src/dhcp.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2010  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                 g_free(dhcp->element->ipv4.timeserver);
 123                 dhcp->element->ipv4.timeserver = g_strdup(value);
 124         } else if (g_strcmp0(key, "MTU") == 0) {
 125         } else if (g_strcmp0(key, "PAC") == 0) {
 126                 g_free(dhcp->element->ipv4.pac);
 127                 dhcp->element->ipv4.pac = g_strdup(value);
 128         }
 129 }
 130
 131 /**
 132  * connman_dhcp_bound:
 133  * @dhcp: DHCP structure
 134  *
 135  * Report successful bound of the interface
 136  */
 137 void connman_dhcp_bound(struct connman_dhcp *dhcp)
 138 {
 139         struct connman_element *element;
 140
 141         DBG("dhcp %p", dhcp);
 142
 143         element = connman_element_create(NULL);
 144         if (element == NULL)
 145                 return;
 146
 147         element->type = CONNMAN_ELEMENT_TYPE_IPV4;
 148         element->index = dhcp->index;
 149
 150         connman_element_update(dhcp->element);
 151
 152         if (connman_element_register(element, dhcp->element) < 0)
 153                 connman_element_unref(element);
 154 }
 155
 156 /**
 157  * connman_dhcp_renew:
 158  * @dhcp: DHCP structure
 159  *
 160  * Report successful renew of the interface
 161  */
 162 void connman_dhcp_renew(struct connman_dhcp *dhcp)
 163 {
 164         DBG("dhcp %p", dhcp);
 165
 166         connman_element_update(dhcp->element);
 167 }
 168
 169 /**
 170  * connman_dhcp_fail:
 171  * @dhcp: DHCP structure
 172  *
 173  * Report DHCP failure of the interface
 174  */
 175 void connman_dhcp_fail(struct connman_dhcp *dhcp)
 176 {
 177         DBG("dhcp %p", dhcp);
 178
 179         connman_element_set_error(dhcp->element,
 180                                         CONNMAN_ELEMENT_ERROR_FAILED);
 181 }
 182
 183 /**
 184  * connman_dhcp_get_data:
 185  * @dhcp: DHCP structure
 186  *
 187  * Get private DHCP data pointer
 188  */
 189 void *connman_dhcp_get_data(struct connman_dhcp *dhcp)
 190 {
 191         return dhcp->driver_data;
 192 }
 193
 194 /**
 195  * connman_dhcp_set_data:
 196  * @dhcp: DHCP structure
 197  * @data: data pointer
 198  *
 199  * Set private DHCP data pointer
 200  */
 201 void connman_dhcp_set_data(struct connman_dhcp *dhcp, void *data)
 202 {
 203         dhcp->driver_data = data;
 204 }
 205
 206 static GSList *driver_list = NULL;
 207
 208 static gint compare_priority(gconstpointer a, gconstpointer b)
 209 {
 210         const struct connman_dhcp_driver *driver1 = a;
 211         const struct connman_dhcp_driver *driver2 = b;
 212
 213         return driver2->priority - driver1->priority;
 214 }
 215
 216 /**
 217  * connman_dhcp_driver_register:
 218  * @driver: DHCP driver definition
 219  *
 220  * Register a new DHCP driver
 221  *
 222  * Returns: %0 on success
 223  */
 224 int connman_dhcp_driver_register(struct connman_dhcp_driver *driver)
 225 {
 226         DBG("driver %p name %s", driver, driver->name);
 227
 228         driver_list = g_slist_insert_sorted(driver_list, driver,
 229                                                         compare_priority);
 230
 231         return 0;
 232 }
 233
 234 /**
 235  * connman_dhcp_driver_unregister:
 236  * @driver: DHCP driver definition
 237  *
 238  * Remove a previously registered DHCP driver
 239  */
 240 void connman_dhcp_driver_unregister(struct connman_dhcp_driver *driver)
 241 {
 242         DBG("driver %p name %s", driver, driver->name);
 243
 244         driver_list = g_slist_remove(driver_list, driver);
 245 }
 246
 247 static int dhcp_probe(struct connman_element *element)
 248 {
 249         struct connman_dhcp *dhcp;
 250         GSList *list;
 251
 252         DBG("element %p name %s", element, element->name);
 253
 254         dhcp = g_try_new0(struct connman_dhcp, 1);
 255         if (dhcp == NULL)
 256                 return -ENOMEM;
 257
 258         dhcp->refcount = 1;
 259         dhcp->index = element->index;
 260         dhcp->state = CONNMAN_DHCP_STATE_IDLE;
 261
 262         dhcp->element = element;
 263
 264         connman_element_set_data(element, dhcp);
 265
 266         for (list = driver_list; list; list = list->next) {
 267                 struct connman_dhcp_driver *driver = list->data;
 268
 269                 DBG("driver %p name %s", driver, driver->name);
 270
 271                 if (driver->request(dhcp) == 0) {
 272                         dhcp->driver = driver;
 273                         break;
 274                 }
 275         }
 276
 277         if (dhcp->driver == NULL) {
 278                 connman_dhcp_unref(dhcp);
 279                 return -ENOENT;
 280         }
 281
 282         return 0;
 283 }
 284
 285 static void dhcp_remove(struct connman_element *element)
 286 {
 287         struct connman_dhcp *dhcp = connman_element_get_data(element);
 288
 289         DBG("element %p name %s", element, element->name);
 290
 291         connman_element_set_data(element, NULL);
 292
 293         if (dhcp->driver) {
 294                 dhcp->driver->release(dhcp);
 295                 dhcp->driver = NULL;
 296         }
 297
 298         connman_dhcp_unref(dhcp);
 299 }
 300
 301 static void dhcp_change(struct connman_element *element)
 302 {
 303         DBG("element %p name %s", element, element->name);
 304
 305         if (element->state == CONNMAN_ELEMENT_STATE_ERROR)
 306                 connman_element_set_error(element->parent,
 307                                         CONNMAN_ELEMENT_ERROR_DHCP_FAILED);
 308 }
 309
 310 static struct connman_driver dhcp_driver = {
 311         .name           = "dhcp",
 312         .type           = CONNMAN_ELEMENT_TYPE_DHCP,
 313         .priority       = CONNMAN_DRIVER_PRIORITY_LOW,
 314         .probe          = dhcp_probe,
 315         .remove         = dhcp_remove,
 316         .change         = dhcp_change,
 317 };
 318
 319 int __connman_dhcp_init(void)
 320 {
 321         return connman_driver_register(&dhcp_driver);
 322 }
 323
 324 void __connman_dhcp_cleanup(void)
 325 {
 326         connman_driver_unregister(&dhcp_driver);
 327 }