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Linux/net/netfilter/nf_nat_proto_unknown.c

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  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 
 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 
 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
 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 

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