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/*
*
* Connection Manager
*
* Copyright (C) 2007-2009 Intel Corporation. All rights reserved.
*
* 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <glib.h>
#include "connman.h"
struct connman_dhcp {
gint refcount;
int index;
enum connman_dhcp_state state;
struct connman_element *element;
struct connman_dhcp_driver *driver;
void *driver_data;
};
/**
* connman_dhcp_ref:
* @dhcp: DHCP structure
*
* Increase reference counter of DHCP
*/
struct connman_dhcp *connman_dhcp_ref(struct connman_dhcp *dhcp)
{
g_atomic_int_inc(&dhcp->refcount);
return dhcp;
}
/**
* connman_dhcp_unref:
* @dhcp: DHCP structure
*
* Decrease reference counter of DHCP
*/
void connman_dhcp_unref(struct connman_dhcp *dhcp)
{
if (g_atomic_int_dec_and_test(&dhcp->refcount) == TRUE)
g_free(dhcp);
}
/**
* connman_dhcp_get_interface:
* @dhcp: DHCP structure
*
* Get network interface of DHCP
*/
char *connman_dhcp_get_interface(struct connman_dhcp *dhcp)
{
return connman_inet_ifname(dhcp->index);
}
/**
* connman_dhcp_bound:
* @dhcp: DHCP structure
*
* Report successful bound of the interface
*/
void connman_dhcp_bound(struct connman_dhcp *dhcp)
{
DBG("dhcp %p", dhcp);
}
static GSList *driver_list = NULL;
static gint compare_priority(gconstpointer a, gconstpointer b)
{
const struct connman_dhcp_driver *driver1 = a;
const struct connman_dhcp_driver *driver2 = b;
return driver2->priority - driver1->priority;
}
/**
* connman_dhcp_driver_register:
* @driver: DHCP driver definition
*
* Register a new DHCP driver
*
* Returns: %0 on success
*/
int connman_dhcp_driver_register(struct connman_dhcp_driver *driver)
{
DBG("driver %p name %s", driver, driver->name);
driver_list = g_slist_insert_sorted(driver_list, driver,
compare_priority);
return 0;
}
/**
* connman_dhcp_driver_unregister:
* @driver: DHCP driver definition
*
* Remove a previously registered DHCP driver
*/
void connman_dhcp_driver_unregister(struct connman_dhcp_driver *driver)
{
DBG("driver %p name %s", driver, driver->name);
driver_list = g_slist_remove(driver_list, driver);
}
static int dhcp_probe(struct connman_element *element)
{
struct connman_dhcp *dhcp;
GSList *list;
DBG("element %p name %s", element, element->name);
dhcp = g_try_new0(struct connman_dhcp, 1);
if (dhcp == NULL)
return -ENOMEM;
dhcp->refcount = 1;
dhcp->index = element->index;
dhcp->state = CONNMAN_DHCP_STATE_IDLE;
dhcp->element = element;
connman_element_set_data(element, dhcp);
for (list = driver_list; list; list = list->next) {
struct connman_dhcp_driver *driver = list->data;
DBG("driver %p name %s", driver, driver->name);
if (driver->request(dhcp) == 0) {
dhcp->driver = driver;
break;
}
}
if (dhcp->driver == NULL) {
connman_dhcp_unref(dhcp);
return -ENOENT;
}
return 0;
}
static void dhcp_remove(struct connman_element *element)
{
struct connman_dhcp *dhcp = connman_element_get_data(element);
DBG("element %p name %s", element, element->name);
connman_element_set_data(element, NULL);
if (dhcp->driver) {
dhcp->driver->release(dhcp);
dhcp->driver = NULL;
}
connman_dhcp_unref(dhcp);
}
static struct connman_driver dhcp_driver = {
.name = "dhcp",
.type = CONNMAN_ELEMENT_TYPE_DHCP,
.priority = CONNMAN_DRIVER_PRIORITY_LOW,
.probe = dhcp_probe,
.remove = dhcp_remove,
};
int __connman_dhcp_init(void)
{
return connman_driver_register(&dhcp_driver);
}
void __connman_dhcp_cleanup(void)
{
connman_driver_unregister(&dhcp_driver);
}
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