aboutsummaryrefslogtreecommitdiffstats
path: root/camel/camel-service.c
blob: 4df8154d98e0bf3ab72707e92b4b07b4b66ea9aa (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* camel-service.c : Abstract class for an email service */

/*
 *
 * Author :
 *  Bertrand Guiheneuf <bertrand@helixcode.com>
 *
 * Copyright 1999, 2000 Ximian, Inc. (www.ximian.com)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>

#ifdef ENABLE_THREADS
#include <pthread.h>
#include "e-util/e-msgport.h"
#endif

#include "e-util/e-host-utils.h"

#include "camel-service.h"
#include "camel-session.h"
#include "camel-exception.h"
#include "camel-operation.h"
#include "camel-private.h"

#define d(x)
#define w(x)

static CamelObjectClass *parent_class = NULL;

/* Returns the class for a CamelService */
#define CSERV_CLASS(so) CAMEL_SERVICE_CLASS (CAMEL_OBJECT_GET_CLASS(so))

static void construct (CamelService *service, CamelSession *session,
               CamelProvider *provider, CamelURL *url,
               CamelException *ex);
static gboolean service_connect(CamelService *service, CamelException *ex);
static gboolean service_disconnect(CamelService *service, gboolean clean,
                   CamelException *ex);
static void cancel_connect (CamelService *service);
static GList *  query_auth_types (CamelService *service, CamelException *ex);
static char *   get_name (CamelService *service, gboolean brief);
static char *   get_path (CamelService *service);


static void
camel_service_class_init (CamelServiceClass *camel_service_class)
{
    parent_class = camel_type_get_global_classfuncs (CAMEL_OBJECT_TYPE);

    /* virtual method definition */
    camel_service_class->construct = construct;
    camel_service_class->connect = service_connect;
    camel_service_class->disconnect = service_disconnect;
    camel_service_class->cancel_connect = cancel_connect;
    camel_service_class->query_auth_types = query_auth_types;
    camel_service_class->get_name = get_name;
    camel_service_class->get_path = get_path;
}

static void
camel_service_init (void *o, void *k)
{
    CamelService *service = o;

    service->priv = g_malloc0(sizeof(*service->priv));
#ifdef ENABLE_THREADS
    service->priv->connect_lock = e_mutex_new(E_MUTEX_REC);
    service->priv->connect_op_lock = e_mutex_new(E_MUTEX_SIMPLE);
#endif
}

static void
camel_service_finalize (CamelObject *object)
{
    CamelService *service = CAMEL_SERVICE (object);
    
    if (service->status == CAMEL_SERVICE_CONNECTED) {
        CamelException ex;
        
        camel_exception_init (&ex);
        CSERV_CLASS (service)->disconnect (service, TRUE, &ex);
        if (camel_exception_is_set (&ex)) {
            w(g_warning ("camel_service_finalize: silent disconnect failure: %s",
                     camel_exception_get_description (&ex)));
        }
        camel_exception_clear (&ex);
    }
    
    if (service->url)
        camel_url_free (service->url);
    if (service->session)
        camel_object_unref (CAMEL_OBJECT (service->session));
    
#ifdef ENABLE_THREADS
    e_mutex_destroy (service->priv->connect_lock);
    e_mutex_destroy (service->priv->connect_op_lock);
#endif
    g_free (service->priv);
}



CamelType
camel_service_get_type (void)
{
    static CamelType type = CAMEL_INVALID_TYPE;
    
    if (type == CAMEL_INVALID_TYPE) {
        type =
            camel_type_register (CAMEL_OBJECT_TYPE,
                         "CamelService",
                         sizeof (CamelService),
                         sizeof (CamelServiceClass),
                         (CamelObjectClassInitFunc) camel_service_class_init,
                         NULL,
                         (CamelObjectInitFunc) camel_service_init,
                         camel_service_finalize );
    }
    
    return type;
}


static void
construct (CamelService *service, CamelSession *session,
       CamelProvider *provider, CamelURL *url, CamelException *ex)
{
    char *url_string;
    
    if (CAMEL_PROVIDER_NEEDS (provider, CAMEL_URL_PART_USER) &&
        (url->user == NULL || url->user[0] == '\0')) {
        url_string = camel_url_to_string (url, CAMEL_URL_HIDE_PASSWORD);
        camel_exception_setv (ex, CAMEL_EXCEPTION_SERVICE_URL_INVALID,
                      _("URL '%s' needs a username component"),
                      url_string);
        g_free (url_string);
        return;
    } else if (CAMEL_PROVIDER_NEEDS (provider, CAMEL_URL_PART_HOST) &&
           (url->host == NULL || url->host[0] == '\0')) {
        url_string = camel_url_to_string (url, CAMEL_URL_HIDE_PASSWORD);
        camel_exception_setv (ex, CAMEL_EXCEPTION_SERVICE_URL_INVALID,
                      _("URL '%s' needs a host component"),
                      url_string);
        g_free (url_string);
        return;
    } else if (CAMEL_PROVIDER_NEEDS (provider, CAMEL_URL_PART_PATH) &&
           (url->path == NULL || url->path[0] == '\0')) {
        url_string = camel_url_to_string (url, CAMEL_URL_HIDE_PASSWORD);
        camel_exception_setv (ex, CAMEL_EXCEPTION_SERVICE_URL_INVALID,
                      _("URL '%s' needs a path component"),
                      url_string);
        g_free (url_string);
        return;
    }
    
    service->provider = provider;
    service->url = url;
    service->session = session;
    camel_object_ref (CAMEL_OBJECT (session));
    
    service->status = CAMEL_SERVICE_DISCONNECTED;
}

/**
 * camel_service_construct:
 * @service: the CamelService
 * @session: the session for the service
 * @provider: the service's provider
 * @url: the default URL for the service (may be NULL)
 * @ex: a CamelException
 *
 * Constructs a CamelService initialized with the given parameters.
 **/
void
camel_service_construct (CamelService *service, CamelSession *session,
             CamelProvider *provider, CamelURL *url,
             CamelException *ex)
{
    g_return_if_fail (CAMEL_IS_SERVICE (service));
    g_return_if_fail (CAMEL_IS_SESSION (session));
    
    CSERV_CLASS (service)->construct (service, session, provider, url, ex);
}


static gboolean
service_connect (CamelService *service, CamelException *ex)
{
    /* Things like the CamelMboxStore can validly
     * not define a connect function.
     */
     return TRUE;
}

/**
 * camel_service_connect:
 * @service: CamelService object
 * @ex: a CamelException
 *
 * Connect to the service using the parameters it was initialized
 * with.
 *
 * Return value: whether or not the connection succeeded
 **/

gboolean
camel_service_connect (CamelService *service, CamelException *ex)
{
    gboolean ret = FALSE;
    gboolean unreg = FALSE;
    
    g_return_val_if_fail (CAMEL_IS_SERVICE (service), FALSE);
    g_return_val_if_fail (service->session != NULL, FALSE);
    g_return_val_if_fail (service->url != NULL, FALSE);
    
    CAMEL_SERVICE_LOCK (service, connect_lock);
    
    if (service->status == CAMEL_SERVICE_CONNECTED) {
        CAMEL_SERVICE_UNLOCK (service, connect_lock);
        return TRUE;
    }

    /* Register a separate operation for connecting, so that
     * the offline code can cancel it.
     */
    CAMEL_SERVICE_LOCK (service, connect_op_lock);
    service->connect_op = camel_operation_registered ();
    if (!service->connect_op) {
        service->connect_op = camel_operation_new (NULL, NULL);
        camel_operation_register (service->connect_op);
        unreg = TRUE;
    }
    CAMEL_SERVICE_UNLOCK (service, connect_op_lock);

    service->status = CAMEL_SERVICE_CONNECTING;
    ret = CSERV_CLASS (service)->connect (service, ex);
    service->status = ret ? CAMEL_SERVICE_CONNECTED : CAMEL_SERVICE_DISCONNECTED;

    CAMEL_SERVICE_LOCK (service, connect_op_lock);
    if (unreg)
        camel_operation_unregister (service->connect_op);
    camel_operation_unref (service->connect_op);
    service->connect_op = NULL;
    CAMEL_SERVICE_UNLOCK (service, connect_op_lock);

    CAMEL_SERVICE_UNLOCK (service, connect_lock);
    
    return ret;
}

static gboolean
service_disconnect (CamelService *service, gboolean clean, CamelException *ex)
{
    /*service->connect_level--;*/

    /* We let people get away with not having a disconnect
     * function -- CamelMboxStore, for example. 
     */
    
    return TRUE;
}

/**
 * camel_service_disconnect:
 * @service: CamelService object
 * @clean: whether or not to try to disconnect cleanly.
 * @ex: a CamelException
 *
 * Disconnect from the service. If @clean is %FALSE, it should not
 * try to do any synchronizing or other cleanup of the connection.
 *
 * Return value: whether or not the disconnection succeeded without
 * errors. (Consult @ex if %FALSE.)
 **/
gboolean
camel_service_disconnect (CamelService *service, gboolean clean,
              CamelException *ex)
{
    gboolean res = TRUE;
    
    CAMEL_SERVICE_LOCK (service, connect_lock);
    
    if (service->status == CAMEL_SERVICE_CONNECTED) {
        CAMEL_SERVICE_LOCK (service, connect_op_lock);
        service->connect_op = camel_operation_registered ();
        if (!service->connect_op) {
            service->connect_op = camel_operation_new (NULL, NULL);
            camel_operation_register (service->connect_op);
        }
        CAMEL_SERVICE_UNLOCK (service, connect_op_lock);

        service->status = CAMEL_SERVICE_DISCONNECTING;
        res = CSERV_CLASS (service)->disconnect (service, clean, ex);
        service->status = CAMEL_SERVICE_DISCONNECTED;

        CAMEL_SERVICE_LOCK (service, connect_op_lock);
        camel_operation_unref (service->connect_op);
        service->connect_op = NULL;
        CAMEL_SERVICE_UNLOCK (service, connect_op_lock);
    }
    
    CAMEL_SERVICE_UNLOCK (service, connect_lock);
    
    return res;
}

static void
cancel_connect (CamelService *service)
{
    camel_operation_cancel (service->connect_op);
}

/**
 * camel_service_cancel_connect:
 * @service: a service
 *
 * If @service is currently attempting to connect to or disconnect
 * from a server, this causes it to stop and fail. Otherwise it is a
 * no-op.
 **/
void
camel_service_cancel_connect (CamelService *service)
{
    CAMEL_SERVICE_LOCK (service, connect_op_lock);
    if (service->connect_op)
        CSERV_CLASS (service)->cancel_connect (service);
    CAMEL_SERVICE_UNLOCK (service, connect_op_lock);
}

/**
 * camel_service_get_url:
 * @service: a service
 *
 * Returns the URL representing a service. The returned URL must be
 * freed when it is no longer needed. For security reasons, this
 * routine does not return the password.
 *
 * Return value: the url name
 **/
char *
camel_service_get_url (CamelService *service)
{
    return camel_url_to_string (service->url, CAMEL_URL_HIDE_PASSWORD);
}


static char *
get_name (CamelService *service, gboolean brief)
{
    w(g_warning ("CamelService::get_name not implemented for `%s'",
             camel_type_to_name (CAMEL_OBJECT_GET_TYPE (service))));
    return g_strdup ("???");
}       

/**
 * camel_service_get_name:
 * @service: the service
 * @brief: whether or not to use a briefer form
 *
 * This gets the name of the service in a "friendly" (suitable for
 * humans) form. If @brief is %TRUE, this should be a brief description
 * such as for use in the folder tree. If @brief is %FALSE, it should
 * be a more complete and mostly unambiguous description.
 *
 * Return value: the description, which the caller must free.
 **/
char *
camel_service_get_name (CamelService *service, gboolean brief)
{
    g_return_val_if_fail (CAMEL_IS_SERVICE (service), NULL);
    g_return_val_if_fail (service->url, NULL);
    
    return CSERV_CLASS (service)->get_name (service, brief);
}


static char *
get_path (CamelService *service)
{
    GString *gpath;
    char *path;
    CamelURL *url = service->url;
    CamelProvider *prov = service->provider;
    
    /* A sort of ad-hoc default implementation that works for our
     * current set of services.
     */
    
    gpath = g_string_new (service->provider->protocol);
    if (CAMEL_PROVIDER_ALLOWS (prov, CAMEL_URL_PART_USER)) {
        if (CAMEL_PROVIDER_ALLOWS (prov, CAMEL_URL_PART_HOST)) {
            g_string_sprintfa (gpath, "/%s@%s",
                       url->user ? url->user : "",
                       url->host ? url->host : "");
            
            if (url->port)
                g_string_sprintfa (gpath, ":%d", url->port);
        } else {
            g_string_sprintfa (gpath, "/%s%s",
                       url->user ? url->user : "",
                       CAMEL_PROVIDER_NEEDS (prov, CAMEL_URL_PART_USER) ? "" : "@");
        }
    } else if (CAMEL_PROVIDER_ALLOWS (prov, CAMEL_URL_PART_HOST)) {
        g_string_sprintfa (gpath, "/%s%s",
                   CAMEL_PROVIDER_NEEDS (prov, CAMEL_URL_PART_HOST) ? "" : "@",
                   url->host ? url->host : "");
        
        if (url->port)
            g_string_sprintfa (gpath, ":%d", url->port);
    }
    if (CAMEL_PROVIDER_NEEDS (prov, CAMEL_URL_PART_PATH)) {
        g_string_sprintfa (gpath, "%s%s",
                   *url->path == '/' ? "" : "/",
                   url->path);
    }
    
    path = gpath->str;
    g_string_free (gpath, FALSE);
    return path;
}       

/**
 * camel_service_get_path:
 * @service: the service
 *
 * This gets a valid UNIX relative path describing the service, which
 * is guaranteed to be different from the path returned for any
 * different service. This path MUST start with the name of the
 * provider, followed by a "/", but after that, it is up to the
 * provider.
 *
 * Return value: the path, which the caller must free.
 **/
char *
camel_service_get_path (CamelService *service)
{
    g_return_val_if_fail (CAMEL_IS_SERVICE (service), NULL);
    g_return_val_if_fail (service->url, NULL);
    
    return CSERV_CLASS (service)->get_path (service);
}


/**
 * camel_service_get_session:
 * @service: a service
 *
 * Returns the CamelSession associated with the service.
 *
 * Return value: the session
 **/
CamelSession *
camel_service_get_session (CamelService *service)
{
    return service->session;
}

/**
 * camel_service_get_provider:
 * @service: a service
 *
 * Returns the CamelProvider associated with the service.
 *
 * Return value: the provider
 **/
CamelProvider *
camel_service_get_provider (CamelService *service)
{
    return service->provider;
}

static GList *
query_auth_types (CamelService *service, CamelException *ex)
{
    return NULL;
}

/**
 * camel_service_query_auth_types:
 * @service: a CamelService
 * @ex: a CamelException
 *
 * This is used by the mail source wizard to get the list of
 * authentication types supported by the protocol, and information
 * about them.
 *
 * Return value: a list of CamelServiceAuthType records. The caller
 * must free the list with g_list_free() when it is done with it.
 **/
GList *
camel_service_query_auth_types (CamelService *service, CamelException *ex)
{
    GList *ret;
    
    /* note that we get the connect lock here, which means the callee
       must not call the connect functions itself */
    CAMEL_SERVICE_LOCK (service, connect_lock);
    ret = CSERV_CLASS (service)->query_auth_types (service, ex);
    CAMEL_SERVICE_UNLOCK (service, connect_lock);
    
    return ret;
}

/* URL utility routines */

/**
 * camel_service_gethost:
 * @service: a CamelService
 * @ex: a CamelException
 *
 * This is a convenience function to do a gethostbyname on the host
 * for the service's URL.
 *
 * Return value: a (statically-allocated) hostent.
 **/
struct hostent *
camel_service_gethost (CamelService *service, CamelException *ex)
{
    char *hostname;
    
    if (service->url->host)
        hostname = service->url->host;
    else
        hostname = "localhost";
    
    return camel_get_host_byname(hostname, ex);
}

#ifdef offsetof
#define STRUCT_OFFSET(type, field)        ((gint) offsetof (type, field))
#else
#define STRUCT_OFFSET(type, field)        ((gint) ((gchar*) &((type *) 0)->field))
#endif

struct _lookup_msg {
#ifdef ENABLE_THREADS
    EMsg msg;
#endif
    const char *name;
    int result;
    int herr;
    struct hostent hostbuf;
    int hostbuflen;
    char *hostbufmem;
};

static void *
get_host(void *data)
{
    struct _lookup_msg *info = data;

    while ((info->result = e_gethostbyname_r(info->name, &info->hostbuf, info->hostbufmem, info->hostbuflen, &info->herr)) == ERANGE) {
        d(printf("gethostbyname fialed?\n"));
#ifdef ENABLE_THREADS
        pthread_testcancel();
#endif
                info->hostbuflen *= 2;
                info->hostbufmem = g_realloc(info->hostbufmem, info->hostbuflen);
    }

    d(printf("gethostbyname ok?\n"));

#ifdef ENABLE_THREADS
    e_msgport_reply((EMsg *)info);
#endif
    return NULL;
}

struct hostent *camel_get_host_byname(const char *name, CamelException *ex)
{
#ifdef ENABLE_THREADS
    int fdmax, fd, cancel_fd;
#endif
    struct _lookup_msg *msg;

    g_return_val_if_fail(name != NULL, NULL);

    if (camel_operation_cancel_check(NULL)) {
        camel_exception_setv(ex, CAMEL_EXCEPTION_USER_CANCEL, _("Cancelled"));
        return NULL;
    }

    camel_operation_start_transient(NULL, _("Resolving: %s"), name);

    msg = g_malloc0(sizeof(*msg));
    msg->hostbuflen = 1024;
    msg->hostbufmem = g_malloc(msg->hostbuflen);
    msg->name = name;

#ifdef ENABLE_THREADS
    cancel_fd = camel_operation_cancel_fd(NULL);
    if (cancel_fd == -1) {
#endif
        get_host(msg);
#ifdef ENABLE_THREADS
    } else {
        EMsgPort *reply_port;
        pthread_t id;
        fd_set rdset;

        reply_port = msg->msg.reply_port = e_msgport_new();
        fd = e_msgport_fd(msg->msg.reply_port);
        if (pthread_create(&id, NULL, get_host, msg) == 0) {
            FD_ZERO(&rdset);
            FD_SET(cancel_fd, &rdset);
            FD_SET(fd, &rdset);
            fdmax = MAX(fd, cancel_fd) + 1;
            d(printf("waiting for name return/cancellation in main process\n"));
            if (select(fdmax, &rdset, NULL, 0, NULL) == -1) {
                camel_exception_setv(ex, 1, _("Failure in name lookup: %s"), strerror(errno));
                d(printf("Cancelling lookup thread\n"));
                pthread_cancel(id);
            } else if (FD_ISSET(cancel_fd, &rdset)) {
                d(printf("Cancelling lookup thread\n"));
                camel_exception_setv(ex, CAMEL_EXCEPTION_USER_CANCEL, _("Cancelled"));
                pthread_cancel(id);
            } else {
                struct _lookup_msg *reply = (struct _lookup_msg *)e_msgport_get(reply_port);

                g_assert(reply == msg);
            }
            d(printf("waiting for child to exit\n"));
            pthread_join(id, NULL);
            d(printf("child done\n"));
        }
        e_msgport_destroy(reply_port);
    }
#endif

    camel_operation_end(NULL);

    if (msg->herr) {
        if (!camel_exception_is_set(ex)) {
            if (msg->herr == HOST_NOT_FOUND || msg->herr == NO_DATA)
                camel_exception_setv(ex, 1, _("Host lookup failed: %s: host not found"), name);
            else
                camel_exception_setv(ex, 1, _("Host lookup failed: %s: unknown reason"), name);
        }
        g_free(msg->hostbufmem);
        g_free(msg);
        return NULL;
    } else {
        return &msg->hostbuf;
    }
}

void camel_free_host(struct hostent *h)
{
    struct _lookup_msg *msg;

    g_return_if_fail(h != NULL);

    /* yeah this looks ugly but it is safe.  we passed out a reference to inside our structure, this maps it
       to the base structure, so we can free everything right without having to keep track of it separately */
    msg = (struct _lookup_msg *)(((char *)h) - STRUCT_OFFSET(struct _lookup_msg, hostbuf));

    g_free(msg->hostbufmem);
    g_free(msg);
}