#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/netfilter_ipv6/ip6_tables.h>
+#include <linux/slab.h>
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>");
MODULE_DESCRIPTION("ip6tables filter table");
-#define FILTER_VALID_HOOKS ((1 << NF_IP6_LOCAL_IN) | (1 << NF_IP6_FORWARD) | (1 << NF_IP6_LOCAL_OUT))
+#define FILTER_VALID_HOOKS ((1 << NF_INET_LOCAL_IN) | \
+ (1 << NF_INET_FORWARD) | \
+ (1 << NF_INET_LOCAL_OUT))
-static struct
-{
- struct ip6t_replace repl;
- struct ip6t_standard entries[3];
- struct ip6t_error term;
-} initial_table __initdata = {
- .repl = {
- .name = "filter",
- .valid_hooks = FILTER_VALID_HOOKS,
- .num_entries = 4,
- .size = sizeof(struct ip6t_standard) * 3 + sizeof(struct ip6t_error),
- .hook_entry = {
- [NF_IP6_LOCAL_IN] = 0,
- [NF_IP6_FORWARD] = sizeof(struct ip6t_standard),
- [NF_IP6_LOCAL_OUT] = sizeof(struct ip6t_standard) * 2
- },
- .underflow = {
- [NF_IP6_LOCAL_IN] = 0,
- [NF_IP6_FORWARD] = sizeof(struct ip6t_standard),
- [NF_IP6_LOCAL_OUT] = sizeof(struct ip6t_standard) * 2
- },
- },
- .entries = {
- IP6T_STANDARD_INIT(NF_ACCEPT), /* LOCAL_IN */
- IP6T_STANDARD_INIT(NF_ACCEPT), /* FORWARD */
- IP6T_STANDARD_INIT(NF_ACCEPT), /* LOCAL_OUT */
- },
- .term = IP6T_ERROR_INIT, /* ERROR */
-};
-
-static struct xt_table packet_filter = {
+static const struct xt_table packet_filter = {
.name = "filter",
.valid_hooks = FILTER_VALID_HOOKS,
- .lock = RW_LOCK_UNLOCKED,
.me = THIS_MODULE,
- .af = AF_INET6,
+ .af = NFPROTO_IPV6,
+ .priority = NF_IP6_PRI_FILTER,
};
/* The work comes in here from netfilter.c. */
static unsigned int
-ip6t_hook(unsigned int hook,
- struct sk_buff *skb,
- const struct net_device *in,
- const struct net_device *out,
- int (*okfn)(struct sk_buff *))
-{
- return ip6t_do_table(skb, hook, in, out, &packet_filter);
-}
-
-static unsigned int
-ip6t_local_out_hook(unsigned int hook,
- struct sk_buff *skb,
- const struct net_device *in,
- const struct net_device *out,
- int (*okfn)(struct sk_buff *))
+ip6table_filter_hook(unsigned int hook, struct sk_buff *skb,
+ const struct net_device *in, const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
{
-#if 0
- /* root is playing with raw sockets. */
- if (skb->len < sizeof(struct iphdr)
- || ip_hdrlen(skb) < sizeof(struct iphdr)) {
- if (net_ratelimit())
- printk("ip6t_hook: happy cracking.\n");
- return NF_ACCEPT;
- }
-#endif
+ const struct net *net = dev_net((in != NULL) ? in : out);
- return ip6t_do_table(skb, hook, in, out, &packet_filter);
+ return ip6t_do_table(skb, hook, in, out, net->ipv6.ip6table_filter);
}
-static struct nf_hook_ops ip6t_ops[] = {
- {
- .hook = ip6t_hook,
- .owner = THIS_MODULE,
- .pf = PF_INET6,
- .hooknum = NF_IP6_LOCAL_IN,
- .priority = NF_IP6_PRI_FILTER,
- },
- {
- .hook = ip6t_hook,
- .owner = THIS_MODULE,
- .pf = PF_INET6,
- .hooknum = NF_IP6_FORWARD,
- .priority = NF_IP6_PRI_FILTER,
- },
- {
- .hook = ip6t_local_out_hook,
- .owner = THIS_MODULE,
- .pf = PF_INET6,
- .hooknum = NF_IP6_LOCAL_OUT,
- .priority = NF_IP6_PRI_FILTER,
- },
-};
+static struct nf_hook_ops *filter_ops __read_mostly;
/* Default to forward because I got too much mail already. */
static int forward = NF_ACCEPT;
module_param(forward, bool, 0000);
+static int __net_init ip6table_filter_net_init(struct net *net)
+{
+ struct ip6t_replace *repl;
+
+ repl = ip6t_alloc_initial_table(&packet_filter);
+ if (repl == NULL)
+ return -ENOMEM;
+ /* Entry 1 is the FORWARD hook */
+ ((struct ip6t_standard *)repl->entries)[1].target.verdict =
+ -forward - 1;
+
+ net->ipv6.ip6table_filter =
+ ip6t_register_table(net, &packet_filter, repl);
+ kfree(repl);
+ if (IS_ERR(net->ipv6.ip6table_filter))
+ return PTR_ERR(net->ipv6.ip6table_filter);
+ return 0;
+}
+
+static void __net_exit ip6table_filter_net_exit(struct net *net)
+{
+ ip6t_unregister_table(net, net->ipv6.ip6table_filter);
+}
+
+static struct pernet_operations ip6table_filter_net_ops = {
+ .init = ip6table_filter_net_init,
+ .exit = ip6table_filter_net_exit,
+};
+
static int __init ip6table_filter_init(void)
{
int ret;
return -EINVAL;
}
- /* Entry 1 is the FORWARD hook */
- initial_table.entries[1].target.verdict = -forward - 1;
-
- /* Register table */
- ret = ip6t_register_table(&packet_filter, &initial_table.repl);
+ ret = register_pernet_subsys(&ip6table_filter_net_ops);
if (ret < 0)
return ret;
/* Register hooks */
- ret = nf_register_hooks(ip6t_ops, ARRAY_SIZE(ip6t_ops));
- if (ret < 0)
+ filter_ops = xt_hook_link(&packet_filter, ip6table_filter_hook);
+ if (IS_ERR(filter_ops)) {
+ ret = PTR_ERR(filter_ops);
goto cleanup_table;
+ }
return ret;
cleanup_table:
- ip6t_unregister_table(&packet_filter);
+ unregister_pernet_subsys(&ip6table_filter_net_ops);
return ret;
}
static void __exit ip6table_filter_fini(void)
{
- nf_unregister_hooks(ip6t_ops, ARRAY_SIZE(ip6t_ops));
- ip6t_unregister_table(&packet_filter);
+ xt_hook_unlink(&packet_filter, filter_ops);
+ unregister_pernet_subsys(&ip6table_filter_net_ops);
}
module_init(ip6table_filter_init);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff