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_HOST;
 102
 103         addr = (struct sockaddr_in *) &rt.rt_dst;
 104         addr->sin_family = AF_INET;
 105         addr->sin_addr.s_addr = inet_addr(gateway);
 106
 107         addr = (struct sockaddr_in *) &rt.rt_gateway;
 108         addr->sin_family = AF_INET;
 109         addr->sin_addr.s_addr = INADDR_ANY;
 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         rt.rt_dev = ifr.ifr_name;
 116
 117         err = ioctl(sk, SIOCADDRT, &rt);
 118         if (err < 0)
 119                 connman_error("Setting host gateway route failed (%s)",
 120                                                         strerror(errno));
 121
 122         memset(&rt, 0, sizeof(rt));
 123         rt.rt_flags = RTF_UP | RTF_GATEWAY;
 124
 125         addr = (struct sockaddr_in *) &rt.rt_dst;
 126         addr->sin_family = AF_INET;
 127         addr->sin_addr.s_addr = INADDR_ANY;
 128
 129         addr = (struct sockaddr_in *) &rt.rt_gateway;
 130         addr->sin_family = AF_INET;
 131         addr->sin_addr.s_addr = inet_addr(gateway);
 132
 133         addr = (struct sockaddr_in *) &rt.rt_genmask;
 134         addr->sin_family = AF_INET;
 135         addr->sin_addr.s_addr = INADDR_ANY;
 136
 137         err = ioctl(sk, SIOCADDRT, &rt);
 138         if (err < 0)
 139                 connman_error("Setting default route failed (%s)",
 140                                                         strerror(errno));
 141
 142         close(sk);
 143
 144         return err;
 145 }
 146
 147 static int del_route(struct connman_element *element, const char *gateway)
 148 {
 149         struct ifreq ifr;
 150         struct rtentry rt;
 151         struct sockaddr_in *addr;
 152         int sk, err;
 153
 154         DBG("element %p", element);
 155
 156         sk = socket(PF_INET, SOCK_DGRAM, 0);
 157         if (sk < 0)
 158                 return -1;
 159
 160         memset(&ifr, 0, sizeof(ifr));
 161         ifr.ifr_ifindex = element->index;
 162
 163         if (ioctl(sk, SIOCGIFNAME, &ifr) < 0) {
 164                 close(sk);
 165                 return -1;
 166         }
 167
 168         DBG("ifname %s", ifr.ifr_name);
 169
 170         memset(&rt, 0, sizeof(rt));
 171         rt.rt_flags = RTF_UP | RTF_GATEWAY;
 172
 173         addr = (struct sockaddr_in *) &rt.rt_dst;
 174         addr->sin_family = AF_INET;
 175         addr->sin_addr.s_addr = INADDR_ANY;
 176
 177         addr = (struct sockaddr_in *) &rt.rt_gateway;
 178         addr->sin_family = AF_INET;
 179         addr->sin_addr.s_addr = inet_addr(gateway);
 180
 181         addr = (struct sockaddr_in *) &rt.rt_genmask;
 182         addr->sin_family = AF_INET;
 183         addr->sin_addr.s_addr = INADDR_ANY;
 184
 185         err = ioctl(sk, SIOCDELRT, &rt);
 186         if (err < 0)
 187                 connman_error("Removing default route failed (%s)",
 188                                                         strerror(errno));
 189
 190         close(sk);
 191
 192         return err;
 193 }
 194
 195 static DBusConnection *connection;
 196
 197 static void emit_default_signal(struct connman_element *element)
 198 {
 199         DBusMessage *signal;
 200         DBusMessageIter entry, value;
 201         const char *key = "Default";
 202
 203         signal = dbus_message_new_signal(element->path,
 204                         CONNMAN_CONNECTION_INTERFACE, "PropertyChanged");
 205         if (signal == NULL)
 206                 return;
 207
 208         dbus_message_iter_init_append(signal, &entry);
 209
 210         dbus_message_iter_append_basic(&entry, DBUS_TYPE_STRING, &key);
 211
 212         dbus_message_iter_open_container(&entry, DBUS_TYPE_VARIANT,
 213                                         DBUS_TYPE_BOOLEAN_AS_STRING, &value);
 214         dbus_message_iter_append_basic(&value, DBUS_TYPE_BOOLEAN,
 215                                                         &element->enabled);
 216         dbus_message_iter_close_container(&entry, &value);
 217
 218         g_dbus_send_message(connection, signal);
 219 }
 220
 221 static void set_default(struct connman_element *element, gpointer user_data)
 222 {
 223         struct gateway_data *data = user_data;
 224
 225         DBG("element %p name %s", element, element->name);
 226
 227         if (element->index != data->index)
 228                 return;
 229
 230         if (element->enabled == TRUE)
 231                 return;
 232
 233         connman_element_set_enabled(element, TRUE);
 234         emit_default_signal(element);
 235 }
 236
 237 static void del_default(struct connman_element *element, gpointer user_data)
 238 {
 239         struct gateway_data *data = user_data;
 240
 241         DBG("element %p name %s", element, element->name);
 242
 243         if (element->index != data->index)
 244                 return;
 245
 246         if (element->enabled == FALSE)
 247                 return;
 248
 249         connman_element_set_enabled(element, FALSE);
 250         emit_default_signal(element);
 251 }
 252
 253 static void new_default(struct connman_element *element, gpointer user_data)
 254 {
 255         struct connman_service *service;
 256         const char *gateway;
 257
 258         DBG("element %p name %s", element, element->name);
 259
 260         if (g_slist_length(gateway_list) > 0)
 261                 return;
 262
 263         connman_element_get_value(element,
 264                                 CONNMAN_PROPERTY_ID_IPV4_GATEWAY, &gateway);
 265
 266         DBG("gateway %s", gateway);
 267
 268         if (gateway == NULL)
 269                 return;
 270
 271         if (set_route(element, gateway) < 0)
 272                 return;
 273
 274         service = __connman_element_get_service(element);
 275         __connman_service_indicate_default(service);
 276
 277         connman_element_set_enabled(element, TRUE);
 278         emit_default_signal(element);
 279 }
 280
 281 static void connection_newgateway(int index, const char *gateway)
 282 {
 283         struct gateway_data *data;
 284
 285         DBG("index %d gateway %s", index, gateway);
 286
 287         data = find_gateway(index, gateway);
 288         if (data != NULL)
 289                 return;
 290
 291         data = g_try_new0(struct gateway_data, 1);
 292         if (data == NULL)
 293                 return;
 294
 295         data->index = index;
 296         data->gateway = g_strdup(gateway);
 297
 298         gateway_list = g_slist_append(gateway_list, data);
 299
 300         __connman_element_foreach(NULL, CONNMAN_ELEMENT_TYPE_CONNECTION,
 301                                                         set_default, data);
 302 }
 303
 304 static void connection_delgateway(int index, const char *gateway)
 305 {
 306         struct gateway_data *data;
 307
 308         DBG("index %d gateway %s", index, gateway);
 309
 310         data = find_gateway(index, gateway);
 311         if (data == NULL)
 312                 return;
 313
 314         gateway_list = g_slist_remove(gateway_list, data);
 315
 316         __connman_element_foreach(NULL, CONNMAN_ELEMENT_TYPE_CONNECTION,
 317                                                         del_default, data);
 318
 319         g_free(data->gateway);
 320         g_free(data);
 321
 322         if (g_slist_length(gateway_list) > 0)
 323                 return;
 324
 325         DBG("selecting new default gateway");
 326
 327         __connman_element_foreach(NULL, CONNMAN_ELEMENT_TYPE_CONNECTION,
 328                                                         new_default, NULL);
 329 }
 330
 331 static struct connman_rtnl connection_rtnl = {
 332         .name           = "connection",
 333         .newgateway     = connection_newgateway,
 334         .delgateway     = connection_delgateway,
 335 };
 336
 337 static DBusMessage *get_properties(DBusConnection *conn,
 338                                         DBusMessage *msg, void *data)
 339 {
 340         struct connman_element *element = data;
 341         DBusMessage *reply;
 342         DBusMessageIter array, dict;
 343         connman_uint8_t strength;
 344         const char *device, *network;
 345         const char *type;
 346
 347         DBG("conn %p", conn);
 348
 349         if (__connman_security_check_privilege(msg,
 350                                         CONNMAN_SECURITY_PRIVILEGE_PUBLIC) < 0)
 351                 return __connman_error_permission_denied(msg);
 352
 353         reply = dbus_message_new_method_return(msg);
 354         if (reply == NULL)
 355                 return NULL;
 356
 357         dbus_message_iter_init_append(reply, &array);
 358
 359         dbus_message_iter_open_container(&array, DBUS_TYPE_ARRAY,
 360                         DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING
 361                         DBUS_TYPE_STRING_AS_STRING DBUS_TYPE_VARIANT_AS_STRING
 362                         DBUS_DICT_ENTRY_END_CHAR_AS_STRING, &dict);
 363
 364         type = connman_element_get_string(element, "Type");
 365         if (type != NULL)
 366                 connman_dbus_dict_append_variant(&dict, "Type",
 367                                                 DBUS_TYPE_STRING, &type);
 368
 369         strength = connman_element_get_uint8(element, "Strength");
 370         if (strength > 0)
 371                 connman_dbus_dict_append_variant(&dict, "Strength",
 372                                                 DBUS_TYPE_BYTE, &strength);
 373
 374         if (element->devname != NULL)
 375                 connman_dbus_dict_append_variant(&dict, "Interface",
 376                                         DBUS_TYPE_STRING, &element->devname);
 377
 378         connman_dbus_dict_append_variant(&dict, "Default",
 379                                         DBUS_TYPE_BOOLEAN, &element->enabled);
 380
 381         device = __connman_element_get_device_path(element);
 382         if (device != NULL)
 383                 connman_dbus_dict_append_variant(&dict, "Device",
 384                                         DBUS_TYPE_OBJECT_PATH, &device);
 385
 386         network = __connman_element_get_network_path(element);
 387         if (network != NULL)
 388                 connman_dbus_dict_append_variant(&dict, "Network",
 389                                         DBUS_TYPE_OBJECT_PATH, &network);
 390
 391         __connman_element_append_ipv4(element, &dict);
 392
 393         dbus_message_iter_close_container(&array, &dict);
 394
 395         return reply;
 396 }
 397
 398 static DBusMessage *set_property(DBusConnection *conn,
 399                                         DBusMessage *msg, void *data)
 400 {
 401         DBusMessageIter iter, value;
 402         const char *name;
 403         int type;
 404
 405         DBG("conn %p", conn);
 406
 407         if (dbus_message_iter_init(msg, &iter) == FALSE)
 408                 return __connman_error_invalid_arguments(msg);
 409
 410         dbus_message_iter_get_basic(&iter, &name);
 411         dbus_message_iter_next(&iter);
 412         dbus_message_iter_recurse(&iter, &value);
 413
 414         if (__connman_security_check_privilege(msg,
 415                                         CONNMAN_SECURITY_PRIVILEGE_MODIFY) < 0)
 416                 return __connman_error_permission_denied(msg);
 417
 418         type = dbus_message_iter_get_arg_type(&value);
 419
 420         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
 421 }
 422
 423 static GDBusMethodTable connection_methods[] = {
 424         { "GetProperties", "",   "a{sv}", get_properties },
 425         { "SetProperty",   "sv", "",      set_property   },
 426         { },
 427 };
 428
 429 static GDBusSignalTable connection_signals[] = {
 430         { "PropertyChanged", "sv" },
 431         { },
 432 };
 433
 434 static void append_connections(DBusMessageIter *entry)
 435 {
 436         DBusMessageIter value, iter;
 437         const char *key = "Connections";
 438
 439         dbus_message_iter_append_basic(entry, DBUS_TYPE_STRING, &key);
 440
 441         dbus_message_iter_open_container(entry, DBUS_TYPE_VARIANT,
 442                 DBUS_TYPE_ARRAY_AS_STRING DBUS_TYPE_OBJECT_PATH_AS_STRING,
 443                                                                 &value);
 444
 445         dbus_message_iter_open_container(&value, DBUS_TYPE_ARRAY,
 446                                 DBUS_TYPE_OBJECT_PATH_AS_STRING, &iter);
 447         __connman_element_list(NULL, CONNMAN_ELEMENT_TYPE_CONNECTION, &iter);
 448         dbus_message_iter_close_container(&value, &iter);
 449
 450         dbus_message_iter_close_container(entry, &value);
 451 }
 452
 453 static void emit_connections_signal(void)
 454 {
 455         DBusMessage *signal;
 456         DBusMessageIter entry;
 457
 458         signal = dbus_message_new_signal(CONNMAN_MANAGER_PATH,
 459                                 CONNMAN_MANAGER_INTERFACE, "PropertyChanged");
 460         if (signal == NULL)
 461                 return;
 462
 463         dbus_message_iter_init_append(signal, &entry);
 464
 465         append_connections(&entry);
 466
 467         g_dbus_send_message(connection, signal);
 468 }
 469
 470 static int register_interface(struct connman_element *element)
 471 {
 472         DBG("element %p name %s", element, element->name);
 473
 474         if (g_dbus_register_interface(connection, element->path,
 475                                         CONNMAN_CONNECTION_INTERFACE,
 476                                         connection_methods, connection_signals,
 477                                         NULL, element, NULL) == FALSE) {
 478                 connman_error("Failed to register %s connection", element->path);
 479                 return -EIO;
 480         }
 481
 482         emit_connections_signal();
 483
 484         return 0;
 485 }
 486
 487 static void unregister_interface(struct connman_element *element)
 488 {
 489         DBG("element %p name %s", element, element->name);
 490
 491         emit_connections_signal();
 492
 493         g_dbus_unregister_interface(connection, element->path,
 494                                                 CONNMAN_CONNECTION_INTERFACE);
 495 }
 496
 497 static int connection_probe(struct connman_element *element)
 498 {
 499         struct connman_service *service;
 500         const char *gateway = NULL;
 501
 502         DBG("element %p name %s", element, element->name);
 503
 504         if (element->parent == NULL)
 505                 return -ENODEV;
 506
 507         if (element->parent->type != CONNMAN_ELEMENT_TYPE_IPV4)
 508                 return -ENODEV;
 509
 510         connman_element_get_value(element,
 511                                 CONNMAN_PROPERTY_ID_IPV4_GATEWAY, &gateway);
 512
 513         DBG("gateway %s", gateway);
 514
 515         if (register_interface(element) < 0)
 516                 return -ENODEV;
 517
 518         service = __connman_element_get_service(element);
 519         __connman_service_indicate_state(service,
 520                                         CONNMAN_SERVICE_STATE_READY);
 521
 522         if (gateway == NULL)
 523                 return 0;
 524
 525         if (find_gateway(element->index, gateway) != NULL) {
 526                 DBG("previous gateway still present");
 527                 goto done;
 528         }
 529
 530         if (g_slist_length(gateway_list) > 0) {
 531                 DBG("default gateway already present");
 532                 return 0;
 533         }
 534
 535         if (set_route(element, gateway) < 0)
 536                 return 0;
 537
 538 done:
 539         service = __connman_element_get_service(element);
 540         __connman_service_indicate_default(service);
 541
 542         connman_element_set_enabled(element, TRUE);
 543         emit_default_signal(element);
 544
 545         return 0;
 546 }
 547
 548 static void connection_remove(struct connman_element *element)
 549 {
 550         struct connman_service *service;
 551         const char *gateway = NULL;
 552
 553         DBG("element %p name %s", element, element->name);
 554
 555         service = __connman_element_get_service(element);
 556         __connman_service_indicate_state(service,
 557                                         CONNMAN_SERVICE_STATE_DISCONNECT);
 558
 559         unregister_interface(element);
 560
 561         connman_element_get_value(element,
 562                                 CONNMAN_PROPERTY_ID_IPV4_GATEWAY, &gateway);
 563
 564         DBG("gateway %s", gateway);
 565
 566         if (gateway == NULL)
 567                 return;
 568
 569         remove_gateway(element->index, gateway);
 570
 571         connman_element_set_enabled(element, FALSE);
 572         emit_default_signal(element);
 573
 574         del_route(element, gateway);
 575 }
 576
 577 static struct connman_driver connection_driver = {
 578         .name           = "connection",
 579         .type           = CONNMAN_ELEMENT_TYPE_CONNECTION,
 580         .priority       = CONNMAN_DRIVER_PRIORITY_LOW,
 581         .probe          = connection_probe,
 582         .remove         = connection_remove,
 583 };
 584
 585 int __connman_connection_init(void)
 586 {
 587         DBG("");
 588
 589         connection = connman_dbus_get_connection();
 590
 591         if (connman_rtnl_register(&connection_rtnl) < 0)
 592                 connman_error("Failed to setup RTNL gateway driver");
 593
 594         connman_rtnl_send_getroute();
 595
 596         return connman_driver_register(&connection_driver);
 597 }
 598
 599 void __connman_connection_cleanup(void)
 600 {
 601         GSList *list;
 602
 603         DBG("");
 604
 605         connman_driver_unregister(&connection_driver);
 606
 607         connman_rtnl_unregister(&connection_rtnl);
 608
 609         for (list = gateway_list; list; list = list->next) {
 610                 struct gateway_data *data = list->data;
 611
 612                 DBG("index %d gateway %s", data->index, data->gateway);
 613
 614                 g_free(data->gateway);
 615                 g_free(data);
 616                 list->data = NULL;
 617         }
 618
 619         g_slist_free(gateway_list);
 620         gateway_list = NULL;
 621
 622         dbus_connection_unref(connection);
 623 }