src/dhcp.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2013  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 #include <stdio.h>
  26 #include <errno.h>
  27 #include <string.h>
  28 #include <stdlib.h>
  29 #include <net/ethernet.h>
  30
  31 #ifndef IPV6_MIN_MTU
  32 #define IPV6_MIN_MTU 1280
  33 #endif
  34
  35 #include <connman/ipconfig.h>
  36 #include <include/setting.h>
  37
  38 #include <gdhcp/gdhcp.h>
  39
  40 #include <glib.h>
  41
  42 #include "connman.h"
  43
  44 #define RATE_LIMIT_INTERVAL     60      /* delay between successive attempts */
  45
  46 #if defined TIZEN_EXT
  47 #define DHCP_SUCCESS            "DHCP_SUCCESS"
  48 #endif
  49
  50 struct connman_dhcp {
  51         struct connman_ipconfig *ipconfig;
  52         struct connman_network *network;
  53         dhcp_cb callback;
  54         gpointer user_data;
  55
  56         char **nameservers;
  57         char **timeservers;
  58         char *pac;
  59
  60         unsigned int timeout;
  61
  62         GDHCPClient *ipv4ll_client;
  63         GDHCPClient *dhcp_client;
  64         char *ipv4ll_debug_prefix;
  65         char *dhcp_debug_prefix;
  66
  67         bool ipv4ll_running;
  68 };
  69
  70 static GHashTable *ipconfig_table;
  71
  72 static void dhcp_free(struct connman_dhcp *dhcp)
  73 {
  74 #if defined TIZEN_EXT
  75         DBG("dhcp_free [%p]", dhcp);
  76 #endif
  77         g_strfreev(dhcp->nameservers);
  78         g_strfreev(dhcp->timeservers);
  79         g_free(dhcp->pac);
  80
  81         dhcp->nameservers = NULL;
  82         dhcp->timeservers = NULL;
  83         dhcp->pac = NULL;
  84
  85         g_free(dhcp);
  86 #if defined TIZEN_EXT
  87         dhcp = NULL;
  88 #endif
  89 }
  90
  91 static void ipv4ll_stop_client(struct connman_dhcp *dhcp)
  92 {
  93 #if defined TIZEN_EXT
  94         DBG("dhcp [%p] ipv4ll_client [%p]", dhcp, dhcp->ipv4ll_client);
  95 #endif
  96         if (!dhcp->ipv4ll_client)
  97                 return;
  98
  99         g_dhcp_client_stop(dhcp->ipv4ll_client);
 100         g_dhcp_client_unref(dhcp->ipv4ll_client);
 101         dhcp->ipv4ll_client = NULL;
 102         dhcp->ipv4ll_running = false;
 103
 104         g_free(dhcp->ipv4ll_debug_prefix);
 105         dhcp->ipv4ll_debug_prefix = NULL;
 106 }
 107
 108 static bool apply_dhcp_invalidate_on_network(struct connman_dhcp *dhcp)
 109 {
 110         struct connman_service *service;
 111         int i;
 112
 113         if (!dhcp->network)
 114                 return true;
 115
 116         service = connman_service_lookup_from_network(dhcp->network);
 117         if (!service) {
 118                 connman_error("Can not lookup service");
 119                 return false;
 120         }
 121
 122         __connman_service_set_domainname(service, NULL);
 123         __connman_ipconfig_set_proxy_autoconfig(dhcp->ipconfig, NULL);
 124
 125         if (dhcp->timeservers) {
 126                 for (i = 0; dhcp->timeservers[i]; i++) {
 127                         __connman_service_timeserver_remove(service,
 128                                                         dhcp->timeservers[i]);
 129                 }
 130                 g_strfreev(dhcp->timeservers);
 131                 dhcp->timeservers = NULL;
 132         }
 133         if (dhcp->nameservers) {
 134                 for (i = 0; dhcp->nameservers[i]; i++) {
 135 #if defined TIZEN_EXT
 136                         __connman_service_nameserver_remove(service,
 137                                         dhcp->nameservers[i], false,
 138                                         CONNMAN_IPCONFIG_TYPE_IPV4);
 139 #else
 140                         __connman_service_nameserver_remove(service,
 141                                                 dhcp->nameservers[i], false);
 142 #endif
 143                 }
 144                 g_strfreev(dhcp->nameservers);
 145                 dhcp->nameservers = NULL;
 146         }
 147
 148         return true;
 149 }
 150
 151 /**
 152  * dhcp_invalidate: Invalidate an existing DHCP lease
 153  * @dhcp: pointer to the DHCP lease to invalidate.
 154  * @callback: flag indicating whether or not to invoke the client callback
 155  *            if present.
 156  *
 157  * Invalidates an existing DHCP lease, optionally invoking the client
 158  * callback. The caller may wish to avoid the client callback invocation
 159  * when the invocation of that callback might otherwise unnecessarily upset
 160  * service state due to the IP configuration change implied by this
 161  * invalidation.
 162  */
 163 static void dhcp_invalidate(struct connman_dhcp *dhcp, bool callback)
 164 {
 165         DBG("dhcp %p callback %u", dhcp, callback);
 166
 167         if (!dhcp)
 168                 return;
 169
 170         __connman_6to4_remove(dhcp->ipconfig);
 171
 172         if (!apply_dhcp_invalidate_on_network(dhcp))
 173                 return;
 174
 175         __connman_ipconfig_set_dhcp_address(dhcp->ipconfig,
 176                                 __connman_ipconfig_get_local(dhcp->ipconfig));
 177         DBG("last address %s",
 178                         __connman_ipconfig_get_dhcp_address(dhcp->ipconfig));
 179
 180         __connman_ipconfig_address_remove(dhcp->ipconfig);
 181
 182         __connman_ipconfig_set_local(dhcp->ipconfig, NULL);
 183         __connman_ipconfig_set_broadcast(dhcp->ipconfig, NULL);
 184         __connman_ipconfig_set_gateway(dhcp->ipconfig, NULL);
 185         __connman_ipconfig_set_prefixlen(dhcp->ipconfig, 0);
 186
 187         if (dhcp->callback && callback)
 188                 dhcp->callback(dhcp->ipconfig, dhcp->network,
 189                                                 false, dhcp->user_data);
 190 }
 191
 192 static void dhcp_valid(struct connman_dhcp *dhcp)
 193 {
 194         if (dhcp->callback)
 195                 dhcp->callback(dhcp->ipconfig, dhcp->network,
 196                                                 true, dhcp->user_data);
 197 }
 198
 199 static void dhcp_debug(const char *str, void *data)
 200 {
 201         connman_info("%s: %s", (const char *) data, str);
 202 }
 203
 204 static void ipv4ll_lost_cb(GDHCPClient *dhcp_client, gpointer user_data);
 205 static void ipv4ll_available_cb(GDHCPClient *ipv4ll_client, gpointer user_data);
 206
 207 static int ipv4ll_start_client(struct connman_dhcp *dhcp)
 208 {
 209         GDHCPClient *ipv4ll_client;
 210         GDHCPClientError error;
 211         const char *hostname;
 212         int index;
 213         int err;
 214
 215 #if defined TIZEN_EXT
 216         DBG("dhcp %p", dhcp);
 217 #endif
 218
 219         if (dhcp->ipv4ll_client)
 220                 return -EALREADY;
 221
 222         index = __connman_ipconfig_get_index(dhcp->ipconfig);
 223
 224         ipv4ll_client = g_dhcp_client_new(G_DHCP_IPV4LL, index, &error);
 225         if (error != G_DHCP_CLIENT_ERROR_NONE)
 226                 return -EINVAL;
 227
 228 #if !defined TIZEN_EXT
 229         if (getenv("CONNMAN_DHCP_DEBUG")) {
 230 #endif
 231                 dhcp->ipv4ll_debug_prefix = g_strdup_printf("IPv4LL index %d",
 232                                                         index);
 233                 g_dhcp_client_set_debug(ipv4ll_client, dhcp_debug,
 234                                         dhcp->ipv4ll_debug_prefix);
 235 #if !defined TIZEN_EXT
 236         }
 237 #endif
 238
 239         g_dhcp_client_set_id(ipv4ll_client);
 240
 241         if (dhcp->network) {
 242                 hostname = connman_utsname_get_hostname();
 243                 if (hostname)
 244                         g_dhcp_client_set_send(ipv4ll_client,
 245                                                 G_DHCP_HOST_NAME, hostname);
 246         }
 247
 248         g_dhcp_client_register_event(ipv4ll_client,
 249                         G_DHCP_CLIENT_EVENT_IPV4LL_LOST, ipv4ll_lost_cb, dhcp);
 250
 251         g_dhcp_client_register_event(ipv4ll_client,
 252                         G_DHCP_CLIENT_EVENT_IPV4LL_AVAILABLE,
 253                                                 ipv4ll_available_cb, dhcp);
 254
 255         dhcp->ipv4ll_client = ipv4ll_client;
 256
 257         err = g_dhcp_client_start(dhcp->ipv4ll_client, NULL);
 258         if (err < 0) {
 259                 ipv4ll_stop_client(dhcp);
 260                 return err;
 261         }
 262
 263         dhcp->ipv4ll_running = true;
 264         return 0;
 265 }
 266
 267 static gboolean dhcp_retry_cb(gpointer user_data)
 268 {
 269         struct connman_dhcp *dhcp = user_data;
 270
 271         dhcp->timeout = 0;
 272
 273 #if defined TIZEN_EXT
 274         DBG("dhcp %p", dhcp);
 275         DBG("dhcp->timeout %d", dhcp->timeout);
 276 #endif
 277         g_dhcp_client_start(dhcp->dhcp_client,
 278                         __connman_ipconfig_get_dhcp_address(dhcp->ipconfig));
 279
 280         return FALSE;
 281 }
 282
 283 static void no_lease_cb(GDHCPClient *dhcp_client, gpointer user_data)
 284 {
 285         struct connman_dhcp *dhcp = user_data;
 286         int err;
 287
 288         DBG("No lease available ipv4ll %d client %p", dhcp->ipv4ll_running,
 289                 dhcp->ipv4ll_client);
 290
 291 #if defined TIZEN_EXT
 292         if (dhcp->network &&
 293                         connman_network_get_bool(dhcp->network, "WiFi.RoamingDHCP")) {
 294
 295                 connman_network_set_bool(dhcp->network, "WiFi.RoamingDHCP", false);
 296                 __connman_network_enable_ipconfig(dhcp->network, dhcp->ipconfig);
 297                 __connman_network_notify_dhcp_changed("DHCP_FAIL",
 298                                         g_dhcp_client_get_interface(dhcp_client));
 299
 300                 return;
 301         }
 302
 303         if (connman_setting_get_bool("EnableAutoIp") == false) {
 304                 DBG("link-local address autoconfiguration is disabled.");
 305
 306                 if (dhcp->network) {
 307                         DBG("[DHCP-C] auto ip is not used, set dhcp-fail error and disconnect");
 308                         __connman_network_notify_dhcp_changed("DHCP_FAIL",
 309                                                 g_dhcp_client_get_interface(dhcp_client));
 310                         connman_network_set_error(dhcp->network, CONNMAN_NETWORK_ERROR_DHCP_FAIL);
 311                 }
 312                 return;
 313         }
 314 #endif
 315         if (dhcp->timeout > 0)
 316                 g_source_remove(dhcp->timeout);
 317
 318         dhcp->timeout = g_timeout_add_seconds(RATE_LIMIT_INTERVAL,
 319                                                 dhcp_retry_cb,
 320                                                 dhcp);
 321         if (dhcp->ipv4ll_running)
 322                 return;
 323
 324         err = ipv4ll_start_client(dhcp);
 325         if (err < 0)
 326                 DBG("Cannot start ipv4ll client (%d/%s)", err, strerror(-err));
 327
 328         /* Only notify upper layer if we have a problem */
 329         dhcp_invalidate(dhcp, !dhcp->ipv4ll_running);
 330 }
 331
 332 static void lease_lost_cb(GDHCPClient *dhcp_client, gpointer user_data)
 333 {
 334         struct connman_dhcp *dhcp = user_data;
 335
 336         DBG("Lease lost");
 337
 338         /* Upper layer will decide what to do, e.g. nothing or retry. */
 339         dhcp_invalidate(dhcp, true);
 340 }
 341
 342 static void ipv4ll_lost_cb(GDHCPClient *dhcp_client, gpointer user_data)
 343 {
 344         struct connman_dhcp *dhcp = user_data;
 345
 346         DBG("Lease lost");
 347
 348         ipv4ll_stop_client(dhcp);
 349
 350         /*
 351          * Since we lost our IPv4LL configuration we might as notify
 352          * the upper layers.
 353          */
 354         dhcp_invalidate(dhcp, true);
 355 }
 356
 357 static bool compare_string_arrays(char **array_a, char **array_b)
 358 {
 359         int i;
 360
 361         if (!array_a || !array_b)
 362                 return false;
 363
 364         if (g_strv_length(array_a) != g_strv_length(array_b))
 365                 return false;
 366
 367         for (i = 0; array_a[i] &&
 368                              array_b[i]; i++) {
 369                 if (g_strcmp0(array_a[i], array_b[i]) != 0)
 370                         return false;
 371         }
 372
 373         return true;
 374 }
 375
 376 static bool apply_lease_available_on_network(GDHCPClient *dhcp_client,
 377                                                 struct connman_dhcp *dhcp)
 378 {
 379         char **nameservers, **timeservers, *pac = NULL;
 380         struct connman_service *service;
 381         GList *list, *option = NULL;
 382         int ns_entries;
 383         int i;
 384
 385         if (!dhcp->network)
 386                 return true;
 387
 388         service = connman_service_lookup_from_network(dhcp->network);
 389         if (!service) {
 390                 connman_error("Can not lookup service");
 391                 return false;
 392         }
 393
 394         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_MTU);
 395         if (option && option->data) {
 396                 int mtu, index, err;
 397
 398                 mtu = atoi(option->data);
 399
 400                 if (mtu >= IPV6_MIN_MTU && mtu <= ETH_DATA_LEN) {
 401                         index = __connman_ipconfig_get_index(dhcp->ipconfig);
 402                         err = connman_inet_set_mtu(index, mtu);
 403
 404                         DBG("MTU %d index %d err %d", mtu, index, err);
 405                 }
 406         }
 407
 408         option = g_dhcp_client_get_option(dhcp_client, 252);
 409         if (option)
 410                 pac = g_strdup(option->data);
 411
 412         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_DNS_SERVER);
 413         ns_entries = g_list_length(option);
 414         nameservers = g_try_new0(char *, ns_entries + 1);
 415         if (nameservers) {
 416                 for (i = 0, list = option;list; list = list->next, i++)
 417                         nameservers[i] = g_strdup(list->data);
 418                 nameservers[ns_entries] = NULL;
 419         }
 420
 421         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_DOMAIN_NAME);
 422         if (option)
 423                 __connman_service_set_domainname(service, option->data);
 424
 425         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_HOST_NAME);
 426         if (option)
 427                 __connman_service_set_hostname(service, option->data);
 428
 429         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_NTP_SERVER);
 430         ns_entries = g_list_length(option);
 431         timeservers = g_try_new0(char *, ns_entries + 1);
 432         if (timeservers) {
 433                 for (i = 0, list = option; list; list = list->next, i++)
 434                         timeservers[i] = g_strdup(list->data);
 435                 timeservers[ns_entries] = NULL;
 436         }
 437
 438         if (!compare_string_arrays(nameservers, dhcp->nameservers)) {
 439                 if (dhcp->nameservers) {
 440 #if defined TIZEN_EXT
 441                         for (i = 0; dhcp->nameservers[i] != NULL; i++) {
 442                                 __connman_service_nameserver_remove(service,
 443                                                 dhcp->nameservers[i], false,
 444                                                 CONNMAN_IPCONFIG_TYPE_IPV4);
 445                         }
 446 #else
 447                         for (i = 0; dhcp->nameservers[i]; i++) {
 448                                 __connman_service_nameserver_remove(service,
 449                                                 dhcp->nameservers[i], false);
 450                         }
 451 #endif
 452                         g_strfreev(dhcp->nameservers);
 453                 }
 454
 455                 dhcp->nameservers = nameservers;
 456
 457                 for (i = 0; dhcp->nameservers && dhcp->nameservers[i]; i++) {
 458 #if defined TIZEN_EXT
 459                         __connman_service_nameserver_append(service,
 460                                                 dhcp->nameservers[i], false,
 461                                                 CONNMAN_IPCONFIG_TYPE_IPV4);
 462 #else
 463                         __connman_service_nameserver_append(service,
 464                                                 dhcp->nameservers[i], false);
 465 #endif
 466                 }
 467         } else {
 468                 g_strfreev(nameservers);
 469         }
 470
 471         if (!compare_string_arrays(timeservers, dhcp->timeservers)) {
 472                 if (dhcp->timeservers) {
 473                         for (i = 0; dhcp->timeservers[i]; i++) {
 474                                 __connman_service_timeserver_remove(service,
 475                                                         dhcp->timeservers[i]);
 476                         }
 477                         g_strfreev(dhcp->timeservers);
 478                 }
 479
 480                 dhcp->timeservers = timeservers;
 481
 482                 for (i = 0; dhcp->timeservers && dhcp->timeservers[i]; i++) {
 483                         __connman_service_timeserver_append(service,
 484                                                         dhcp->timeservers[i]);
 485                 }
 486         } else {
 487                 g_strfreev(timeservers);
 488         }
 489
 490         if (g_strcmp0(pac, dhcp->pac) != 0) {
 491                 g_free(dhcp->pac);
 492                 dhcp->pac = pac;
 493
 494                 __connman_ipconfig_set_proxy_autoconfig(dhcp->ipconfig,
 495                                                                 dhcp->pac);
 496         }
 497
 498         if (connman_setting_get_bool("Enable6to4"))
 499                 __connman_6to4_probe(service);
 500
 501         return true;
 502 }
 503
 504 static void lease_available_cb(GDHCPClient *dhcp_client, gpointer user_data)
 505 {
 506         struct connman_dhcp *dhcp = user_data;
 507         GList *option = NULL;
 508         enum connman_ipconfig_method old_method;
 509         char *address, *netmask = NULL, *gateway = NULL;
 510         const char *c_address, *c_gateway;
 511         unsigned char prefixlen, c_prefixlen;
 512         bool ip_change = false;
 513
 514         DBG("Lease available");
 515
 516         if (dhcp->ipv4ll_client) {
 517                 ipv4ll_stop_client(dhcp);
 518                 dhcp_invalidate(dhcp, false);
 519         }
 520
 521         c_address = __connman_ipconfig_get_local(dhcp->ipconfig);
 522         c_gateway = __connman_ipconfig_get_gateway(dhcp->ipconfig);
 523         c_prefixlen = __connman_ipconfig_get_prefixlen(dhcp->ipconfig);
 524
 525         address = g_dhcp_client_get_address(dhcp_client);
 526
 527         __connman_ipconfig_set_dhcp_address(dhcp->ipconfig, address);
 528         DBG("last address %s", address);
 529
 530 #if defined TIZEN_EXT
 531         int dhcp_lease_duration = g_dhcp_client_get_dhcp_lease_duration(dhcp_client);
 532 #endif
 533
 534         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_SUBNET);
 535         if (option)
 536                 netmask = g_strdup(option->data);
 537
 538         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_ROUTER);
 539         if (option)
 540                 gateway = g_strdup(option->data);
 541
 542         prefixlen = connman_ipaddress_calc_netmask_len(netmask);
 543         if (prefixlen == 255)
 544                 connman_warn("netmask: %s is invalid", netmask);
 545
 546         DBG("c_address %s", c_address);
 547
 548         if (g_strcmp0(address, c_address)) {
 549                 ip_change = true;
 550                 if (c_address) {
 551                         /* Remove old ip address */
 552                         __connman_ipconfig_address_remove(dhcp->ipconfig);
 553                 }
 554         }
 555         if (g_strcmp0(gateway, c_gateway)) {
 556                 ip_change = true;
 557                 if (c_gateway) {
 558                         /* Remove gateway ip address */
 559                         __connman_ipconfig_gateway_remove(dhcp->ipconfig);
 560                 }
 561         } else if (prefixlen != c_prefixlen)
 562                 ip_change = true;
 563
 564         old_method = __connman_ipconfig_get_method(dhcp->ipconfig);
 565         __connman_ipconfig_set_method(dhcp->ipconfig,
 566                                                 CONNMAN_IPCONFIG_METHOD_DHCP);
 567
 568 #if defined TIZEN_EXT
 569         __connman_ipconfig_set_dhcp_lease_duration(dhcp->ipconfig, dhcp_lease_duration);
 570         __connman_network_notify_dhcp_changed(DHCP_SUCCESS,
 571                                 g_dhcp_client_get_interface(dhcp_client));
 572 #endif
 573
 574         /*
 575          * Notify IPv4.Configuration's method moved back to DHCP.
 576          *
 577          * This is the case ConnMan initially set an address by using
 578          * IPv4LL because DHCP failed but now we got an address from DHCP.
 579          */
 580         if (old_method == CONNMAN_IPCONFIG_METHOD_AUTO) {
 581                 struct connman_service *service =
 582                         connman_service_lookup_from_network(dhcp->network);
 583
 584                 if (service)
 585                         __connman_service_notify_ipv4_configuration(service);
 586         }
 587
 588 #if defined TIZEN_EXT
 589         if (connman_network_get_bool(dhcp->network, "WiFi.RoamingDHCP")) {
 590
 591                 if (ip_change)
 592                         connman_service_notify_reconnection(
 593                                 connman_service_lookup_from_network(dhcp->network));
 594
 595                 connman_network_set_bool(dhcp->network, "WiFi.RoamingDHCP", false);
 596         }
 597 #endif
 598
 599         if (ip_change) {
 600                 __connman_ipconfig_set_local(dhcp->ipconfig, address);
 601                 __connman_ipconfig_set_prefixlen(dhcp->ipconfig, prefixlen);
 602                 __connman_ipconfig_set_gateway(dhcp->ipconfig, gateway);
 603         }
 604
 605         if (!apply_lease_available_on_network(dhcp_client, dhcp))
 606                 goto done;
 607
 608         if (ip_change)
 609                 dhcp_valid(dhcp);
 610
 611 done:
 612         g_free(address);
 613         g_free(netmask);
 614         g_free(gateway);
 615 }
 616
 617 static void ipv4ll_available_cb(GDHCPClient *ipv4ll_client, gpointer user_data)
 618 {
 619         struct connman_dhcp *dhcp = user_data;
 620         enum connman_ipconfig_method old_method;
 621         char *address, *netmask;
 622         unsigned char prefixlen;
 623
 624         DBG("IPV4LL available");
 625
 626         address = g_dhcp_client_get_address(ipv4ll_client);
 627         netmask = g_dhcp_client_get_netmask(ipv4ll_client);
 628
 629         prefixlen = connman_ipaddress_calc_netmask_len(netmask);
 630
 631         old_method = __connman_ipconfig_get_method(dhcp->ipconfig);
 632         __connman_ipconfig_set_method(dhcp->ipconfig,
 633                                                 CONNMAN_IPCONFIG_METHOD_AUTO);
 634
 635         /*
 636          * Notify IPv4.Configuration's method is AUTO now.
 637          *
 638          * This is the case DHCP failed thus ConnMan used IPv4LL to get an
 639          * address. Set IPv4.Configuration method to AUTO allows user to
 640          * ask for a DHCP address by setting the method again to DHCP.
 641          */
 642         if (old_method == CONNMAN_IPCONFIG_METHOD_DHCP) {
 643                 struct connman_service *service =
 644                         connman_service_lookup_from_network(dhcp->network);
 645
 646                 if (service)
 647                         __connman_service_notify_ipv4_configuration(service);
 648         }
 649
 650         __connman_ipconfig_set_local(dhcp->ipconfig, address);
 651         __connman_ipconfig_set_prefixlen(dhcp->ipconfig, prefixlen);
 652         __connman_ipconfig_set_gateway(dhcp->ipconfig, NULL);
 653
 654         dhcp_valid(dhcp);
 655
 656         g_free(address);
 657         g_free(netmask);
 658
 659 #if defined TIZEN_EXT
 660         __connman_network_notify_dhcp_changed("DHCP_FAIL",
 661                         g_dhcp_client_get_interface(ipv4ll_client));
 662 #endif
 663 }
 664
 665 static int dhcp_initialize(struct connman_dhcp *dhcp)
 666 {
 667         GDHCPClient *dhcp_client;
 668         GDHCPClientError error;
 669         int index;
 670         const char *vendor_class_id;
 671
 672         DBG("dhcp %p", dhcp);
 673
 674         index = __connman_ipconfig_get_index(dhcp->ipconfig);
 675
 676         dhcp_client = g_dhcp_client_new(G_DHCP_IPV4, index, &error);
 677         if (error != G_DHCP_CLIENT_ERROR_NONE)
 678 #if defined TIZEN_EXT
 679         {
 680                 DBG("failed g_dhcp_client_new(%d), index(%d)", error, index);
 681 #endif
 682                 return -EINVAL;
 683 #if defined TIZEN_EXT
 684         }
 685 #endif
 686
 687 #if !defined TIZEN_EXT
 688         if (getenv("CONNMAN_DHCP_DEBUG")) {
 689 #endif
 690                 dhcp->dhcp_debug_prefix = g_strdup_printf("DHCP index %d",
 691                                                         index);
 692                 g_dhcp_client_set_debug(dhcp_client, dhcp_debug,
 693                                         dhcp->dhcp_debug_prefix);
 694 #if !defined TIZEN_EXT
 695         }
 696 #endif
 697
 698         g_dhcp_client_set_id(dhcp_client);
 699
 700         if (dhcp->network) {
 701                 struct connman_service *service;
 702                 const char *hostname;
 703
 704                 service = connman_service_lookup_from_network(dhcp->network);
 705
 706                 hostname = __connman_service_get_hostname(service);
 707                 if (!hostname)
 708                         hostname = connman_utsname_get_hostname();
 709
 710                 if (hostname)
 711                         g_dhcp_client_set_send(dhcp_client,
 712                                                 G_DHCP_HOST_NAME, hostname);
 713
 714                 g_dhcp_client_set_request(dhcp_client, G_DHCP_HOST_NAME);
 715                 g_dhcp_client_set_request(dhcp_client, G_DHCP_DNS_SERVER);
 716                 g_dhcp_client_set_request(dhcp_client, G_DHCP_DOMAIN_NAME);
 717                 g_dhcp_client_set_request(dhcp_client, G_DHCP_NTP_SERVER);
 718                 g_dhcp_client_set_request(dhcp_client, 252);
 719                 g_dhcp_client_set_request(dhcp_client, G_DHCP_MTU);
 720         }
 721
 722         g_dhcp_client_set_request(dhcp_client, G_DHCP_ROUTER);
 723         g_dhcp_client_set_request(dhcp_client, G_DHCP_SUBNET);
 724
 725         vendor_class_id = connman_setting_get_string("VendorClassID");
 726         if (vendor_class_id)
 727                 g_dhcp_client_set_send(dhcp_client, G_DHCP_VENDOR_CLASS_ID,
 728                                         vendor_class_id);
 729
 730         g_dhcp_client_register_event(dhcp_client,
 731                         G_DHCP_CLIENT_EVENT_LEASE_AVAILABLE,
 732                                                 lease_available_cb, dhcp);
 733
 734         g_dhcp_client_register_event(dhcp_client,
 735                         G_DHCP_CLIENT_EVENT_LEASE_LOST, lease_lost_cb, dhcp);
 736
 737         g_dhcp_client_register_event(dhcp_client,
 738                         G_DHCP_CLIENT_EVENT_NO_LEASE, no_lease_cb, dhcp);
 739
 740         dhcp->dhcp_client = dhcp_client;
 741
 742         return 0;
 743 }
 744
 745 static int dhcp_release(struct connman_dhcp *dhcp)
 746 {
 747         DBG("dhcp %p", dhcp);
 748
 749         if (dhcp->timeout > 0) {
 750                 g_source_remove(dhcp->timeout);
 751                 dhcp->timeout = 0;
 752         }
 753
 754         if (dhcp->dhcp_client) {
 755                 g_dhcp_client_stop(dhcp->dhcp_client);
 756                 g_dhcp_client_unref(dhcp->dhcp_client);
 757         }
 758
 759         dhcp->dhcp_client = NULL;
 760
 761         g_free(dhcp->dhcp_debug_prefix);
 762         dhcp->dhcp_debug_prefix = NULL;
 763
 764         ipv4ll_stop_client(dhcp);
 765
 766         return 0;
 767 }
 768
 769 char *__connman_dhcp_get_server_address(struct connman_ipconfig *ipconfig)
 770 {
 771         struct connman_dhcp *dhcp;
 772
 773         dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
 774         if (!dhcp)
 775                 return NULL;
 776
 777         return g_dhcp_client_get_server_address(dhcp->dhcp_client);
 778 }
 779
 780 #if defined TIZEN_EXT_WIFI_MESH
 781 int __connman_mesh_dhcp_start(struct connman_ipconfig *ipconfig,
 782                         dhcp_cb callback, gpointer user_data)
 783 {
 784         struct connman_dhcp *dhcp;
 785         int err;
 786
 787         DBG("");
 788
 789         dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
 790         if (!dhcp) {
 791
 792                 dhcp = g_try_new0(struct connman_dhcp, 1);
 793                 if (!dhcp)
 794                         return -ENOMEM;
 795
 796                 dhcp->ipconfig = ipconfig;
 797                 __connman_ipconfig_ref(ipconfig);
 798
 799                 err = dhcp_initialize(dhcp);
 800
 801                 if (err < 0) {
 802                         g_free(dhcp);
 803                         return err;
 804                 }
 805
 806                 g_hash_table_insert(ipconfig_table, ipconfig, dhcp);
 807         }
 808
 809         dhcp->callback = callback;
 810         dhcp->user_data = user_data;
 811         return g_dhcp_client_start(dhcp->dhcp_client, NULL);
 812 }
 813 #endif
 814
 815 int __connman_dhcp_start(struct connman_ipconfig *ipconfig,
 816                         struct connman_network *network, dhcp_cb callback,
 817                         gpointer user_data)
 818 {
 819 #if !defined TIZEN_EXT
 820         const char *last_addr = NULL;
 821 #endif
 822         struct connman_dhcp *dhcp;
 823         int err;
 824
 825         DBG("");
 826
 827         if (network) {
 828                 struct connman_service *service;
 829
 830                 service = connman_service_lookup_from_network(network);
 831                 if (!service)
 832                         return -EINVAL;
 833         }
 834
 835 #if !defined TIZEN_EXT
 836         last_addr = __connman_ipconfig_get_dhcp_address(ipconfig);
 837 #endif
 838
 839         dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
 840         if (!dhcp) {
 841
 842                 dhcp = g_try_new0(struct connman_dhcp, 1);
 843                 if (!dhcp)
 844                         return -ENOMEM;
 845
 846                 dhcp->ipconfig = ipconfig;
 847                 __connman_ipconfig_ref(ipconfig);
 848
 849                 if (network) {
 850                         dhcp->network = network;
 851                         connman_network_ref(network);
 852                 }
 853
 854                 err = dhcp_initialize(dhcp);
 855
 856                 if (err < 0) {
 857                         if (network)
 858                                 connman_network_unref(network);
 859                         g_free(dhcp);
 860                         return err;
 861                 }
 862
 863                 g_hash_table_insert(ipconfig_table, ipconfig, dhcp);
 864         }
 865
 866         dhcp->callback = callback;
 867         dhcp->user_data = user_data;
 868
 869 #if defined TIZEN_EXT
 870         __connman_network_notify_dhcp_changed("DHCP_STARTED",
 871                         g_dhcp_client_get_interface(dhcp->dhcp_client));
 872
 873         if (network && connman_network_get_bool(network, "WiFi.RoamingDHCP")) {
 874                 const char *last_addr = __connman_ipconfig_get_dhcp_address(ipconfig);
 875
 876                 DBG("Start DHCP with last address request");
 877                 return g_dhcp_client_start(dhcp->dhcp_client, last_addr);
 878         } else {
 879                 DBG("Start DHCP with DHCPDISCOVER request");
 880                 return g_dhcp_client_start(dhcp->dhcp_client, NULL);
 881         }
 882 #else
 883         return g_dhcp_client_start(dhcp->dhcp_client, last_addr);
 884 #endif
 885 }
 886
 887 void __connman_dhcp_stop(struct connman_ipconfig *ipconfig)
 888 {
 889         struct connman_dhcp *dhcp;
 890
 891         DBG("ipconfig_table %p ipconfig %p", ipconfig_table, ipconfig);
 892
 893         if (!ipconfig_table)
 894                 return;
 895
 896         dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
 897         if (dhcp) {
 898                 g_hash_table_remove(ipconfig_table, ipconfig);
 899                 __connman_ipconfig_unref(ipconfig);
 900                 if (dhcp->network)
 901                         connman_network_unref(dhcp->network);
 902                 dhcp_release(dhcp);
 903                 dhcp_invalidate(dhcp, false);
 904                 dhcp_free(dhcp);
 905         }
 906 }
 907
 908 void __connman_dhcp_decline(struct connman_ipconfig *ipconfig)
 909 {
 910         struct connman_dhcp *dhcp;
 911         const char *address;
 912         struct in_addr addr;
 913
 914         DBG("ipconfig_table %p ipconfig %p", ipconfig_table, ipconfig);
 915
 916         if (!ipconfig_table)
 917                 return;
 918
 919         dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
 920         if (dhcp) {
 921                 address = __connman_ipconfig_get_local(ipconfig);
 922                 if (!address)
 923                         return;
 924
 925                 if (inet_pton(AF_INET, address, &addr) != 1)
 926                         connman_error("Could not convert address %s", address);
 927
 928                 g_dhcp_client_decline(dhcp->dhcp_client, htonl(addr.s_addr));
 929         }
 930 }
 931
 932 int __connman_dhcp_init(void)
 933 {
 934         DBG("");
 935
 936         ipconfig_table = g_hash_table_new_full(g_direct_hash, g_direct_equal,
 937                                                                 NULL, NULL);
 938
 939         return 0;
 940 }
 941
 942 void __connman_dhcp_cleanup(void)
 943 {
 944         DBG("");
 945
 946         g_hash_table_destroy(ipconfig_table);
 947         ipconfig_table = NULL;
 948 }