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                 connman_info("PAC configuration %s", value);
 127
 128                 g_free(dhcp->element->ipv4.pac);
 129                 dhcp->element->ipv4.pac = g_strdup(value);
 130         }
 131 }
 132
 133 /**
 134  * connman_dhcp_bound:
 135  * @dhcp: DHCP structure
 136  *
 137  * Report successful bound of the interface
 138  */
 139 void connman_dhcp_bound(struct connman_dhcp *dhcp)
 140 {
 141         struct connman_element *element;
 142
 143         DBG("dhcp %p", dhcp);
 144
 145         element = connman_element_create(NULL);
 146         if (element == NULL)
 147                 return;
 148
 149         element->type = CONNMAN_ELEMENT_TYPE_IPV4;
 150         element->index = dhcp->index;
 151
 152         connman_element_update(dhcp->element);
 153
 154         if (connman_element_register(element, dhcp->element) < 0)
 155                 connman_element_unref(element);
 156 }
 157
 158 /**
 159  * connman_dhcp_renew:
 160  * @dhcp: DHCP structure
 161  *
 162  * Report successful renew of the interface
 163  */
 164 void connman_dhcp_renew(struct connman_dhcp *dhcp)
 165 {
 166         DBG("dhcp %p", dhcp);
 167
 168         connman_element_update(dhcp->element);
 169 }
 170
 171 /**
 172  * connman_dhcp_fail:
 173  * @dhcp: DHCP structure
 174  *
 175  * Report DHCP failure of the interface
 176  */
 177 void connman_dhcp_fail(struct connman_dhcp *dhcp)
 178 {
 179         DBG("dhcp %p", dhcp);
 180
 181         connman_element_set_error(dhcp->element,
 182                                         CONNMAN_ELEMENT_ERROR_FAILED);
 183 }
 184
 185 /**
 186  * connman_dhcp_get_data:
 187  * @dhcp: DHCP structure
 188  *
 189  * Get private DHCP data pointer
 190  */
 191 void *connman_dhcp_get_data(struct connman_dhcp *dhcp)
 192 {
 193         return dhcp->driver_data;
 194 }
 195
 196 /**
 197  * connman_dhcp_set_data:
 198  * @dhcp: DHCP structure
 199  * @data: data pointer
 200  *
 201  * Set private DHCP data pointer
 202  */
 203 void connman_dhcp_set_data(struct connman_dhcp *dhcp, void *data)
 204 {
 205         dhcp->driver_data = data;
 206 }
 207
 208 static GSList *driver_list = NULL;
 209
 210 static gint compare_priority(gconstpointer a, gconstpointer b)
 211 {
 212         const struct connman_dhcp_driver *driver1 = a;
 213         const struct connman_dhcp_driver *driver2 = b;
 214
 215         return driver2->priority - driver1->priority;
 216 }
 217
 218 /**
 219  * connman_dhcp_driver_register:
 220  * @driver: DHCP driver definition
 221  *
 222  * Register a new DHCP driver
 223  *
 224  * Returns: %0 on success
 225  */
 226 int connman_dhcp_driver_register(struct connman_dhcp_driver *driver)
 227 {
 228         DBG("driver %p name %s", driver, driver->name);
 229
 230         driver_list = g_slist_insert_sorted(driver_list, driver,
 231                                                         compare_priority);
 232
 233         return 0;
 234 }
 235
 236 /**
 237  * connman_dhcp_driver_unregister:
 238  * @driver: DHCP driver definition
 239  *
 240  * Remove a previously registered DHCP driver
 241  */
 242 void connman_dhcp_driver_unregister(struct connman_dhcp_driver *driver)
 243 {
 244         DBG("driver %p name %s", driver, driver->name);
 245
 246         driver_list = g_slist_remove(driver_list, driver);
 247 }
 248
 249 static int dhcp_probe(struct connman_element *element)
 250 {
 251         struct connman_dhcp *dhcp;
 252         GSList *list;
 253
 254         DBG("element %p name %s", element, element->name);
 255
 256         dhcp = g_try_new0(struct connman_dhcp, 1);
 257         if (dhcp == NULL)
 258                 return -ENOMEM;
 259
 260         dhcp->refcount = 1;
 261         dhcp->index = element->index;
 262         dhcp->state = CONNMAN_DHCP_STATE_IDLE;
 263
 264         dhcp->element = element;
 265
 266         connman_element_set_data(element, dhcp);
 267
 268         for (list = driver_list; list; list = list->next) {
 269                 struct connman_dhcp_driver *driver = list->data;
 270
 271                 DBG("driver %p name %s", driver, driver->name);
 272
 273                 if (driver->request(dhcp) == 0) {
 274                         dhcp->driver = driver;
 275                         break;
 276                 }
 277         }
 278
 279         if (dhcp->driver == NULL) {
 280                 connman_dhcp_unref(dhcp);
 281                 return -ENOENT;
 282         }
 283
 284         return 0;
 285 }
 286
 287 static void dhcp_remove(struct connman_element *element)
 288 {
 289         struct connman_dhcp *dhcp = connman_element_get_data(element);
 290
 291         DBG("element %p name %s", element, element->name);
 292
 293         connman_element_set_data(element, NULL);
 294
 295         if (dhcp->driver) {
 296                 dhcp->driver->release(dhcp);
 297                 dhcp->driver = NULL;
 298         }
 299
 300         connman_dhcp_unref(dhcp);
 301 }
 302
 303 static void dhcp_change(struct connman_element *element)
 304 {
 305         DBG("element %p name %s", element, element->name);
 306
 307         if (element->state == CONNMAN_ELEMENT_STATE_ERROR)
 308                 connman_element_set_error(element->parent,
 309                                         CONNMAN_ELEMENT_ERROR_DHCP_FAILED);
 310 }
 311
 312 static struct connman_driver dhcp_driver = {
 313         .name           = "dhcp",
 314         .type           = CONNMAN_ELEMENT_TYPE_DHCP,
 315         .priority       = CONNMAN_DRIVER_PRIORITY_LOW,
 316         .probe          = dhcp_probe,
 317         .remove         = dhcp_remove,
 318         .change         = dhcp_change,
 319 };
 320
 321 int __connman_dhcp_init(void)
 322 {
 323         return connman_driver_register(&dhcp_driver);
 324 }
 325
 326 void __connman_dhcp_cleanup(void)
 327 {
 328         connman_driver_unregister(&dhcp_driver);
 329 }