mirror of
git://git.code.sf.net/p/xtables-addons/xtables-addons
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108 lines
2.6 KiB
C
108 lines
2.6 KiB
C
/*
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* rawpost table for ip6_tables
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* written by Jan Engelhardt <jengelh [at] medozas de>, 2008 - 2009
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* placed in the Public Domain
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*/
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#include <linux/module.h>
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#include <linux/netfilter_ipv6/ip6_tables.h>
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#include <net/ip.h>
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#include "compat_xtables.h"
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#include "compat_rawpost.h"
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enum {
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RAWPOST_VALID_HOOKS = 1 << NF_INET_POST_ROUTING,
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};
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static struct {
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struct ip6t_replace repl;
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struct ip6t_standard entries[1];
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struct ip6t_error term;
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} rawpost6_initial __initdata = {
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.repl = {
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.name = "rawpost",
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.valid_hooks = RAWPOST_VALID_HOOKS,
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.num_entries = 2,
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.size = sizeof(struct ip6t_standard) +
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sizeof(struct ip6t_error),
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.hook_entry = {
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[NF_INET_POST_ROUTING] = 0,
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},
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.underflow = {
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[NF_INET_POST_ROUTING] = 0,
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},
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},
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.entries = {
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IP6T_STANDARD_INIT(NF_ACCEPT), /* POST_ROUTING */
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},
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.term = IP6T_ERROR_INIT, /* ERROR */
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};
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static struct xt_table *rawpost6_ptable;
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static struct xt_table rawpost6_itable = {
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.name = "rawpost",
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.af = NFPROTO_IPV6,
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.valid_hooks = RAWPOST_VALID_HOOKS,
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.me = THIS_MODULE,
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};
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static unsigned int rawpost6_hook_fn(unsigned int hook, sk_buff_t *skb,
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const struct net_device *in, const struct net_device *out,
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int (*okfn)(struct sk_buff *))
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{
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19)
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return ip6t_do_table(skb, hook, in, out, rawpost6_ptable);
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#else
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return ip6t_do_table(skb, hook, in, out, rawpost6_ptable, NULL);
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#endif
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}
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static struct nf_hook_ops rawpost6_hook_ops __read_mostly = {
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.hook = rawpost6_hook_fn,
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.pf = NFPROTO_IPV6,
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.hooknum = NF_INET_POST_ROUTING,
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.priority = NF_IP6_PRI_LAST,
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.owner = THIS_MODULE,
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};
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static int __init rawpost6_table_init(void)
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{
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int ret;
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#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 29)
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rwlock_init(&rawpost6_itable.lock);
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#endif
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)
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rawpost6_ptable = ip6t_register_table(&init_net, &rawpost6_itable,
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&rawpost6_initial.repl);
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if (IS_ERR(rawpost6_ptable))
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return PTR_ERR(rawpost6_ptable);
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#else
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ret = ip6t_register_table(&rawpost6_itable, &rawpost6_initial.repl);
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if (ret < 0)
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return ret;
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rawpost6_ptable = &rawpost6_itable;
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#endif
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ret = nf_register_hook(&rawpost6_hook_ops);
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if (ret < 0)
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goto out;
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return ret;
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out:
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ip6t_unregister_table(rawpost6_ptable);
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return ret;
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}
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static void __exit rawpost6_table_exit(void)
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{
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nf_unregister_hook(&rawpost6_hook_ops);
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ip6t_unregister_table(rawpost6_ptable);
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}
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module_init(rawpost6_table_init);
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module_exit(rawpost6_table_exit);
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MODULE_AUTHOR("Jan Engelhardt <jengelh@medozas.de>");
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MODULE_LICENSE("GPL");
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