src/config.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2010  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 <stdio.h>
  27 #include <unistd.h>
  28 #include <string.h>
  29 #include <sys/vfs.h>
  30 #include <sys/inotify.h>
  31 #include <glib.h>
  32
  33 #include "connman.h"
  34
  35 struct connman_config_service {
  36         char *ident;
  37         char *name;
  38         char *type;
  39         void *ssid;
  40         unsigned int ssid_len;
  41         char *eap;
  42         char *identity;
  43         char *ca_cert_file;
  44         char *client_cert_file;
  45         char *private_key_file;
  46         char *private_key_passphrase;
  47         char *private_key_passphrase_type;
  48         char *phase2;
  49         char *passphrase;
  50 };
  51
  52 struct connman_config {
  53         char *ident;
  54         char *name;
  55         char *description;
  56         GHashTable *service_table;
  57 };
  58
  59 static GHashTable *config_table = NULL;
  60
  61 static int inotify_wd = -1;
  62
  63 static GIOChannel *inotify_channel = NULL;
  64 static uint inotify_watch = 0;
  65
  66 /* Definition of possible strings in the .config files */
  67 #define CONFIG_KEY_NAME                "Name"
  68 #define CONFIG_KEY_DESC                "Description"
  69
  70 #define SERVICE_KEY_TYPE               "Type"
  71 #define SERVICE_KEY_NAME               "Name"
  72 #define SERVICE_KEY_SSID               "SSID"
  73 #define SERVICE_KEY_EAP                "EAP"
  74 #define SERVICE_KEY_CA_CERT            "CACertFile"
  75 #define SERVICE_KEY_CL_CERT            "ClientCertFile"
  76 #define SERVICE_KEY_PRV_KEY            "PrivateKeyFile"
  77 #define SERVICE_KEY_PRV_KEY_PASS       "PrivateKeyPassphrase"
  78 #define SERVICE_KEY_PRV_KEY_PASS_TYPE  "PrivateKeyPassphraseType"
  79 #define SERVICE_KEY_IDENTITY           "Identity"
  80 #define SERVICE_KEY_PHASE2             "Phase2"
  81 #define SERVICE_KEY_PASSPHRASE         "Passphrase"
  82
  83 static const char *config_possible_keys[] = {
  84         CONFIG_KEY_NAME,
  85         CONFIG_KEY_DESC,
  86         NULL,
  87 };
  88
  89 static const char *service_possible_keys[] = {
  90         SERVICE_KEY_TYPE,
  91         SERVICE_KEY_NAME,
  92         SERVICE_KEY_SSID,
  93         SERVICE_KEY_EAP,
  94         SERVICE_KEY_CA_CERT,
  95         SERVICE_KEY_CL_CERT,
  96         SERVICE_KEY_PRV_KEY,
  97         SERVICE_KEY_PRV_KEY_PASS,
  98         SERVICE_KEY_PRV_KEY_PASS_TYPE,
  99         SERVICE_KEY_IDENTITY,
 100         SERVICE_KEY_PHASE2,
 101         SERVICE_KEY_PASSPHRASE,
 102         NULL,
 103 };
 104
 105 static void unregister_config(gpointer data)
 106 {
 107         struct connman_config *config = data;
 108
 109         connman_info("Removing configuration %s", config->ident);
 110
 111         g_hash_table_destroy(config->service_table);
 112
 113         g_free(config->description);
 114         g_free(config->name);
 115         g_free(config->ident);
 116         g_free(config);
 117 }
 118
 119 static void unregister_service(gpointer data)
 120 {
 121         struct connman_config_service *service = data;
 122
 123         connman_info("Removing service configuration %s", service->ident);
 124
 125         g_free(service->ident);
 126         g_free(service->type);
 127         g_free(service->name);
 128         g_free(service->ssid);
 129         g_free(service->eap);
 130         g_free(service->identity);
 131         g_free(service->ca_cert_file);
 132         g_free(service->client_cert_file);
 133         g_free(service->private_key_file);
 134         g_free(service->private_key_passphrase);
 135         g_free(service->private_key_passphrase_type);
 136         g_free(service->phase2);
 137         g_free(service->passphrase);
 138         g_free(service);
 139 }
 140
 141 static void check_keys(GKeyFile *keyfile, const char *group,
 142                         const char **possible_keys)
 143 {
 144         char **avail_keys;
 145         gsize nb_avail_keys, i, j;
 146
 147         avail_keys = g_key_file_get_keys(keyfile, group, &nb_avail_keys, NULL);
 148         if (avail_keys == NULL)
 149                 return;
 150
 151         /*
 152          * For each key in the configuration file,
 153          * verify it is understood by connman
 154          */
 155         for (i = 0 ; i < nb_avail_keys; i++) {
 156                 for (j = 0; possible_keys[j] ; j++)
 157                         if (g_strcmp0(avail_keys[i], possible_keys[j]) == 0)
 158                                 break;
 159
 160                 if (possible_keys[j] == NULL)
 161                         connman_warn("Unknown configuration key %s in [%s]",
 162                                         avail_keys[i], group);
 163         }
 164
 165         g_strfreev(avail_keys);
 166 }
 167
 168 static int load_service(GKeyFile *keyfile, const char *group,
 169                                                 struct connman_config *config)
 170 {
 171         struct connman_config_service *service;
 172         const char *ident;
 173         char *str, *hex_ssid;
 174
 175         /* Strip off "service_" prefix */
 176         ident = group + 8;
 177
 178         if (strlen(ident) < 1)
 179                 return -EINVAL;
 180
 181         /* Verify that provided keys are good */
 182         check_keys(keyfile, group, service_possible_keys);
 183
 184         service = g_hash_table_lookup(config->service_table, ident);
 185         if (service == NULL) {
 186                 service = g_try_new0(struct connman_config_service, 1);
 187                 if (service == NULL)
 188                         return -ENOMEM;
 189
 190                 service->ident = g_strdup(ident);
 191         }
 192
 193         str = g_key_file_get_string(keyfile, group, SERVICE_KEY_TYPE, NULL);
 194         if (str != NULL) {
 195                 g_free(service->type);
 196                 service->type = str;
 197         }
 198
 199         str = g_key_file_get_string(keyfile, group, SERVICE_KEY_NAME, NULL);
 200         if (str != NULL) {
 201                 g_free(service->name);
 202                 service->name = str;
 203         }
 204
 205         hex_ssid = g_key_file_get_string(keyfile, group, SERVICE_KEY_SSID,
 206                                          NULL);
 207         if (hex_ssid != NULL) {
 208                 char *ssid;
 209                 unsigned int i, j = 0, hex;
 210                 size_t hex_ssid_len = strlen(hex_ssid);
 211
 212                 ssid = g_try_malloc0(hex_ssid_len / 2);
 213                 if (ssid == NULL) {
 214                         g_free(hex_ssid);
 215                         return -ENOMEM;
 216                 }
 217
 218                 for (i = 0; i < hex_ssid_len; i += 2) {
 219                         sscanf(hex_ssid + i, "%02x", &hex);
 220                         ssid[j++] = hex;
 221                 }
 222
 223                 g_free(hex_ssid);
 224
 225                 g_free(service->ssid);
 226                 service->ssid = ssid;
 227                 service->ssid_len = hex_ssid_len / 2;
 228         } else if (service->name != NULL) {
 229                 char *ssid;
 230                 unsigned int ssid_len;
 231
 232                 ssid_len = strlen(service->name);
 233                 ssid = g_try_malloc0(ssid_len);
 234                 if (ssid == NULL)
 235                         return -ENOMEM;
 236
 237                 memcpy(ssid, service->name, ssid_len);
 238                 g_free(service->ssid);
 239                 service->ssid = ssid;
 240                 service->ssid_len = ssid_len;
 241         }
 242
 243         str = g_key_file_get_string(keyfile, group, SERVICE_KEY_EAP, NULL);
 244         if (str != NULL) {
 245                 g_free(service->eap);
 246                 service->eap = str;
 247         }
 248
 249         str = g_key_file_get_string(keyfile, group, SERVICE_KEY_CA_CERT, NULL);
 250         if (str != NULL) {
 251                 g_free(service->ca_cert_file);
 252                 service->ca_cert_file = str;
 253         }
 254
 255         str = g_key_file_get_string(keyfile, group, SERVICE_KEY_CL_CERT, NULL);
 256         if (str != NULL) {
 257                 g_free(service->client_cert_file);
 258                 service->client_cert_file = str;
 259         }
 260
 261         str = g_key_file_get_string(keyfile, group, SERVICE_KEY_PRV_KEY, NULL);
 262         if (str != NULL) {
 263                 g_free(service->private_key_file);
 264                 service->private_key_file = str;
 265         }
 266
 267         str = g_key_file_get_string(keyfile, group,
 268                                                 SERVICE_KEY_PRV_KEY_PASS, NULL);
 269         if (str != NULL) {
 270                 g_free(service->private_key_passphrase);
 271                 service->private_key_passphrase = str;
 272         }
 273
 274         str = g_key_file_get_string(keyfile, group,
 275                                         SERVICE_KEY_PRV_KEY_PASS_TYPE, NULL);
 276         if (str != NULL) {
 277                 g_free(service->private_key_passphrase_type);
 278                 service->private_key_passphrase_type = str;
 279         }
 280
 281         str = g_key_file_get_string(keyfile, group, SERVICE_KEY_IDENTITY, NULL);
 282         if (str != NULL) {
 283                 g_free(service->identity);
 284                 service->identity = str;
 285         }
 286
 287         str = g_key_file_get_string(keyfile, group, SERVICE_KEY_PHASE2, NULL);
 288         if (str != NULL) {
 289                 g_free(service->phase2);
 290                 service->phase2 = str;
 291         }
 292
 293         str = g_key_file_get_string(keyfile, group, SERVICE_KEY_PASSPHRASE,
 294                                         NULL);
 295         if (str != NULL) {
 296                 g_free(service->passphrase);
 297                 service->passphrase = str;
 298         }
 299
 300         g_hash_table_replace(config->service_table, service->ident, service);
 301
 302         connman_info("Adding service configuration %s", service->ident);
 303
 304         return 0;
 305 }
 306
 307 static int load_config(struct connman_config *config)
 308 {
 309         GKeyFile *keyfile;
 310         gsize length;
 311         char **groups;
 312         char *str;
 313         int i;
 314
 315         DBG("config %p", config);
 316
 317         keyfile = __connman_storage_open_config(config->ident);
 318         if (keyfile == NULL)
 319                 return -EIO;
 320
 321         /* Verify keys validity of the global section */
 322         check_keys(keyfile, "global", config_possible_keys);
 323
 324         str = g_key_file_get_string(keyfile, "global", CONFIG_KEY_NAME, NULL);
 325         if (str != NULL) {
 326                 g_free(config->name);
 327                 config->name = str;
 328         }
 329
 330         str = g_key_file_get_string(keyfile, "global", CONFIG_KEY_DESC, NULL);
 331         if (str != NULL) {
 332                 g_free(config->description);
 333                 config->description = str;
 334         }
 335
 336         groups = g_key_file_get_groups(keyfile, &length);
 337
 338         for (i = 0; groups[i] != NULL; i++) {
 339                 if (g_str_has_prefix(groups[i], "service_") == TRUE)
 340                         load_service(keyfile, groups[i], config);
 341         }
 342
 343         g_strfreev(groups);
 344
 345         __connman_storage_close_config(config->ident, keyfile, FALSE);
 346
 347         return 0;
 348 }
 349
 350 static struct connman_config *create_config(const char *ident)
 351 {
 352         struct connman_config *config;
 353
 354         DBG("ident %s", ident);
 355
 356         if (g_hash_table_lookup(config_table, ident) != NULL)
 357                 return NULL;
 358
 359         config = g_try_new0(struct connman_config, 1);
 360         if (config == NULL)
 361                 return NULL;
 362
 363         config->ident = g_strdup(ident);
 364
 365         config->service_table = g_hash_table_new_full(g_str_hash, g_str_equal,
 366                                                 NULL, unregister_service);
 367
 368         g_hash_table_insert(config_table, config->ident, config);
 369
 370         connman_info("Adding configuration %s", config->ident);
 371
 372         return config;
 373 }
 374
 375 static int read_configs(void)
 376 {
 377         GDir *dir;
 378
 379         DBG("");
 380
 381         dir = g_dir_open(STORAGEDIR, 0, NULL);
 382         if (dir != NULL) {
 383                 const gchar *file;
 384
 385                 while ((file = g_dir_read_name(dir)) != NULL) {
 386                         GString *str;
 387                         gchar *ident;
 388
 389                         if (g_str_has_suffix(file, ".config") == FALSE)
 390                                 continue;
 391
 392                         ident = g_strrstr(file, ".config");
 393                         if (ident == NULL)
 394                                 continue;
 395
 396                         str = g_string_new_len(file, ident - file);
 397                         if (str == NULL)
 398                                 continue;
 399
 400                         ident = g_string_free(str, FALSE);
 401
 402                         if (connman_dbus_validate_ident(ident) == TRUE) {
 403                                 struct connman_config *config;
 404
 405                                 config = create_config(ident);
 406                                 if (config != NULL)
 407                                         load_config(config);
 408                         }
 409                         g_free(ident);
 410                 }
 411
 412                 g_dir_close(dir);
 413         }
 414
 415         return 0;
 416 }
 417
 418 static gboolean inotify_data(GIOChannel *channel, GIOCondition cond,
 419                                                         gpointer user_data)
 420 {
 421         char buffer[256];
 422         char *next_event;
 423         gsize bytes_read;
 424         GIOStatus status;
 425
 426         if (cond & (G_IO_NVAL | G_IO_ERR | G_IO_HUP)) {
 427                 inotify_watch = 0;
 428                 return FALSE;
 429         }
 430
 431         status = g_io_channel_read_chars(channel, buffer,
 432                                         sizeof(buffer) -1, &bytes_read, NULL);
 433
 434         switch (status) {
 435         case G_IO_STATUS_NORMAL:
 436                 break;
 437         case G_IO_STATUS_AGAIN:
 438                 return TRUE;
 439         default:
 440                 connman_error("Reading from inotify channel failed");
 441                 inotify_watch = 0;
 442                 return FALSE;
 443         }
 444
 445         next_event = buffer;
 446
 447         while (bytes_read > 0) {
 448                 struct inotify_event *event;
 449                 gchar *ext;
 450                 gchar *ident;
 451                 gsize len;
 452
 453                 event = (struct inotify_event *) next_event;
 454                 if (event->len)
 455                         ident = next_event + sizeof(struct inotify_event);
 456                 else
 457                         ident = NULL;
 458
 459                 len = sizeof(struct inotify_event) + event->len;
 460
 461                 /* check if inotify_event block fit */
 462                 if (len > bytes_read)
 463                         break;
 464
 465                 next_event += len;
 466                 bytes_read -= len;
 467
 468                 if (ident == NULL)
 469                         continue;
 470
 471                 if (g_str_has_suffix(ident, ".config") == FALSE)
 472                         continue;
 473
 474                 ext = g_strrstr(ident, ".config");
 475                 if (ext == NULL)
 476                         continue;
 477
 478                 *ext = '\0';
 479
 480                 if (connman_dbus_validate_ident(ident) == FALSE)
 481                         continue;
 482
 483                 if (event->mask & IN_CREATE)
 484                         create_config(ident);
 485
 486                 if (event->mask & IN_MODIFY) {
 487                         struct connman_config *config;
 488
 489                         config = g_hash_table_lookup(config_table, ident);
 490                         if (config != NULL) {
 491                                 g_hash_table_remove_all(config->service_table);
 492                                 load_config(config);
 493                         }
 494                 }
 495
 496                 if (event->mask & IN_DELETE)
 497                         g_hash_table_remove(config_table, ident);
 498         }
 499
 500         return TRUE;
 501 }
 502
 503 static int create_watch(void)
 504 {
 505         int fd;
 506
 507         fd = inotify_init();
 508         if (fd < 0)
 509                 return -EIO;
 510
 511         inotify_wd = inotify_add_watch(fd, STORAGEDIR,
 512                                         IN_MODIFY | IN_CREATE | IN_DELETE);
 513         if (inotify_wd < 0) {
 514                 connman_error("Creation of STORAGEDIR  watch failed");
 515                 close(fd);
 516                 return -EIO;
 517         }
 518
 519         inotify_channel = g_io_channel_unix_new(fd);
 520         if (inotify_channel == NULL) {
 521                 connman_error("Creation of inotify channel failed");
 522                 inotify_rm_watch(fd, inotify_wd);
 523                 inotify_wd = 0;
 524
 525                 close(fd);
 526                 return -EIO;
 527         }
 528
 529         g_io_channel_set_close_on_unref(inotify_channel, TRUE);
 530         g_io_channel_set_encoding(inotify_channel, NULL, NULL);
 531         g_io_channel_set_buffered(inotify_channel, FALSE);
 532
 533         inotify_watch = g_io_add_watch(inotify_channel,
 534                                 G_IO_IN | G_IO_HUP | G_IO_NVAL | G_IO_ERR,
 535                                 inotify_data, NULL);
 536
 537         return 0;
 538 }
 539
 540 static void remove_watch(void)
 541 {
 542         int fd;
 543
 544         if (inotify_channel == NULL)
 545                 return;
 546
 547         if (inotify_watch > 0) {
 548                 g_source_remove(inotify_watch);
 549                 inotify_watch = 0;
 550         }
 551
 552         fd = g_io_channel_unix_get_fd(inotify_channel);
 553
 554         if (inotify_wd >= 0) {
 555                 inotify_rm_watch(fd, inotify_wd);
 556                 inotify_wd = 0;
 557         }
 558
 559         g_io_channel_unref(inotify_channel);
 560 }
 561
 562 int __connman_config_init(void)
 563 {
 564         DBG("");
 565
 566         config_table = g_hash_table_new_full(g_str_hash, g_str_equal,
 567                                                 NULL, unregister_config);
 568
 569         create_watch();
 570
 571         return read_configs();
 572 }
 573
 574 void __connman_config_cleanup(void)
 575 {
 576         DBG("");
 577
 578         remove_watch();
 579
 580         g_hash_table_destroy(config_table);
 581         config_table = NULL;
 582 }
 583
 584 static char *config_pem_fsid(const char *pem_file)
 585 {
 586         struct statfs buf;
 587         unsigned *fsid = (unsigned *) &buf.f_fsid;
 588         unsigned long long fsid64;
 589
 590         if (pem_file == NULL)
 591                 return NULL;
 592
 593         if (statfs(pem_file, &buf) < 0) {
 594                 connman_error("statfs error %s for %s",
 595                                                 strerror(errno), pem_file);
 596                 return NULL;
 597         }
 598
 599         fsid64 = ((unsigned long long) fsid[0] << 32) | fsid[1];
 600
 601         return g_strdup_printf("%llx", fsid64);
 602 }
 603
 604 static void provision_service(gpointer key, gpointer value, gpointer user_data)
 605 {
 606         struct connman_service *service = user_data;
 607         struct connman_config_service *config = value;
 608         struct connman_network *network;
 609         const void *ssid;
 610         unsigned int ssid_len;
 611
 612         /* For now only WiFi service entries are supported */
 613         if (g_strcmp0(config->type, "wifi") != 0)
 614                 return;
 615
 616         network = __connman_service_get_network(service);
 617         if (network == NULL) {
 618                 connman_error("Service has no network set");
 619                 return;
 620         }
 621
 622         ssid = connman_network_get_blob(network, "WiFi.SSID", &ssid_len);
 623         if (ssid == NULL) {
 624                 connman_error("Network SSID not set");
 625                 return;
 626         }
 627
 628         if (config->ssid == NULL || ssid_len != config->ssid_len)
 629                 return;
 630
 631         if (memcmp(config->ssid, ssid, ssid_len) != 0)
 632                 return;
 633
 634         __connman_service_set_immutable(service, TRUE);
 635         __connman_service_set_favorite(service, TRUE);
 636
 637         if (config->eap != NULL)
 638                 __connman_service_set_string(service, "EAP", config->eap);
 639
 640         if (config->identity != NULL)
 641                 __connman_service_set_string(service, "Identity",
 642                                                         config->identity);
 643
 644         if (config->ca_cert_file != NULL)
 645                 __connman_service_set_string(service, "CACertFile",
 646                                                         config->ca_cert_file);
 647
 648         if (config->client_cert_file != NULL)
 649                 __connman_service_set_string(service, "ClientCertFile",
 650                                                 config->client_cert_file);
 651
 652         if (config->private_key_file != NULL)
 653                 __connman_service_set_string(service, "PrivateKeyFile",
 654                                                 config->private_key_file);
 655
 656         if (g_strcmp0(config->private_key_passphrase_type, "fsid") == 0 &&
 657                                         config->private_key_file != NULL) {
 658                 char *fsid;
 659
 660                 fsid = config_pem_fsid(config->private_key_file);
 661                 if (fsid == NULL)
 662                         return;
 663
 664                 g_free(config->private_key_passphrase);
 665                 config->private_key_passphrase = fsid;
 666         }
 667
 668         if (config->private_key_passphrase != NULL) {
 669                 __connman_service_set_string(service, "PrivateKeyPassphrase",
 670                                                 config->private_key_passphrase);
 671                 /*
 672                  * TODO: Support for PEAP with both identity and key passwd.
 673                  * In that case, we should check if both of them are found
 674                  * from the config file. If not, we should not set the
 675                  * service passphrase in order for the UI to request for an
 676                  * additional passphrase.
 677                  */
 678         }
 679
 680         if (config->phase2 != NULL)
 681                 __connman_service_set_string(service, "Phase2", config->phase2);
 682
 683         if (config->passphrase != NULL)
 684                 __connman_service_set_string(service, "Passphrase", config->passphrase);
 685 }
 686
 687 int __connman_config_provision_service(struct connman_service *service)
 688 {
 689         enum connman_service_type type;
 690         GHashTableIter iter;
 691         gpointer value, key;
 692
 693         DBG("service %p", service);
 694
 695         /* For now only WiFi services are supported */
 696         type = connman_service_get_type(service);
 697         if (type != CONNMAN_SERVICE_TYPE_WIFI)
 698                 return -ENOSYS;
 699
 700         g_hash_table_iter_init(&iter, config_table);
 701
 702         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
 703                 struct connman_config *config = value;
 704
 705                 g_hash_table_foreach(config->service_table,
 706                                                 provision_service, service);
 707         }
 708
 709         return 0;
 710 }