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 #if defined TIZEN_EXT
 269         DBG("dhcp %p", dhcp);
 270         DBG("dhcp->timeout %d", dhcp->timeout);
 271 #endif
 272         g_dhcp_client_start(dhcp->dhcp_client,
 273                         __connman_ipconfig_get_dhcp_address(dhcp->ipconfig));
 274
 275         return FALSE;
 276 }
 277
 278 static void no_lease_cb(GDHCPClient *dhcp_client, gpointer user_data)
 279 {
 280         struct connman_dhcp *dhcp = user_data;
 281         int err;
 282
 283         DBG("No lease available ipv4ll %d client %p", dhcp->ipv4ll_running,
 284                 dhcp->ipv4ll_client);
 285
 286         if (dhcp->timeout > 0)
 287                 g_source_remove(dhcp->timeout);
 288
 289         dhcp->timeout = g_timeout_add_seconds(RATE_LIMIT_INTERVAL,
 290                                                 dhcp_retry_cb,
 291                                                 dhcp);
 292         if (dhcp->ipv4ll_running)
 293                 return;
 294
 295         err = ipv4ll_start_client(dhcp);
 296         if (err < 0)
 297                 DBG("Cannot start ipv4ll client (%d/%s)", err, strerror(-err));
 298
 299         /* Only notify upper layer if we have a problem */
 300         dhcp_invalidate(dhcp, !dhcp->ipv4ll_running);
 301 }
 302
 303 static void lease_lost_cb(GDHCPClient *dhcp_client, gpointer user_data)
 304 {
 305         struct connman_dhcp *dhcp = user_data;
 306
 307         DBG("Lease lost");
 308
 309         /* Upper layer will decide what to do, e.g. nothing or retry. */
 310         dhcp_invalidate(dhcp, true);
 311 }
 312
 313 static void ipv4ll_lost_cb(GDHCPClient *dhcp_client, gpointer user_data)
 314 {
 315         struct connman_dhcp *dhcp = user_data;
 316
 317         DBG("Lease lost");
 318
 319         ipv4ll_stop_client(dhcp);
 320
 321         /*
 322          * Since we lost our IPv4LL configuration we might as notify
 323          * the upper layers.
 324          */
 325         dhcp_invalidate(dhcp, true);
 326 }
 327
 328 static bool compare_string_arrays(char **array_a, char **array_b)
 329 {
 330         int i;
 331
 332         if (!array_a || !array_b)
 333                 return false;
 334
 335         if (g_strv_length(array_a) != g_strv_length(array_b))
 336                 return false;
 337
 338         for (i = 0; array_a[i] &&
 339                              array_b[i]; i++) {
 340                 if (g_strcmp0(array_a[i], array_b[i]) != 0)
 341                         return false;
 342         }
 343
 344         return true;
 345 }
 346
 347 static bool apply_lease_available_on_network(GDHCPClient *dhcp_client,
 348                                                 struct connman_dhcp *dhcp)
 349 {
 350         char **nameservers, **timeservers, *pac = NULL;
 351         struct connman_service *service;
 352         GList *list, *option = NULL;
 353         int ns_entries;
 354         int i;
 355
 356         if (!dhcp->network)
 357                 return true;
 358
 359         service = connman_service_lookup_from_network(dhcp->network);
 360         if (!service) {
 361                 connman_error("Can not lookup service");
 362                 return false;
 363         }
 364
 365         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_MTU);
 366         if (option && option->data) {
 367                 int mtu, index, err;
 368
 369                 mtu = atoi(option->data);
 370
 371                 if (mtu >= IPV6_MIN_MTU && mtu <= ETH_DATA_LEN) {
 372                         index = __connman_ipconfig_get_index(dhcp->ipconfig);
 373                         err = connman_inet_set_mtu(index, mtu);
 374
 375                         DBG("MTU %d index %d err %d", mtu, index, err);
 376                 }
 377         }
 378
 379         option = g_dhcp_client_get_option(dhcp_client, 252);
 380         if (option)
 381                 pac = g_strdup(option->data);
 382
 383         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_DNS_SERVER);
 384         ns_entries = g_list_length(option);
 385         nameservers = g_try_new0(char *, ns_entries + 1);
 386         if (nameservers) {
 387                 for (i = 0, list = option;list; list = list->next, i++)
 388                         nameservers[i] = g_strdup(list->data);
 389                 nameservers[ns_entries] = NULL;
 390         }
 391
 392         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_DOMAIN_NAME);
 393         if (option)
 394                 __connman_service_set_domainname(service, option->data);
 395
 396         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_HOST_NAME);
 397         if (option)
 398                 __connman_service_set_hostname(service, option->data);
 399
 400         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_NTP_SERVER);
 401         ns_entries = g_list_length(option);
 402         timeservers = g_try_new0(char *, ns_entries + 1);
 403         if (timeservers) {
 404                 for (i = 0, list = option; list; list = list->next, i++)
 405                         timeservers[i] = g_strdup(list->data);
 406                 timeservers[ns_entries] = NULL;
 407         }
 408
 409         if (!compare_string_arrays(nameservers, dhcp->nameservers)) {
 410                 if (dhcp->nameservers) {
 411 #if defined TIZEN_EXT
 412                         for (i = 0; dhcp->nameservers[i] != NULL; i++) {
 413                                 __connman_service_nameserver_remove(service,
 414                                                 dhcp->nameservers[i], false,
 415                                                 CONNMAN_IPCONFIG_TYPE_IPV4);
 416                         }
 417 #else
 418                         for (i = 0; dhcp->nameservers[i]; i++) {
 419                                 __connman_service_nameserver_remove(service,
 420                                                 dhcp->nameservers[i], false);
 421                         }
 422 #endif
 423                         g_strfreev(dhcp->nameservers);
 424                 }
 425
 426                 dhcp->nameservers = nameservers;
 427
 428                 for (i = 0; dhcp->nameservers && dhcp->nameservers[i]; i++) {
 429 #if defined TIZEN_EXT
 430                         __connman_service_nameserver_append(service,
 431                                                 dhcp->nameservers[i], false,
 432                                                 CONNMAN_IPCONFIG_TYPE_IPV4);
 433 #else
 434                         __connman_service_nameserver_append(service,
 435                                                 dhcp->nameservers[i], false);
 436 #endif
 437                 }
 438         } else {
 439                 g_strfreev(nameservers);
 440         }
 441
 442         if (!compare_string_arrays(timeservers, dhcp->timeservers)) {
 443                 if (dhcp->timeservers) {
 444                         for (i = 0; dhcp->timeservers[i]; i++) {
 445                                 __connman_service_timeserver_remove(service,
 446                                                         dhcp->timeservers[i]);
 447                         }
 448                         g_strfreev(dhcp->timeservers);
 449                 }
 450
 451                 dhcp->timeservers = timeservers;
 452
 453                 for (i = 0; dhcp->timeservers && dhcp->timeservers[i]; i++) {
 454                         __connman_service_timeserver_append(service,
 455                                                         dhcp->timeservers[i]);
 456                 }
 457         } else {
 458                 g_strfreev(timeservers);
 459         }
 460
 461         if (g_strcmp0(pac, dhcp->pac) != 0) {
 462                 g_free(dhcp->pac);
 463                 dhcp->pac = pac;
 464
 465                 __connman_ipconfig_set_proxy_autoconfig(dhcp->ipconfig,
 466                                                                 dhcp->pac);
 467         }
 468
 469         if (connman_setting_get_bool("Enable6to4"))
 470                 __connman_6to4_probe(service);
 471
 472         return true;
 473 }
 474
 475 static void lease_available_cb(GDHCPClient *dhcp_client, gpointer user_data)
 476 {
 477         struct connman_dhcp *dhcp = user_data;
 478         GList *option = NULL;
 479         enum connman_ipconfig_method old_method;
 480         char *address, *netmask = NULL, *gateway = NULL;
 481         const char *c_address, *c_gateway;
 482         unsigned char prefixlen, c_prefixlen;
 483         bool ip_change = false;
 484
 485         DBG("Lease available");
 486
 487         if (dhcp->ipv4ll_client) {
 488                 ipv4ll_stop_client(dhcp);
 489                 dhcp_invalidate(dhcp, false);
 490         }
 491
 492         c_address = __connman_ipconfig_get_local(dhcp->ipconfig);
 493         c_gateway = __connman_ipconfig_get_gateway(dhcp->ipconfig);
 494         c_prefixlen = __connman_ipconfig_get_prefixlen(dhcp->ipconfig);
 495
 496         address = g_dhcp_client_get_address(dhcp_client);
 497
 498         __connman_ipconfig_set_dhcp_address(dhcp->ipconfig, address);
 499         DBG("last address %s", address);
 500
 501 #if defined TIZEN_EXT
 502         int dhcp_lease_duration = g_dhcp_client_get_dhcp_lease_duration(dhcp_client);
 503 #endif
 504
 505         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_SUBNET);
 506         if (option)
 507                 netmask = g_strdup(option->data);
 508
 509         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_ROUTER);
 510         if (option)
 511                 gateway = g_strdup(option->data);
 512
 513         prefixlen = connman_ipaddress_calc_netmask_len(netmask);
 514         if (prefixlen == 255)
 515                 connman_warn("netmask: %s is invalid", netmask);
 516
 517         DBG("c_address %s", c_address);
 518
 519         if (g_strcmp0(address, c_address)) {
 520                 ip_change = true;
 521                 if (c_address) {
 522                         /* Remove old ip address */
 523                         __connman_ipconfig_address_remove(dhcp->ipconfig);
 524                 }
 525         }
 526         if (g_strcmp0(gateway, c_gateway)) {
 527                 ip_change = true;
 528                 if (c_gateway) {
 529                         /* Remove gateway ip address */
 530                         __connman_ipconfig_gateway_remove(dhcp->ipconfig);
 531                 }
 532         } else if (prefixlen != c_prefixlen)
 533                 ip_change = true;
 534
 535         old_method = __connman_ipconfig_get_method(dhcp->ipconfig);
 536         __connman_ipconfig_set_method(dhcp->ipconfig,
 537                                                 CONNMAN_IPCONFIG_METHOD_DHCP);
 538
 539 #if defined TIZEN_EXT
 540         __connman_ipconfig_set_dhcp_lease_duration(dhcp->ipconfig, dhcp_lease_duration);
 541 #endif
 542
 543         /*
 544          * Notify IPv4.Configuration's method moved back to DHCP.
 545          *
 546          * This is the case ConnMan initially set an address by using
 547          * IPv4LL because DHCP failed but now we got an address from DHCP.
 548          */
 549         if (old_method == CONNMAN_IPCONFIG_METHOD_AUTO) {
 550                 struct connman_service *service =
 551                         connman_service_lookup_from_network(dhcp->network);
 552
 553                 if (service)
 554                         __connman_service_notify_ipv4_configuration(service);
 555         }
 556
 557         if (ip_change) {
 558                 __connman_ipconfig_set_local(dhcp->ipconfig, address);
 559                 __connman_ipconfig_set_prefixlen(dhcp->ipconfig, prefixlen);
 560                 __connman_ipconfig_set_gateway(dhcp->ipconfig, gateway);
 561         }
 562
 563         if (!apply_lease_available_on_network(dhcp_client, dhcp))
 564                 goto done;
 565
 566         if (ip_change)
 567                 dhcp_valid(dhcp);
 568
 569 done:
 570         g_free(address);
 571         g_free(netmask);
 572         g_free(gateway);
 573 }
 574
 575 static void ipv4ll_available_cb(GDHCPClient *ipv4ll_client, gpointer user_data)
 576 {
 577         struct connman_dhcp *dhcp = user_data;
 578         enum connman_ipconfig_method old_method;
 579         char *address, *netmask;
 580         unsigned char prefixlen;
 581
 582         DBG("IPV4LL available");
 583
 584         address = g_dhcp_client_get_address(ipv4ll_client);
 585         netmask = g_dhcp_client_get_netmask(ipv4ll_client);
 586
 587         prefixlen = connman_ipaddress_calc_netmask_len(netmask);
 588
 589         old_method = __connman_ipconfig_get_method(dhcp->ipconfig);
 590         __connman_ipconfig_set_method(dhcp->ipconfig,
 591                                                 CONNMAN_IPCONFIG_METHOD_AUTO);
 592
 593         /*
 594          * Notify IPv4.Configuration's method is AUTO now.
 595          *
 596          * This is the case DHCP failed thus ConnMan used IPv4LL to get an
 597          * address. Set IPv4.Configuration method to AUTO allows user to
 598          * ask for a DHCP address by setting the method again to DHCP.
 599          */
 600         if (old_method == CONNMAN_IPCONFIG_METHOD_DHCP) {
 601                 struct connman_service *service =
 602                         connman_service_lookup_from_network(dhcp->network);
 603
 604                 if (service)
 605                         __connman_service_notify_ipv4_configuration(service);
 606         }
 607
 608         __connman_ipconfig_set_local(dhcp->ipconfig, address);
 609         __connman_ipconfig_set_prefixlen(dhcp->ipconfig, prefixlen);
 610         __connman_ipconfig_set_gateway(dhcp->ipconfig, NULL);
 611
 612         dhcp_valid(dhcp);
 613
 614         g_free(address);
 615         g_free(netmask);
 616 }
 617
 618 static int dhcp_initialize(struct connman_dhcp *dhcp)
 619 {
 620         GDHCPClient *dhcp_client;
 621         GDHCPClientError error;
 622         int index;
 623         const char *vendor_class_id;
 624
 625         DBG("dhcp %p", dhcp);
 626
 627         index = __connman_ipconfig_get_index(dhcp->ipconfig);
 628
 629         dhcp_client = g_dhcp_client_new(G_DHCP_IPV4, index, &error);
 630         if (error != G_DHCP_CLIENT_ERROR_NONE)
 631 #if defined TIZEN_EXT
 632         {
 633                 DBG("failed g_dhcp_client_new(%d), index(%d)", error, index);
 634 #endif
 635                 return -EINVAL;
 636 #if defined TIZEN_EXT
 637         }
 638 #endif
 639
 640 #if !defined TIZEN_EXT
 641         if (getenv("CONNMAN_DHCP_DEBUG")) {
 642 #endif
 643                 dhcp->dhcp_debug_prefix = g_strdup_printf("DHCP index %d",
 644                                                         index);
 645                 g_dhcp_client_set_debug(dhcp_client, dhcp_debug,
 646                                         dhcp->dhcp_debug_prefix);
 647 #if !defined TIZEN_EXT
 648         }
 649 #endif
 650
 651         g_dhcp_client_set_id(dhcp_client);
 652
 653         if (dhcp->network) {
 654                 struct connman_service *service;
 655                 const char *hostname;
 656
 657                 service = connman_service_lookup_from_network(dhcp->network);
 658
 659                 hostname = __connman_service_get_hostname(service);
 660                 if (!hostname)
 661                         hostname = connman_utsname_get_hostname();
 662
 663                 if (hostname)
 664                         g_dhcp_client_set_send(dhcp_client,
 665                                                 G_DHCP_HOST_NAME, hostname);
 666
 667                 g_dhcp_client_set_request(dhcp_client, G_DHCP_HOST_NAME);
 668                 g_dhcp_client_set_request(dhcp_client, G_DHCP_DNS_SERVER);
 669                 g_dhcp_client_set_request(dhcp_client, G_DHCP_DOMAIN_NAME);
 670                 g_dhcp_client_set_request(dhcp_client, G_DHCP_NTP_SERVER);
 671                 g_dhcp_client_set_request(dhcp_client, 252);
 672                 g_dhcp_client_set_request(dhcp_client, G_DHCP_MTU);
 673         }
 674
 675         g_dhcp_client_set_request(dhcp_client, G_DHCP_ROUTER);
 676         g_dhcp_client_set_request(dhcp_client, G_DHCP_SUBNET);
 677
 678         vendor_class_id = connman_option_get_string("VendorClassID");
 679         if (vendor_class_id)
 680                 g_dhcp_client_set_send(dhcp_client, G_DHCP_VENDOR_CLASS_ID,
 681                                         vendor_class_id);
 682
 683         g_dhcp_client_register_event(dhcp_client,
 684                         G_DHCP_CLIENT_EVENT_LEASE_AVAILABLE,
 685                                                 lease_available_cb, dhcp);
 686
 687         g_dhcp_client_register_event(dhcp_client,
 688                         G_DHCP_CLIENT_EVENT_LEASE_LOST, lease_lost_cb, dhcp);
 689
 690         g_dhcp_client_register_event(dhcp_client,
 691                         G_DHCP_CLIENT_EVENT_NO_LEASE, no_lease_cb, dhcp);
 692
 693         dhcp->dhcp_client = dhcp_client;
 694
 695         return 0;
 696 }
 697
 698 static int dhcp_release(struct connman_dhcp *dhcp)
 699 {
 700         DBG("dhcp %p", dhcp);
 701
 702         if (dhcp->timeout > 0) {
 703                 g_source_remove(dhcp->timeout);
 704                 dhcp->timeout = 0;
 705         }
 706
 707         if (dhcp->dhcp_client) {
 708                 g_dhcp_client_stop(dhcp->dhcp_client);
 709                 g_dhcp_client_unref(dhcp->dhcp_client);
 710         }
 711
 712         dhcp->dhcp_client = NULL;
 713
 714         g_free(dhcp->dhcp_debug_prefix);
 715         dhcp->dhcp_debug_prefix = NULL;
 716
 717         ipv4ll_stop_client(dhcp);
 718
 719         return 0;
 720 }
 721
 722 char *__connman_dhcp_get_server_address(struct connman_ipconfig *ipconfig)
 723 {
 724         struct connman_dhcp *dhcp;
 725
 726         dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
 727         if (!dhcp)
 728                 return NULL;
 729
 730         return g_dhcp_client_get_server_address(dhcp->dhcp_client);
 731 }
 732
 733 int __connman_dhcp_start(struct connman_ipconfig *ipconfig,
 734                         struct connman_network *network, dhcp_cb callback,
 735                         gpointer user_data)
 736 {
 737 #if !defined TIZEN_EXT
 738         const char *last_addr = NULL;
 739 #endif
 740         struct connman_dhcp *dhcp;
 741         int err;
 742
 743         DBG("");
 744
 745         if (network) {
 746                 struct connman_service *service;
 747
 748                 service = connman_service_lookup_from_network(network);
 749                 if (!service)
 750                         return -EINVAL;
 751         }
 752
 753 #if !defined TIZEN_EXT
 754         last_addr = __connman_ipconfig_get_dhcp_address(ipconfig);
 755 #endif
 756
 757         dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
 758         if (!dhcp) {
 759
 760                 dhcp = g_try_new0(struct connman_dhcp, 1);
 761                 if (!dhcp)
 762                         return -ENOMEM;
 763
 764                 dhcp->ipconfig = ipconfig;
 765                 __connman_ipconfig_ref(ipconfig);
 766
 767                 if (network) {
 768                         dhcp->network = network;
 769                         connman_network_ref(network);
 770                 }
 771
 772                 err = dhcp_initialize(dhcp);
 773
 774                 if (err < 0) {
 775                         if (network)
 776                                 connman_network_unref(network);
 777                         g_free(dhcp);
 778                         return err;
 779                 }
 780
 781                 g_hash_table_insert(ipconfig_table, ipconfig, dhcp);
 782         }
 783
 784         dhcp->callback = callback;
 785         dhcp->user_data = user_data;
 786
 787 #if defined TIZEN_EXT
 788         DBG("Start DHCP with DHCPDISCOVER request");
 789
 790         return g_dhcp_client_start(dhcp->dhcp_client, NULL);
 791 #else
 792         return g_dhcp_client_start(dhcp->dhcp_client, last_addr);
 793 #endif
 794 }
 795
 796 void __connman_dhcp_stop(struct connman_ipconfig *ipconfig)
 797 {
 798         struct connman_dhcp *dhcp;
 799
 800         DBG("ipconfig_table %p ipconfig %p", ipconfig_table, ipconfig);
 801
 802         if (!ipconfig_table)
 803                 return;
 804
 805         dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
 806         if (dhcp) {
 807                 g_hash_table_remove(ipconfig_table, ipconfig);
 808                 __connman_ipconfig_unref(ipconfig);
 809                 if (dhcp->network)
 810                         connman_network_unref(dhcp->network);
 811                 dhcp_release(dhcp);
 812                 dhcp_invalidate(dhcp, false);
 813                 dhcp_free(dhcp);
 814         }
 815 }
 816
 817 int __connman_dhcp_init(void)
 818 {
 819         DBG("");
 820
 821         ipconfig_table = g_hash_table_new_full(g_direct_hash, g_direct_equal,
 822                                                                 NULL, NULL);
 823
 824         return 0;
 825 }
 826
 827 void __connman_dhcp_cleanup(void)
 828 {
 829         DBG("");
 830
 831         g_hash_table_destroy(ipconfig_table);
 832         ipconfig_table = NULL;
 833
 834         dhcp_cleanup_random();
 835 }