Release 4.14 net/netfilter/xt_state.c
/* Kernel module to match connection tracking information. */
/* (C) 1999-2001 Paul `Rusty' Russell
* (C) 2002-2005 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.
*/
#include <linux/module.h>
#include <linux/skbuff.h>
#include <net/netfilter/nf_conntrack.h>
#include <linux/netfilter/x_tables.h>
#include <linux/netfilter/xt_state.h>
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Rusty Russell <rusty@rustcorp.com.au>");
MODULE_DESCRIPTION("ip[6]_tables connection tracking state match module");
MODULE_ALIAS("ipt_state");
MODULE_ALIAS("ip6t_state");
static bool
state_mt(const struct sk_buff *skb, struct xt_action_param *par)
{
const struct xt_state_info *sinfo = par->matchinfo;
enum ip_conntrack_info ctinfo;
unsigned int statebit;
struct nf_conn *ct = nf_ct_get(skb, &ctinfo);
if (ct)
statebit = XT_STATE_BIT(ctinfo);
else if (ctinfo == IP_CT_UNTRACKED)
statebit = XT_STATE_UNTRACKED;
else
statebit = XT_STATE_INVALID;
return (sinfo->statemask & statebit);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 45 | 53.57% | 1 | 10.00% |
| Eric Dumazet | 14 | 16.67% | 1 | 10.00% |
| Florian Westphal | 9 | 10.71% | 1 | 10.00% |
| Harald Welte | 8 | 9.52% | 2 | 20.00% |
| Jan Engelhardt | 6 | 7.14% | 4 | 40.00% |
| Yasuyuki Kozakai | 2 | 2.38% | 1 | 10.00% |
| Total | 84 | 100.00% | 10 | 100.00% |
static int state_mt_check(const struct xt_mtchk_param *par)
{
int ret;
ret = nf_ct_netns_get(par->net, par->family);
if (ret < 0)
pr_info("cannot load conntrack support for proto=%u\n",
par->family);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 21 | 45.65% | 1 | 14.29% |
| Jan Engelhardt | 20 | 43.48% | 5 | 71.43% |
| Florian Westphal | 5 | 10.87% | 1 | 14.29% |
| Total | 46 | 100.00% | 7 | 100.00% |
static void state_mt_destroy(const struct xt_mtdtor_param *par)
{
nf_ct_netns_put(par->net, par->family);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pablo Neira Ayuso | 13 | 56.52% | 1 | 25.00% |
| Jan Engelhardt | 5 | 21.74% | 2 | 50.00% |
| Florian Westphal | 5 | 21.74% | 1 | 25.00% |
| Total | 23 | 100.00% | 4 | 100.00% |
static struct xt_match state_mt_reg __read_mostly = {
.name = "state",
.family = NFPROTO_UNSPEC,
.checkentry = state_mt_check,
.match = state_mt,
.destroy = state_mt_destroy,
.matchsize = sizeof(struct xt_state_info),
.me = THIS_MODULE,
};
static int __init state_mt_init(void)
{
return xt_register_match(&state_mt_reg);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 11 | 68.75% | 1 | 25.00% |
| Jan Engelhardt | 4 | 25.00% | 2 | 50.00% |
| Patrick McHardy | 1 | 6.25% | 1 | 25.00% |
| Total | 16 | 100.00% | 4 | 100.00% |
static void __exit state_mt_exit(void)
{
xt_unregister_match(&state_mt_reg);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 8 | 53.33% | 1 | 20.00% |
| Jan Engelhardt | 4 | 26.67% | 2 | 40.00% |
| Harald Welte | 2 | 13.33% | 1 | 20.00% |
| Patrick McHardy | 1 | 6.67% | 1 | 20.00% |
| Total | 15 | 100.00% | 5 | 100.00% |
module_init(state_mt_init);
module_exit(state_mt_exit);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 88 | 31.10% | 1 | 4.17% |
| Harald Welte | 57 | 20.14% | 4 | 16.67% |
| Jan Engelhardt | 46 | 16.25% | 10 | 41.67% |
| Pablo Neira Ayuso | 42 | 14.84% | 1 | 4.17% |
| Florian Westphal | 19 | 6.71% | 2 | 8.33% |
| Patrick McHardy | 15 | 5.30% | 4 | 16.67% |
| Eric Dumazet | 14 | 4.95% | 1 | 4.17% |
| Yasuyuki Kozakai | 2 | 0.71% | 1 | 4.17% |
| Total | 283 | 100.00% | 24 | 100.00% |
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