src/dhcp.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 <glib.h>
  27
  28 #include "connman.h"
  29
  30 struct connman_dhcp {
  31         gint refcount;
  32         int index;
  33         enum connman_dhcp_state state;
  34
  35         struct connman_element *element;
  36
  37         struct connman_dhcp_driver *driver;
  38         void *driver_data;
  39 };
  40
  41 /**
  42  * connman_dhcp_ref:
  43  * @dhcp: DHCP structure
  44  *
  45  * Increase reference counter of DHCP
  46  */
  47 struct connman_dhcp *connman_dhcp_ref(struct connman_dhcp *dhcp)
  48 {
  49         g_atomic_int_inc(&dhcp->refcount);
  50
  51         return dhcp;
  52 }
  53
  54 /**
  55  * connman_dhcp_unref:
  56  * @dhcp: DHCP structure
  57  *
  58  * Decrease reference counter of DHCP
  59  */
  60 void connman_dhcp_unref(struct connman_dhcp *dhcp)
  61 {
  62         if (g_atomic_int_dec_and_test(&dhcp->refcount) == TRUE)
  63                 g_free(dhcp);
  64 }
  65
  66 /**
  67  * connman_dhcp_get_index:
  68  * @dhcp: DHCP structure
  69  *
  70  * Get network index of DHCP
  71  */
  72 int connman_dhcp_get_index(struct connman_dhcp *dhcp)
  73 {
  74         return dhcp->index;
  75 }
  76
  77 /**
  78  * connman_dhcp_get_interface:
  79  * @dhcp: DHCP structure
  80  *
  81  * Get network interface of DHCP
  82  */
  83 char *connman_dhcp_get_interface(struct connman_dhcp *dhcp)
  84 {
  85         return connman_inet_ifname(dhcp->index);
  86 }
  87
  88 /**
  89  * connman_dhcp_set_value:
  90  * @dhcp: DHCP structure
  91  * @key: unique identifier
  92  * @value: string value
  93  *
  94  * Set string value for specific key
  95  */
  96 void connman_dhcp_set_value(struct connman_dhcp *dhcp,
  97                                         const char *key, const char *value)
  98 {
  99         if (g_strcmp0(key, "Address") == 0) {
 100                 g_free(dhcp->element->ipv4.address);
 101                 dhcp->element->ipv4.address = g_strdup(value);
 102         } else if (g_strcmp0(key, "Netmask") == 0) {
 103                 g_free(dhcp->element->ipv4.netmask);
 104                 dhcp->element->ipv4.netmask = g_strdup(value);
 105         } else if (g_strcmp0(key, "Gateway") == 0) {
 106                 g_free(dhcp->element->ipv4.gateway);
 107                 dhcp->element->ipv4.gateway = g_strdup(value);
 108         } else if (g_strcmp0(key, "Network") == 0) {
 109                 g_free(dhcp->element->ipv4.network);
 110                 dhcp->element->ipv4.network = g_strdup(value);
 111         } else if (g_strcmp0(key, "Broadcast") == 0) {
 112                 g_free(dhcp->element->ipv4.broadcast);
 113                 dhcp->element->ipv4.broadcast = g_strdup(value);
 114         } else if (g_strcmp0(key, "Nameserver") == 0) {
 115                 g_free(dhcp->element->ipv4.nameserver);
 116                 dhcp->element->ipv4.nameserver = g_strdup(value);
 117         } else if (g_strcmp0(key, "Domainname") == 0) {
 118                 __connman_utsname_set_domainname(value);
 119         } else if (g_strcmp0(key, "Hostname") == 0) {
 120                 __connman_utsname_set_hostname(value);
 121         } else if (g_strcmp0(key, "Timeserver") == 0) {
 122         } else if (g_strcmp0(key, "MTU") == 0) {
 123         }
 124 }
 125
 126 /**
 127  * connman_dhcp_bound:
 128  * @dhcp: DHCP structure
 129  *
 130  * Report successful bound of the interface
 131  */
 132 void connman_dhcp_bound(struct connman_dhcp *dhcp)
 133 {
 134         struct connman_element *element;
 135
 136         DBG("dhcp %p", dhcp);
 137
 138         element = connman_element_create(NULL);
 139         if (element == NULL)
 140                 return;
 141
 142         element->type = CONNMAN_ELEMENT_TYPE_IPV4;
 143         element->index = dhcp->index;
 144
 145         connman_element_update(dhcp->element);
 146
 147         if (connman_element_register(element, dhcp->element) < 0)
 148                 connman_element_unref(element);
 149 }
 150
 151 /**
 152  * connman_dhcp_renew:
 153  * @dhcp: DHCP structure
 154  *
 155  * Report successful renew of the interface
 156  */
 157 void connman_dhcp_renew(struct connman_dhcp *dhcp)
 158 {
 159         DBG("dhcp %p", dhcp);
 160
 161         connman_element_update(dhcp->element);
 162 }
 163
 164 /**
 165  * connman_dhcp_fail:
 166  * @dhcp: DHCP structure
 167  *
 168  * Report DHCP failure of the interface
 169  */
 170 void connman_dhcp_fail(struct connman_dhcp *dhcp)
 171 {
 172         DBG("dhcp %p", dhcp);
 173
 174         connman_element_set_error(dhcp->element,
 175                                         CONNMAN_ELEMENT_ERROR_FAILED);
 176 }
 177
 178 static GSList *driver_list = NULL;
 179
 180 static gint compare_priority(gconstpointer a, gconstpointer b)
 181 {
 182         const struct connman_dhcp_driver *driver1 = a;
 183         const struct connman_dhcp_driver *driver2 = b;
 184
 185         return driver2->priority - driver1->priority;
 186 }
 187
 188 /**
 189  * connman_dhcp_driver_register:
 190  * @driver: DHCP driver definition
 191  *
 192  * Register a new DHCP driver
 193  *
 194  * Returns: %0 on success
 195  */
 196 int connman_dhcp_driver_register(struct connman_dhcp_driver *driver)
 197 {
 198         DBG("driver %p name %s", driver, driver->name);
 199
 200         driver_list = g_slist_insert_sorted(driver_list, driver,
 201                                                         compare_priority);
 202
 203         return 0;
 204 }
 205
 206 /**
 207  * connman_dhcp_driver_unregister:
 208  * @driver: DHCP driver definition
 209  *
 210  * Remove a previously registered DHCP driver
 211  */
 212 void connman_dhcp_driver_unregister(struct connman_dhcp_driver *driver)
 213 {
 214         DBG("driver %p name %s", driver, driver->name);
 215
 216         driver_list = g_slist_remove(driver_list, driver);
 217 }
 218
 219 static int dhcp_probe(struct connman_element *element)
 220 {
 221         struct connman_dhcp *dhcp;
 222         GSList *list;
 223
 224         DBG("element %p name %s", element, element->name);
 225
 226         dhcp = g_try_new0(struct connman_dhcp, 1);
 227         if (dhcp == NULL)
 228                 return -ENOMEM;
 229
 230         dhcp->refcount = 1;
 231         dhcp->index = element->index;
 232         dhcp->state = CONNMAN_DHCP_STATE_IDLE;
 233
 234         dhcp->element = element;
 235
 236         connman_element_set_data(element, dhcp);
 237
 238         for (list = driver_list; list; list = list->next) {
 239                 struct connman_dhcp_driver *driver = list->data;
 240
 241                 DBG("driver %p name %s", driver, driver->name);
 242
 243                 if (driver->request(dhcp) == 0) {
 244                         dhcp->driver = driver;
 245                         break;
 246                 }
 247         }
 248
 249         if (dhcp->driver == NULL) {
 250                 connman_dhcp_unref(dhcp);
 251                 return -ENOENT;
 252         }
 253
 254         return 0;
 255 }
 256
 257 static void dhcp_remove(struct connman_element *element)
 258 {
 259         struct connman_dhcp *dhcp = connman_element_get_data(element);
 260
 261         DBG("element %p name %s", element, element->name);
 262
 263         connman_element_set_data(element, NULL);
 264
 265         if (dhcp->driver) {
 266                 dhcp->driver->release(dhcp);
 267                 dhcp->driver = NULL;
 268         }
 269
 270         connman_dhcp_unref(dhcp);
 271 }
 272
 273 static void dhcp_change(struct connman_element *element)
 274 {
 275         DBG("element %p name %s", element, element->name);
 276
 277         if (element->state == CONNMAN_ELEMENT_STATE_ERROR)
 278                 connman_element_set_error(element->parent,
 279                                         CONNMAN_ELEMENT_ERROR_DHCP_FAILED);
 280 }
 281
 282 static struct connman_driver dhcp_driver = {
 283         .name           = "dhcp",
 284         .type           = CONNMAN_ELEMENT_TYPE_DHCP,
 285         .priority       = CONNMAN_DRIVER_PRIORITY_LOW,
 286         .probe          = dhcp_probe,
 287         .remove         = dhcp_remove,
 288         .change         = dhcp_change,
 289 };
 290
 291 int __connman_dhcp_init(void)
 292 {
 293         return connman_driver_register(&dhcp_driver);
 294 }
 295
 296 void __connman_dhcp_cleanup(void)
 297 {
 298         connman_driver_unregister(&dhcp_driver);
 299 }