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 #if defined TIZEN_EXT
  47 #define DHCP_SUCCESS            "DHCP_SUCCESS"
  48 #define DHCP_FAIL               "DHCP_FAIL"
  49 #define DHCP_STARTED            "DHCP_STARTED"
  50 #endif
  51
  52 struct connman_dhcp {
  53         struct connman_ipconfig *ipconfig;
  54         struct connman_network *network;
  55         dhcp_cb callback;
  56         gpointer user_data;
  57
  58         char **nameservers;
  59         char **timeservers;
  60         char *pac;
  61
  62         unsigned int timeout;
  63
  64         GDHCPClient *ipv4ll_client;
  65         GDHCPClient *dhcp_client;
  66         char *ipv4ll_debug_prefix;
  67         char *dhcp_debug_prefix;
  68
  69         bool ipv4ll_running;
  70 };
  71
  72 static GHashTable *ipconfig_table;
  73
  74 static void dhcp_free(struct connman_dhcp *dhcp)
  75 {
  76 #if defined TIZEN_EXT
  77         DBG("dhcp_free [%p]", dhcp);
  78 #endif
  79         g_strfreev(dhcp->nameservers);
  80         g_strfreev(dhcp->timeservers);
  81         g_free(dhcp->pac);
  82
  83         dhcp->nameservers = NULL;
  84         dhcp->timeservers = NULL;
  85         dhcp->pac = NULL;
  86
  87         g_free(dhcp);
  88 #if defined TIZEN_EXT
  89         dhcp = NULL;
  90 #endif
  91 }
  92
  93 static void ipv4ll_stop_client(struct connman_dhcp *dhcp)
  94 {
  95 #if defined TIZEN_EXT
  96         DBG("dhcp [%p] ipv4ll_client [%p]", dhcp, dhcp->ipv4ll_client);
  97 #endif
  98         if (!dhcp->ipv4ll_client)
  99                 return;
 100
 101         g_dhcp_client_stop(dhcp->ipv4ll_client);
 102         g_dhcp_client_unref(dhcp->ipv4ll_client);
 103         dhcp->ipv4ll_client = NULL;
 104         dhcp->ipv4ll_running = false;
 105
 106         g_free(dhcp->ipv4ll_debug_prefix);
 107         dhcp->ipv4ll_debug_prefix = NULL;
 108 }
 109
 110 static bool apply_dhcp_invalidate_on_network(struct connman_dhcp *dhcp)
 111 {
 112         struct connman_service *service;
 113         int i;
 114
 115         if (!dhcp->network)
 116                 return true;
 117
 118         service = connman_service_lookup_from_network(dhcp->network);
 119         if (!service) {
 120                 connman_error("Can not lookup service");
 121                 return false;
 122         }
 123
 124         __connman_service_set_domainname(service, NULL);
 125         __connman_ipconfig_set_proxy_autoconfig(dhcp->ipconfig, NULL);
 126
 127         if (dhcp->timeservers) {
 128                 for (i = 0; dhcp->timeservers[i]; i++) {
 129                         __connman_service_timeserver_remove(service,
 130                                                         dhcp->timeservers[i]);
 131                 }
 132                 g_strfreev(dhcp->timeservers);
 133                 dhcp->timeservers = NULL;
 134         }
 135         if (dhcp->nameservers) {
 136                 for (i = 0; dhcp->nameservers[i]; i++) {
 137 #if defined TIZEN_EXT
 138                         __connman_service_nameserver_remove(service,
 139                                         dhcp->nameservers[i], false,
 140                                         CONNMAN_IPCONFIG_TYPE_IPV4);
 141 #else
 142                         __connman_service_nameserver_remove(service,
 143                                                 dhcp->nameservers[i], false);
 144 #endif
 145                 }
 146                 g_strfreev(dhcp->nameservers);
 147                 dhcp->nameservers = NULL;
 148         }
 149
 150         return true;
 151 }
 152
 153 /**
 154  * dhcp_invalidate: Invalidate an existing DHCP lease
 155  * @dhcp: pointer to the DHCP lease to invalidate.
 156  * @callback: flag indicating whether or not to invoke the client callback
 157  *            if present.
 158  *
 159  * Invalidates an existing DHCP lease, optionally invoking the client
 160  * callback. The caller may wish to avoid the client callback invocation
 161  * when the invocation of that callback might otherwise unnecessarily upset
 162  * service state due to the IP configuration change implied by this
 163  * invalidation.
 164  */
 165 static void dhcp_invalidate(struct connman_dhcp *dhcp, bool callback)
 166 {
 167         DBG("dhcp %p callback %u", dhcp, callback);
 168
 169         if (!dhcp)
 170                 return;
 171
 172         __connman_6to4_remove(dhcp->ipconfig);
 173
 174         if (!apply_dhcp_invalidate_on_network(dhcp))
 175                 return;
 176
 177         __connman_ipconfig_set_dhcp_address(dhcp->ipconfig,
 178                                 __connman_ipconfig_get_local(dhcp->ipconfig));
 179         DBG("last address %s",
 180                         __connman_ipconfig_get_dhcp_address(dhcp->ipconfig));
 181
 182         __connman_ipconfig_address_remove(dhcp->ipconfig);
 183
 184         __connman_ipconfig_set_local(dhcp->ipconfig, NULL);
 185         __connman_ipconfig_set_broadcast(dhcp->ipconfig, NULL);
 186         __connman_ipconfig_set_gateway(dhcp->ipconfig, NULL);
 187 #if defined TIZEN_EXT
 188         __connman_ipconfig_set_dhcp_vsie(dhcp->ipconfig, NULL);
 189 #endif
 190         __connman_ipconfig_set_prefixlen(dhcp->ipconfig, 0);
 191
 192         if (dhcp->callback && callback)
 193                 dhcp->callback(dhcp->ipconfig, dhcp->network,
 194                                                 false, dhcp->user_data);
 195 }
 196
 197 static void dhcp_valid(struct connman_dhcp *dhcp)
 198 {
 199         if (dhcp->callback)
 200                 dhcp->callback(dhcp->ipconfig, dhcp->network,
 201                                                 true, dhcp->user_data);
 202 }
 203
 204 static void dhcp_debug(const char *str, void *data)
 205 {
 206         connman_info("%s: %s", (const char *) data, str);
 207 }
 208
 209 static void ipv4ll_lost_cb(GDHCPClient *dhcp_client, gpointer user_data);
 210 static void ipv4ll_available_cb(GDHCPClient *ipv4ll_client, gpointer user_data);
 211
 212 static int ipv4ll_start_client(struct connman_dhcp *dhcp)
 213 {
 214         GDHCPClient *ipv4ll_client;
 215         GDHCPClientError error;
 216         const char *hostname;
 217         int index;
 218         int err;
 219
 220 #if defined TIZEN_EXT
 221         DBG("dhcp %p", dhcp);
 222 #endif
 223
 224         if (dhcp->ipv4ll_client)
 225                 return -EALREADY;
 226
 227         index = __connman_ipconfig_get_index(dhcp->ipconfig);
 228
 229         ipv4ll_client = g_dhcp_client_new(G_DHCP_IPV4LL, index, &error);
 230         if (error != G_DHCP_CLIENT_ERROR_NONE)
 231                 return -EINVAL;
 232
 233 #if !defined TIZEN_EXT
 234         if (getenv("CONNMAN_DHCP_DEBUG")) {
 235 #endif
 236                 dhcp->ipv4ll_debug_prefix = g_strdup_printf("IPv4LL index %d",
 237                                                         index);
 238                 g_dhcp_client_set_debug(ipv4ll_client, dhcp_debug,
 239                                         dhcp->ipv4ll_debug_prefix);
 240 #if !defined TIZEN_EXT
 241         }
 242 #endif
 243
 244         g_dhcp_client_set_id(ipv4ll_client);
 245
 246         if (dhcp->network) {
 247                 hostname = connman_utsname_get_hostname();
 248                 if (hostname)
 249                         g_dhcp_client_set_send(ipv4ll_client,
 250                                                 G_DHCP_HOST_NAME, hostname);
 251         }
 252
 253         g_dhcp_client_register_event(ipv4ll_client,
 254                         G_DHCP_CLIENT_EVENT_IPV4LL_LOST, ipv4ll_lost_cb, dhcp);
 255
 256         g_dhcp_client_register_event(ipv4ll_client,
 257                         G_DHCP_CLIENT_EVENT_IPV4LL_AVAILABLE,
 258                                                 ipv4ll_available_cb, dhcp);
 259
 260         dhcp->ipv4ll_client = ipv4ll_client;
 261
 262         err = g_dhcp_client_start(dhcp->ipv4ll_client, NULL);
 263         if (err < 0) {
 264                 ipv4ll_stop_client(dhcp);
 265                 return err;
 266         }
 267
 268         dhcp->ipv4ll_running = true;
 269         return 0;
 270 }
 271
 272 static gboolean dhcp_retry_cb(gpointer user_data)
 273 {
 274         struct connman_dhcp *dhcp = user_data;
 275
 276         dhcp->timeout = 0;
 277
 278 #if defined TIZEN_EXT
 279         DBG("dhcp %p", dhcp);
 280         DBG("dhcp->timeout %d", dhcp->timeout);
 281 #endif
 282         g_dhcp_client_start(dhcp->dhcp_client,
 283                         __connman_ipconfig_get_dhcp_address(dhcp->ipconfig));
 284
 285         return FALSE;
 286 }
 287
 288 static void no_lease_cb(GDHCPClient *dhcp_client, gpointer user_data)
 289 {
 290         struct connman_dhcp *dhcp = user_data;
 291         int err;
 292
 293         DBG("No lease available ipv4ll %d client %p", dhcp->ipv4ll_running,
 294                 dhcp->ipv4ll_client);
 295
 296 #if defined TIZEN_EXT
 297         if (dhcp->network &&
 298                         connman_network_get_bool(dhcp->network, "WiFi.RoamingDHCP")) {
 299
 300                 connman_network_set_bool(dhcp->network, "WiFi.RoamingDHCP", false);
 301                 __connman_network_enable_ipconfig(dhcp->network, dhcp->ipconfig);
 302                 __connman_network_notify_dhcp_changed(DHCP_FAIL,
 303                                         g_dhcp_client_get_interface(dhcp_client));
 304
 305                 return;
 306         }
 307
 308         if (connman_setting_get_bool("EnableAutoIp") == false) {
 309                 DBG("link-local address autoconfiguration is disabled.");
 310
 311                 if (dhcp->network) {
 312                         DBG("[DHCP-C] auto ip is not used, set dhcp-fail error and disconnect");
 313                         __connman_network_notify_dhcp_changed(DHCP_FAIL,
 314                                                 g_dhcp_client_get_interface(dhcp_client));
 315                         connman_network_set_error(dhcp->network, CONNMAN_NETWORK_ERROR_DHCP_FAIL);
 316                 }
 317                 return;
 318         }
 319 #endif
 320         if (dhcp->timeout > 0)
 321                 g_source_remove(dhcp->timeout);
 322
 323         dhcp->timeout = g_timeout_add_seconds(RATE_LIMIT_INTERVAL,
 324                                                 dhcp_retry_cb,
 325                                                 dhcp);
 326         if (dhcp->ipv4ll_running)
 327                 return;
 328
 329         err = ipv4ll_start_client(dhcp);
 330         if (err < 0)
 331                 DBG("Cannot start ipv4ll client (%d/%s)", err, strerror(-err));
 332
 333         /* Only notify upper layer if we have a problem */
 334         dhcp_invalidate(dhcp, !dhcp->ipv4ll_running);
 335 }
 336
 337 static void lease_lost_cb(GDHCPClient *dhcp_client, gpointer user_data)
 338 {
 339         struct connman_dhcp *dhcp = user_data;
 340
 341         DBG("Lease lost");
 342
 343         /* Upper layer will decide what to do, e.g. nothing or retry. */
 344         dhcp_invalidate(dhcp, true);
 345 }
 346
 347 static void ipv4ll_lost_cb(GDHCPClient *dhcp_client, gpointer user_data)
 348 {
 349         struct connman_dhcp *dhcp = user_data;
 350
 351         DBG("Lease lost");
 352
 353         ipv4ll_stop_client(dhcp);
 354
 355         /*
 356          * Since we lost our IPv4LL configuration we might as notify
 357          * the upper layers.
 358          */
 359         dhcp_invalidate(dhcp, true);
 360 }
 361
 362 static bool compare_string_arrays(char **array_a, char **array_b)
 363 {
 364         int i;
 365
 366         if (!array_a || !array_b)
 367                 return false;
 368
 369         if (g_strv_length(array_a) != g_strv_length(array_b))
 370                 return false;
 371
 372         for (i = 0; array_a[i] &&
 373                              array_b[i]; i++) {
 374                 if (g_strcmp0(array_a[i], array_b[i]) != 0)
 375                         return false;
 376         }
 377
 378         return true;
 379 }
 380
 381 static bool apply_lease_available_on_network(GDHCPClient *dhcp_client,
 382                                                 struct connman_dhcp *dhcp)
 383 {
 384         char **nameservers, **timeservers, *pac = NULL;
 385         struct connman_service *service;
 386         GList *list, *option = NULL;
 387         int ns_entries;
 388         int i;
 389
 390         if (!dhcp->network)
 391                 return true;
 392
 393         service = connman_service_lookup_from_network(dhcp->network);
 394         if (!service) {
 395                 connman_error("Can not lookup service");
 396                 return false;
 397         }
 398
 399         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_MTU);
 400         if (option && option->data) {
 401                 int mtu, index, err;
 402
 403                 mtu = atoi(option->data);
 404
 405                 if (mtu >= IPV6_MIN_MTU && mtu <= ETH_DATA_LEN) {
 406                         index = __connman_ipconfig_get_index(dhcp->ipconfig);
 407                         err = connman_inet_set_mtu(index, mtu);
 408
 409                         DBG("MTU %d index %d err %d", mtu, index, err);
 410                 }
 411         }
 412
 413         option = g_dhcp_client_get_option(dhcp_client, 252);
 414         if (option)
 415                 pac = g_strdup(option->data);
 416
 417         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_DNS_SERVER);
 418         ns_entries = g_list_length(option);
 419         nameservers = g_try_new0(char *, ns_entries + 1);
 420         if (nameservers) {
 421                 for (i = 0, list = option;list; list = list->next, i++)
 422                         nameservers[i] = g_strdup(list->data);
 423                 nameservers[ns_entries] = NULL;
 424         }
 425
 426         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_DOMAIN_NAME);
 427         if (option)
 428                 __connman_service_set_domainname(service, option->data);
 429
 430         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_HOST_NAME);
 431         if (option)
 432                 __connman_service_set_hostname(service, option->data);
 433
 434 #if defined TIZEN_EXT
 435         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_VENDOR_SPECIFIC_IE);
 436         if (option)
 437                 __connman_ipconfig_set_dhcp_vsie(dhcp->ipconfig, option->data);
 438 #endif
 439
 440         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_NTP_SERVER);
 441         ns_entries = g_list_length(option);
 442         timeservers = g_try_new0(char *, ns_entries + 1);
 443         if (timeservers) {
 444                 for (i = 0, list = option; list; list = list->next, i++)
 445                         timeservers[i] = g_strdup(list->data);
 446                 timeservers[ns_entries] = NULL;
 447         }
 448
 449         if (!compare_string_arrays(nameservers, dhcp->nameservers)) {
 450                 if (dhcp->nameservers) {
 451 #if defined TIZEN_EXT
 452                         for (i = 0; dhcp->nameservers[i] != NULL; i++) {
 453                                 __connman_service_nameserver_remove(service,
 454                                                 dhcp->nameservers[i], false,
 455                                                 CONNMAN_IPCONFIG_TYPE_IPV4);
 456                         }
 457 #else
 458                         for (i = 0; dhcp->nameservers[i]; i++) {
 459                                 __connman_service_nameserver_remove(service,
 460                                                 dhcp->nameservers[i], false);
 461                         }
 462 #endif
 463                         g_strfreev(dhcp->nameservers);
 464                 }
 465
 466                 dhcp->nameservers = nameservers;
 467
 468                 for (i = 0; dhcp->nameservers && dhcp->nameservers[i]; i++) {
 469 #if defined TIZEN_EXT
 470                         __connman_service_nameserver_append(service,
 471                                                 dhcp->nameservers[i], false,
 472                                                 CONNMAN_IPCONFIG_TYPE_IPV4);
 473 #else
 474                         __connman_service_nameserver_append(service,
 475                                                 dhcp->nameservers[i], false);
 476 #endif
 477                 }
 478         } else {
 479                 g_strfreev(nameservers);
 480         }
 481
 482         if (!compare_string_arrays(timeservers, dhcp->timeservers)) {
 483                 if (dhcp->timeservers) {
 484                         for (i = 0; dhcp->timeservers[i]; i++) {
 485                                 __connman_service_timeserver_remove(service,
 486                                                         dhcp->timeservers[i]);
 487                         }
 488                         g_strfreev(dhcp->timeservers);
 489                 }
 490
 491                 dhcp->timeservers = timeservers;
 492
 493                 for (i = 0; dhcp->timeservers && dhcp->timeservers[i]; i++) {
 494                         __connman_service_timeserver_append(service,
 495                                                         dhcp->timeservers[i]);
 496                 }
 497         } else {
 498                 g_strfreev(timeservers);
 499         }
 500
 501         if (g_strcmp0(pac, dhcp->pac) != 0) {
 502                 g_free(dhcp->pac);
 503                 dhcp->pac = pac;
 504
 505                 __connman_ipconfig_set_proxy_autoconfig(dhcp->ipconfig,
 506                                                                 dhcp->pac);
 507         }
 508
 509         if (connman_setting_get_bool("Enable6to4"))
 510                 __connman_6to4_probe(service);
 511
 512         return true;
 513 }
 514
 515 static void lease_available_cb(GDHCPClient *dhcp_client, gpointer user_data)
 516 {
 517         struct connman_dhcp *dhcp = user_data;
 518         GList *option = NULL;
 519         enum connman_ipconfig_method old_method;
 520         char *address, *netmask = NULL, *gateway = NULL;
 521         const char *c_address, *c_gateway;
 522         unsigned char prefixlen, c_prefixlen;
 523         bool ip_change = false;
 524
 525         DBG("Lease available");
 526
 527         if (dhcp->ipv4ll_client) {
 528                 ipv4ll_stop_client(dhcp);
 529                 dhcp_invalidate(dhcp, false);
 530         }
 531
 532         c_address = __connman_ipconfig_get_local(dhcp->ipconfig);
 533         c_gateway = __connman_ipconfig_get_gateway(dhcp->ipconfig);
 534         c_prefixlen = __connman_ipconfig_get_prefixlen(dhcp->ipconfig);
 535
 536         address = g_dhcp_client_get_address(dhcp_client);
 537
 538         __connman_ipconfig_set_dhcp_address(dhcp->ipconfig, address);
 539         DBG("last address %s", address);
 540
 541 #if defined TIZEN_EXT
 542         int dhcp_lease_duration = g_dhcp_client_get_dhcp_lease_duration(dhcp_client);
 543 #endif
 544
 545         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_SUBNET);
 546         if (option)
 547                 netmask = g_strdup(option->data);
 548
 549         option = g_dhcp_client_get_option(dhcp_client, G_DHCP_ROUTER);
 550         if (option)
 551                 gateway = g_strdup(option->data);
 552
 553         prefixlen = connman_ipaddress_calc_netmask_len(netmask);
 554         if (prefixlen == 255)
 555                 connman_warn("netmask: %s is invalid", netmask);
 556
 557         DBG("c_address %s", c_address);
 558
 559         old_method = __connman_ipconfig_get_method(dhcp->ipconfig);
 560
 561         if (g_strcmp0(address, c_address)) {
 562                 ip_change = true;
 563                 if (c_address) {
 564                         if (old_method == CONNMAN_IPCONFIG_METHOD_AUTO ||
 565                             old_method == CONNMAN_IPCONFIG_METHOD_DHCP) {
 566                                 c_gateway = NULL;
 567                                 c_prefixlen = 0;
 568                         }
 569
 570                         /* Remove old ip address */
 571                         __connman_ipconfig_address_remove(dhcp->ipconfig);
 572                 }
 573         }
 574         if (g_strcmp0(gateway, c_gateway)) {
 575                 ip_change = true;
 576                 if (c_gateway) {
 577                         /* Remove gateway ip address */
 578                         __connman_ipconfig_gateway_remove(dhcp->ipconfig);
 579                 }
 580         } else if (prefixlen != c_prefixlen)
 581                 ip_change = true;
 582
 583         __connman_ipconfig_set_method(dhcp->ipconfig,
 584                                                 CONNMAN_IPCONFIG_METHOD_DHCP);
 585
 586 #if defined TIZEN_EXT
 587         __connman_ipconfig_set_dhcp_lease_duration(dhcp->ipconfig, dhcp_lease_duration);
 588         __connman_network_notify_dhcp_changed(DHCP_SUCCESS,
 589                                 g_dhcp_client_get_interface(dhcp_client));
 590 #endif
 591
 592         /*
 593          * Notify IPv4.Configuration's method moved back to DHCP.
 594          *
 595          * This is the case ConnMan initially set an address by using
 596          * IPv4LL because DHCP failed but now we got an address from DHCP.
 597          */
 598         if (old_method == CONNMAN_IPCONFIG_METHOD_AUTO) {
 599                 struct connman_service *service =
 600                         connman_service_lookup_from_network(dhcp->network);
 601
 602                 if (service)
 603                         __connman_service_notify_ipv4_configuration(service);
 604         }
 605
 606 #if defined TIZEN_EXT
 607         if (connman_network_get_bool(dhcp->network, "WiFi.RoamingDHCP")) {
 608
 609                 if (ip_change)
 610                         connman_service_notify_reconnection_roaming(
 611                                 connman_service_lookup_from_network(dhcp->network));
 612
 613                 connman_network_set_bool(dhcp->network, "WiFi.RoamingDHCP", false);
 614         }
 615 #endif
 616
 617         if (ip_change) {
 618                 __connman_ipconfig_set_local(dhcp->ipconfig, address);
 619                 __connman_ipconfig_set_prefixlen(dhcp->ipconfig, prefixlen);
 620                 __connman_ipconfig_set_gateway(dhcp->ipconfig, gateway);
 621         }
 622
 623         if (!apply_lease_available_on_network(dhcp_client, dhcp))
 624                 goto done;
 625
 626         if (ip_change)
 627                 dhcp_valid(dhcp);
 628
 629 done:
 630         g_free(address);
 631         g_free(netmask);
 632         g_free(gateway);
 633 }
 634
 635 static void ipv4ll_available_cb(GDHCPClient *ipv4ll_client, gpointer user_data)
 636 {
 637         struct connman_dhcp *dhcp = user_data;
 638         enum connman_ipconfig_method old_method;
 639         char *address, *netmask;
 640         unsigned char prefixlen;
 641
 642         DBG("IPV4LL available");
 643
 644         address = g_dhcp_client_get_address(ipv4ll_client);
 645         netmask = g_dhcp_client_get_netmask(ipv4ll_client);
 646
 647         prefixlen = connman_ipaddress_calc_netmask_len(netmask);
 648
 649         old_method = __connman_ipconfig_get_method(dhcp->ipconfig);
 650         __connman_ipconfig_set_method(dhcp->ipconfig,
 651                                                 CONNMAN_IPCONFIG_METHOD_AUTO);
 652
 653         /*
 654          * Notify IPv4.Configuration's method is AUTO now.
 655          *
 656          * This is the case DHCP failed thus ConnMan used IPv4LL to get an
 657          * address. Set IPv4.Configuration method to AUTO allows user to
 658          * ask for a DHCP address by setting the method again to DHCP.
 659          */
 660         if (old_method == CONNMAN_IPCONFIG_METHOD_DHCP) {
 661                 struct connman_service *service =
 662                         connman_service_lookup_from_network(dhcp->network);
 663
 664                 if (service)
 665                         __connman_service_notify_ipv4_configuration(service);
 666         }
 667
 668         __connman_ipconfig_set_local(dhcp->ipconfig, address);
 669         __connman_ipconfig_set_prefixlen(dhcp->ipconfig, prefixlen);
 670         __connman_ipconfig_set_gateway(dhcp->ipconfig, NULL);
 671
 672         dhcp_valid(dhcp);
 673
 674         g_free(address);
 675         g_free(netmask);
 676
 677 #if defined TIZEN_EXT
 678         __connman_network_notify_dhcp_changed(DHCP_FAIL,
 679                         g_dhcp_client_get_interface(ipv4ll_client));
 680 #endif
 681 }
 682
 683 static int dhcp_initialize(struct connman_dhcp *dhcp)
 684 {
 685         GDHCPClient *dhcp_client;
 686         GDHCPClientError error;
 687         int index;
 688         const char *vendor_class_id;
 689
 690         DBG("dhcp %p", dhcp);
 691
 692         index = __connman_ipconfig_get_index(dhcp->ipconfig);
 693
 694         dhcp_client = g_dhcp_client_new(G_DHCP_IPV4, index, &error);
 695         if (error != G_DHCP_CLIENT_ERROR_NONE)
 696 #if defined TIZEN_EXT
 697         {
 698                 DBG("failed g_dhcp_client_new(%d), index(%d)", error, index);
 699 #endif
 700                 return -EINVAL;
 701 #if defined TIZEN_EXT
 702         }
 703 #endif
 704
 705 #if !defined TIZEN_EXT
 706         if (getenv("CONNMAN_DHCP_DEBUG")) {
 707 #endif
 708                 dhcp->dhcp_debug_prefix = g_strdup_printf("DHCP index %d",
 709                                                         index);
 710                 g_dhcp_client_set_debug(dhcp_client, dhcp_debug,
 711                                         dhcp->dhcp_debug_prefix);
 712 #if !defined TIZEN_EXT
 713         }
 714 #endif
 715
 716         g_dhcp_client_set_id(dhcp_client);
 717
 718         if (dhcp->network) {
 719                 struct connman_service *service;
 720                 const char *hostname;
 721
 722                 service = connman_service_lookup_from_network(dhcp->network);
 723
 724                 hostname = __connman_service_get_hostname(service);
 725                 if (!hostname)
 726                         hostname = connman_utsname_get_hostname();
 727
 728                 if (hostname)
 729                         g_dhcp_client_set_send(dhcp_client,
 730                                                 G_DHCP_HOST_NAME, hostname);
 731
 732                 g_dhcp_client_set_request(dhcp_client, G_DHCP_HOST_NAME);
 733                 g_dhcp_client_set_request(dhcp_client, G_DHCP_DNS_SERVER);
 734                 g_dhcp_client_set_request(dhcp_client, G_DHCP_DOMAIN_NAME);
 735                 g_dhcp_client_set_request(dhcp_client, G_DHCP_NTP_SERVER);
 736 #if defined TIZEN_EXT
 737                 g_dhcp_client_set_request(dhcp_client, G_DHCP_VENDOR_SPECIFIC_IE);
 738 #endif
 739                 g_dhcp_client_set_request(dhcp_client, 252);
 740                 g_dhcp_client_set_request(dhcp_client, G_DHCP_MTU);
 741         }
 742
 743         g_dhcp_client_set_request(dhcp_client, G_DHCP_ROUTER);
 744         g_dhcp_client_set_request(dhcp_client, G_DHCP_SUBNET);
 745
 746         vendor_class_id = connman_setting_get_string("VendorClassID");
 747         if (vendor_class_id)
 748                 g_dhcp_client_set_send(dhcp_client, G_DHCP_VENDOR_CLASS_ID,
 749                                         vendor_class_id);
 750
 751         g_dhcp_client_register_event(dhcp_client,
 752                         G_DHCP_CLIENT_EVENT_LEASE_AVAILABLE,
 753                                                 lease_available_cb, dhcp);
 754
 755         g_dhcp_client_register_event(dhcp_client,
 756                         G_DHCP_CLIENT_EVENT_LEASE_LOST, lease_lost_cb, dhcp);
 757
 758         g_dhcp_client_register_event(dhcp_client,
 759                         G_DHCP_CLIENT_EVENT_NO_LEASE, no_lease_cb, dhcp);
 760
 761         dhcp->dhcp_client = dhcp_client;
 762
 763         return 0;
 764 }
 765
 766 static int dhcp_release(struct connman_dhcp *dhcp)
 767 {
 768         DBG("dhcp %p", dhcp);
 769
 770         if (dhcp->timeout > 0) {
 771                 g_source_remove(dhcp->timeout);
 772                 dhcp->timeout = 0;
 773         }
 774
 775         if (dhcp->dhcp_client) {
 776                 g_dhcp_client_stop(dhcp->dhcp_client);
 777                 g_dhcp_client_unref(dhcp->dhcp_client);
 778         }
 779
 780         dhcp->dhcp_client = NULL;
 781
 782         g_free(dhcp->dhcp_debug_prefix);
 783         dhcp->dhcp_debug_prefix = NULL;
 784
 785         ipv4ll_stop_client(dhcp);
 786
 787         return 0;
 788 }
 789
 790 char *__connman_dhcp_get_server_address(struct connman_ipconfig *ipconfig)
 791 {
 792         struct connman_dhcp *dhcp;
 793
 794         dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
 795         if (!dhcp)
 796                 return NULL;
 797
 798         return g_dhcp_client_get_server_address(dhcp->dhcp_client);
 799 }
 800
 801 #if defined TIZEN_EXT_WIFI_MESH
 802 int __connman_mesh_dhcp_start(struct connman_ipconfig *ipconfig,
 803                         dhcp_cb callback, gpointer user_data)
 804 {
 805         struct connman_dhcp *dhcp;
 806         int err;
 807
 808         DBG("");
 809
 810         dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
 811         if (!dhcp) {
 812
 813                 dhcp = g_try_new0(struct connman_dhcp, 1);
 814                 if (!dhcp)
 815                         return -ENOMEM;
 816
 817                 dhcp->ipconfig = ipconfig;
 818                 __connman_ipconfig_ref(ipconfig);
 819
 820                 err = dhcp_initialize(dhcp);
 821
 822                 if (err < 0) {
 823                         g_free(dhcp);
 824                         return err;
 825                 }
 826
 827                 g_hash_table_insert(ipconfig_table, ipconfig, dhcp);
 828         }
 829
 830         dhcp->callback = callback;
 831         dhcp->user_data = user_data;
 832         return g_dhcp_client_start(dhcp->dhcp_client, NULL);
 833 }
 834 #endif
 835
 836 int __connman_dhcp_start(struct connman_ipconfig *ipconfig,
 837                         struct connman_network *network, dhcp_cb callback,
 838                         gpointer user_data)
 839 {
 840 #if !defined TIZEN_EXT
 841         const char *last_addr = NULL;
 842 #endif
 843         struct connman_dhcp *dhcp;
 844         int err;
 845
 846         DBG("");
 847
 848         if (network) {
 849                 struct connman_service *service;
 850
 851                 service = connman_service_lookup_from_network(network);
 852                 if (!service)
 853                         return -EINVAL;
 854         }
 855
 856 #if !defined TIZEN_EXT
 857         last_addr = __connman_ipconfig_get_dhcp_address(ipconfig);
 858 #endif
 859
 860         dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
 861         if (!dhcp) {
 862
 863                 dhcp = g_try_new0(struct connman_dhcp, 1);
 864                 if (!dhcp)
 865                         return -ENOMEM;
 866
 867                 dhcp->ipconfig = ipconfig;
 868                 __connman_ipconfig_ref(ipconfig);
 869
 870                 if (network) {
 871                         dhcp->network = network;
 872                         connman_network_ref(network);
 873                 }
 874
 875                 err = dhcp_initialize(dhcp);
 876
 877                 if (err < 0) {
 878                         if (network)
 879                                 connman_network_unref(network);
 880                         g_free(dhcp);
 881                         return err;
 882                 }
 883
 884                 g_hash_table_insert(ipconfig_table, ipconfig, dhcp);
 885         }
 886
 887         dhcp->callback = callback;
 888         dhcp->user_data = user_data;
 889
 890 #if defined TIZEN_EXT
 891         __connman_network_notify_dhcp_changed(DHCP_STARTED,
 892                         g_dhcp_client_get_interface(dhcp->dhcp_client));
 893
 894         if (network && connman_network_get_bool(network, "WiFi.RoamingDHCP")) {
 895                 const char *last_addr = __connman_ipconfig_get_dhcp_address(ipconfig);
 896
 897                 DBG("Start DHCP with last address request");
 898                 return g_dhcp_client_start(dhcp->dhcp_client, last_addr);
 899         } else {
 900                 DBG("Start DHCP with DHCPDISCOVER request");
 901                 return g_dhcp_client_start(dhcp->dhcp_client, NULL);
 902         }
 903 #else
 904         return g_dhcp_client_start(dhcp->dhcp_client, last_addr);
 905 #endif
 906 }
 907
 908 void __connman_dhcp_stop(struct connman_ipconfig *ipconfig)
 909 {
 910         struct connman_dhcp *dhcp;
 911
 912         DBG("ipconfig_table %p ipconfig %p", ipconfig_table, ipconfig);
 913
 914         if (!ipconfig_table)
 915                 return;
 916
 917         dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
 918         if (dhcp) {
 919                 g_hash_table_remove(ipconfig_table, ipconfig);
 920                 __connman_ipconfig_unref(ipconfig);
 921                 if (dhcp->network)
 922                         connman_network_unref(dhcp->network);
 923                 dhcp_release(dhcp);
 924                 dhcp_invalidate(dhcp, false);
 925                 dhcp_free(dhcp);
 926         }
 927 }
 928
 929 void __connman_dhcp_decline(struct connman_ipconfig *ipconfig)
 930 {
 931         struct connman_dhcp *dhcp;
 932         const char *address;
 933         struct in_addr addr;
 934
 935         DBG("ipconfig_table %p ipconfig %p", ipconfig_table, ipconfig);
 936
 937         if (!ipconfig_table)
 938                 return;
 939
 940         dhcp = g_hash_table_lookup(ipconfig_table, ipconfig);
 941         if (dhcp) {
 942                 address = __connman_ipconfig_get_local(ipconfig);
 943                 if (!address)
 944                         return;
 945
 946                 if (inet_pton(AF_INET, address, &addr) != 1)
 947                         connman_error("Could not convert address %s", address);
 948
 949                 g_dhcp_client_decline(dhcp->dhcp_client, htonl(addr.s_addr));
 950         }
 951 }
 952
 953 int __connman_dhcp_init(void)
 954 {
 955         DBG("");
 956
 957         ipconfig_table = g_hash_table_new_full(g_direct_hash, g_direct_equal,
 958                                                                 NULL, NULL);
 959
 960         return 0;
 961 }
 962
 963 void __connman_dhcp_cleanup(void)
 964 {
 965         DBG("");
 966
 967         g_hash_table_destroy(ipconfig_table);
 968         ipconfig_table = NULL;
 969 }