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 void remove_gateway(int index, const char *gateway)
  67 {
  68         struct gateway_data *data;
  69
  70         data = find_gateway(index, gateway);
  71         if (data == NULL)
  72                 return;
  73
  74         gateway_list = g_slist_remove(gateway_list, data);
  75 }
  76
  77 static int set_route(struct connman_element *element, const char *gateway)
  78 {
  79         struct ifreq ifr;
  80         struct rtentry rt;
  81         struct sockaddr_in *addr;
  82         int sk, err;
  83
  84         DBG("element %p", element);
  85
  86         sk = socket(PF_INET, SOCK_DGRAM, 0);
  87         if (sk < 0)
  88                 return -1;
  89
  90         memset(&ifr, 0, sizeof(ifr));
  91         ifr.ifr_ifindex = element->index;
  92
  93         if (ioctl(sk, SIOCGIFNAME, &ifr) < 0) {
  94                 close(sk);
  95                 return -1;
  96         }
  97
  98         DBG("ifname %s", ifr.ifr_name);
  99
 100         memset(&rt, 0, sizeof(rt));
 101         rt.rt_flags = RTF_UP | RTF_GATEWAY;
 102
 103         addr = (struct sockaddr_in *) &rt.rt_dst;
 104         addr->sin_family = AF_INET;
 105         addr->sin_addr.s_addr = INADDR_ANY;
 106
 107         addr = (struct sockaddr_in *) &rt.rt_gateway;
 108         addr->sin_family = AF_INET;
 109         addr->sin_addr.s_addr = inet_addr(gateway);
 110
 111         addr = (struct sockaddr_in *) &rt.rt_genmask;
 112         addr->sin_family = AF_INET;
 113         addr->sin_addr.s_addr = INADDR_ANY;
 114
 115         err = ioctl(sk, SIOCADDRT, &rt);
 116         if (err < 0)
 117                 DBG("default route setting failed (%s)", strerror(errno));
 118
 119         close(sk);
 120
 121         return err;
 122 }
 123
 124 static int del_route(struct connman_element *element, const char *gateway)
 125 {
 126         struct ifreq ifr;
 127         struct rtentry rt;
 128         struct sockaddr_in *addr;
 129         int sk, err;
 130
 131         DBG("element %p", element);
 132
 133         sk = socket(PF_INET, SOCK_DGRAM, 0);
 134         if (sk < 0)
 135                 return -1;
 136
 137         memset(&ifr, 0, sizeof(ifr));
 138         ifr.ifr_ifindex = element->index;
 139
 140         if (ioctl(sk, SIOCGIFNAME, &ifr) < 0) {
 141                 close(sk);
 142                 return -1;
 143         }
 144
 145         DBG("ifname %s", ifr.ifr_name);
 146
 147         memset(&rt, 0, sizeof(rt));
 148         rt.rt_flags = RTF_UP | RTF_GATEWAY;
 149
 150         addr = (struct sockaddr_in *) &rt.rt_dst;
 151         addr->sin_family = AF_INET;
 152         addr->sin_addr.s_addr = INADDR_ANY;
 153
 154         addr = (struct sockaddr_in *) &rt.rt_gateway;
 155         addr->sin_family = AF_INET;
 156         addr->sin_addr.s_addr = inet_addr(gateway);
 157
 158         addr = (struct sockaddr_in *) &rt.rt_genmask;
 159         addr->sin_family = AF_INET;
 160         addr->sin_addr.s_addr = INADDR_ANY;
 161
 162         err = ioctl(sk, SIOCDELRT, &rt);
 163         if (err < 0)
 164                 DBG("default route removal failed (%s)", strerror(errno));
 165
 166         close(sk);
 167
 168         return err;
 169 }
 170
 171 static DBusConnection *connection;
 172
 173 static void emit_default_signal(struct connman_element *element)
 174 {
 175         DBusMessage *signal;
 176         DBusMessageIter entry, value;
 177         const char *key = "Default";
 178
 179         signal = dbus_message_new_signal(element->path,
 180                         CONNMAN_CONNECTION_INTERFACE, "PropertyChanged");
 181         if (signal == NULL)
 182                 return;
 183
 184         dbus_message_iter_init_append(signal, &entry);
 185
 186         dbus_message_iter_append_basic(&entry, DBUS_TYPE_STRING, &key);
 187
 188         dbus_message_iter_open_container(&entry, DBUS_TYPE_VARIANT,
 189                                         DBUS_TYPE_BOOLEAN_AS_STRING, &value);
 190         dbus_message_iter_append_basic(&value, DBUS_TYPE_BOOLEAN,
 191                                                         &element->enabled);
 192         dbus_message_iter_close_container(&entry, &value);
 193
 194         g_dbus_send_message(connection, signal);
 195 }
 196
 197 static void set_default(struct connman_element *element, gpointer user_data)
 198 {
 199         struct gateway_data *data = user_data;
 200
 201         DBG("element %p name %s", element, element->name);
 202
 203         if (element->index != data->index)
 204                 return;
 205
 206         if (element->enabled == TRUE)
 207                 return;
 208
 209         connman_element_set_enabled(element, TRUE);
 210         emit_default_signal(element);
 211 }
 212
 213 static void del_default(struct connman_element *element, gpointer user_data)
 214 {
 215         struct gateway_data *data = user_data;
 216
 217         DBG("element %p name %s", element, element->name);
 218
 219         if (element->index != data->index)
 220                 return;
 221
 222         if (element->enabled == FALSE)
 223                 return;
 224
 225         connman_element_set_enabled(element, FALSE);
 226         emit_default_signal(element);
 227 }
 228
 229 static void new_default(struct connman_element *element, gpointer user_data)
 230 {
 231         const char *gateway;
 232
 233         DBG("element %p name %s", element, element->name);
 234
 235         if (g_slist_length(gateway_list) > 0)
 236                 return;
 237
 238         connman_element_get_value(element,
 239                                 CONNMAN_PROPERTY_ID_IPV4_GATEWAY, &gateway);
 240
 241         DBG("gateway %s", gateway);
 242
 243         if (gateway == NULL)
 244                 return;
 245
 246         set_route(element, gateway);
 247
 248         connman_element_set_enabled(element, TRUE);
 249         emit_default_signal(element);
 250 }
 251
 252 static void connection_newgateway(int index, const char *gateway)
 253 {
 254         struct gateway_data *data;
 255
 256         DBG("index %d gateway %s", index, gateway);
 257
 258         data = find_gateway(index, gateway);
 259         if (data != NULL)
 260                 return;
 261
 262         data = g_try_new0(struct gateway_data, 1);
 263         if (data == NULL)
 264                 return;
 265
 266         data->index = index;
 267         data->gateway = g_strdup(gateway);
 268
 269         gateway_list = g_slist_append(gateway_list, data);
 270
 271         __connman_element_foreach(NULL, CONNMAN_ELEMENT_TYPE_CONNECTION,
 272                                                         set_default, data);
 273 }
 274
 275 static void connection_delgateway(int index, const char *gateway)
 276 {
 277         struct gateway_data *data;
 278
 279         DBG("index %d gateway %s", index, gateway);
 280
 281         data = find_gateway(index, gateway);
 282         if (data == NULL)
 283                 return;
 284
 285         gateway_list = g_slist_remove(gateway_list, data);
 286
 287         __connman_element_foreach(NULL, CONNMAN_ELEMENT_TYPE_CONNECTION,
 288                                                         del_default, data);
 289
 290         g_free(data->gateway);
 291         g_free(data);
 292
 293         if (g_slist_length(gateway_list) > 0)
 294                 return;
 295
 296         DBG("selecting new default gateway");
 297
 298         __connman_element_foreach(NULL, CONNMAN_ELEMENT_TYPE_CONNECTION,
 299                                                         new_default, NULL);
 300 }
 301
 302 static struct connman_rtnl connection_rtnl = {
 303         .name           = "connection",
 304         .newgateway     = connection_newgateway,
 305         .delgateway     = connection_delgateway,
 306 };
 307
 308 static DBusMessage *get_properties(DBusConnection *conn,
 309                                         DBusMessage *msg, void *data)
 310 {
 311         struct connman_element *element = data;
 312         DBusMessage *reply;
 313         DBusMessageIter array, dict;
 314         connman_uint8_t strength;
 315         const char *device, *network;
 316         const char *type;
 317
 318         DBG("conn %p", conn);
 319
 320         if (__connman_security_check_privilege(msg,
 321                                         CONNMAN_SECURITY_PRIVILEGE_PUBLIC) < 0)
 322                 return __connman_error_permission_denied(msg);
 323
 324         reply = dbus_message_new_method_return(msg);
 325         if (reply == NULL)
 326                 return NULL;
 327
 328         dbus_message_iter_init_append(reply, &array);
 329
 330         dbus_message_iter_open_container(&array, DBUS_TYPE_ARRAY,
 331                         DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING
 332                         DBUS_TYPE_STRING_AS_STRING DBUS_TYPE_VARIANT_AS_STRING
 333                         DBUS_DICT_ENTRY_END_CHAR_AS_STRING, &dict);
 334
 335         type = connman_element_get_string(element, "Type");
 336         if (type != NULL)
 337                 connman_dbus_dict_append_variant(&dict, "Type",
 338                                                 DBUS_TYPE_STRING, &type);
 339
 340         strength = connman_element_get_uint8(element, "Strength");
 341         if (strength > 0)
 342                 connman_dbus_dict_append_variant(&dict, "Strength",
 343                                                 DBUS_TYPE_BYTE, &strength);
 344
 345         if (element->devname != NULL)
 346                 connman_dbus_dict_append_variant(&dict, "Interface",
 347                                         DBUS_TYPE_STRING, &element->devname);
 348
 349         connman_dbus_dict_append_variant(&dict, "Default",
 350                                         DBUS_TYPE_BOOLEAN, &element->enabled);
 351
 352         device = __connman_element_get_device_path(element);
 353         if (device != NULL)
 354                 connman_dbus_dict_append_variant(&dict, "Device",
 355                                         DBUS_TYPE_OBJECT_PATH, &device);
 356
 357         network = __connman_element_get_network_path(element);
 358         if (network != NULL)
 359                 connman_dbus_dict_append_variant(&dict, "Network",
 360                                         DBUS_TYPE_OBJECT_PATH, &network);
 361
 362         __connman_element_append_ipv4(element, &dict);
 363
 364         dbus_message_iter_close_container(&array, &dict);
 365
 366         return reply;
 367 }
 368
 369 static DBusMessage *set_property(DBusConnection *conn,
 370                                         DBusMessage *msg, void *data)
 371 {
 372         DBusMessageIter iter, value;
 373         const char *name;
 374         int type;
 375
 376         DBG("conn %p", conn);
 377
 378         if (dbus_message_iter_init(msg, &iter) == FALSE)
 379                 return __connman_error_invalid_arguments(msg);
 380
 381         dbus_message_iter_get_basic(&iter, &name);
 382         dbus_message_iter_next(&iter);
 383         dbus_message_iter_recurse(&iter, &value);
 384
 385         if (__connman_security_check_privilege(msg,
 386                                         CONNMAN_SECURITY_PRIVILEGE_MODIFY) < 0)
 387                 return __connman_error_permission_denied(msg);
 388
 389         type = dbus_message_iter_get_arg_type(&value);
 390
 391         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
 392 }
 393
 394 static GDBusMethodTable connection_methods[] = {
 395         { "GetProperties", "",   "a{sv}", get_properties },
 396         { "SetProperty",   "sv", "",      set_property   },
 397         { },
 398 };
 399
 400 static GDBusSignalTable connection_signals[] = {
 401         { "PropertyChanged", "sv" },
 402         { },
 403 };
 404
 405 static void append_connections(DBusMessageIter *entry)
 406 {
 407         DBusMessageIter value, iter;
 408         const char *key = "Connections";
 409
 410         dbus_message_iter_append_basic(entry, DBUS_TYPE_STRING, &key);
 411
 412         dbus_message_iter_open_container(entry, DBUS_TYPE_VARIANT,
 413                 DBUS_TYPE_ARRAY_AS_STRING DBUS_TYPE_OBJECT_PATH_AS_STRING,
 414                                                                 &value);
 415
 416         dbus_message_iter_open_container(&value, DBUS_TYPE_ARRAY,
 417                                 DBUS_TYPE_OBJECT_PATH_AS_STRING, &iter);
 418         __connman_element_list(NULL, CONNMAN_ELEMENT_TYPE_CONNECTION, &iter);
 419         dbus_message_iter_close_container(&value, &iter);
 420
 421         dbus_message_iter_close_container(entry, &value);
 422 }
 423
 424 static void emit_connections_signal(void)
 425 {
 426         DBusMessage *signal;
 427         DBusMessageIter entry;
 428
 429         signal = dbus_message_new_signal(CONNMAN_MANAGER_PATH,
 430                                 CONNMAN_MANAGER_INTERFACE, "PropertyChanged");
 431         if (signal == NULL)
 432                 return;
 433
 434         dbus_message_iter_init_append(signal, &entry);
 435
 436         append_connections(&entry);
 437
 438         g_dbus_send_message(connection, signal);
 439 }
 440
 441 static int register_interface(struct connman_element *element)
 442 {
 443         DBG("element %p name %s", element, element->name);
 444
 445         if (g_dbus_register_interface(connection, element->path,
 446                                         CONNMAN_CONNECTION_INTERFACE,
 447                                         connection_methods, connection_signals,
 448                                         NULL, element, NULL) == FALSE) {
 449                 connman_error("Failed to register %s connection", element->path);
 450                 return -EIO;
 451         }
 452
 453         emit_connections_signal();
 454
 455         return 0;
 456 }
 457
 458 static void unregister_interface(struct connman_element *element)
 459 {
 460         DBG("element %p name %s", element, element->name);
 461
 462         emit_connections_signal();
 463
 464         g_dbus_unregister_interface(connection, element->path,
 465                                                 CONNMAN_CONNECTION_INTERFACE);
 466 }
 467
 468 static int connection_probe(struct connman_element *element)
 469 {
 470         struct connman_service *service;
 471         const char *gateway = NULL;
 472
 473         DBG("element %p name %s", element, element->name);
 474
 475         if (element->parent == NULL)
 476                 return -ENODEV;
 477
 478         if (element->parent->type != CONNMAN_ELEMENT_TYPE_IPV4)
 479                 return -ENODEV;
 480
 481         connman_element_get_value(element,
 482                                 CONNMAN_PROPERTY_ID_IPV4_GATEWAY, &gateway);
 483
 484         DBG("gateway %s", gateway);
 485
 486         if (register_interface(element) < 0)
 487                 return -ENODEV;
 488
 489         service = __connman_element_get_service(element);
 490         __connman_service_indicate_state(service,
 491                                         CONNMAN_SERVICE_STATE_READY);
 492
 493         if (gateway == NULL)
 494                 return 0;
 495
 496         if (find_gateway(element->index, gateway) != NULL) {
 497                 DBG("previous gateway still present");
 498                 goto done;
 499         }
 500
 501         if (g_slist_length(gateway_list) > 0) {
 502                 DBG("default gateway already present");
 503                 return 0;
 504         }
 505
 506         set_route(element, gateway);
 507
 508 done:
 509         connman_element_set_enabled(element, TRUE);
 510         emit_default_signal(element);
 511
 512         return 0;
 513 }
 514
 515 static void connection_remove(struct connman_element *element)
 516 {
 517         struct connman_service *service;
 518         const char *gateway = NULL;
 519
 520         DBG("element %p name %s", element, element->name);
 521
 522         service = __connman_element_get_service(element);
 523         __connman_service_indicate_state(service,
 524                                         CONNMAN_SERVICE_STATE_DISCONNECT);
 525
 526         unregister_interface(element);
 527
 528         connman_element_get_value(element,
 529                                 CONNMAN_PROPERTY_ID_IPV4_GATEWAY, &gateway);
 530
 531         DBG("gateway %s", gateway);
 532
 533         if (gateway == NULL)
 534                 return;
 535
 536         remove_gateway(element->index, gateway);
 537
 538         connman_element_set_enabled(element, FALSE);
 539         emit_default_signal(element);
 540
 541         del_route(element, gateway);
 542 }
 543
 544 static struct connman_driver connection_driver = {
 545         .name           = "connection",
 546         .type           = CONNMAN_ELEMENT_TYPE_CONNECTION,
 547         .priority       = CONNMAN_DRIVER_PRIORITY_LOW,
 548         .probe          = connection_probe,
 549         .remove         = connection_remove,
 550 };
 551
 552 int __connman_connection_init(void)
 553 {
 554         DBG("");
 555
 556         connection = connman_dbus_get_connection();
 557
 558         if (connman_rtnl_register(&connection_rtnl) < 0)
 559                 connman_error("Failed to setup RTNL gateway driver");
 560
 561         connman_rtnl_send_getroute();
 562
 563         return connman_driver_register(&connection_driver);
 564 }
 565
 566 void __connman_connection_cleanup(void)
 567 {
 568         GSList *list;
 569
 570         DBG("");
 571
 572         connman_driver_unregister(&connection_driver);
 573
 574         connman_rtnl_unregister(&connection_rtnl);
 575
 576         for (list = gateway_list; list; list = list->next) {
 577                 struct gateway_data *data = list->data;
 578
 579                 DBG("index %d gateway %s", data->index, data->gateway);
 580
 581                 g_free(data->gateway);
 582                 g_free(data);
 583                 list->data = NULL;
 584         }
 585
 586         g_slist_free(gateway_list);
 587         gateway_list = NULL;
 588
 589         dbus_connection_unref(connection);
 590 }