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         gboolean from_fs;
  51 };
  52
  53 struct connman_config {
  54         char *ident;
  55         char *name;
  56         char *description;
  57         GHashTable *service_table;
  58 };
  59
  60 static GHashTable *config_table = NULL;
  61
  62 static int inotify_wd = -1;
  63
  64 static GIOChannel *inotify_channel = NULL;
  65 static uint inotify_watch = 0;
  66
  67 #define NONFS_CONFIG_NAME                "internal"
  68
  69 /* Definition of possible strings in the .config files */
  70 #define CONFIG_KEY_NAME                "Name"
  71 #define CONFIG_KEY_DESC                "Description"
  72
  73 #define SERVICE_KEY_TYPE               "Type"
  74 #define SERVICE_KEY_NAME               "Name"
  75 #define SERVICE_KEY_SSID               "SSID"
  76 #define SERVICE_KEY_EAP                "EAP"
  77 #define SERVICE_KEY_CA_CERT            "CACertFile"
  78 #define SERVICE_KEY_CL_CERT            "ClientCertFile"
  79 #define SERVICE_KEY_PRV_KEY            "PrivateKeyFile"
  80 #define SERVICE_KEY_PRV_KEY_PASS       "PrivateKeyPassphrase"
  81 #define SERVICE_KEY_PRV_KEY_PASS_TYPE  "PrivateKeyPassphraseType"
  82 #define SERVICE_KEY_IDENTITY           "Identity"
  83 #define SERVICE_KEY_PHASE2             "Phase2"
  84 #define SERVICE_KEY_PASSPHRASE         "Passphrase"
  85
  86 static const char *config_possible_keys[] = {
  87         CONFIG_KEY_NAME,
  88         CONFIG_KEY_DESC,
  89         NULL,
  90 };
  91
  92 static const char *service_possible_keys[] = {
  93         SERVICE_KEY_TYPE,
  94         SERVICE_KEY_NAME,
  95         SERVICE_KEY_SSID,
  96         SERVICE_KEY_EAP,
  97         SERVICE_KEY_CA_CERT,
  98         SERVICE_KEY_CL_CERT,
  99         SERVICE_KEY_PRV_KEY,
 100         SERVICE_KEY_PRV_KEY_PASS,
 101         SERVICE_KEY_PRV_KEY_PASS_TYPE,
 102         SERVICE_KEY_IDENTITY,
 103         SERVICE_KEY_PHASE2,
 104         SERVICE_KEY_PASSPHRASE,
 105         NULL,
 106 };
 107
 108 static void unregister_config(gpointer data)
 109 {
 110         struct connman_config *config = data;
 111
 112         connman_info("Removing configuration %s", config->ident);
 113
 114         g_hash_table_destroy(config->service_table);
 115
 116         g_free(config->description);
 117         g_free(config->name);
 118         g_free(config->ident);
 119         g_free(config);
 120 }
 121
 122 static void unregister_service(gpointer data)
 123 {
 124         struct connman_config_service *service = data;
 125
 126         connman_info("Removing service configuration %s", service->ident);
 127
 128         g_free(service->ident);
 129         g_free(service->type);
 130         g_free(service->name);
 131         g_free(service->ssid);
 132         g_free(service->eap);
 133         g_free(service->identity);
 134         g_free(service->ca_cert_file);
 135         g_free(service->client_cert_file);
 136         g_free(service->private_key_file);
 137         g_free(service->private_key_passphrase);
 138         g_free(service->private_key_passphrase_type);
 139         g_free(service->phase2);
 140         g_free(service->passphrase);
 141         g_free(service);
 142 }
 143
 144 static void check_keys(GKeyFile *keyfile, const char *group,
 145                         const char **possible_keys)
 146 {
 147         char **avail_keys;
 148         gsize nb_avail_keys, i, j;
 149
 150         avail_keys = g_key_file_get_keys(keyfile, group, &nb_avail_keys, NULL);
 151         if (avail_keys == NULL)
 152                 return;
 153
 154         /*
 155          * For each key in the configuration file,
 156          * verify it is understood by connman
 157          */
 158         for (i = 0 ; i < nb_avail_keys; i++) {
 159                 for (j = 0; possible_keys[j] ; j++)
 160                         if (g_strcmp0(avail_keys[i], possible_keys[j]) == 0)
 161                                 break;
 162
 163                 if (possible_keys[j] == NULL)
 164                         connman_warn("Unknown configuration key %s in [%s]",
 165                                         avail_keys[i], group);
 166         }
 167
 168         g_strfreev(avail_keys);
 169 }
 170
 171 static int load_service(GKeyFile *keyfile, const char *group,
 172                                                 struct connman_config *config)
 173 {
 174         struct connman_config_service *service;
 175         const char *ident;
 176         char *str, *hex_ssid;
 177         gboolean service_created = FALSE;
 178
 179         /* Strip off "service_" prefix */
 180         ident = group + 8;
 181
 182         if (strlen(ident) < 1)
 183                 return -EINVAL;
 184
 185         /* Verify that provided keys are good */
 186         check_keys(keyfile, group, service_possible_keys);
 187
 188         service = g_hash_table_lookup(config->service_table, ident);
 189         if (service == NULL) {
 190                 service = g_try_new0(struct connman_config_service, 1);
 191                 if (service == NULL)
 192                         return -ENOMEM;
 193
 194                 service->ident = g_strdup(ident);
 195
 196                 service_created = TRUE;
 197         }
 198
 199         str = g_key_file_get_string(keyfile, group, SERVICE_KEY_TYPE, NULL);
 200         if (str != NULL) {
 201                 g_free(service->type);
 202                 service->type = str;
 203         }
 204
 205         str = g_key_file_get_string(keyfile, group, SERVICE_KEY_NAME, NULL);
 206         if (str != NULL) {
 207                 g_free(service->name);
 208                 service->name = str;
 209         }
 210
 211         hex_ssid = g_key_file_get_string(keyfile, group, SERVICE_KEY_SSID,
 212                                          NULL);
 213         if (hex_ssid != NULL) {
 214                 char *ssid;
 215                 unsigned int i, j = 0, hex;
 216                 size_t hex_ssid_len = strlen(hex_ssid);
 217
 218                 ssid = g_try_malloc0(hex_ssid_len / 2);
 219                 if (ssid == NULL) {
 220                         g_free(hex_ssid);
 221                         return -ENOMEM;
 222                 }
 223
 224                 for (i = 0; i < hex_ssid_len; i += 2) {
 225                         sscanf(hex_ssid + i, "%02x", &hex);
 226                         ssid[j++] = hex;
 227                 }
 228
 229                 g_free(hex_ssid);
 230
 231                 g_free(service->ssid);
 232                 service->ssid = ssid;
 233                 service->ssid_len = hex_ssid_len / 2;
 234         } else if (service->name != NULL) {
 235                 char *ssid;
 236                 unsigned int ssid_len;
 237
 238                 ssid_len = strlen(service->name);
 239                 ssid = g_try_malloc0(ssid_len);
 240                 if (ssid == NULL)
 241                         return -ENOMEM;
 242
 243                 memcpy(ssid, service->name, ssid_len);
 244                 g_free(service->ssid);
 245                 service->ssid = ssid;
 246                 service->ssid_len = ssid_len;
 247         }
 248
 249         str = g_key_file_get_string(keyfile, group, SERVICE_KEY_EAP, NULL);
 250         if (str != NULL) {
 251                 g_free(service->eap);
 252                 service->eap = str;
 253         }
 254
 255         str = g_key_file_get_string(keyfile, group, SERVICE_KEY_CA_CERT, NULL);
 256         if (str != NULL) {
 257                 g_free(service->ca_cert_file);
 258                 service->ca_cert_file = str;
 259         }
 260
 261         str = g_key_file_get_string(keyfile, group, SERVICE_KEY_CL_CERT, NULL);
 262         if (str != NULL) {
 263                 g_free(service->client_cert_file);
 264                 service->client_cert_file = str;
 265         }
 266
 267         str = g_key_file_get_string(keyfile, group, SERVICE_KEY_PRV_KEY, NULL);
 268         if (str != NULL) {
 269                 g_free(service->private_key_file);
 270                 service->private_key_file = str;
 271         }
 272
 273         str = g_key_file_get_string(keyfile, group,
 274                                                 SERVICE_KEY_PRV_KEY_PASS, NULL);
 275         if (str != NULL) {
 276                 g_free(service->private_key_passphrase);
 277                 service->private_key_passphrase = str;
 278         }
 279
 280         str = g_key_file_get_string(keyfile, group,
 281                                         SERVICE_KEY_PRV_KEY_PASS_TYPE, NULL);
 282         if (str != NULL) {
 283                 g_free(service->private_key_passphrase_type);
 284                 service->private_key_passphrase_type = str;
 285         }
 286
 287         str = g_key_file_get_string(keyfile, group, SERVICE_KEY_IDENTITY, NULL);
 288         if (str != NULL) {
 289                 g_free(service->identity);
 290                 service->identity = str;
 291         }
 292
 293         str = g_key_file_get_string(keyfile, group, SERVICE_KEY_PHASE2, NULL);
 294         if (str != NULL) {
 295                 g_free(service->phase2);
 296                 service->phase2 = str;
 297         }
 298
 299         str = g_key_file_get_string(keyfile, group, SERVICE_KEY_PASSPHRASE,
 300                                         NULL);
 301         if (str != NULL) {
 302                 g_free(service->passphrase);
 303                 service->passphrase = str;
 304         }
 305
 306         if (g_strcmp0(config->ident, NONFS_CONFIG_NAME) != 0)
 307                 service->from_fs = TRUE;
 308         else
 309                 service->from_fs = FALSE;
 310
 311         if (service_created)
 312                 g_hash_table_insert(config->service_table, service->ident,
 313                                         service);
 314
 315         connman_info("Adding service configuration %s", service->ident);
 316
 317         return 0;
 318 }
 319
 320 static struct connman_config *create_config(const char *ident);
 321
 322 int __connman_config_load_service(GKeyFile *keyfile, const char *group)
 323 {
 324         struct connman_config *config = g_hash_table_lookup(config_table,
 325                                                         NONFS_CONFIG_NAME);
 326
 327         if (config == NULL) {
 328                 config = create_config(NONFS_CONFIG_NAME);
 329                 if (config == NULL)
 330                         return -ENOMEM;
 331         }
 332
 333         return load_service(keyfile, group, config);
 334 }
 335
 336 static int load_config(struct connman_config *config)
 337 {
 338         GKeyFile *keyfile;
 339         gsize length;
 340         char **groups;
 341         char *str;
 342         int i;
 343
 344         DBG("config %p", config);
 345
 346         keyfile = __connman_storage_open_config(config->ident);
 347         if (keyfile == NULL)
 348                 return -EIO;
 349
 350         /* Verify keys validity of the global section */
 351         check_keys(keyfile, "global", config_possible_keys);
 352
 353         str = g_key_file_get_string(keyfile, "global", CONFIG_KEY_NAME, NULL);
 354         if (str != NULL) {
 355                 g_free(config->name);
 356                 config->name = str;
 357         }
 358
 359         str = g_key_file_get_string(keyfile, "global", CONFIG_KEY_DESC, NULL);
 360         if (str != NULL) {
 361                 g_free(config->description);
 362                 config->description = str;
 363         }
 364
 365         groups = g_key_file_get_groups(keyfile, &length);
 366
 367         for (i = 0; groups[i] != NULL; i++) {
 368                 if (g_str_has_prefix(groups[i], "service_") == TRUE)
 369                         load_service(keyfile, groups[i], config);
 370         }
 371
 372         g_strfreev(groups);
 373
 374         __connman_storage_close_config(config->ident, keyfile, FALSE);
 375
 376         return 0;
 377 }
 378
 379 static struct connman_config *create_config(const char *ident)
 380 {
 381         struct connman_config *config;
 382
 383         DBG("ident %s", ident);
 384
 385         if (g_hash_table_lookup(config_table, ident) != NULL)
 386                 return NULL;
 387
 388         config = g_try_new0(struct connman_config, 1);
 389         if (config == NULL)
 390                 return NULL;
 391
 392         config->ident = g_strdup(ident);
 393
 394         config->service_table = g_hash_table_new_full(g_str_hash, g_str_equal,
 395                                                 NULL, unregister_service);
 396
 397         g_hash_table_insert(config_table, config->ident, config);
 398
 399         connman_info("Adding configuration %s", config->ident);
 400
 401         return config;
 402 }
 403
 404 static int read_configs(void)
 405 {
 406         GDir *dir;
 407
 408         DBG("");
 409
 410         dir = g_dir_open(STORAGEDIR, 0, NULL);
 411         if (dir != NULL) {
 412                 const gchar *file;
 413
 414                 while ((file = g_dir_read_name(dir)) != NULL) {
 415                         GString *str;
 416                         gchar *ident;
 417
 418                         if (g_str_has_suffix(file, ".config") == FALSE)
 419                                 continue;
 420
 421                         ident = g_strrstr(file, ".config");
 422                         if (ident == NULL)
 423                                 continue;
 424
 425                         if (g_str_equal(ident, NONFS_CONFIG_NAME) == TRUE)
 426                                 continue;
 427
 428                         str = g_string_new_len(file, ident - file);
 429                         if (str == NULL)
 430                                 continue;
 431
 432                         ident = g_string_free(str, FALSE);
 433
 434                         if (connman_dbus_validate_ident(ident) == TRUE) {
 435                                 struct connman_config *config;
 436
 437                                 config = create_config(ident);
 438                                 if (config != NULL)
 439                                         load_config(config);
 440                         }
 441                         g_free(ident);
 442                 }
 443
 444                 g_dir_close(dir);
 445         }
 446
 447         return 0;
 448 }
 449
 450 static gboolean inotify_data(GIOChannel *channel, GIOCondition cond,
 451                                                         gpointer user_data)
 452 {
 453         char buffer[256];
 454         char *next_event;
 455         gsize bytes_read;
 456         GIOStatus status;
 457
 458         if (cond & (G_IO_NVAL | G_IO_ERR | G_IO_HUP)) {
 459                 inotify_watch = 0;
 460                 return FALSE;
 461         }
 462
 463         status = g_io_channel_read_chars(channel, buffer,
 464                                         sizeof(buffer) -1, &bytes_read, NULL);
 465
 466         switch (status) {
 467         case G_IO_STATUS_NORMAL:
 468                 break;
 469         case G_IO_STATUS_AGAIN:
 470                 return TRUE;
 471         default:
 472                 connman_error("Reading from inotify channel failed");
 473                 inotify_watch = 0;
 474                 return FALSE;
 475         }
 476
 477         next_event = buffer;
 478
 479         while (bytes_read > 0) {
 480                 struct inotify_event *event;
 481                 gchar *ext;
 482                 gchar *ident;
 483                 gsize len;
 484
 485                 event = (struct inotify_event *) next_event;
 486                 if (event->len)
 487                         ident = next_event + sizeof(struct inotify_event);
 488                 else
 489                         ident = NULL;
 490
 491                 len = sizeof(struct inotify_event) + event->len;
 492
 493                 /* check if inotify_event block fit */
 494                 if (len > bytes_read)
 495                         break;
 496
 497                 next_event += len;
 498                 bytes_read -= len;
 499
 500                 if (ident == NULL)
 501                         continue;
 502
 503                 if (g_str_has_suffix(ident, ".config") == FALSE)
 504                         continue;
 505
 506                 ext = g_strrstr(ident, ".config");
 507                 if (ext == NULL)
 508                         continue;
 509
 510                 *ext = '\0';
 511
 512                 if (g_str_equal(ident, NONFS_CONFIG_NAME) == TRUE)
 513                         continue;
 514
 515                 if (connman_dbus_validate_ident(ident) == FALSE)
 516                         continue;
 517
 518                 if (event->mask & IN_CREATE)
 519                         create_config(ident);
 520
 521                 if (event->mask & IN_MODIFY) {
 522                         struct connman_config *config;
 523
 524                         config = g_hash_table_lookup(config_table, ident);
 525                         if (config != NULL) {
 526                                 g_hash_table_remove_all(config->service_table);
 527                                 load_config(config);
 528                         }
 529                 }
 530
 531                 if (event->mask & IN_DELETE)
 532                         g_hash_table_remove(config_table, ident);
 533         }
 534
 535         return TRUE;
 536 }
 537
 538 static int create_watch(void)
 539 {
 540         int fd;
 541
 542         fd = inotify_init();
 543         if (fd < 0)
 544                 return -EIO;
 545
 546         inotify_wd = inotify_add_watch(fd, STORAGEDIR,
 547                                         IN_MODIFY | IN_CREATE | IN_DELETE);
 548         if (inotify_wd < 0) {
 549                 connman_error("Creation of STORAGEDIR  watch failed");
 550                 close(fd);
 551                 return -EIO;
 552         }
 553
 554         inotify_channel = g_io_channel_unix_new(fd);
 555         if (inotify_channel == NULL) {
 556                 connman_error("Creation of inotify channel failed");
 557                 inotify_rm_watch(fd, inotify_wd);
 558                 inotify_wd = 0;
 559
 560                 close(fd);
 561                 return -EIO;
 562         }
 563
 564         g_io_channel_set_close_on_unref(inotify_channel, TRUE);
 565         g_io_channel_set_encoding(inotify_channel, NULL, NULL);
 566         g_io_channel_set_buffered(inotify_channel, FALSE);
 567
 568         inotify_watch = g_io_add_watch(inotify_channel,
 569                                 G_IO_IN | G_IO_HUP | G_IO_NVAL | G_IO_ERR,
 570                                 inotify_data, NULL);
 571
 572         return 0;
 573 }
 574
 575 static void remove_watch(void)
 576 {
 577         int fd;
 578
 579         if (inotify_channel == NULL)
 580                 return;
 581
 582         if (inotify_watch > 0) {
 583                 g_source_remove(inotify_watch);
 584                 inotify_watch = 0;
 585         }
 586
 587         fd = g_io_channel_unix_get_fd(inotify_channel);
 588
 589         if (inotify_wd >= 0) {
 590                 inotify_rm_watch(fd, inotify_wd);
 591                 inotify_wd = 0;
 592         }
 593
 594         g_io_channel_unref(inotify_channel);
 595 }
 596
 597 int __connman_config_init(void)
 598 {
 599         DBG("");
 600
 601         config_table = g_hash_table_new_full(g_str_hash, g_str_equal,
 602                                                 NULL, unregister_config);
 603
 604         create_watch();
 605
 606         return read_configs();
 607 }
 608
 609 void __connman_config_cleanup(void)
 610 {
 611         DBG("");
 612
 613         remove_watch();
 614
 615         g_hash_table_destroy(config_table);
 616         config_table = NULL;
 617 }
 618
 619 static char *config_pem_fsid(const char *pem_file)
 620 {
 621         struct statfs buf;
 622         unsigned *fsid = (unsigned *) &buf.f_fsid;
 623         unsigned long long fsid64;
 624
 625         if (pem_file == NULL)
 626                 return NULL;
 627
 628         if (statfs(pem_file, &buf) < 0) {
 629                 connman_error("statfs error %s for %s",
 630                                                 strerror(errno), pem_file);
 631                 return NULL;
 632         }
 633
 634         fsid64 = ((unsigned long long) fsid[0] << 32) | fsid[1];
 635
 636         return g_strdup_printf("%llx", fsid64);
 637 }
 638
 639 static void provision_service(gpointer key, gpointer value, gpointer user_data)
 640 {
 641         struct connman_service *service = user_data;
 642         struct connman_config_service *config = value;
 643         struct connman_network *network;
 644         const void *ssid;
 645         unsigned int ssid_len;
 646
 647         /* For now only WiFi service entries are supported */
 648         if (g_strcmp0(config->type, "wifi") != 0)
 649                 return;
 650
 651         network = __connman_service_get_network(service);
 652         if (network == NULL) {
 653                 connman_error("Service has no network set");
 654                 return;
 655         }
 656
 657         ssid = connman_network_get_blob(network, "WiFi.SSID", &ssid_len);
 658         if (ssid == NULL) {
 659                 connman_error("Network SSID not set");
 660                 return;
 661         }
 662
 663         if (config->ssid == NULL || ssid_len != config->ssid_len)
 664                 return;
 665
 666         if (memcmp(config->ssid, ssid, ssid_len) != 0)
 667                 return;
 668
 669         /* do not provision immutable services with non-fs originated configs */
 670         if (config->from_fs == FALSE &&
 671                         __connman_service_get_immutable(service) == TRUE)
 672                 return;
 673
 674         /* only lock services with a config originated from the filesystem */
 675         if (config->from_fs == TRUE)
 676                 __connman_service_set_immutable(service, TRUE);
 677
 678         __connman_service_set_favorite(service, TRUE);
 679
 680         if (config->eap != NULL)
 681                 __connman_service_set_string(service, "EAP", config->eap);
 682
 683         if (config->identity != NULL)
 684                 __connman_service_set_string(service, "Identity",
 685                                                         config->identity);
 686
 687         if (config->ca_cert_file != NULL)
 688                 __connman_service_set_string(service, "CACertFile",
 689                                                         config->ca_cert_file);
 690
 691         if (config->client_cert_file != NULL)
 692                 __connman_service_set_string(service, "ClientCertFile",
 693                                                 config->client_cert_file);
 694
 695         if (config->private_key_file != NULL)
 696                 __connman_service_set_string(service, "PrivateKeyFile",
 697                                                 config->private_key_file);
 698
 699         if (g_strcmp0(config->private_key_passphrase_type, "fsid") == 0 &&
 700                                         config->private_key_file != NULL) {
 701                 char *fsid;
 702
 703                 fsid = config_pem_fsid(config->private_key_file);
 704                 if (fsid == NULL)
 705                         return;
 706
 707                 g_free(config->private_key_passphrase);
 708                 config->private_key_passphrase = fsid;
 709         }
 710
 711         if (config->private_key_passphrase != NULL) {
 712                 __connman_service_set_string(service, "PrivateKeyPassphrase",
 713                                                 config->private_key_passphrase);
 714                 /*
 715                  * TODO: Support for PEAP with both identity and key passwd.
 716                  * In that case, we should check if both of them are found
 717                  * from the config file. If not, we should not set the
 718                  * service passphrase in order for the UI to request for an
 719                  * additional passphrase.
 720                  */
 721         }
 722
 723         if (config->phase2 != NULL)
 724                 __connman_service_set_string(service, "Phase2", config->phase2);
 725
 726         if (config->passphrase != NULL)
 727                 __connman_service_set_string(service, "Passphrase", config->passphrase);
 728 }
 729
 730 int __connman_config_provision_service(struct connman_service *service)
 731 {
 732         enum connman_service_type type;
 733         GHashTableIter iter;
 734         gpointer value, key;
 735
 736         DBG("service %p", service);
 737
 738         /* For now only WiFi services are supported */
 739         type = connman_service_get_type(service);
 740         if (type != CONNMAN_SERVICE_TYPE_WIFI)
 741                 return -ENOSYS;
 742
 743         g_hash_table_iter_init(&iter, config_table);
 744
 745         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
 746                 struct connman_config *config = value;
 747
 748                 g_hash_table_foreach(config->service_table,
 749                                                 provision_service, service);
 750         }
 751
 752         return 0;
 753 }