plugins/session_policy_local.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2012-2014  BMW Car IT GmbH.
   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 <string.h>
  28 #include <sys/inotify.h>
  29 #include <sys/stat.h>
  30 #include <sys/types.h>
  31 #include <pwd.h>
  32 #include <grp.h>
  33
  34 #include <glib.h>
  35
  36 #include <gdbus.h>
  37
  38 #define CONNMAN_API_SUBJECT_TO_CHANGE
  39 #include <connman/plugin.h>
  40 #include <connman/log.h>
  41 #include <connman/session.h>
  42 #include <connman/dbus.h>
  43 #include <connman/inotify.h>
  44
  45 #include "src/shared/util.h"
  46
  47 #define POLICYDIR STORAGEDIR "/session_policy_local"
  48
  49 #define MODE            (S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | \
  50                         S_IXGRP | S_IROTH | S_IXOTH)
  51
  52 static DBusConnection *connection;
  53
  54 static GHashTable *file_hash;    /* (filename, policy_file) */
  55 static GHashTable *session_hash; /* (connman_session, policy_config) */
  56
  57 /* Global lookup tables for mapping sessions to policies */
  58 static GHashTable *selinux_hash; /* (lsm context, policy_group) */
  59 static GHashTable *uid_hash;     /* (uid, policy_group) */
  60 static GHashTable *gid_hash;     /* (gid, policy_group) */
  61
  62 /*
  63  * A instance of struct policy_file is created per file in
  64  * POLICYDIR.
  65  */
  66 struct policy_file {
  67         /*
  68          * A valid file is a keyfile with one ore more groups. All
  69          * groups are keept in this list.
  70          */
  71         GSList *groups;
  72 };
  73
  74 struct policy_group {
  75         char *selinux;
  76         char *uid;
  77         char *gid;
  78
  79         /*
  80          * Each policy_group owns a config and is not shared with
  81          * sessions. Instead each session copies the valued from this
  82          * object.
  83          */
  84         struct connman_session_config *config;
  85
  86         /* All 'users' of this policy. */
  87         GSList *sessions;
  88 };
  89
  90 /* A struct policy_config object is created and owned by a session. */
  91 struct policy_config {
  92         char *selinux;
  93         char *selinux_context;
  94         char *uid;
  95         GSList *gids;
  96
  97         /* The policy config owned by the session */
  98         struct connman_session_config *config;
  99
 100         /* To which policy belongs this policy_config */
 101         struct connman_session *session;
 102         /*
 103          * Points to the policy_group when a config has been applied
 104          * from a file.
 105          */
 106         struct policy_group *group;
 107 };
 108
 109 static void copy_session_config(struct connman_session_config *dst,
 110                         struct connman_session_config *src)
 111 {
 112         g_slist_free(dst->allowed_bearers);
 113         dst->allowed_bearers = g_slist_copy(src->allowed_bearers);
 114         dst->ecall = src->ecall;
 115         dst->type = src->type;
 116         dst->roaming_policy = src->roaming_policy;
 117         dst->priority = src->priority;
 118 }
 119
 120 static void set_policy(struct policy_config *policy,
 121                         struct policy_group *group)
 122 {
 123         DBG("policy %p group %p", policy, group);
 124
 125         group->sessions = g_slist_prepend(group->sessions, policy);
 126         policy->group = group;
 127
 128         copy_session_config(policy->config, group->config);
 129 }
 130
 131 static char *parse_selinux_type(const char *context)
 132 {
 133         char *ident, **tokens;
 134
 135         /*
 136          * SELinux combines Role-Based Access Control (RBAC), Type
 137          * Enforcment (TE) and optionally Multi-Level Security (MLS).
 138          *
 139          * When SELinux is enabled all processes and files are labeled
 140          * with a contex that contains information such as user, role
 141          * type (and optionally a level). E.g.
 142          *
 143          * $ ls -Z
 144          * -rwxrwxr-x. wagi wagi unconfined_u:object_r:haifux_exec_t:s0 session_ui.py
 145          *
 146          * For identifyng application we (ab)using the type
 147          * information. In the above example the haifux_exec_t type
 148          * will be transfered to haifux_t as defined in the domain
 149          * transition and thus we are able to identify the application
 150          * as haifux_t.
 151          */
 152
 153         tokens = g_strsplit(context, ":", 0);
 154         if (g_strv_length(tokens) < 2) {
 155                 g_strfreev(tokens);
 156                 return NULL;
 157         }
 158
 159         /* Use the SELinux type as identification token. */
 160         ident = g_strdup(tokens[2]);
 161
 162         g_strfreev(tokens);
 163
 164         return ident;
 165 }
 166
 167 static void cleanup_config(gpointer user_data);
 168
 169 static void finish_create(struct policy_config *policy,
 170                                 connman_session_config_func_t cb,
 171                                 void *user_data)
 172 {
 173         struct policy_group *group = NULL;
 174         GSList *list;
 175
 176         if (policy->selinux)
 177                 group = g_hash_table_lookup(selinux_hash, policy->selinux);
 178
 179         if (group) {
 180                 set_policy(policy, group);
 181
 182                 policy->config->id_type = CONNMAN_SESSION_ID_TYPE_LSM;
 183                 policy->config->id = g_strdup(policy->selinux_context);
 184                 goto done;
 185         }
 186
 187         if (policy->uid)
 188                 group = g_hash_table_lookup(uid_hash, policy->uid);
 189
 190         if (group) {
 191                 set_policy(policy, group);
 192
 193                 policy->config->id_type = CONNMAN_SESSION_ID_TYPE_UID;
 194                 policy->config->id = g_strdup(policy->uid);
 195                 goto done;
 196         }
 197
 198         for (list = policy->gids; list; list = list->next) {
 199                 char *gid = list->data;
 200
 201                 group = g_hash_table_lookup(gid_hash, gid);
 202                 if (!group)
 203                         continue;
 204
 205                 set_policy(policy, group);
 206
 207                 policy->config->id_type = CONNMAN_SESSION_ID_TYPE_GID;
 208                 policy->config->id = g_strdup(gid);
 209                 break;
 210         }
 211 done:
 212         g_hash_table_replace(session_hash, policy->session, policy);
 213
 214         (*cb)(policy->session, policy->config, user_data, 0);
 215 }
 216
 217 static void failed_create(struct policy_config *policy,
 218                         connman_session_config_func_t cb,
 219                         void *user_data, int err)
 220 {
 221         (*cb)(policy->session, NULL, user_data, err);
 222
 223         cleanup_config(policy);
 224 }
 225
 226 static void selinux_context_reply(const unsigned char *context, void *user_data,
 227                                         int err)
 228 {
 229         struct cb_data *cbd = user_data;
 230         connman_session_config_func_t cb = cbd->cb;
 231         struct policy_config *policy = cbd->data;
 232         char *ident = NULL;
 233
 234         DBG("session %p", policy->session);
 235
 236         if (err == -EIO) {
 237                 /* No SELinux support, drop back to UID/GID only mode */
 238                 finish_create(policy, cb, cbd->user_data);
 239                 goto done;
 240         }
 241
 242         if (err < 0) {
 243                 failed_create(policy, cb, cbd->user_data, err);
 244                 goto done;
 245         }
 246
 247         DBG("SELinux context %s", context);
 248
 249         policy->selinux_context = g_strdup((const char *)context);
 250         ident = parse_selinux_type(policy->selinux_context);
 251         if (ident)
 252                 policy->selinux = g_strdup(ident);
 253
 254         finish_create(policy, cb, cbd->user_data);
 255
 256 done:
 257         g_free(cbd);
 258         g_free(ident);
 259 }
 260
 261 static void get_uid_reply(unsigned int uid, void *user_data, int err)
 262 {
 263         struct cb_data *cbd = user_data;
 264         connman_session_config_func_t cb = cbd->cb;
 265         struct policy_config *policy = cbd->data;
 266         const char *owner;
 267         struct passwd *pwd;
 268         struct group *grp;
 269         gid_t *groups = NULL;
 270         int nrgroups, i;
 271
 272         DBG("session %p uid %d", policy->session, uid);
 273
 274         if (err < 0) {
 275                 cleanup_config(policy);
 276                 goto err;
 277         }
 278
 279         pwd = getpwuid((uid_t)uid);
 280         if (!pwd) {
 281                 if (errno != 0)
 282                         err = -errno;
 283                 else
 284                         err = -EINVAL;
 285                 goto err;
 286         }
 287
 288         policy->uid = g_strdup(pwd->pw_name);
 289
 290         nrgroups = 0;
 291         getgrouplist(pwd->pw_name, pwd->pw_gid, NULL, &nrgroups);
 292         groups = g_try_new0(gid_t, nrgroups);
 293         if (!groups) {
 294                 err = -ENOMEM;
 295                 goto err;
 296         }
 297
 298         err = getgrouplist(pwd->pw_name, pwd->pw_gid, groups, &nrgroups);
 299         if (err < 0)
 300                 goto err;
 301
 302         for (i = 0; i < nrgroups; i++) {
 303                 grp = getgrgid(groups[i]);
 304                 if (!grp) {
 305                         if (errno != 0)
 306                                 err = -errno;
 307                         else
 308                                 err = -EINVAL;
 309                         goto err;
 310                 }
 311
 312                 policy->gids = g_slist_prepend(policy->gids,
 313                                         g_strdup(grp->gr_name));
 314         }
 315         g_free(groups);
 316
 317         owner = connman_session_get_owner(policy->session);
 318
 319         err = connman_dbus_get_selinux_context(connection, owner,
 320                                                 selinux_context_reply, cbd);
 321         if (err == 0) {
 322                 /*
 323                  * We are able to ask for a SELinux context. Let's defer the
 324                  * creation of the session config until we get the answer
 325                  * from D-Bus.
 326                  */
 327                 return;
 328         }
 329
 330         finish_create(policy, cb, cbd->user_data);
 331         g_free(cbd);
 332
 333         return;
 334
 335 err:
 336         failed_create(NULL, cb, cbd->user_data, err);
 337         g_free(cbd);
 338         g_free(groups);
 339 }
 340
 341 static int policy_local_create(struct connman_session *session,
 342                                 connman_session_config_func_t cb,
 343                                 void *user_data)
 344 {
 345         struct cb_data *cbd = cb_data_new(cb, user_data);
 346         struct policy_config *policy;
 347         const char *owner;
 348         int err;
 349
 350         DBG("session %p", session);
 351
 352         policy = g_new0(struct policy_config, 1);
 353         policy->config = connman_session_create_default_config();
 354         policy->session = session;
 355
 356         cbd->data = policy;
 357
 358         owner = connman_session_get_owner(session);
 359
 360         err = connman_dbus_get_connection_unix_user(connection, owner,
 361                                                 get_uid_reply, cbd);
 362         if (err < 0) {
 363                 connman_error("Could not get UID");
 364                 cleanup_config(policy);
 365                 g_free(cbd);
 366                 return err;
 367         }
 368
 369         return 0;
 370 }
 371
 372 static void policy_local_destroy(struct connman_session *session)
 373 {
 374         struct policy_data *policy;
 375
 376         DBG("session %p", session);
 377
 378         policy = g_hash_table_lookup(session_hash, session);
 379         if (!policy)
 380                 return;
 381
 382         g_hash_table_remove(session_hash, session);
 383 }
 384
 385 static struct connman_session_policy session_policy_local = {
 386         .name = "session local policy configuration",
 387         .priority = CONNMAN_SESSION_POLICY_PRIORITY_DEFAULT,
 388         .create = policy_local_create,
 389         .destroy = policy_local_destroy,
 390 };
 391
 392 static int load_keyfile(const char *pathname, GKeyFile **keyfile)
 393 {
 394         GError *error = NULL;
 395         int err;
 396
 397         *keyfile = g_key_file_new();
 398
 399         if (!g_key_file_load_from_file(*keyfile, pathname, 0, &error))
 400                 goto err;
 401
 402         return 0;
 403
 404 err:
 405         /*
 406          * The fancy G_FILE_ERROR_* codes are identical to the native
 407          * error codes.
 408          */
 409         err = -error->code;
 410
 411         DBG("Unable to load %s: %s", pathname, error->message);
 412         g_clear_error(&error);
 413
 414         g_key_file_free(*keyfile);
 415         *keyfile = NULL;
 416
 417         return err;
 418 }
 419
 420 static int load_policy(GKeyFile *keyfile, const char *groupname,
 421                         struct policy_group *group)
 422 {
 423         struct connman_session_config *config = group->config;
 424         char *str, **tokens;
 425         int i, err = 0;
 426
 427         group->selinux = g_key_file_get_string(keyfile, groupname,
 428                                                 "selinux", NULL);
 429
 430         group->gid = g_key_file_get_string(keyfile, groupname,
 431                                                 "gid", NULL);
 432
 433         group->uid = g_key_file_get_string(keyfile, groupname,
 434                                                 "uid", NULL);
 435
 436         if (!group->selinux && !group->gid && !group->uid)
 437                 return -EINVAL;
 438
 439         config->priority = g_key_file_get_boolean(keyfile, groupname,
 440                                                 "Priority", NULL);
 441
 442         str = g_key_file_get_string(keyfile, groupname, "RoamingPolicy",
 443                                 NULL);
 444         if (str) {
 445                 config->roaming_policy = connman_session_parse_roaming_policy(str);
 446                 g_free(str);
 447         }
 448
 449         str = g_key_file_get_string(keyfile, groupname, "ConnectionType",
 450                                 NULL);
 451         if (str) {
 452                 config->type = connman_session_parse_connection_type(str);
 453                 g_free(str);
 454         }
 455
 456         config->ecall = g_key_file_get_boolean(keyfile, groupname,
 457                                                 "EmergencyCall", NULL);
 458
 459         str = g_key_file_get_string(keyfile, groupname, "AllowedBearers",
 460                                 NULL);
 461         if (str) {
 462                 g_slist_free(config->allowed_bearers);
 463                 config->allowed_bearers = NULL;
 464                 tokens = g_strsplit(str, " ", 0);
 465
 466                 for (i = 0; tokens[i]; i++) {
 467                         err = connman_session_parse_bearers(tokens[i],
 468                                         &config->allowed_bearers);
 469                         if (err < 0)
 470                                 break;
 471                 }
 472
 473                 g_free(str);
 474                 g_strfreev(tokens);
 475         }
 476
 477         DBG("group %p selinux %s uid %s gid %s", group, group->selinux,
 478                 group->uid, group->gid);
 479
 480         return err;
 481 }
 482
 483 static void update_session(struct policy_config *policy)
 484 {
 485         DBG("policy %p session %p", policy, policy->session);
 486
 487         if (!policy->session)
 488                 return;
 489
 490         if (connman_session_config_update(policy->session) < 0)
 491                 connman_session_destroy(policy->session);
 492 }
 493
 494 static void set_default_config(gpointer user_data)
 495 {
 496         struct policy_config *policy = user_data;
 497
 498         connman_session_set_default_config(policy->config);
 499         policy->group = NULL;
 500         update_session(policy);
 501 }
 502
 503 static void cleanup_config(gpointer user_data)
 504 {
 505         struct policy_config *policy = user_data;
 506
 507         DBG("policy %p group %p", policy, policy->group);
 508
 509         if (policy->group)
 510                 policy->group->sessions =
 511                         g_slist_remove(policy->group->sessions, policy);
 512
 513         g_slist_free(policy->config->allowed_bearers);
 514         g_free(policy->config->id);
 515         g_free(policy->config);
 516         g_free(policy->selinux_context);
 517         g_free(policy->selinux);
 518         g_free(policy->uid);
 519         g_slist_free_full(policy->gids, g_free);
 520         g_free(policy);
 521 }
 522
 523 static void cleanup_group(gpointer user_data)
 524 {
 525         struct policy_group *group = user_data;
 526
 527         DBG("group %p", group);
 528
 529         g_slist_free_full(group->sessions, set_default_config);
 530
 531         g_slist_free(group->config->allowed_bearers);
 532         g_free(group->config->id);
 533         g_free(group->config);
 534         if (group->selinux)
 535                 g_hash_table_remove(selinux_hash, group->selinux);
 536         if (group->uid)
 537                 g_hash_table_remove(uid_hash, group->uid);
 538         if (group->gid)
 539                 g_hash_table_remove(gid_hash, group->gid);
 540         g_free(group->selinux);
 541         g_free(group->uid);
 542         g_free(group->gid);
 543         g_free(group);
 544 }
 545
 546 static void cleanup_file(gpointer user_data)
 547 {
 548         struct policy_file *file = user_data;
 549
 550         DBG("file %p", file);
 551
 552         g_slist_free_full(file->groups, cleanup_group);
 553         g_free(file);
 554 }
 555
 556 static void recheck_sessions(void)
 557 {
 558         GHashTableIter iter;
 559         gpointer value, key;
 560         struct policy_group *group = NULL;
 561         GSList *list;
 562
 563         g_hash_table_iter_init(&iter, session_hash);
 564         while (g_hash_table_iter_next(&iter, &key, &value)) {
 565                 struct policy_config *policy = value;
 566
 567                 if (policy->group)
 568                         continue;
 569
 570                 if (policy->selinux)
 571                         group = g_hash_table_lookup(selinux_hash,
 572                                                         policy->selinux);
 573                 if (group) {
 574                         policy->config->id_type = CONNMAN_SESSION_ID_TYPE_LSM;
 575                         g_free(policy->config->id);
 576                         policy->config->id = g_strdup(policy->selinux_context);
 577                         update_session(policy);
 578                         continue;
 579                 }
 580
 581                 group = g_hash_table_lookup(uid_hash, policy->uid);
 582                 if (group) {
 583                         set_policy(policy, group);
 584
 585                         policy->config->id_type = CONNMAN_SESSION_ID_TYPE_UID;
 586                         g_free(policy->config->id);
 587                         policy->config->id = g_strdup(policy->uid);
 588                         update_session(policy);
 589                         continue;
 590                 }
 591
 592                 for (list = policy->gids; list; list = list->next) {
 593                         char *gid = list->data;
 594                         group = g_hash_table_lookup(gid_hash, gid);
 595                         if (group) {
 596                                 set_policy(policy, group);
 597
 598                                 policy->config->id_type = CONNMAN_SESSION_ID_TYPE_GID;
 599                                 g_free(policy->config->id);
 600                                 policy->config->id = g_strdup(gid);
 601                                 update_session(policy);
 602                         }
 603                 }
 604         }
 605 }
 606
 607 static int load_file(const char *filename, struct policy_file *file)
 608 {
 609         GKeyFile *keyfile;
 610         struct policy_group *group;
 611         char **groupnames;
 612         char *pathname;
 613         int err = 0, i;
 614
 615         DBG("%s", filename);
 616
 617         pathname = g_strdup_printf("%s/%s", POLICYDIR, filename);
 618         err = load_keyfile(pathname, &keyfile);
 619         g_free(pathname);
 620
 621         if (err < 0)
 622                 return err;
 623
 624         groupnames = g_key_file_get_groups(keyfile, NULL);
 625
 626         for (i = 0; groupnames[i]; i++) {
 627                 group = g_new0(struct policy_group, 1);
 628                 group->config = connman_session_create_default_config();
 629
 630                 err = load_policy(keyfile, groupnames[i], group);
 631                 if (err < 0) {
 632                         g_free(group->config);
 633                         g_free(group);
 634                         break;
 635                 }
 636                 if (group->selinux)
 637                         g_hash_table_replace(selinux_hash, group->selinux, group);
 638
 639                 if (group->uid)
 640                         g_hash_table_replace(uid_hash, group->uid, group);
 641
 642                 if (group->gid)
 643                         g_hash_table_replace(gid_hash, group->gid, group);
 644
 645                 file->groups = g_slist_prepend(file->groups, group);
 646         }
 647
 648         g_strfreev(groupnames);
 649
 650         if (err < 0)
 651                 g_slist_free_full(file->groups, cleanup_group);
 652
 653         g_key_file_free(keyfile);
 654
 655         return err;
 656 }
 657
 658 static bool is_filename_valid(const char *filename)
 659 {
 660         if (!filename)
 661                 return false;
 662
 663         if (filename[0] == '.')
 664                 return false;
 665
 666         return g_str_has_suffix(filename, ".policy");
 667 }
 668
 669 static int read_policies(void)
 670 {
 671         GDir *dir;
 672         const gchar *filename;
 673         struct policy_file *file;
 674
 675         DBG("");
 676
 677         dir = g_dir_open(POLICYDIR, 0, NULL);
 678         if (!dir)
 679                 return -EINVAL;
 680
 681         while ((filename = g_dir_read_name(dir))) {
 682                 if (!is_filename_valid(filename))
 683                         continue;
 684
 685                 file = g_new0(struct policy_file, 1);
 686                 if (load_file(filename, file) < 0) {
 687                         g_free(file);
 688                         continue;
 689                 }
 690
 691                 g_hash_table_replace(file_hash, g_strdup(filename), file);
 692         }
 693
 694         g_dir_close(dir);
 695
 696         return 0;
 697 }
 698
 699
 700 static void notify_handler(struct inotify_event *event,
 701                                         const char *filename)
 702 {
 703         struct policy_file *file;
 704
 705         DBG("event %x file %s", event->mask, filename);
 706
 707         if (event->mask & IN_CREATE)
 708                 return;
 709
 710         if (!is_filename_valid(filename))
 711                 return;
 712
 713         /*
 714          * load_file() will modify the global selinux/uid/gid hash
 715          * tables. We need to remove the old entries first before
 716          * else the table points to the wrong entries.
 717          */
 718         g_hash_table_remove(file_hash, filename);
 719
 720         if (event->mask & (IN_DELETE | IN_MOVED_FROM))
 721                 return;
 722
 723         if (event->mask & (IN_MOVED_TO | IN_MODIFY)) {
 724                 connman_info("Policy update for '%s'", filename);
 725
 726                 file = g_new0(struct policy_file, 1);
 727                 if (load_file(filename, file) < 0) {
 728                         g_free(file);
 729                         return;
 730                 }
 731
 732                 g_hash_table_replace(file_hash, g_strdup(filename), file);
 733                 recheck_sessions();
 734         }
 735 }
 736
 737 static int session_policy_local_init(void)
 738 {
 739         int err;
 740
 741         DBG("");
 742
 743         /* If the dir doesn't exist, create it */
 744         if (!g_file_test(POLICYDIR, G_FILE_TEST_IS_DIR)) {
 745                 if (mkdir(POLICYDIR, MODE) < 0) {
 746                         if (errno != EEXIST)
 747                                 return -errno;
 748                 }
 749         }
 750
 751         connection = connman_dbus_get_connection();
 752         if (!connection)
 753                 return -EIO;
 754
 755         file_hash = g_hash_table_new_full(g_str_hash, g_str_equal,
 756                                         g_free, cleanup_file);
 757         session_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal,
 758                                                 NULL, cleanup_config);
 759         selinux_hash = g_hash_table_new_full(g_str_hash, g_str_equal,
 760                                         NULL, NULL);
 761         uid_hash = g_hash_table_new_full(g_str_hash, g_str_equal,
 762                                         NULL, NULL);
 763         gid_hash = g_hash_table_new_full(g_str_hash, g_str_equal,
 764                                         NULL, NULL);
 765
 766         err = connman_inotify_register(POLICYDIR, notify_handler);
 767         if (err < 0)
 768                 goto err;
 769
 770         err = connman_session_policy_register(&session_policy_local);
 771         if (err < 0)
 772                 goto err_notify;
 773
 774         read_policies();
 775
 776         return 0;
 777
 778 err_notify:
 779
 780         connman_inotify_unregister(POLICYDIR, notify_handler);
 781
 782 err:
 783         if (file_hash)
 784                 g_hash_table_destroy(file_hash);
 785
 786         if (session_hash)
 787                 g_hash_table_destroy(session_hash);
 788
 789         if (selinux_hash)
 790                 g_hash_table_destroy(selinux_hash);
 791
 792         if (uid_hash)
 793                 g_hash_table_destroy(uid_hash);
 794
 795         if (gid_hash)
 796                 g_hash_table_destroy(gid_hash);
 797
 798         connman_session_policy_unregister(&session_policy_local);
 799
 800         dbus_connection_unref(connection);
 801
 802         return err;
 803 }
 804
 805 static void session_policy_local_exit(void)
 806 {
 807         DBG("");
 808
 809         g_hash_table_destroy(file_hash);
 810         g_hash_table_destroy(session_hash);
 811         g_hash_table_destroy(selinux_hash);
 812         g_hash_table_destroy(uid_hash);
 813         g_hash_table_destroy(gid_hash);
 814
 815         connman_session_policy_unregister(&session_policy_local);
 816
 817         dbus_connection_unref(connection);
 818
 819         connman_inotify_unregister(POLICYDIR, notify_handler);
 820 }
 821
 822 CONNMAN_PLUGIN_DEFINE(session_policy_local,
 823                 "Session local file policy configuration plugin",
 824                 VERSION, CONNMAN_PLUGIN_PRIORITY_DEFAULT,
 825                 session_policy_local_init, session_policy_local_exit)