src/libstrongswan/networking/tun_device_manager.c

   1 /*
   2  * Copyright (C) 2023 Andreas Steffen
   3  *
   4  * Copyright (C) secunet Security Networks AG
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2 of the License, or (at your
   9  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  13  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * for more details.
  15  */
  16
  17 #include "tun_device_manager.h"
  18
  19 #include <utils/debug.h>
  20
  21 typedef struct private_tun_device_manager_t private_tun_device_manager_t;
  22
  23 /**
  24  * private data of tun_device_manager
  25  */
  26 struct private_tun_device_manager_t {
  27
  28         /**
  29          * public functions
  30          */
  31         tun_device_manager_t public;
  32
  33         /**
  34          * constructor function to create tun_device instances
  35          */
  36         tun_device_constructor_t constructor;
  37 };
  38
  39 METHOD(tun_device_manager_t, add_tun_device, void,
  40         private_tun_device_manager_t *this, tun_device_constructor_t constructor)
  41 {
  42         if (!this->constructor)
  43         {
  44                 this->constructor = constructor;
  45         }
  46 }
  47
  48 METHOD(tun_device_manager_t, remove_tun_device, void,
  49         private_tun_device_manager_t *this, tun_device_constructor_t constructor)
  50 {
  51         if (this->constructor == constructor)
  52         {
  53                 this->constructor = NULL;
  54         }
  55 }
  56
  57 METHOD(tun_device_manager_t, create, tun_device_t*,
  58         private_tun_device_manager_t *this, const char *name_tmpl)
  59 {
  60         if (this->constructor)
  61         {
  62                 return this->constructor(name_tmpl);
  63         }
  64         else
  65         {
  66                 return tun_device_create(name_tmpl);
  67         }
  68 }
  69
  70 METHOD(tun_device_manager_t, destroy, void,
  71         private_tun_device_manager_t *this)
  72 {
  73         free(this);
  74 }
  75
  76 /*
  77  * See header
  78  */
  79 tun_device_manager_t *tun_device_manager_create()
  80 {
  81         private_tun_device_manager_t *this;
  82
  83         INIT(this,
  84                         .public = {
  85                                 .add_tun_device = _add_tun_device,
  86                                 .remove_tun_device = _remove_tun_device,
  87                                 .create = _create,
  88                                 .destroy = _destroy,
  89                         },
  90         );
  91
  92         return &this->public;
  93 }