![Thomas Gleixner](/assets/img/avatar_default.png)
Based on 2 normalized pattern(s): 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 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 # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
109 lines
2.7 KiB
C
109 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* "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>
|
|
*/
|
|
#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)
|
|
{
|
|
return ipt_do_table(skb, state, state->net->ipv4.iptable_security);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
static void __exit iptable_security_fini(void)
|
|
{
|
|
unregister_pernet_subsys(&iptable_security_net_ops);
|
|
kfree(sectbl_ops);
|
|
}
|
|
|
|
module_init(iptable_security_init);
|
|
module_exit(iptable_security_fini);
|