net/ipv4/netfilter/ip_conntrack_proto_generic.c

   1 /* (C) 1999-2001 Paul `Rusty' Russell
   2  * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8
   9 #include <linux/types.h>
  10 #include <linux/sched.h>
  11 #include <linux/timer.h>
  12 #include <linux/netfilter.h>
  13 #include <linux/netfilter_ipv4/ip_conntrack_protocol.h>
  14
  15 unsigned long ip_ct_generic_timeout = 600*HZ;
  16
  17 static int generic_pkt_to_tuple(const struct sk_buff *skb,
  18                                 unsigned int dataoff,
  19                                 struct ip_conntrack_tuple *tuple)
  20 {
  21         tuple->src.u.all = 0;
  22         tuple->dst.u.all = 0;
  23
  24         return 1;
  25 }
  26
  27 static int generic_invert_tuple(struct ip_conntrack_tuple *tuple,
  28                                 const struct ip_conntrack_tuple *orig)
  29 {
  30         tuple->src.u.all = 0;
  31         tuple->dst.u.all = 0;
  32
  33         return 1;
  34 }
  35
  36 /* Print out the per-protocol part of the tuple. */
  37 static int generic_print_tuple(struct seq_file *s,
  38                                const struct ip_conntrack_tuple *tuple)
  39 {
  40         return 0;
  41 }
  42
  43 /* Print out the private part of the conntrack. */
  44 static int generic_print_conntrack(struct seq_file *s,
  45                                    const struct ip_conntrack *state)
  46 {
  47         return 0;
  48 }
  49
  50 /* Returns verdict for packet, or -1 for invalid. */
  51 static int packet(struct ip_conntrack *conntrack,
  52                   const struct sk_buff *skb,
  53                   enum ip_conntrack_info ctinfo)
  54 {
  55         ip_ct_refresh_acct(conntrack, ctinfo, skb, ip_ct_generic_timeout);
  56         return NF_ACCEPT;
  57 }
  58
  59 /* Called when a new connection for this protocol found. */
  60 static int new(struct ip_conntrack *conntrack, const struct sk_buff *skb)
  61 {
  62         return 1;
  63 }
  64
  65 struct ip_conntrack_protocol ip_conntrack_generic_protocol =
  66 {
  67         .proto                  = 0,
  68         .name                   = "unknown",
  69         .pkt_to_tuple           = generic_pkt_to_tuple,
  70         .invert_tuple           = generic_invert_tuple,
  71         .print_tuple            = generic_print_tuple,
  72         .print_conntrack        = generic_print_conntrack,
  73         .packet                 = packet,
  74         .new                    = new,
  75 };