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;
 304         const char *device, *network;
 305         const char *type;
 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         type = connman_element_get_string(element, "Type");
 325         if (type != NULL)
 326                 connman_dbus_dict_append_variant(&dict, "Type",
 327                                                 DBUS_TYPE_STRING, &type);
 328
 329         strength = connman_element_get_uint8(element, "Strength");
 330         if (strength > 0)
 331                 connman_dbus_dict_append_variant(&dict, "Strength",
 332                                                 DBUS_TYPE_BYTE, &strength);
 333
 334         if (element->devname != NULL)
 335                 connman_dbus_dict_append_variant(&dict, "Interface",
 336                                         DBUS_TYPE_STRING, &element->devname);
 337
 338         connman_dbus_dict_append_variant(&dict, "Default",
 339                                         DBUS_TYPE_BOOLEAN, &element->enabled);
 340
 341         device = __connman_element_get_device(element);
 342         if (device != NULL)
 343                 connman_dbus_dict_append_variant(&dict, "Device",
 344                                         DBUS_TYPE_OBJECT_PATH, &device);
 345
 346         network = __connman_element_get_network(element);
 347         if (network != NULL)
 348                 connman_dbus_dict_append_variant(&dict, "Network",
 349                                         DBUS_TYPE_OBJECT_PATH, &network);
 350
 351         __connman_element_append_ipv4(element, &dict);
 352
 353         dbus_message_iter_close_container(&array, &dict);
 354
 355         return reply;
 356 }
 357
 358 static DBusMessage *set_property(DBusConnection *conn,
 359                                         DBusMessage *msg, void *data)
 360 {
 361         DBusMessageIter iter, value;
 362         const char *name;
 363         int type;
 364
 365         DBG("conn %p", conn);
 366
 367         if (dbus_message_iter_init(msg, &iter) == FALSE)
 368                 return __connman_error_invalid_arguments(msg);
 369
 370         dbus_message_iter_get_basic(&iter, &name);
 371         dbus_message_iter_next(&iter);
 372         dbus_message_iter_recurse(&iter, &value);
 373
 374         if (__connman_security_check_privilege(msg,
 375                                         CONNMAN_SECURITY_PRIVILEGE_MODIFY) < 0)
 376                 return __connman_error_permission_denied(msg);
 377
 378         type = dbus_message_iter_get_arg_type(&value);
 379
 380         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
 381 }
 382
 383 static GDBusMethodTable connection_methods[] = {
 384         { "GetProperties", "",   "a{sv}", get_properties },
 385         { "SetProperty",   "sv", "",      set_property   },
 386         { },
 387 };
 388
 389 static GDBusSignalTable connection_signals[] = {
 390         { "PropertyChanged", "sv" },
 391         { },
 392 };
 393
 394 static void append_connections(DBusMessageIter *entry)
 395 {
 396         DBusMessageIter value, iter;
 397         const char *key = "Connections";
 398
 399         dbus_message_iter_append_basic(entry, DBUS_TYPE_STRING, &key);
 400
 401         dbus_message_iter_open_container(entry, DBUS_TYPE_VARIANT,
 402                 DBUS_TYPE_ARRAY_AS_STRING DBUS_TYPE_OBJECT_PATH_AS_STRING,
 403                                                                 &value);
 404
 405         dbus_message_iter_open_container(&value, DBUS_TYPE_ARRAY,
 406                                 DBUS_TYPE_OBJECT_PATH_AS_STRING, &iter);
 407         __connman_element_list(NULL, CONNMAN_ELEMENT_TYPE_CONNECTION, &iter);
 408         dbus_message_iter_close_container(&value, &iter);
 409
 410         dbus_message_iter_close_container(entry, &value);
 411 }
 412
 413 static void emit_connections_signal(void)
 414 {
 415         DBusMessage *signal;
 416         DBusMessageIter entry;
 417
 418         signal = dbus_message_new_signal(CONNMAN_MANAGER_PATH,
 419                                 CONNMAN_MANAGER_INTERFACE, "PropertyChanged");
 420         if (signal == NULL)
 421                 return;
 422
 423         dbus_message_iter_init_append(signal, &entry);
 424
 425         append_connections(&entry);
 426
 427         g_dbus_send_message(connection, signal);
 428 }
 429
 430 static int register_interface(struct connman_element *element)
 431 {
 432         DBG("element %p name %s", element, element->name);
 433
 434         if (g_dbus_register_interface(connection, element->path,
 435                                         CONNMAN_CONNECTION_INTERFACE,
 436                                         connection_methods, connection_signals,
 437                                         NULL, element, NULL) == FALSE) {
 438                 connman_error("Failed to register %s connection", element->path);
 439                 return -EIO;
 440         }
 441
 442         emit_connections_signal();
 443
 444         return 0;
 445 }
 446
 447 static void unregister_interface(struct connman_element *element)
 448 {
 449         DBG("element %p name %s", element, element->name);
 450
 451         emit_connections_signal();
 452
 453         g_dbus_unregister_interface(connection, element->path,
 454                                                 CONNMAN_CONNECTION_INTERFACE);
 455 }
 456
 457 static int connection_probe(struct connman_element *element)
 458 {
 459         const char *gateway = NULL;
 460
 461         DBG("element %p name %s", element, element->name);
 462
 463         if (element->parent == NULL)
 464                 return -ENODEV;
 465
 466         if (element->parent->type != CONNMAN_ELEMENT_TYPE_IPV4)
 467                 return -ENODEV;
 468
 469         connman_element_get_value(element,
 470                                 CONNMAN_PROPERTY_ID_IPV4_GATEWAY, &gateway);
 471
 472         DBG("gateway %s", gateway);
 473
 474         if (register_interface(element) < 0)
 475                 return -ENODEV;
 476
 477         if (gateway == NULL)
 478                 return 0;
 479
 480         if (find_gateway(element->index, gateway) != NULL) {
 481                 DBG("previous gateway still present");
 482                 goto done;
 483         }
 484
 485         if (g_slist_length(gateway_list) > 0) {
 486                 DBG("default gateway already present");
 487                 return 0;
 488         }
 489
 490         set_route(element, gateway);
 491
 492 done:
 493         connman_element_set_enabled(element, TRUE);
 494         emit_default_signal(element);
 495
 496         return 0;
 497 }
 498
 499 static void connection_remove(struct connman_element *element)
 500 {
 501         const char *gateway = NULL;
 502
 503         DBG("element %p name %s", element, element->name);
 504
 505         unregister_interface(element);
 506
 507         connman_element_get_value(element,
 508                                 CONNMAN_PROPERTY_ID_IPV4_GATEWAY, &gateway);
 509
 510         DBG("gateway %s", gateway);
 511
 512         if (gateway == NULL)
 513                 return;
 514
 515         connman_element_set_enabled(element, FALSE);
 516         emit_default_signal(element);
 517
 518         del_route(element, gateway);
 519 }
 520
 521 static struct connman_driver connection_driver = {
 522         .name           = "connection",
 523         .type           = CONNMAN_ELEMENT_TYPE_CONNECTION,
 524         .priority       = CONNMAN_DRIVER_PRIORITY_LOW,
 525         .probe          = connection_probe,
 526         .remove         = connection_remove,
 527 };
 528
 529 int __connman_connection_init(void)
 530 {
 531         DBG("");
 532
 533         connection = connman_dbus_get_connection();
 534
 535         if (connman_rtnl_register(&connection_rtnl) < 0)
 536                 connman_error("Failed to setup RTNL gateway driver");
 537
 538         connman_rtnl_send_getroute();
 539
 540         return connman_driver_register(&connection_driver);
 541 }
 542
 543 void __connman_connection_cleanup(void)
 544 {
 545         GSList *list;
 546
 547         DBG("");
 548
 549         connman_driver_unregister(&connection_driver);
 550
 551         connman_rtnl_unregister(&connection_rtnl);
 552
 553         for (list = gateway_list; list; list = list->next) {
 554                 struct gateway_data *data = list->data;
 555
 556                 DBG("index %d gateway %s", data->index, data->gateway);
 557
 558                 g_free(data->gateway);
 559                 g_free(data);
 560                 list->data = NULL;
 561         }
 562
 563         g_slist_free(gateway_list);
 564         gateway_list = NULL;
 565
 566         dbus_connection_unref(connection);
 567 }