blob: fc9f6754028f2c4fc3fd5bb83ec1dca5225d4a74 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0-only
/*
* IPv6 raw table, a port of the IPv4 raw table to IPv6
*
* Copyright (C) 2003 Jozsef Kadlecsik <kadlec@netfilter.org>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/netfilter_ipv6/ip6_tables.h>
#include <linux/slab.h>
#define RAW_VALID_HOOKS ((1 << NF_INET_PRE_ROUTING) | (1 << NF_INET_LOCAL_OUT))
static bool raw_before_defrag __read_mostly;
MODULE_PARM_DESC(raw_before_defrag, "Enable raw table before defrag");
module_param(raw_before_defrag, bool, 0000);
static const struct xt_table packet_raw = {
.name = "raw",
.valid_hooks = RAW_VALID_HOOKS,
.me = THIS_MODULE,
.af = NFPROTO_IPV6,
.priority = NF_IP6_PRI_RAW,
};
static const struct xt_table packet_raw_before_defrag = {
.name = "raw",
.valid_hooks = RAW_VALID_HOOKS,
.me = THIS_MODULE,
.af = NFPROTO_IPV6,
.priority = NF_IP6_PRI_RAW_BEFORE_DEFRAG,
};
static struct nf_hook_ops *rawtable_ops __read_mostly;
static int ip6table_raw_table_init(struct net *net)
{
struct ip6t_replace *repl;
const struct xt_table *table = &packet_raw;
int ret;
if (raw_before_defrag)
table = &packet_raw_before_defrag;
repl = ip6t_alloc_initial_table(table);
if (repl == NULL)
return -ENOMEM;
ret = ip6t_register_table(net, table, repl, rawtable_ops);
kfree(repl);
return ret;
}
static void __net_exit ip6table_raw_net_pre_exit(struct net *net)
{
ip6t_unregister_table_pre_exit(net, "raw");
}
static void __net_exit ip6table_raw_net_exit(struct net *net)
{
ip6t_unregister_table_exit(net, "raw");
}
static struct pernet_operations ip6table_raw_net_ops = {
.pre_exit = ip6table_raw_net_pre_exit,
.exit = ip6table_raw_net_exit,
};
static int __init ip6table_raw_init(void)
{
const struct xt_table *table = &packet_raw;
int ret;
if (raw_before_defrag) {
table = &packet_raw_before_defrag;
pr_info("Enabling raw table before defrag\n");
}
ret = xt_register_template(table, ip6table_raw_table_init);
if (ret < 0)
return ret;
/* Register hooks */
rawtable_ops = xt_hook_ops_alloc(table, ip6t_do_table);
if (IS_ERR(rawtable_ops)) {
xt_unregister_template(table);
return PTR_ERR(rawtable_ops);
}
ret = register_pernet_subsys(&ip6table_raw_net_ops);
if (ret < 0) {
kfree(rawtable_ops);
xt_unregister_template(table);
return ret;
}
return ret;
}
static void __exit ip6table_raw_fini(void)
{
unregister_pernet_subsys(&ip6table_raw_net_ops);
xt_unregister_template(&packet_raw);
kfree(rawtable_ops);
}
module_init(ip6table_raw_init);
module_exit(ip6table_raw_fini);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Ip6tables legacy raw table");