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
unknown_in_range(const struct nf_conntrack_tuple * tuple,enum nf_nat_manip_type manip_type,const union nf_conntrack_man_proto * min,const union nf_conntrack_man_proto * max)21 static 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
unknown_unique_tuple(struct nf_conntrack_tuple * tuple,const struct nf_nat_range * range,enum nf_nat_manip_type maniptype,const struct nf_conn * ct)29 static void 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;
37 }
38
39 static bool
unknown_manip_pkt(struct sk_buff * skb,unsigned int iphdroff,const struct nf_conntrack_tuple * tuple,enum nf_nat_manip_type maniptype)40 unknown_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
48 const 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