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