Release 4.8 net/ipv4/netfilter/iptable_security.c
/*
* "security" table
*
* This is for use by Mandatory Access Control (MAC) security models,
* which need to be able to manage security policy in separate context
* to DAC.
*
* Based on iptable_mangle.c
*
* Copyright (C) 1999 Paul `Rusty' Russell & Michael J. Neuling
* Copyright (C) 2000-2004 Netfilter Core Team <coreteam <at> netfilter.org>
* Copyright (C) 2008 Red Hat, Inc., James Morris <jmorris <at> redhat.com>
*
* 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/netfilter_ipv4/ip_tables.h>
#include <linux/slab.h>
#include <net/ip.h>
MODULE_LICENSE("GPL");
MODULE_AUTHOR("James Morris <jmorris <at> redhat.com>");
MODULE_DESCRIPTION("iptables security table, for MAC rules");
#define SECURITY_VALID_HOOKS (1 << NF_INET_LOCAL_IN) | \
(1 << NF_INET_FORWARD) | \
(1 << NF_INET_LOCAL_OUT)
static int __net_init iptable_security_table_init(struct net *net);
static const struct xt_table security_table = {
.name = "security",
.valid_hooks = SECURITY_VALID_HOOKS,
.me = THIS_MODULE,
.af = NFPROTO_IPV4,
.priority = NF_IP_PRI_SECURITY,
.table_init = iptable_security_table_init,
};
static unsigned int
iptable_security_hook(void *priv, struct sk_buff *skb,
const struct nf_hook_state *state)
{
if (state->hook == NF_INET_LOCAL_OUT &&
(skb->len < sizeof(struct iphdr) ||
ip_hdrlen(skb) < sizeof(struct iphdr)))
/* Somebody is playing with raw sockets. */
return NF_ACCEPT;
return ipt_do_table(skb, state, state->net->ipv4.iptable_security);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| james morris | james morris | 39 | 53.42% | 1 | 12.50% |
| jan engelhardt | jan engelhardt | 23 | 31.51% | 2 | 25.00% |
| eric w. biederman | eric w. biederman | 6 | 8.22% | 3 | 37.50% |
| david s. miller | david s. miller | 3 | 4.11% | 1 | 12.50% |
| patrick mchardy | patrick mchardy | 2 | 2.74% | 1 | 12.50% |
| Total | 73 | 100.00% | 8 | 100.00% |
static struct nf_hook_ops *sectbl_ops __read_mostly;
static int __net_init iptable_security_table_init(struct net *net)
{
struct ipt_replace *repl;
int ret;
if (net->ipv4.iptable_security)
return 0;
repl = ipt_alloc_initial_table(&security_table);
if (repl == NULL)
return -ENOMEM;
ret = ipt_register_table(net, &security_table, repl, sectbl_ops,
&net->ipv4.iptable_security);
kfree(repl);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jan engelhardt | jan engelhardt | 28 | 35.90% | 1 | 25.00% |
| florian westphal | florian westphal | 26 | 33.33% | 2 | 50.00% |
| james morris | james morris | 24 | 30.77% | 1 | 25.00% |
| Total | 78 | 100.00% | 4 | 100.00% |
static void __net_exit iptable_security_net_exit(struct net *net)
{
if (!net->ipv4.iptable_security)
return;
ipt_unregister_table(net, net->ipv4.iptable_security, sectbl_ops);
net->ipv4.iptable_security = NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| james morris | james morris | 21 | 48.84% | 1 | 25.00% |
| florian westphal | florian westphal | 20 | 46.51% | 2 | 50.00% |
| alexey dobriyan | alexey dobriyan | 2 | 4.65% | 1 | 25.00% |
| Total | 43 | 100.00% | 4 | 100.00% |
static struct pernet_operations iptable_security_net_ops = {
.exit = iptable_security_net_exit,
};
static int __init iptable_security_init(void)
{
int ret;
sectbl_ops = xt_hook_ops_alloc(&security_table, iptable_security_hook);
if (IS_ERR(sectbl_ops))
return PTR_ERR(sectbl_ops);
ret = register_pernet_subsys(&iptable_security_net_ops);
if (ret < 0) {
kfree(sectbl_ops);
return ret;
}
ret = iptable_security_table_init(&init_net);
if (ret) {
unregister_pernet_subsys(&iptable_security_net_ops);
kfree(sectbl_ops);
}
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| james morris | james morris | 40 | 45.98% | 1 | 33.33% |
| florian westphal | florian westphal | 40 | 45.98% | 1 | 33.33% |
| jan engelhardt | jan engelhardt | 7 | 8.05% | 1 | 33.33% |
| Total | 87 | 100.00% | 3 | 100.00% |
static void __exit iptable_security_fini(void)
{
unregister_pernet_subsys(&iptable_security_net_ops);
kfree(sectbl_ops);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| james morris | james morris | 15 | 75.00% | 1 | 33.33% |
| florian westphal | florian westphal | 4 | 20.00% | 1 | 33.33% |
| jan engelhardt | jan engelhardt | 1 | 5.00% | 1 | 33.33% |
| Total | 20 | 100.00% | 3 | 100.00% |
module_init(iptable_security_init);
module_exit(iptable_security_fini);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| james morris | james morris | 221 | 53.77% | 1 | 6.25% |
| florian westphal | florian westphal | 106 | 25.79% | 2 | 12.50% |
| jan engelhardt | jan engelhardt | 68 | 16.55% | 6 | 37.50% |
| eric w. biederman | eric w. biederman | 6 | 1.46% | 3 | 18.75% |
| tejun heo | tejun heo | 3 | 0.73% | 1 | 6.25% |
| david s. miller | david s. miller | 3 | 0.73% | 1 | 6.25% |
| patrick mchardy | patrick mchardy | 2 | 0.49% | 1 | 6.25% |
| alexey dobriyan | alexey dobriyan | 2 | 0.49% | 1 | 6.25% |
| Total | 411 | 100.00% | 16 | 100.00% |
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