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