Release 4.16 net/ipv4/netfilter/iptable_filter.c
/*
* This is the 1999 rewrite of IP Firewalling, aiming for kernel 2.3.x.
*
* Copyright (C) 1999 Paul `Rusty' Russell & Michael J. Neuling
* Copyright (C) 2000-2004 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/moduleparam.h>
#include <linux/netfilter_ipv4/ip_tables.h>
#include <linux/slab.h>
#include <net/ip.h>
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>");
MODULE_DESCRIPTION("iptables filter table");
#define FILTER_VALID_HOOKS ((1 << NF_INET_LOCAL_IN) | \
(1 << NF_INET_FORWARD) | \
(1 << NF_INET_LOCAL_OUT))
static int __net_init iptable_filter_table_init(struct net *net);
static const struct xt_table packet_filter = {
.name = "filter",
.valid_hooks = FILTER_VALID_HOOKS,
.me = THIS_MODULE,
.af = NFPROTO_IPV4,
.priority = NF_IP_PRI_FILTER,
.table_init = iptable_filter_table_init,
};
static unsigned int
iptable_filter_hook(void *priv, struct sk_buff *skb,
const struct nf_hook_state *state)
{
return ipt_do_table(skb, state, state->net->ipv4.iptable_filter);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Engelhardt | 15 | 39.47% | 2 | 25.00% |
| Alexey Dobriyan | 12 | 31.58% | 1 | 12.50% |
| Eric W. Biedermann | 4 | 10.53% | 2 | 25.00% |
| David S. Miller | 3 | 7.89% | 1 | 12.50% |
| Linus Torvalds (pre-git) | 3 | 7.89% | 1 | 12.50% |
| Patrick McHardy | 1 | 2.63% | 1 | 12.50% |
| Total | 38 | 100.00% | 8 | 100.00% |
static struct nf_hook_ops *filter_ops __read_mostly;
/* Default to forward because I got too much mail already. */
static bool forward __read_mostly = true;
module_param(forward, bool, 0000);
static int __net_init iptable_filter_table_init(struct net *net)
{
struct ipt_replace *repl;
int err;
if (net->ipv4.iptable_filter)
return 0;
repl = ipt_alloc_initial_table(&packet_filter);
if (repl == NULL)
return -ENOMEM;
/* Entry 1 is the FORWARD hook */
((struct ipt_standard *)repl->entries)[1].target.verdict =
forward ? -NF_ACCEPT - 1 : -NF_DROP - 1;
err = ipt_register_table(net, &packet_filter, repl, filter_ops,
&net->ipv4.iptable_filter);
kfree(repl);
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jan Engelhardt | 51 | 46.79% | 1 | 20.00% |
| Florian Westphal | 26 | 23.85% | 2 | 40.00% |
| Alexey Dobriyan | 24 | 22.02% | 1 | 20.00% |
| Rusty Russell | 8 | 7.34% | 1 | 20.00% |
| Total | 109 | 100.00% | 5 | 100.00% |
static int __net_init iptable_filter_net_init(struct net *net)
{
if (net == &init_net || !forward)
return iptable_filter_table_init(net);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Florian Westphal | 31 | 100.00% | 1 | 100.00% |
| Total | 31 | 100.00% | 1 | 100.00% |
static void __net_exit iptable_filter_net_exit(struct net *net)
{
if (!net->ipv4.iptable_filter)
return;
ipt_unregister_table(net, net->ipv4.iptable_filter, filter_ops);
net->ipv4.iptable_filter = NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Alexey Dobriyan | 23 | 53.49% | 2 | 50.00% |
| Florian Westphal | 20 | 46.51% | 2 | 50.00% |
| Total | 43 | 100.00% | 4 | 100.00% |
static struct pernet_operations iptable_filter_net_ops = {
.init = iptable_filter_net_init,
.exit = iptable_filter_net_exit,
};
static int __init iptable_filter_init(void)
{
int ret;
filter_ops = xt_hook_ops_alloc(&packet_filter, iptable_filter_hook);
if (IS_ERR(filter_ops))
return PTR_ERR(filter_ops);
ret = register_pernet_subsys(&iptable_filter_net_ops);
if (ret < 0)
kfree(filter_ops);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 24 | 42.11% | 1 | 16.67% |
| Florian Westphal | 17 | 29.82% | 1 | 16.67% |
| Jan Engelhardt | 12 | 21.05% | 1 | 16.67% |
| Alexey Dobriyan | 2 | 3.51% | 1 | 16.67% |
| Patrick McHardy | 1 | 1.75% | 1 | 16.67% |
| Andrew Morton | 1 | 1.75% | 1 | 16.67% |
| Total | 57 | 100.00% | 6 | 100.00% |
static void __exit iptable_filter_fini(void)
{
unregister_pernet_subsys(&iptable_filter_net_ops);
kfree(filter_ops);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 14 | 70.00% | 1 | 25.00% |
| Florian Westphal | 4 | 20.00% | 1 | 25.00% |
| Jan Engelhardt | 1 | 5.00% | 1 | 25.00% |
| Andrew Morton | 1 | 5.00% | 1 | 25.00% |
| Total | 20 | 100.00% | 4 | 100.00% |
module_init(iptable_filter_init);
module_exit(iptable_filter_fini);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Florian Westphal | 115 | 26.56% | 2 | 6.25% |
| Jan Engelhardt | 89 | 20.55% | 7 | 21.88% |
| Linus Torvalds (pre-git) | 81 | 18.71% | 2 | 6.25% |
| Alexey Dobriyan | 79 | 18.24% | 3 | 9.38% |
| Harald Welte | 28 | 6.47% | 4 | 12.50% |
| Rusty Russell | 10 | 2.31% | 2 | 6.25% |
| Art Haas | 9 | 2.08% | 1 | 3.12% |
| Eric W. Biedermann | 4 | 0.92% | 2 | 6.25% |
| Patrick McHardy | 4 | 0.92% | 4 | 12.50% |
| Andrew Morton | 4 | 0.92% | 1 | 3.12% |
| David S. Miller | 3 | 0.69% | 1 | 3.12% |
| Tejun Heo | 3 | 0.69% | 1 | 3.12% |
| Arnaldo Carvalho de Melo | 3 | 0.69% | 1 | 3.12% |
| Linus Torvalds | 1 | 0.23% | 1 | 3.12% |
| Total | 433 | 100.00% | 32 | 100.00% |
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