camel/camel-service.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
   2 /* camel-service.c : Abstract class for an email service */
   3
   4 /*
   5  *
   6  * Author :
   7  *  Bertrand Guiheneuf <bertrand@helixcode.com>
   8  *
   9  * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of version 2 of the GNU Lesser General Public
  13  * License as published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
  23  * USA
  24  */
  25
  26 #ifdef HAVE_CONFIG_H
  27 #include <config.h>
  28 #endif
  29
  30 #include <ctype.h>
  31 #include <errno.h>
  32 #include <pthread.h>
  33 #include <stdlib.h>
  34 #include <string.h>
  35
  36 #include <glib/gi18n-lib.h>
  37
  38 #include "camel-exception.h"
  39 #include "camel-operation.h"
  40 #include "camel-private.h"
  41 #include "camel-service.h"
  42 #include "camel-session.h"
  43
  44 #define d(x)
  45 #define w(x)
  46
  47 static CamelObjectClass *camel_service_parent_class = NULL;
  48
  49 static void
  50 camel_service_finalize (CamelObject *object)
  51 {
  52         CamelService *service = CAMEL_SERVICE (object);
  53
  54         if (service->status == CAMEL_SERVICE_CONNECTED) {
  55                 CamelException ex;
  56
  57                 camel_exception_init (&ex);
  58                 CAMEL_SERVICE_GET_CLASS (service)->disconnect (service, TRUE, &ex);
  59                 if (camel_exception_is_set (&ex)) {
  60                         w(g_warning ("camel_service_finalize: silent disconnect failure: %s",
  61                                      camel_exception_get_description (&ex)));
  62                 }
  63                 camel_exception_clear (&ex);
  64         }
  65
  66         if (service->url)
  67                 camel_url_free (service->url);
  68
  69         if (service->session)
  70                 camel_object_unref (service->session);
  71
  72         g_static_rec_mutex_free (&service->priv->connect_lock);
  73         g_static_mutex_free (&service->priv->connect_op_lock);
  74
  75         g_free (service->priv);
  76 }
  77
  78 static gint
  79 service_setv (CamelObject *object,
  80               CamelException *ex,
  81               CamelArgV *args)
  82 {
  83         CamelService *service = (CamelService *) object;
  84         CamelURL *url = service->url;
  85         gboolean reconnect = FALSE;
  86         guint32 tag;
  87         gint i;
  88
  89         for (i = 0; i < args->argc; i++) {
  90                 tag = args->argv[i].tag;
  91
  92                 /* make sure this is an arg we're supposed to handle */
  93                 if ((tag & CAMEL_ARG_TAG) <= CAMEL_SERVICE_ARG_FIRST ||
  94                     (tag & CAMEL_ARG_TAG) >= CAMEL_SERVICE_ARG_FIRST + 100)
  95                         continue;
  96
  97                 if (tag == CAMEL_SERVICE_USERNAME) {
  98                         /* set the username */
  99                         if (strcmp (url->user, args->argv[i].ca_str) != 0) {
 100                                 camel_url_set_user (url, args->argv[i].ca_str);
 101                                 reconnect = TRUE;
 102                         }
 103                 } else if (tag == CAMEL_SERVICE_AUTH) {
 104                         /* set the auth mechanism */
 105                         if (strcmp (url->authmech, args->argv[i].ca_str) != 0) {
 106                                 camel_url_set_authmech (url, args->argv[i].ca_str);
 107                                 reconnect = TRUE;
 108                         }
 109                 } else if (tag == CAMEL_SERVICE_HOSTNAME) {
 110                         /* set the hostname */
 111                         if (strcmp (url->host, args->argv[i].ca_str) != 0) {
 112                                 camel_url_set_host (url, args->argv[i].ca_str);
 113                                 reconnect = TRUE;
 114                         }
 115                 } else if (tag == CAMEL_SERVICE_PORT) {
 116                         /* set the port */
 117                         if (url->port != args->argv[i].ca_int) {
 118                                 camel_url_set_port (url, args->argv[i].ca_int);
 119                                 reconnect = TRUE;
 120                         }
 121                 } else if (tag == CAMEL_SERVICE_PATH) {
 122                         /* set the path */
 123                         if (strcmp (url->path, args->argv[i].ca_str) != 0) {
 124                                 camel_url_set_path (url, args->argv[i].ca_str);
 125                                 reconnect = TRUE;
 126                         }
 127                 } else {
 128                         /* error? */
 129                         continue;
 130                 }
 131
 132                 /* let our parent know that we've handled this arg */
 133                 camel_argv_ignore (args, i);
 134         }
 135
 136         /* FIXME: what if we are in the process of connecting? */
 137         if (reconnect && service->status == CAMEL_SERVICE_CONNECTED) {
 138                 /* reconnect the service using the new URL */
 139                 if (camel_service_disconnect (service, TRUE, ex))
 140                         camel_service_connect (service, ex);
 141         }
 142
 143         /* Chain up to parent's setv() method. */
 144         return CAMEL_OBJECT_CLASS (camel_service_parent_class)->setv (object, ex, args);
 145 }
 146
 147 static gint
 148 service_getv (CamelObject *object,
 149               CamelException *ex,
 150               CamelArgGetV *args)
 151 {
 152         CamelService *service = (CamelService *) object;
 153         CamelURL *url = service->url;
 154         guint32 tag;
 155         gint i;
 156
 157         for (i = 0; i < args->argc; i++) {
 158                 tag = args->argv[i].tag;
 159
 160                 /* make sure this is an arg we're supposed to handle */
 161                 if ((tag & CAMEL_ARG_TAG) <= CAMEL_SERVICE_ARG_FIRST ||
 162                     (tag & CAMEL_ARG_TAG) >= CAMEL_SERVICE_ARG_FIRST + 100)
 163                         continue;
 164
 165                 switch (tag) {
 166                 case CAMEL_SERVICE_USERNAME:
 167                         /* get the username */
 168                         *args->argv[i].ca_str = url->user;
 169                         break;
 170                 case CAMEL_SERVICE_AUTH:
 171                         /* get the auth mechanism */
 172                         *args->argv[i].ca_str = url->authmech;
 173                         break;
 174                 case CAMEL_SERVICE_HOSTNAME:
 175                         /* get the hostname */
 176                         *args->argv[i].ca_str = url->host;
 177                         break;
 178                 case CAMEL_SERVICE_PORT:
 179                         /* get the port */
 180                         *args->argv[i].ca_int = url->port;
 181                         break;
 182                 case CAMEL_SERVICE_PATH:
 183                         /* get the path */
 184                         *args->argv[i].ca_str = url->path;
 185                         break;
 186                 default:
 187                         /* error? */
 188                         break;
 189                 }
 190         }
 191
 192         /* Chain up to parent's getv() method. */
 193         return CAMEL_OBJECT_CLASS (camel_service_parent_class)->getv (object, ex, args);
 194 }
 195
 196 static void
 197 service_construct (CamelService *service,
 198                    CamelSession *session,
 199                    CamelProvider *provider,
 200                    CamelURL *url,
 201                    CamelException *ex)
 202 {
 203         gchar *err, *url_string;
 204
 205         if (CAMEL_PROVIDER_NEEDS (provider, CAMEL_URL_PART_USER) &&
 206             (url->user == NULL || url->user[0] == '\0')) {
 207                 err = _("URL '%s' needs a username component");
 208                 goto fail;
 209         } else if (CAMEL_PROVIDER_NEEDS (provider, CAMEL_URL_PART_HOST) &&
 210                    (url->host == NULL || url->host[0] == '\0')) {
 211                 err = _("URL '%s' needs a host component");
 212                 goto fail;
 213         } else if (CAMEL_PROVIDER_NEEDS (provider, CAMEL_URL_PART_PATH) &&
 214                    (url->path == NULL || url->path[0] == '\0')) {
 215                 err = _("URL '%s' needs a path component");
 216                 goto fail;
 217         }
 218
 219         service->provider = provider;
 220         service->url = camel_url_copy(url);
 221         service->session = camel_object_ref (session);
 222
 223         service->status = CAMEL_SERVICE_DISCONNECTED;
 224
 225         return;
 226
 227 fail:
 228         url_string = camel_url_to_string(url, CAMEL_URL_HIDE_PASSWORD);
 229         camel_exception_setv (
 230                 ex, CAMEL_EXCEPTION_SERVICE_URL_INVALID,
 231                 err, url_string);
 232         g_free(url_string);
 233 }
 234
 235 static gboolean
 236 service_connect (CamelService *service,
 237                  CamelException *ex)
 238 {
 239         /* Things like the CamelMboxStore can validly
 240          * not define a connect function. */
 241          return TRUE;
 242 }
 243
 244 static gboolean
 245 service_disconnect (CamelService *service,
 246                     gboolean clean,
 247                     CamelException *ex)
 248 {
 249         /* We let people get away with not having a disconnect
 250          * function -- CamelMboxStore, for example. */
 251         return TRUE;
 252 }
 253
 254 static void
 255 service_cancel_connect (CamelService *service)
 256 {
 257         camel_operation_cancel (service->connect_op);
 258 }
 259
 260 static GList *
 261 service_query_auth_types (CamelService *service,
 262                           CamelException *ex)
 263 {
 264         return NULL;
 265 }
 266
 267 static gchar *
 268 service_get_name (CamelService *service,
 269                   gboolean brief)
 270 {
 271         g_warning (
 272                 "%s does not implement CamelServiceClass::get_name()",
 273                 camel_type_to_name (CAMEL_OBJECT_GET_TYPE (service)));
 274
 275         return g_strdup (camel_type_to_name (CAMEL_OBJECT_GET_TYPE (service)));
 276 }
 277
 278 static gchar *
 279 service_get_path (CamelService *service)
 280 {
 281         CamelProvider *prov = service->provider;
 282         CamelURL *url = service->url;
 283         GString *gpath;
 284         gchar *path;
 285
 286         /* A sort of ad-hoc default implementation that works for our
 287          * current set of services.
 288          */
 289
 290         gpath = g_string_new (service->provider->protocol);
 291         if (CAMEL_PROVIDER_ALLOWS (prov, CAMEL_URL_PART_USER)) {
 292                 if (CAMEL_PROVIDER_ALLOWS (prov, CAMEL_URL_PART_HOST)) {
 293                         g_string_append_printf (gpath, "/%s@%s",
 294                                                 url->user ? url->user : "",
 295                                                 url->host ? url->host : "");
 296
 297                         if (url->port)
 298                                 g_string_append_printf (gpath, ":%d", url->port);
 299                 } else {
 300                         g_string_append_printf (gpath, "/%s%s", url->user ? url->user : "",
 301                                                 CAMEL_PROVIDER_NEEDS (prov, CAMEL_URL_PART_USER) ? "" : "@");
 302                 }
 303         } else if (CAMEL_PROVIDER_ALLOWS (prov, CAMEL_URL_PART_HOST)) {
 304                 g_string_append_printf (gpath, "/%s%s",
 305                                         CAMEL_PROVIDER_NEEDS (prov, CAMEL_URL_PART_HOST) ? "" : "@",
 306                                         url->host ? url->host : "");
 307
 308                 if (url->port)
 309                         g_string_append_printf (gpath, ":%d", url->port);
 310         }
 311
 312         if (CAMEL_PROVIDER_NEEDS (prov, CAMEL_URL_PART_PATH))
 313                 g_string_append_printf (gpath, "%s%s", *url->path == '/' ? "" : "/", url->path);
 314
 315         path = gpath->str;
 316         g_string_free (gpath, FALSE);
 317
 318         return path;
 319 }
 320
 321 static void
 322 camel_service_class_init (CamelServiceClass *class)
 323 {
 324         CamelObjectClass *camel_object_class;
 325
 326         camel_service_parent_class = camel_type_get_global_classfuncs (CAMEL_TYPE_OBJECT);
 327
 328         camel_object_class = CAMEL_OBJECT_CLASS (class);
 329         camel_object_class->setv = service_setv;
 330         camel_object_class->getv = service_getv;
 331
 332         class->construct = service_construct;
 333         class->connect = service_connect;
 334         class->disconnect = service_disconnect;
 335         class->cancel_connect = service_cancel_connect;
 336         class->query_auth_types = service_query_auth_types;
 337         class->get_name = service_get_name;
 338         class->get_path = service_get_path;
 339 }
 340
 341 static void
 342 camel_service_init (CamelService *service)
 343 {
 344         service->priv = g_malloc0(sizeof(*service->priv));
 345
 346         g_static_rec_mutex_init (&service->priv->connect_lock);
 347         g_static_mutex_init (&service->priv->connect_op_lock);
 348 }
 349
 350 CamelType
 351 camel_service_get_type (void)
 352 {
 353         static CamelType type = CAMEL_INVALID_TYPE;
 354
 355         if (type == CAMEL_INVALID_TYPE) {
 356                 type =
 357                         camel_type_register (CAMEL_TYPE_OBJECT,
 358                                              "CamelService",
 359                                              sizeof (CamelService),
 360                                              sizeof (CamelServiceClass),
 361                                              (CamelObjectClassInitFunc) camel_service_class_init,
 362                                              NULL,
 363                                              (CamelObjectInitFunc) camel_service_init,
 364                                              camel_service_finalize );
 365         }
 366
 367         return type;
 368 }
 369
 370 /**
 371  * camel_service_construct:
 372  * @service: a #CamelService object
 373  * @session: the #CamelSession for @service
 374  * @provider: the #CamelProvider associated with @service
 375  * @url: the default URL for the service (may be %NULL)
 376  * @ex: a #CamelException
 377  *
 378  * Constructs a #CamelService initialized with the given parameters.
 379  **/
 380 void
 381 camel_service_construct (CamelService *service,
 382                          CamelSession *session,
 383                          CamelProvider *provider,
 384                          CamelURL *url,
 385                          CamelException *ex)
 386 {
 387         CamelServiceClass *class;
 388
 389         g_return_if_fail (CAMEL_IS_SERVICE (service));
 390         g_return_if_fail (CAMEL_IS_SESSION (session));
 391
 392         class = CAMEL_SERVICE_GET_CLASS (service);
 393         g_return_if_fail (class->construct != NULL);
 394
 395         class->construct (service, session, provider, url, ex);
 396 }
 397
 398 /**
 399  * camel_service_connect:
 400  * @service: a #CamelService object
 401  * @ex: a #CamelException
 402  *
 403  * Connect to the service using the parameters it was initialized
 404  * with.
 405  *
 406  * Returns: %TRUE if the connection is made or %FALSE otherwise
 407  **/
 408 gboolean
 409 camel_service_connect (CamelService *service,
 410                        CamelException *ex)
 411 {
 412         CamelServiceClass *class;
 413         gboolean ret = FALSE;
 414         gboolean unreg = FALSE;
 415         CamelOperation *connect_op;
 416
 417         g_return_val_if_fail (CAMEL_IS_SERVICE (service), FALSE);
 418         g_return_val_if_fail (service->session != NULL, FALSE);
 419         g_return_val_if_fail (service->url != NULL, FALSE);
 420
 421         class = CAMEL_SERVICE_GET_CLASS (service);
 422         g_return_val_if_fail (class->connect != NULL, FALSE);
 423
 424         CAMEL_SERVICE_REC_LOCK (service, connect_lock);
 425
 426         if (service->status == CAMEL_SERVICE_CONNECTED) {
 427                 CAMEL_SERVICE_REC_UNLOCK (service, connect_lock);
 428                 return TRUE;
 429         }
 430
 431         /* Register a separate operation for connecting, so that
 432          * the offline code can cancel it. */
 433         CAMEL_SERVICE_LOCK (service, connect_op_lock);
 434         service->connect_op = camel_operation_registered ();
 435         if (!service->connect_op) {
 436                 service->connect_op = camel_operation_new (NULL, NULL);
 437                 camel_operation_register (service->connect_op);
 438                 unreg = TRUE;
 439         }
 440         connect_op = service->connect_op;
 441         CAMEL_SERVICE_UNLOCK (service, connect_op_lock);
 442
 443         service->status = CAMEL_SERVICE_CONNECTING;
 444         ret = class->connect (service, ex);
 445         service->status = ret ? CAMEL_SERVICE_CONNECTED : CAMEL_SERVICE_DISCONNECTED;
 446
 447         CAMEL_SERVICE_LOCK (service, connect_op_lock);
 448         if (connect_op) {
 449                 if (unreg && service->connect_op)
 450                         camel_operation_unregister (connect_op);
 451
 452                 camel_operation_unref (connect_op);
 453                 service->connect_op = NULL;
 454         }
 455         CAMEL_SERVICE_UNLOCK (service, connect_op_lock);
 456
 457         CAMEL_SERVICE_REC_UNLOCK (service, connect_lock);
 458
 459         return ret;
 460 }
 461
 462 /**
 463  * camel_service_disconnect:
 464  * @service: a #CamelService object
 465  * @clean: whether or not to try to disconnect cleanly
 466  * @ex: a #CamelException
 467  *
 468  * Disconnect from the service. If @clean is %FALSE, it should not
 469  * try to do any synchronizing or other cleanup of the connection.
 470  *
 471  * Returns: %TRUE if the disconnect was successful or %FALSE otherwise
 472  **/
 473 gboolean
 474 camel_service_disconnect (CamelService *service,
 475                           gboolean clean,
 476                           CamelException *ex)
 477 {
 478         CamelServiceClass *class;
 479         gboolean res = TRUE;
 480         gint unreg = FALSE;
 481
 482         g_return_val_if_fail (CAMEL_IS_SERVICE (service), FALSE);
 483
 484         class = CAMEL_SERVICE_GET_CLASS (service);
 485         g_return_val_if_fail (class->disconnect != NULL, FALSE);
 486
 487         CAMEL_SERVICE_REC_LOCK (service, connect_lock);
 488
 489         if (service->status != CAMEL_SERVICE_DISCONNECTED
 490             && service->status != CAMEL_SERVICE_DISCONNECTING) {
 491                 CAMEL_SERVICE_LOCK (service, connect_op_lock);
 492                 service->connect_op = camel_operation_registered ();
 493                 if (!service->connect_op) {
 494                         service->connect_op = camel_operation_new (NULL, NULL);
 495                         camel_operation_register (service->connect_op);
 496                         unreg = TRUE;
 497                 }
 498                 CAMEL_SERVICE_UNLOCK (service, connect_op_lock);
 499
 500                 service->status = CAMEL_SERVICE_DISCONNECTING;
 501                 res = class->disconnect (service, clean, ex);
 502                 service->status = CAMEL_SERVICE_DISCONNECTED;
 503
 504                 CAMEL_SERVICE_LOCK (service, connect_op_lock);
 505                 if (unreg)
 506                         camel_operation_unregister (service->connect_op);
 507
 508                 camel_operation_unref (service->connect_op);
 509                 service->connect_op = NULL;
 510                 CAMEL_SERVICE_UNLOCK (service, connect_op_lock);
 511         }
 512
 513         CAMEL_SERVICE_REC_UNLOCK (service, connect_lock);
 514
 515                 service->status = CAMEL_SERVICE_DISCONNECTED;
 516         return res;
 517 }
 518
 519 /**
 520  * camel_service_cancel_connect:
 521  * @service: a #CamelService object
 522  *
 523  * If @service is currently attempting to connect to or disconnect
 524  * from a server, this causes it to stop and fail. Otherwise it is a
 525  * no-op.
 526  **/
 527 void
 528 camel_service_cancel_connect (CamelService *service)
 529 {
 530         CamelServiceClass *class;
 531
 532         g_return_if_fail (CAMEL_IS_SERVICE (service));
 533
 534         class = CAMEL_SERVICE_GET_CLASS (service);
 535         g_return_if_fail (class->cancel_connect != NULL);
 536
 537         CAMEL_SERVICE_LOCK (service, connect_op_lock);
 538         if (service->connect_op)
 539                 class->cancel_connect (service);
 540         CAMEL_SERVICE_UNLOCK (service, connect_op_lock);
 541 }
 542
 543 /**
 544  * camel_service_get_url:
 545  * @service: a #CamelService object
 546  *
 547  * Gets the URL representing @service. The returned URL must be
 548  * freed when it is no longer needed. For security reasons, this
 549  * routine does not return the password.
 550  *
 551  * Returns: the URL representing @service
 552  **/
 553 gchar *
 554 camel_service_get_url (CamelService *service)
 555 {
 556         g_return_val_if_fail (CAMEL_IS_SERVICE (service), NULL);
 557
 558         return camel_url_to_string (service->url, CAMEL_URL_HIDE_PASSWORD);
 559 }
 560
 561 /**
 562  * camel_service_get_name:
 563  * @service: a #CamelService object
 564  * @brief: whether or not to use a briefer form
 565  *
 566  * This gets the name of the service in a "friendly" (suitable for
 567  * humans) form. If @brief is %TRUE, this should be a brief description
 568  * such as for use in the folder tree. If @brief is %FALSE, it should
 569  * be a more complete and mostly unambiguous description.
 570  *
 571  * Returns: a description of the service which the caller must free
 572  **/
 573 gchar *
 574 camel_service_get_name (CamelService *service,
 575                         gboolean brief)
 576 {
 577         CamelServiceClass *class;
 578
 579         g_return_val_if_fail (CAMEL_IS_SERVICE (service), NULL);
 580         g_return_val_if_fail (service->url, NULL);
 581
 582         class = CAMEL_SERVICE_GET_CLASS (service);
 583         g_return_val_if_fail (class->get_name != NULL, NULL);
 584
 585         return class->get_name (service, brief);
 586 }
 587
 588 /**
 589  * camel_service_get_path:
 590  * @service: a #CamelService object
 591  *
 592  * This gets a valid UNIX relative path describing @service, which
 593  * is guaranteed to be different from the path returned for any
 594  * different service. This path MUST start with the name of the
 595  * provider, followed by a "/", but after that, it is up to the
 596  * provider.
 597  *
 598  * Returns: the path, which the caller must free
 599  **/
 600 gchar *
 601 camel_service_get_path (CamelService *service)
 602 {
 603         CamelServiceClass *class;
 604
 605         g_return_val_if_fail (CAMEL_IS_SERVICE (service), NULL);
 606         g_return_val_if_fail (service->url, NULL);
 607
 608         class = CAMEL_SERVICE_GET_CLASS (service);
 609         g_return_val_if_fail (class->get_path != NULL, NULL);
 610
 611         return class->get_path (service);
 612 }
 613
 614 /**
 615  * camel_service_get_session:
 616  * @service: a #CamelService object
 617  *
 618  * Gets the #CamelSession associated with the service.
 619  *
 620  * Returns: the session
 621  **/
 622 CamelSession *
 623 camel_service_get_session (CamelService *service)
 624 {
 625         g_return_val_if_fail (CAMEL_IS_SERVICE (service), NULL);
 626
 627         return service->session;
 628 }
 629
 630 /**
 631  * camel_service_get_provider:
 632  * @service: a #CamelService object
 633  *
 634  * Gets the #CamelProvider associated with the service.
 635  *
 636  * Returns: the provider
 637  **/
 638 CamelProvider *
 639 camel_service_get_provider (CamelService *service)
 640 {
 641         g_return_val_if_fail (CAMEL_IS_SERVICE (service), NULL);
 642
 643         return service->provider;
 644 }
 645
 646 /**
 647  * camel_service_query_auth_types:
 648  * @service: a #CamelService object
 649  * @ex: a #CamelException
 650  *
 651  * This is used by the mail source wizard to get the list of
 652  * authentication types supported by the protocol, and information
 653  * about them.
 654  *
 655  * Returns: a list of #CamelServiceAuthType records. The caller
 656  * must free the list with #g_list_free when it is done with it.
 657  **/
 658 GList *
 659 camel_service_query_auth_types (CamelService *service,
 660                                 CamelException *ex)
 661 {
 662         CamelServiceClass *class;
 663         GList *ret;
 664
 665         g_return_val_if_fail (CAMEL_IS_SERVICE (service), NULL);
 666
 667         class = CAMEL_SERVICE_GET_CLASS (service);
 668         g_return_val_if_fail (class->query_auth_types != NULL, NULL);
 669
 670         /* Note that we get the connect lock here, which means the
 671          * callee must not call the connect functions itself. */
 672         CAMEL_SERVICE_REC_LOCK (service, connect_lock);
 673         ret = class->query_auth_types (service, ex);
 674         CAMEL_SERVICE_REC_UNLOCK (service, connect_lock);
 675
 676         return ret;
 677 }