nf_nat_proto_unknown.c

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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().
 */

/* (C) 1999-2001 Paul `Rusty' Russell
 * (C) 2002-2006 Netfilter Core Team <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/types.h>
#include <linux/init.h>

#include <linux/netfilter.h>
#include <net/netfilter/nf_nat.h>
#include <net/netfilter/nf_nat_l4proto.h>

static bool 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)
{
    return true;
}

static void 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)
{
    /* Sorry: we can't help you; if it's not unique, we can't frob
     * anything.
     */
    return;
}

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)
{
    return true;
}

const struct nf_nat_l4proto nf_nat_l4proto_unknown = {
    .manip_pkt      = unknown_manip_pkt,
    .in_range       = unknown_in_range,
    .unique_tuple       = unknown_unique_tuple,
};