Release 4.15 net/netfilter/xt_REDIRECT.c
/*
* (C) 1999-2001 Paul `Rusty' Russell
* (C) 2002-2006 Netfilter Core Team <coreteam@netfilter.org>
* Copyright (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.
*
* Based on Rusty Russell's IPv4 REDIRECT target. Development of IPv6
* NAT funded by Astaro.
*/
#include <linux/if.h>
#include <linux/inetdevice.h>
#include <linux/ip.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/netfilter.h>
#include <linux/types.h>
#include <linux/netfilter_ipv4.h>
#include <linux/netfilter_ipv6.h>
#include <linux/netfilter/x_tables.h>
#include <net/addrconf.h>
#include <net/checksum.h>
#include <net/protocol.h>
#include <net/netfilter/nf_nat.h>
#include <net/netfilter/nf_nat_redirect.h>
static unsigned int
redirect_tg6(struct sk_buff *skb, const struct xt_action_param *par)
{
return nf_nat_redirect_ipv6(skb, par->targinfo, xt_hooknum(par));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Engelhardt | 25 | 75.76% | 1 | 25.00% |
| Arturo Borrero Gonzalez | 4 | 12.12% | 1 | 25.00% |
| Pablo Neira Ayuso | 3 | 9.09% | 1 | 25.00% |
| Harald Welte | 1 | 3.03% | 1 | 25.00% |
| Total | 33 | 100.00% | 4 | 100.00% |
static int redirect_tg6_checkentry(const struct xt_tgchk_param *par)
{
const struct nf_nat_range *range = par->targinfo;
if (range->flags & NF_NAT_RANGE_MAP_IPS)
return -EINVAL;
return nf_ct_netns_get(par->net, par->family);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Engelhardt | 36 | 78.26% | 1 | 50.00% |
| Florian Westphal | 10 | 21.74% | 1 | 50.00% |
| Total | 46 | 100.00% | 2 | 100.00% |
static void redirect_tg_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% |
/* FIXME: Take multiple ranges --RR */
static int redirect_tg4_check(const struct xt_tgchk_param *par)
{
const struct nf_nat_ipv4_multi_range_compat *mr = par->targinfo;
if (mr->range[0].flags & NF_NAT_RANGE_MAP_IPS) {
pr_debug("bad MAP_IPS.\n");
return -EINVAL;
}
if (mr->rangesize != 1) {
pr_debug("bad rangesize %u.\n", mr->rangesize);
return -EINVAL;
}
return nf_ct_netns_get(par->net, par->family);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 54 | 66.67% | 1 | 10.00% |
| Jan Engelhardt | 12 | 14.81% | 5 | 50.00% |
| Florian Westphal | 10 | 12.35% | 1 | 10.00% |
| Patrick McHardy | 5 | 6.17% | 3 | 30.00% |
| Total | 81 | 100.00% | 10 | 100.00% |
static unsigned int
redirect_tg4(struct sk_buff *skb, const struct xt_action_param *par)
{
return nf_nat_redirect_ipv4(skb, par->targinfo, xt_hooknum(par));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 18 | 54.55% | 1 | 12.50% |
| Jan Engelhardt | 5 | 15.15% | 3 | 37.50% |
| Arturo Borrero Gonzalez | 4 | 12.12% | 1 | 12.50% |
| Pablo Neira Ayuso | 3 | 9.09% | 1 | 12.50% |
| Herbert Xu | 2 | 6.06% | 1 | 12.50% |
| Patrick McHardy | 1 | 3.03% | 1 | 12.50% |
| Total | 33 | 100.00% | 8 | 100.00% |
static struct xt_target redirect_tg_reg[] __read_mostly = {
{
.name = "REDIRECT",
.family = NFPROTO_IPV6,
.revision = 0,
.table = "nat",
.checkentry = redirect_tg6_checkentry,
.destroy = redirect_tg_destroy,
.target = redirect_tg6,
.targetsize = sizeof(struct nf_nat_range),
.hooks = (1 << NF_INET_PRE_ROUTING) |
(1 << NF_INET_LOCAL_OUT),
.me = THIS_MODULE,
},
{
.name = "REDIRECT",
.family = NFPROTO_IPV4,
.revision = 0,
.table = "nat",
.target = redirect_tg4,
.checkentry = redirect_tg4_check,
.destroy = redirect_tg_destroy,
.targetsize = sizeof(struct nf_nat_ipv4_multi_range_compat),
.hooks = (1 << NF_INET_PRE_ROUTING) |
(1 << NF_INET_LOCAL_OUT),
.me = THIS_MODULE,
},
};
static int __init redirect_tg_init(void)
{
return xt_register_targets(redirect_tg_reg,
ARRAY_SIZE(redirect_tg_reg));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 12 | 60.00% | 1 | 33.33% |
| Jan Engelhardt | 8 | 40.00% | 2 | 66.67% |
| Total | 20 | 100.00% | 3 | 100.00% |
static void __exit redirect_tg_exit(void)
{
xt_unregister_targets(redirect_tg_reg, ARRAY_SIZE(redirect_tg_reg));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 11 | 57.89% | 1 | 33.33% |
| Jan Engelhardt | 8 | 42.11% | 2 | 66.67% |
| Total | 19 | 100.00% | 3 | 100.00% |
module_init(redirect_tg_init);
module_exit(redirect_tg_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
MODULE_DESCRIPTION("Xtables: Connection redirection to localhost");
MODULE_ALIAS("ip6t_REDIRECT");
MODULE_ALIAS("ipt_REDIRECT");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Engelhardt | 222 | 46.15% | 9 | 34.62% |
| Linus Torvalds (pre-git) | 138 | 28.69% | 1 | 3.85% |
| Florian Westphal | 53 | 11.02% | 1 | 3.85% |
| Patrick McHardy | 36 | 7.48% | 7 | 26.92% |
| Art Haas | 10 | 2.08% | 1 | 3.85% |
| Arturo Borrero Gonzalez | 10 | 2.08% | 2 | 7.69% |
| Pablo Neira Ayuso | 7 | 1.46% | 2 | 7.69% |
| Jozsef Kadlecsik | 2 | 0.42% | 1 | 3.85% |
| Herbert Xu | 2 | 0.42% | 1 | 3.85% |
| Harald Welte | 1 | 0.21% | 1 | 3.85% |
| Total | 481 | 100.00% | 26 | 100.00% |
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