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
  30 #include <connman/ipconfig.h>
  31 #include <include/setting.h>
  32
  33 #include <gdhcp/gdhcp.h>
  34
  35 #include <glib.h>
  36
  37 #include "connman.h"
  38
  39 #define RATE_LIMIT_INTERVAL     60      /* delay between successive attempts */
  40
  41 struct connman_dhcp {
  42         struct connman_ipconfig *ipconfig;
  43         struct connman_network *network;
  44         dhcp_cb callback;
  45         gpointer user_data;
  46
  47         char **nameservers;
  48         char **timeservers;
  49         char *pac;
  50
  51         unsigned int timeout;
  52
  53         GDHCPClient *ipv4ll_client;
  54         GDHCPClient *dhcp_client;
  55         char *ipv4ll_debug_prefix;
  56         char *dhcp_debug_prefix;
  57 };
  58
  59 static GHashTable *ipconfig_table;
  60 static bool ipv4ll_running;
  61
  62 static void dhcp_free(struct connman_dhcp *dhcp)
  63 {
  64         g_strfreev(dhcp->nameservers);
  65         g_strfreev(dhcp->timeservers);
  66         g_free(dhcp->pac);
  67
  68         dhcp->nameservers = NULL;
  69         dhcp->timeservers = NULL;
  70         dhcp->pac = NULL;
  71
  72         g_free(dhcp);
  73 }
  74
  75 static void ipv4ll_stop_client(struct connman_dhcp *dhcp)
  76 {
  77         if (!dhcp->ipv4ll_client)
  78                 return;
  79
  80         g_dhcp_client_stop(dhcp->ipv4ll_client);
  81         g_dhcp_client_unref(dhcp->ipv4ll_client);
  82         dhcp->ipv4ll_client = NULL;
  83         ipv4ll_running = false;
  84
  85         g_free(dhcp->ipv4ll_debug_prefix);
  86         dhcp->ipv4ll_debug_prefix = NULL;
  87 }
  88
  89 static bool apply_dhcp_invalidate_on_network(struct connman_dhcp *dhcp)
  90 {
  91         struct connman_service *service;
  92         int i;
  93
  94         if (!dhcp->network)
  95                 return true;
  96
  97         service = connman_service_lookup_from_network(dhcp->network);
  98         if (!service) {
  99                 connman_error("Can not lookup service");
 100                 return false;
 101         }
 102
 103         __connman_service_set_domainname(service, NULL);
 104         __connman_ipconfig_set_proxy_autoconfig(dhcp->ipconfig, NULL);
 105
 106         if (dhcp->timeservers) {
 107                 for (i = 0; dhcp->timeservers[i]; i++) {
 108                         __connman_service_timeserver_remove(service,
 109                                                         dhcp->timeservers[i]);
 110                 }
 111         }
 112         if (dhcp->nameservers) {
 113                 for (i = 0; dhcp->nameservers[i]; i++) {
 114 #if defined TIZEN_EXT
 115                         __connman_service_nameserver_remove(service,
 116                                                 dhcp->nameservers[i], false,
 117                                                 CONNMAN_IPCONFIG_TYPE_IPV4);
 118 #else
 119                         __connman_service_nameserver_remove(service,
 120                                                 dhcp->nameservers[i], false);
 121 #endif
 122                 }
 123         }
 124
 125         return true;
 126 }
 127
 128 /**
 129  * dhcp_invalidate: Invalidate an existing DHCP lease
 130  * @dhcp: pointer to the DHCP lease to invalidate.
 131  * @callback: flag indicating whether or not to invoke the client callback
 132  *            if present.
 133  *
 134  * Invalidates an existing DHCP lease, optionally invoking the client
 135  * callback. The caller may wish to avoid the client callback invocation
 136  * when the invocation of that callback might otherwise unnecessarily upset
 137  * service state due to the IP configuration change implied by this
 138  * invalidation.
 139  */
 140 static void dhcp_invalidate(struct connman_dhcp *dhcp, bool callback)
 141 {
 142         DBG("dhcp %p callback %u", dhcp, callback);
 143
 144         if (!dhcp)
 145                 return;
 146
 147         __connman_6to4_remove(dhcp->ipconfig);
 148
 149         if (!apply_dhcp_invalidate_on_network(dhcp))
 150                 return;
 151
 152         __connman_ipconfig_set_dhcp_address(dhcp->ipconfig,
 153                                 __connman_ipconfig_get_local(dhcp->ipconfig));
 154         DBG("last address %s",
 155                         __connman_ipconfig_get_dhcp_address(dhcp->ipconfig));
 156
 157         __connman_ipconfig_address_remove(dhcp->ipconfig);
 158
 159         __connman_ipconfig_set_local(dhcp->ipconfig, NULL);
 160         __connman_ipconfig_set_broadcast(dhcp->ipconfig, NULL);
 161         __connman_ipconfig_set_gateway(dhcp->ipconfig, NULL);
 162         __connman_ipconfig_set_prefixlen(dhcp->ipconfig, 0);
 163
 164         if (dhcp->callback && callback)
 165                 dhcp->callback(dhcp->ipconfig, dhcp->network,
 166                                                 false, dhcp->user_data);
 167 }
 168
 169 static void dhcp_valid(struct connman_dhcp *dhcp)
 170 {
 171         if (dhcp->callback)
 172                 dhcp->callback(dhcp->ipconfig, dhcp->network,
 173                                                 true, dhcp->user_data);
 174 }
 175
 176 static void dhcp_debug(const char *str, void *data)
 177 {
 178         connman_info("%s: %s", (const char *) data, str);
 179 }
 180
 181 static void ipv4ll_lost_cb(GDHCPClient *dhcp_client, gpointer user_data);
 182 static void ipv4ll_available_cb(GDHCPClient *ipv4ll_client, gpointer user_data);
 183
 184 static int ipv4ll_start_client(struct connman_dhcp *dhcp)
 185 {
 186         GDHCPClient *ipv4ll_client;
 187         GDHCPClientError error;
 188         const char *hostname;
 189         int index;
 190         int err;
 191
 192         if (dhcp->ipv4ll_client)
 193                 return -EALREADY;
 194
 195         index = __connman_ipconfig_get_index(dhcp->ipconfig);
 196
 197         ipv4ll_client = g_dhcp_client_new(G_DHCP_IPV4LL, index, &error);
 198         if (error != G_DHCP_CLIENT_ERROR_NONE)
 199                 return -EINVAL;
 200
 201 #if !defined TIZEN_EXT
 202         if (getenv("CONNMAN_DHCP_DEBUG")) {
 203 #endif
 204                 dhcp->ipv4ll_debug_prefix = g_strdup_printf("IPv4LL index %d",
 205                                                         index);
 206                 g_dhcp_client_set_debug(ipv4ll_client, dhcp_debug,
 207                                         dhcp->ipv4ll_debug_prefix);
 208 #if !defined TIZEN_EXT
 209         }
 210 #endif
 211
 212         g_dhcp_client_set_id(ipv4ll_client);
 213
 214         if (dhcp->network) {
 215                 hostname = connman_utsname_get_hostname();
 216                 if (hostname)
 217                         g_dhcp_client_set_send(ipv4ll_client,
 218                                                 G_DHCP_HOST_NAME, hostname);
 219         }
 220
 221         g_dhcp_client_register_event(ipv4ll_client,
 222                         G_DHCP_CLIENT_EVENT_IPV4LL_LOST, ipv4ll_lost_cb, dhcp);
 223
 224         g_dhcp_client_register_event(ipv4ll_client,
 225                         G_DHCP_CLIENT_EVENT_IPV4LL_AVAILABLE,
 226                                                 ipv4ll_available_cb, dhcp);
 227
 228         dhcp->ipv4ll_client = ipv4ll_client;
 229
 230         err = g_dhcp_client_start(dhcp->ipv4ll_client, NULL);
 231         if (err < 0) {
 232                 ipv4ll_stop_client(dhcp);
 233                 return err;
 234         }
 235
 236         ipv4ll_running = true;
 237         return 0;
 238 }
 239
 240 static gboolean dhcp_retry_cb(gpointer user_data)
 241 {
 242         struct connman_dhcp *dhcp = user_data;
 243
 244         dhcp->timeout = 0;
 245
 246         g_dhcp_client_start(dhcp->dhcp_client,
 247                         __connman_ipconfig_get_dhcp_address(dhcp->ipconfig));
 248
 249         return FALSE;
 250 }
 251
 252 static void no_lease_cb(GDHCPClient *dhcp_client, gpointer user_data)
 253 {
 254         struct connman_dhcp *dhcp = user_data;
 255         int err;
 256
 257         DBG("No lease available ipv4ll %d client %p", ipv4ll_running,
 258                 dhcp->ipv4ll_client);
 259
 260         if (dhcp->timeout > 0)
 261                 g_source_remove(dhcp->timeout);
 262
 263         dhcp->timeout = g_timeout_add_seconds(RATE_LIMIT_INTERVAL,
 264                         dhcp_retry_cb,
 265                         dhcp);
 266         if (ipv4ll_running)
 267                 return;
 268
 269         err = ipv4ll_start_client(dhcp);
 270         if (err < 0)
 271                 DBG("Cannot start ipv4ll client (%d/%s)", err, strerror(-err));
 272
 273         /* Only notify upper layer if we have a problem */
 274         dhcp_invalidate(dhcp, !ipv4ll_running);
 275 }
 276
 277 static void lease_lost_cb(GDHCPClient *dhcp_client, gpointer user_data)
 278 {
 279         struct connman_dhcp *dhcp = user_data;
 280
 281         DBG("Lease lost");
 282
 283         /* Upper layer will decide what to do, e.g. nothing or retry. */
 284         dhcp_invalidate(dhcp, true);
 285 }
 286
 287 static void ipv4ll_lost_cb(GDHCPClient *dhcp_client, gpointer user_data)
 288 {
 289         struct connman_dhcp *dhcp = user_data;
 290
 291         DBG("Lease lost");
 292
 293         ipv4ll_stop_client(dhcp);
 294
 295         /*
 296          * Since we lost our IPv4LL configuration we might as notify
 297          * the upper layers.
 298          */
 299         dhcp_invalidate(dhcp, true);
 300 }
 301
 302 static bool compare_string_arrays(char **array_a, char **array_b)
 303 {
 304         int i;
 305
 306         if (!array_a || !array_b)
 307                 return false;
 308
 309         if (g_strv_length(array_a) != g_strv_length(array_b))
 310                 return false;
 311
 312         for (i = 0; array_a[i] &&
 313                              array_b[i]; i++) {
 314                 if (g_strcmp0(array_a[i], array_b[i]) != 0)
 315                         return false;
 316         }
 317
 318         return true;
 319 }
 320
 321 static bool apply_lease_available_on_network(GDHCPClient *dhcp_client,
 322                                                 struct connman_dhcp *dhcp)
 323 {
 324         char **nameservers, **timeservers, *pac = NULL;
 325         struct connman_service *service;
 326         GList *list, *option = NULL;
 327         int ns_entries;
 328         int i;
 329
 330         if (!dhcp->network)
 331                 return true;
 332
 333         service = connman_service_lookup_from_network(dhcp->network);
 334         if (!service) {
 335                 connman_error("Can not lookup service");
 336                 return false;
 337         }
 338
 339         option = g_dhcp_client_get_option(dhcp_client, 252);
 340         if (option)
 341                 pac = g_strdup(option->data);
 342
 343         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_DNS_SERVER);
 344         ns_entries = g_list_length(option);
 345         nameservers = g_try_new0(char *, ns_entries + 1);
 346         if (nameservers) {
 347                 for (i = 0, list = option;list; list = list->next, i++)
 348                         nameservers[i] = g_strdup(list->data);
 349                 nameservers[ns_entries] = NULL;
 350         }
 351
 352         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_DOMAIN_NAME);
 353         if (option)
 354                 __connman_service_set_domainname(service, option->data);
 355
 356         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_HOST_NAME);
 357         if (option)
 358                 __connman_service_set_hostname(service, option->data);
 359
 360         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_NTP_SERVER);
 361         ns_entries = g_list_length(option);
 362         timeservers = g_try_new0(char *, ns_entries + 1);
 363         if (timeservers) {
 364                 for (i = 0, list = option; list; list = list->next, i++)
 365                         timeservers[i] = g_strdup(list->data);
 366                 timeservers[ns_entries] = NULL;
 367         }
 368
 369         if (!compare_string_arrays(nameservers, dhcp->nameservers)) {
 370                 if (dhcp->nameservers) {
 371 #if defined TIZEN_EXT
 372                         for (i = 0; dhcp->nameservers[i] != NULL; i++) {
 373                                 __connman_service_nameserver_remove(service,
 374                                                 dhcp->nameservers[i], false,
 375                                                 CONNMAN_IPCONFIG_TYPE_IPV4);
 376                         }
 377 #else
 378                         for (i = 0; dhcp->nameservers[i]; i++) {
 379                                 __connman_service_nameserver_remove(service,
 380                                                 dhcp->nameservers[i], false);
 381                         }
 382 #endif
 383                         g_strfreev(dhcp->nameservers);
 384                 }
 385
 386                 dhcp->nameservers = nameservers;
 387
 388                 for (i = 0; dhcp->nameservers && dhcp->nameservers[i]; i++) {
 389 #if defined TIZEN_EXT
 390                         __connman_service_nameserver_append(service,
 391                                                 dhcp->nameservers[i], false,
 392                                                 CONNMAN_IPCONFIG_TYPE_IPV4);
 393 #else
 394                         __connman_service_nameserver_append(service,
 395                                                 dhcp->nameservers[i], false);
 396 #endif
 397                 }
 398         } else {
 399                 g_strfreev(nameservers);
 400         }
 401
 402         if (!compare_string_arrays(timeservers, dhcp->timeservers)) {
 403                 if (dhcp->timeservers) {
 404                         for (i = 0; dhcp->timeservers[i]; i++) {
 405                                 __connman_service_timeserver_remove(service,
 406                                                         dhcp->timeservers[i]);
 407                         }
 408                         g_strfreev(dhcp->timeservers);
 409                 }
 410
 411                 dhcp->timeservers = timeservers;
 412
 413                 for (i = 0; dhcp->timeservers && dhcp->timeservers[i]; i++) {
 414                         __connman_service_timeserver_append(service,
 415                                                         dhcp->timeservers[i]);
 416                 }
 417         } else {
 418                 g_strfreev(timeservers);
 419         }
 420
 421         if (g_strcmp0(pac, dhcp->pac) != 0) {
 422                 g_free(dhcp->pac);
 423                 dhcp->pac = pac;
 424
 425                 __connman_ipconfig_set_proxy_autoconfig(dhcp->ipconfig,
 426                                                                 dhcp->pac);
 427         }
 428
 429         if (connman_setting_get_bool("Enable6to4"))
 430                 __connman_6to4_probe(service);
 431
 432         return true;
 433 }
 434
 435 static void lease_available_cb(GDHCPClient *dhcp_client, gpointer user_data)
 436 {
 437         struct connman_dhcp *dhcp = user_data;
 438         GList *option = NULL;
 439         char *address, *netmask = NULL, *gateway = NULL;
 440         const char *c_address, *c_gateway;
 441         unsigned char prefixlen, c_prefixlen;
 442         bool ip_change = false;
 443
 444         DBG("Lease available");
 445
 446         if (dhcp->ipv4ll_client) {
 447                 ipv4ll_stop_client(dhcp);
 448                 dhcp_invalidate(dhcp, false);
 449         }
 450
 451         c_address = __connman_ipconfig_get_local(dhcp->ipconfig);
 452         c_gateway = __connman_ipconfig_get_gateway(dhcp->ipconfig);
 453         c_prefixlen = __connman_ipconfig_get_prefixlen(dhcp->ipconfig);
 454
 455         address = g_dhcp_client_get_address(dhcp_client);
 456
 457         __connman_ipconfig_set_dhcp_address(dhcp->ipconfig, address);
 458         DBG("last address %s", address);
 459
 460         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_SUBNET);
 461         if (option)
 462                 netmask = g_strdup(option->data);
 463
 464         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_ROUTER);
 465         if (option)
 466                 gateway = g_strdup(option->data);
 467
 468         prefixlen = connman_ipaddress_calc_netmask_len(netmask);
 469         if (prefixlen == 255)
 470                 connman_warn("netmask: %s is invalid", netmask);
 471
 472         DBG("c_address %s", c_address);
 473
 474         if (g_strcmp0(address, c_address)) {
 475                 ip_change = true;
 476                 if (c_address) {
 477                         /* Remove old ip address */
 478                         __connman_ipconfig_address_remove(dhcp->ipconfig);
 479                 }
 480         }
 481         if (g_strcmp0(gateway, c_gateway)) {
 482                 ip_change = true;
 483                 if (c_gateway) {
 484                         /* Remove gateway ip address */
 485                         __connman_ipconfig_gateway_remove(dhcp->ipconfig);
 486                 }
 487         } else if (prefixlen != c_prefixlen)
 488                 ip_change = true;
 489
 490         __connman_ipconfig_set_method(dhcp->ipconfig,
 491                                                 CONNMAN_IPCONFIG_METHOD_DHCP);
 492         if (ip_change) {
 493                 __connman_ipconfig_set_local(dhcp->ipconfig, address);
 494                 __connman_ipconfig_set_prefixlen(dhcp->ipconfig, prefixlen);
 495                 __connman_ipconfig_set_gateway(dhcp->ipconfig, gateway);
 496         }
 497
 498         if (!apply_lease_available_on_network(dhcp_client, dhcp))
 499                 goto done;
 500
 501         if (ip_change)
 502                 dhcp_valid(dhcp);
 503
 504 done:
 505         g_free(address);
 506         g_free(netmask);
 507         g_free(gateway);
 508 }
 509
 510 static void ipv4ll_available_cb(GDHCPClient *ipv4ll_client, gpointer user_data)
 511 {
 512         struct connman_dhcp *dhcp = user_data;
 513                 char *address, *netmask;
 514                 unsigned char prefixlen;
 515
 516         DBG("IPV4LL available");
 517
 518         address = g_dhcp_client_get_address(ipv4ll_client);
 519         netmask = g_dhcp_client_get_netmask(ipv4ll_client);
 520
 521         prefixlen = connman_ipaddress_calc_netmask_len(netmask);
 522
 523         __connman_ipconfig_set_method(dhcp->ipconfig,
 524                                                 CONNMAN_IPCONFIG_METHOD_DHCP);
 525         __connman_ipconfig_set_local(dhcp->ipconfig, address);
 526         __connman_ipconfig_set_prefixlen(dhcp->ipconfig, prefixlen);
 527         __connman_ipconfig_set_gateway(dhcp->ipconfig, NULL);
 528
 529         dhcp_valid(dhcp);
 530
 531         g_free(address);
 532         g_free(netmask);
 533 }
 534
 535 static int dhcp_initialize(struct connman_dhcp *dhcp)
 536 {
 537         GDHCPClient *dhcp_client;
 538         GDHCPClientError error;
 539         int index;
 540
 541         DBG("dhcp %p", dhcp);
 542
 543         index = __connman_ipconfig_get_index(dhcp->ipconfig);
 544
 545         dhcp_client = g_dhcp_client_new(G_DHCP_IPV4, index, &error);
 546         if (error != G_DHCP_CLIENT_ERROR_NONE)
 547 #if defined TIZEN_EXT
 548         {
 549                 DBG("failed g_dhcp_client_new(%d), index(%d)", error, index);
 550 #endif
 551                 return -EINVAL;
 552 #if defined TIZEN_EXT
 553         }
 554 #endif
 555
 556 #if !defined TIZEN_EXT
 557         if (getenv("CONNMAN_DHCP_DEBUG")) {
 558 #endif
 559                 dhcp->dhcp_debug_prefix = g_strdup_printf("DHCP index %d",
 560                                                         index);
 561                 g_dhcp_client_set_debug(dhcp_client, dhcp_debug,
 562                                         dhcp->dhcp_debug_prefix);
 563 #if !defined TIZEN_EXT
 564         }
 565 #endif
 566
 567         g_dhcp_client_set_id(dhcp_client);
 568
 569         if (dhcp->network) {
 570                 struct connman_service *service;
 571                 const char *hostname;
 572
 573                 service = connman_service_lookup_from_network(dhcp->network);
 574
 575                 hostname = __connman_service_get_hostname(service);
 576                 if (!hostname)
 577                         hostname = connman_utsname_get_hostname();
 578
 579                 if (hostname)
 580                         g_dhcp_client_set_send(dhcp_client,
 581                                                 G_DHCP_HOST_NAME, hostname);
 582
 583                 g_dhcp_client_set_request(dhcp_client, G_DHCP_HOST_NAME);
 584                 g_dhcp_client_set_request(dhcp_client, G_DHCP_DNS_SERVER);
 585                 g_dhcp_client_set_request(dhcp_client, G_DHCP_DOMAIN_NAME);
 586                 g_dhcp_client_set_request(dhcp_client, G_DHCP_NTP_SERVER);
 587                 g_dhcp_client_set_request(dhcp_client, 252);
 588         }
 589
 590         g_dhcp_client_set_request(dhcp_client, G_DHCP_SUBNET);
 591         g_dhcp_client_set_request(dhcp_client, G_DHCP_ROUTER);
 592
 593         g_dhcp_client_register_event(dhcp_client,
 594                         G_DHCP_CLIENT_EVENT_LEASE_AVAILABLE,
 595                                                 lease_available_cb, dhcp);
 596
 597         g_dhcp_client_register_event(dhcp_client,
 598                         G_DHCP_CLIENT_EVENT_LEASE_LOST, lease_lost_cb, dhcp);
 599
 600         g_dhcp_client_register_event(dhcp_client,
 601                         G_DHCP_CLIENT_EVENT_NO_LEASE, no_lease_cb, dhcp);
 602
 603         dhcp->dhcp_client = dhcp_client;
 604
 605         return 0;
 606 }
 607
 608 static int dhcp_release(struct connman_dhcp *dhcp)
 609 {
 610         DBG("dhcp %p", dhcp);
 611
 612         if (dhcp->timeout > 0) {
 613                 g_source_remove(dhcp->timeout);
 614                 dhcp->timeout = 0;
 615         }
 616
 617         if (dhcp->dhcp_client) {
 618                 g_dhcp_client_stop(dhcp->dhcp_client);
 619                 g_dhcp_client_unref(dhcp->dhcp_client);
 620         }
 621
 622         dhcp->dhcp_client = NULL;
 623
 624         g_free(dhcp->dhcp_debug_prefix);
 625         dhcp->dhcp_debug_prefix = NULL;
 626
 627         ipv4ll_stop_client(dhcp);
 628
 629         return 0;
 630 }
 631
 632 char *__connman_dhcp_get_server_address(struct connman_ipconfig *ipconfig)
 633 {
 634         struct connman_dhcp *dhcp;
 635
 636         dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
 637         if (!dhcp)
 638                 return NULL;
 639
 640         return g_dhcp_client_get_server_address(dhcp->dhcp_client);
 641 }
 642
 643 int __connman_dhcp_start(struct connman_ipconfig *ipconfig,
 644                         struct connman_network *network, dhcp_cb callback,
 645                         gpointer user_data)
 646 {
 647 #if !defined TIZEN_EXT
 648         const char *last_addr = NULL;
 649 #endif
 650         struct connman_dhcp *dhcp;
 651         int err;
 652
 653         DBG("");
 654
 655         if (network) {
 656                 struct connman_service *service;
 657
 658                 service = connman_service_lookup_from_network(network);
 659                 if (!service)
 660                         return -EINVAL;
 661         }
 662
 663 #if !defined TIZEN_EXT
 664         last_addr = __connman_ipconfig_get_dhcp_address(ipconfig);
 665 #endif
 666
 667         dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
 668         if (!dhcp) {
 669
 670                 dhcp = g_try_new0(struct connman_dhcp, 1);
 671                 if (!dhcp)
 672                         return -ENOMEM;
 673
 674                 dhcp->ipconfig = ipconfig;
 675                 __connman_ipconfig_ref(ipconfig);
 676
 677                 if (network) {
 678                         dhcp->network = network;
 679                         connman_network_ref(network);
 680                 }
 681
 682                 err = dhcp_initialize(dhcp);
 683
 684                 if (err < 0) {
 685                         if (network)
 686                                 connman_network_unref(network);
 687                         g_free(dhcp);
 688                         return err;
 689                 }
 690
 691                 g_hash_table_insert(ipconfig_table, ipconfig, dhcp);
 692         }
 693
 694         dhcp->callback = callback;
 695         dhcp->user_data = user_data;
 696
 697 #if defined TIZEN_EXT
 698         DBG("Start DHCP with DHCPDISCOVER request");
 699
 700         return g_dhcp_client_start(dhcp->dhcp_client, NULL);
 701 #else
 702         return g_dhcp_client_start(dhcp->dhcp_client, last_addr);
 703 #endif
 704
 705 }
 706
 707 void __connman_dhcp_stop(struct connman_ipconfig *ipconfig)
 708 {
 709         struct connman_dhcp *dhcp;
 710
 711         DBG("ipconfig_table %p ipconfig %p", ipconfig_table, ipconfig);
 712
 713         if (!ipconfig_table)
 714                 return;
 715
 716         dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
 717         if (dhcp) {
 718                 g_hash_table_remove(ipconfig_table, ipconfig);
 719                 __connman_ipconfig_unref(ipconfig);
 720                 if (dhcp->network)
 721                         connman_network_unref(dhcp->network);
 722                 dhcp_release(dhcp);
 723                 dhcp_invalidate(dhcp, false);
 724                 dhcp_free(dhcp);
 725         }
 726 }
 727
 728 int __connman_dhcp_init(void)
 729 {
 730         DBG("");
 731
 732         ipconfig_table = g_hash_table_new_full(g_direct_hash, g_direct_equal,
 733                                                                 NULL, NULL);
 734
 735         return 0;
 736 }
 737
 738 void __connman_dhcp_cleanup(void)
 739 {
 740         DBG("");
 741
 742         g_hash_table_destroy(ipconfig_table);
 743         ipconfig_table = NULL;
 744
 745         dhcp_cleanup_random();
 746 }