LXR linux/net/netfilter/nf_conntrack

   1/*
   2 * (C) 2012 by Pablo Neira Ayuso <pablo@netfilter.org>
   3 * (C) 2012 by Vyatta Inc. <http://www.vyatta.com>
   4 *
   5 * This program is free software; you can redistribute it and/or modify
   6 * it under the terms of the GNU General Public License version 2 as
   7 * published by the Free Software Foundation (or any later at your option).
   8 */
   9
  10#include <linux/types.h>
  11#include <linux/netfilter.h>
  12#include <linux/skbuff.h>
  13#include <linux/vmalloc.h>
  14#include <linux/stddef.h>
  15#include <linux/err.h>
  16#include <linux/percpu.h>
  17#include <linux/kernel.h>
  18#include <linux/netdevice.h>
  19#include <linux/slab.h>
  20#include <linux/export.h>
  21
  22#include <net/netfilter/nf_conntrack.h>
  23#include <net/netfilter/nf_conntrack_core.h>
  24#include <net/netfilter/nf_conntrack_extend.h>
  25#include <net/netfilter/nf_conntrack_timeout.h>
  26
  27struct ctnl_timeout *
  28(*nf_ct_timeout_find_get_hook)(const char *name) __read_mostly;
  29EXPORT_SYMBOL_GPL(nf_ct_timeout_find_get_hook);
  30
  31void (*nf_ct_timeout_put_hook)(struct ctnl_timeout *timeout) __read_mostly;
  32EXPORT_SYMBOL_GPL(nf_ct_timeout_put_hook);
  33
  34static struct nf_ct_ext_type timeout_extend __read_mostly = {
  35        .len    = sizeof(struct nf_conn_timeout),
  36        .align  = __alignof__(struct nf_conn_timeout),
  37        .id     = NF_CT_EXT_TIMEOUT,
  38};
  39
  40int nf_conntrack_timeout_init(struct net *net)
  41{
  42        int ret = 0;
  43
  44        if (net_eq(net, &init_net)) {
  45                ret = nf_ct_extend_register(&timeout_extend);
  46                if (ret < 0) {
  47                        printk(KERN_ERR "nf_ct_timeout: Unable to register "
  48                                        "timeout extension.\n");
  49                        return ret;
  50                }
  51        }
  52
  53        return 0;
  54}
  55
  56void nf_conntrack_timeout_fini(struct net *net)
  57{
  58        if (net_eq(net, &init_net))
  59                nf_ct_extend_unregister(&timeout_extend);
  60}
  61