LXR linux/net/ipv4/netfilter/nf_nat_proto

   1/* The "unknown" protocol.  This is what is used for protocols we
   2 * don't understand.  It's returned by ip_ct_find_proto().
   3 */
   4
   5/* (C) 1999-2001 Paul `Rusty' Russell
   6 * (C) 2002-2006 Netfilter Core Team <coreteam@netfilter.org>
   7 *
   8 * This program is free software; you can redistribute it and/or modify
   9 * it under the terms of the GNU General Public License version 2 as
  10 * published by the Free Software Foundation.
  11 */
  12
  13#include <linux/types.h>
  14#include <linux/init.h>
  15
  16#include <linux/netfilter.h>
  17#include <net/netfilter/nf_nat.h>
  18#include <net/netfilter/nf_nat_rule.h>
  19#include <net/netfilter/nf_nat_protocol.h>
  20
  21static bool unknown_in_range(const struct nf_conntrack_tuple *tuple,
  22                             enum nf_nat_manip_type manip_type,
  23                             const union nf_conntrack_man_proto *min,
  24                             const union nf_conntrack_man_proto *max)
  25{
  26        return true;
  27}
  28
  29static bool unknown_unique_tuple(struct nf_conntrack_tuple *tuple,
  30                                 const struct nf_nat_range *range,
  31                                 enum nf_nat_manip_type maniptype,
  32                                 const struct nf_conn *ct)
  33{
  34        /* Sorry: we can't help you; if it's not unique, we can't frob
  35           anything. */
  36        return false;
  37}
  38
  39static bool
  40unknown_manip_pkt(struct sk_buff *skb,
  41                  unsigned int iphdroff,
  42                  const struct nf_conntrack_tuple *tuple,
  43                  enum nf_nat_manip_type maniptype)
  44{
  45        return true;
  46}
  47
  48const struct nf_nat_protocol nf_nat_unknown_protocol = {
  49        /* .me isn't set: getting a ref to this cannot fail. */
  50        .manip_pkt              = unknown_manip_pkt,
  51        .in_range               = unknown_in_range,
  52        .unique_tuple           = unknown_unique_tuple,
  53};
  54