Release 4.8 net/ipv4/netfilter/ipt_MASQUERADE.c
/* Masquerade. Simple mapping which alters range to a local IP address
(depending on route). */
/* (C) 1999-2001 Paul `Rusty' Russell
* (C) 2002-2006 Netfilter Core Team <coreteam@netfilter.org>
*
* 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/types.h>
#include <linux/inetdevice.h>
#include <linux/ip.h>
#include <linux/timer.h>
#include <linux/module.h>
#include <linux/netfilter.h>
#include <net/protocol.h>
#include <net/ip.h>
#include <net/checksum.h>
#include <net/route.h>
#include <linux/netfilter_ipv4.h>
#include <linux/netfilter/x_tables.h>
#include <net/netfilter/nf_nat.h>
#include <net/netfilter/ipv4/nf_nat_masquerade.h>
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>");
MODULE_DESCRIPTION("Xtables: automatic-address SNAT");
/* FIXME: Multiple targets. --RR */
static int masquerade_tg_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 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 54 | 75.00% | 1 | 11.11% |
| jan engelhardt | jan engelhardt | 13 | 18.06% | 5 | 55.56% |
| patrick mchardy | patrick mchardy | 5 | 6.94% | 3 | 33.33% |
| Total | 72 | 100.00% | 9 | 100.00% |
static unsigned int
masquerade_tg(struct sk_buff *skb, const struct xt_action_param *par)
{
struct nf_nat_range range;
const struct nf_nat_ipv4_multi_range_compat *mr;
mr = par->targinfo;
range.flags = mr->range[0].flags;
range.min_proto = mr->range[0].min;
range.max_proto = mr->range[0].max;
return nf_nat_masquerade_ipv4(skb, par->hooknum, &range, par->out);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 52 | 57.78% | 2 | 15.38% |
| arturo borrero gonzalez | arturo borrero gonzalez | 12 | 13.33% | 1 | 7.69% |
| patrick mchardy | patrick mchardy | 12 | 13.33% | 2 | 15.38% |
| jan engelhardt | jan engelhardt | 5 | 5.56% | 3 | 23.08% |
| rusty russell | rusty russell | 4 | 4.44% | 1 | 7.69% |
| jozsef kadlecsik | jozsef kadlecsik | 2 | 2.22% | 1 | 7.69% |
| herbert xu | herbert xu | 1 | 1.11% | 1 | 7.69% |
| americo wang | americo wang | 1 | 1.11% | 1 | 7.69% |
| florian westphal | florian westphal | 1 | 1.11% | 1 | 7.69% |
| Total | 90 | 100.00% | 13 | 100.00% |
static struct xt_target masquerade_tg_reg __read_mostly = {
.name = "MASQUERADE",
.family = NFPROTO_IPV4,
.target = masquerade_tg,
.targetsize = sizeof(struct nf_nat_ipv4_multi_range_compat),
.table = "nat",
.hooks = 1 << NF_INET_POST_ROUTING,
.checkentry = masquerade_tg_check,
.me = THIS_MODULE,
};
static int __init masquerade_tg_init(void)
{
int ret;
ret = xt_register_target(&masquerade_tg_reg);
if (ret == 0)
nf_nat_masquerade_ipv4_register_notifier();
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 26 | 81.25% | 1 | 20.00% |
| jan engelhardt | jan engelhardt | 3 | 9.38% | 2 | 40.00% |
| arturo borrero gonzalez | arturo borrero gonzalez | 2 | 6.25% | 1 | 20.00% |
| phil oester | phil oester | 1 | 3.12% | 1 | 20.00% |
| Total | 32 | 100.00% | 5 | 100.00% |
static void __exit masquerade_tg_exit(void)
{
xt_unregister_target(&masquerade_tg_reg);
nf_nat_masquerade_ipv4_unregister_notifier();
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 12 | 66.67% | 1 | 20.00% |
| jan engelhardt | jan engelhardt | 3 | 16.67% | 2 | 40.00% |
| arturo borrero gonzalez | arturo borrero gonzalez | 2 | 11.11% | 1 | 20.00% |
| linus torvalds | linus torvalds | 1 | 5.56% | 1 | 20.00% |
| Total | 18 | 100.00% | 5 | 100.00% |
module_init(masquerade_tg_init);
module_exit(masquerade_tg_exit);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 191 | 55.69% | 2 | 6.45% |
| jan engelhardt | jan engelhardt | 43 | 12.54% | 10 | 32.26% |
| patrick mchardy | patrick mchardy | 42 | 12.24% | 7 | 22.58% |
| arturo borrero gonzalez | arturo borrero gonzalez | 19 | 5.54% | 1 | 3.23% |
| harald welte | harald welte | 14 | 4.08% | 1 | 3.23% |
| art haas | art haas | 13 | 3.79% | 1 | 3.23% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 9 | 2.62% | 2 | 6.45% |
| rusty russell | rusty russell | 4 | 1.17% | 1 | 3.23% |
| jozsef kadlecsik | jozsef kadlecsik | 3 | 0.87% | 1 | 3.23% |
| herbert xu | herbert xu | 1 | 0.29% | 1 | 3.23% |
| americo wang | americo wang | 1 | 0.29% | 1 | 3.23% |
| phil oester | phil oester | 1 | 0.29% | 1 | 3.23% |
| linus torvalds | linus torvalds | 1 | 0.29% | 1 | 3.23% |
| florian westphal | florian westphal | 1 | 0.29% | 1 | 3.23% |
| Total | 343 | 100.00% | 31 | 100.00% |
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