Contributors: 19
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Patrick McHardy |
504 |
39.10% |
12 |
24.00% |
| Jozsef Kadlecsik |
333 |
25.83% |
1 |
2.00% |
| Florian Westphal |
102 |
7.91% |
3 |
6.00% |
| Thierry Du Tre |
82 |
6.36% |
1 |
2.00% |
| Linus Torvalds (pre-git) |
77 |
5.97% |
7 |
14.00% |
| Harald Welte |
43 |
3.34% |
3 |
6.00% |
| Jan Engelhardt |
42 |
3.26% |
9 |
18.00% |
| Varsha Rao |
23 |
1.78% |
1 |
2.00% |
| Alexey Dobriyan |
21 |
1.63% |
3 |
6.00% |
| Martin Josefsson |
12 |
0.93% |
1 |
2.00% |
| Arturo Borrero Gonzalez |
12 |
0.93% |
1 |
2.00% |
| Herbert Xu |
9 |
0.70% |
1 |
2.00% |
| Elison Niven |
6 |
0.47% |
1 |
2.00% |
| Philip Craig |
5 |
0.39% |
1 |
2.00% |
| Changli Gao |
5 |
0.39% |
1 |
2.00% |
| Rob Gill |
5 |
0.39% |
1 |
2.00% |
| Yasuyuki Kozakai |
3 |
0.23% |
1 |
2.00% |
| Eric Dumazet |
3 |
0.23% |
1 |
2.00% |
| Thomas Gleixner |
2 |
0.16% |
1 |
2.00% |
| Total |
1289 |
|
50 |
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* (C) 1999-2001 Paul `Rusty' Russell
* (C) 2002-2006 Netfilter Core Team <coreteam@netfilter.org>
* (C) 2011 Patrick McHardy <kaber@trash.net>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/netfilter.h>
#include <linux/netfilter/x_tables.h>
#include <net/netfilter/nf_nat.h>
static int xt_nat_checkentry_v0(const struct xt_tgchk_param *par)
{
const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
if (mr->rangesize != 1) {
pr_info_ratelimited("multiple ranges no longer supported\n");
return -EINVAL;
}
return nf_ct_netns_get(par->net, par->family);
}
static int xt_nat_checkentry(const struct xt_tgchk_param *par)
{
return nf_ct_netns_get(par->net, par->family);
}
static void xt_nat_destroy(const struct xt_tgdtor_param *par)
{
nf_ct_netns_put(par->net, par->family);
}
static void xt_nat_convert_range(struct nf_nat_range2 *dst,
const struct nf_nat_ipv4_range *src)
{
memset(&dst->min_addr, 0, sizeof(dst->min_addr));
memset(&dst->max_addr, 0, sizeof(dst->max_addr));
memset(&dst->base_proto, 0, sizeof(dst->base_proto));
dst->flags = src->flags;
dst->min_addr.ip = src->min_ip;
dst->max_addr.ip = src->max_ip;
dst->min_proto = src->min;
dst->max_proto = src->max;
}
static unsigned int
xt_snat_target_v0(struct sk_buff *skb, const struct xt_action_param *par)
{
const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
struct nf_nat_range2 range;
enum ip_conntrack_info ctinfo;
struct nf_conn *ct;
ct = nf_ct_get(skb, &ctinfo);
WARN_ON(!(ct != NULL &&
(ctinfo == IP_CT_NEW || ctinfo == IP_CT_RELATED ||
ctinfo == IP_CT_RELATED_REPLY)));
xt_nat_convert_range(&range, &mr->range[0]);
return nf_nat_setup_info(ct, &range, NF_NAT_MANIP_SRC);
}
static unsigned int
xt_dnat_target_v0(struct sk_buff *skb, const struct xt_action_param *par)
{
const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
struct nf_nat_range2 range;
enum ip_conntrack_info ctinfo;
struct nf_conn *ct;
ct = nf_ct_get(skb, &ctinfo);
WARN_ON(!(ct != NULL &&
(ctinfo == IP_CT_NEW || ctinfo == IP_CT_RELATED)));
xt_nat_convert_range(&range, &mr->range[0]);
return nf_nat_setup_info(ct, &range, NF_NAT_MANIP_DST);
}
static unsigned int
xt_snat_target_v1(struct sk_buff *skb, const struct xt_action_param *par)
{
const struct nf_nat_range *range_v1 = par->targinfo;
struct nf_nat_range2 range;
enum ip_conntrack_info ctinfo;
struct nf_conn *ct;
ct = nf_ct_get(skb, &ctinfo);
WARN_ON(!(ct != NULL &&
(ctinfo == IP_CT_NEW || ctinfo == IP_CT_RELATED ||
ctinfo == IP_CT_RELATED_REPLY)));
memcpy(&range, range_v1, sizeof(*range_v1));
memset(&range.base_proto, 0, sizeof(range.base_proto));
return nf_nat_setup_info(ct, &range, NF_NAT_MANIP_SRC);
}
static unsigned int
xt_dnat_target_v1(struct sk_buff *skb, const struct xt_action_param *par)
{
const struct nf_nat_range *range_v1 = par->targinfo;
struct nf_nat_range2 range;
enum ip_conntrack_info ctinfo;
struct nf_conn *ct;
ct = nf_ct_get(skb, &ctinfo);
WARN_ON(!(ct != NULL &&
(ctinfo == IP_CT_NEW || ctinfo == IP_CT_RELATED)));
memcpy(&range, range_v1, sizeof(*range_v1));
memset(&range.base_proto, 0, sizeof(range.base_proto));
return nf_nat_setup_info(ct, &range, NF_NAT_MANIP_DST);
}
static unsigned int
xt_snat_target_v2(struct sk_buff *skb, const struct xt_action_param *par)
{
const struct nf_nat_range2 *range = par->targinfo;
enum ip_conntrack_info ctinfo;
struct nf_conn *ct;
ct = nf_ct_get(skb, &ctinfo);
WARN_ON(!(ct != NULL &&
(ctinfo == IP_CT_NEW || ctinfo == IP_CT_RELATED ||
ctinfo == IP_CT_RELATED_REPLY)));
return nf_nat_setup_info(ct, range, NF_NAT_MANIP_SRC);
}
static unsigned int
xt_dnat_target_v2(struct sk_buff *skb, const struct xt_action_param *par)
{
const struct nf_nat_range2 *range = par->targinfo;
enum ip_conntrack_info ctinfo;
struct nf_conn *ct;
ct = nf_ct_get(skb, &ctinfo);
WARN_ON(!(ct != NULL &&
(ctinfo == IP_CT_NEW || ctinfo == IP_CT_RELATED)));
return nf_nat_setup_info(ct, range, NF_NAT_MANIP_DST);
}
static struct xt_target xt_nat_target_reg[] __read_mostly = {
{
.name = "SNAT",
.revision = 0,
.checkentry = xt_nat_checkentry_v0,
.destroy = xt_nat_destroy,
.target = xt_snat_target_v0,
.targetsize = sizeof(struct nf_nat_ipv4_multi_range_compat),
.family = NFPROTO_IPV4,
.table = "nat",
.hooks = (1 << NF_INET_POST_ROUTING) |
(1 << NF_INET_LOCAL_IN),
.me = THIS_MODULE,
},
{
.name = "DNAT",
.revision = 0,
.checkentry = xt_nat_checkentry_v0,
.destroy = xt_nat_destroy,
.target = xt_dnat_target_v0,
.targetsize = sizeof(struct nf_nat_ipv4_multi_range_compat),
.family = NFPROTO_IPV4,
.table = "nat",
.hooks = (1 << NF_INET_PRE_ROUTING) |
(1 << NF_INET_LOCAL_OUT),
.me = THIS_MODULE,
},
{
.name = "SNAT",
.revision = 1,
.checkentry = xt_nat_checkentry,
.destroy = xt_nat_destroy,
.target = xt_snat_target_v1,
.targetsize = sizeof(struct nf_nat_range),
.table = "nat",
.hooks = (1 << NF_INET_POST_ROUTING) |
(1 << NF_INET_LOCAL_IN),
.me = THIS_MODULE,
},
{
.name = "DNAT",
.revision = 1,
.checkentry = xt_nat_checkentry,
.destroy = xt_nat_destroy,
.target = xt_dnat_target_v1,
.targetsize = sizeof(struct nf_nat_range),
.table = "nat",
.hooks = (1 << NF_INET_PRE_ROUTING) |
(1 << NF_INET_LOCAL_OUT),
.me = THIS_MODULE,
},
{
.name = "SNAT",
.revision = 2,
.checkentry = xt_nat_checkentry,
.destroy = xt_nat_destroy,
.target = xt_snat_target_v2,
.targetsize = sizeof(struct nf_nat_range2),
.table = "nat",
.hooks = (1 << NF_INET_POST_ROUTING) |
(1 << NF_INET_LOCAL_IN),
.me = THIS_MODULE,
},
{
.name = "DNAT",
.revision = 2,
.checkentry = xt_nat_checkentry,
.destroy = xt_nat_destroy,
.target = xt_dnat_target_v2,
.targetsize = sizeof(struct nf_nat_range2),
.table = "nat",
.hooks = (1 << NF_INET_PRE_ROUTING) |
(1 << NF_INET_LOCAL_OUT),
.me = THIS_MODULE,
},
};
static int __init xt_nat_init(void)
{
return xt_register_targets(xt_nat_target_reg,
ARRAY_SIZE(xt_nat_target_reg));
}
static void __exit xt_nat_exit(void)
{
xt_unregister_targets(xt_nat_target_reg, ARRAY_SIZE(xt_nat_target_reg));
}
module_init(xt_nat_init);
module_exit(xt_nat_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
MODULE_ALIAS("ipt_SNAT");
MODULE_ALIAS("ipt_DNAT");
MODULE_ALIAS("ip6t_SNAT");
MODULE_ALIAS("ip6t_DNAT");
MODULE_DESCRIPTION("SNAT and DNAT targets support");