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/* The "unknown" protocol.  This is what is used for protocols we

 * don't understand.  It's returned by ip_ct_find_proto().

 */

#include <linux/types.h>

#include <linux/init.h>

#include <linux/netfilter.h>

#include <linux/if.h>

#include <linux/netfilter_ipv4/ip_nat.h>

#include <linux/netfilter_ipv4/ip_nat_rule.h>

#include <linux/netfilter_ipv4/ip_nat_protocol.h>

static int unknown_in_range(const struct ip_conntrack_tuple *tuple,

                            enum ip_nat_manip_type manip_type,

                            const union ip_conntrack_manip_proto *min,

                            const union ip_conntrack_manip_proto *max)

{

        return 1;

}

static int unknown_unique_tuple(struct ip_conntrack_tuple *tuple,

                                const struct ip_nat_range *range,

                                enum ip_nat_manip_type maniptype,

                                const struct ip_conntrack *conntrack)

{

        /* Sorry: we can't help you; if it's not unique, we can't frob

           anything. */

        return 0;

}

static void

unknown_manip_pkt(struct iphdr *iph, size_t len,

                  const struct ip_conntrack_manip *manip,

                  enum ip_nat_manip_type maniptype)

{

        return;

}

static unsigned int

unknown_print(char *buffer,

              const struct ip_conntrack_tuple *match,

              const struct ip_conntrack_tuple *mask)

{

        return 0;

}

static unsigned int

unknown_print_range(char *buffer, const struct ip_nat_range *range)

{

        return 0;

}

struct ip_nat_protocol unknown_nat_protocol = {

        { NULL, NULL }, "unknown", 0,

        unknown_manip_pkt,

        unknown_in_range,

        unknown_unique_tuple,

        unknown_print,

        unknown_print_range

};