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