/*
  *  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.

  */
 
 #ifndef POOL_H
 #define POOL_H
 
 #if P2MP
 
 /*#define IFCONFIG_POOL_TEST*/
 
 #include "basic.h"
 #include "status.h"
 
 #define IFCONFIG_POOL_MAX         65536
 #define IFCONFIG_POOL_MIN_NETBITS    16
 

 enum pool_type
 {
     IFCONFIG_POOL_30NET,
     IFCONFIG_POOL_INDIV
 };

 
 struct ifconfig_pool_entry
 {

     bool in_use;
     char *common_name;
     time_t last_release;
     bool fixed;

 };
 
 struct ifconfig_pool
 {

     bool duplicate_cn;

     struct {

         enum pool_type type;

         in_addr_t base;
         int size;
     } ipv4;
     struct {
         bool enabled;
         struct in6_addr base;
         unsigned int size;
     } ipv6;

     struct ifconfig_pool_entry *list;

 };
 
 struct ifconfig_pool_persist
 {

     struct status_output *file;
     bool fixed;

 };
 
 typedef int ifconfig_pool_handle;
 

 struct ifconfig_pool *ifconfig_pool_init(enum pool_type type, in_addr_t start, in_addr_t end, const bool duplicate_cn, const bool ipv6_pool, const struct in6_addr ipv6_base, const int ipv6_netbits );

 void ifconfig_pool_free(struct ifconfig_pool *pool);

 bool ifconfig_pool_verify_range(const int msglevel, const in_addr_t start, const in_addr_t end);

 ifconfig_pool_handle ifconfig_pool_acquire(struct ifconfig_pool *pool, in_addr_t *local, in_addr_t *remote, struct in6_addr *remote_ipv6, const char *common_name);

 bool ifconfig_pool_release(struct ifconfig_pool *pool, ifconfig_pool_handle hand, const bool hard);

 struct ifconfig_pool_persist *ifconfig_pool_persist_init(const char *filename, int refresh_freq);

 void ifconfig_pool_persist_close(struct ifconfig_pool_persist *persist);
 
 bool ifconfig_pool_write_trigger(struct ifconfig_pool_persist *persist);
 
 void ifconfig_pool_read(struct ifconfig_pool_persist *persist, struct ifconfig_pool *pool);
 
 void ifconfig_pool_write(struct ifconfig_pool_persist *persist, const struct ifconfig_pool *pool);

 
 #ifdef IFCONFIG_POOL_TEST

 void ifconfig_pool_test(in_addr_t start, in_addr_t end);

 
 #endif

 
 #endif /* if P2MP */
 #endif /* ifndef POOL_H */