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

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2009  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 #include <unistd.h>
  28 #include <string.h>
  29 #include <sys/ioctl.h>
  30 #include <arpa/inet.h>
  31 #include <net/if.h>
  32 #include <net/route.h>
  33
  34 #include <gdbus.h>
  35
  36 #include "connman.h"
  37
  38 struct gateway_data {
  39         int index;
  40         char *gateway;
  41 };
  42
  43 static GSList *gateway_list = NULL;
  44
  45 static struct gateway_data *find_gateway(int index, const char *gateway)
  46 {
  47         GSList *list;
  48
  49         if (gateway == NULL)
  50                 return NULL;
  51
  52         for (list = gateway_list; list; list = list->next) {
  53                 struct gateway_data *data = list->data;
  54
  55                 if (data->gateway == NULL)
  56                         continue;
  57
  58                 if (data->index == index &&
  59                                 g_str_equal(data->gateway, gateway) == TRUE)
  60                         return data;
  61         }
  62
  63         return NULL;
  64 }
  65
  66 static int set_route(struct connman_element *element, const char *gateway)
  67 {
  68         struct ifreq ifr;
  69         struct rtentry rt;
  70         struct sockaddr_in *addr;
  71         int sk, err;
  72
  73         DBG("element %p", element);
  74
  75         sk = socket(PF_INET, SOCK_DGRAM, 0);
  76         if (sk < 0)
  77                 return -1;
  78
  79         memset(&ifr, 0, sizeof(ifr));
  80         ifr.ifr_ifindex = element->index;
  81
  82         if (ioctl(sk, SIOCGIFNAME, &ifr) < 0) {
  83                 close(sk);
  84                 return -1;
  85         }
  86
  87         DBG("ifname %s", ifr.ifr_name);
  88
  89         memset(&rt, 0, sizeof(rt));
  90         rt.rt_flags = RTF_UP | RTF_GATEWAY;
  91
  92         addr = (struct sockaddr_in *) &rt.rt_dst;
  93         addr->sin_family = AF_INET;
  94         addr->sin_addr.s_addr = INADDR_ANY;
  95
  96         addr = (struct sockaddr_in *) &rt.rt_gateway;
  97         addr->sin_family = AF_INET;
  98         addr->sin_addr.s_addr = inet_addr(gateway);
  99
 100         addr = (struct sockaddr_in *) &rt.rt_genmask;
 101         addr->sin_family = AF_INET;
 102         addr->sin_addr.s_addr = INADDR_ANY;
 103
 104         err = ioctl(sk, SIOCADDRT, &rt);
 105         if (err < 0)
 106                 DBG("default route setting failed (%s)", strerror(errno));
 107
 108         close(sk);
 109
 110         return err;
 111 }
 112
 113 static int del_route(struct connman_element *element, const char *gateway)
 114 {
 115         struct ifreq ifr;
 116         struct rtentry rt;
 117         struct sockaddr_in *addr;
 118         int sk, err;
 119
 120         DBG("element %p", element);
 121
 122         sk = socket(PF_INET, SOCK_DGRAM, 0);
 123         if (sk < 0)
 124                 return -1;
 125
 126         memset(&ifr, 0, sizeof(ifr));
 127         ifr.ifr_ifindex = element->index;
 128
 129         if (ioctl(sk, SIOCGIFNAME, &ifr) < 0) {
 130                 close(sk);
 131                 return -1;
 132         }
 133
 134         DBG("ifname %s", ifr.ifr_name);
 135
 136         memset(&rt, 0, sizeof(rt));
 137         rt.rt_flags = RTF_UP | RTF_GATEWAY;
 138
 139         addr = (struct sockaddr_in *) &rt.rt_dst;
 140         addr->sin_family = AF_INET;
 141         addr->sin_addr.s_addr = INADDR_ANY;
 142
 143         addr = (struct sockaddr_in *) &rt.rt_gateway;
 144         addr->sin_family = AF_INET;
 145         addr->sin_addr.s_addr = inet_addr(gateway);
 146
 147         addr = (struct sockaddr_in *) &rt.rt_genmask;
 148         addr->sin_family = AF_INET;
 149         addr->sin_addr.s_addr = INADDR_ANY;
 150
 151         err = ioctl(sk, SIOCDELRT, &rt);
 152         if (err < 0)
 153                 DBG("default route removal failed (%s)", strerror(errno));
 154
 155         close(sk);
 156
 157         return err;
 158 }
 159
 160 static DBusConnection *connection;
 161
 162 static void emit_default_signal(struct connman_element *element)
 163 {
 164         DBusMessage *signal;
 165         DBusMessageIter entry, value;
 166         const char *key = "Default";
 167
 168         signal = dbus_message_new_signal(element->path,
 169                         CONNMAN_CONNECTION_INTERFACE, "PropertyChanged");
 170         if (signal == NULL)
 171                 return;
 172
 173         dbus_message_iter_init_append(signal, &entry);
 174
 175         dbus_message_iter_append_basic(&entry, DBUS_TYPE_STRING, &key);
 176
 177         dbus_message_iter_open_container(&entry, DBUS_TYPE_VARIANT,
 178                                         DBUS_TYPE_BOOLEAN_AS_STRING, &value);
 179         dbus_message_iter_append_basic(&value, DBUS_TYPE_BOOLEAN,
 180                                                         &element->enabled);
 181         dbus_message_iter_close_container(&entry, &value);
 182
 183         g_dbus_send_message(connection, signal);
 184 }
 185
 186 static void set_default(struct connman_element *element, gpointer user_data)
 187 {
 188         struct gateway_data *data = user_data;
 189
 190         DBG("element %p name %s", element, element->name);
 191
 192         if (element->index != data->index)
 193                 return;
 194
 195         if (element->enabled == TRUE)
 196                 return;
 197
 198         connman_element_set_enabled(element, TRUE);
 199         emit_default_signal(element);
 200 }
 201
 202 static void del_default(struct connman_element *element, gpointer user_data)
 203 {
 204         struct gateway_data *data = user_data;
 205
 206         DBG("element %p name %s", element, element->name);
 207
 208         if (element->index != data->index)
 209                 return;
 210
 211         if (element->enabled == FALSE)
 212                 return;
 213
 214         connman_element_set_enabled(element, FALSE);
 215         emit_default_signal(element);
 216 }
 217
 218 static void new_default(struct connman_element *element, gpointer user_data)
 219 {
 220         const char *gateway;
 221
 222         DBG("element %p name %s", element, element->name);
 223
 224         if (g_slist_length(gateway_list) > 0)
 225                 return;
 226
 227         connman_element_get_value(element,
 228                                 CONNMAN_PROPERTY_ID_IPV4_GATEWAY, &gateway);
 229
 230         DBG("gateway %s", gateway);
 231
 232         if (gateway == NULL)
 233                 return;
 234
 235         set_route(element, gateway);
 236
 237         connman_element_set_enabled(element, TRUE);
 238         emit_default_signal(element);
 239 }
 240
 241 static void connection_newgateway(int index, const char *gateway)
 242 {
 243         struct gateway_data *data;
 244
 245         DBG("index %d gateway %s", index, gateway);
 246
 247         data = find_gateway(index, gateway);
 248         if (data != NULL)
 249                 return;
 250
 251         data = g_try_new0(struct gateway_data, 1);
 252         if (data == NULL)
 253                 return;
 254
 255         data->index = index;
 256         data->gateway = g_strdup(gateway);
 257
 258         gateway_list = g_slist_append(gateway_list, data);
 259
 260         __connman_element_foreach(NULL, CONNMAN_ELEMENT_TYPE_CONNECTION,
 261                                                         set_default, data);
 262 }
 263
 264 static void connection_delgateway(int index, const char *gateway)
 265 {
 266         struct gateway_data *data;
 267
 268         DBG("index %d gateway %s", index, gateway);
 269
 270         data = find_gateway(index, gateway);
 271         if (data == NULL)
 272                 return;
 273
 274         gateway_list = g_slist_remove(gateway_list, data);
 275
 276         __connman_element_foreach(NULL, CONNMAN_ELEMENT_TYPE_CONNECTION,
 277                                                         del_default, data);
 278
 279         g_free(data->gateway);
 280         g_free(data);
 281
 282         if (g_slist_length(gateway_list) > 0)
 283                 return;
 284
 285         DBG("selecting new default gateway");
 286
 287         __connman_element_foreach(NULL, CONNMAN_ELEMENT_TYPE_CONNECTION,
 288                                                         new_default, NULL);
 289 }
 290
 291 static struct connman_rtnl connection_rtnl = {
 292         .name           = "connection",
 293         .newgateway     = connection_newgateway,
 294         .delgateway     = connection_delgateway,
 295 };
 296
 297 static DBusMessage *get_properties(DBusConnection *conn,
 298                                         DBusMessage *msg, void *data)
 299 {
 300         struct connman_element *element = data;
 301         DBusMessage *reply;
 302         DBusMessageIter array, dict;
 303         connman_uint8_t strength = 0;
 304         const char *device, *network;
 305         const char *type = NULL;
 306
 307         DBG("conn %p", conn);
 308
 309         if (__connman_security_check_privilege(msg,
 310                                         CONNMAN_SECURITY_PRIVILEGE_PUBLIC) < 0)
 311                 return __connman_error_permission_denied(msg);
 312
 313         reply = dbus_message_new_method_return(msg);
 314         if (reply == NULL)
 315                 return NULL;
 316
 317         dbus_message_iter_init_append(reply, &array);
 318
 319         dbus_message_iter_open_container(&array, DBUS_TYPE_ARRAY,
 320                         DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING
 321                         DBUS_TYPE_STRING_AS_STRING DBUS_TYPE_VARIANT_AS_STRING
 322                         DBUS_DICT_ENTRY_END_CHAR_AS_STRING, &dict);
 323
 324         connman_element_get_static_property(element, "Type", &type);
 325
 326         if (type != NULL)
 327                 connman_dbus_dict_append_variant(&dict, "Type",
 328                                                 DBUS_TYPE_STRING, &type);
 329
 330         connman_element_get_static_property(element, "Strength", &strength);
 331         if (strength > 0)
 332                 connman_dbus_dict_append_variant(&dict, "Strength",
 333                                                 DBUS_TYPE_BYTE, &strength);
 334
 335         if (element->devname != NULL)
 336                 connman_dbus_dict_append_variant(&dict, "Interface",
 337                                         DBUS_TYPE_STRING, &element->devname);
 338
 339         connman_dbus_dict_append_variant(&dict, "Default",
 340                                         DBUS_TYPE_BOOLEAN, &element->enabled);
 341
 342         device = __connman_element_get_device(element);
 343         if (device != NULL)
 344                 connman_dbus_dict_append_variant(&dict, "Device",
 345                                         DBUS_TYPE_OBJECT_PATH, &device);
 346
 347         network = __connman_element_get_network(element);
 348         if (network != NULL)
 349                 connman_dbus_dict_append_variant(&dict, "Network",
 350                                         DBUS_TYPE_OBJECT_PATH, &network);
 351
 352         __connman_element_append_ipv4(element, &dict);
 353
 354         dbus_message_iter_close_container(&array, &dict);
 355
 356         return reply;
 357 }
 358
 359 static DBusMessage *set_property(DBusConnection *conn,
 360                                         DBusMessage *msg, void *data)
 361 {
 362         DBusMessageIter iter, value;
 363         const char *name;
 364         int type;
 365
 366         DBG("conn %p", conn);
 367
 368         if (dbus_message_iter_init(msg, &iter) == FALSE)
 369                 return __connman_error_invalid_arguments(msg);
 370
 371         dbus_message_iter_get_basic(&iter, &name);
 372         dbus_message_iter_next(&iter);
 373         dbus_message_iter_recurse(&iter, &value);
 374
 375         if (__connman_security_check_privilege(msg,
 376                                         CONNMAN_SECURITY_PRIVILEGE_MODIFY) < 0)
 377                 return __connman_error_permission_denied(msg);
 378
 379         type = dbus_message_iter_get_arg_type(&value);
 380
 381         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
 382 }
 383
 384 static GDBusMethodTable connection_methods[] = {
 385         { "GetProperties", "",   "a{sv}", get_properties },
 386         { "SetProperty",   "sv", "",      set_property   },
 387         { },
 388 };
 389
 390 static GDBusSignalTable connection_signals[] = {
 391         { "PropertyChanged", "sv" },
 392         { },
 393 };
 394
 395 static void append_connections(DBusMessageIter *entry)
 396 {
 397         DBusMessageIter value, iter;
 398         const char *key = "Connections";
 399
 400         dbus_message_iter_append_basic(entry, DBUS_TYPE_STRING, &key);
 401
 402         dbus_message_iter_open_container(entry, DBUS_TYPE_VARIANT,
 403                 DBUS_TYPE_ARRAY_AS_STRING DBUS_TYPE_OBJECT_PATH_AS_STRING,
 404                                                                 &value);
 405
 406         dbus_message_iter_open_container(&value, DBUS_TYPE_ARRAY,
 407                                 DBUS_TYPE_OBJECT_PATH_AS_STRING, &iter);
 408         __connman_element_list(NULL, CONNMAN_ELEMENT_TYPE_CONNECTION, &iter);
 409         dbus_message_iter_close_container(&value, &iter);
 410
 411         dbus_message_iter_close_container(entry, &value);
 412 }
 413
 414 static void emit_connections_signal(void)
 415 {
 416         DBusMessage *signal;
 417         DBusMessageIter entry;
 418
 419         signal = dbus_message_new_signal(CONNMAN_MANAGER_PATH,
 420                                 CONNMAN_MANAGER_INTERFACE, "PropertyChanged");
 421         if (signal == NULL)
 422                 return;
 423
 424         dbus_message_iter_init_append(signal, &entry);
 425
 426         append_connections(&entry);
 427
 428         g_dbus_send_message(connection, signal);
 429 }
 430
 431 static int register_interface(struct connman_element *element)
 432 {
 433         DBG("element %p name %s", element, element->name);
 434
 435         if (g_dbus_register_interface(connection, element->path,
 436                                         CONNMAN_CONNECTION_INTERFACE,
 437                                         connection_methods, connection_signals,
 438                                         NULL, element, NULL) == FALSE) {
 439                 connman_error("Failed to register %s connection", element->path);
 440                 return -EIO;
 441         }
 442
 443         emit_connections_signal();
 444
 445         return 0;
 446 }
 447
 448 static void unregister_interface(struct connman_element *element)
 449 {
 450         DBG("element %p name %s", element, element->name);
 451
 452         emit_connections_signal();
 453
 454         g_dbus_unregister_interface(connection, element->path,
 455                                                 CONNMAN_CONNECTION_INTERFACE);
 456 }
 457
 458 static int connection_probe(struct connman_element *element)
 459 {
 460         const char *gateway = NULL;
 461
 462         DBG("element %p name %s", element, element->name);
 463
 464         if (element->parent == NULL)
 465                 return -ENODEV;
 466
 467         if (element->parent->type != CONNMAN_ELEMENT_TYPE_IPV4)
 468                 return -ENODEV;
 469
 470         connman_element_get_value(element,
 471                                 CONNMAN_PROPERTY_ID_IPV4_GATEWAY, &gateway);
 472
 473         DBG("gateway %s", gateway);
 474
 475         if (register_interface(element) < 0)
 476                 return -ENODEV;
 477
 478         if (gateway == NULL)
 479                 return 0;
 480
 481         if (find_gateway(element->index, gateway) != NULL) {
 482                 DBG("previous gateway still present");
 483                 goto done;
 484         }
 485
 486         if (g_slist_length(gateway_list) > 0) {
 487                 DBG("default gateway already present");
 488                 return 0;
 489         }
 490
 491         set_route(element, gateway);
 492
 493 done:
 494         connman_element_set_enabled(element, TRUE);
 495         emit_default_signal(element);
 496
 497         return 0;
 498 }
 499
 500 static void connection_remove(struct connman_element *element)
 501 {
 502         const char *gateway = NULL;
 503
 504         DBG("element %p name %s", element, element->name);
 505
 506         unregister_interface(element);
 507
 508         connman_element_get_value(element,
 509                                 CONNMAN_PROPERTY_ID_IPV4_GATEWAY, &gateway);
 510
 511         DBG("gateway %s", gateway);
 512
 513         if (gateway == NULL)
 514                 return;
 515
 516         connman_element_set_enabled(element, FALSE);
 517         emit_default_signal(element);
 518
 519         del_route(element, gateway);
 520 }
 521
 522 static struct connman_driver connection_driver = {
 523         .name           = "connection",
 524         .type           = CONNMAN_ELEMENT_TYPE_CONNECTION,
 525         .priority       = CONNMAN_DRIVER_PRIORITY_LOW,
 526         .probe          = connection_probe,
 527         .remove         = connection_remove,
 528 };
 529
 530 int __connman_connection_init(void)
 531 {
 532         DBG("");
 533
 534         connection = connman_dbus_get_connection();
 535
 536         if (connman_rtnl_register(&connection_rtnl) < 0)
 537                 connman_error("Failed to setup RTNL gateway driver");
 538
 539         connman_rtnl_send_getroute();
 540
 541         return connman_driver_register(&connection_driver);
 542 }
 543
 544 void __connman_connection_cleanup(void)
 545 {
 546         GSList *list;
 547
 548         DBG("");
 549
 550         connman_driver_unregister(&connection_driver);
 551
 552         connman_rtnl_unregister(&connection_rtnl);
 553
 554         for (list = gateway_list; list; list = list->next) {
 555                 struct gateway_data *data = list->data;
 556
 557                 DBG("index %d gateway %s", data->index, data->gateway);
 558
 559                 g_free(data->gateway);
 560                 g_free(data);
 561                 list->data = NULL;
 562         }
 563
 564         g_slist_free(gateway_list);
 565         gateway_list = NULL;
 566
 567         dbus_connection_unref(connection);
 568 }