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_l4proto.h>
19
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)20 static bool unknown_in_range(const struct nf_conntrack_tuple *tuple,
21 enum nf_nat_manip_type manip_type,
22 const union nf_conntrack_man_proto *min,
23 const union nf_conntrack_man_proto *max)
24 {
25 return true;
26 }
27
unknown_unique_tuple(const struct nf_nat_l3proto * l3proto,struct nf_conntrack_tuple * tuple,const struct nf_nat_range * range,enum nf_nat_manip_type maniptype,const struct nf_conn * ct)28 static void unknown_unique_tuple(const struct nf_nat_l3proto *l3proto,
29 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 */
37 return;
38 }
39
40 static bool
unknown_manip_pkt(struct sk_buff * skb,const struct nf_nat_l3proto * l3proto,unsigned int iphdroff,unsigned int hdroff,const struct nf_conntrack_tuple * tuple,enum nf_nat_manip_type maniptype)41 unknown_manip_pkt(struct sk_buff *skb,
42 const struct nf_nat_l3proto *l3proto,
43 unsigned int iphdroff, unsigned int hdroff,
44 const struct nf_conntrack_tuple *tuple,
45 enum nf_nat_manip_type maniptype)
46 {
47 return true;
48 }
49
50 const struct nf_nat_l4proto nf_nat_l4proto_unknown = {
51 .manip_pkt = unknown_manip_pkt,
52 .in_range = unknown_in_range,
53 .unique_tuple = unknown_unique_tuple,
54 };
55