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#include <linux/types.h>
6#include <linux/init.h>
7#include <linux/netfilter.h>
8#include <linux/if.h>
9
10#include <linux/netfilter_ipv4/ip_nat.h>
11#include <linux/netfilter_ipv4/ip_nat_rule.h>
12#include <linux/netfilter_ipv4/ip_nat_protocol.h>
13
14static int unknown_in_range(const struct ip_conntrack_tuple *tuple,
15			    enum ip_nat_manip_type manip_type,
16			    const union ip_conntrack_manip_proto *min,
17			    const union ip_conntrack_manip_proto *max)
18{
19	return 1;
20}
21
22static int unknown_unique_tuple(struct ip_conntrack_tuple *tuple,
23				const struct ip_nat_range *range,
24				enum ip_nat_manip_type maniptype,
25				const struct ip_conntrack *conntrack)
26{
27	/* Sorry: we can't help you; if it's not unique, we can't frob
28	   anything. */
29	return 0;
30}
31
32static void
33unknown_manip_pkt(struct iphdr *iph, size_t len,
34		  const struct ip_conntrack_manip *manip,
35		  enum ip_nat_manip_type maniptype)
36{
37	return;
38}
39
40static unsigned int
41unknown_print(char *buffer,
42	      const struct ip_conntrack_tuple *match,
43	      const struct ip_conntrack_tuple *mask)
44{
45	return 0;
46}
47
48static unsigned int
49unknown_print_range(char *buffer, const struct ip_nat_range *range)
50{
51	return 0;
52}
53
54struct ip_nat_protocol unknown_nat_protocol = {
55	{ NULL, NULL }, "unknown", 0,
56	unknown_manip_pkt,
57	unknown_in_range,
58	unknown_unique_tuple,
59	unknown_print,
60	unknown_print_range
61};
62