/*
  *  OpenVPN -- An application to securely tunnel IP networks
  *             over a single TCP/UDP port, with support for SSL/TLS-based
  *             session authentication and key exchange,
  *             packet encryption, packet authentication, and
  *             packet compression.
  *

  *  Copyright (C) 2002-2018 OpenVPN Inc <sales@openvpn.net>

  *
  *  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.
  *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *

  *  You should have received a copy of the GNU General Public License along
  *  with this program; if not, write to the Free Software Foundation, Inc.,
  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

  */
 

 #if !defined(CLINAT_H)

 #define CLINAT_H
 
 #include "buffer.h"
 
 #define MAX_CLIENT_NAT 64
 
 #define CN_OUTGOING 0
 #define CN_INCOMING 1
 
 struct client_nat_entry {

 #define CN_SNAT 0
 #define CN_DNAT 1
     int type;
     in_addr_t network;
     in_addr_t netmask;
     in_addr_t foreign_network;

 };
 
 struct client_nat_option_list {

     int n;
     struct client_nat_entry entries[MAX_CLIENT_NAT];

 };
 

 struct client_nat_option_list *new_client_nat_list(struct gc_arena *gc);
 
 struct client_nat_option_list *clone_client_nat_option_list(const struct client_nat_option_list *src, struct gc_arena *gc);
 
 void copy_client_nat_option_list(struct client_nat_option_list *dest, const struct client_nat_option_list *src);
 

 void print_client_nat_list(const struct client_nat_option_list *list, int msglevel);
 

 void add_client_nat_to_option_list(struct client_nat_option_list *dest,
                                    const char *type,
                                    const char *network,
                                    const char *netmask,
                                    const char *foreign_network,
                                    int msglevel);

 void client_nat_transform(const struct client_nat_option_list *list,
                           struct buffer *ipbuf,
                           const int direction);

 #endif /* if !defined(CLINAT_H) */