src/ipconfig.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2009  Intel Corporation. All rights reserved.
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License version 2 as
   9  *  published by the Free Software Foundation.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19  *
  20  */
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include "connman.h"
  27
  28 struct connman_ipconfig {
  29         gint refcount;
  30         enum connman_ipconfig_method method;
  31 };
  32
  33 /**
  34  * connman_ipconfig_create:
  35  *
  36  * Allocate a new ipconfig structure.
  37  *
  38  * Returns: a newly-allocated #connman_ipconfig structure
  39  */
  40 struct connman_ipconfig *connman_ipconfig_create(void)
  41 {
  42         struct connman_ipconfig *ipconfig;
  43
  44         DBG("");
  45
  46         ipconfig = g_try_new0(struct connman_ipconfig, 1);
  47         if (ipconfig == NULL)
  48                 return NULL;
  49
  50         DBG("ipconfig %p", ipconfig);
  51
  52         return ipconfig;
  53 }
  54
  55 /**
  56  * connman_ipconfig_ref:
  57  * @ipconfig: ipconfig structure
  58  *
  59  * Increase reference counter of ipconfig
  60  */
  61 struct connman_ipconfig *connman_ipconfig_ref(struct connman_ipconfig *ipconfig)
  62 {
  63         g_atomic_int_inc(&ipconfig->refcount);
  64
  65         return ipconfig;
  66 }
  67
  68 /**
  69  * connman_ipconfig_unref:
  70  * @ipconfig: ipconfig structure
  71  *
  72  * Decrease reference counter of ipconfig
  73  */
  74 void connman_ipconfig_unref(struct connman_ipconfig *ipconfig)
  75 {
  76         if (g_atomic_int_dec_and_test(&ipconfig->refcount) == TRUE) {
  77                 g_free(ipconfig);
  78         }
  79 }
  80
  81 static GSList *driver_list = NULL;
  82
  83 static gint compare_priority(gconstpointer a, gconstpointer b)
  84 {
  85         const struct connman_ipconfig_driver *driver1 = a;
  86         const struct connman_ipconfig_driver *driver2 = b;
  87
  88         return driver2->priority - driver1->priority;
  89 }
  90
  91 /**
  92  * connman_ipconfig_driver_register:
  93  * @driver: IP configuration driver
  94  *
  95  * Register a new IP configuration driver
  96  *
  97  * Returns: %0 on success
  98  */
  99 int connman_ipconfig_driver_register(struct connman_ipconfig_driver *driver)
 100 {
 101         DBG("driver %p name %s", driver, driver->name);
 102
 103         driver_list = g_slist_insert_sorted(driver_list, driver,
 104                                                         compare_priority);
 105
 106         return 0;
 107 }
 108
 109 /**
 110  * connman_ipconfig_driver_unregister:
 111  * @driver: IP configuration driver
 112  *
 113  * Remove a previously registered IP configuration driver.
 114  */
 115 void connman_ipconfig_driver_unregister(struct connman_ipconfig_driver *driver)
 116 {
 117         DBG("driver %p name %s", driver, driver->name);
 118
 119         driver_list = g_slist_remove(driver_list, driver);
 120 }