Contributors: 16
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Florian Westphal |
113 |
24.04% |
2 |
6.06% |
| Jan Engelhardt |
89 |
18.94% |
7 |
21.21% |
| Alexey Dobriyan |
81 |
17.23% |
3 |
9.09% |
| Linus Torvalds (pre-git) |
78 |
16.60% |
2 |
6.06% |
| David J. Wilder |
39 |
8.30% |
1 |
3.03% |
| Harald Welte |
27 |
5.74% |
3 |
9.09% |
| Rusty Russell |
10 |
2.13% |
2 |
6.06% |
| Art Haas |
9 |
1.91% |
1 |
3.03% |
| Patrick McHardy |
4 |
0.85% |
4 |
12.12% |
| Andrew Morton |
4 |
0.85% |
1 |
3.03% |
| Eric W. Biedermann |
4 |
0.85% |
2 |
6.06% |
| Arnaldo Carvalho de Melo |
3 |
0.64% |
1 |
3.03% |
| David S. Miller |
3 |
0.64% |
1 |
3.03% |
| Tejun Heo |
3 |
0.64% |
1 |
3.03% |
| Thomas Gleixner |
2 |
0.43% |
1 |
3.03% |
| Linus Torvalds |
1 |
0.21% |
1 |
3.03% |
| Total |
470 |
|
33 |
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* 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>
*/
#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);
}
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;
}
static int __net_init iptable_filter_net_init(struct net *net)
{
if (net == &init_net || !forward)
return iptable_filter_table_init(net);
return 0;
}
static void __net_exit iptable_filter_net_pre_exit(struct net *net)
{
if (net->ipv4.iptable_filter)
ipt_unregister_table_pre_exit(net, net->ipv4.iptable_filter,
filter_ops);
}
static void __net_exit iptable_filter_net_exit(struct net *net)
{
if (!net->ipv4.iptable_filter)
return;
ipt_unregister_table_exit(net, net->ipv4.iptable_filter);
net->ipv4.iptable_filter = NULL;
}
static struct pernet_operations iptable_filter_net_ops = {
.init = iptable_filter_net_init,
.pre_exit = iptable_filter_net_pre_exit,
.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;
}
static void __exit iptable_filter_fini(void)
{
unregister_pernet_subsys(&iptable_filter_net_ops);
kfree(filter_ops);
}
module_init(iptable_filter_init);
module_exit(iptable_filter_fini);