb) + ihl);
|
|
|
|
if (udph->check || skb->ip_summed == CHECKSUM_PARTIAL) {
|
2007-11-29 14:17:11 +00:00
|
|
|
inet_proto_csum_replace4(&udph->check, skb, addr,
|
2015-08-17 20:42:25 +00:00
|
|
|
new_addr, true);
|
2007-09-27 19:48:05 +00:00
|
|
|
if (!udph->check)
|
|
|
|
udph->check = CSUM_MANGLED_0;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case IPPROTO_ICMP:
|
|
|
|
{
|
|
|
|
struct icmphdr *icmph;
|
|
|
|
|
2010-08-03 17:39:18 +00:00
|
|
|
if (!pskb_may_pull(skb, ihl + sizeof(*icmph) + noff))
|
2007-09-27 19:48:05 +00:00
|
|
|
goto drop;
|
|
|
|
|
|
|
|
icmph = (void *)(skb_network_header(skb) + ihl);
|
|
|
|
|
2019-11-02 00:12:04 +00:00
|
|
|
if (!icmp_is_err(icmph->type))
|
2007-09-27 19:48:05 +00:00
|
|
|
break;
|
|
|
|
|
2010-08-03 17:39:18 +00:00
|
|
|
if (!pskb_may_pull(skb, ihl + sizeof(*icmph) + sizeof(*iph) +
|
|
|
|
noff))
|
2010-07-09 15:33:25 +00:00
|
|
|
goto drop;
|
|
|
|
|
2010-07-29 13:41:46 +00:00
|
|
|
icmph = (void *)(skb_network_header(skb) + ihl);
|
2007-09-27 19:48:05 +00:00
|
|
|
iph = (void *)(icmph + 1);
|
|
|
|
if (egress)
|
|
|
|
addr = iph->daddr;
|
|
|
|
else
|
|
|
|
addr = iph->saddr;
|
|
|
|
|
|
|
|
if ((old_addr ^ addr) & mask)
|
|
|
|
break;
|
|
|
|
|
2016-02-19 22:05:25 +00:00
|
|
|
if (skb_try_make_writable(skb, ihl + sizeof(*icmph) +
|
|
|
|
sizeof(*iph) + noff))
|
2007-09-27 19:48:05 +00:00
|
|
|
goto drop;
|
|
|
|
|
|
|
|
icmph = (void *)(skb_network_header(skb) + ihl);
|
|
|
|
iph = (void *)(icmph + 1);
|
|
|
|
|
|
|
|
new_addr &= mask;
|
|
|
|
new_addr |= addr & ~mask;
|
|
|
|
|
|
|
|
/* XXX Fix up the inner checksums. */
|
|
|
|
if (egress)
|
|
|
|
iph->daddr = new_addr;
|
|
|
|
else
|
|
|
|
iph->saddr = new_addr;
|
|
|
|
|
2007-11-29 14:17:11 +00:00
|
|
|
inet_proto_csum_replace4(&icmph->checksum, skb, addr, new_addr,
|
2015-08-17 20:42:25 +00:00
|
|
|
false);
|
2007-09-27 19:48:05 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2010-05-29 14:26:59 +00:00
|
|
|
out:
|
2007-09-27 19:48:05 +00:00
|
|
|
return action;
|
|
|
|
|
|
|
|
drop:
|
|
|
|
spin_lock(&p->tcf_lock);
|
|
|
|
p->tcf_qstats.drops++;
|
|
|
|
spin_unlock(&p->tcf_lock);
|
|
|
|
return TC_ACT_SHOT;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int tcf_nat_dump(struct sk_buff *skb, struct tc_action *a,
|
|
|
|
int bind, int ref)
|
|
|
|
{
|
|
|
|
unsigned char *b = skb_tail_pointer(skb);
|
2016-07-25 23:09:41 +00:00
|
|
|
struct tcf_nat *p = to_tcf_nat(a);
|
2010-08-16 20:04:22 +00:00
|
|
|
struct tc_nat opt = {
|
|
|
|
.index = p->tcf_index,
|
2018-07-05 14:24:24 +00:00
|
|
|
.refcnt = refcount_read(&p->tcf_refcnt) - ref,
|
|
|
|
.bindcnt = atomic_read(&p->tcf_bindcnt) - bind,
|
2010-08-16 20:04:22 +00:00
|
|
|
};
|
2007-09-27 19:48:05 +00:00
|
|
|
struct tcf_t t;
|
|
|
|
|
2018-09-03 07:09:20 +00:00
|
|
|
spin_lock_bh(&p->tcf_lock);
|
|
|
|
opt.old_addr = p->old_addr;
|
|
|
|
opt.new_addr = p->new_addr;
|
|
|
|
opt.mask = p->mask;
|
|
|
|
opt.flags = p->flags;
|
|
|
|
opt.action = p->tcf_action;
|
|
|
|
|
2012-03-29 09:11:39 +00:00
|
|
|
if (nla_put(skb, TCA_NAT_PARMS, sizeof(opt), &opt))
|
|
|
|
goto nla_put_failure;
|
2016-06-06 10:32:55 +00:00
|
|
|
|
|
|
|
tcf_tm_dump(&t, &p->tcf_tm);
|
2016-04-26 08:06:18 +00:00
|
|
|
if (nla_put_64bit(skb, TCA_NAT_TM, sizeof(t), &t, TCA_NAT_PAD))
|
2012-03-29 09:11:39 +00:00
|
|
|
goto nla_put_failure;
|
2018-09-03 07:09:20 +00:00
|
|
|
spin_unlock_bh(&p->tcf_lock);
|
2007-09-27 19:48:05 +00:00
|
|
|
|
|
|
|
return skb->len;
|
|
|
|
|
2008-01-23 06:11:50 +00:00
|
|
|
nla_put_failure:
|
2018-09-03 07:09:20 +00:00
|
|
|
spin_unlock_bh(&p->tcf_lock);
|
2007-09-27 19:48:05 +00:00
|
|
|
nlmsg_trim(skb, b);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct tc_action_ops act_nat_ops = {
|
|
|
|
.kind = "nat",
|
2019-02-10 12:25:00 +00:00
|
|
|
.id = TCA_ID_NAT,
|
2007-09-27 19:48:05 +00:00
|
|
|
.owner = THIS_MODULE,
|
2018-08-12 13:34:54 +00:00
|
|
|
.act = tcf_nat_act,
|
2007-09-27 19:48:05 +00:00
|
|
|
.dump = tcf_nat_dump,
|
|
|
|
.init = tcf_nat_init,
|
2016-07-25 23:09:41 +00:00
|
|
|
.size = sizeof(struct tcf_nat),
|
2016-02-22 23:57:53 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
static __net_init int nat_init_net(struct net *net)
|
|
|
|
{
|
2022-09-08 04:14:33 +00:00
|
|
|
struct tc_action_net *tn = net_generic(net, act_nat_ops.net_id);
|
2016-02-22 23:57:53 +00:00
|
|
|
|
2019-08-25 17:01:32 +00:00
|
|
|
return tc_action_net_init(net, tn, &act_nat_ops);
|
2016-02-22 23:57:53 +00:00
|
|
|
}
|
|
|
|
|
2017-12-11 23:35:03 +00:00
|
|
|
static void __net_exit nat_exit_net(struct list_head *net_list)
|
2016-02-22 23:57:53 +00:00
|
|
|
{
|
2022-09-08 04:14:33 +00:00
|
|
|
tc_action_net_exit(net_list, act_nat_ops.net_id);
|
2016-02-22 23:57:53 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static struct pernet_operations nat_net_ops = {
|
|
|
|
.init = nat_init_net,
|
2017-12-11 23:35:03 +00:00
|
|
|
.exit_batch = nat_exit_net,
|
2022-09-08 04:14:33 +00:00
|
|
|
.id = &act_nat_ops.net_id,
|
2016-02-22 23:57:53 +00:00
|
|
|
.size = sizeof(struct tc_action_net),
|
2007-09-27 19:48:05 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
MODULE_DESCRIPTION("Stateless NAT actions");
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
|
|
|
|
static int __init nat_init_module(void)
|
|
|
|
{
|
2016-02-22 23:57:53 +00:00
|
|
|
return tcf_register_action(&act_nat_ops, &nat_net_ops);
|
2007-09-27 19:48:05 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit nat_cleanup_module(void)
|
|
|
|
{
|
2016-02-22 23:57:53 +00:00
|
|
|
tcf_unregister_action(&act_nat_ops, &nat_net_ops);
|
2007-09-27 19:48:05 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
module_init(nat_init_module);
|
|
|
|
module_exit(nat_cleanup_module);
|