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                 int lease_time = 0;
 295
 296                 connman_network_set_bool(dhcp->network, "WiFi.RoamingDHCP", false);
 297                 __connman_network_enable_ipconfig(dhcp->network, dhcp->ipconfig);
 298                 __connman_network_notify_dhcp_changed("DHCP_FAIL", &lease_time);
 299
 300                 return;
 301         }
 302
 303         if (connman_setting_get_bool("EnableAutoIp") == false) {
 304                 DBG("link-local address autoconfiguration is disabled.");
 305                 if (dhcp->network) {
 306                         int lease_time = 0;
 307                         DBG("[DHCP-C] auto ip is not used, set dhcp-fail error and disconnect");
 308                         __connman_network_notify_dhcp_changed("DHCP_FAIL", &lease_time);
 309                         connman_network_set_error(dhcp->network, CONNMAN_NETWORK_ERROR_DHCP_FAIL);
 310                 }
 311                 return;
 312         }
 313 #endif
 314         if (dhcp->timeout > 0)
 315                 g_source_remove(dhcp->timeout);
 316
 317         dhcp->timeout = g_timeout_add_seconds(RATE_LIMIT_INTERVAL,
 318                                                 dhcp_retry_cb,
 319                                                 dhcp);
 320         if (dhcp->ipv4ll_running)
 321                 return;
 322
 323         err = ipv4ll_start_client(dhcp);
 324         if (err < 0)
 325                 DBG("Cannot start ipv4ll client (%d/%s)", err, strerror(-err));
 326
 327         /* Only notify upper layer if we have a problem */
 328         dhcp_invalidate(dhcp, !dhcp->ipv4ll_running);
 329 }
 330
 331 static void lease_lost_cb(GDHCPClient *dhcp_client, gpointer user_data)
 332 {
 333         struct connman_dhcp *dhcp = user_data;
 334
 335         DBG("Lease lost");
 336
 337         /* Upper layer will decide what to do, e.g. nothing or retry. */
 338         dhcp_invalidate(dhcp, true);
 339 }
 340
 341 static void ipv4ll_lost_cb(GDHCPClient *dhcp_client, gpointer user_data)
 342 {
 343         struct connman_dhcp *dhcp = user_data;
 344
 345         DBG("Lease lost");
 346
 347         ipv4ll_stop_client(dhcp);
 348
 349         /*
 350          * Since we lost our IPv4LL configuration we might as notify
 351          * the upper layers.
 352          */
 353         dhcp_invalidate(dhcp, true);
 354 }
 355
 356 static bool compare_string_arrays(char **array_a, char **array_b)
 357 {
 358         int i;
 359
 360         if (!array_a || !array_b)
 361                 return false;
 362
 363         if (g_strv_length(array_a) != g_strv_length(array_b))
 364                 return false;
 365
 366         for (i = 0; array_a[i] &&
 367                              array_b[i]; i++) {
 368                 if (g_strcmp0(array_a[i], array_b[i]) != 0)
 369                         return false;
 370         }
 371
 372         return true;
 373 }
 374
 375 static bool apply_lease_available_on_network(GDHCPClient *dhcp_client,
 376                                                 struct connman_dhcp *dhcp)
 377 {
 378         char **nameservers, **timeservers, *pac = NULL;
 379         struct connman_service *service;
 380         GList *list, *option = NULL;
 381         int ns_entries;
 382         int i;
 383
 384         if (!dhcp->network)
 385                 return true;
 386
 387         service = connman_service_lookup_from_network(dhcp->network);
 388         if (!service) {
 389                 connman_error("Can not lookup service");
 390                 return false;
 391         }
 392
 393         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_MTU);
 394         if (option && option->data) {
 395                 int mtu, index, err;
 396
 397                 mtu = atoi(option->data);
 398
 399                 if (mtu >= IPV6_MIN_MTU && mtu <= ETH_DATA_LEN) {
 400                         index = __connman_ipconfig_get_index(dhcp->ipconfig);
 401                         err = connman_inet_set_mtu(index, mtu);
 402
 403                         DBG("MTU %d index %d err %d", mtu, index, err);
 404                 }
 405         }
 406
 407         option = g_dhcp_client_get_option(dhcp_client, 252);
 408         if (option)
 409                 pac = g_strdup(option->data);
 410
 411         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_DNS_SERVER);
 412         ns_entries = g_list_length(option);
 413         nameservers = g_try_new0(char *, ns_entries + 1);
 414         if (nameservers) {
 415                 for (i = 0, list = option;list; list = list->next, i++)
 416                         nameservers[i] = g_strdup(list->data);
 417                 nameservers[ns_entries] = NULL;
 418         }
 419
 420         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_DOMAIN_NAME);
 421         if (option)
 422                 __connman_service_set_domainname(service, option->data);
 423
 424         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_HOST_NAME);
 425         if (option)
 426                 __connman_service_set_hostname(service, option->data);
 427
 428         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_NTP_SERVER);
 429         ns_entries = g_list_length(option);
 430         timeservers = g_try_new0(char *, ns_entries + 1);
 431         if (timeservers) {
 432                 for (i = 0, list = option; list; list = list->next, i++)
 433                         timeservers[i] = g_strdup(list->data);
 434                 timeservers[ns_entries] = NULL;
 435         }
 436
 437         if (!compare_string_arrays(nameservers, dhcp->nameservers)) {
 438                 if (dhcp->nameservers) {
 439 #if defined TIZEN_EXT
 440                         for (i = 0; dhcp->nameservers[i] != NULL; i++) {
 441                                 __connman_service_nameserver_remove(service,
 442                                                 dhcp->nameservers[i], false,
 443                                                 CONNMAN_IPCONFIG_TYPE_IPV4);
 444                         }
 445 #else
 446                         for (i = 0; dhcp->nameservers[i]; i++) {
 447                                 __connman_service_nameserver_remove(service,
 448                                                 dhcp->nameservers[i], false);
 449                         }
 450 #endif
 451                         g_strfreev(dhcp->nameservers);
 452                 }
 453
 454                 dhcp->nameservers = nameservers;
 455
 456                 for (i = 0; dhcp->nameservers && dhcp->nameservers[i]; i++) {
 457 #if defined TIZEN_EXT
 458                         __connman_service_nameserver_append(service,
 459                                                 dhcp->nameservers[i], false,
 460                                                 CONNMAN_IPCONFIG_TYPE_IPV4);
 461 #else
 462                         __connman_service_nameserver_append(service,
 463                                                 dhcp->nameservers[i], false);
 464 #endif
 465                 }
 466         } else {
 467                 g_strfreev(nameservers);
 468         }
 469
 470         if (!compare_string_arrays(timeservers, dhcp->timeservers)) {
 471                 if (dhcp->timeservers) {
 472                         for (i = 0; dhcp->timeservers[i]; i++) {
 473                                 __connman_service_timeserver_remove(service,
 474                                                         dhcp->timeservers[i]);
 475                         }
 476                         g_strfreev(dhcp->timeservers);
 477                 }
 478
 479                 dhcp->timeservers = timeservers;
 480
 481                 for (i = 0; dhcp->timeservers && dhcp->timeservers[i]; i++) {
 482                         __connman_service_timeserver_append(service,
 483                                                         dhcp->timeservers[i]);
 484                 }
 485         } else {
 486                 g_strfreev(timeservers);
 487         }
 488
 489         if (g_strcmp0(pac, dhcp->pac) != 0) {
 490                 g_free(dhcp->pac);
 491                 dhcp->pac = pac;
 492
 493                 __connman_ipconfig_set_proxy_autoconfig(dhcp->ipconfig,
 494                                                                 dhcp->pac);
 495         }
 496
 497         if (connman_setting_get_bool("Enable6to4"))
 498                 __connman_6to4_probe(service);
 499
 500         return true;
 501 }
 502
 503 static void lease_available_cb(GDHCPClient *dhcp_client, gpointer user_data)
 504 {
 505         struct connman_dhcp *dhcp = user_data;
 506         GList *option = NULL;
 507         enum connman_ipconfig_method old_method;
 508         char *address, *netmask = NULL, *gateway = NULL;
 509         const char *c_address, *c_gateway;
 510         unsigned char prefixlen, c_prefixlen;
 511         bool ip_change = false;
 512
 513         DBG("Lease available");
 514
 515         if (dhcp->ipv4ll_client) {
 516                 ipv4ll_stop_client(dhcp);
 517                 dhcp_invalidate(dhcp, false);
 518         }
 519
 520         c_address = __connman_ipconfig_get_local(dhcp->ipconfig);
 521         c_gateway = __connman_ipconfig_get_gateway(dhcp->ipconfig);
 522         c_prefixlen = __connman_ipconfig_get_prefixlen(dhcp->ipconfig);
 523
 524         address = g_dhcp_client_get_address(dhcp_client);
 525
 526         __connman_ipconfig_set_dhcp_address(dhcp->ipconfig, address);
 527         DBG("last address %s", address);
 528
 529 #if defined TIZEN_EXT
 530         int dhcp_lease_duration = g_dhcp_client_get_dhcp_lease_duration(dhcp_client);
 531 #endif
 532
 533         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_SUBNET);
 534         if (option)
 535                 netmask = g_strdup(option->data);
 536
 537         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_ROUTER);
 538         if (option)
 539                 gateway = g_strdup(option->data);
 540
 541         prefixlen = connman_ipaddress_calc_netmask_len(netmask);
 542         if (prefixlen == 255)
 543                 connman_warn("netmask: %s is invalid", netmask);
 544
 545         DBG("c_address %s", c_address);
 546
 547         if (g_strcmp0(address, c_address)) {
 548                 ip_change = true;
 549                 if (c_address) {
 550                         /* Remove old ip address */
 551                         __connman_ipconfig_address_remove(dhcp->ipconfig);
 552                 }
 553         }
 554         if (g_strcmp0(gateway, c_gateway)) {
 555                 ip_change = true;
 556                 if (c_gateway) {
 557                         /* Remove gateway ip address */
 558                         __connman_ipconfig_gateway_remove(dhcp->ipconfig);
 559                 }
 560         } else if (prefixlen != c_prefixlen)
 561                 ip_change = true;
 562
 563         old_method = __connman_ipconfig_get_method(dhcp->ipconfig);
 564         __connman_ipconfig_set_method(dhcp->ipconfig,
 565                                                 CONNMAN_IPCONFIG_METHOD_DHCP);
 566
 567 #if defined TIZEN_EXT
 568         __connman_ipconfig_set_dhcp_lease_duration(dhcp->ipconfig, dhcp_lease_duration);
 569         __connman_network_notify_dhcp_changed(DHCP_SUCCESS, &dhcp_lease_duration);
 570 #endif
 571
 572         /*
 573          * Notify IPv4.Configuration's method moved back to DHCP.
 574          *
 575          * This is the case ConnMan initially set an address by using
 576          * IPv4LL because DHCP failed but now we got an address from DHCP.
 577          */
 578         if (old_method == CONNMAN_IPCONFIG_METHOD_AUTO) {
 579                 struct connman_service *service =
 580                         connman_service_lookup_from_network(dhcp->network);
 581
 582                 if (service)
 583                         __connman_service_notify_ipv4_configuration(service);
 584         }
 585
 586 #if defined TIZEN_EXT
 587         if (connman_network_get_bool(dhcp->network, "WiFi.RoamingDHCP")) {
 588
 589                 if (ip_change)
 590                         connman_service_notify_reconnection(
 591                                 connman_service_lookup_from_network(dhcp->network));
 592
 593                 connman_network_set_bool(dhcp->network, "WiFi.RoamingDHCP", false);
 594         }
 595 #endif
 596
 597         if (ip_change) {
 598                 __connman_ipconfig_set_local(dhcp->ipconfig, address);
 599                 __connman_ipconfig_set_prefixlen(dhcp->ipconfig, prefixlen);
 600                 __connman_ipconfig_set_gateway(dhcp->ipconfig, gateway);
 601         }
 602
 603         if (!apply_lease_available_on_network(dhcp_client, dhcp))
 604                 goto done;
 605
 606         if (ip_change)
 607                 dhcp_valid(dhcp);
 608
 609 done:
 610         g_free(address);
 611         g_free(netmask);
 612         g_free(gateway);
 613 }
 614
 615 static void ipv4ll_available_cb(GDHCPClient *ipv4ll_client, gpointer user_data)
 616 {
 617         struct connman_dhcp *dhcp = user_data;
 618         enum connman_ipconfig_method old_method;
 619         char *address, *netmask;
 620         unsigned char prefixlen;
 621
 622         DBG("IPV4LL available");
 623
 624         address = g_dhcp_client_get_address(ipv4ll_client);
 625         netmask = g_dhcp_client_get_netmask(ipv4ll_client);
 626
 627         prefixlen = connman_ipaddress_calc_netmask_len(netmask);
 628
 629         old_method = __connman_ipconfig_get_method(dhcp->ipconfig);
 630         __connman_ipconfig_set_method(dhcp->ipconfig,
 631                                                 CONNMAN_IPCONFIG_METHOD_AUTO);
 632
 633         /*
 634          * Notify IPv4.Configuration's method is AUTO now.
 635          *
 636          * This is the case DHCP failed thus ConnMan used IPv4LL to get an
 637          * address. Set IPv4.Configuration method to AUTO allows user to
 638          * ask for a DHCP address by setting the method again to DHCP.
 639          */
 640         if (old_method == CONNMAN_IPCONFIG_METHOD_DHCP) {
 641                 struct connman_service *service =
 642                         connman_service_lookup_from_network(dhcp->network);
 643
 644                 if (service)
 645                         __connman_service_notify_ipv4_configuration(service);
 646         }
 647
 648         __connman_ipconfig_set_local(dhcp->ipconfig, address);
 649         __connman_ipconfig_set_prefixlen(dhcp->ipconfig, prefixlen);
 650         __connman_ipconfig_set_gateway(dhcp->ipconfig, NULL);
 651
 652         dhcp_valid(dhcp);
 653
 654         g_free(address);
 655         g_free(netmask);
 656 }
 657
 658 static int dhcp_initialize(struct connman_dhcp *dhcp)
 659 {
 660         GDHCPClient *dhcp_client;
 661         GDHCPClientError error;
 662         int index;
 663         const char *vendor_class_id;
 664
 665         DBG("dhcp %p", dhcp);
 666
 667         index = __connman_ipconfig_get_index(dhcp->ipconfig);
 668
 669         dhcp_client = g_dhcp_client_new(G_DHCP_IPV4, index, &error);
 670         if (error != G_DHCP_CLIENT_ERROR_NONE)
 671 #if defined TIZEN_EXT
 672         {
 673                 DBG("failed g_dhcp_client_new(%d), index(%d)", error, index);
 674 #endif
 675                 return -EINVAL;
 676 #if defined TIZEN_EXT
 677         }
 678 #endif
 679
 680 #if !defined TIZEN_EXT
 681         if (getenv("CONNMAN_DHCP_DEBUG")) {
 682 #endif
 683                 dhcp->dhcp_debug_prefix = g_strdup_printf("DHCP index %d",
 684                                                         index);
 685                 g_dhcp_client_set_debug(dhcp_client, dhcp_debug,
 686                                         dhcp->dhcp_debug_prefix);
 687 #if !defined TIZEN_EXT
 688         }
 689 #endif
 690
 691         g_dhcp_client_set_id(dhcp_client);
 692
 693         if (dhcp->network) {
 694                 struct connman_service *service;
 695                 const char *hostname;
 696
 697                 service = connman_service_lookup_from_network(dhcp->network);
 698
 699                 hostname = __connman_service_get_hostname(service);
 700                 if (!hostname)
 701                         hostname = connman_utsname_get_hostname();
 702
 703                 if (hostname)
 704                         g_dhcp_client_set_send(dhcp_client,
 705                                                 G_DHCP_HOST_NAME, hostname);
 706
 707                 g_dhcp_client_set_request(dhcp_client, G_DHCP_HOST_NAME);
 708                 g_dhcp_client_set_request(dhcp_client, G_DHCP_DNS_SERVER);
 709                 g_dhcp_client_set_request(dhcp_client, G_DHCP_DOMAIN_NAME);
 710                 g_dhcp_client_set_request(dhcp_client, G_DHCP_NTP_SERVER);
 711                 g_dhcp_client_set_request(dhcp_client, 252);
 712                 g_dhcp_client_set_request(dhcp_client, G_DHCP_MTU);
 713         }
 714
 715         g_dhcp_client_set_request(dhcp_client, G_DHCP_ROUTER);
 716         g_dhcp_client_set_request(dhcp_client, G_DHCP_SUBNET);
 717
 718         vendor_class_id = connman_setting_get_string("VendorClassID");
 719         if (vendor_class_id)
 720                 g_dhcp_client_set_send(dhcp_client, G_DHCP_VENDOR_CLASS_ID,
 721                                         vendor_class_id);
 722
 723         g_dhcp_client_register_event(dhcp_client,
 724                         G_DHCP_CLIENT_EVENT_LEASE_AVAILABLE,
 725                                                 lease_available_cb, dhcp);
 726
 727         g_dhcp_client_register_event(dhcp_client,
 728                         G_DHCP_CLIENT_EVENT_LEASE_LOST, lease_lost_cb, dhcp);
 729
 730         g_dhcp_client_register_event(dhcp_client,
 731                         G_DHCP_CLIENT_EVENT_NO_LEASE, no_lease_cb, dhcp);
 732
 733         dhcp->dhcp_client = dhcp_client;
 734
 735         return 0;
 736 }
 737
 738 static int dhcp_release(struct connman_dhcp *dhcp)
 739 {
 740         DBG("dhcp %p", dhcp);
 741
 742         if (dhcp->timeout > 0) {
 743                 g_source_remove(dhcp->timeout);
 744                 dhcp->timeout = 0;
 745         }
 746
 747         if (dhcp->dhcp_client) {
 748                 g_dhcp_client_stop(dhcp->dhcp_client);
 749                 g_dhcp_client_unref(dhcp->dhcp_client);
 750         }
 751
 752         dhcp->dhcp_client = NULL;
 753
 754         g_free(dhcp->dhcp_debug_prefix);
 755         dhcp->dhcp_debug_prefix = NULL;
 756
 757         ipv4ll_stop_client(dhcp);
 758
 759         return 0;
 760 }
 761
 762 char *__connman_dhcp_get_server_address(struct connman_ipconfig *ipconfig)
 763 {
 764         struct connman_dhcp *dhcp;
 765
 766         dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
 767         if (!dhcp)
 768                 return NULL;
 769
 770         return g_dhcp_client_get_server_address(dhcp->dhcp_client);
 771 }
 772
 773 #if defined TIZEN_EXT_WIFI_MESH
 774 int __connman_mesh_dhcp_start(struct connman_ipconfig *ipconfig,
 775                         dhcp_cb callback, gpointer user_data)
 776 {
 777         struct connman_dhcp *dhcp;
 778         int err;
 779
 780         DBG("");
 781
 782         dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
 783         if (!dhcp) {
 784
 785                 dhcp = g_try_new0(struct connman_dhcp, 1);
 786                 if (!dhcp)
 787                         return -ENOMEM;
 788
 789                 dhcp->ipconfig = ipconfig;
 790                 __connman_ipconfig_ref(ipconfig);
 791
 792                 err = dhcp_initialize(dhcp);
 793
 794                 if (err < 0) {
 795                         g_free(dhcp);
 796                         return err;
 797                 }
 798
 799                 g_hash_table_insert(ipconfig_table, ipconfig, dhcp);
 800         }
 801
 802         dhcp->callback = callback;
 803         dhcp->user_data = user_data;
 804         return g_dhcp_client_start(dhcp->dhcp_client, NULL);
 805 }
 806 #endif
 807
 808 int __connman_dhcp_start(struct connman_ipconfig *ipconfig,
 809                         struct connman_network *network, dhcp_cb callback,
 810                         gpointer user_data)
 811 {
 812 #if !defined TIZEN_EXT
 813         const char *last_addr = NULL;
 814 #endif
 815         struct connman_dhcp *dhcp;
 816         int err;
 817
 818         DBG("");
 819
 820         if (network) {
 821                 struct connman_service *service;
 822
 823                 service = connman_service_lookup_from_network(network);
 824                 if (!service)
 825                         return -EINVAL;
 826         }
 827
 828 #if !defined TIZEN_EXT
 829         last_addr = __connman_ipconfig_get_dhcp_address(ipconfig);
 830 #endif
 831
 832         dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
 833         if (!dhcp) {
 834
 835                 dhcp = g_try_new0(struct connman_dhcp, 1);
 836                 if (!dhcp)
 837                         return -ENOMEM;
 838
 839                 dhcp->ipconfig = ipconfig;
 840                 __connman_ipconfig_ref(ipconfig);
 841
 842                 if (network) {
 843                         dhcp->network = network;
 844                         connman_network_ref(network);
 845                 }
 846
 847                 err = dhcp_initialize(dhcp);
 848
 849                 if (err < 0) {
 850                         if (network)
 851                                 connman_network_unref(network);
 852                         g_free(dhcp);
 853                         return err;
 854                 }
 855
 856                 g_hash_table_insert(ipconfig_table, ipconfig, dhcp);
 857         }
 858
 859         dhcp->callback = callback;
 860         dhcp->user_data = user_data;
 861
 862 #if defined TIZEN_EXT
 863         if (network && connman_network_get_bool(network, "WiFi.RoamingDHCP")) {
 864                 const char *last_addr = __connman_ipconfig_get_dhcp_address(ipconfig);
 865
 866                 DBG("Start DHCP with last address request");
 867                 return g_dhcp_client_start(dhcp->dhcp_client, last_addr);
 868         } else {
 869                 DBG("Start DHCP with DHCPDISCOVER request");
 870                 return g_dhcp_client_start(dhcp->dhcp_client, NULL);
 871         }
 872 #else
 873         return g_dhcp_client_start(dhcp->dhcp_client, last_addr);
 874 #endif
 875 }
 876
 877 void __connman_dhcp_stop(struct connman_ipconfig *ipconfig)
 878 {
 879         struct connman_dhcp *dhcp;
 880
 881         DBG("ipconfig_table %p ipconfig %p", ipconfig_table, ipconfig);
 882
 883         if (!ipconfig_table)
 884                 return;
 885
 886         dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
 887         if (dhcp) {
 888                 g_hash_table_remove(ipconfig_table, ipconfig);
 889                 __connman_ipconfig_unref(ipconfig);
 890                 if (dhcp->network)
 891                         connman_network_unref(dhcp->network);
 892                 dhcp_release(dhcp);
 893                 dhcp_invalidate(dhcp, false);
 894                 dhcp_free(dhcp);
 895         }
 896 }
 897
 898 void __connman_dhcp_decline(struct connman_ipconfig *ipconfig)
 899 {
 900         struct connman_dhcp *dhcp;
 901         const char *address;
 902         struct in_addr addr;
 903
 904         DBG("ipconfig_table %p ipconfig %p", ipconfig_table, ipconfig);
 905
 906         if (!ipconfig_table)
 907                 return;
 908
 909         dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
 910         if (dhcp) {
 911                 address = __connman_ipconfig_get_local(ipconfig);
 912                 if (!address)
 913                         return;
 914
 915                 if (inet_pton(AF_INET, address, &addr) != 1)
 916                         connman_error("Could not convert address %s", address);
 917
 918                 g_dhcp_client_decline(dhcp->dhcp_client, htonl(addr.s_addr));
 919         }
 920 }
 921
 922 int __connman_dhcp_init(void)
 923 {
 924         DBG("");
 925
 926         ipconfig_table = g_hash_table_new_full(g_direct_hash, g_direct_equal,
 927                                                                 NULL, NULL);
 928
 929         return 0;
 930 }
 931
 932 void __connman_dhcp_cleanup(void)
 933 {
 934         DBG("");
 935
 936         g_hash_table_destroy(ipconfig_table);
 937         ipconfig_table = NULL;
 938 }