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 (dhcp->network &&
 289                         connman_network_get_bool(dhcp->network, "WiFi.RoamingDHCP")) {
 290                 connman_network_set_bool(dhcp->network, "WiFi.RoamingDHCP", false);
 291                 __connman_network_enable_ipconfig(dhcp->network, dhcp->ipconfig);
 292
 293                 return;
 294         }
 295
 296         if (connman_setting_get_bool("EnableAutoIp") == false) {
 297                 DBG("link-local address autoconfiguration is disabled.");
 298                 if (dhcp->network)
 299                         __connman_network_disconnect(dhcp->network);
 300                 return;
 301         }
 302 #endif
 303         if (dhcp->timeout > 0)
 304                 g_source_remove(dhcp->timeout);
 305
 306         dhcp->timeout = g_timeout_add_seconds(RATE_LIMIT_INTERVAL,
 307                                                 dhcp_retry_cb,
 308                                                 dhcp);
 309         if (dhcp->ipv4ll_running)
 310                 return;
 311
 312         err = ipv4ll_start_client(dhcp);
 313         if (err < 0)
 314                 DBG("Cannot start ipv4ll client (%d/%s)", err, strerror(-err));
 315
 316         /* Only notify upper layer if we have a problem */
 317         dhcp_invalidate(dhcp, !dhcp->ipv4ll_running);
 318 }
 319
 320 static void lease_lost_cb(GDHCPClient *dhcp_client, gpointer user_data)
 321 {
 322         struct connman_dhcp *dhcp = user_data;
 323
 324         DBG("Lease lost");
 325
 326         /* Upper layer will decide what to do, e.g. nothing or retry. */
 327         dhcp_invalidate(dhcp, true);
 328 }
 329
 330 static void ipv4ll_lost_cb(GDHCPClient *dhcp_client, gpointer user_data)
 331 {
 332         struct connman_dhcp *dhcp = user_data;
 333
 334         DBG("Lease lost");
 335
 336         ipv4ll_stop_client(dhcp);
 337
 338         /*
 339          * Since we lost our IPv4LL configuration we might as notify
 340          * the upper layers.
 341          */
 342         dhcp_invalidate(dhcp, true);
 343 }
 344
 345 static bool compare_string_arrays(char **array_a, char **array_b)
 346 {
 347         int i;
 348
 349         if (!array_a || !array_b)
 350                 return false;
 351
 352         if (g_strv_length(array_a) != g_strv_length(array_b))
 353                 return false;
 354
 355         for (i = 0; array_a[i] &&
 356                              array_b[i]; i++) {
 357                 if (g_strcmp0(array_a[i], array_b[i]) != 0)
 358                         return false;
 359         }
 360
 361         return true;
 362 }
 363
 364 static bool apply_lease_available_on_network(GDHCPClient *dhcp_client,
 365                                                 struct connman_dhcp *dhcp)
 366 {
 367         char **nameservers, **timeservers, *pac = NULL;
 368         struct connman_service *service;
 369         GList *list, *option = NULL;
 370         int ns_entries;
 371         int i;
 372
 373         if (!dhcp->network)
 374                 return true;
 375
 376         service = connman_service_lookup_from_network(dhcp->network);
 377         if (!service) {
 378                 connman_error("Can not lookup service");
 379                 return false;
 380         }
 381
 382         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_MTU);
 383         if (option && option->data) {
 384                 int mtu, index, err;
 385
 386                 mtu = atoi(option->data);
 387
 388                 if (mtu >= IPV6_MIN_MTU && mtu <= ETH_DATA_LEN) {
 389                         index = __connman_ipconfig_get_index(dhcp->ipconfig);
 390                         err = connman_inet_set_mtu(index, mtu);
 391
 392                         DBG("MTU %d index %d err %d", mtu, index, err);
 393                 }
 394         }
 395
 396         option = g_dhcp_client_get_option(dhcp_client, 252);
 397         if (option)
 398                 pac = g_strdup(option->data);
 399
 400         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_DNS_SERVER);
 401         ns_entries = g_list_length(option);
 402         nameservers = g_try_new0(char *, ns_entries + 1);
 403         if (nameservers) {
 404                 for (i = 0, list = option;list; list = list->next, i++)
 405                         nameservers[i] = g_strdup(list->data);
 406                 nameservers[ns_entries] = NULL;
 407         }
 408
 409         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_DOMAIN_NAME);
 410         if (option)
 411                 __connman_service_set_domainname(service, option->data);
 412
 413         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_HOST_NAME);
 414         if (option)
 415                 __connman_service_set_hostname(service, option->data);
 416
 417         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_NTP_SERVER);
 418         ns_entries = g_list_length(option);
 419         timeservers = g_try_new0(char *, ns_entries + 1);
 420         if (timeservers) {
 421                 for (i = 0, list = option; list; list = list->next, i++)
 422                         timeservers[i] = g_strdup(list->data);
 423                 timeservers[ns_entries] = NULL;
 424         }
 425
 426         if (!compare_string_arrays(nameservers, dhcp->nameservers)) {
 427                 if (dhcp->nameservers) {
 428 #if defined TIZEN_EXT
 429                         for (i = 0; dhcp->nameservers[i] != NULL; i++) {
 430                                 __connman_service_nameserver_remove(service,
 431                                                 dhcp->nameservers[i], false,
 432                                                 CONNMAN_IPCONFIG_TYPE_IPV4);
 433                         }
 434 #else
 435                         for (i = 0; dhcp->nameservers[i]; i++) {
 436                                 __connman_service_nameserver_remove(service,
 437                                                 dhcp->nameservers[i], false);
 438                         }
 439 #endif
 440                         g_strfreev(dhcp->nameservers);
 441                 }
 442
 443                 dhcp->nameservers = nameservers;
 444
 445                 for (i = 0; dhcp->nameservers && dhcp->nameservers[i]; i++) {
 446 #if defined TIZEN_EXT
 447                         __connman_service_nameserver_append(service,
 448                                                 dhcp->nameservers[i], false,
 449                                                 CONNMAN_IPCONFIG_TYPE_IPV4);
 450 #else
 451                         __connman_service_nameserver_append(service,
 452                                                 dhcp->nameservers[i], false);
 453 #endif
 454                 }
 455         } else {
 456                 g_strfreev(nameservers);
 457         }
 458
 459         if (!compare_string_arrays(timeservers, dhcp->timeservers)) {
 460                 if (dhcp->timeservers) {
 461                         for (i = 0; dhcp->timeservers[i]; i++) {
 462                                 __connman_service_timeserver_remove(service,
 463                                                         dhcp->timeservers[i]);
 464                         }
 465                         g_strfreev(dhcp->timeservers);
 466                 }
 467
 468                 dhcp->timeservers = timeservers;
 469
 470                 for (i = 0; dhcp->timeservers && dhcp->timeservers[i]; i++) {
 471                         __connman_service_timeserver_append(service,
 472                                                         dhcp->timeservers[i]);
 473                 }
 474         } else {
 475                 g_strfreev(timeservers);
 476         }
 477
 478         if (g_strcmp0(pac, dhcp->pac) != 0) {
 479                 g_free(dhcp->pac);
 480                 dhcp->pac = pac;
 481
 482                 __connman_ipconfig_set_proxy_autoconfig(dhcp->ipconfig,
 483                                                                 dhcp->pac);
 484         }
 485
 486         if (connman_setting_get_bool("Enable6to4"))
 487                 __connman_6to4_probe(service);
 488
 489         return true;
 490 }
 491
 492 static void lease_available_cb(GDHCPClient *dhcp_client, gpointer user_data)
 493 {
 494         struct connman_dhcp *dhcp = user_data;
 495         GList *option = NULL;
 496         enum connman_ipconfig_method old_method;
 497         char *address, *netmask = NULL, *gateway = NULL;
 498         const char *c_address, *c_gateway;
 499         unsigned char prefixlen, c_prefixlen;
 500         bool ip_change = false;
 501
 502         DBG("Lease available");
 503
 504         if (dhcp->ipv4ll_client) {
 505                 ipv4ll_stop_client(dhcp);
 506                 dhcp_invalidate(dhcp, false);
 507         }
 508
 509         c_address = __connman_ipconfig_get_local(dhcp->ipconfig);
 510         c_gateway = __connman_ipconfig_get_gateway(dhcp->ipconfig);
 511         c_prefixlen = __connman_ipconfig_get_prefixlen(dhcp->ipconfig);
 512
 513         address = g_dhcp_client_get_address(dhcp_client);
 514
 515         __connman_ipconfig_set_dhcp_address(dhcp->ipconfig, address);
 516         DBG("last address %s", address);
 517
 518 #if defined TIZEN_EXT
 519         int dhcp_lease_duration = g_dhcp_client_get_dhcp_lease_duration(dhcp_client);
 520 #endif
 521
 522         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_SUBNET);
 523         if (option)
 524                 netmask = g_strdup(option->data);
 525
 526         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_ROUTER);
 527         if (option)
 528                 gateway = g_strdup(option->data);
 529
 530         prefixlen = connman_ipaddress_calc_netmask_len(netmask);
 531         if (prefixlen == 255)
 532                 connman_warn("netmask: %s is invalid", netmask);
 533
 534         DBG("c_address %s", c_address);
 535
 536         if (g_strcmp0(address, c_address)) {
 537                 ip_change = true;
 538                 if (c_address) {
 539                         /* Remove old ip address */
 540                         __connman_ipconfig_address_remove(dhcp->ipconfig);
 541                 }
 542         }
 543         if (g_strcmp0(gateway, c_gateway)) {
 544                 ip_change = true;
 545                 if (c_gateway) {
 546                         /* Remove gateway ip address */
 547                         __connman_ipconfig_gateway_remove(dhcp->ipconfig);
 548                 }
 549         } else if (prefixlen != c_prefixlen)
 550                 ip_change = true;
 551
 552         old_method = __connman_ipconfig_get_method(dhcp->ipconfig);
 553         __connman_ipconfig_set_method(dhcp->ipconfig,
 554                                                 CONNMAN_IPCONFIG_METHOD_DHCP);
 555
 556 #if defined TIZEN_EXT
 557         __connman_ipconfig_set_dhcp_lease_duration(dhcp->ipconfig, dhcp_lease_duration);
 558 #endif
 559
 560         /*
 561          * Notify IPv4.Configuration's method moved back to DHCP.
 562          *
 563          * This is the case ConnMan initially set an address by using
 564          * IPv4LL because DHCP failed but now we got an address from DHCP.
 565          */
 566         if (old_method == CONNMAN_IPCONFIG_METHOD_AUTO) {
 567                 struct connman_service *service =
 568                         connman_service_lookup_from_network(dhcp->network);
 569
 570                 if (service)
 571                         __connman_service_notify_ipv4_configuration(service);
 572         }
 573
 574 #if defined TIZEN_EXT
 575         if (connman_network_get_bool(dhcp->network, "WiFi.RoamingDHCP")) {
 576
 577                 if (ip_change)
 578                         connman_service_notify_reconnection(
 579                                 connman_service_lookup_from_network(dhcp->network));
 580
 581                 connman_network_set_bool(dhcp->network, "WiFi.RoamingDHCP", false);
 582         }
 583 #endif
 584
 585         if (ip_change) {
 586                 __connman_ipconfig_set_local(dhcp->ipconfig, address);
 587                 __connman_ipconfig_set_prefixlen(dhcp->ipconfig, prefixlen);
 588                 __connman_ipconfig_set_gateway(dhcp->ipconfig, gateway);
 589         }
 590
 591         if (!apply_lease_available_on_network(dhcp_client, dhcp))
 592                 goto done;
 593
 594         if (ip_change)
 595                 dhcp_valid(dhcp);
 596
 597 done:
 598         g_free(address);
 599         g_free(netmask);
 600         g_free(gateway);
 601 }
 602
 603 static void ipv4ll_available_cb(GDHCPClient *ipv4ll_client, gpointer user_data)
 604 {
 605         struct connman_dhcp *dhcp = user_data;
 606         enum connman_ipconfig_method old_method;
 607         char *address, *netmask;
 608         unsigned char prefixlen;
 609
 610         DBG("IPV4LL available");
 611
 612         address = g_dhcp_client_get_address(ipv4ll_client);
 613         netmask = g_dhcp_client_get_netmask(ipv4ll_client);
 614
 615         prefixlen = connman_ipaddress_calc_netmask_len(netmask);
 616
 617         old_method = __connman_ipconfig_get_method(dhcp->ipconfig);
 618         __connman_ipconfig_set_method(dhcp->ipconfig,
 619                                                 CONNMAN_IPCONFIG_METHOD_AUTO);
 620
 621         /*
 622          * Notify IPv4.Configuration's method is AUTO now.
 623          *
 624          * This is the case DHCP failed thus ConnMan used IPv4LL to get an
 625          * address. Set IPv4.Configuration method to AUTO allows user to
 626          * ask for a DHCP address by setting the method again to DHCP.
 627          */
 628         if (old_method == CONNMAN_IPCONFIG_METHOD_DHCP) {
 629                 struct connman_service *service =
 630                         connman_service_lookup_from_network(dhcp->network);
 631
 632                 if (service)
 633                         __connman_service_notify_ipv4_configuration(service);
 634         }
 635
 636         __connman_ipconfig_set_local(dhcp->ipconfig, address);
 637         __connman_ipconfig_set_prefixlen(dhcp->ipconfig, prefixlen);
 638         __connman_ipconfig_set_gateway(dhcp->ipconfig, NULL);
 639
 640         dhcp_valid(dhcp);
 641
 642         g_free(address);
 643         g_free(netmask);
 644 }
 645
 646 static int dhcp_initialize(struct connman_dhcp *dhcp)
 647 {
 648         GDHCPClient *dhcp_client;
 649         GDHCPClientError error;
 650         int index;
 651         const char *vendor_class_id;
 652
 653         DBG("dhcp %p", dhcp);
 654
 655         index = __connman_ipconfig_get_index(dhcp->ipconfig);
 656
 657         dhcp_client = g_dhcp_client_new(G_DHCP_IPV4, index, &error);
 658         if (error != G_DHCP_CLIENT_ERROR_NONE)
 659 #if defined TIZEN_EXT
 660         {
 661                 DBG("failed g_dhcp_client_new(%d), index(%d)", error, index);
 662 #endif
 663                 return -EINVAL;
 664 #if defined TIZEN_EXT
 665         }
 666 #endif
 667
 668 #if !defined TIZEN_EXT
 669         if (getenv("CONNMAN_DHCP_DEBUG")) {
 670 #endif
 671                 dhcp->dhcp_debug_prefix = g_strdup_printf("DHCP index %d",
 672                                                         index);
 673                 g_dhcp_client_set_debug(dhcp_client, dhcp_debug,
 674                                         dhcp->dhcp_debug_prefix);
 675 #if !defined TIZEN_EXT
 676         }
 677 #endif
 678
 679         g_dhcp_client_set_id(dhcp_client);
 680
 681         if (dhcp->network) {
 682                 struct connman_service *service;
 683                 const char *hostname;
 684
 685                 service = connman_service_lookup_from_network(dhcp->network);
 686
 687                 hostname = __connman_service_get_hostname(service);
 688                 if (!hostname)
 689                         hostname = connman_utsname_get_hostname();
 690
 691                 if (hostname)
 692                         g_dhcp_client_set_send(dhcp_client,
 693                                                 G_DHCP_HOST_NAME, hostname);
 694
 695                 g_dhcp_client_set_request(dhcp_client, G_DHCP_HOST_NAME);
 696                 g_dhcp_client_set_request(dhcp_client, G_DHCP_DNS_SERVER);
 697                 g_dhcp_client_set_request(dhcp_client, G_DHCP_DOMAIN_NAME);
 698                 g_dhcp_client_set_request(dhcp_client, G_DHCP_NTP_SERVER);
 699                 g_dhcp_client_set_request(dhcp_client, 252);
 700                 g_dhcp_client_set_request(dhcp_client, G_DHCP_MTU);
 701         }
 702
 703         g_dhcp_client_set_request(dhcp_client, G_DHCP_ROUTER);
 704         g_dhcp_client_set_request(dhcp_client, G_DHCP_SUBNET);
 705
 706         vendor_class_id = connman_setting_get_string("VendorClassID");
 707         if (vendor_class_id)
 708                 g_dhcp_client_set_send(dhcp_client, G_DHCP_VENDOR_CLASS_ID,
 709                                         vendor_class_id);
 710
 711         g_dhcp_client_register_event(dhcp_client,
 712                         G_DHCP_CLIENT_EVENT_LEASE_AVAILABLE,
 713                                                 lease_available_cb, dhcp);
 714
 715         g_dhcp_client_register_event(dhcp_client,
 716                         G_DHCP_CLIENT_EVENT_LEASE_LOST, lease_lost_cb, dhcp);
 717
 718         g_dhcp_client_register_event(dhcp_client,
 719                         G_DHCP_CLIENT_EVENT_NO_LEASE, no_lease_cb, dhcp);
 720
 721         dhcp->dhcp_client = dhcp_client;
 722
 723         return 0;
 724 }
 725
 726 static int dhcp_release(struct connman_dhcp *dhcp)
 727 {
 728         DBG("dhcp %p", dhcp);
 729
 730         if (dhcp->timeout > 0) {
 731                 g_source_remove(dhcp->timeout);
 732                 dhcp->timeout = 0;
 733         }
 734
 735         if (dhcp->dhcp_client) {
 736                 g_dhcp_client_stop(dhcp->dhcp_client);
 737                 g_dhcp_client_unref(dhcp->dhcp_client);
 738         }
 739
 740         dhcp->dhcp_client = NULL;
 741
 742         g_free(dhcp->dhcp_debug_prefix);
 743         dhcp->dhcp_debug_prefix = NULL;
 744
 745         ipv4ll_stop_client(dhcp);
 746
 747         return 0;
 748 }
 749
 750 char *__connman_dhcp_get_server_address(struct connman_ipconfig *ipconfig)
 751 {
 752         struct connman_dhcp *dhcp;
 753
 754         dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
 755         if (!dhcp)
 756                 return NULL;
 757
 758         return g_dhcp_client_get_server_address(dhcp->dhcp_client);
 759 }
 760
 761 #if defined TIZEN_EXT_WIFI_MESH
 762 int __connman_mesh_dhcp_start(struct connman_ipconfig *ipconfig,
 763                         dhcp_cb callback, gpointer user_data)
 764 {
 765         struct connman_dhcp *dhcp;
 766         int err;
 767
 768         DBG("");
 769
 770         dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
 771         if (!dhcp) {
 772
 773                 dhcp = g_try_new0(struct connman_dhcp, 1);
 774                 if (!dhcp)
 775                         return -ENOMEM;
 776
 777                 dhcp->ipconfig = ipconfig;
 778                 __connman_ipconfig_ref(ipconfig);
 779
 780                 err = dhcp_initialize(dhcp);
 781
 782                 if (err < 0) {
 783                         g_free(dhcp);
 784                         return err;
 785                 }
 786
 787                 g_hash_table_insert(ipconfig_table, ipconfig, dhcp);
 788         }
 789
 790         dhcp->callback = callback;
 791         dhcp->user_data = user_data;
 792         return g_dhcp_client_start(dhcp->dhcp_client, NULL);
 793 }
 794 #endif
 795
 796 int __connman_dhcp_start(struct connman_ipconfig *ipconfig,
 797                         struct connman_network *network, dhcp_cb callback,
 798                         gpointer user_data)
 799 {
 800 #if !defined TIZEN_EXT
 801         const char *last_addr = NULL;
 802 #endif
 803         struct connman_dhcp *dhcp;
 804         int err;
 805
 806         DBG("");
 807
 808         if (network) {
 809                 struct connman_service *service;
 810
 811                 service = connman_service_lookup_from_network(network);
 812                 if (!service)
 813                         return -EINVAL;
 814         }
 815
 816 #if !defined TIZEN_EXT
 817         last_addr = __connman_ipconfig_get_dhcp_address(ipconfig);
 818 #endif
 819
 820         dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
 821         if (!dhcp) {
 822
 823                 dhcp = g_try_new0(struct connman_dhcp, 1);
 824                 if (!dhcp)
 825                         return -ENOMEM;
 826
 827                 dhcp->ipconfig = ipconfig;
 828                 __connman_ipconfig_ref(ipconfig);
 829
 830                 if (network) {
 831                         dhcp->network = network;
 832                         connman_network_ref(network);
 833                 }
 834
 835                 err = dhcp_initialize(dhcp);
 836
 837                 if (err < 0) {
 838                         if (network)
 839                                 connman_network_unref(network);
 840                         g_free(dhcp);
 841                         return err;
 842                 }
 843
 844                 g_hash_table_insert(ipconfig_table, ipconfig, dhcp);
 845         }
 846
 847         dhcp->callback = callback;
 848         dhcp->user_data = user_data;
 849
 850 #if defined TIZEN_EXT
 851         if (connman_network_get_bool(network, "WiFi.RoamingDHCP")) {
 852                 const char *last_addr = __connman_ipconfig_get_dhcp_address(ipconfig);
 853
 854                 DBG("Start DHCP with last address request");
 855                 return g_dhcp_client_start(dhcp->dhcp_client, last_addr);
 856         } else {
 857                 DBG("Start DHCP with DHCPDISCOVER request");
 858                 return g_dhcp_client_start(dhcp->dhcp_client, NULL);
 859         }
 860 #else
 861         return g_dhcp_client_start(dhcp->dhcp_client, last_addr);
 862 #endif
 863 }
 864
 865 void __connman_dhcp_stop(struct connman_ipconfig *ipconfig)
 866 {
 867         struct connman_dhcp *dhcp;
 868
 869         DBG("ipconfig_table %p ipconfig %p", ipconfig_table, ipconfig);
 870
 871         if (!ipconfig_table)
 872                 return;
 873
 874         dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
 875         if (dhcp) {
 876                 g_hash_table_remove(ipconfig_table, ipconfig);
 877                 __connman_ipconfig_unref(ipconfig);
 878                 if (dhcp->network)
 879                         connman_network_unref(dhcp->network);
 880                 dhcp_release(dhcp);
 881                 dhcp_invalidate(dhcp, false);
 882                 dhcp_free(dhcp);
 883         }
 884 }
 885
 886 void __connman_dhcp_decline(struct connman_ipconfig *ipconfig)
 887 {
 888         struct connman_dhcp *dhcp;
 889         const char *address;
 890         struct in_addr addr;
 891
 892         DBG("ipconfig_table %p ipconfig %p", ipconfig_table, ipconfig);
 893
 894         if (!ipconfig_table)
 895                 return;
 896
 897         dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
 898         if (dhcp) {
 899                 address = __connman_ipconfig_get_local(ipconfig);
 900                 if (!address)
 901                         return;
 902
 903                 if (inet_pton(AF_INET, address, &addr) != 1)
 904                         connman_error("Could not convert address %s", address);
 905
 906                 g_dhcp_client_decline(dhcp->dhcp_client, htonl(addr.s_addr));
 907         }
 908 }
 909
 910 int __connman_dhcp_init(void)
 911 {
 912         DBG("");
 913
 914         ipconfig_table = g_hash_table_new_full(g_direct_hash, g_direct_equal,
 915                                                                 NULL, NULL);
 916
 917         return 0;
 918 }
 919
 920 void __connman_dhcp_cleanup(void)
 921 {
 922         DBG("");
 923
 924         g_hash_table_destroy(ipconfig_table);
 925         ipconfig_table = NULL;
 926 }