Release 4.18 net/netfilter/xt_nat.c
/*
* (C) 1999-2001 Paul `Rusty' Russell
* (C) 2002-2006 Netfilter Core Team <coreteam@netfilter.org>
* (C) 2011 Patrick McHardy <kaber@trash.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#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_core.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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 34 | 64.15% | 1 | 20.00% |
| Florian Westphal | 14 | 26.42% | 2 | 40.00% |
| Jozsef Kadlecsik | 4 | 7.55% | 1 | 20.00% |
| Jan Engelhardt | 1 | 1.89% | 1 | 20.00% |
| Total | 53 | 100.00% | 5 | 100.00% |
static int xt_nat_checkentry(const struct xt_tgchk_param *par)
{
return nf_ct_netns_get(par->net, par->family);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Florian Westphal | 22 | 91.67% | 1 | 50.00% |
| Patrick McHardy | 2 | 8.33% | 1 | 50.00% |
| Total | 24 | 100.00% | 2 | 100.00% |
static void xt_nat_destroy(const struct xt_tgdtor_param *par)
{
nf_ct_netns_put(par->net, par->family);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Florian Westphal | 23 | 100.00% | 1 | 100.00% |
| Total | 23 | 100.00% | 1 | 100.00% |
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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 88 | 78.57% | 1 | 33.33% |
| Thierry Du Tre | 18 | 16.07% | 1 | 33.33% |
| Jozsef Kadlecsik | 6 | 5.36% | 1 | 33.33% |
| Total | 112 | 100.00% | 3 | 100.00% |
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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jozsef Kadlecsik | 60 | 60.00% | 1 | 11.11% |
| Patrick McHardy | 27 | 27.00% | 2 | 22.22% |
| Jan Engelhardt | 5 | 5.00% | 2 | 22.22% |
| Varsha Rao | 4 | 4.00% | 1 | 11.11% |
| Herbert Xu | 2 | 2.00% | 1 | 11.11% |
| Thierry Du Tre | 1 | 1.00% | 1 | 11.11% |
| Eric Dumazet | 1 | 1.00% | 1 | 11.11% |
| Total | 100 | 100.00% | 9 | 100.00% |
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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jozsef Kadlecsik | 59 | 61.46% | 1 | 12.50% |
| Patrick McHardy | 28 | 29.17% | 2 | 25.00% |
| Varsha Rao | 4 | 4.17% | 1 | 12.50% |
| Herbert Xu | 2 | 2.08% | 1 | 12.50% |
| Jan Engelhardt | 2 | 2.08% | 2 | 25.00% |
| Thierry Du Tre | 1 | 1.04% | 1 | 12.50% |
| Total | 96 | 100.00% | 8 | 100.00% |
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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 53 | 45.30% | 1 | 14.29% |
| Thierry Du Tre | 37 | 31.62% | 1 | 14.29% |
| Jozsef Kadlecsik | 18 | 15.38% | 1 | 14.29% |
| Jan Engelhardt | 5 | 4.27% | 3 | 42.86% |
| Varsha Rao | 4 | 3.42% | 1 | 14.29% |
| Total | 117 | 100.00% | 7 | 100.00% |
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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Thierry Du Tre | 92 | 81.42% | 1 | 16.67% |
| Jozsef Kadlecsik | 9 | 7.96% | 1 | 16.67% |
| Patrick McHardy | 9 | 7.96% | 1 | 16.67% |
| Jan Engelhardt | 3 | 2.65% | 3 | 50.00% |
| Total | 113 | 100.00% | 6 | 100.00% |
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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Thierry Du Tre | 81 | 100.00% | 1 | 100.00% |
| Total | 81 | 100.00% | 1 | 100.00% |
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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 26 | 33.77% | 2 | 28.57% |
| Thierry Du Tre | 21 | 27.27% | 1 | 14.29% |
| Jozsef Kadlecsik | 19 | 24.68% | 1 | 14.29% |
| Changli Gao | 5 | 6.49% | 1 | 14.29% |
| Varsha Rao | 4 | 5.19% | 1 | 14.29% |
| Jan Engelhardt | 2 | 2.60% | 1 | 14.29% |
| Total | 77 | 100.00% | 7 | 100.00% |
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,
.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));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jozsef Kadlecsik | 7 | 35.00% | 1 | 20.00% |
| Patrick McHardy | 7 | 35.00% | 1 | 20.00% |
| Alexey Dobriyan | 5 | 25.00% | 2 | 40.00% |
| Jan Engelhardt | 1 | 5.00% | 1 | 20.00% |
| Total | 20 | 100.00% | 5 | 100.00% |
static void __exit xt_nat_exit(void)
{
xt_unregister_targets(xt_nat_target_reg, ARRAY_SIZE(xt_nat_target_reg));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Alexey Dobriyan | 10 | 52.63% | 2 | 66.67% |
| Patrick McHardy | 9 | 47.37% | 1 | 33.33% |
| Total | 19 | 100.00% | 3 | 100.00% |
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");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Patrick McHardy | 458 | 35.98% | 6 | 24.00% |
| Thierry Du Tre | 363 | 28.52% | 1 | 4.00% |
| Jozsef Kadlecsik | 287 | 22.55% | 1 | 4.00% |
| Florian Westphal | 96 | 7.54% | 2 | 8.00% |
| Alexey Dobriyan | 20 | 1.57% | 3 | 12.00% |
| Jan Engelhardt | 19 | 1.49% | 7 | 28.00% |
| Varsha Rao | 16 | 1.26% | 1 | 4.00% |
| Changli Gao | 5 | 0.39% | 1 | 4.00% |
| Elison Niven | 4 | 0.31% | 1 | 4.00% |
| Herbert Xu | 4 | 0.31% | 1 | 4.00% |
| Eric Dumazet | 1 | 0.08% | 1 | 4.00% |
| Total | 1273 | 100.00% | 25 | 100.00% |
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