plugins/vpn.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2012  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 <string.h>
  27 #include <errno.h>
  28 #include <sys/socket.h>
  29 #include <stdlib.h>
  30 #include <glib.h>
  31
  32 #include <gdbus.h>
  33
  34 #define CONNMAN_API_SUBJECT_TO_CHANGE
  35 #include <connman/technology.h>
  36 #include <connman/plugin.h>
  37 #include <connman/log.h>
  38 #include <connman/dbus.h>
  39 #include <connman/provider.h>
  40 #include <connman/ipaddress.h>
  41 #include <connman/vpn-dbus.h>
  42 #include <connman/inet.h>
  43 #include <gweb/gresolv.h>
  44
  45 #define DBUS_TIMEOUT 10000
  46
  47 static DBusConnection *connection;
  48
  49 static GHashTable *vpn_connections = NULL;
  50 static gboolean starting_vpnd = TRUE;
  51 static guint watch;
  52 static guint added_watch;
  53 static guint removed_watch;
  54 static guint property_watch;
  55
  56 struct vpn_route {
  57         int family;
  58         char *network;
  59         char *netmask;
  60         char *gateway;
  61 };
  62
  63 struct config_create_data {
  64         connection_ready_cb callback;
  65         DBusMessage *message;
  66         char *path;
  67 };
  68
  69 struct connection_data {
  70         char *path;
  71         char *ident;
  72         struct connman_provider *provider;
  73         int index;
  74         DBusPendingCall *call;
  75         connman_bool_t connect_pending;
  76         struct config_create_data *cb_data;
  77
  78         char *state;
  79         char *type;
  80         char *name;
  81         char *host;
  82         char **host_ip;
  83         char *domain;
  84         char **nameservers;
  85
  86         GHashTable *server_routes;
  87         GHashTable *user_routes;
  88         GHashTable *setting_strings;
  89
  90         struct connman_ipaddress *ip;
  91
  92         GResolv *resolv;
  93         guint resolv_id;
  94 };
  95
  96 static int set_string(struct connman_provider *provider,
  97                                         const char *key, const char *value)
  98 {
  99         struct connection_data *data;
 100
 101         data = connman_provider_get_data(provider);
 102         if (data == NULL)
 103                 return -EINVAL;
 104
 105         DBG("data %p provider %p key %s value %s", data, provider, key, value);
 106
 107         if (g_str_equal(key, "Type") == TRUE) {
 108                 g_free(data->type);
 109                 data->type = g_strdup(value);
 110         } else if (g_str_equal(key, "Name") == TRUE) {
 111                 g_free(data->name);
 112                 data->name = g_strdup(value);
 113         } else if (g_str_equal(key, "Host") == TRUE) {
 114                 g_free(data->host);
 115                 data->host = g_strdup(value);
 116         } else if (g_str_equal(key, "VPN.Domain") == TRUE ||
 117                                 g_str_equal(key, "Domain") == TRUE) {
 118                 g_free(data->domain);
 119                 data->domain = g_strdup(value);
 120         } else
 121                 g_hash_table_replace(data->setting_strings,
 122                                 g_strdup(key), g_strdup(value));
 123         return 0;
 124 }
 125
 126 static const char *get_string(struct connman_provider *provider,
 127                                                         const char *key)
 128 {
 129         struct connection_data *data;
 130
 131         data = connman_provider_get_data(provider);
 132         if (data == NULL)
 133                 return NULL;
 134
 135         DBG("data %p provider %p key %s", data, provider, key);
 136
 137         if (g_str_equal(key, "Type") == TRUE)
 138                 return data->type;
 139         else if (g_str_equal(key, "Name") == TRUE)
 140                 return data->name;
 141         else if (g_str_equal(key, "Host") == TRUE)
 142                 return data->host;
 143         else if (g_str_equal(key, "HostIP") == TRUE) {
 144                 if (data->host_ip == NULL ||
 145                                 data->host_ip[0] == NULL)
 146                         return data->host;
 147                 else
 148                         return data->host_ip[0];
 149         } else if (g_str_equal(key, "VPN.Domain") == TRUE)
 150                 return data->domain;
 151
 152         return g_hash_table_lookup(data->setting_strings, key);
 153 }
 154
 155 static char *get_ident(const char *path)
 156 {
 157         char *pos;
 158
 159         if (*path != '/')
 160                 return NULL;
 161
 162         pos = strrchr(path, '/');
 163         if (pos == NULL)
 164                 return NULL;
 165
 166         return pos + 1;
 167 }
 168
 169 static void cancel_host_resolv(struct connection_data *data)
 170 {
 171         if (data->resolv_id != 0)
 172                 g_resolv_cancel_lookup(data->resolv, data->resolv_id);
 173
 174         data->resolv_id = 0;
 175
 176         g_resolv_unref(data->resolv);
 177         data->resolv = NULL;
 178 }
 179
 180 static gboolean remove_resolv(gpointer user_data)
 181 {
 182         struct connection_data *data = user_data;
 183
 184         cancel_host_resolv(data);
 185
 186         return FALSE;
 187 }
 188
 189 static void resolv_result(GResolvResultStatus status,
 190                                         char **results, gpointer user_data)
 191 {
 192         struct connection_data *data = user_data;
 193
 194         DBG("status %d", status);
 195
 196         if (status == G_RESOLV_RESULT_STATUS_SUCCESS && results != NULL &&
 197                                                 g_strv_length(results) > 0)
 198                 data->host_ip = g_strdupv(results);
 199
 200         /*
 201          * We cannot unref the resolver here as resolv struct is manipulated
 202          * by gresolv.c after we return from this callback.
 203          */
 204         g_timeout_add_seconds(0, remove_resolv, data);
 205
 206         data->resolv_id = 0;
 207 }
 208
 209 static void resolv_host_addr(struct connection_data *data)
 210 {
 211         if (data->host == NULL)
 212                 return;
 213
 214         if (connman_inet_check_ipaddress(data->host) > 0)
 215                 return;
 216
 217         if (data->host_ip != NULL)
 218                 return;
 219
 220         data->resolv = g_resolv_new(0);
 221         if (data->resolv == NULL) {
 222                 DBG("Cannot resolv %s", data->host);
 223                 return;
 224         }
 225
 226         DBG("Trying to resolv %s", data->host);
 227
 228         data->resolv_id = g_resolv_lookup_hostname(data->resolv, data->host,
 229                                                 resolv_result, data);
 230 }
 231
 232 static void free_config_cb_data(struct config_create_data *cb_data)
 233 {
 234         if (cb_data == NULL)
 235                 return;
 236
 237         g_free(cb_data->path);
 238         cb_data->path = NULL;
 239
 240         if (cb_data->message != NULL) {
 241                 dbus_message_unref(cb_data->message);
 242                 cb_data->message = NULL;
 243         }
 244
 245         cb_data->callback = NULL;
 246
 247         g_free(cb_data);
 248 }
 249
 250 static void set_provider_state(struct connection_data *data)
 251 {
 252         enum connman_provider_state state = CONNMAN_PROVIDER_STATE_UNKNOWN;
 253         int err = 0;
 254
 255         if (g_str_equal(data->state, "ready") == TRUE) {
 256                 state = CONNMAN_PROVIDER_STATE_READY;
 257                 goto set;
 258         } else if (g_str_equal(data->state, "configuration") == TRUE) {
 259                 state = CONNMAN_PROVIDER_STATE_CONNECT;
 260         } else if (g_str_equal(data->state, "idle") == TRUE) {
 261                 state = CONNMAN_PROVIDER_STATE_IDLE;
 262         } else if (g_str_equal(data->state, "disconnect") == TRUE) {
 263                 err = ECONNREFUSED;
 264                 state = CONNMAN_PROVIDER_STATE_DISCONNECT;
 265                 goto set;
 266         } else if (g_str_equal(data->state, "failure") == TRUE) {
 267                 err = ECONNREFUSED;
 268                 state = CONNMAN_PROVIDER_STATE_FAILURE;
 269                 goto set;
 270         }
 271
 272         connman_provider_set_state(data->provider, state);
 273         return;
 274
 275 set:
 276         if (data->cb_data != NULL)
 277                 data->cb_data->callback(data->cb_data->message,
 278                                         err, data->ident);
 279
 280         connman_provider_set_state(data->provider, state);
 281
 282         free_config_cb_data(data->cb_data);
 283         data->cb_data = NULL;
 284 }
 285
 286 static int create_provider(struct connection_data *data, void *user_data)
 287 {
 288         struct connman_provider_driver *driver = user_data;
 289         int err;
 290
 291         DBG("%s", data->path);
 292
 293         data->provider = connman_provider_get(data->ident);
 294         if (data->provider == NULL)
 295                 return -ENOMEM;
 296
 297         DBG("provider %p name %s", data->provider, data->name);
 298
 299         connman_provider_set_data(data->provider, data);
 300         connman_provider_set_driver(data->provider, driver);
 301
 302         err = connman_provider_create_service(data->provider);
 303         if (err == 0) {
 304                 if (g_str_equal(data->state, "ready") == TRUE) {
 305                         connman_provider_set_index(data->provider,
 306                                                         data->index);
 307                         if (data->ip != NULL)
 308                                 connman_provider_set_ipaddress(data->provider,
 309                                                                 data->ip);
 310                 }
 311
 312                 set_provider_state(data);
 313         }
 314
 315         return 0;
 316 }
 317
 318 static void destroy_route(gpointer user_data)
 319 {
 320         struct vpn_route *route = user_data;
 321
 322         g_free(route->network);
 323         g_free(route->netmask);
 324         g_free(route->gateway);
 325         g_free(route);
 326 }
 327
 328 static struct connection_data *create_connection_data(const char *path)
 329 {
 330         struct connection_data *data;
 331
 332         data = g_try_new0(struct connection_data, 1);
 333         if (data == NULL)
 334                 return NULL;
 335
 336         DBG("path %s", path);
 337
 338         data->path = g_strdup(path);
 339         data->ident = g_strdup(get_ident(path));
 340         data->index = -1;
 341
 342         data->setting_strings = g_hash_table_new_full(g_str_hash,
 343                                                 g_str_equal, g_free, g_free);
 344
 345         data->server_routes = g_hash_table_new_full(g_direct_hash,
 346                                         g_str_equal, g_free, destroy_route);
 347         data->user_routes = g_hash_table_new_full(g_str_hash,
 348                                         g_str_equal, g_free, destroy_route);
 349
 350         return data;
 351 }
 352
 353 static int extract_ip(DBusMessageIter *array, int family,
 354                                                 struct connection_data *data)
 355 {
 356         DBusMessageIter dict;
 357         char *address = NULL, *gateway = NULL, *netmask = NULL, *peer = NULL;
 358         unsigned char prefix_len;
 359
 360         if (dbus_message_iter_get_arg_type(array) != DBUS_TYPE_ARRAY)
 361                 return -EINVAL;
 362
 363         dbus_message_iter_recurse(array, &dict);
 364
 365         while (dbus_message_iter_get_arg_type(&dict) == DBUS_TYPE_DICT_ENTRY) {
 366                 DBusMessageIter entry, value;
 367                 const char *key;
 368
 369                 dbus_message_iter_recurse(&dict, &entry);
 370                 dbus_message_iter_get_basic(&entry, &key);
 371
 372                 dbus_message_iter_next(&entry);
 373                 dbus_message_iter_recurse(&entry, &value);
 374
 375                 if (g_str_equal(key, "Address") == TRUE) {
 376                         dbus_message_iter_get_basic(&value, &address);
 377                         DBG("address %s", address);
 378                 } else if (g_str_equal(key, "Netmask") == TRUE) {
 379                         dbus_message_iter_get_basic(&value, &netmask);
 380                         DBG("netmask %s", netmask);
 381                 } else if (g_str_equal(key, "PrefixLength") == TRUE) {
 382                         dbus_message_iter_get_basic(&value, &netmask);
 383                         DBG("prefix length %s", netmask);
 384                 } else if (g_str_equal(key, "Peer") == TRUE) {
 385                         dbus_message_iter_get_basic(&value, &peer);
 386                         DBG("peer %s", peer);
 387                 } else if (g_str_equal(key, "Gateway") == TRUE) {
 388                         dbus_message_iter_get_basic(&value, &gateway);
 389                         DBG("gateway %s", gateway);
 390                 }
 391
 392                 dbus_message_iter_next(&dict);
 393         }
 394
 395         data->ip = connman_ipaddress_alloc(family);
 396         if (data->ip == NULL)
 397                 return -ENOMEM;
 398
 399         switch (family) {
 400         case AF_INET:
 401                 connman_ipaddress_set_ipv4(data->ip, address, netmask,
 402                                                                 gateway);
 403                 break;
 404         case AF_INET6:
 405                 prefix_len = atoi(netmask);
 406                 connman_ipaddress_set_ipv6(data->ip, address, prefix_len,
 407                                                                 gateway);
 408                 break;
 409         default:
 410                 return -EINVAL;
 411         }
 412
 413         connman_ipaddress_set_peer(data->ip, peer);
 414
 415         return 0;
 416 }
 417
 418 static int extract_nameservers(DBusMessageIter *array,
 419                                                 struct connection_data *data)
 420 {
 421         DBusMessageIter entry;
 422         char **nameservers = NULL;
 423         int i = 0;
 424
 425         dbus_message_iter_recurse(array, &entry);
 426
 427         while (dbus_message_iter_get_arg_type(&entry) == DBUS_TYPE_STRING) {
 428                 const char *nameserver;
 429
 430                 dbus_message_iter_get_basic(&entry, &nameserver);
 431
 432                 nameservers = g_try_renew(char *, nameservers, i + 2);
 433                 if (nameservers == NULL)
 434                         return -ENOMEM;
 435
 436                 DBG("[%d] %s", i, nameserver);
 437
 438                 nameservers[i] = g_strdup(nameserver);
 439                 if (nameservers[i] == NULL)
 440                         return -ENOMEM;
 441
 442                 nameservers[++i] = NULL;
 443
 444                 dbus_message_iter_next(&entry);
 445         }
 446
 447         g_strfreev(data->nameservers);
 448         data->nameservers = nameservers;
 449
 450         return 0;
 451 }
 452
 453 static void connect_reply(DBusPendingCall *call, void *user_data)
 454 {
 455         DBusMessage *reply;
 456         DBusError error;
 457         struct config_create_data *cb_data = user_data;
 458
 459         if (dbus_pending_call_get_completed(call) == FALSE)
 460                 return;
 461
 462         DBG("user_data %p path %s", user_data, cb_data ? cb_data->path : NULL);
 463
 464         reply = dbus_pending_call_steal_reply(call);
 465
 466         dbus_error_init(&error);
 467
 468         if (dbus_set_error_from_message(&error, reply) == TRUE) {
 469                 if (dbus_error_has_name(&error, CONNMAN_ERROR_INTERFACE
 470                                                 ".InProgress") == FALSE) {
 471                         connman_error("Connect reply: %s (%s)", error.message,
 472                                                                 error.name);
 473                         dbus_error_free(&error);
 474
 475                         if (cb_data != NULL) {
 476                                 cb_data->callback(cb_data->message,
 477                                                 ECONNREFUSED, NULL);
 478                                 free_config_cb_data(cb_data);
 479                         }
 480                         goto done;
 481                 }
 482                 dbus_error_free(&error);
 483         }
 484
 485         /*
 486          * The vpn connection is up when we get a "ready" state
 487          * property so at this point we do nothing for the provider
 488          * state.
 489          */
 490
 491 done:
 492         dbus_message_unref(reply);
 493
 494         dbus_pending_call_unref(call);
 495 }
 496
 497 static int connect_provider(struct connection_data *data, void *user_data)
 498 {
 499         DBusPendingCall *call;
 500         DBusMessage *message;
 501         struct config_create_data *cb_data = user_data;
 502
 503         DBG("data %p user %p path %s", data, cb_data, data->path);
 504
 505         message = dbus_message_new_method_call(VPN_SERVICE, data->path,
 506                                         VPN_CONNECTION_INTERFACE,
 507                                         VPN_CONNECT);
 508         if (message == NULL)
 509                 return -ENOMEM;
 510
 511         if (dbus_connection_send_with_reply(connection, message,
 512                                         &call, DBUS_TIMEOUT) == FALSE) {
 513                 connman_error("Unable to call %s.%s()",
 514                         VPN_CONNECTION_INTERFACE, VPN_CONNECT);
 515                 dbus_message_unref(message);
 516                 return -EINVAL;
 517         }
 518
 519         if (call == NULL) {
 520                 dbus_message_unref(message);
 521                 return -EINVAL;
 522         }
 523
 524         if (cb_data != NULL) {
 525                 g_free(cb_data->path);
 526                 cb_data->path = g_strdup(data->path);
 527         }
 528
 529         dbus_pending_call_set_notify(call, connect_reply, cb_data, NULL);
 530
 531         dbus_message_unref(message);
 532
 533         return -EINPROGRESS;
 534 }
 535
 536 static void add_connection(const char *path, DBusMessageIter *properties,
 537                         void *user_data)
 538 {
 539         struct connection_data *data;
 540         int err;
 541         char *ident = get_ident(path);
 542         connman_bool_t found = FALSE;
 543
 544         data = g_hash_table_lookup(vpn_connections, ident);
 545         if (data != NULL) {
 546                 /*
 547                  * We might have a dummy connection struct here that
 548                  * was created by configuration_create_reply() so in
 549                  * that case just continue.
 550                  */
 551                 if (data->connect_pending == FALSE)
 552                         return;
 553
 554                 found = TRUE;
 555         } else {
 556                 data = create_connection_data(path);
 557                 if (data == NULL)
 558                         return;
 559         }
 560
 561         DBG("data %p path %s", data, path);
 562
 563         while (dbus_message_iter_get_arg_type(properties) ==
 564                         DBUS_TYPE_DICT_ENTRY) {
 565                 DBusMessageIter entry, value;
 566                 const char *key;
 567                 char *str;
 568
 569                 dbus_message_iter_recurse(properties, &entry);
 570                 dbus_message_iter_get_basic(&entry, &key);
 571
 572                 dbus_message_iter_next(&entry);
 573                 dbus_message_iter_recurse(&entry, &value);
 574
 575                 if (g_str_equal(key, "State") == TRUE) {
 576                         dbus_message_iter_get_basic(&value, &str);
 577                         DBG("state %s -> %s", data->state, str);
 578                         data->state = g_strdup(str);
 579                 } else if (g_str_equal(key, "IPv4") == TRUE) {
 580                         extract_ip(&value, AF_INET, data);
 581                 } else if (g_str_equal(key, "IPv6") == TRUE) {
 582                         extract_ip(&value, AF_INET6, data);
 583                 } else if (g_str_equal(key, "Name") == TRUE) {
 584                         dbus_message_iter_get_basic(&value, &str);
 585                         data->name = g_strdup(str);
 586                 } else if (g_str_equal(key, "Type") == TRUE) {
 587                         dbus_message_iter_get_basic(&value, &str);
 588                         data->type = g_strdup(str);
 589                 } else if (g_str_equal(key, "Host") == TRUE) {
 590                         dbus_message_iter_get_basic(&value, &str);
 591                         data->host = g_strdup(str);
 592                 } else if (g_str_equal(key, "Domain") == TRUE) {
 593                         dbus_message_iter_get_basic(&value, &str);
 594                         data->domain = g_strdup(str);
 595                 } else if (g_str_equal(key, "Nameservers") == TRUE) {
 596                         extract_nameservers(&value, data);
 597                 } else if (g_str_equal(key, "Index") == TRUE) {
 598                         dbus_message_iter_get_basic(&value, &data->index);
 599                 } else {
 600                         if (dbus_message_iter_get_arg_type(&value) ==
 601                                                         DBUS_TYPE_STRING) {
 602                                 dbus_message_iter_get_basic(&value, &str);
 603                                 g_hash_table_replace(data->setting_strings,
 604                                                 g_strdup(key), g_strdup(str));
 605                         } else {
 606                                 DBG("unknown key %s", key);
 607                         }
 608                 }
 609
 610                 dbus_message_iter_next(properties);
 611         }
 612
 613         if (found == FALSE)
 614                 g_hash_table_insert(vpn_connections, g_strdup(data->ident),
 615                                                                         data);
 616
 617         err = create_provider(data, user_data);
 618         if (err < 0)
 619                 goto out;
 620
 621         resolv_host_addr(data);
 622
 623         if (data->connect_pending == TRUE)
 624                 connect_provider(data, data->cb_data);
 625
 626         return;
 627
 628 out:
 629         DBG("removing %s", data->ident);
 630         g_hash_table_remove(vpn_connections, data->ident);
 631 }
 632
 633 static void get_connections_reply(DBusPendingCall *call, void *user_data)
 634 {
 635         DBusMessage *reply;
 636         DBusError error;
 637         DBusMessageIter array, dict;
 638         const char *signature = DBUS_TYPE_ARRAY_AS_STRING
 639                 DBUS_STRUCT_BEGIN_CHAR_AS_STRING
 640                 DBUS_TYPE_OBJECT_PATH_AS_STRING
 641                 DBUS_TYPE_ARRAY_AS_STRING
 642                 DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING
 643                 DBUS_TYPE_STRING_AS_STRING
 644                 DBUS_TYPE_VARIANT_AS_STRING
 645                 DBUS_DICT_ENTRY_END_CHAR_AS_STRING
 646                 DBUS_STRUCT_END_CHAR_AS_STRING;
 647
 648         if (dbus_pending_call_get_completed(call) == FALSE)
 649                 return;
 650
 651         DBG("");
 652
 653         reply = dbus_pending_call_steal_reply(call);
 654
 655         dbus_error_init(&error);
 656
 657         if (dbus_set_error_from_message(&error, reply) == TRUE) {
 658                 connman_error("%s", error.message);
 659                 dbus_error_free(&error);
 660                 goto done;
 661         }
 662
 663         if (dbus_message_has_signature(reply, signature) == FALSE) {
 664                 connman_error("vpnd signature \"%s\" does not match "
 665                                                         "expected \"%s\"",
 666                         dbus_message_get_signature(reply), signature);
 667                 goto done;
 668         }
 669
 670         if (dbus_message_iter_init(reply, &array) == FALSE)
 671                 goto done;
 672
 673         dbus_message_iter_recurse(&array, &dict);
 674
 675         while (dbus_message_iter_get_arg_type(&dict) == DBUS_TYPE_STRUCT) {
 676                 DBusMessageIter value, properties;
 677                 const char *path;
 678
 679                 dbus_message_iter_recurse(&dict, &value);
 680                 dbus_message_iter_get_basic(&value, &path);
 681
 682                 dbus_message_iter_next(&value);
 683                 dbus_message_iter_recurse(&value, &properties);
 684
 685                 add_connection(path, &properties, user_data);
 686
 687                 dbus_message_iter_next(&dict);
 688         }
 689
 690 done:
 691         dbus_message_unref(reply);
 692
 693         dbus_pending_call_unref(call);
 694 }
 695
 696 static int get_connections(void *user_data)
 697 {
 698         DBusPendingCall *call;
 699         DBusMessage *message;
 700
 701         DBG("");
 702
 703         message = dbus_message_new_method_call(VPN_SERVICE, "/",
 704                                         VPN_MANAGER_INTERFACE,
 705                                         GET_CONNECTIONS);
 706         if (message == NULL)
 707                 return -ENOMEM;
 708
 709         if (dbus_connection_send_with_reply(connection, message,
 710                                         &call, DBUS_TIMEOUT) == FALSE) {
 711                 connman_error("Unable to call %s.%s()", VPN_MANAGER_INTERFACE,
 712                                                         GET_CONNECTIONS);
 713                 dbus_message_unref(message);
 714                 return -EINVAL;
 715         }
 716
 717         if (call == NULL) {
 718                 dbus_message_unref(message);
 719                 return -EINVAL;
 720         }
 721
 722         dbus_pending_call_set_notify(call, get_connections_reply,
 723                                                         user_data, NULL);
 724
 725         dbus_message_unref(message);
 726
 727         return -EINPROGRESS;
 728 }
 729
 730 static int provider_probe(struct connman_provider *provider)
 731 {
 732         return 0;
 733 }
 734
 735 static void remove_connection_reply(DBusPendingCall *call, void *user_data)
 736 {
 737         DBusMessage *reply;
 738         DBusError error;
 739
 740         if (dbus_pending_call_get_completed(call) == FALSE)
 741                 return;
 742
 743         DBG("");
 744
 745         reply = dbus_pending_call_steal_reply(call);
 746
 747         dbus_error_init(&error);
 748
 749         if (dbus_set_error_from_message(&error, reply) == TRUE) {
 750                 /*
 751                  * If the returned error is NotFound, it means that we
 752                  * have actually removed the provider in vpnd already.
 753                  */
 754                 if (dbus_error_has_name(&error, CONNMAN_ERROR_INTERFACE
 755                                                 ".NotFound") == FALSE)
 756                         connman_error("%s", error.message);
 757
 758                 dbus_error_free(&error);
 759         }
 760
 761         dbus_message_unref(reply);
 762
 763         dbus_pending_call_unref(call);
 764 }
 765
 766 static int provider_remove(struct connman_provider *provider)
 767 {
 768         DBusPendingCall *call;
 769         DBusMessage *message;
 770         struct connection_data *data;
 771
 772         data = connman_provider_get_data(provider);
 773
 774         DBG("provider %p data %p", provider, data);
 775
 776         /*
 777          * When provider.c:provider_remove() calls this function,
 778          * it will remove the provider itself after the call.
 779          * This means that we cannot use the provider pointer later
 780          * as it is no longer valid.
 781          */
 782         data->provider = NULL;
 783
 784         message = dbus_message_new_method_call(VPN_SERVICE, "/",
 785                                         VPN_MANAGER_INTERFACE,
 786                                         VPN_REMOVE);
 787         if (message == NULL)
 788                 return -ENOMEM;
 789
 790         dbus_message_append_args(message, DBUS_TYPE_OBJECT_PATH, &data->path,
 791                                 NULL);
 792
 793         if (dbus_connection_send_with_reply(connection, message,
 794                                         &call, DBUS_TIMEOUT) == FALSE) {
 795                 connman_error("Unable to call %s.%s()", VPN_MANAGER_INTERFACE,
 796                                                         VPN_REMOVE);
 797                 dbus_message_unref(message);
 798                 return -EINVAL;
 799         }
 800
 801         if (call == NULL) {
 802                 dbus_message_unref(message);
 803                 return -EINVAL;
 804         }
 805
 806         dbus_pending_call_set_notify(call, remove_connection_reply,
 807                                                         NULL, NULL);
 808
 809         dbus_message_unref(message);
 810
 811         return 0;
 812 }
 813
 814 static int provider_connect(struct connman_provider *provider)
 815 {
 816         struct connection_data *data;
 817
 818         data = connman_provider_get_data(provider);
 819         if (data == NULL)
 820                 return -EINVAL;
 821
 822         return connect_provider(data, NULL);
 823 }
 824
 825 static void disconnect_reply(DBusPendingCall *call, void *user_data)
 826 {
 827         DBusMessage *reply;
 828         DBusError error;
 829
 830         if (dbus_pending_call_get_completed(call) == FALSE)
 831                 return;
 832
 833         DBG("user %p", user_data);
 834
 835         reply = dbus_pending_call_steal_reply(call);
 836
 837         dbus_error_init(&error);
 838
 839         if (dbus_set_error_from_message(&error, reply) == TRUE) {
 840                 connman_error("%s", error.message);
 841                 dbus_error_free(&error);
 842                 goto done;
 843         }
 844
 845 done:
 846         dbus_message_unref(reply);
 847
 848         dbus_pending_call_unref(call);
 849 }
 850
 851 static int disconnect_provider(struct connection_data *data)
 852 {
 853         DBusPendingCall *call;
 854         DBusMessage *message;
 855
 856         DBG("data %p path %s", data, data->path);
 857
 858         message = dbus_message_new_method_call(VPN_SERVICE, data->path,
 859                                         VPN_CONNECTION_INTERFACE,
 860                                         VPN_DISCONNECT);
 861         if (message == NULL)
 862                 return -ENOMEM;
 863
 864         if (dbus_connection_send_with_reply(connection, message,
 865                                         &call, DBUS_TIMEOUT) == FALSE) {
 866                 connman_error("Unable to call %s.%s()",
 867                         VPN_CONNECTION_INTERFACE, VPN_DISCONNECT);
 868                 dbus_message_unref(message);
 869                 return -EINVAL;
 870         }
 871
 872         if (call == NULL) {
 873                 dbus_message_unref(message);
 874                 return -EINVAL;
 875         }
 876
 877         dbus_pending_call_set_notify(call, disconnect_reply, NULL, NULL);
 878
 879         dbus_message_unref(message);
 880
 881         connman_provider_set_state(data->provider,
 882                                         CONNMAN_PROVIDER_STATE_DISCONNECT);
 883         /*
 884          * We return 0 here instead of -EINPROGRESS because
 885          * __connman_service_disconnect() needs to return something
 886          * to gdbus so that gdbus will not call Disconnect() more
 887          * than once. This way we do not need to pass the dbus reply
 888          * message around the code.
 889          */
 890         return 0;
 891 }
 892
 893 static int provider_disconnect(struct connman_provider *provider)
 894 {
 895         struct connection_data *data;
 896
 897         DBG("provider %p", provider);
 898
 899         data = connman_provider_get_data(provider);
 900         if (data == NULL)
 901                 return -EINVAL;
 902
 903         if (g_str_equal(data->state, "ready") == TRUE ||
 904                         g_str_equal(data->state, "configuration") == TRUE)
 905                 return disconnect_provider(data);
 906
 907         return 0;
 908 }
 909
 910 static void configuration_create_reply(DBusPendingCall *call, void *user_data)
 911 {
 912         DBusMessage *reply;
 913         DBusError error;
 914         DBusMessageIter iter;
 915         const char *signature = DBUS_TYPE_OBJECT_PATH_AS_STRING;
 916         const char *path;
 917         char *ident;
 918         struct connection_data *data;
 919         struct config_create_data *cb_data = user_data;
 920
 921         if (dbus_pending_call_get_completed(call) == FALSE)
 922                 return;
 923
 924         DBG("user %p", cb_data);
 925
 926         reply = dbus_pending_call_steal_reply(call);
 927
 928         dbus_error_init(&error);
 929
 930         if (dbus_set_error_from_message(&error, reply) == TRUE) {
 931                 connman_error("dbus error: %s", error.message);
 932                 dbus_error_free(&error);
 933                 goto done;
 934         }
 935
 936         if (dbus_message_has_signature(reply, signature) == FALSE) {
 937                 connman_error("vpn configuration signature \"%s\" does not "
 938                                                 "match expected \"%s\"",
 939                         dbus_message_get_signature(reply), signature);
 940                 goto done;
 941         }
 942
 943         if (dbus_message_iter_init(reply, &iter) == FALSE)
 944                 goto done;
 945
 946         dbus_message_iter_get_basic(&iter, &path);
 947
 948         /*
 949          * Then try to connect the VPN as expected by ConnectProvider API
 950          */
 951         ident = get_ident(path);
 952
 953         data = g_hash_table_lookup(vpn_connections, ident);
 954         if (data == NULL) {
 955                 /*
 956                  * Someone removed the data. We cannot really continue.
 957                  */
 958                 DBG("Pending data not found for %s, cannot continue!", ident);
 959         } else {
 960                 data->call = NULL;
 961                 data->connect_pending = TRUE;
 962
 963                 if (data->cb_data == NULL)
 964                         data->cb_data = cb_data;
 965                 else
 966                         DBG("Connection callback data already in use!");
 967
 968                 /*
 969                  * Connection is created in add_connections() after
 970                  * we have received the ConnectionAdded signal.
 971                  */
 972
 973                 DBG("cb %p msg %p", data->cb_data,
 974                         data->cb_data ? data->cb_data->message : NULL);
 975         }
 976
 977 done:
 978         dbus_message_unref(reply);
 979
 980         dbus_pending_call_unref(call);
 981 }
 982
 983 static void set_dbus_ident(char *ident)
 984 {
 985         int i, len = strlen(ident);
 986
 987         for (i = 0; i < len; i++) {
 988                 if (ident[i] >= '0' && ident[i] <= '9')
 989                         continue;
 990                 if (ident[i] >= 'a' && ident[i] <= 'z')
 991                         continue;
 992                 if (ident[i] >= 'A' && ident[i] <= 'Z')
 993                         continue;
 994                 ident[i] = '_';
 995         }
 996 }
 997
 998 static struct vpn_route *parse_user_route(const char *user_route)
 999 {
1000         char *network, *netmask;
1001         struct vpn_route *route = NULL;
1002         int family = PF_UNSPEC;
1003         char **elems = g_strsplit(user_route, "/", 0);
1004
1005         if (elems == NULL)
1006                 return NULL;
1007
1008         network = elems[0];
1009         if (network == NULL || *network == '\0') {
1010                 DBG("no network/netmask set");
1011                 goto out;
1012         }
1013
1014         netmask = elems[1];
1015         if (netmask != NULL && *netmask == '\0') {
1016                 DBG("no netmask set");
1017                 goto out;
1018         }
1019
1020         if (g_strrstr(network, ":") != NULL)
1021                 family = AF_INET6;
1022         else if (g_strrstr(network, ".") != NULL) {
1023                 family = AF_INET;
1024
1025                 if (g_strrstr(netmask, ".") == NULL) {
1026                         /* We have netmask length */
1027                         in_addr_t addr;
1028                         struct in_addr netmask_in;
1029                         unsigned char prefix_len = 32;
1030
1031                         if (netmask != NULL) {
1032                                 char *ptr;
1033                                 long int value = strtol(netmask, &ptr, 10);
1034                                 if (ptr != netmask && *ptr == '\0' &&
1035                                                                 value <= 32)
1036                                         prefix_len = value;
1037                         }
1038
1039                         addr = 0xffffffff << (32 - prefix_len);
1040                         netmask_in.s_addr = htonl(addr);
1041                         netmask = inet_ntoa(netmask_in);
1042
1043                         DBG("network %s netmask %s", network, netmask);
1044                 }
1045         }
1046
1047         route = g_try_new(struct vpn_route, 1);
1048         if (route == NULL)
1049                 goto out;
1050
1051         route->network = g_strdup(network);
1052         route->netmask = g_strdup(netmask);
1053         route->gateway = NULL;
1054         route->family = family;
1055
1056 out:
1057         g_strfreev(elems);
1058         return route;
1059 }
1060
1061 static GSList *get_user_networks(DBusMessageIter *array)
1062 {
1063         DBusMessageIter entry;
1064         GSList *list = NULL;
1065
1066         dbus_message_iter_recurse(array, &entry);
1067
1068         while (dbus_message_iter_get_arg_type(&entry) == DBUS_TYPE_STRING) {
1069                 const char *val;
1070                 struct vpn_route *route;
1071
1072                 dbus_message_iter_get_basic(&entry, &val);
1073
1074                 route = parse_user_route(val);
1075                 if (route != NULL)
1076                         list = g_slist_prepend(list, route);
1077
1078                 dbus_message_iter_next(&entry);
1079         }
1080
1081         return list;
1082 }
1083
1084 static void append_route(DBusMessageIter *iter, void *user_data)
1085 {
1086         struct vpn_route *route = user_data;
1087         DBusMessageIter item;
1088         int family = 0;
1089
1090         connman_dbus_dict_open(iter, &item);
1091
1092         if (route == NULL)
1093                 goto empty_dict;
1094
1095         if (route->family == AF_INET)
1096                 family = 4;
1097         else if (route->family == AF_INET6)
1098                 family = 6;
1099
1100         if (family != 0)
1101                 connman_dbus_dict_append_basic(&item, "ProtocolFamily",
1102                                         DBUS_TYPE_INT32, &family);
1103
1104         if (route->network != NULL)
1105                 connman_dbus_dict_append_basic(&item, "Network",
1106                                         DBUS_TYPE_STRING, &route->network);
1107
1108         if (route->netmask != NULL)
1109                 connman_dbus_dict_append_basic(&item, "Netmask",
1110                                         DBUS_TYPE_STRING, &route->netmask);
1111
1112         if (route->gateway != NULL)
1113                 connman_dbus_dict_append_basic(&item, "Gateway",
1114                                         DBUS_TYPE_STRING, &route->gateway);
1115
1116 empty_dict:
1117         connman_dbus_dict_close(iter, &item);
1118 }
1119
1120 static void append_routes(DBusMessageIter *iter, void *user_data)
1121 {
1122         GSList *list, *routes = user_data;
1123
1124         DBG("routes %p", routes);
1125
1126         for (list = routes; list != NULL; list = g_slist_next(list)) {
1127                 DBusMessageIter dict;
1128                 struct vpn_route *route = list->data;
1129
1130                 dbus_message_iter_open_container(iter, DBUS_TYPE_STRUCT, NULL,
1131                                                 &dict);
1132                 append_route(&dict, route);
1133                 dbus_message_iter_close_container(iter, &dict);
1134         }
1135 }
1136
1137 static int create_configuration(DBusMessage *msg, connection_ready_cb callback)
1138 {
1139         DBusMessage *new_msg = NULL;
1140         DBusPendingCall *call;
1141         DBusMessageIter iter, array, new_iter, new_dict;
1142         const char *type = NULL, *name = NULL;
1143         const char *host = NULL, *domain = NULL;
1144         char *ident, *me = NULL;
1145         int err = 0;
1146         dbus_bool_t result;
1147         struct connection_data *data;
1148         struct config_create_data *user_data = NULL;
1149         GSList *networks = NULL;
1150
1151         /*
1152          * We copy the old message data into new message. We cannot
1153          * just use the old message as is because the user route
1154          * information is not in the same format in vpnd.
1155          */
1156         new_msg = dbus_message_new(DBUS_MESSAGE_TYPE_METHOD_CALL);
1157         dbus_message_iter_init_append(new_msg, &new_iter);
1158         connman_dbus_dict_open(&new_iter, &new_dict);
1159
1160         dbus_message_iter_init(msg, &iter);
1161         dbus_message_iter_recurse(&iter, &array);
1162
1163         while (dbus_message_iter_get_arg_type(&array) == DBUS_TYPE_DICT_ENTRY) {
1164                 DBusMessageIter entry, value;
1165                 void *item_value;
1166                 const char *key;
1167                 int value_type;
1168
1169                 dbus_message_iter_recurse(&array, &entry);
1170                 dbus_message_iter_get_basic(&entry, &key);
1171
1172                 dbus_message_iter_next(&entry);
1173                 dbus_message_iter_recurse(&entry, &value);
1174
1175                 value_type = dbus_message_iter_get_arg_type(&value);
1176                 item_value = NULL;
1177
1178                 switch (value_type) {
1179                 case DBUS_TYPE_STRING:
1180                         dbus_message_iter_get_basic(&value, &item_value);
1181
1182                         if (g_str_equal(key, "Type") == TRUE) {
1183                                 type = (const char *)item_value;
1184                         } else if (g_str_equal(key, "Name") == TRUE) {
1185                                 name = (const char *)item_value;
1186                         } else if (g_str_equal(key, "Host") == TRUE) {
1187                                 host = (const char *)item_value;
1188                         } else if (g_str_equal(key, "VPN.Domain") == TRUE) {
1189                                 domain = (const char *)item_value;
1190                         }
1191
1192                         DBG("%s %s", key, (char *)item_value);
1193
1194                         if (item_value != NULL)
1195                                 connman_dbus_dict_append_basic(&new_dict, key,
1196                                                 value_type, &item_value);
1197                         break;
1198                 case DBUS_TYPE_ARRAY:
1199                         if (g_str_equal(key, "Networks") == TRUE) {
1200                                 networks = get_user_networks(&value);
1201                                 connman_dbus_dict_append_array(&new_dict,
1202                                                         "UserRoutes",
1203                                                         DBUS_TYPE_DICT_ENTRY,
1204                                                         append_routes,
1205                                                         networks);
1206                         }
1207                         break;
1208                 }
1209
1210                 dbus_message_iter_next(&array);
1211         }
1212
1213         connman_dbus_dict_close(&new_iter, &new_dict);
1214
1215         DBG("VPN type %s name %s host %s domain %s networks %p",
1216                 type, name, host, domain, networks);
1217
1218         if (host == NULL || domain == NULL) {
1219                 err = -EINVAL;
1220                 goto done;
1221         }
1222
1223         if (type == NULL || name == NULL) {
1224                 err = -EOPNOTSUPP;
1225                 goto done;
1226         }
1227
1228         ident = g_strdup_printf("%s_%s", host, domain);
1229         set_dbus_ident(ident);
1230
1231         DBG("ident %s", ident);
1232
1233         data = g_hash_table_lookup(vpn_connections, ident);
1234         if (data != NULL) {
1235                 if (data->call != NULL) {
1236                         connman_error("Dbus call already pending");
1237                         err = -EINPROGRESS;
1238                         goto done;
1239                 }
1240         } else {
1241                 char *path = g_strdup_printf("%s/connection/%s", VPN_PATH,
1242                                                                 ident);
1243                 data = create_connection_data(path);
1244                 g_free(path);
1245
1246                 if (data == NULL) {
1247                         err = -ENOMEM;
1248                         goto done;
1249                 }
1250
1251                 g_hash_table_insert(vpn_connections, g_strdup(ident), data);
1252         }
1253
1254         /*
1255          * User called net.connman.Manager.ConnectProvider if we are here.
1256          * So use the data from original message in the new msg.
1257          */
1258         me = g_strdup(dbus_message_get_destination(msg));
1259
1260         dbus_message_set_interface(new_msg, VPN_MANAGER_INTERFACE);
1261         dbus_message_set_path(new_msg, "/");
1262         dbus_message_set_destination(new_msg, VPN_SERVICE);
1263         dbus_message_set_sender(new_msg, me);
1264         dbus_message_set_member(new_msg, "Create");
1265
1266         result = dbus_connection_send_with_reply(connection, new_msg,
1267                                                 &call, DBUS_TIMEOUT);
1268         if (result == FALSE || call == NULL) {
1269                 err = -EIO;
1270                 goto done;
1271         }
1272
1273         if (data->cb_data == NULL) {
1274                 user_data = g_try_new(struct config_create_data, 1);
1275                 if (user_data != NULL) {
1276                         user_data->callback = callback;
1277                         user_data->message = dbus_message_ref(msg);
1278                         user_data->path = NULL;
1279
1280                         DBG("cb %p msg %p", user_data, msg);
1281                 }
1282         } else {
1283                 DBG("Configuration callback data already pending, "
1284                         "discarding new data.");
1285         }
1286
1287         dbus_pending_call_set_notify(call, configuration_create_reply,
1288                                                         user_data, NULL);
1289         data->call = call;
1290
1291 done:
1292         if (new_msg != NULL)
1293                 dbus_message_unref(new_msg);
1294
1295         if (networks != NULL)
1296                 g_slist_free_full(networks, destroy_route);
1297
1298         g_free(me);
1299         return err;
1300 }
1301
1302 static connman_bool_t check_host(char **hosts, char *host)
1303 {
1304         int i;
1305
1306         if (hosts == NULL)
1307                 return FALSE;
1308
1309         for (i = 0; hosts[i] != NULL; i++) {
1310                 if (g_strcmp0(hosts[i], host) == 0)
1311                         return TRUE;
1312         }
1313
1314         return FALSE;
1315 }
1316
1317 static void set_route(struct connection_data *data, struct vpn_route *route)
1318 {
1319         /*
1320          * If the VPN administrator/user has given a route to
1321          * VPN server, then we must discard that because the
1322          * server cannot be contacted via VPN tunnel.
1323          */
1324         if (check_host(data->host_ip, route->network) == TRUE) {
1325                 DBG("Discarding VPN route to %s via %s at index %d",
1326                         route->network, route->gateway, data->index);
1327                 return;
1328         }
1329
1330         if (route->family == AF_INET6) {
1331                 unsigned char prefix_len = atoi(route->netmask);
1332
1333                 connman_inet_add_ipv6_network_route(data->index,
1334                                                         route->network,
1335                                                         route->gateway,
1336                                                         prefix_len);
1337         } else {
1338                 connman_inet_add_network_route(data->index, route->network,
1339                                                 route->gateway,
1340                                                 route->netmask);
1341         }
1342 }
1343
1344 static int set_routes(struct connman_provider *provider,
1345                                 enum connman_provider_route_type type)
1346 {
1347         struct connection_data *data;
1348         GHashTableIter iter;
1349         gpointer value, key;
1350
1351         DBG("provider %p", provider);
1352
1353         data = connman_provider_get_data(provider);
1354         if (data == NULL)
1355                 return -EINVAL;
1356
1357         if (type == CONNMAN_PROVIDER_ROUTE_ALL ||
1358                                         type == CONNMAN_PROVIDER_ROUTE_USER) {
1359                 g_hash_table_iter_init(&iter, data->user_routes);
1360
1361                 while (g_hash_table_iter_next(&iter, &key, &value) == TRUE)
1362                         set_route(data, value);
1363         }
1364
1365         if (type == CONNMAN_PROVIDER_ROUTE_ALL ||
1366                                 type == CONNMAN_PROVIDER_ROUTE_SERVER) {
1367                 g_hash_table_iter_init(&iter, data->server_routes);
1368
1369                 while (g_hash_table_iter_next(&iter, &key, &value) == TRUE)
1370                         set_route(data, value);
1371         }
1372
1373         return 0;
1374 }
1375
1376 static connman_bool_t check_routes(struct connman_provider *provider)
1377 {
1378         struct connection_data *data;
1379
1380         DBG("provider %p", provider);
1381
1382         data = connman_provider_get_data(provider);
1383         if (data == NULL)
1384                 return FALSE;
1385
1386         if (data->user_routes != NULL &&
1387                         g_hash_table_size(data->user_routes) > 0)
1388                 return TRUE;
1389
1390         if (data->server_routes != NULL &&
1391                         g_hash_table_size(data->server_routes) > 0)
1392                 return TRUE;
1393
1394         return FALSE;
1395 }
1396
1397 static struct connman_provider_driver provider_driver = {
1398         .name = "VPN",
1399         .type = CONNMAN_PROVIDER_TYPE_VPN,
1400         .probe = provider_probe,
1401         .remove = provider_remove,
1402         .connect = provider_connect,
1403         .disconnect = provider_disconnect,
1404         .set_property = set_string,
1405         .get_property = get_string,
1406         .create = create_configuration,
1407         .set_routes = set_routes,
1408         .check_routes = check_routes,
1409 };
1410
1411 static void destroy_provider(struct connection_data *data)
1412 {
1413         DBG("data %p", data);
1414
1415         if (g_str_equal(data->state, "ready") == TRUE ||
1416                         g_str_equal(data->state, "configuration") == TRUE)
1417                 connman_provider_disconnect(data->provider);
1418
1419         if (data->call != NULL)
1420                 dbus_pending_call_cancel(data->call);
1421
1422         connman_provider_put(data->provider);
1423
1424         data->provider = NULL;
1425 }
1426
1427 static void connection_destroy(gpointer hash_data)
1428 {
1429         struct connection_data *data = hash_data;
1430
1431         DBG("data %p", data);
1432
1433         if (data->provider != NULL)
1434                 destroy_provider(data);
1435
1436         g_free(data->path);
1437         g_free(data->ident);
1438         g_free(data->state);
1439         g_free(data->type);
1440         g_free(data->name);
1441         g_free(data->host);
1442         g_free(data->domain);
1443         g_hash_table_destroy(data->server_routes);
1444         g_hash_table_destroy(data->user_routes);
1445         g_strfreev(data->nameservers);
1446         g_hash_table_destroy(data->setting_strings);
1447         connman_ipaddress_free(data->ip);
1448
1449         cancel_host_resolv(data);
1450
1451         g_free(data);
1452 }
1453
1454 static void vpnd_created(DBusConnection *conn, void *user_data)
1455 {
1456         DBG("connection %p", conn);
1457
1458         if (starting_vpnd == TRUE) {
1459                 vpn_connections = g_hash_table_new_full(g_str_hash,
1460                                                 g_str_equal,
1461                                                 g_free, connection_destroy);
1462                 get_connections(user_data);
1463                 starting_vpnd = FALSE;
1464         }
1465 }
1466
1467 static void vpnd_removed(DBusConnection *conn, void *user_data)
1468 {
1469         DBG("connection %p", conn);
1470
1471         g_hash_table_destroy(vpn_connections);
1472         vpn_connections = NULL;
1473         starting_vpnd = TRUE;
1474 }
1475
1476 static void remove_connection(DBusConnection *conn, const char *path)
1477 {
1478         DBG("path %s", path);
1479
1480         g_hash_table_remove(vpn_connections, get_ident(path));
1481 }
1482
1483 static gboolean connection_removed(DBusConnection *conn, DBusMessage *message,
1484                                 void *user_data)
1485 {
1486         const char *path;
1487         const char *signature = DBUS_TYPE_OBJECT_PATH_AS_STRING;
1488
1489         if (dbus_message_has_signature(message, signature) == FALSE) {
1490                 connman_error("vpn removed signature \"%s\" does not match "
1491                                                         "expected \"%s\"",
1492                         dbus_message_get_signature(message), signature);
1493                 return TRUE;
1494         }
1495
1496         dbus_message_get_args(message, NULL, DBUS_TYPE_OBJECT_PATH, &path,
1497                                 DBUS_TYPE_INVALID);
1498         remove_connection(conn, path);
1499         return TRUE;
1500 }
1501
1502 static gboolean connection_added(DBusConnection *conn, DBusMessage *message,
1503                                 void *user_data)
1504 {
1505         DBusMessageIter iter, properties;
1506         const char *path;
1507         const char *signature = DBUS_TYPE_OBJECT_PATH_AS_STRING
1508                 DBUS_TYPE_ARRAY_AS_STRING
1509                 DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING
1510                 DBUS_TYPE_STRING_AS_STRING
1511                 DBUS_TYPE_VARIANT_AS_STRING
1512                 DBUS_DICT_ENTRY_END_CHAR_AS_STRING;
1513
1514         if (dbus_message_has_signature(message, signature) == FALSE) {
1515                 connman_error("vpn ConnectionAdded signature \"%s\" does not "
1516                                                 "match expected \"%s\"",
1517                         dbus_message_get_signature(message), signature);
1518                 return TRUE;
1519         }
1520
1521         DBG("");
1522
1523         if (dbus_message_iter_init(message, &iter) == FALSE)
1524                 return TRUE;
1525
1526         dbus_message_iter_get_basic(&iter, &path);
1527
1528         dbus_message_iter_next(&iter);
1529         dbus_message_iter_recurse(&iter, &properties);
1530
1531         add_connection(path, &properties, user_data);
1532
1533         return TRUE;
1534 }
1535
1536 static int save_route(GHashTable *routes, int family, const char *network,
1537                         const char *netmask, const char *gateway)
1538 {
1539         struct vpn_route *route;
1540         char *key = g_strdup_printf("%d/%s/%s", family, network, netmask);
1541
1542         DBG("family %d network %s netmask %s", family, network, netmask);
1543
1544         route = g_hash_table_lookup(routes, key);
1545         if (route == NULL) {
1546                 route = g_try_new0(struct vpn_route, 1);
1547                 if (route == NULL) {
1548                         connman_error("out of memory");
1549                         return -ENOMEM;
1550                 }
1551
1552                 route->family = family;
1553                 route->network = g_strdup(network);
1554                 route->netmask = g_strdup(netmask);
1555                 route->gateway = g_strdup(gateway);
1556
1557                 g_hash_table_replace(routes, key, route);
1558         } else
1559                 g_free(key);
1560
1561         return 0;
1562 }
1563
1564 static int read_route_dict(GHashTable *routes, DBusMessageIter *dicts)
1565 {
1566         DBusMessageIter dict;
1567         const char *network, *netmask, *gateway;
1568         int family;
1569
1570         dbus_message_iter_recurse(dicts, &dict);
1571
1572         network = netmask = gateway = NULL;
1573         family = PF_UNSPEC;
1574
1575         while (dbus_message_iter_get_arg_type(&dict) == DBUS_TYPE_DICT_ENTRY) {
1576
1577                 DBusMessageIter entry, value;
1578                 const char *key;
1579
1580                 dbus_message_iter_recurse(&dict, &entry);
1581                 dbus_message_iter_get_basic(&entry, &key);
1582
1583                 dbus_message_iter_next(&entry);
1584                 dbus_message_iter_recurse(&entry, &value);
1585
1586                 if (g_str_equal(key, "ProtocolFamily") == TRUE) {
1587                         int pf;
1588                         dbus_message_iter_get_basic(&value, &pf);
1589                         switch (pf) {
1590                         case 4:
1591                                 family = AF_INET;
1592                                 break;
1593                         case 6:
1594                                 family = AF_INET6;
1595                                 break;
1596                         }
1597                         DBG("family %d", family);
1598                 } else if (g_str_equal(key, "Netmask") == TRUE) {
1599                         dbus_message_iter_get_basic(&value, &netmask);
1600                         DBG("netmask %s", netmask);
1601                 } else if (g_str_equal(key, "Network") == TRUE) {
1602                         dbus_message_iter_get_basic(&value, &network);
1603                         DBG("host %s", network);
1604                 } else if (g_str_equal(key, "Gateway") == TRUE) {
1605                         dbus_message_iter_get_basic(&value, &gateway);
1606                         DBG("gateway %s", gateway);
1607                 }
1608
1609                 dbus_message_iter_next(&dict);
1610         }
1611
1612         if (netmask == NULL || network == NULL || gateway == NULL) {
1613                 DBG("Value missing.");
1614                 return -EINVAL;
1615         }
1616
1617         return save_route(routes, family, network, netmask, gateway);
1618 }
1619
1620 static int routes_changed(DBusMessageIter *array, GHashTable *routes)
1621 {
1622         DBusMessageIter entry;
1623         int ret = -EINVAL;
1624
1625         if (dbus_message_iter_get_arg_type(array) != DBUS_TYPE_ARRAY) {
1626                 DBG("Expecting array, ignoring routes.");
1627                 return -EINVAL;
1628         }
1629
1630         while (dbus_message_iter_get_arg_type(array) == DBUS_TYPE_ARRAY) {
1631
1632                 dbus_message_iter_recurse(array, &entry);
1633
1634                 while (dbus_message_iter_get_arg_type(&entry) ==
1635                                                         DBUS_TYPE_STRUCT) {
1636                         DBusMessageIter dicts;
1637
1638                         dbus_message_iter_recurse(&entry, &dicts);
1639
1640                         while (dbus_message_iter_get_arg_type(&dicts) ==
1641                                                         DBUS_TYPE_ARRAY) {
1642                                 int err = read_route_dict(routes, &dicts);
1643                                 if (ret != 0)
1644                                         ret = err;
1645                                 dbus_message_iter_next(&dicts);
1646                         }
1647
1648                         dbus_message_iter_next(&entry);
1649                 }
1650
1651                 dbus_message_iter_next(array);
1652         }
1653
1654         return ret;
1655 }
1656
1657 static gboolean property_changed(DBusConnection *conn,
1658                                 DBusMessage *message,
1659                                 void *user_data)
1660 {
1661         const char *path = dbus_message_get_path(message);
1662         struct connection_data *data = NULL;
1663         DBusMessageIter iter, value;
1664         connman_bool_t ip_set = FALSE;
1665         int err;
1666         char *str;
1667         const char *key;
1668         const char *signature = DBUS_TYPE_STRING_AS_STRING
1669                 DBUS_TYPE_VARIANT_AS_STRING;
1670
1671         if (dbus_message_has_signature(message, signature) == FALSE) {
1672                 connman_error("vpn property signature \"%s\" does not match "
1673                                                         "expected \"%s\"",
1674                         dbus_message_get_signature(message), signature);
1675                 return TRUE;
1676         }
1677
1678         data = g_hash_table_lookup(vpn_connections, get_ident(path));
1679         if (data == NULL)
1680                 return TRUE;
1681
1682         if (dbus_message_iter_init(message, &iter) == FALSE)
1683                 return TRUE;
1684
1685         dbus_message_iter_get_basic(&iter, &key);
1686
1687         dbus_message_iter_next(&iter);
1688         dbus_message_iter_recurse(&iter, &value);
1689
1690         DBG("key %s", key);
1691
1692         if (g_str_equal(key, "State") == TRUE) {
1693                 dbus_message_iter_get_basic(&value, &str);
1694
1695                 DBG("%s %s -> %s", data->path, data->state, str);
1696
1697                 if (g_str_equal(data->state, str) == TRUE)
1698                         return TRUE;
1699
1700                 g_free(data->state);
1701                 data->state = g_strdup(str);
1702
1703                 set_provider_state(data);
1704         } else if (g_str_equal(key, "Index") == TRUE) {
1705                 dbus_message_iter_get_basic(&value, &data->index);
1706                 connman_provider_set_index(data->provider, data->index);
1707         } else if (g_str_equal(key, "IPv4") == TRUE) {
1708                 err = extract_ip(&value, AF_INET, data);
1709                 ip_set = TRUE;
1710         } else if (g_str_equal(key, "IPv6") == TRUE) {
1711                 err = extract_ip(&value, AF_INET6, data);
1712                 ip_set = TRUE;
1713         } else if (g_str_equal(key, "ServerRoutes") == TRUE) {
1714                 err = routes_changed(&value, data->server_routes);
1715                 /*
1716                  * Note that the vpnd will delay the route sending a bit
1717                  * (in order to collect the routes from VPN client),
1718                  * so we might have got the State changed property before
1719                  * we got ServerRoutes. This means that we must try to set
1720                  * the routes here because they would be left unset otherwise.
1721                  */
1722                 if (err == 0)
1723                         set_routes(data->provider,
1724                                                 CONNMAN_PROVIDER_ROUTE_SERVER);
1725         } else if (g_str_equal(key, "UserRoutes") == TRUE) {
1726                 err = routes_changed(&value, data->user_routes);
1727                 if (err == 0)
1728                         set_routes(data->provider,
1729                                                 CONNMAN_PROVIDER_ROUTE_USER);
1730         } else if (g_str_equal(key, "Nameservers") == TRUE) {
1731                 extract_nameservers(&value, data);
1732         }
1733
1734         if (ip_set == TRUE && err == 0) {
1735                 err = connman_provider_set_ipaddress(data->provider, data->ip);
1736                 if (err < 0)
1737                         DBG("setting provider IP address failed (%s/%d)",
1738                                 strerror(-err), -err);
1739         }
1740
1741         return TRUE;
1742 }
1743
1744 static int vpn_init(void)
1745 {
1746         int err;
1747
1748         connection = connman_dbus_get_connection();
1749         if (connection == NULL)
1750                 return -EIO;
1751
1752         watch = g_dbus_add_service_watch(connection, VPN_SERVICE,
1753                         vpnd_created, vpnd_removed, &provider_driver, NULL);
1754
1755         added_watch = g_dbus_add_signal_watch(connection, VPN_SERVICE, NULL,
1756                                         VPN_MANAGER_INTERFACE,
1757                                         CONNECTION_ADDED, connection_added,
1758                                         &provider_driver, NULL);
1759
1760         removed_watch = g_dbus_add_signal_watch(connection, VPN_SERVICE, NULL,
1761                                         VPN_MANAGER_INTERFACE,
1762                                         CONNECTION_REMOVED, connection_removed,
1763                                         NULL, NULL);
1764
1765         property_watch = g_dbus_add_signal_watch(connection, VPN_SERVICE, NULL,
1766                                         VPN_CONNECTION_INTERFACE,
1767                                         PROPERTY_CHANGED, property_changed,
1768                                         NULL, NULL);
1769
1770         if (added_watch == 0 || removed_watch == 0 || property_watch == 0) {
1771                 err = -EIO;
1772                 goto remove;
1773         }
1774
1775         err = connman_provider_driver_register(&provider_driver);
1776         if (err == 0)
1777                 vpnd_created(connection, &provider_driver);
1778
1779         return err;
1780
1781 remove:
1782         g_dbus_remove_watch(connection, watch);
1783         g_dbus_remove_watch(connection, added_watch);
1784         g_dbus_remove_watch(connection, removed_watch);
1785         g_dbus_remove_watch(connection, property_watch);
1786
1787         dbus_connection_unref(connection);
1788
1789         return err;
1790 }
1791
1792 static void vpn_exit(void)
1793 {
1794         g_dbus_remove_watch(connection, watch);
1795         g_dbus_remove_watch(connection, added_watch);
1796         g_dbus_remove_watch(connection, removed_watch);
1797         g_dbus_remove_watch(connection, property_watch);
1798
1799         connman_provider_driver_unregister(&provider_driver);
1800
1801         g_hash_table_destroy(vpn_connections);
1802
1803         dbus_connection_unref(connection);
1804 }
1805
1806 CONNMAN_PLUGIN_DEFINE(vpn, "VPN plugin", VERSION,
1807                 CONNMAN_PLUGIN_PRIORITY_DEFAULT, vpn_init, vpn_exit)