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 defined TIZEN_EXT
 288         if (connman_setting_get_bool("EnableAutoIp") == false) {
 289                 DBG("link-local address autoconfiguration is disabled.");
 290                 if (dhcp->network)
 291                         __connman_network_disconnect(dhcp->network);
 292                 return;
 293         }
 294 #endif
 295         if (dhcp->timeout > 0)
 296                 g_source_remove(dhcp->timeout);
 297
 298         dhcp->timeout = g_timeout_add_seconds(RATE_LIMIT_INTERVAL,
 299                                                 dhcp_retry_cb,
 300                                                 dhcp);
 301         if (dhcp->ipv4ll_running)
 302                 return;
 303
 304         err = ipv4ll_start_client(dhcp);
 305         if (err < 0)
 306                 DBG("Cannot start ipv4ll client (%d/%s)", err, strerror(-err));
 307
 308         /* Only notify upper layer if we have a problem */
 309         dhcp_invalidate(dhcp, !dhcp->ipv4ll_running);
 310 }
 311
 312 static void lease_lost_cb(GDHCPClient *dhcp_client, gpointer user_data)
 313 {
 314         struct connman_dhcp *dhcp = user_data;
 315
 316         DBG("Lease lost");
 317
 318         /* Upper layer will decide what to do, e.g. nothing or retry. */
 319         dhcp_invalidate(dhcp, true);
 320 }
 321
 322 static void ipv4ll_lost_cb(GDHCPClient *dhcp_client, gpointer user_data)
 323 {
 324         struct connman_dhcp *dhcp = user_data;
 325
 326         DBG("Lease lost");
 327
 328         ipv4ll_stop_client(dhcp);
 329
 330         /*
 331          * Since we lost our IPv4LL configuration we might as notify
 332          * the upper layers.
 333          */
 334         dhcp_invalidate(dhcp, true);
 335 }
 336
 337 static bool compare_string_arrays(char **array_a, char **array_b)
 338 {
 339         int i;
 340
 341         if (!array_a || !array_b)
 342                 return false;
 343
 344         if (g_strv_length(array_a) != g_strv_length(array_b))
 345                 return false;
 346
 347         for (i = 0; array_a[i] &&
 348                              array_b[i]; i++) {
 349                 if (g_strcmp0(array_a[i], array_b[i]) != 0)
 350                         return false;
 351         }
 352
 353         return true;
 354 }
 355
 356 static bool apply_lease_available_on_network(GDHCPClient *dhcp_client,
 357                                                 struct connman_dhcp *dhcp)
 358 {
 359         char **nameservers, **timeservers, *pac = NULL;
 360         struct connman_service *service;
 361         GList *list, *option = NULL;
 362         int ns_entries;
 363         int i;
 364
 365         if (!dhcp->network)
 366                 return true;
 367
 368         service = connman_service_lookup_from_network(dhcp->network);
 369         if (!service) {
 370                 connman_error("Can not lookup service");
 371                 return false;
 372         }
 373
 374         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_MTU);
 375         if (option && option->data) {
 376                 int mtu, index, err;
 377
 378                 mtu = atoi(option->data);
 379
 380                 if (mtu >= IPV6_MIN_MTU && mtu <= ETH_DATA_LEN) {
 381                         index = __connman_ipconfig_get_index(dhcp->ipconfig);
 382                         err = connman_inet_set_mtu(index, mtu);
 383
 384                         DBG("MTU %d index %d err %d", mtu, index, err);
 385                 }
 386         }
 387
 388         option = g_dhcp_client_get_option(dhcp_client, 252);
 389         if (option)
 390                 pac = g_strdup(option->data);
 391
 392         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_DNS_SERVER);
 393         ns_entries = g_list_length(option);
 394         nameservers = g_try_new0(char *, ns_entries + 1);
 395         if (nameservers) {
 396                 for (i = 0, list = option;list; list = list->next, i++)
 397                         nameservers[i] = g_strdup(list->data);
 398                 nameservers[ns_entries] = NULL;
 399         }
 400
 401         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_DOMAIN_NAME);
 402         if (option)
 403                 __connman_service_set_domainname(service, option->data);
 404
 405         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_HOST_NAME);
 406         if (option)
 407                 __connman_service_set_hostname(service, option->data);
 408
 409         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_NTP_SERVER);
 410         ns_entries = g_list_length(option);
 411         timeservers = g_try_new0(char *, ns_entries + 1);
 412         if (timeservers) {
 413                 for (i = 0, list = option; list; list = list->next, i++)
 414                         timeservers[i] = g_strdup(list->data);
 415                 timeservers[ns_entries] = NULL;
 416         }
 417
 418         if (!compare_string_arrays(nameservers, dhcp->nameservers)) {
 419                 if (dhcp->nameservers) {
 420 #if defined TIZEN_EXT
 421                         for (i = 0; dhcp->nameservers[i] != NULL; i++) {
 422                                 __connman_service_nameserver_remove(service,
 423                                                 dhcp->nameservers[i], false,
 424                                                 CONNMAN_IPCONFIG_TYPE_IPV4);
 425                         }
 426 #else
 427                         for (i = 0; dhcp->nameservers[i]; i++) {
 428                                 __connman_service_nameserver_remove(service,
 429                                                 dhcp->nameservers[i], false);
 430                         }
 431 #endif
 432                         g_strfreev(dhcp->nameservers);
 433                 }
 434
 435                 dhcp->nameservers = nameservers;
 436
 437                 for (i = 0; dhcp->nameservers && dhcp->nameservers[i]; i++) {
 438 #if defined TIZEN_EXT
 439                         __connman_service_nameserver_append(service,
 440                                                 dhcp->nameservers[i], false,
 441                                                 CONNMAN_IPCONFIG_TYPE_IPV4);
 442 #else
 443                         __connman_service_nameserver_append(service,
 444                                                 dhcp->nameservers[i], false);
 445 #endif
 446                 }
 447         } else {
 448                 g_strfreev(nameservers);
 449         }
 450
 451         if (!compare_string_arrays(timeservers, dhcp->timeservers)) {
 452                 if (dhcp->timeservers) {
 453                         for (i = 0; dhcp->timeservers[i]; i++) {
 454                                 __connman_service_timeserver_remove(service,
 455                                                         dhcp->timeservers[i]);
 456                         }
 457                         g_strfreev(dhcp->timeservers);
 458                 }
 459
 460                 dhcp->timeservers = timeservers;
 461
 462                 for (i = 0; dhcp->timeservers && dhcp->timeservers[i]; i++) {
 463                         __connman_service_timeserver_append(service,
 464                                                         dhcp->timeservers[i]);
 465                 }
 466         } else {
 467                 g_strfreev(timeservers);
 468         }
 469
 470         if (g_strcmp0(pac, dhcp->pac) != 0) {
 471                 g_free(dhcp->pac);
 472                 dhcp->pac = pac;
 473
 474                 __connman_ipconfig_set_proxy_autoconfig(dhcp->ipconfig,
 475                                                                 dhcp->pac);
 476         }
 477
 478         if (connman_setting_get_bool("Enable6to4"))
 479                 __connman_6to4_probe(service);
 480
 481         return true;
 482 }
 483
 484 static void lease_available_cb(GDHCPClient *dhcp_client, gpointer user_data)
 485 {
 486         struct connman_dhcp *dhcp = user_data;
 487         GList *option = NULL;
 488         enum connman_ipconfig_method old_method;
 489         char *address, *netmask = NULL, *gateway = NULL;
 490         const char *c_address, *c_gateway;
 491         unsigned char prefixlen, c_prefixlen;
 492         bool ip_change = false;
 493
 494         DBG("Lease available");
 495
 496         if (dhcp->ipv4ll_client) {
 497                 ipv4ll_stop_client(dhcp);
 498                 dhcp_invalidate(dhcp, false);
 499         }
 500
 501         c_address = __connman_ipconfig_get_local(dhcp->ipconfig);
 502         c_gateway = __connman_ipconfig_get_gateway(dhcp->ipconfig);
 503         c_prefixlen = __connman_ipconfig_get_prefixlen(dhcp->ipconfig);
 504
 505         address = g_dhcp_client_get_address(dhcp_client);
 506
 507         __connman_ipconfig_set_dhcp_address(dhcp->ipconfig, address);
 508         DBG("last address %s", address);
 509
 510 #if defined TIZEN_EXT
 511         int dhcp_lease_duration = g_dhcp_client_get_dhcp_lease_duration(dhcp_client);
 512 #endif
 513
 514         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_SUBNET);
 515         if (option)
 516                 netmask = g_strdup(option->data);
 517
 518         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_ROUTER);
 519         if (option)
 520                 gateway = g_strdup(option->data);
 521
 522         prefixlen = connman_ipaddress_calc_netmask_len(netmask);
 523         if (prefixlen == 255)
 524                 connman_warn("netmask: %s is invalid", netmask);
 525
 526         DBG("c_address %s", c_address);
 527
 528         if (g_strcmp0(address, c_address)) {
 529                 ip_change = true;
 530                 if (c_address) {
 531                         /* Remove old ip address */
 532                         __connman_ipconfig_address_remove(dhcp->ipconfig);
 533                 }
 534         }
 535         if (g_strcmp0(gateway, c_gateway)) {
 536                 ip_change = true;
 537                 if (c_gateway) {
 538                         /* Remove gateway ip address */
 539                         __connman_ipconfig_gateway_remove(dhcp->ipconfig);
 540                 }
 541         } else if (prefixlen != c_prefixlen)
 542                 ip_change = true;
 543
 544         old_method = __connman_ipconfig_get_method(dhcp->ipconfig);
 545         __connman_ipconfig_set_method(dhcp->ipconfig,
 546                                                 CONNMAN_IPCONFIG_METHOD_DHCP);
 547
 548 #if defined TIZEN_EXT
 549         __connman_ipconfig_set_dhcp_lease_duration(dhcp->ipconfig, dhcp_lease_duration);
 550 #endif
 551
 552         /*
 553          * Notify IPv4.Configuration's method moved back to DHCP.
 554          *
 555          * This is the case ConnMan initially set an address by using
 556          * IPv4LL because DHCP failed but now we got an address from DHCP.
 557          */
 558         if (old_method == CONNMAN_IPCONFIG_METHOD_AUTO) {
 559                 struct connman_service *service =
 560                         connman_service_lookup_from_network(dhcp->network);
 561
 562                 if (service)
 563                         __connman_service_notify_ipv4_configuration(service);
 564         }
 565
 566         if (ip_change) {
 567                 __connman_ipconfig_set_local(dhcp->ipconfig, address);
 568                 __connman_ipconfig_set_prefixlen(dhcp->ipconfig, prefixlen);
 569                 __connman_ipconfig_set_gateway(dhcp->ipconfig, gateway);
 570         }
 571
 572         if (!apply_lease_available_on_network(dhcp_client, dhcp))
 573                 goto done;
 574
 575         if (ip_change)
 576                 dhcp_valid(dhcp);
 577
 578 done:
 579         g_free(address);
 580         g_free(netmask);
 581         g_free(gateway);
 582 }
 583
 584 static void ipv4ll_available_cb(GDHCPClient *ipv4ll_client, gpointer user_data)
 585 {
 586         struct connman_dhcp *dhcp = user_data;
 587         enum connman_ipconfig_method old_method;
 588         char *address, *netmask;
 589         unsigned char prefixlen;
 590
 591         DBG("IPV4LL available");
 592
 593         address = g_dhcp_client_get_address(ipv4ll_client);
 594         netmask = g_dhcp_client_get_netmask(ipv4ll_client);
 595
 596         prefixlen = connman_ipaddress_calc_netmask_len(netmask);
 597
 598         old_method = __connman_ipconfig_get_method(dhcp->ipconfig);
 599         __connman_ipconfig_set_method(dhcp->ipconfig,
 600                                                 CONNMAN_IPCONFIG_METHOD_AUTO);
 601
 602         /*
 603          * Notify IPv4.Configuration's method is AUTO now.
 604          *
 605          * This is the case DHCP failed thus ConnMan used IPv4LL to get an
 606          * address. Set IPv4.Configuration method to AUTO allows user to
 607          * ask for a DHCP address by setting the method again to DHCP.
 608          */
 609         if (old_method == CONNMAN_IPCONFIG_METHOD_DHCP) {
 610                 struct connman_service *service =
 611                         connman_service_lookup_from_network(dhcp->network);
 612
 613                 if (service)
 614                         __connman_service_notify_ipv4_configuration(service);
 615         }
 616
 617         __connman_ipconfig_set_local(dhcp->ipconfig, address);
 618         __connman_ipconfig_set_prefixlen(dhcp->ipconfig, prefixlen);
 619         __connman_ipconfig_set_gateway(dhcp->ipconfig, NULL);
 620
 621         dhcp_valid(dhcp);
 622
 623         g_free(address);
 624         g_free(netmask);
 625 }
 626
 627 static int dhcp_initialize(struct connman_dhcp *dhcp)
 628 {
 629         GDHCPClient *dhcp_client;
 630         GDHCPClientError error;
 631         int index;
 632         const char *vendor_class_id;
 633
 634         DBG("dhcp %p", dhcp);
 635
 636         index = __connman_ipconfig_get_index(dhcp->ipconfig);
 637
 638         dhcp_client = g_dhcp_client_new(G_DHCP_IPV4, index, &error);
 639         if (error != G_DHCP_CLIENT_ERROR_NONE)
 640 #if defined TIZEN_EXT
 641         {
 642                 DBG("failed g_dhcp_client_new(%d), index(%d)", error, index);
 643 #endif
 644                 return -EINVAL;
 645 #if defined TIZEN_EXT
 646         }
 647 #endif
 648
 649 #if !defined TIZEN_EXT
 650         if (getenv("CONNMAN_DHCP_DEBUG")) {
 651 #endif
 652                 dhcp->dhcp_debug_prefix = g_strdup_printf("DHCP index %d",
 653                                                         index);
 654                 g_dhcp_client_set_debug(dhcp_client, dhcp_debug,
 655                                         dhcp->dhcp_debug_prefix);
 656 #if !defined TIZEN_EXT
 657         }
 658 #endif
 659
 660         g_dhcp_client_set_id(dhcp_client);
 661
 662         if (dhcp->network) {
 663                 struct connman_service *service;
 664                 const char *hostname;
 665
 666                 service = connman_service_lookup_from_network(dhcp->network);
 667
 668                 hostname = __connman_service_get_hostname(service);
 669                 if (!hostname)
 670                         hostname = connman_utsname_get_hostname();
 671
 672                 if (hostname)
 673                         g_dhcp_client_set_send(dhcp_client,
 674                                                 G_DHCP_HOST_NAME, hostname);
 675
 676                 g_dhcp_client_set_request(dhcp_client, G_DHCP_HOST_NAME);
 677                 g_dhcp_client_set_request(dhcp_client, G_DHCP_DNS_SERVER);
 678                 g_dhcp_client_set_request(dhcp_client, G_DHCP_DOMAIN_NAME);
 679                 g_dhcp_client_set_request(dhcp_client, G_DHCP_NTP_SERVER);
 680                 g_dhcp_client_set_request(dhcp_client, 252);
 681                 g_dhcp_client_set_request(dhcp_client, G_DHCP_MTU);
 682         }
 683
 684         g_dhcp_client_set_request(dhcp_client, G_DHCP_ROUTER);
 685         g_dhcp_client_set_request(dhcp_client, G_DHCP_SUBNET);
 686
 687         vendor_class_id = connman_setting_get_string("VendorClassID");
 688         if (vendor_class_id)
 689                 g_dhcp_client_set_send(dhcp_client, G_DHCP_VENDOR_CLASS_ID,
 690                                         vendor_class_id);
 691
 692         g_dhcp_client_register_event(dhcp_client,
 693                         G_DHCP_CLIENT_EVENT_LEASE_AVAILABLE,
 694                                                 lease_available_cb, dhcp);
 695
 696         g_dhcp_client_register_event(dhcp_client,
 697                         G_DHCP_CLIENT_EVENT_LEASE_LOST, lease_lost_cb, dhcp);
 698
 699         g_dhcp_client_register_event(dhcp_client,
 700                         G_DHCP_CLIENT_EVENT_NO_LEASE, no_lease_cb, dhcp);
 701
 702         dhcp->dhcp_client = dhcp_client;
 703
 704         return 0;
 705 }
 706
 707 static int dhcp_release(struct connman_dhcp *dhcp)
 708 {
 709         DBG("dhcp %p", dhcp);
 710
 711         if (dhcp->timeout > 0) {
 712                 g_source_remove(dhcp->timeout);
 713                 dhcp->timeout = 0;
 714         }
 715
 716         if (dhcp->dhcp_client) {
 717                 g_dhcp_client_stop(dhcp->dhcp_client);
 718                 g_dhcp_client_unref(dhcp->dhcp_client);
 719         }
 720
 721         dhcp->dhcp_client = NULL;
 722
 723         g_free(dhcp->dhcp_debug_prefix);
 724         dhcp->dhcp_debug_prefix = NULL;
 725
 726         ipv4ll_stop_client(dhcp);
 727
 728         return 0;
 729 }
 730
 731 char *__connman_dhcp_get_server_address(struct connman_ipconfig *ipconfig)
 732 {
 733         struct connman_dhcp *dhcp;
 734
 735         dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
 736         if (!dhcp)
 737                 return NULL;
 738
 739         return g_dhcp_client_get_server_address(dhcp->dhcp_client);
 740 }
 741
 742 #if defined TIZEN_EXT_WIFI_MESH
 743 int __connman_mesh_dhcp_start(struct connman_ipconfig *ipconfig,
 744                         dhcp_cb callback, gpointer user_data)
 745 {
 746         struct connman_dhcp *dhcp;
 747         int err;
 748
 749         DBG("");
 750
 751         dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
 752         if (!dhcp) {
 753
 754                 dhcp = g_try_new0(struct connman_dhcp, 1);
 755                 if (!dhcp)
 756                         return -ENOMEM;
 757
 758                 dhcp->ipconfig = ipconfig;
 759                 __connman_ipconfig_ref(ipconfig);
 760
 761                 err = dhcp_initialize(dhcp);
 762
 763                 if (err < 0) {
 764                         g_free(dhcp);
 765                         return err;
 766                 }
 767
 768                 g_hash_table_insert(ipconfig_table, ipconfig, dhcp);
 769         }
 770
 771         dhcp->callback = callback;
 772         dhcp->user_data = user_data;
 773         return g_dhcp_client_start(dhcp->dhcp_client, NULL);
 774 }
 775 #endif
 776
 777 int __connman_dhcp_start(struct connman_ipconfig *ipconfig,
 778                         struct connman_network *network, dhcp_cb callback,
 779                         gpointer user_data)
 780 {
 781 #if !defined TIZEN_EXT
 782         const char *last_addr = NULL;
 783 #endif
 784         struct connman_dhcp *dhcp;
 785         int err;
 786
 787         DBG("");
 788
 789         if (network) {
 790                 struct connman_service *service;
 791
 792                 service = connman_service_lookup_from_network(network);
 793                 if (!service)
 794                         return -EINVAL;
 795         }
 796
 797 #if !defined TIZEN_EXT
 798         last_addr = __connman_ipconfig_get_dhcp_address(ipconfig);
 799 #endif
 800
 801         dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
 802         if (!dhcp) {
 803
 804                 dhcp = g_try_new0(struct connman_dhcp, 1);
 805                 if (!dhcp)
 806                         return -ENOMEM;
 807
 808                 dhcp->ipconfig = ipconfig;
 809                 __connman_ipconfig_ref(ipconfig);
 810
 811                 if (network) {
 812                         dhcp->network = network;
 813                         connman_network_ref(network);
 814                 }
 815
 816                 err = dhcp_initialize(dhcp);
 817
 818                 if (err < 0) {
 819                         if (network)
 820                                 connman_network_unref(network);
 821                         g_free(dhcp);
 822                         return err;
 823                 }
 824
 825                 g_hash_table_insert(ipconfig_table, ipconfig, dhcp);
 826         }
 827
 828         dhcp->callback = callback;
 829         dhcp->user_data = user_data;
 830
 831 #if defined TIZEN_EXT
 832         DBG("Start DHCP with DHCPDISCOVER request");
 833
 834         return g_dhcp_client_start(dhcp->dhcp_client, NULL);
 835 #else
 836         return g_dhcp_client_start(dhcp->dhcp_client, last_addr);
 837 #endif
 838 }
 839
 840 void __connman_dhcp_stop(struct connman_ipconfig *ipconfig)
 841 {
 842         struct connman_dhcp *dhcp;
 843
 844         DBG("ipconfig_table %p ipconfig %p", ipconfig_table, ipconfig);
 845
 846         if (!ipconfig_table)
 847                 return;
 848
 849         dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
 850         if (dhcp) {
 851                 g_hash_table_remove(ipconfig_table, ipconfig);
 852                 __connman_ipconfig_unref(ipconfig);
 853                 if (dhcp->network)
 854                         connman_network_unref(dhcp->network);
 855                 dhcp_release(dhcp);
 856                 dhcp_invalidate(dhcp, false);
 857                 dhcp_free(dhcp);
 858         }
 859 }
 860
 861 void __connman_dhcp_decline(struct connman_ipconfig *ipconfig)
 862 {
 863         struct connman_dhcp *dhcp;
 864         const char *address;
 865         struct in_addr addr;
 866
 867         DBG("ipconfig_table %p ipconfig %p", ipconfig_table, ipconfig);
 868
 869         if (!ipconfig_table)
 870                 return;
 871
 872         dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
 873         if (dhcp) {
 874                 address = __connman_ipconfig_get_local(ipconfig);
 875                 if (!address)
 876                         return;
 877
 878                 if (inet_pton(AF_INET, address, &addr) != 1)
 879                         connman_error("Could not convert address %s", address);
 880
 881                 g_dhcp_client_decline(dhcp->dhcp_client, htonl(addr.s_addr));
 882         }
 883 }
 884
 885 int __connman_dhcp_init(void)
 886 {
 887         DBG("");
 888
 889         ipconfig_table = g_hash_table_new_full(g_direct_hash, g_direct_equal,
 890                                                                 NULL, NULL);
 891
 892         return 0;
 893 }
 894
 895 void __connman_dhcp_cleanup(void)
 896 {
 897         DBG("");
 898
 899         g_hash_table_destroy(ipconfig_table);
 900         ipconfig_table = NULL;
 901 }