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         } else if (g_strcmp0(key, "Hostname") == 0) {
 119         } else if (g_strcmp0(key, "Timeserver") == 0) {
 120         } else if (g_strcmp0(key, "MTU") == 0) {
 121         }
 122 }
 123
 124 /**
 125  * connman_dhcp_bound:
 126  * @dhcp: DHCP structure
 127  *
 128  * Report successful bound of the interface
 129  */
 130 void connman_dhcp_bound(struct connman_dhcp *dhcp)
 131 {
 132         struct connman_element *element;
 133
 134         DBG("dhcp %p", dhcp);
 135
 136         element = connman_element_create(NULL);
 137         if (element == NULL)
 138                 return;
 139
 140         element->type = CONNMAN_ELEMENT_TYPE_IPV4;
 141         element->index = dhcp->index;
 142
 143         connman_element_update(dhcp->element);
 144
 145         if (connman_element_register(element, dhcp->element) < 0)
 146                 connman_element_unref(element);
 147 }
 148
 149 /**
 150  * connman_dhcp_renew:
 151  * @dhcp: DHCP structure
 152  *
 153  * Report successful renew of the interface
 154  */
 155 void connman_dhcp_renew(struct connman_dhcp *dhcp)
 156 {
 157         DBG("dhcp %p", dhcp);
 158
 159         connman_element_update(dhcp->element);
 160 }
 161
 162 /**
 163  * connman_dhcp_fail:
 164  * @dhcp: DHCP structure
 165  *
 166  * Report DHCP failure of the interface
 167  */
 168 void connman_dhcp_fail(struct connman_dhcp *dhcp)
 169 {
 170         DBG("dhcp %p", dhcp);
 171
 172         connman_element_set_error(dhcp->element,
 173                                         CONNMAN_ELEMENT_ERROR_FAILED);
 174 }
 175
 176 static GSList *driver_list = NULL;
 177
 178 static gint compare_priority(gconstpointer a, gconstpointer b)
 179 {
 180         const struct connman_dhcp_driver *driver1 = a;
 181         const struct connman_dhcp_driver *driver2 = b;
 182
 183         return driver2->priority - driver1->priority;
 184 }
 185
 186 /**
 187  * connman_dhcp_driver_register:
 188  * @driver: DHCP driver definition
 189  *
 190  * Register a new DHCP driver
 191  *
 192  * Returns: %0 on success
 193  */
 194 int connman_dhcp_driver_register(struct connman_dhcp_driver *driver)
 195 {
 196         DBG("driver %p name %s", driver, driver->name);
 197
 198         driver_list = g_slist_insert_sorted(driver_list, driver,
 199                                                         compare_priority);
 200
 201         return 0;
 202 }
 203
 204 /**
 205  * connman_dhcp_driver_unregister:
 206  * @driver: DHCP driver definition
 207  *
 208  * Remove a previously registered DHCP driver
 209  */
 210 void connman_dhcp_driver_unregister(struct connman_dhcp_driver *driver)
 211 {
 212         DBG("driver %p name %s", driver, driver->name);
 213
 214         driver_list = g_slist_remove(driver_list, driver);
 215 }
 216
 217 static int dhcp_probe(struct connman_element *element)
 218 {
 219         struct connman_dhcp *dhcp;
 220         GSList *list;
 221
 222         DBG("element %p name %s", element, element->name);
 223
 224         dhcp = g_try_new0(struct connman_dhcp, 1);
 225         if (dhcp == NULL)
 226                 return -ENOMEM;
 227
 228         dhcp->refcount = 1;
 229         dhcp->index = element->index;
 230         dhcp->state = CONNMAN_DHCP_STATE_IDLE;
 231
 232         dhcp->element = element;
 233
 234         connman_element_set_data(element, dhcp);
 235
 236         for (list = driver_list; list; list = list->next) {
 237                 struct connman_dhcp_driver *driver = list->data;
 238
 239                 DBG("driver %p name %s", driver, driver->name);
 240
 241                 if (driver->request(dhcp) == 0) {
 242                         dhcp->driver = driver;
 243                         break;
 244                 }
 245         }
 246
 247         if (dhcp->driver == NULL) {
 248                 connman_dhcp_unref(dhcp);
 249                 return -ENOENT;
 250         }
 251
 252         return 0;
 253 }
 254
 255 static void dhcp_remove(struct connman_element *element)
 256 {
 257         struct connman_dhcp *dhcp = connman_element_get_data(element);
 258
 259         DBG("element %p name %s", element, element->name);
 260
 261         connman_element_set_data(element, NULL);
 262
 263         if (dhcp->driver) {
 264                 dhcp->driver->release(dhcp);
 265                 dhcp->driver = NULL;
 266         }
 267
 268         connman_dhcp_unref(dhcp);
 269 }
 270
 271 static void dhcp_change(struct connman_element *element)
 272 {
 273         DBG("element %p name %s", element, element->name);
 274
 275         if (element->state == CONNMAN_ELEMENT_STATE_ERROR)
 276                 connman_element_set_error(element->parent,
 277                                         CONNMAN_ELEMENT_ERROR_DHCP_FAILED);
 278 }
 279
 280 static struct connman_driver dhcp_driver = {
 281         .name           = "dhcp",
 282         .type           = CONNMAN_ELEMENT_TYPE_DHCP,
 283         .priority       = CONNMAN_DRIVER_PRIORITY_LOW,
 284         .probe          = dhcp_probe,
 285         .remove         = dhcp_remove,
 286         .change         = dhcp_change,
 287 };
 288
 289 int __connman_dhcp_init(void)
 290 {
 291         return connman_driver_register(&dhcp_driver);
 292 }
 293
 294 void __connman_dhcp_cleanup(void)
 295 {
 296         connman_driver_unregister(&dhcp_driver);
 297 }