git.maemo.org Git - connman/blob - src/element.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2008  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
  26 #include <errno.h>
  27
  28 #include <glib.h>
  29 #include <gdbus.h>
  30
  31 #include "connman.h"
  32
  33 static DBusConnection *connection;
  34
  35 static GStaticMutex driver_mutex = G_STATIC_MUTEX_INIT;
  36 static GSList *driver_list = NULL;
  37 static GThreadPool *driver_thread;
  38
  39 static GStaticMutex element_mutex = G_STATIC_MUTEX_INIT;
  40 static GNode *element_root = NULL;
  41 static GThreadPool *element_thread;
  42
  43 static const char *type2string(enum connman_element_type type)
  44 {
  45         switch (type) {
  46         case CONNMAN_ELEMENT_TYPE_UNKNOWN:
  47                 return "unknown";
  48         case CONNMAN_ELEMENT_TYPE_ROOT:
  49                 return "root";
  50         case CONNMAN_ELEMENT_TYPE_DEVICE:
  51                 return "device";
  52         case CONNMAN_ELEMENT_TYPE_NETWORK:
  53                 return "network";
  54         case CONNMAN_ELEMENT_TYPE_IPV4:
  55                 return "ipv4";
  56         case CONNMAN_ELEMENT_TYPE_IPV6:
  57                 return "ipv6";
  58         case CONNMAN_ELEMENT_TYPE_DHCP:
  59                 return "dhcp";
  60         case CONNMAN_ELEMENT_TYPE_BOOTP:
  61                 return "bootp";
  62         case CONNMAN_ELEMENT_TYPE_ZEROCONF:
  63                 return "zeroconf";
  64         case CONNMAN_ELEMENT_TYPE_CONNECTION:
  65                 return "42";
  66         }
  67
  68         return NULL;
  69 }
  70
  71 static const char *subtype2string(enum connman_element_subtype type)
  72 {
  73         switch (type) {
  74         case CONNMAN_ELEMENT_SUBTYPE_UNKNOWN:
  75                 return "unknown";
  76         case CONNMAN_ELEMENT_SUBTYPE_ETHERNET:
  77                 return "ethernet";
  78         case CONNMAN_ELEMENT_SUBTYPE_WIFI:
  79                 return "wifi";
  80         case CONNMAN_ELEMENT_SUBTYPE_WIMAX:
  81                 return "wimax";
  82         case CONNMAN_ELEMENT_SUBTYPE_MODEM:
  83                 return "modem";
  84         case CONNMAN_ELEMENT_SUBTYPE_BLUETOOTH:
  85                 return "bluetooth";
  86         }
  87
  88         return NULL;
  89 }
  90
  91 static void append_entry(DBusMessageIter *dict,
  92                                 const char *key, int type, void *val)
  93 {
  94         DBusMessageIter entry, value;
  95         const char *signature;
  96
  97         dbus_message_iter_open_container(dict, DBUS_TYPE_DICT_ENTRY,
  98                                                                 NULL, &entry);
  99
 100         dbus_message_iter_append_basic(&entry, DBUS_TYPE_STRING, &key);
 101
 102         switch (type) {
 103         case DBUS_TYPE_STRING:
 104                 signature = DBUS_TYPE_STRING_AS_STRING;
 105                 break;
 106         case DBUS_TYPE_UINT16:
 107                 signature = DBUS_TYPE_UINT16_AS_STRING;
 108                 break;
 109         default:
 110                 signature = DBUS_TYPE_VARIANT_AS_STRING;
 111                 break;
 112         }
 113
 114         dbus_message_iter_open_container(&entry, DBUS_TYPE_VARIANT,
 115                                                         signature, &value);
 116         dbus_message_iter_append_basic(&value, type, val);
 117         dbus_message_iter_close_container(&entry, &value);
 118
 119         dbus_message_iter_close_container(dict, &entry);
 120 }
 121
 122 static DBusMessage *get_properties(DBusConnection *conn,
 123                                         DBusMessage *msg, void *data)
 124 {
 125         struct connman_element *element = data;
 126         DBusMessage *reply;
 127         DBusMessageIter array, dict;
 128         const char *str;
 129
 130         DBG("conn %p", conn);
 131
 132         reply = dbus_message_new_method_return(msg);
 133         if (reply == NULL)
 134                 return NULL;
 135
 136         dbus_message_iter_init_append(reply, &array);
 137
 138         dbus_message_iter_open_container(&array, DBUS_TYPE_ARRAY,
 139                         DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING
 140                         DBUS_TYPE_STRING_AS_STRING DBUS_TYPE_VARIANT_AS_STRING
 141                         DBUS_DICT_ENTRY_END_CHAR_AS_STRING, &dict);
 142
 143         str = type2string(element->type);
 144         if (str != NULL)
 145                 append_entry(&dict, "Type", DBUS_TYPE_STRING, &str);
 146
 147         str = subtype2string(element->subtype);
 148         if (str != NULL)
 149                 append_entry(&dict, "Subtype", DBUS_TYPE_STRING, &str);
 150
 151         if (element->info.driver != NULL)
 152                 append_entry(&dict, "Driver",
 153                                 DBUS_TYPE_STRING, &element->info.driver);
 154
 155         if (element->info.vendor != NULL)
 156                 append_entry(&dict, "Vendor",
 157                                 DBUS_TYPE_STRING, &element->info.vendor);
 158
 159         if (element->info.product != NULL)
 160                 append_entry(&dict, "Product",
 161                                 DBUS_TYPE_STRING, &element->info.product);
 162
 163         if (element->ipv4.address != NULL)
 164                 append_entry(&dict, "IPv4.Address",
 165                                 DBUS_TYPE_STRING, &element->ipv4.address);
 166
 167         if (element->ipv4.netmask != NULL)
 168                 append_entry(&dict, "IPv4.Netmask",
 169                                 DBUS_TYPE_STRING, &element->ipv4.netmask);
 170
 171         if (element->ipv4.gateway != NULL)
 172                 append_entry(&dict, "IPv4.Gateway",
 173                                 DBUS_TYPE_STRING, &element->ipv4.gateway);
 174
 175         dbus_message_iter_close_container(&array, &dict);
 176
 177         return reply;
 178 }
 179
 180 static GDBusMethodTable element_methods[] = {
 181         { "GetProperties", "", "a{sv}", get_properties },
 182         { },
 183 };
 184
 185 struct append_filter {
 186         enum connman_element_type type;
 187         DBusMessageIter *iter;
 188 };
 189
 190 static gboolean append_path(GNode *node, gpointer data)
 191 {
 192         struct connman_element *element = node->data;
 193         struct append_filter *filter = data;
 194
 195         DBG("element %p name %s", element, element->name);
 196
 197         if (element->type == CONNMAN_ELEMENT_TYPE_ROOT)
 198                 return FALSE;
 199
 200         if (filter->type != CONNMAN_ELEMENT_TYPE_UNKNOWN &&
 201                                         filter->type != element->type)
 202                 return FALSE;
 203
 204         dbus_message_iter_append_basic(filter->iter,
 205                                 DBUS_TYPE_OBJECT_PATH, &element->path);
 206
 207         return FALSE;
 208 }
 209
 210 void __connman_element_list(enum connman_element_type type,
 211                                                 DBusMessageIter *iter)
 212 {
 213         struct append_filter filter = { type, iter };
 214
 215         DBG("");
 216
 217         g_static_mutex_lock(&element_mutex);
 218         g_node_traverse(element_root, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
 219                                                         append_path, &filter);
 220         g_static_mutex_unlock(&element_mutex);
 221 }
 222
 223 static gint compare_priority(gconstpointer a, gconstpointer b)
 224 {
 225         const struct connman_driver *driver1 = a;
 226         const struct connman_driver *driver2 = b;
 227
 228         return driver2->priority - driver1->priority;
 229 }
 230
 231 int connman_driver_register(struct connman_driver *driver)
 232 {
 233         DBG("driver %p name %s", driver, driver->name);
 234
 235         if (driver->type == CONNMAN_ELEMENT_TYPE_ROOT)
 236                 return -1;
 237
 238         if (!driver->probe)
 239                 return -EINVAL;
 240
 241         g_static_mutex_lock(&driver_mutex);
 242         driver_list = g_slist_insert_sorted(driver_list, driver,
 243                                                         compare_priority);
 244         g_static_mutex_unlock(&driver_mutex);
 245
 246         g_thread_pool_push(driver_thread, driver, NULL);
 247
 248         return 0;
 249 }
 250
 251 static gboolean remove_driver(GNode *node, gpointer data)
 252 {
 253         struct connman_element *element = node->data;
 254         struct connman_driver *driver = data;
 255
 256         DBG("element %p name %s", element, element->name);
 257
 258         if (element->driver == driver) {
 259                 if (driver->remove)
 260                         driver->remove(element);
 261                 element->driver = NULL;
 262         }
 263
 264         return FALSE;
 265 }
 266
 267 void connman_driver_unregister(struct connman_driver *driver)
 268 {
 269         DBG("driver %p name %s", driver, driver->name);
 270
 271         g_static_mutex_lock(&element_mutex);
 272         g_node_traverse(element_root, G_POST_ORDER, G_TRAVERSE_ALL, -1,
 273                                                         remove_driver, driver);
 274         g_static_mutex_unlock(&element_mutex);
 275
 276         g_static_mutex_lock(&driver_mutex);
 277         driver_list = g_slist_remove(driver_list, driver);
 278         g_static_mutex_unlock(&driver_mutex);
 279 }
 280
 281 struct connman_element *connman_element_create(void)
 282 {
 283         struct connman_element *element;
 284
 285         element = g_new0(struct connman_element, 1);
 286
 287         DBG("element %p", element);
 288
 289         element->refcount = 1;
 290
 291         element->type    = CONNMAN_ELEMENT_TYPE_UNKNOWN;
 292         element->subtype = CONNMAN_ELEMENT_SUBTYPE_UNKNOWN;
 293         element->state   = CONNMAN_ELEMENT_STATE_CLOSED;
 294
 295         element->netdev.index = -1;
 296
 297         return element;
 298 }
 299
 300 struct connman_element *connman_element_ref(struct connman_element *element)
 301 {
 302         DBG("element %p name %s refcount %d", element, element->name,
 303                                 g_atomic_int_get(&element->refcount) + 1);
 304
 305         g_atomic_int_inc(&element->refcount);
 306
 307         return element;
 308 }
 309
 310 void connman_element_unref(struct connman_element *element)
 311 {
 312         DBG("element %p name %s refcount %d", element, element->name,
 313                                 g_atomic_int_get(&element->refcount) - 1);
 314
 315         if (g_atomic_int_dec_and_test(&element->refcount) == TRUE) {
 316                 g_free(element->ipv4.address);
 317                 g_free(element->ipv4.netmask);
 318                 g_free(element->ipv4.gateway);
 319                 g_free(element->ipv4.network);
 320                 g_free(element->ipv4.broadcast);
 321                 g_free(element->ipv4.nameserver);
 322                 g_free(element->netdev.name);
 323                 g_free(element->info.driver);
 324                 g_free(element->info.vendor);
 325                 g_free(element->info.product);
 326                 g_free(element->path);
 327                 g_free(element->name);
 328                 g_free(element);
 329         }
 330 }
 331
 332 int connman_element_register(struct connman_element *element,
 333                                         struct connman_element *parent)
 334 {
 335         GNode *node;
 336         const gchar *basepath;
 337
 338         DBG("element %p name %s parent %p", element, element->name, parent);
 339
 340         if (connman_element_ref(element) == NULL)
 341                 return -1;
 342
 343         g_static_mutex_lock(&element_mutex);
 344
 345         if (parent) {
 346                 node = g_node_find(element_root, G_PRE_ORDER,
 347                                                 G_TRAVERSE_ALL, parent);
 348                 basepath = parent->path;
 349
 350                 if (element->subtype == CONNMAN_ELEMENT_SUBTYPE_UNKNOWN)
 351                         element->subtype = parent->subtype;
 352         } else {
 353                 node = element_root;
 354                 basepath = "";
 355         }
 356
 357         if (element->name == NULL) {
 358                 switch (element->type) {
 359                 case CONNMAN_ELEMENT_TYPE_IPV4:
 360                         element->name = g_strdup("ipv4");
 361                         break;
 362                 case CONNMAN_ELEMENT_TYPE_IPV6:
 363                         element->name = g_strdup("ipv6");
 364                         break;
 365                 case CONNMAN_ELEMENT_TYPE_DHCP:
 366                         element->name = g_strdup("dhcp");
 367                         break;
 368                 case CONNMAN_ELEMENT_TYPE_BOOTP:
 369                         element->name = g_strdup("bootp");
 370                         break;
 371                 case CONNMAN_ELEMENT_TYPE_ZEROCONF:
 372                         element->name = g_strdup("zeroconf");
 373                         break;
 374                 default:
 375                         break;
 376                 }
 377         }
 378
 379         element->path = g_strdup_printf("%s/%s", basepath, element->name);
 380         element->parent = parent;
 381
 382         DBG("element %p path %s", element, element->path);
 383
 384         g_node_append_data(node, element);
 385
 386         g_static_mutex_unlock(&element_mutex);
 387
 388         g_dbus_register_interface(connection, element->path,
 389                                         CONNMAN_ELEMENT_INTERFACE,
 390                                         element_methods, NULL, NULL,
 391                                                         element, NULL);
 392
 393         g_dbus_emit_signal(connection, CONNMAN_MANAGER_PATH,
 394                                 CONNMAN_MANAGER_INTERFACE, "ElementAdded",
 395                                 DBUS_TYPE_OBJECT_PATH, &element->path,
 396                                                         DBUS_TYPE_INVALID);
 397
 398         if (element->type == CONNMAN_ELEMENT_TYPE_DEVICE)
 399                 g_dbus_emit_signal(connection, CONNMAN_MANAGER_PATH,
 400                                 CONNMAN_MANAGER_INTERFACE, "DeviceAdded",
 401                                 DBUS_TYPE_OBJECT_PATH, &element->path,
 402                                                         DBUS_TYPE_INVALID);
 403
 404         g_thread_pool_push(element_thread, element, NULL);
 405
 406         return 0;
 407 }
 408
 409 void connman_element_unregister(struct connman_element *element)
 410 {
 411         GNode *node;
 412
 413         DBG("element %p name %s", element, element->name);
 414
 415         if (element->type == CONNMAN_ELEMENT_TYPE_DEVICE)
 416                 g_dbus_emit_signal(connection, CONNMAN_MANAGER_PATH,
 417                                 CONNMAN_MANAGER_INTERFACE, "DeviceRemoved",
 418                                 DBUS_TYPE_OBJECT_PATH, &element->path,
 419                                                         DBUS_TYPE_INVALID);
 420
 421         g_dbus_emit_signal(connection, CONNMAN_MANAGER_PATH,
 422                                 CONNMAN_MANAGER_INTERFACE, "ElementRemoved",
 423                                 DBUS_TYPE_OBJECT_PATH, &element->path,
 424                                                         DBUS_TYPE_INVALID);
 425
 426         g_dbus_unregister_interface(connection, element->path,
 427                                                 CONNMAN_ELEMENT_INTERFACE);
 428
 429         g_static_mutex_lock(&element_mutex);
 430
 431         if (element->driver) {
 432                 if (element->driver->remove)
 433                         element->driver->remove(element);
 434                 element->driver = NULL;
 435         }
 436
 437         node = g_node_find(element_root, G_PRE_ORDER, G_TRAVERSE_ALL, element);
 438         if (node != NULL) {
 439                 g_node_unlink(node);
 440                 g_node_destroy(node);
 441         }
 442
 443         g_static_mutex_unlock(&element_mutex);
 444
 445         connman_element_unref(element);
 446 }
 447
 448 void connman_element_update(struct connman_element *element)
 449 {
 450         DBG("element %p name %s", element, element->name);
 451
 452         g_static_mutex_lock(&element_mutex);
 453
 454         if (element->driver && element->driver->update)
 455                 element->driver->update(element);
 456
 457         g_static_mutex_unlock(&element_mutex);
 458 }
 459
 460 static inline void set_driver(struct connman_element *element,
 461                                                 struct connman_driver *driver)
 462 {
 463         g_static_mutex_lock(&element_mutex);
 464         element->driver = driver;
 465         g_static_mutex_unlock(&element_mutex);
 466 }
 467
 468 static gboolean match_driver(struct connman_element *element,
 469                                         struct connman_driver *driver)
 470 {
 471         if (element->type != driver->type &&
 472                         driver->type != CONNMAN_ELEMENT_TYPE_UNKNOWN)
 473                 return FALSE;
 474
 475         if (element->subtype == driver->subtype ||
 476                         driver->subtype == CONNMAN_ELEMENT_SUBTYPE_UNKNOWN)
 477                 return TRUE;
 478
 479         return FALSE;
 480 }
 481
 482 static gboolean probe_driver(GNode *node, gpointer data)
 483 {
 484         struct connman_element *element = node->data;
 485         struct connman_driver *driver = data;
 486
 487         DBG("element %p name %s", element, element->name);
 488
 489         if (!element->driver && match_driver(element, driver) == TRUE) {
 490                 element->driver = driver;
 491
 492                 if (driver->probe(element) < 0)
 493                         element->driver = NULL;
 494         }
 495
 496         return FALSE;
 497 }
 498
 499 static void driver_probe(gpointer data, gpointer user_data)
 500 {
 501         struct connman_driver *driver = data;
 502
 503         DBG("driver %p name %s", driver, driver->name);
 504
 505         g_static_mutex_lock(&element_mutex);
 506         g_node_traverse(element_root, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
 507                                                         probe_driver, driver);
 508         g_static_mutex_unlock(&element_mutex);
 509 }
 510
 511 static void element_probe(gpointer data, gpointer user_data)
 512 {
 513         struct connman_element *element = data;
 514         GSList *list;
 515
 516         DBG("element %p name %s", element, element->name);
 517
 518         if (connman_element_ref(element) == NULL)
 519                 return;
 520
 521         g_static_mutex_lock(&driver_mutex);
 522
 523         for (list = driver_list; list; list = list->next) {
 524                 struct connman_driver *driver = list->data;
 525
 526                 DBG("driver %p name %s", driver, driver->name);
 527
 528                 set_driver(element, driver);
 529
 530                 if (match_driver(element, driver) == TRUE &&
 531                                                 driver->probe(element) == 0)
 532                         break;
 533
 534                 set_driver(element, NULL);
 535         }
 536
 537         g_static_mutex_unlock(&driver_mutex);
 538
 539         connman_element_unref(element);
 540 }
 541
 542 int __connman_element_init(DBusConnection *conn)
 543 {
 544         struct connman_element *element;
 545
 546         DBG("conn %p", conn);
 547
 548         connection = dbus_connection_ref(conn);
 549         if (connection == NULL)
 550                 return -EIO;
 551
 552         g_static_mutex_lock(&element_mutex);
 553
 554         element = connman_element_create();
 555
 556         element->name = g_strdup("root");
 557         element->path = g_strdup("/");
 558         element->type = CONNMAN_ELEMENT_TYPE_ROOT;
 559
 560         element_root = g_node_new(element);
 561
 562         g_static_mutex_unlock(&element_mutex);
 563
 564         element_thread = g_thread_pool_new(element_probe, NULL, 1, FALSE, NULL);
 565
 566         driver_thread = g_thread_pool_new(driver_probe, NULL, 1, FALSE, NULL);
 567
 568         return 0;
 569 }
 570
 571 static gboolean free_node(GNode *node, gpointer data)
 572 {
 573         struct connman_element *element = node->data;
 574
 575         DBG("element %p name %s", element, element->name);
 576
 577         g_dbus_unregister_interface(connection, element->path,
 578                                                 CONNMAN_ELEMENT_INTERFACE);
 579
 580         if (element->driver) {
 581                 if (element->driver->remove)
 582                         element->driver->remove(element);
 583                 element->driver = NULL;
 584         }
 585
 586         connman_element_unref(element);
 587
 588         node->data = NULL;
 589
 590         return FALSE;
 591 }
 592
 593 void __connman_element_cleanup(void)
 594 {
 595         DBG("");
 596
 597         g_thread_pool_free(driver_thread, TRUE, TRUE);
 598
 599         g_thread_pool_free(element_thread, TRUE, TRUE);
 600
 601         g_static_mutex_lock(&element_mutex);
 602
 603         g_node_traverse(element_root, G_POST_ORDER, G_TRAVERSE_ALL, -1,
 604                                                         free_node, NULL);
 605
 606         g_node_destroy(element_root);
 607         element_root = NULL;
 608
 609         g_static_mutex_unlock(&element_mutex);
 610
 611         dbus_connection_unref(connection);
 612 }