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