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 connection_newgateway(int index, const char *gateway)
  67 {
  68         struct gateway_data *data;
  69
  70         DBG("index %d gateway %s", index, gateway);
  71
  72         data = find_gateway(index, gateway);
  73         if (data != NULL)
  74                 return;
  75
  76         data = g_try_new0(struct gateway_data, 1);
  77         if (data == NULL)
  78                 return;
  79
  80         data->index = index;
  81         data->gateway = g_strdup(gateway);
  82
  83         gateway_list = g_slist_append(gateway_list, data);
  84 }
  85
  86 static void connection_delgateway(int index, const char *gateway)
  87 {
  88         struct gateway_data *data;
  89
  90         DBG("index %d gateway %s", index, gateway);
  91
  92         data = find_gateway(index, gateway);
  93         if (data == NULL)
  94                 return;
  95
  96         gateway_list = g_slist_remove(gateway_list, data);
  97
  98         g_free(data->gateway);
  99         g_free(data);
 100 }
 101
 102 static struct connman_rtnl connection_rtnl = {
 103         .name           = "connection",
 104         .newgateway     = connection_newgateway,
 105         .delgateway     = connection_delgateway,
 106 };
 107
 108 static int set_route(struct connman_element *element, const char *gateway)
 109 {
 110         struct ifreq ifr;
 111         struct rtentry rt;
 112         struct sockaddr_in *addr;
 113         int sk, err;
 114
 115         DBG("element %p", element);
 116
 117         sk = socket(PF_INET, SOCK_DGRAM, 0);
 118         if (sk < 0)
 119                 return -1;
 120
 121         memset(&ifr, 0, sizeof(ifr));
 122         ifr.ifr_ifindex = element->index;
 123
 124         if (ioctl(sk, SIOCGIFNAME, &ifr) < 0) {
 125                 close(sk);
 126                 return -1;
 127         }
 128
 129         DBG("ifname %s", ifr.ifr_name);
 130
 131         memset(&rt, 0, sizeof(rt));
 132         rt.rt_flags = RTF_UP | RTF_GATEWAY;
 133
 134         addr = (struct sockaddr_in *) &rt.rt_dst;
 135         addr->sin_family = AF_INET;
 136         addr->sin_addr.s_addr = INADDR_ANY;
 137
 138         addr = (struct sockaddr_in *) &rt.rt_gateway;
 139         addr->sin_family = AF_INET;
 140         addr->sin_addr.s_addr = inet_addr(gateway);
 141
 142         addr = (struct sockaddr_in *) &rt.rt_genmask;
 143         addr->sin_family = AF_INET;
 144         addr->sin_addr.s_addr = INADDR_ANY;
 145
 146         err = ioctl(sk, SIOCADDRT, &rt);
 147         if (err < 0)
 148                 DBG("default route setting failed (%s)", strerror(errno));
 149
 150         close(sk);
 151
 152         return err;
 153 }
 154
 155 static int del_route(struct connman_element *element, const char *gateway)
 156 {
 157         struct ifreq ifr;
 158         struct rtentry rt;
 159         struct sockaddr_in *addr;
 160         int sk, err;
 161
 162         DBG("element %p", element);
 163
 164         sk = socket(PF_INET, SOCK_DGRAM, 0);
 165         if (sk < 0)
 166                 return -1;
 167
 168         memset(&ifr, 0, sizeof(ifr));
 169         ifr.ifr_ifindex = element->index;
 170
 171         if (ioctl(sk, SIOCGIFNAME, &ifr) < 0) {
 172                 close(sk);
 173                 return -1;
 174         }
 175
 176         DBG("ifname %s", ifr.ifr_name);
 177
 178         memset(&rt, 0, sizeof(rt));
 179         rt.rt_flags = RTF_UP | RTF_GATEWAY;
 180
 181         addr = (struct sockaddr_in *) &rt.rt_dst;
 182         addr->sin_family = AF_INET;
 183         addr->sin_addr.s_addr = INADDR_ANY;
 184
 185         addr = (struct sockaddr_in *) &rt.rt_gateway;
 186         addr->sin_family = AF_INET;
 187         addr->sin_addr.s_addr = inet_addr(gateway);
 188
 189         addr = (struct sockaddr_in *) &rt.rt_genmask;
 190         addr->sin_family = AF_INET;
 191         addr->sin_addr.s_addr = INADDR_ANY;
 192
 193         err = ioctl(sk, SIOCDELRT, &rt);
 194         if (err < 0)
 195                 DBG("default route removal failed (%s)", strerror(errno));
 196
 197         close(sk);
 198
 199         return err;
 200 }
 201
 202 static DBusMessage *get_properties(DBusConnection *conn,
 203                                         DBusMessage *msg, void *data)
 204 {
 205         struct connman_element *element = data;
 206         DBusMessage *reply;
 207         DBusMessageIter array, dict;
 208         connman_uint8_t strength = 0;
 209         const char *device, *network;
 210         const char *type = NULL, *method = NULL;
 211         const char *address = NULL, *netmask = NULL, *gateway = NULL;
 212
 213         DBG("conn %p", conn);
 214
 215         if (__connman_security_check_privilege(msg,
 216                                         CONNMAN_SECURITY_PRIVILEGE_PUBLIC) < 0)
 217                 return __connman_error_permission_denied(msg);
 218
 219         reply = dbus_message_new_method_return(msg);
 220         if (reply == NULL)
 221                 return NULL;
 222
 223         dbus_message_iter_init_append(reply, &array);
 224
 225         dbus_message_iter_open_container(&array, DBUS_TYPE_ARRAY,
 226                         DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING
 227                         DBUS_TYPE_STRING_AS_STRING DBUS_TYPE_VARIANT_AS_STRING
 228                         DBUS_DICT_ENTRY_END_CHAR_AS_STRING, &dict);
 229
 230         connman_element_get_static_property(element, "Type", &type);
 231
 232         if (type != NULL)
 233                 connman_dbus_dict_append_variant(&dict, "Type",
 234                                                 DBUS_TYPE_STRING, &type);
 235
 236         connman_element_get_static_property(element, "Strength", &strength);
 237         if (strength > 0)
 238                 connman_dbus_dict_append_variant(&dict, "Strength",
 239                                                 DBUS_TYPE_BYTE, &strength);
 240
 241         if (element->devname != NULL)
 242                 connman_dbus_dict_append_variant(&dict, "Interface",
 243                                         DBUS_TYPE_STRING, &element->devname);
 244
 245         connman_dbus_dict_append_variant(&dict, "Default",
 246                                         DBUS_TYPE_BOOLEAN, &element->enabled);
 247
 248         device = __connman_element_get_device(element);
 249         if (device != NULL)
 250                 connman_dbus_dict_append_variant(&dict, "Device",
 251                                         DBUS_TYPE_OBJECT_PATH, &device);
 252
 253         network = __connman_element_get_network(element);
 254         if (network != NULL)
 255                 connman_dbus_dict_append_variant(&dict, "Network",
 256                                         DBUS_TYPE_OBJECT_PATH, &network);
 257
 258         connman_element_get_value(element,
 259                                 CONNMAN_PROPERTY_ID_IPV4_METHOD, &method);
 260
 261         connman_element_get_value(element,
 262                                 CONNMAN_PROPERTY_ID_IPV4_ADDRESS, &address);
 263         connman_element_get_value(element,
 264                                 CONNMAN_PROPERTY_ID_IPV4_NETMASK, &netmask);
 265         connman_element_get_value(element,
 266                                 CONNMAN_PROPERTY_ID_IPV4_GATEWAY, &gateway);
 267
 268         if (method != NULL)
 269                 connman_dbus_dict_append_variant(&dict, "IPv4.Method",
 270                                                 DBUS_TYPE_STRING, &method);
 271
 272         if (address != NULL)
 273                 connman_dbus_dict_append_variant(&dict, "IPv4.Address",
 274                                                 DBUS_TYPE_STRING, &address);
 275
 276         if (netmask != NULL)
 277                 connman_dbus_dict_append_variant(&dict, "IPv4.Netmask",
 278                                                 DBUS_TYPE_STRING, &netmask);
 279
 280         if (gateway != NULL)
 281                 connman_dbus_dict_append_variant(&dict, "IPv4.Gateway",
 282                                                 DBUS_TYPE_STRING, &gateway);
 283
 284         dbus_message_iter_close_container(&array, &dict);
 285
 286         return reply;
 287 }
 288
 289 static DBusMessage *set_property(DBusConnection *conn,
 290                                         DBusMessage *msg, void *data)
 291 {
 292         DBusMessageIter iter, value;
 293         const char *name;
 294         int type;
 295
 296         DBG("conn %p", conn);
 297
 298         if (dbus_message_iter_init(msg, &iter) == FALSE)
 299                 return __connman_error_invalid_arguments(msg);
 300
 301         dbus_message_iter_get_basic(&iter, &name);
 302         dbus_message_iter_next(&iter);
 303         dbus_message_iter_recurse(&iter, &value);
 304
 305         if (__connman_security_check_privilege(msg,
 306                                         CONNMAN_SECURITY_PRIVILEGE_MODIFY) < 0)
 307                 return __connman_error_permission_denied(msg);
 308
 309         type = dbus_message_iter_get_arg_type(&value);
 310
 311         return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
 312 }
 313
 314 static GDBusMethodTable connection_methods[] = {
 315         { "GetProperties", "",   "a{sv}", get_properties },
 316         { "SetProperty",   "sv", "",      set_property   },
 317         { },
 318 };
 319
 320 static GDBusSignalTable connection_signals[] = {
 321         { "PropertyChanged", "sv" },
 322         { },
 323 };
 324
 325 static DBusConnection *connection;
 326
 327 static void emit_connections_signal(void)
 328 {
 329 }
 330
 331 static int register_interface(struct connman_element *element)
 332 {
 333         DBG("element %p name %s", element, element->name);
 334
 335         if (g_dbus_register_interface(connection, element->path,
 336                                         CONNMAN_CONNECTION_INTERFACE,
 337                                         connection_methods, connection_signals,
 338                                         NULL, element, NULL) == FALSE) {
 339                 connman_error("Failed to register %s connection", element->path);
 340                 return -EIO;
 341         }
 342
 343         emit_connections_signal();
 344
 345         return 0;
 346 }
 347
 348 static void unregister_interface(struct connman_element *element)
 349 {
 350         DBG("element %p name %s", element, element->name);
 351
 352         emit_connections_signal();
 353
 354         g_dbus_unregister_interface(connection, element->path,
 355                                                 CONNMAN_CONNECTION_INTERFACE);
 356 }
 357
 358 static int connection_probe(struct connman_element *element)
 359 {
 360         const char *gateway = NULL;
 361
 362         DBG("element %p name %s", element, element->name);
 363
 364         if (element->parent == NULL)
 365                 return -ENODEV;
 366
 367         if (element->parent->type != CONNMAN_ELEMENT_TYPE_IPV4)
 368                 return -ENODEV;
 369
 370         connman_element_get_value(element,
 371                                 CONNMAN_PROPERTY_ID_IPV4_GATEWAY, &gateway);
 372
 373         DBG("gateway %s", gateway);
 374
 375         if (register_interface(element) < 0)
 376                 return -ENODEV;
 377
 378         if (gateway == NULL)
 379                 return 0;
 380
 381         if (g_slist_length(gateway_list) > 0) {
 382                 DBG("default gateway already present");
 383                 return 0;
 384         }
 385
 386         set_route(element, gateway);
 387
 388         connman_element_set_enabled(element, TRUE);
 389
 390         return 0;
 391 }
 392
 393 static void connection_remove(struct connman_element *element)
 394 {
 395         const char *gateway = NULL;
 396
 397         DBG("element %p name %s", element, element->name);
 398
 399         unregister_interface(element);
 400
 401         connman_element_get_value(element,
 402                                 CONNMAN_PROPERTY_ID_IPV4_GATEWAY, &gateway);
 403
 404         DBG("gateway %s", gateway);
 405
 406         if (gateway == NULL)
 407                 return;
 408
 409         del_route(element, gateway);
 410 }
 411
 412 static struct connman_driver connection_driver = {
 413         .name           = "connection",
 414         .type           = CONNMAN_ELEMENT_TYPE_CONNECTION,
 415         .priority       = CONNMAN_DRIVER_PRIORITY_LOW,
 416         .probe          = connection_probe,
 417         .remove         = connection_remove,
 418 };
 419
 420 int __connman_connection_init(void)
 421 {
 422         DBG("");
 423
 424         connection = connman_dbus_get_connection();
 425
 426         if (connman_rtnl_register(&connection_rtnl) < 0)
 427                 connman_error("Failed to setup RTNL gateway driver");
 428
 429         connman_rtnl_send_getroute();
 430
 431         return connman_driver_register(&connection_driver);
 432 }
 433
 434 void __connman_connection_cleanup(void)
 435 {
 436         GSList *list;
 437
 438         DBG("");
 439
 440         connman_driver_unregister(&connection_driver);
 441
 442         connman_rtnl_unregister(&connection_rtnl);
 443
 444         for (list = gateway_list; list; list = list->next) {
 445                 struct gateway_data *data = list->data;
 446
 447                 DBG("index %d gateway %s", data->index, data->gateway);
 448
 449                 g_free(data->gateway);
 450                 g_free(data);
 451                 list->data = NULL;
 452         }
 453
 454         g_slist_free(gateway_list);
 455         gateway_list = NULL;
 456
 457         dbus_connection_unref(connection);
 458 }