fix compile error
[claws.git] / src / imap.c
1 /*
2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
3  * Copyright (C) 1999-2003 Hiroyuki Yamamoto
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation; either version 2 of the License, or
8  * (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18  */
19
20 #ifdef HAVE_CONFIG_H
21 #  include "config.h"
22 #endif
23
24 #include "defs.h"
25
26 #include <glib.h>
27 #include <stdio.h>
28 #include <string.h>
29 #include <stdlib.h>
30 #include <dirent.h>
31 #include <unistd.h>
32 #include <ctype.h>
33 #include <time.h>
34 #if HAVE_ICONV
35 #  include <iconv.h>
36 #endif
37
38 #if USE_OPENSSL
39 #  include "ssl.h"
40 #endif
41 #include "folder.h"
42 #include "session.h"
43 #include "procmsg.h"
44 #include "intl.h"
45 #include "imap.h"
46 #include "socket.h"
47 #include "ssl.h"
48 #include "recv.h"
49 #include "procheader.h"
50 #include "prefs_account.h"
51 #include "codeconv.h"
52 #include "md5.h"
53 #include "base64.h"
54 #include "utils.h"
55 #include "inputdialog.h"
56 #include "log.h"
57
58 typedef struct _IMAPFolder      IMAPFolder;
59 typedef struct _IMAPSession     IMAPSession;
60 typedef struct _IMAPNameSpace   IMAPNameSpace;
61 typedef struct _IMAPFolderItem  IMAPFolderItem;
62
63 #include "prefs_account.h"
64
65 #define IMAP_FOLDER(obj)        ((IMAPFolder *)obj)
66 #define IMAP_SESSION(obj)       ((IMAPSession *)obj)
67
68 struct _IMAPFolder
69 {
70         RemoteFolder rfolder;
71
72         /* list of IMAPNameSpace */
73         GList *ns_personal;
74         GList *ns_others;
75         GList *ns_shared;
76 };
77
78 struct _IMAPSession
79 {
80         Session session;
81
82         gboolean authenticated;
83
84         gchar **capability;
85         gboolean uidplus;
86
87         gchar *mbox;
88         guint cmd_count;
89
90         /* CLAWS */
91         time_t last_access_time;
92         gboolean folder_content_changed;
93         guint exists;
94 };
95
96 struct _IMAPNameSpace
97 {
98         gchar *name;
99         gchar separator;
100 };
101
102 #define IMAP_SUCCESS    0
103 #define IMAP_SOCKET     2
104 #define IMAP_AUTHFAIL   3
105 #define IMAP_PROTOCOL   4
106 #define IMAP_SYNTAX     5
107 #define IMAP_IOERR      6
108 #define IMAP_ERROR      7
109
110 #define IMAPBUFSIZE     8192
111
112 typedef enum
113 {
114         IMAP_FLAG_SEEN          = 1 << 0,
115         IMAP_FLAG_ANSWERED      = 1 << 1,
116         IMAP_FLAG_FLAGGED       = 1 << 2,
117         IMAP_FLAG_DELETED       = 1 << 3,
118         IMAP_FLAG_DRAFT         = 1 << 4
119 } IMAPFlags;
120
121 #define IMAP_IS_SEEN(flags)     ((flags & IMAP_FLAG_SEEN) != 0)
122 #define IMAP_IS_ANSWERED(flags) ((flags & IMAP_FLAG_ANSWERED) != 0)
123 #define IMAP_IS_FLAGGED(flags)  ((flags & IMAP_FLAG_FLAGGED) != 0)
124 #define IMAP_IS_DELETED(flags)  ((flags & IMAP_FLAG_DELETED) != 0)
125 #define IMAP_IS_DRAFT(flags)    ((flags & IMAP_FLAG_DRAFT) != 0)
126
127
128 #define IMAP4_PORT      143
129 #if USE_OPENSSL
130 #define IMAPS_PORT      993
131 #endif
132
133 #define IMAP_CMD_LIMIT  1000
134
135 #define QUOTE_IF_REQUIRED(out, str)                             \
136 {                                                               \
137         if (*str != '"' && strpbrk(str, " \t(){}%*") != NULL) { \
138                 gchar *__tmp;                                   \
139                 gint len;                                       \
140                                                                 \
141                 len = strlen(str) + 3;                          \
142                 Xalloca(__tmp, len, return IMAP_ERROR);         \
143                 g_snprintf(__tmp, len, "\"%s\"", str);          \
144                 out = __tmp;                                    \
145         } else {                                                \
146                 Xstrdup_a(out, str, return IMAP_ERROR);         \
147         }                                                       \
148 }
149
150 typedef gchar * IMAPSet;
151
152 struct _IMAPFolderItem
153 {
154         FolderItem item;
155
156         guint lastuid;
157         guint uid_next;
158         GSList *uid_list;
159 };
160
161 static Folder *imap_folder_new(const gchar * name, const gchar * path);
162 static void imap_folder_destroy(Folder * folder);
163
164 static IMAPSession *imap_session_new(const PrefsAccount * account);
165 static void imap_session_authenticate(IMAPSession * session,
166                                       const PrefsAccount * account);
167 static void imap_session_destroy(Session * session);
168
169 static gchar *imap_fetch_msg(Folder * folder, FolderItem * item, gint uid);
170 static gint imap_add_msg(Folder * folder,
171                          FolderItem * dest,
172                          const gchar * file, MsgFlags * flags);
173 static gint imap_add_msgs(Folder * folder, FolderItem * dest,
174                           GSList * file_list,
175                           GRelation *relation);
176
177 static gint imap_copy_msg(Folder * folder,
178                           FolderItem * dest, MsgInfo * msginfo);
179 static gint imap_copy_msgs(Folder *folder, FolderItem *dest, 
180                     MsgInfoList *msglist, GRelation *relation);
181
182 static gint imap_remove_msg(Folder * folder, FolderItem * item, gint uid);
183 static gint imap_remove_all_msg(Folder * folder, FolderItem * item);
184
185 static gboolean imap_is_msg_changed(Folder * folder,
186                                     FolderItem * item, MsgInfo * msginfo);
187
188 static gint imap_close(Folder * folder, FolderItem * item);
189
190 static void imap_scan_tree(Folder * folder);
191
192 static gint imap_create_tree(Folder * folder);
193
194 static FolderItem *imap_create_folder(Folder * folder,
195                                       FolderItem * parent,
196                                       const gchar * name);
197 static gint imap_rename_folder(Folder * folder,
198                                FolderItem * item, const gchar * name);
199 static gint imap_remove_folder(Folder * folder, FolderItem * item);
200
201
202 static void imap_folder_init            (Folder         *folder,
203                                          const gchar    *name,
204                                          const gchar    *path);
205
206 static FolderItem *imap_folder_item_new (Folder         *folder);
207 static void imap_folder_item_destroy    (Folder         *folder,
208                                          FolderItem     *item);
209
210 static IMAPSession *imap_session_get    (Folder         *folder);
211
212 static gint imap_greeting               (IMAPSession    *session);
213 static gint imap_auth                   (IMAPSession    *session,
214                                          const gchar    *user,
215                                          const gchar    *pass,
216                                          IMAPAuthType    type);
217
218 static gint imap_scan_tree_recursive    (IMAPSession    *session,
219                                          FolderItem     *item);
220 static GSList *imap_parse_list          (IMAPFolder     *folder,
221                                          IMAPSession    *session,
222                                          const gchar    *real_path,
223                                          gchar          *separator);
224
225 static void imap_create_missing_folders (Folder                 *folder);
226 static FolderItem *imap_create_special_folder
227                                         (Folder                 *folder,
228                                          SpecialFolderItemType   stype,
229                                          const gchar            *name);
230
231 static gint imap_do_copy_msgs           (Folder         *folder,
232                                          FolderItem     *dest,
233                                          MsgInfoList    *msglist,
234                                          GRelation      *relation);
235
236 static void imap_delete_all_cached_messages     (FolderItem     *item);
237
238 #if USE_OPENSSL
239 static SockInfo *imap_open              (const gchar    *server,
240                                          gushort         port,
241                                          SSLType         ssl_type);
242 #else
243 static SockInfo *imap_open              (const gchar    *server,
244                                          gushort         port);
245 #endif
246
247 #if USE_OPENSSL
248 static SockInfo *imap_open_tunnel(const gchar *server,
249                                   const gchar *tunnelcmd,
250                                   SSLType ssl_type);
251 #else
252 static SockInfo *imap_open_tunnel(const gchar *server,
253                                   const gchar *tunnelcmd);
254 #endif
255
256 #if USE_OPENSSL
257 static SockInfo *imap_init_sock(SockInfo *sock, SSLType ssl_type);
258 #else
259 static SockInfo *imap_init_sock(SockInfo *sock);
260 #endif
261
262 static gchar *imap_get_flag_str         (IMAPFlags       flags);
263 static gint imap_set_message_flags      (IMAPSession    *session,
264                                          MsgNumberList  *numlist,
265                                          IMAPFlags       flags,
266                                          gboolean        is_set);
267 static gint imap_select                 (IMAPSession    *session,
268                                          IMAPFolder     *folder,
269                                          const gchar    *path,
270                                          gint           *exists,
271                                          gint           *recent,
272                                          gint           *unseen,
273                                          guint32        *uid_validity);
274 static gint imap_status                 (IMAPSession    *session,
275                                          IMAPFolder     *folder,
276                                          const gchar    *path,
277                                          gint           *messages,
278                                          gint           *recent,
279                                          guint32        *uid_next,
280                                          guint32        *uid_validity,
281                                          gint           *unseen);
282
283 static void imap_parse_namespace                (IMAPSession    *session,
284                                                  IMAPFolder     *folder);
285 static void imap_get_namespace_by_list          (IMAPSession    *session,
286                                                  IMAPFolder     *folder);
287 static IMAPNameSpace *imap_find_namespace       (IMAPFolder     *folder,
288                                                  const gchar    *path);
289 static gchar imap_get_path_separator            (IMAPFolder     *folder,
290                                                  const gchar    *path);
291 static gchar *imap_get_real_path                (IMAPFolder     *folder,
292                                                  const gchar    *path);
293
294 static gchar *imap_parse_atom           (SockInfo       *sock,
295                                          gchar          *src,
296                                          gchar          *dest,
297                                          gint            dest_len,
298                                          GString        *str);
299 static MsgFlags imap_parse_flags        (const gchar    *flag_str);
300 static MsgInfo *imap_parse_envelope     (SockInfo       *sock,
301                                          FolderItem     *item,
302                                          GString        *line_str);
303
304 static gboolean imap_has_capability     (IMAPSession    *session,
305                                          const gchar    *cap);
306 static void imap_free_capabilities      (IMAPSession    *session);
307
308 /* low-level IMAP4rev1 commands */
309 static gint imap_cmd_authenticate
310                                 (IMAPSession    *session,
311                                  const gchar    *user,
312                                  const gchar    *pass,
313                                  IMAPAuthType    type);
314 static gint imap_cmd_login      (IMAPSession    *sock,
315                                  const gchar    *user,
316                                  const gchar    *pass);
317 static gint imap_cmd_logout     (IMAPSession    *sock);
318 static gint imap_cmd_noop       (IMAPSession    *sock);
319 static gint imap_cmd_starttls   (IMAPSession    *sock);
320 static gint imap_cmd_namespace  (IMAPSession    *sock,
321                                  gchar         **ns_str);
322 static gint imap_cmd_list       (IMAPSession    *session,
323                                  const gchar    *ref,
324                                  const gchar    *mailbox,
325                                  GPtrArray      *argbuf);
326 static gint imap_cmd_do_select  (IMAPSession    *sock,
327                                  const gchar    *folder,
328                                  gboolean        examine,
329                                  gint           *exists,
330                                  gint           *recent,
331                                  gint           *unseen,
332                                  guint32        *uid_validity);
333 static gint imap_cmd_select     (IMAPSession    *sock,
334                                  const gchar    *folder,
335                                  gint           *exists,
336                                  gint           *recent,
337                                  gint           *unseen,
338                                  guint32        *uid_validity);
339 static gint imap_cmd_examine    (IMAPSession    *sock,
340                                  const gchar    *folder,
341                                  gint           *exists,
342                                  gint           *recent,
343                                  gint           *unseen,
344                                  guint32        *uid_validity);
345 static gint imap_cmd_create     (IMAPSession    *sock,
346                                  const gchar    *folder);
347 static gint imap_cmd_rename     (IMAPSession    *sock,
348                                  const gchar    *oldfolder,
349                                  const gchar    *newfolder);
350 static gint imap_cmd_delete     (IMAPSession    *sock,
351                                  const gchar    *folder);
352 static gint imap_cmd_envelope   (IMAPSession    *sock,
353                                  IMAPSet         set);
354 static gint imap_cmd_fetch      (IMAPSession    *sock,
355                                  guint32         uid,
356                                  const gchar    *filename);
357 static gint imap_cmd_append     (IMAPSession    *session,
358                                  const gchar    *destfolder,
359                                  const gchar    *file,
360                                  IMAPFlags       flags,
361                                  guint32        *new_uid);
362 static gint imap_cmd_copy       (IMAPSession    *session, 
363                                  const gchar    *seq_set, 
364                                  const gchar    *destfolder,
365                                  GRelation      *uid_mapping);
366 static gint imap_cmd_store      (IMAPSession    *sock,
367                                  IMAPSet         set,
368                                  gchar          *sub_cmd);
369 static gint imap_cmd_expunge    (IMAPSession    *sock);
370 static gint imap_cmd_close     (IMAPSession    *session);
371
372 static gint imap_cmd_ok         (IMAPSession    *session,
373                                  GPtrArray      *argbuf);
374 static void imap_gen_send       (IMAPSession    *sock,
375                                  const gchar    *format, ...);
376 static gint imap_gen_recv       (IMAPSession    *sock,
377                                  gchar         **ret);
378
379 /* misc utility functions */
380 static gchar *strchr_cpy                        (const gchar    *src,
381                                                  gchar           ch,
382                                                  gchar          *dest,
383                                                  gint            len);
384 static gchar *get_quoted                        (const gchar    *src,
385                                                  gchar           ch,
386                                                  gchar          *dest,
387                                                  gint            len);
388 static gchar *search_array_contain_str          (GPtrArray      *array,
389                                                  const gchar    *str);
390 static gchar *search_array_str                  (GPtrArray      *array,
391                                                  const gchar    *str);
392 static void imap_path_separator_subst           (gchar          *str,
393                                                  gchar           separator);
394
395 static gchar *imap_modified_utf7_to_locale      (const gchar    *mutf7_str);
396 static gchar *imap_locale_to_modified_utf7      (const gchar    *from);
397
398 static GSList *imap_get_seq_set_from_numlist    (MsgNumberList  *msglist);
399 static GSList *imap_get_seq_set_from_msglist    (MsgInfoList    *msglist);
400 static void imap_seq_set_free                   (GSList         *seq_list);
401
402 static gboolean imap_rename_folder_func         (GNode          *node,
403                                                  gpointer        data);
404 static gint imap_get_num_list                   (Folder         *folder,
405                                                  FolderItem     *item,
406                                                  GSList        **list,
407                                                  gboolean       *old_uids_valid);
408 static GSList *imap_get_msginfos                (Folder         *folder,
409                                                  FolderItem     *item,
410                                                  GSList         *msgnum_list);
411 static MsgInfo *imap_get_msginfo                (Folder         *folder,
412                                                  FolderItem     *item,
413                                                  gint            num);
414 static gboolean imap_scan_required              (Folder         *folder,
415                                                  FolderItem     *item);
416 static void imap_change_flags                   (Folder         *folder,
417                                                  FolderItem     *item,
418                                                  MsgInfo        *msginfo,
419                                                  MsgPermFlags   newflags);
420 static gchar *imap_folder_get_path              (Folder         *folder);
421 static gchar *imap_item_get_path                (Folder         *folder,
422                                                  FolderItem     *item);
423
424 FolderClass imap_class =
425 {
426         F_IMAP,
427         "imap",
428         "IMAP4",
429
430         /* Folder functions */
431         imap_folder_new,
432         imap_folder_destroy,
433         imap_scan_tree,
434         imap_create_tree,
435
436         /* FolderItem functions */
437         imap_folder_item_new,
438         imap_folder_item_destroy,
439         imap_item_get_path,
440         imap_create_folder,
441         imap_rename_folder,
442         imap_remove_folder,
443         imap_close,
444         imap_get_num_list,
445         NULL,
446         NULL,
447         NULL,
448         imap_scan_required,
449
450         /* Message functions */
451         imap_get_msginfo,
452         imap_get_msginfos,
453         imap_fetch_msg,
454         imap_add_msg,
455         imap_add_msgs,
456         imap_copy_msg,
457         imap_copy_msgs,
458         imap_remove_msg,
459         imap_remove_all_msg,
460         imap_is_msg_changed,
461         imap_change_flags,
462 };
463
464 FolderClass *imap_get_class(void)
465 {
466         return &imap_class;
467 }
468
469 Folder *imap_folder_new(const gchar *name, const gchar *path)
470 {
471         Folder *folder;
472
473         folder = (Folder *)g_new0(IMAPFolder, 1);
474         folder->klass = &imap_class;
475         imap_folder_init(folder, name, path);
476
477         return folder;
478 }
479
480 void imap_folder_destroy(Folder *folder)
481 {
482         gchar *dir;
483
484         dir = imap_folder_get_path(folder);
485         if (is_dir_exist(dir))
486                 remove_dir_recursive(dir);
487         g_free(dir);
488
489         folder_remote_folder_destroy(REMOTE_FOLDER(folder));
490 }
491
492 static void imap_folder_init(Folder *folder, const gchar *name,
493                              const gchar *path)
494 {
495         folder_remote_folder_init((Folder *)folder, name, path);
496 }
497
498 static FolderItem *imap_folder_item_new(Folder *folder)
499 {
500         IMAPFolderItem *item;
501         
502         item = g_new0(IMAPFolderItem, 1);
503         item->lastuid = 0;
504         item->uid_next = 0;
505         item->uid_list = NULL;
506
507         return (FolderItem *)item;
508 }
509
510 static void imap_folder_item_destroy(Folder *folder, FolderItem *_item)
511 {
512         IMAPFolderItem *item = (IMAPFolderItem *)_item;
513
514         g_return_if_fail(item != NULL);
515         g_slist_free(item->uid_list);
516
517         g_free(_item);
518 }
519
520 static gboolean imap_reset_uid_lists_func(GNode *node, gpointer data)
521 {
522         IMAPFolderItem *item = (IMAPFolderItem *)node->data;
523         
524         item->lastuid = 0;
525         item->uid_next = 0;
526         g_slist_free(item->uid_list);
527         item->uid_list = NULL;
528         
529         return FALSE;
530 }
531
532 static void imap_reset_uid_lists(Folder *folder)
533 {
534         if(folder->node == NULL)
535                 return;
536         
537         /* Destroy all uid lists and rest last uid */
538         g_node_traverse(folder->node, G_IN_ORDER, G_TRAVERSE_ALL, -1, imap_reset_uid_lists_func, NULL); 
539 }
540
541 /* Send CAPABILITY, and examine the server's response to see whether this
542  * connection is pre-authenticated or not and build a list of CAPABILITIES. */
543 static gint imap_greeting(IMAPSession *session)
544 {
545         gchar *capstr;
546         GPtrArray *argbuf;
547
548         imap_gen_send(session, "CAPABILITY");
549         
550         argbuf = g_ptr_array_new();
551
552         if (imap_cmd_ok(session, argbuf) != IMAP_SUCCESS ||
553             ((capstr = search_array_str(argbuf, "CAPABILITY ")) == NULL)) {
554                 ptr_array_free_strings(argbuf);
555                 g_ptr_array_free(argbuf, TRUE);
556                 return -1;
557         }
558
559         session->authenticated = search_array_str(argbuf, "PREAUTH") != NULL;
560         
561         capstr += strlen("CAPABILITY ");
562
563         IMAP_SESSION(session)->capability = g_strsplit(capstr, " ", 0);
564         
565         ptr_array_free_strings(argbuf);
566         g_ptr_array_free(argbuf, TRUE);
567
568         if (imap_has_capability(session, "UIDPLUS")) 
569                 session->uidplus = TRUE; 
570
571         return 0;
572 }
573
574 static gint imap_auth(IMAPSession *session, const gchar *user, const gchar *pass,
575                       IMAPAuthType type)
576 {
577         gint ok;
578
579         if (type == 0 || type == IMAP_AUTH_LOGIN)
580                 ok = imap_cmd_login(session, user, pass);
581         else
582                 ok = imap_cmd_authenticate(session, user, pass, type);
583
584         if (ok == IMAP_SUCCESS)
585                 session->authenticated = TRUE;
586
587         return ok;
588 }
589
590 static IMAPSession *imap_session_get(Folder *folder)
591 {
592         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
593         IMAPSession *session = NULL;
594
595         g_return_val_if_fail(folder != NULL, NULL);
596         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, NULL);
597         g_return_val_if_fail(folder->account != NULL, NULL);
598
599         /* Make sure we have a session */
600         if (rfolder->session != NULL) {
601                 session = IMAP_SESSION(rfolder->session);
602         } else {
603                 imap_reset_uid_lists(folder);
604                 session = imap_session_new(folder->account);
605         }
606         if(session == NULL)
607                 return NULL;
608
609         if (SESSION(session)->sock->state == CONN_DISCONNECTED) {
610                 debug_print("IMAP server disconnected\n");
611                 session_destroy(SESSION(session));
612                 imap_reset_uid_lists(folder);
613                 session = imap_session_new(folder->account);
614         }
615
616         /* Make sure session is authenticated */
617         if (!IMAP_SESSION(session)->authenticated)
618                 imap_session_authenticate(IMAP_SESSION(session), folder->account);
619         if (!IMAP_SESSION(session)->authenticated) {
620                 session_destroy(SESSION(session));
621                 rfolder->session = NULL;
622                 return NULL;
623         }
624
625         /* Make sure we have parsed the IMAP namespace */
626         imap_parse_namespace(IMAP_SESSION(session),
627                              IMAP_FOLDER(folder));
628
629         /* I think the point of this code is to avoid sending a
630          * keepalive if we've used the session recently and therefore
631          * think it's still alive.  Unfortunately, most of the code
632          * does not yet check for errors on the socket, and so if the
633          * connection drops we don't notice until the timeout expires.
634          * A better solution than sending a NOOP every time would be
635          * for every command to be prepared to retry until it is
636          * successfully sent. -- mbp */
637         if (time(NULL) - session->last_access_time > SESSION_TIMEOUT) {
638                 /* verify that the session is still alive */
639                 if (imap_cmd_noop(session) != IMAP_SUCCESS) {
640                         /* Check if this is the first try to establish a
641                            connection, if yes we don't try to reconnect */
642                         if (rfolder->session == NULL) {
643                                 log_warning(_("Connecting %s failed"),
644                                             folder->account->recv_server);
645                                 session_destroy(SESSION(session));
646                                 session = NULL;
647                         } else {
648                                 log_warning(_("IMAP4 connection to %s has been"
649                                               " disconnected. Reconnecting...\n"),
650                                             folder->account->recv_server);
651                                 session_destroy(SESSION(session));
652                                 /* Clear folders session to make imap_session_get create
653                                    a new session, because of rfolder->session == NULL
654                                    it will not try to reconnect again and so avoid an
655                                    endless loop */
656                                 rfolder->session = NULL;
657                                 session = imap_session_get(folder);
658                         }
659                 }
660         }
661
662         rfolder->session = SESSION(session);
663         if (session) {
664                 session->last_access_time = time(NULL);
665         }
666         return IMAP_SESSION(session);
667 }
668
669 IMAPSession *imap_session_new(const PrefsAccount *account)
670 {
671         IMAPSession *session;
672         SockInfo *imap_sock;
673         gushort port;
674
675 #ifdef USE_OPENSSL
676         /* FIXME: IMAP over SSL only... */ 
677         SSLType ssl_type;
678
679         port = account->set_imapport ? account->imapport
680                 : account->ssl_imap == SSL_TUNNEL ? IMAPS_PORT : IMAP4_PORT;
681         ssl_type = account->ssl_imap;   
682 #else
683         port = account->set_imapport ? account->imapport
684                 : IMAP4_PORT;
685 #endif
686
687         if (account->set_tunnelcmd) {
688                 log_message(_("creating tunneled IMAP4 connection\n"));
689 #if USE_OPENSSL
690                 if ((imap_sock = imap_open_tunnel(account->recv_server, 
691                                                   account->tunnelcmd,
692                                                   ssl_type)) == NULL)
693 #else
694                 if ((imap_sock = imap_open_tunnel(account->recv_server, 
695                                                   account->tunnelcmd)) == NULL)
696 #endif
697                         return NULL;
698         } else {
699                 g_return_val_if_fail(account->recv_server != NULL, NULL);
700
701                 log_message(_("creating IMAP4 connection to %s:%d ...\n"),
702                             account->recv_server, port);
703                 
704 #if USE_OPENSSL
705                 if ((imap_sock = imap_open(account->recv_server, port,
706                                            ssl_type)) == NULL)
707 #else
708                 if ((imap_sock = imap_open(account->recv_server, port)) == NULL)
709 #endif
710                         return NULL;
711         }
712
713         session = g_new0(IMAPSession, 1);
714         session_init(SESSION(session));
715         SESSION(session)->type             = SESSION_IMAP;
716         SESSION(session)->server           = g_strdup(account->recv_server);
717         SESSION(session)->sock             = imap_sock;
718
719         SESSION(session)->destroy          = imap_session_destroy;
720
721         session->capability = NULL;
722
723         session->authenticated = FALSE;
724         session->mbox = NULL;
725         session->cmd_count = 0;
726
727         /* Only need to log in if the connection was not PREAUTH */
728         if (imap_greeting(session) != IMAP_SUCCESS) {
729                 session_destroy(SESSION(session));
730                 return NULL;
731         }
732
733 #if USE_OPENSSL
734         if (account->ssl_imap == SSL_STARTTLS && 
735             imap_has_capability(session, "STARTTLS")) {
736                 gint ok;
737
738                 ok = imap_cmd_starttls(session);
739                 if (ok != IMAP_SUCCESS) {
740                         log_warning(_("Can't start TLS session.\n"));
741                         session_destroy(SESSION(session));
742                         return NULL;
743                 }
744                 if (!ssl_init_socket_with_method(SESSION(session)->sock, SSL_METHOD_TLSv1)) {
745                         session_destroy(SESSION(session));
746                         return NULL;
747                 }
748
749                 imap_free_capabilities(session);
750                 session->authenticated = FALSE;
751                 session->uidplus = FALSE;
752                 session->cmd_count = 1;
753
754                 if (imap_greeting(session) != IMAP_SUCCESS) {
755                         session_destroy(SESSION(session));
756                         return NULL;
757                 }               
758         }
759 #endif
760         log_message("IMAP connection is %s-authenticated\n",
761                     (session->authenticated) ? "pre" : "un");
762
763         return session;
764 }
765
766 void imap_session_authenticate(IMAPSession *session, const PrefsAccount *account)
767 {
768         gchar *pass;
769
770         g_return_if_fail(account->userid != NULL);
771
772         pass = account->passwd;
773         if (!pass) {
774                 gchar *tmp_pass;
775                 tmp_pass = input_dialog_query_password(account->recv_server, account->userid);
776                 if (!tmp_pass)
777                         return;
778                 Xstrdup_a(pass, tmp_pass, {g_free(tmp_pass); return;});
779                 g_free(tmp_pass);
780         }
781
782         if (imap_auth(session, account->userid, pass, account->imap_auth_type) != IMAP_SUCCESS) {
783                 imap_cmd_logout(session);
784                 return;
785         }
786
787         session->authenticated = TRUE;
788 }
789
790 void imap_session_destroy(Session *session)
791 {
792         imap_free_capabilities(IMAP_SESSION(session));
793         g_free(IMAP_SESSION(session)->mbox);
794         sock_close(session->sock);
795         session->sock = NULL;
796 }
797
798 gchar *imap_fetch_msg(Folder *folder, FolderItem *item, gint uid)
799 {
800         gchar *path, *filename;
801         IMAPSession *session;
802         gint ok;
803
804         g_return_val_if_fail(folder != NULL, NULL);
805         g_return_val_if_fail(item != NULL, NULL);
806
807         path = folder_item_get_path(item);
808         if (!is_dir_exist(path))
809                 make_dir_hier(path);
810         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(uid), NULL);
811         g_free(path);
812  
813         if (is_file_exist(filename)) {
814                 debug_print("message %d has been already cached.\n", uid);
815                 return filename;
816         }
817
818         session = imap_session_get(folder);
819         if (!session) {
820                 g_free(filename);
821                 return NULL;
822         }
823
824         ok = imap_select(session, IMAP_FOLDER(folder), item->path,
825                          NULL, NULL, NULL, NULL);
826         if (ok != IMAP_SUCCESS) {
827                 g_warning("can't select mailbox %s\n", item->path);
828                 g_free(filename);
829                 return NULL;
830         }
831
832         debug_print("getting message %d...\n", uid);
833         ok = imap_cmd_fetch(session, (guint32)uid, filename);
834
835         if (ok != IMAP_SUCCESS) {
836                 g_warning("can't fetch message %d\n", uid);
837                 g_free(filename);
838                 return NULL;
839         }
840
841         return filename;
842 }
843
844 gint imap_add_msg(Folder *folder, FolderItem *dest, const gchar *file, MsgFlags *flags)
845 {
846         gint ret;
847         GSList file_list;
848         MsgFileInfo fileinfo;
849
850         g_return_val_if_fail(file != NULL, -1);
851
852         fileinfo.msginfo = NULL;
853         fileinfo.file = (gchar *)file;
854         fileinfo.flags = flags;
855         file_list.data = &fileinfo;
856         file_list.next = NULL;
857
858         ret = imap_add_msgs(folder, dest, &file_list, NULL);
859         return ret;
860 }
861
862 gint imap_add_msgs(Folder *folder, FolderItem *dest, GSList *file_list,
863                    GRelation *relation)
864 {
865         gchar *destdir;
866         IMAPSession *session;
867         guint32 last_uid = 0;
868         GSList *cur;
869         MsgFileInfo *fileinfo;
870         gint ok;
871
872         g_return_val_if_fail(folder != NULL, -1);
873         g_return_val_if_fail(dest != NULL, -1);
874         g_return_val_if_fail(file_list != NULL, -1);
875
876         session = imap_session_get(folder);
877         if (!session) return -1;
878
879         destdir = imap_get_real_path(IMAP_FOLDER(folder), dest->path);
880
881         for (cur = file_list; cur != NULL; cur = cur->next) {
882                 IMAPFlags iflags = 0;
883                 guint32 new_uid = 0;
884
885                 fileinfo = (MsgFileInfo *)cur->data;
886
887                 if (fileinfo->flags) {
888                         if (MSG_IS_MARKED(*fileinfo->flags))
889                                 iflags |= IMAP_FLAG_FLAGGED;
890                         if (MSG_IS_REPLIED(*fileinfo->flags))
891                                 iflags |= IMAP_FLAG_ANSWERED;
892                         if (!MSG_IS_UNREAD(*fileinfo->flags))
893                                 iflags |= IMAP_FLAG_SEEN;
894                 }
895
896                 if (dest->stype == F_OUTBOX ||
897                     dest->stype == F_QUEUE  ||
898                     dest->stype == F_DRAFT  ||
899                     dest->stype == F_TRASH)
900                         iflags |= IMAP_FLAG_SEEN;
901
902                 ok = imap_cmd_append(session, destdir, fileinfo->file, iflags, 
903                                      &new_uid);
904
905                 if (ok != IMAP_SUCCESS) {
906                         g_warning("can't append message %s\n", fileinfo->file);
907                         g_free(destdir);
908                         return -1;
909                 }
910
911                 if (relation != NULL)
912                         g_relation_insert(relation, fileinfo->msginfo != NULL ? 
913                                           (gpointer) fileinfo->msginfo : (gpointer) fileinfo,
914                                           GINT_TO_POINTER(dest->last_num + 1));
915                 if (last_uid < new_uid)
916                         last_uid = new_uid;
917         }
918
919         g_free(destdir);
920
921         return last_uid;
922 }
923
924 static gint imap_do_copy_msgs(Folder *folder, FolderItem *dest, 
925                               MsgInfoList *msglist, GRelation *relation)
926 {
927         FolderItem *src;
928         gchar *destdir;
929         GSList *seq_list, *cur;
930         MsgInfo *msginfo;
931         IMAPSession *session;
932         gint ok = IMAP_SUCCESS;
933         GRelation *uid_mapping;
934         gint last_num = 0;
935         
936         g_return_val_if_fail(folder != NULL, -1);
937         g_return_val_if_fail(dest != NULL, -1);
938         g_return_val_if_fail(msglist != NULL, -1);
939
940         session = imap_session_get(folder);
941         if (!session) return -1;
942
943         msginfo = (MsgInfo *)msglist->data;
944
945         src = msginfo->folder;
946         if (src == dest) {
947                 g_warning("the src folder is identical to the dest.\n");
948                 return -1;
949         }
950
951         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder->path,
952                          NULL, NULL, NULL, NULL);
953         if (ok != IMAP_SUCCESS)
954                 return ok;
955
956         destdir = imap_get_real_path(IMAP_FOLDER(folder), dest->path);
957         seq_list = imap_get_seq_set_from_msglist(msglist);
958         uid_mapping = g_relation_new(2);
959         g_relation_index(uid_mapping, 0, g_direct_hash, g_direct_equal);
960         
961         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
962                 gchar *seq_set = (gchar *)cur->data;
963
964                 debug_print("Copying message %s%c[%s] to %s ...\n",
965                             src->path, G_DIR_SEPARATOR,
966                             seq_set, destdir);
967
968                 ok = imap_cmd_copy(session, seq_set, destdir, uid_mapping);
969                 if (ok != IMAP_SUCCESS) {
970                         g_relation_destroy(uid_mapping);
971                         imap_seq_set_free(seq_list);
972                         return -1;
973                 }
974         }
975
976         for (cur = msglist; cur != NULL; cur = g_slist_next(cur)) {
977                 MsgInfo *msginfo = (MsgInfo *)cur->data;
978                 GTuples *tuples;
979                 
980                 tuples = g_relation_select(uid_mapping, 
981                                            GINT_TO_POINTER(msginfo->msgnum),
982                                            0);
983                 if (tuples->len > 0) {
984                         gint num = GPOINTER_TO_INT(g_tuples_index(tuples, 0, 1));
985                         g_relation_insert(relation, msginfo,
986                                           GPOINTER_TO_INT(num));
987                         if (num > last_num)
988                                 last_num = num;
989                 } else
990                         g_relation_insert(relation, msginfo,
991                                           GPOINTER_TO_INT(0));
992                 g_tuples_destroy(tuples);
993         }
994         
995         imap_seq_set_free(seq_list);
996
997         g_free(destdir);
998
999         if (ok == IMAP_SUCCESS)
1000                 return last_num;
1001         else
1002                 return -1;
1003 }
1004
1005 gint imap_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
1006 {
1007         GSList msglist;
1008
1009         g_return_val_if_fail(msginfo != NULL, -1);
1010
1011         msglist.data = msginfo;
1012         msglist.next = NULL;
1013
1014         return imap_copy_msgs(folder, dest, &msglist, NULL);
1015 }
1016
1017 gint imap_copy_msgs(Folder *folder, FolderItem *dest, 
1018                     MsgInfoList *msglist, GRelation *relation)
1019 {
1020         MsgInfo *msginfo;
1021         GSList *file_list;
1022         gint ret;
1023
1024         g_return_val_if_fail(folder != NULL, -1);
1025         g_return_val_if_fail(dest != NULL, -1);
1026         g_return_val_if_fail(msglist != NULL, -1);
1027
1028         msginfo = (MsgInfo *)msglist->data;
1029         g_return_val_if_fail(msginfo->folder != NULL, -1);
1030
1031         if (folder == msginfo->folder->folder)
1032                 return imap_do_copy_msgs(folder, dest, msglist, relation);
1033
1034         file_list = procmsg_get_message_file_list(msglist);
1035         g_return_val_if_fail(file_list != NULL, -1);
1036
1037         ret = imap_add_msgs(folder, dest, file_list, relation);
1038
1039         procmsg_message_file_list_free(file_list);
1040
1041         return ret;
1042 }
1043
1044 gint imap_remove_msg(Folder *folder, FolderItem *item, gint uid)
1045 {
1046         gint ok;
1047         IMAPSession *session;
1048         gchar *dir;
1049         MsgNumberList numlist;
1050         
1051         g_return_val_if_fail(folder != NULL, -1);
1052         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
1053         g_return_val_if_fail(item != NULL, -1);
1054
1055         session = imap_session_get(folder);
1056         if (!session) return -1;
1057
1058         ok = imap_select(session, IMAP_FOLDER(folder), item->path,
1059                          NULL, NULL, NULL, NULL);
1060         if (ok != IMAP_SUCCESS)
1061                 return ok;
1062
1063         numlist.next = NULL;
1064         numlist.data = GINT_TO_POINTER(uid);
1065         
1066         ok = imap_set_message_flags
1067                 (IMAP_SESSION(REMOTE_FOLDER(folder)->session),
1068                 &numlist, IMAP_FLAG_DELETED, TRUE);
1069         if (ok != IMAP_SUCCESS) {
1070                 log_warning(_("can't set deleted flags: %d\n"), uid);
1071                 return ok;
1072         }
1073
1074         ok = imap_cmd_expunge(session);
1075         if (ok != IMAP_SUCCESS) {
1076                 log_warning(_("can't expunge\n"));
1077                 return ok;
1078         }
1079
1080         dir = folder_item_get_path(item);
1081         if (is_dir_exist(dir))
1082                 remove_numbered_files(dir, uid, uid);
1083         g_free(dir);
1084
1085         return IMAP_SUCCESS;
1086 }
1087
1088 gint imap_remove_all_msg(Folder *folder, FolderItem *item)
1089 {
1090         gint ok;
1091         IMAPSession *session;
1092         gchar *dir;
1093
1094         g_return_val_if_fail(folder != NULL, -1);
1095         g_return_val_if_fail(item != NULL, -1);
1096
1097         session = imap_session_get(folder);
1098         if (!session) return -1;
1099
1100         ok = imap_select(session, IMAP_FOLDER(folder), item->path,
1101                          NULL, NULL, NULL, NULL);
1102         if (ok != IMAP_SUCCESS)
1103                 return ok;
1104
1105         imap_gen_send(session, "STORE 1:* +FLAGS.SILENT (\\Deleted)");
1106         ok = imap_cmd_ok(session, NULL);
1107         if (ok != IMAP_SUCCESS) {
1108                 log_warning(_("can't set deleted flags: 1:*\n"));
1109                 return ok;
1110         }
1111
1112         ok = imap_cmd_expunge(session);
1113         if (ok != IMAP_SUCCESS) {
1114                 log_warning(_("can't expunge\n"));
1115                 return ok;
1116         }
1117
1118         dir = folder_item_get_path(item);
1119         if (is_dir_exist(dir))
1120                 remove_all_numbered_files(dir);
1121         g_free(dir);
1122
1123         return IMAP_SUCCESS;
1124 }
1125
1126 gboolean imap_is_msg_changed(Folder *folder, FolderItem *item, MsgInfo *msginfo)
1127 {
1128         /* TODO: properly implement this method */
1129         return FALSE;
1130 }
1131
1132 gint imap_close(Folder *folder, FolderItem *item)
1133 {
1134         gint ok;
1135         IMAPSession *session;
1136
1137         g_return_val_if_fail(folder != NULL, -1);
1138         g_return_val_if_fail(item != NULL, -1);
1139         g_return_val_if_fail(item->path != NULL, -1);
1140
1141         session = imap_session_get(folder);
1142         if (!session) return -1;
1143
1144         if (session->mbox) {
1145                 if (strcmp(item->path, session->mbox))
1146                         return -1;
1147
1148                 ok = imap_cmd_close(session);
1149                 if (ok != IMAP_SUCCESS)
1150                         log_warning(_("can't close folder\n"));
1151
1152                 g_free(session->mbox);
1153                 session->mbox = NULL;
1154
1155                 return ok;
1156         }
1157
1158         return 0;
1159 }
1160
1161 void imap_scan_tree(Folder *folder)
1162 {
1163         FolderItem *item = NULL;
1164         IMAPSession *session;
1165         gchar *root_folder = NULL;
1166
1167         g_return_if_fail(folder != NULL);
1168         g_return_if_fail(folder->account != NULL);
1169
1170         session = imap_session_get(folder);
1171         if (!session) {
1172                 if (!folder->node) {
1173                         folder_tree_destroy(folder);
1174                         item = folder_item_new(folder, folder->name, NULL);
1175                         item->folder = folder;
1176                         folder->node = item->node = g_node_new(item);
1177                 }
1178                 return;
1179         }
1180
1181         if (folder->account->imap_dir && *folder->account->imap_dir) {
1182                 Xstrdup_a(root_folder, folder->account->imap_dir, return);
1183                 strtailchomp(root_folder, '/');
1184                 debug_print("IMAP root directory: %s\n", root_folder);
1185         }
1186
1187         if (folder->node)
1188                 item = FOLDER_ITEM(folder->node->data);
1189         if (!item || ((item->path || root_folder) &&
1190                       strcmp2(item->path, root_folder) != 0)) {
1191                 folder_tree_destroy(folder);
1192                 item = folder_item_new(folder, folder->name, root_folder);
1193                 item->folder = folder;
1194                 folder->node = item->node = g_node_new(item);
1195         }
1196
1197         imap_scan_tree_recursive(session, FOLDER_ITEM(folder->node->data));
1198         imap_create_missing_folders(folder);
1199 }
1200
1201 static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item)
1202 {
1203         Folder *folder;
1204         IMAPFolder *imapfolder;
1205         FolderItem *new_item;
1206         GSList *item_list, *cur;
1207         GNode *node;
1208         gchar *real_path;
1209         gchar *wildcard_path;
1210         gchar separator;
1211         gchar wildcard[3];
1212
1213         g_return_val_if_fail(item != NULL, -1);
1214         g_return_val_if_fail(item->folder != NULL, -1);
1215         g_return_val_if_fail(item->no_sub == FALSE, -1);
1216
1217         folder = item->folder;
1218         imapfolder = IMAP_FOLDER(folder);
1219
1220         separator = imap_get_path_separator(imapfolder, item->path);
1221
1222         if (folder->ui_func)
1223                 folder->ui_func(folder, item, folder->ui_func_data);
1224
1225         if (item->path) {
1226                 wildcard[0] = separator;
1227                 wildcard[1] = '%';
1228                 wildcard[2] = '\0';
1229                 real_path = imap_get_real_path(imapfolder, item->path);
1230         } else {
1231                 wildcard[0] = '%';
1232                 wildcard[1] = '\0';
1233                 real_path = g_strdup("");
1234         }
1235
1236         Xstrcat_a(wildcard_path, real_path, wildcard,
1237                   {g_free(real_path); return IMAP_ERROR;});
1238         QUOTE_IF_REQUIRED(wildcard_path, wildcard_path);
1239
1240         imap_gen_send(session, "LIST \"\" %s",
1241                       wildcard_path);
1242
1243         strtailchomp(real_path, separator);
1244         item_list = imap_parse_list(imapfolder, session, real_path, NULL);
1245         g_free(real_path);
1246
1247         node = item->node->children;
1248         while (node != NULL) {
1249                 FolderItem *old_item = FOLDER_ITEM(node->data);
1250                 GNode *next = node->next;
1251
1252                 new_item = NULL;
1253                 for (cur = item_list; cur != NULL; cur = cur->next) {
1254                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
1255                         if (!strcmp2(old_item->path, cur_item->path)) {
1256                                 new_item = cur_item;
1257                                 break;
1258                         }
1259                 }
1260                 if (!new_item) {
1261                         debug_print("folder '%s' not found. removing...\n",
1262                                     old_item->path);
1263                         folder_item_remove(old_item);
1264                 } else {
1265                         old_item->no_sub = new_item->no_sub;
1266                         old_item->no_select = new_item->no_select;
1267                         if (old_item->no_sub == TRUE && node->children) {
1268                                 debug_print("folder '%s' doesn't have "
1269                                             "subfolders. removing...\n",
1270                                             old_item->path);
1271                                 folder_item_remove_children(old_item);
1272                         }
1273                 }
1274
1275                 node = next;
1276         }
1277
1278         for (cur = item_list; cur != NULL; cur = cur->next) {
1279                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
1280                 new_item = NULL;
1281                 for (node = item->node->children; node != NULL;
1282                      node = node->next) {
1283                         if (!strcmp2(FOLDER_ITEM(node->data)->path,
1284                                      cur_item->path)) {
1285                                 new_item = FOLDER_ITEM(node->data);
1286                                 folder_item_destroy(cur_item);
1287                                 cur_item = NULL;
1288                                 break;
1289                         }
1290                 }
1291                 if (!new_item) {
1292                         new_item = cur_item;
1293                         debug_print("new folder '%s' found.\n", new_item->path);
1294                         folder_item_append(item, new_item);
1295                 }
1296
1297                 if (!strcmp(new_item->path, "INBOX")) {
1298                         new_item->stype = F_INBOX;
1299                         folder->inbox = new_item;
1300                 } else if (!item->parent || item->stype == F_INBOX) {
1301                         gchar *base;
1302
1303                         base = g_basename(new_item->path);
1304
1305                         if (!folder->outbox && !strcasecmp(base, "Sent")) {
1306                                 new_item->stype = F_OUTBOX;
1307                                 folder->outbox = new_item;
1308                         } else if (!folder->draft && !strcasecmp(base, "Drafts")) {
1309                                 new_item->stype = F_DRAFT;
1310                                 folder->draft = new_item;
1311                         } else if (!folder->queue && !strcasecmp(base, "Queue")) {
1312                                 new_item->stype = F_QUEUE;
1313                                 folder->queue = new_item;
1314                         } else if (!folder->trash && !strcasecmp(base, "Trash")) {
1315                                 new_item->stype = F_TRASH;
1316                                 folder->trash = new_item;
1317                         }
1318                 }
1319
1320                 if (new_item->no_sub == FALSE)
1321                         imap_scan_tree_recursive(session, new_item);
1322         }
1323
1324         g_slist_free(item_list);
1325
1326         return IMAP_SUCCESS;
1327 }
1328
1329 static GSList *imap_parse_list(IMAPFolder *folder, IMAPSession *session,
1330                                const gchar *real_path, gchar *separator)
1331 {
1332         gchar buf[IMAPBUFSIZE];
1333         gchar flags[256];
1334         gchar separator_str[16];
1335         gchar *p;
1336         gchar *name;
1337         gchar *loc_name, *loc_path;
1338         GSList *item_list = NULL;
1339         GString *str;
1340         FolderItem *new_item;
1341
1342         debug_print("getting list of %s ...\n",
1343                     *real_path ? real_path : "\"\"");
1344
1345         str = g_string_new(NULL);
1346
1347         for (;;) {
1348                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) <= 0) {
1349                         log_warning(_("error occurred while getting LIST.\n"));
1350                         break;
1351                 }
1352                 strretchomp(buf);
1353                 if (buf[0] != '*' || buf[1] != ' ') {
1354                         log_print("IMAP4< %s\n", buf);
1355                         break;
1356                 }
1357                 debug_print("IMAP4< %s\n", buf);
1358
1359                 g_string_assign(str, buf);
1360                 p = str->str + 2;
1361                 if (strncmp(p, "LIST ", 5) != 0) continue;
1362                 p += 5;
1363
1364                 if (*p != '(') continue;
1365                 p++;
1366                 p = strchr_cpy(p, ')', flags, sizeof(flags));
1367                 if (!p) continue;
1368                 while (*p == ' ') p++;
1369
1370                 p = strchr_cpy(p, ' ', separator_str, sizeof(separator_str));
1371                 if (!p) continue;
1372                 extract_quote(separator_str, '"');
1373                 if (!strcmp(separator_str, "NIL"))
1374                         separator_str[0] = '\0';
1375                 if (separator)
1376                         *separator = separator_str[0];
1377
1378                 buf[0] = '\0';
1379                 while (*p == ' ') p++;
1380                 if (*p == '{' || *p == '"')
1381                         p = imap_parse_atom(SESSION(session)->sock, p,
1382                                             buf, sizeof(buf), str);
1383                 else
1384                         strncpy2(buf, p, sizeof(buf));
1385                 strtailchomp(buf, separator_str[0]);
1386                 if (buf[0] == '\0') continue;
1387                 if (!strcmp(buf, real_path)) continue;
1388
1389                 if (separator_str[0] != '\0')
1390                         subst_char(buf, separator_str[0], '/');
1391                 name = g_basename(buf);
1392                 if (name[0] == '.') continue;
1393
1394                 loc_name = imap_modified_utf7_to_locale(name);
1395                 loc_path = imap_modified_utf7_to_locale(buf);
1396                 new_item = folder_item_new(FOLDER(folder), loc_name, loc_path);
1397                 if (strcasestr(flags, "\\Noinferiors") != NULL)
1398                         new_item->no_sub = TRUE;
1399                 if (strcmp(buf, "INBOX") != 0 &&
1400                     strcasestr(flags, "\\Noselect") != NULL)
1401                         new_item->no_select = TRUE;
1402
1403                 item_list = g_slist_append(item_list, new_item);
1404
1405                 debug_print("folder '%s' found.\n", loc_path);
1406                 g_free(loc_path);
1407                 g_free(loc_name);
1408         }
1409
1410         g_string_free(str, TRUE);
1411
1412         return item_list;
1413 }
1414
1415 gint imap_create_tree(Folder *folder)
1416 {
1417         g_return_val_if_fail(folder != NULL, -1);
1418         g_return_val_if_fail(folder->node != NULL, -1);
1419         g_return_val_if_fail(folder->node->data != NULL, -1);
1420         g_return_val_if_fail(folder->account != NULL, -1);
1421
1422         imap_scan_tree(folder);
1423         imap_create_missing_folders(folder);
1424
1425         return 0;
1426 }
1427
1428 static void imap_create_missing_folders(Folder *folder)
1429 {
1430         g_return_if_fail(folder != NULL);
1431
1432         if (!folder->inbox)
1433                 folder->inbox = imap_create_special_folder
1434                         (folder, F_INBOX, "INBOX");
1435 #if 0
1436         if (!folder->outbox)
1437                 folder->outbox = imap_create_special_folder
1438                         (folder, F_OUTBOX, "Sent");
1439         if (!folder->draft)
1440                 folder->draft = imap_create_special_folder
1441                         (folder, F_DRAFT, "Drafts");
1442         if (!folder->queue)
1443                 folder->queue = imap_create_special_folder
1444                         (folder, F_QUEUE, "Queue");
1445 #endif
1446         if (!folder->trash)
1447                 folder->trash = imap_create_special_folder
1448                         (folder, F_TRASH, "Trash");
1449 }
1450
1451 static FolderItem *imap_create_special_folder(Folder *folder,
1452                                               SpecialFolderItemType stype,
1453                                               const gchar *name)
1454 {
1455         FolderItem *item;
1456         FolderItem *new_item;
1457
1458         g_return_val_if_fail(folder != NULL, NULL);
1459         g_return_val_if_fail(folder->node != NULL, NULL);
1460         g_return_val_if_fail(folder->node->data != NULL, NULL);
1461         g_return_val_if_fail(folder->account != NULL, NULL);
1462         g_return_val_if_fail(name != NULL, NULL);
1463
1464         item = FOLDER_ITEM(folder->node->data);
1465         new_item = imap_create_folder(folder, item, name);
1466
1467         if (!new_item) {
1468                 g_warning("Can't create '%s'\n", name);
1469                 if (!folder->inbox) return NULL;
1470
1471                 new_item = imap_create_folder(folder, folder->inbox, name);
1472                 if (!new_item)
1473                         g_warning("Can't create '%s' under INBOX\n", name);
1474                 else
1475                         new_item->stype = stype;
1476         } else
1477                 new_item->stype = stype;
1478
1479         return new_item;
1480 }
1481
1482 static gchar *imap_folder_get_path(Folder *folder)
1483 {
1484         gchar *folder_path;
1485
1486         g_return_val_if_fail(folder != NULL, NULL);
1487         g_return_val_if_fail(folder->account != NULL, NULL);
1488
1489         folder_path = g_strconcat(get_imap_cache_dir(),
1490                                   G_DIR_SEPARATOR_S,
1491                                   folder->account->recv_server,
1492                                   G_DIR_SEPARATOR_S,
1493                                   folder->account->userid,
1494                                   NULL);
1495
1496         return folder_path;
1497 }
1498
1499 static gchar *imap_item_get_path(Folder *folder, FolderItem *item)
1500 {
1501         gchar *folder_path, *path;
1502
1503         g_return_val_if_fail(folder != NULL, NULL);
1504         g_return_val_if_fail(item != NULL, NULL);
1505         folder_path = imap_folder_get_path(folder);
1506
1507         g_return_val_if_fail(folder_path != NULL, NULL);
1508         if (folder_path[0] == G_DIR_SEPARATOR) {
1509                 if (item->path)
1510                         path = g_strconcat(folder_path, G_DIR_SEPARATOR_S,
1511                                            item->path, NULL);
1512                 else
1513                         path = g_strdup(folder_path);
1514         } else {
1515                 if (item->path)
1516                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
1517                                            folder_path, G_DIR_SEPARATOR_S,
1518                                            item->path, NULL);
1519                 else
1520                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
1521                                            folder_path, NULL);
1522         }
1523         g_free(folder_path);
1524
1525         return path;
1526 }
1527
1528 FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
1529                                const gchar *name)
1530 {
1531         gchar *dirpath, *imap_path;
1532         IMAPSession *session;
1533         FolderItem *new_item;
1534         gchar separator;
1535         gchar *new_name;
1536         const gchar *p;
1537         gint ok;
1538
1539         g_return_val_if_fail(folder != NULL, NULL);
1540         g_return_val_if_fail(folder->account != NULL, NULL);
1541         g_return_val_if_fail(parent != NULL, NULL);
1542         g_return_val_if_fail(name != NULL, NULL);
1543
1544         session = imap_session_get(folder);
1545         if (!session) return NULL;
1546
1547         if (!parent->parent && strcmp(name, "INBOX") == 0)
1548                 dirpath = g_strdup(name);
1549         else if (parent->path)
1550                 dirpath = g_strconcat(parent->path, "/", name, NULL);
1551         else if ((p = strchr(name, '/')) != NULL && *(p + 1) != '\0')
1552                 dirpath = g_strdup(name);
1553         else if (folder->account->imap_dir && *folder->account->imap_dir) {
1554                 gchar *imap_dir;
1555
1556                 Xstrdup_a(imap_dir, folder->account->imap_dir, return NULL);
1557                 strtailchomp(imap_dir, '/');
1558                 dirpath = g_strconcat(imap_dir, "/", name, NULL);
1559         } else
1560                 dirpath = g_strdup(name);
1561
1562         /* keep trailing directory separator to create a folder that contains
1563            sub folder */
1564         imap_path = imap_locale_to_modified_utf7(dirpath);
1565         strtailchomp(dirpath, '/');
1566         Xstrdup_a(new_name, name, {g_free(dirpath); return NULL;});
1567         strtailchomp(new_name, '/');
1568         separator = imap_get_path_separator(IMAP_FOLDER(folder), imap_path);
1569         imap_path_separator_subst(imap_path, separator);
1570         subst_char(new_name, '/', separator);
1571
1572         if (strcmp(name, "INBOX") != 0) {
1573                 GPtrArray *argbuf;
1574                 gint i;
1575                 gboolean exist = FALSE;
1576
1577                 argbuf = g_ptr_array_new();
1578                 ok = imap_cmd_list(session, NULL, imap_path,
1579                                    argbuf);
1580                 if (ok != IMAP_SUCCESS) {
1581                         log_warning(_("can't create mailbox: LIST failed\n"));
1582                         g_free(imap_path);
1583                         g_free(dirpath);
1584                         ptr_array_free_strings(argbuf);
1585                         g_ptr_array_free(argbuf, TRUE);
1586                         return NULL;
1587                 }
1588
1589                 for (i = 0; i < argbuf->len; i++) {
1590                         gchar *str;
1591                         str = g_ptr_array_index(argbuf, i);
1592                         if (!strncmp(str, "LIST ", 5)) {
1593                                 exist = TRUE;
1594                                 break;
1595                         }
1596                 }
1597                 ptr_array_free_strings(argbuf);
1598                 g_ptr_array_free(argbuf, TRUE);
1599
1600                 if (!exist) {
1601                         ok = imap_cmd_create(session, imap_path);
1602                         if (ok != IMAP_SUCCESS) {
1603                                 log_warning(_("can't create mailbox\n"));
1604                                 g_free(imap_path);
1605                                 g_free(dirpath);
1606                                 return NULL;
1607                         }
1608                 }
1609         }
1610
1611         new_item = folder_item_new(folder, new_name, dirpath);
1612         folder_item_append(parent, new_item);
1613         g_free(imap_path);
1614         g_free(dirpath);
1615
1616         dirpath = folder_item_get_path(new_item);
1617         if (!is_dir_exist(dirpath))
1618                 make_dir_hier(dirpath);
1619         g_free(dirpath);
1620
1621         return new_item;
1622 }
1623
1624 gint imap_rename_folder(Folder *folder, FolderItem *item, const gchar *name)
1625 {
1626         gchar *dirpath;
1627         gchar *newpath;
1628         gchar *real_oldpath;
1629         gchar *real_newpath;
1630         gchar *paths[2];
1631         gchar *old_cache_dir;
1632         gchar *new_cache_dir;
1633         IMAPSession *session;
1634         gchar separator;
1635         gint ok;
1636         gint exists, recent, unseen;
1637         guint32 uid_validity;
1638
1639         g_return_val_if_fail(folder != NULL, -1);
1640         g_return_val_if_fail(item != NULL, -1);
1641         g_return_val_if_fail(item->path != NULL, -1);
1642         g_return_val_if_fail(name != NULL, -1);
1643
1644         session = imap_session_get(folder);
1645         if (!session) return -1;
1646
1647         real_oldpath = imap_get_real_path(IMAP_FOLDER(folder), item->path);
1648
1649         g_free(session->mbox);
1650         session->mbox = NULL;
1651         ok = imap_cmd_examine(session, "INBOX",
1652                               &exists, &recent, &unseen, &uid_validity);
1653         if (ok != IMAP_SUCCESS) {
1654                 g_free(real_oldpath);
1655                 return -1;
1656         }
1657
1658         separator = imap_get_path_separator(IMAP_FOLDER(folder), item->path);
1659         if (strchr(item->path, G_DIR_SEPARATOR)) {
1660                 dirpath = g_dirname(item->path);
1661                 newpath = g_strconcat(dirpath, G_DIR_SEPARATOR_S, name, NULL);
1662                 g_free(dirpath);
1663         } else
1664                 newpath = g_strdup(name);
1665
1666         real_newpath = imap_locale_to_modified_utf7(newpath);
1667         imap_path_separator_subst(real_newpath, separator);
1668
1669         ok = imap_cmd_rename(session, real_oldpath, real_newpath);
1670         if (ok != IMAP_SUCCESS) {
1671                 log_warning(_("can't rename mailbox: %s to %s\n"),
1672                             real_oldpath, real_newpath);
1673                 g_free(real_oldpath);
1674                 g_free(newpath);
1675                 g_free(real_newpath);
1676                 return -1;
1677         }
1678
1679         g_free(item->name);
1680         item->name = g_strdup(name);
1681
1682         old_cache_dir = folder_item_get_path(item);
1683
1684         paths[0] = g_strdup(item->path);
1685         paths[1] = newpath;
1686         g_node_traverse(item->node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
1687                         imap_rename_folder_func, paths);
1688
1689         if (is_dir_exist(old_cache_dir)) {
1690                 new_cache_dir = folder_item_get_path(item);
1691                 if (rename(old_cache_dir, new_cache_dir) < 0) {
1692                         FILE_OP_ERROR(old_cache_dir, "rename");
1693                 }
1694                 g_free(new_cache_dir);
1695         }
1696
1697         g_free(old_cache_dir);
1698         g_free(paths[0]);
1699         g_free(newpath);
1700         g_free(real_oldpath);
1701         g_free(real_newpath);
1702
1703         return 0;
1704 }
1705
1706 gint imap_remove_folder(Folder *folder, FolderItem *item)
1707 {
1708         gint ok;
1709         IMAPSession *session;
1710         gchar *path;
1711         gchar *cache_dir;
1712         gint exists, recent, unseen;
1713         guint32 uid_validity;
1714
1715         g_return_val_if_fail(folder != NULL, -1);
1716         g_return_val_if_fail(item != NULL, -1);
1717         g_return_val_if_fail(item->path != NULL, -1);
1718
1719         session = imap_session_get(folder);
1720         if (!session) return -1;
1721
1722         path = imap_get_real_path(IMAP_FOLDER(folder), item->path);
1723
1724         ok = imap_cmd_examine(session, "INBOX",
1725                               &exists, &recent, &unseen, &uid_validity);
1726         if (ok != IMAP_SUCCESS) {
1727                 g_free(path);
1728                 return -1;
1729         }
1730
1731         ok = imap_cmd_delete(session, path);
1732         if (ok != IMAP_SUCCESS) {
1733                 log_warning(_("can't delete mailbox\n"));
1734                 g_free(path);
1735                 return -1;
1736         }
1737
1738         g_free(path);
1739         cache_dir = folder_item_get_path(item);
1740         if (is_dir_exist(cache_dir) && remove_dir_recursive(cache_dir) < 0)
1741                 g_warning("can't remove directory '%s'\n", cache_dir);
1742         g_free(cache_dir);
1743         folder_item_remove(item);
1744
1745         return 0;
1746 }
1747
1748 static GSList *imap_get_uncached_messages(IMAPSession *session,
1749                                           FolderItem *item,
1750                                           MsgNumberList *numlist)
1751 {
1752         gchar *tmp;
1753         GSList *newlist = NULL;
1754         GSList *llast = NULL;
1755         GString *str;
1756         MsgInfo *msginfo;
1757         GSList *seq_list, *cur;
1758         IMAPSet imapset;
1759
1760         g_return_val_if_fail(session != NULL, NULL);
1761         g_return_val_if_fail(item != NULL, NULL);
1762         g_return_val_if_fail(item->folder != NULL, NULL);
1763         g_return_val_if_fail(FOLDER_CLASS(item->folder) == &imap_class, NULL);
1764
1765         seq_list = imap_get_seq_set_from_numlist(numlist);
1766         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
1767                 imapset = cur->data;
1768
1769                 if (imap_cmd_envelope(session, imapset)
1770                     != IMAP_SUCCESS) {
1771                         log_warning(_("can't get envelope\n"));
1772                         continue;
1773                 }
1774
1775                 str = g_string_new(NULL);
1776
1777                 for (;;) {
1778                         if ((tmp = sock_getline(SESSION(session)->sock)) == NULL) {
1779                                 log_warning(_("error occurred while getting envelope.\n"));
1780                                 g_string_free(str, TRUE);
1781                                 break;
1782                         }
1783                         strretchomp(tmp);
1784                         if (tmp[0] != '*' || tmp[1] != ' ') {
1785                                 log_print("IMAP4< %s\n", tmp);
1786                                 g_free(tmp);
1787                                 break;
1788                         }
1789                         if (strstr(tmp, "FETCH") == NULL) {
1790                                 log_print("IMAP4< %s\n", tmp);
1791                                 g_free(tmp);
1792                                 continue;
1793                         }
1794                         log_print("IMAP4< %s\n", tmp);
1795                         g_string_assign(str, tmp);
1796                         g_free(tmp);
1797
1798                         msginfo = imap_parse_envelope
1799                                 (SESSION(session)->sock, item, str);
1800                         if (!msginfo) {
1801                                 log_warning(_("can't parse envelope: %s\n"), str->str);
1802                                 continue;
1803                         }
1804                         if (item->stype == F_QUEUE) {
1805                                 MSG_SET_TMP_FLAGS(msginfo->flags, MSG_QUEUED);
1806                         } else if (item->stype == F_DRAFT) {
1807                                 MSG_SET_TMP_FLAGS(msginfo->flags, MSG_DRAFT);
1808                         }
1809
1810                         msginfo->folder = item;
1811
1812                         if (!newlist)
1813                                 llast = newlist = g_slist_append(newlist, msginfo);
1814                         else {
1815                                 llast = g_slist_append(llast, msginfo);
1816                                 llast = llast->next;
1817                         }
1818                 }
1819
1820                 g_string_free(str, TRUE);
1821         }
1822         imap_seq_set_free(seq_list);
1823
1824         return newlist;
1825 }
1826
1827 static void imap_delete_all_cached_messages(FolderItem *item)
1828 {
1829         gchar *dir;
1830
1831         g_return_if_fail(item != NULL);
1832         g_return_if_fail(item->folder != NULL);
1833         g_return_if_fail(FOLDER_CLASS(item->folder) == &imap_class);
1834
1835         debug_print("Deleting all cached messages...\n");
1836
1837         dir = folder_item_get_path(item);
1838         if (is_dir_exist(dir))
1839                 remove_all_numbered_files(dir);
1840         g_free(dir);
1841
1842         debug_print("done.\n");
1843 }
1844
1845 #if USE_OPENSSL
1846 static SockInfo *imap_open_tunnel(const gchar *server,
1847                            const gchar *tunnelcmd,
1848                            SSLType ssl_type)
1849 #else
1850 static SockInfo *imap_open_tunnel(const gchar *server,
1851                            const gchar *tunnelcmd)
1852 #endif
1853 {
1854         SockInfo *sock;
1855
1856         if ((sock = sock_connect_cmd(server, tunnelcmd)) == NULL) {
1857                 log_warning(_("Can't establish IMAP4 session with: %s\n"),
1858                             server);
1859                 return NULL;
1860         }
1861 #if USE_OPENSSL
1862         return imap_init_sock(sock, ssl_type);
1863 #else
1864         return imap_init_sock(sock);
1865 #endif
1866 }
1867
1868
1869 #if USE_OPENSSL
1870 static SockInfo *imap_open(const gchar *server, gushort port,
1871                            SSLType ssl_type)
1872 #else
1873 static SockInfo *imap_open(const gchar *server, gushort port)
1874 #endif
1875 {
1876         SockInfo *sock;
1877
1878         if ((sock = sock_connect(server, port)) == NULL) {
1879                 log_warning(_("Can't connect to IMAP4 server: %s:%d\n"),
1880                             server, port);
1881                 return NULL;
1882         }
1883
1884 #if USE_OPENSSL
1885         if (ssl_type == SSL_TUNNEL && !ssl_init_socket(sock)) {
1886                 log_warning(_("Can't establish IMAP4 session with: %s:%d\n"),
1887                             server, port);
1888                 sock_close(sock);
1889                 return NULL;
1890         }
1891 #endif
1892         return sock;
1893 }
1894
1895 #if USE_OPENSSL
1896 static SockInfo *imap_init_sock(SockInfo *sock, SSLType ssl_type)
1897 #else
1898 static SockInfo *imap_init_sock(SockInfo *sock)
1899 #endif
1900 {
1901
1902         return sock;
1903 }
1904
1905 static GList *imap_parse_namespace_str(gchar *str)
1906 {
1907         gchar *p = str;
1908         gchar *name;
1909         gchar *separator;
1910         IMAPNameSpace *namespace;
1911         GList *ns_list = NULL;
1912
1913         while (*p != '\0') {
1914                 /* parse ("#foo" "/") */
1915
1916                 while (*p && *p != '(') p++;
1917                 if (*p == '\0') break;
1918                 p++;
1919
1920                 while (*p && *p != '"') p++;
1921                 if (*p == '\0') break;
1922                 p++;
1923                 name = p;
1924
1925                 while (*p && *p != '"') p++;
1926                 if (*p == '\0') break;
1927                 *p = '\0';
1928                 p++;
1929
1930                 while (*p && isspace(*p)) p++;
1931                 if (*p == '\0') break;
1932                 if (strncmp(p, "NIL", 3) == 0)
1933                         separator = NULL;
1934                 else if (*p == '"') {
1935                         p++;
1936                         separator = p;
1937                         while (*p && *p != '"') p++;
1938                         if (*p == '\0') break;
1939                         *p = '\0';
1940                         p++;
1941                 } else break;
1942
1943                 while (*p && *p != ')') p++;
1944                 if (*p == '\0') break;
1945                 p++;
1946
1947                 namespace = g_new(IMAPNameSpace, 1);
1948                 namespace->name = g_strdup(name);
1949                 namespace->separator = separator ? separator[0] : '\0';
1950                 ns_list = g_list_append(ns_list, namespace);
1951         }
1952
1953         return ns_list;
1954 }
1955
1956 static void imap_parse_namespace(IMAPSession *session, IMAPFolder *folder)
1957 {
1958         gchar *ns_str;
1959         gchar **str_array;
1960
1961         g_return_if_fail(session != NULL);
1962         g_return_if_fail(folder != NULL);
1963
1964         if (folder->ns_personal != NULL ||
1965             folder->ns_others   != NULL ||
1966             folder->ns_shared   != NULL)
1967                 return;
1968
1969         if (!imap_has_capability(session, "NAMESPACE")) {
1970                 imap_get_namespace_by_list(session, folder);
1971                 return;
1972         }
1973         
1974         if (imap_cmd_namespace(session, &ns_str)
1975             != IMAP_SUCCESS) {
1976                 log_warning(_("can't get namespace\n"));
1977                 return;
1978         }
1979
1980         str_array = strsplit_parenthesis(ns_str, '(', ')', 3);
1981         if (str_array == NULL) {
1982                 g_free(ns_str);
1983                 imap_get_namespace_by_list(session, folder);
1984                 return;
1985         }
1986         if (str_array[0])
1987                 folder->ns_personal = imap_parse_namespace_str(str_array[0]);
1988         if (str_array[0] && str_array[1])
1989                 folder->ns_others = imap_parse_namespace_str(str_array[1]);
1990         if (str_array[0] && str_array[1] && str_array[2])
1991                 folder->ns_shared = imap_parse_namespace_str(str_array[2]);
1992         g_strfreev(str_array);
1993         g_free(ns_str);
1994 }
1995
1996 static void imap_get_namespace_by_list(IMAPSession *session, IMAPFolder *folder)
1997 {
1998         GSList *item_list, *cur;
1999         gchar separator = '\0';
2000         IMAPNameSpace *namespace;
2001
2002         g_return_if_fail(session != NULL);
2003         g_return_if_fail(folder != NULL);
2004
2005         if (folder->ns_personal != NULL ||
2006             folder->ns_others   != NULL ||
2007             folder->ns_shared   != NULL)
2008                 return;
2009
2010         imap_gen_send(session, "LIST \"\" \"\"");
2011         item_list = imap_parse_list(folder, session, "", &separator);
2012         for (cur = item_list; cur != NULL; cur = cur->next)
2013                 folder_item_destroy(FOLDER_ITEM(cur->data));
2014         g_slist_free(item_list);
2015
2016         namespace = g_new(IMAPNameSpace, 1);
2017         namespace->name = g_strdup("");
2018         namespace->separator = separator;
2019         folder->ns_personal = g_list_append(NULL, namespace);
2020 }
2021
2022 static IMAPNameSpace *imap_find_namespace_from_list(GList *ns_list,
2023                                                     const gchar *path)
2024 {
2025         IMAPNameSpace *namespace = NULL;
2026         gchar *tmp_path, *name;
2027
2028         if (!path) path = "";
2029
2030         Xstrcat_a(tmp_path, path, "/", return NULL);
2031
2032         for (; ns_list != NULL; ns_list = ns_list->next) {
2033                 IMAPNameSpace *tmp_ns = ns_list->data;
2034
2035                 Xstrdup_a(name, tmp_ns->name, return namespace);
2036                 if (tmp_ns->separator && tmp_ns->separator != '/')
2037                         subst_char(name, tmp_ns->separator, '/');
2038                 if (strncmp(tmp_path, name, strlen(name)) == 0)
2039                         namespace = tmp_ns;
2040         }
2041
2042         return namespace;
2043 }
2044
2045 static IMAPNameSpace *imap_find_namespace(IMAPFolder *folder,
2046                                           const gchar *path)
2047 {
2048         IMAPNameSpace *namespace;
2049
2050         g_return_val_if_fail(folder != NULL, NULL);
2051
2052         namespace = imap_find_namespace_from_list(folder->ns_personal, path);
2053         if (namespace) return namespace;
2054         namespace = imap_find_namespace_from_list(folder->ns_others, path);
2055         if (namespace) return namespace;
2056         namespace = imap_find_namespace_from_list(folder->ns_shared, path);
2057         if (namespace) return namespace;
2058
2059         return NULL;
2060 }
2061
2062 static gchar imap_get_path_separator(IMAPFolder *folder, const gchar *path)
2063 {
2064         IMAPNameSpace *namespace;
2065         gchar separator = '/';
2066
2067         namespace = imap_find_namespace(folder, path);
2068         if (namespace && namespace->separator)
2069                 separator = namespace->separator;
2070
2071         return separator;
2072 }
2073
2074 static gchar *imap_get_real_path(IMAPFolder *folder, const gchar *path)
2075 {
2076         gchar *real_path;
2077         gchar separator;
2078
2079         g_return_val_if_fail(folder != NULL, NULL);
2080         g_return_val_if_fail(path != NULL, NULL);
2081
2082         real_path = imap_locale_to_modified_utf7(path);
2083         separator = imap_get_path_separator(folder, path);
2084         imap_path_separator_subst(real_path, separator);
2085
2086         return real_path;
2087 }
2088
2089 static gchar *imap_parse_atom(SockInfo *sock, gchar *src,
2090                               gchar *dest, gint dest_len, GString *str)
2091 {
2092         gchar *cur_pos = src;
2093         gchar *nextline;
2094
2095         g_return_val_if_fail(str != NULL, cur_pos);
2096
2097         /* read the next line if the current response buffer is empty */
2098         while (isspace(*cur_pos)) cur_pos++;
2099         while (*cur_pos == '\0') {
2100                 if ((nextline = sock_getline(sock)) == NULL)
2101                         return cur_pos;
2102                 g_string_assign(str, nextline);
2103                 cur_pos = str->str;
2104                 strretchomp(nextline);
2105                 /* log_print("IMAP4< %s\n", nextline); */
2106                 debug_print("IMAP4< %s\n", nextline);
2107                 g_free(nextline);
2108
2109                 while (isspace(*cur_pos)) cur_pos++;
2110         }
2111
2112         if (!strncmp(cur_pos, "NIL", 3)) {
2113                 *dest = '\0';
2114                 cur_pos += 3;
2115         } else if (*cur_pos == '\"') {
2116                 gchar *p;
2117
2118                 p = get_quoted(cur_pos, '\"', dest, dest_len);
2119                 cur_pos = p ? p : cur_pos + 2;
2120         } else if (*cur_pos == '{') {
2121                 gchar buf[32];
2122                 gint len;
2123                 gint line_len = 0;
2124
2125                 cur_pos = strchr_cpy(cur_pos + 1, '}', buf, sizeof(buf));
2126                 len = atoi(buf);
2127                 g_return_val_if_fail(len > 0, cur_pos);
2128
2129                 g_string_truncate(str, 0);
2130                 cur_pos = str->str;
2131
2132                 do {
2133                         if ((nextline = sock_getline(sock)) == NULL)
2134                                 return cur_pos;
2135                         line_len += strlen(nextline);
2136                         g_string_append(str, nextline);
2137                         cur_pos = str->str;
2138                         strretchomp(nextline);
2139                         /* log_print("IMAP4< %s\n", nextline); */
2140                         debug_print("IMAP4< %s\n", nextline);
2141                         g_free(nextline);
2142                 } while (line_len < len);
2143
2144                 memcpy(dest, cur_pos, MIN(len, dest_len - 1));
2145                 dest[MIN(len, dest_len - 1)] = '\0';
2146                 cur_pos += len;
2147         }
2148
2149         return cur_pos;
2150 }
2151
2152 static gchar *imap_get_header(SockInfo *sock, gchar *cur_pos, gchar **headers,
2153                               GString *str)
2154 {
2155         gchar *nextline;
2156         gchar buf[32];
2157         gint len;
2158         gint block_len = 0;
2159
2160         *headers = NULL;
2161
2162         g_return_val_if_fail(str != NULL, cur_pos);
2163
2164         while (isspace(*cur_pos)) cur_pos++;
2165
2166         g_return_val_if_fail(*cur_pos == '{', cur_pos);
2167
2168         cur_pos = strchr_cpy(cur_pos + 1, '}', buf, sizeof(buf));
2169         len = atoi(buf);
2170         g_return_val_if_fail(len > 0, cur_pos);
2171
2172         g_string_truncate(str, 0);
2173         cur_pos = str->str;
2174
2175         do {
2176                 if ((nextline = sock_getline(sock)) == NULL)
2177                         return cur_pos;
2178                 block_len += strlen(nextline);
2179                 g_string_append(str, nextline);
2180                 cur_pos = str->str;
2181                 strretchomp(nextline);
2182                 /* debug_print("IMAP4< %s\n", nextline); */
2183                 g_free(nextline);
2184         } while (block_len < len);
2185
2186         debug_print("IMAP4< [contents of BODY.PEEK[HEADER.FIELDS (...)]]\n");
2187
2188         *headers = g_strndup(cur_pos, len);
2189         cur_pos += len;
2190
2191         while (isspace(*cur_pos)) cur_pos++;
2192         while (*cur_pos == '\0') {
2193                 if ((nextline = sock_getline(sock)) == NULL)
2194                         return cur_pos;
2195                 g_string_assign(str, nextline);
2196                 cur_pos = str->str;
2197                 strretchomp(nextline);
2198                 debug_print("IMAP4< %s\n", nextline);
2199                 g_free(nextline);
2200
2201                 while (isspace(*cur_pos)) cur_pos++;
2202         }
2203
2204         return cur_pos;
2205 }
2206
2207 static MsgFlags imap_parse_flags(const gchar *flag_str)  
2208 {
2209         const gchar *p = flag_str;
2210         MsgFlags flags = {0, 0};
2211
2212         flags.perm_flags = MSG_UNREAD;
2213
2214         while ((p = strchr(p, '\\')) != NULL) {
2215                 p++;
2216
2217                 if (g_strncasecmp(p, "Recent", 6) == 0 && MSG_IS_UNREAD(flags)) {
2218                         MSG_SET_PERM_FLAGS(flags, MSG_NEW);
2219                 } else if (g_strncasecmp(p, "Seen", 4) == 0) {
2220                         MSG_UNSET_PERM_FLAGS(flags, MSG_NEW|MSG_UNREAD);
2221                 } else if (g_strncasecmp(p, "Deleted", 7) == 0) {
2222                         MSG_SET_PERM_FLAGS(flags, MSG_DELETED);
2223                 } else if (g_strncasecmp(p, "Flagged", 7) == 0) {
2224                         MSG_SET_PERM_FLAGS(flags, MSG_MARKED);
2225                 } else if (g_strncasecmp(p, "Answered", 8) == 0) {
2226                         MSG_SET_PERM_FLAGS(flags, MSG_REPLIED);
2227                 }
2228         }
2229
2230         return flags;
2231 }
2232
2233 static MsgInfo *imap_parse_envelope(SockInfo *sock, FolderItem *item,
2234                                     GString *line_str)
2235 {
2236         gchar buf[IMAPBUFSIZE];
2237         MsgInfo *msginfo = NULL;
2238         gchar *cur_pos;
2239         gint msgnum;
2240         guint32 uid = 0;
2241         size_t size = 0;
2242         MsgFlags flags = {0, 0}, imap_flags = {0, 0};
2243
2244         g_return_val_if_fail(line_str != NULL, NULL);
2245         g_return_val_if_fail(line_str->str[0] == '*' &&
2246                              line_str->str[1] == ' ', NULL);
2247
2248         MSG_SET_TMP_FLAGS(flags, MSG_IMAP);
2249         if (item->stype == F_QUEUE) {
2250                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
2251         } else if (item->stype == F_DRAFT) {
2252                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
2253         }
2254
2255         cur_pos = line_str->str + 2;
2256
2257 #define PARSE_ONE_ELEMENT(ch)                                   \
2258 {                                                               \
2259         cur_pos = strchr_cpy(cur_pos, ch, buf, sizeof(buf));    \
2260         if (cur_pos == NULL) {                                  \
2261                 g_warning("cur_pos == NULL\n");                 \
2262                 procmsg_msginfo_free(msginfo);                  \
2263                 return NULL;                                    \
2264         }                                                       \
2265 }
2266
2267         PARSE_ONE_ELEMENT(' ');
2268         msgnum = atoi(buf);
2269
2270         PARSE_ONE_ELEMENT(' ');
2271         g_return_val_if_fail(!strcmp(buf, "FETCH"), NULL);
2272
2273         g_return_val_if_fail(*cur_pos == '(', NULL);
2274         cur_pos++;
2275
2276         while (*cur_pos != '\0' && *cur_pos != ')') {
2277                 while (*cur_pos == ' ') cur_pos++;
2278
2279                 if (!strncmp(cur_pos, "UID ", 4)) {
2280                         cur_pos += 4;
2281                         uid = strtoul(cur_pos, &cur_pos, 10);
2282                 } else if (!strncmp(cur_pos, "FLAGS ", 6)) {
2283                         cur_pos += 6;
2284                         if (*cur_pos != '(') {
2285                                 g_warning("*cur_pos != '('\n");
2286                                 procmsg_msginfo_free(msginfo);
2287                                 return NULL;
2288                         }
2289                         cur_pos++;
2290                         PARSE_ONE_ELEMENT(')');
2291                         imap_flags = imap_parse_flags(buf);
2292                 } else if (!strncmp(cur_pos, "RFC822.SIZE ", 12)) {
2293                         cur_pos += 12;
2294                         size = strtol(cur_pos, &cur_pos, 10);
2295                 } else if (!strncmp(cur_pos, "BODY[HEADER.FIELDS ", 19)) {
2296                         gchar *headers;
2297
2298                         cur_pos += 19;
2299                         if (*cur_pos != '(') {
2300                                 g_warning("*cur_pos != '('\n");
2301                                 procmsg_msginfo_free(msginfo);
2302                                 return NULL;
2303                         }
2304                         cur_pos++;
2305                         PARSE_ONE_ELEMENT(')');
2306                         if (*cur_pos != ']') {
2307                                 g_warning("*cur_pos != ']'\n");
2308                                 procmsg_msginfo_free(msginfo);
2309                                 return NULL;
2310                         }
2311                         cur_pos++;
2312
2313                         cur_pos = imap_get_header(sock, cur_pos, &headers,
2314                                                   line_str);
2315                         msginfo = procheader_parse_str(headers, flags, FALSE, FALSE);
2316                         g_free(headers);
2317                 } else {
2318                         g_warning("invalid FETCH response: %s\n", cur_pos);
2319                         break;
2320                 }
2321         }
2322
2323         if (msginfo) {
2324                 msginfo->msgnum = uid;
2325                 msginfo->size = size;
2326                 msginfo->flags.tmp_flags |= imap_flags.tmp_flags;
2327                 msginfo->flags.perm_flags = imap_flags.perm_flags;
2328         }
2329
2330         return msginfo;
2331 }
2332
2333 static gchar *imap_get_flag_str(IMAPFlags flags)
2334 {
2335         GString *str;
2336         gchar *ret;
2337
2338         str = g_string_new(NULL);
2339
2340         if (IMAP_IS_SEEN(flags))        g_string_append(str, "\\Seen ");
2341         if (IMAP_IS_ANSWERED(flags))    g_string_append(str, "\\Answered ");
2342         if (IMAP_IS_FLAGGED(flags))     g_string_append(str, "\\Flagged ");
2343         if (IMAP_IS_DELETED(flags))     g_string_append(str, "\\Deleted ");
2344         if (IMAP_IS_DRAFT(flags))       g_string_append(str, "\\Draft");
2345
2346         if (str->len > 0 && str->str[str->len - 1] == ' ')
2347                 g_string_truncate(str, str->len - 1);
2348
2349         ret = str->str;
2350         g_string_free(str, FALSE);
2351
2352         return ret;
2353 }
2354
2355 static gint imap_set_message_flags(IMAPSession *session,
2356                                    MsgNumberList *numlist,
2357                                    IMAPFlags flags,
2358                                    gboolean is_set)
2359 {
2360         gchar *cmd;
2361         gchar *flag_str;
2362         gint ok;
2363         GSList *seq_list, *cur;
2364         IMAPSet imapset;
2365
2366         flag_str = imap_get_flag_str(flags);
2367         cmd = g_strconcat(is_set ? "+FLAGS.SILENT (" : "-FLAGS.SILENT (",
2368                           flag_str, ")", NULL);
2369         g_free(flag_str);
2370
2371         seq_list = imap_get_seq_set_from_numlist(numlist);
2372         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
2373                 imapset = cur->data;
2374
2375                 ok = imap_cmd_store(session, imapset, cmd);
2376         }
2377         imap_seq_set_free(seq_list);
2378         g_free(cmd);
2379
2380         return ok;
2381 }
2382
2383 static gint imap_select(IMAPSession *session, IMAPFolder *folder,
2384                         const gchar *path,
2385                         gint *exists, gint *recent, gint *unseen,
2386                         guint32 *uid_validity)
2387 {
2388         gchar *real_path;
2389         gint ok;
2390         gint exists_, recent_, unseen_, uid_validity_;
2391
2392         if (!exists || !recent || !unseen || !uid_validity) {
2393                 if (session->mbox && strcmp(session->mbox, path) == 0)
2394                         return IMAP_SUCCESS;
2395                 exists = &exists_;
2396                 recent = &recent_;
2397                 unseen = &unseen_;
2398                 uid_validity = &uid_validity_;
2399         }
2400
2401         g_free(session->mbox);
2402         session->mbox = NULL;
2403
2404         real_path = imap_get_real_path(folder, path);
2405         ok = imap_cmd_select(session, real_path,
2406                              exists, recent, unseen, uid_validity);
2407         if (ok != IMAP_SUCCESS)
2408                 log_warning(_("can't select folder: %s\n"), real_path);
2409         else {
2410                 session->mbox = g_strdup(path);
2411                 session->folder_content_changed = FALSE;
2412         }
2413         g_free(real_path);
2414
2415         return ok;
2416 }
2417
2418 #define THROW(err) { ok = err; goto catch; }
2419
2420 static gint imap_status(IMAPSession *session, IMAPFolder *folder,
2421                         const gchar *path,
2422                         gint *messages, gint *recent,
2423                         guint32 *uid_next, guint32 *uid_validity,
2424                         gint *unseen)
2425 {
2426         gchar *real_path;
2427         gchar *real_path_;
2428         gint ok;
2429         GPtrArray *argbuf;
2430         gchar *str;
2431
2432         *messages = *recent = *uid_next = *uid_validity = *unseen = 0;
2433
2434         if (path == NULL)
2435                 return -1;
2436
2437         argbuf = g_ptr_array_new();
2438
2439         real_path = imap_get_real_path(folder, path);
2440         QUOTE_IF_REQUIRED(real_path_, real_path);
2441         imap_gen_send(session, "STATUS %s "
2442                       "(MESSAGES RECENT UIDNEXT UIDVALIDITY UNSEEN)",
2443                       real_path_);
2444
2445         ok = imap_cmd_ok(session, argbuf);
2446         if (ok != IMAP_SUCCESS) THROW(ok);
2447
2448         str = search_array_str(argbuf, "STATUS");
2449         if (!str) THROW(IMAP_ERROR);
2450
2451         str = strchr(str, '(');
2452         if (!str) THROW(IMAP_ERROR);
2453         str++;
2454         while (*str != '\0' && *str != ')') {
2455                 while (*str == ' ') str++;
2456
2457                 if (!strncmp(str, "MESSAGES ", 9)) {
2458                         str += 9;
2459                         *messages = strtol(str, &str, 10);
2460                 } else if (!strncmp(str, "RECENT ", 7)) {
2461                         str += 7;
2462                         *recent = strtol(str, &str, 10);
2463                 } else if (!strncmp(str, "UIDNEXT ", 8)) {
2464                         str += 8;
2465                         *uid_next = strtoul(str, &str, 10);
2466                 } else if (!strncmp(str, "UIDVALIDITY ", 12)) {
2467                         str += 12;
2468                         *uid_validity = strtoul(str, &str, 10);
2469                 } else if (!strncmp(str, "UNSEEN ", 7)) {
2470                         str += 7;
2471                         *unseen = strtol(str, &str, 10);
2472                 } else {
2473                         g_warning("invalid STATUS response: %s\n", str);
2474                         break;
2475                 }
2476         }
2477
2478 catch:
2479         g_free(real_path);
2480         ptr_array_free_strings(argbuf);
2481         g_ptr_array_free(argbuf, TRUE);
2482
2483         return ok;
2484 }
2485
2486 #undef THROW
2487
2488 static gboolean imap_has_capability(IMAPSession *session, const gchar *cap)
2489 {
2490         gchar **p;
2491         
2492         for (p = session->capability; *p != NULL; ++p) {
2493                 if (!g_strcasecmp(*p, cap))
2494                         return TRUE;
2495         }
2496
2497         return FALSE;
2498 }
2499
2500 void imap_free_capabilities(IMAPSession *session)
2501 {
2502         g_strfreev(session->capability);
2503         session->capability = NULL;
2504 }
2505
2506 /* low-level IMAP4rev1 commands */
2507
2508 static gint imap_cmd_authenticate(IMAPSession *session, const gchar *user,
2509                                   const gchar *pass, IMAPAuthType type)
2510 {
2511         gchar *auth_type;
2512         gint ok;
2513         gchar *buf = NULL;
2514         gchar *challenge;
2515         gint challenge_len;
2516         gchar hexdigest[33];
2517         gchar *response;
2518         gchar *response64;
2519
2520         auth_type = "CRAM-MD5";
2521
2522         imap_gen_send(session, "AUTHENTICATE %s", auth_type);
2523         ok = imap_gen_recv(session, &buf);
2524         if (ok != IMAP_SUCCESS || buf[0] != '+' || buf[1] != ' ') {
2525                 g_free(buf);
2526                 return IMAP_ERROR;
2527         }
2528
2529         challenge = g_malloc(strlen(buf + 2) + 1);
2530         challenge_len = base64_decode(challenge, buf + 2, -1);
2531         challenge[challenge_len] = '\0';
2532         g_free(buf);
2533         log_print("IMAP< [Decoded: %s]\n", challenge);
2534
2535         md5_hex_hmac(hexdigest, challenge, challenge_len, pass, strlen(pass));
2536         g_free(challenge);
2537
2538         response = g_strdup_printf("%s %s", user, hexdigest);
2539         log_print("IMAP> [Encoded: %s]\n", response);
2540         response64 = g_malloc((strlen(response) + 3) * 2 + 1);
2541         base64_encode(response64, response, strlen(response));
2542         g_free(response);
2543
2544         log_print("IMAP> %s\n", response64);
2545         sock_puts(SESSION(session)->sock, response64);
2546         ok = imap_cmd_ok(session, NULL);
2547         if (ok != IMAP_SUCCESS)
2548                 log_warning(_("IMAP4 authentication failed.\n"));
2549
2550         return ok;
2551 }
2552
2553 static gint imap_cmd_login(IMAPSession *session,
2554                            const gchar *user, const gchar *pass)
2555 {
2556         gchar *user_, *pass_;
2557         gint ok;
2558
2559         QUOTE_IF_REQUIRED(user_, user);
2560         QUOTE_IF_REQUIRED(pass_, pass);
2561         imap_gen_send(session, "LOGIN %s %s", user_, pass_);
2562
2563         ok = imap_cmd_ok(session, NULL);
2564         if (ok != IMAP_SUCCESS)
2565                 log_warning(_("IMAP4 login failed.\n"));
2566
2567         return ok;
2568 }
2569
2570 static gint imap_cmd_logout(IMAPSession *session)
2571 {
2572         imap_gen_send(session, "LOGOUT");
2573         return imap_cmd_ok(session, NULL);
2574 }
2575
2576 static gint imap_cmd_noop(IMAPSession *session)
2577 {
2578         imap_gen_send(session, "NOOP");
2579         return imap_cmd_ok(session, NULL);
2580 }
2581
2582 static gint imap_cmd_starttls(IMAPSession *session)
2583 {
2584         imap_gen_send(session, "STARTTLS");
2585         return imap_cmd_ok(session, NULL);
2586 }
2587
2588 #define THROW(err) { ok = err; goto catch; }
2589
2590 static gint imap_cmd_namespace(IMAPSession *session, gchar **ns_str)
2591 {
2592         gint ok;
2593         GPtrArray *argbuf;
2594         gchar *str;
2595
2596         argbuf = g_ptr_array_new();
2597
2598         imap_gen_send(session, "NAMESPACE");
2599         if ((ok = imap_cmd_ok(session, argbuf)) != IMAP_SUCCESS) THROW(ok);
2600
2601         str = search_array_str(argbuf, "NAMESPACE");
2602         if (!str) THROW(IMAP_ERROR);
2603
2604         *ns_str = g_strdup(str);
2605
2606 catch:
2607         ptr_array_free_strings(argbuf);
2608         g_ptr_array_free(argbuf, TRUE);
2609
2610         return ok;
2611 }
2612
2613 #undef THROW
2614
2615 static gint imap_cmd_list(IMAPSession *session, const gchar *ref,
2616                           const gchar *mailbox, GPtrArray *argbuf)
2617 {
2618         gchar *ref_, *mailbox_;
2619
2620         if (!ref) ref = "\"\"";
2621         if (!mailbox) mailbox = "\"\"";
2622
2623         QUOTE_IF_REQUIRED(ref_, ref);
2624         QUOTE_IF_REQUIRED(mailbox_, mailbox);
2625         imap_gen_send(session, "LIST %s %s", ref_, mailbox_);
2626
2627         return imap_cmd_ok(session, argbuf);
2628 }
2629
2630 #define THROW goto catch
2631
2632 static gint imap_cmd_do_select(IMAPSession *session, const gchar *folder,
2633                                gboolean examine,
2634                                gint *exists, gint *recent, gint *unseen,
2635                                guint32 *uid_validity)
2636 {
2637         gint ok;
2638         gchar *resp_str;
2639         GPtrArray *argbuf;
2640         gchar *select_cmd;
2641         gchar *folder_;
2642
2643         *exists = *recent = *unseen = *uid_validity = 0;
2644         argbuf = g_ptr_array_new();
2645
2646         if (examine)
2647                 select_cmd = "EXAMINE";
2648         else
2649                 select_cmd = "SELECT";
2650
2651         QUOTE_IF_REQUIRED(folder_, folder);
2652         imap_gen_send(session, "%s %s", select_cmd, folder_);
2653
2654         if ((ok = imap_cmd_ok(session, argbuf)) != IMAP_SUCCESS) THROW;
2655
2656         resp_str = search_array_contain_str(argbuf, "EXISTS");
2657         if (resp_str) {
2658                 if (sscanf(resp_str,"%d EXISTS", exists) != 1) {
2659                         g_warning("imap_cmd_select(): invalid EXISTS line.\n");
2660                         THROW;
2661                 }
2662         }
2663
2664         resp_str = search_array_contain_str(argbuf, "RECENT");
2665         if (resp_str) {
2666                 if (sscanf(resp_str, "%d RECENT", recent) != 1) {
2667                         g_warning("imap_cmd_select(): invalid RECENT line.\n");
2668                         THROW;
2669                 }
2670         }
2671
2672         resp_str = search_array_contain_str(argbuf, "UIDVALIDITY");
2673         if (resp_str) {
2674                 if (sscanf(resp_str, "OK [UIDVALIDITY %u] ", uid_validity)
2675                     != 1) {
2676                         g_warning("imap_cmd_select(): invalid UIDVALIDITY line.\n");
2677                         THROW;
2678                 }
2679         }
2680
2681         resp_str = search_array_contain_str(argbuf, "UNSEEN");
2682         if (resp_str) {
2683                 if (sscanf(resp_str, "OK [UNSEEN %d] ", unseen) != 1) {
2684                         g_warning("imap_cmd_select(): invalid UNSEEN line.\n");
2685                         THROW;
2686                 }
2687         }
2688
2689 catch:
2690         ptr_array_free_strings(argbuf);
2691         g_ptr_array_free(argbuf, TRUE);
2692
2693         return ok;
2694 }
2695
2696 static gint imap_cmd_select(IMAPSession *session, const gchar *folder,
2697                             gint *exists, gint *recent, gint *unseen,
2698                             guint32 *uid_validity)
2699 {
2700         return imap_cmd_do_select(session, folder, FALSE,
2701                                   exists, recent, unseen, uid_validity);
2702 }
2703
2704 static gint imap_cmd_examine(IMAPSession *session, const gchar *folder,
2705                              gint *exists, gint *recent, gint *unseen,
2706                              guint32 *uid_validity)
2707 {
2708         return imap_cmd_do_select(session, folder, TRUE,
2709                                   exists, recent, unseen, uid_validity);
2710 }
2711
2712 #undef THROW
2713
2714 static gint imap_cmd_create(IMAPSession *session, const gchar *folder)
2715 {
2716         gchar *folder_;
2717
2718         QUOTE_IF_REQUIRED(folder_, folder);
2719         imap_gen_send(session, "CREATE %s", folder_);
2720
2721         return imap_cmd_ok(session, NULL);
2722 }
2723
2724 static gint imap_cmd_rename(IMAPSession *session, const gchar *old_folder,
2725                             const gchar *new_folder)
2726 {
2727         gchar *old_folder_, *new_folder_;
2728
2729         QUOTE_IF_REQUIRED(old_folder_, old_folder);
2730         QUOTE_IF_REQUIRED(new_folder_, new_folder);
2731         imap_gen_send(session, "RENAME %s %s", old_folder_, new_folder_);
2732
2733         return imap_cmd_ok(session, NULL);
2734 }
2735
2736 static gint imap_cmd_delete(IMAPSession *session, const gchar *folder)
2737 {
2738         gchar *folder_;
2739
2740         QUOTE_IF_REQUIRED(folder_, folder);
2741         imap_gen_send(session, "DELETE %s", folder_);
2742
2743         return imap_cmd_ok(session, NULL);
2744 }
2745
2746 static gint imap_cmd_search(IMAPSession *session, const gchar *criteria, GSList **list)
2747 {
2748         gint ok;
2749         gchar *uidlist;
2750         GPtrArray *argbuf;
2751
2752         g_return_val_if_fail(criteria != NULL, IMAP_ERROR);
2753         g_return_val_if_fail(list != NULL, IMAP_ERROR);
2754
2755         *list = NULL;
2756         
2757         argbuf = g_ptr_array_new();
2758         imap_gen_send(session, "UID SEARCH %s", criteria);
2759
2760         ok = imap_cmd_ok(session, argbuf);
2761         if (ok != IMAP_SUCCESS) {
2762                 ptr_array_free_strings(argbuf);
2763                 g_ptr_array_free(argbuf, TRUE);
2764                 return ok;
2765         }
2766
2767         if ((uidlist = search_array_str(argbuf, "SEARCH ")) != NULL) {
2768                 gchar **strlist, **p;
2769
2770                 strlist = g_strsplit(uidlist + 7, " ", 0);
2771                 for (p = strlist; *p != NULL; ++p) {
2772                         guint msgnum;
2773
2774                         if (sscanf(*p, "%d", &msgnum) == 1)
2775                                 *list = g_slist_append(*list, GINT_TO_POINTER(msgnum));
2776                 }
2777                 g_strfreev(strlist);
2778         }
2779         ptr_array_free_strings(argbuf);
2780         g_ptr_array_free(argbuf, TRUE);
2781
2782         return IMAP_SUCCESS;
2783 }
2784
2785 static gint imap_cmd_fetch(IMAPSession *session, guint32 uid, const gchar *filename)
2786 {
2787         gint ok;
2788         gchar *buf = NULL;
2789         gchar *cur_pos;
2790         gchar size_str[32];
2791         glong size_num;
2792
2793         g_return_val_if_fail(filename != NULL, IMAP_ERROR);
2794
2795         imap_gen_send(session, "UID FETCH %d BODY.PEEK[]", uid);
2796
2797         while ((ok = imap_gen_recv(session, &buf)) == IMAP_SUCCESS) {
2798                 if (buf[0] != '*' || buf[1] != ' ') {
2799                         g_free(buf);
2800                         return IMAP_ERROR;
2801                 }
2802                 if (strstr(buf, "FETCH") != NULL) break;
2803                 g_free(buf);
2804         }
2805         if (ok != IMAP_SUCCESS) {
2806                 g_free(buf);
2807                 return ok;
2808         }
2809
2810 #define RETURN_ERROR_IF_FAIL(cond)      \
2811         if (!(cond)) {                  \
2812                 g_free(buf);            \
2813                 return IMAP_ERROR;      \
2814         }
2815
2816         cur_pos = strchr(buf, '{');
2817         RETURN_ERROR_IF_FAIL(cur_pos != NULL);
2818         cur_pos = strchr_cpy(cur_pos + 1, '}', size_str, sizeof(size_str));
2819         RETURN_ERROR_IF_FAIL(cur_pos != NULL);
2820         size_num = atol(size_str);
2821         RETURN_ERROR_IF_FAIL(size_num > 0);
2822
2823         RETURN_ERROR_IF_FAIL(*cur_pos == '\0');
2824
2825 #undef RETURN_ERROR_IF_FAIL
2826
2827         g_free(buf);
2828
2829         if (recv_bytes_write_to_file(SESSION(session)->sock, size_num, filename) != 0)
2830                 return IMAP_ERROR;
2831
2832         if (imap_gen_recv(session, &buf) != IMAP_SUCCESS) {
2833                 g_free(buf);
2834                 return IMAP_ERROR;
2835         }
2836
2837         if (buf[0] == '\0' || buf[strlen(buf) - 1] != ')') {
2838                 g_free(buf);
2839                 return IMAP_ERROR;
2840         }
2841         g_free(buf);
2842
2843         ok = imap_cmd_ok(session, NULL);
2844
2845         return ok;
2846 }
2847
2848 static gint imap_cmd_append(IMAPSession *session, const gchar *destfolder,
2849                             const gchar *file, IMAPFlags flags, guint32 *new_uid)
2850 {
2851         gint ok;
2852         gint size;
2853         gchar *destfolder_;
2854         gchar *flag_str;
2855         guint32 new_uid_;
2856         gchar *ret = NULL;
2857         gchar buf[BUFFSIZE];
2858         FILE *fp;
2859         GPtrArray *argbuf;
2860         gchar *resp_str;
2861
2862         g_return_val_if_fail(file != NULL, IMAP_ERROR);
2863
2864         size = get_file_size_as_crlf(file);
2865         if ((fp = fopen(file, "rb")) == NULL) {
2866                 FILE_OP_ERROR(file, "fopen");
2867                 return -1;
2868         }
2869         QUOTE_IF_REQUIRED(destfolder_, destfolder);
2870         flag_str = imap_get_flag_str(flags);
2871         imap_gen_send(session, "APPEND %s (%s) {%d}", 
2872                       destfolder_, flag_str, size);
2873         g_free(flag_str);
2874
2875         ok = imap_gen_recv(session, &ret);
2876         if (ok != IMAP_SUCCESS || ret[0] != '+' || ret[1] != ' ') {
2877                 log_warning(_("can't append %s to %s\n"), file, destfolder_);
2878                 g_free(ret);
2879                 fclose(fp);
2880                 return IMAP_ERROR;
2881         }
2882         g_free(ret);
2883
2884         log_print("IMAP4> %s\n", _("(sending file...)"));
2885
2886         while (fgets(buf, sizeof(buf), fp) != NULL) {
2887                 strretchomp(buf);
2888                 if (sock_puts(SESSION(session)->sock, buf) < 0) {
2889                         fclose(fp);
2890                         return -1;
2891                 }
2892         }
2893
2894         if (ferror(fp)) {
2895                 FILE_OP_ERROR(file, "fgets");
2896                 fclose(fp);
2897                 return -1;
2898         }
2899
2900         sock_puts(SESSION(session)->sock, "");
2901
2902         fclose(fp);
2903
2904         if (new_uid != NULL)
2905                 *new_uid = 0;
2906
2907         if (new_uid != NULL && session->uidplus) {
2908                 argbuf = g_ptr_array_new();
2909
2910                 ok = imap_cmd_ok(session, argbuf);
2911                 if (ok != IMAP_SUCCESS)
2912                         log_warning(_("can't append message to %s\n"),
2913                                     destfolder_);
2914                 else if (argbuf->len > 0) {
2915                         resp_str = g_ptr_array_index(argbuf, argbuf->len - 1);
2916                         if (resp_str &&
2917                             sscanf(resp_str, "%*u OK [APPENDUID %*u %u]",
2918                                    &new_uid_) == 1) {
2919                                 *new_uid = new_uid_;
2920                         }
2921                 }
2922
2923                 ptr_array_free_strings(argbuf);
2924                 g_ptr_array_free(argbuf, TRUE);
2925         } else
2926                 ok = imap_cmd_ok(session, NULL);
2927
2928         return ok;
2929 }
2930
2931 static gint imap_cmd_copy(IMAPSession *session, const gchar *seq_set,
2932                           const gchar *destfolder, GRelation *uid_mapping)
2933 {
2934         gint ok;
2935         gchar *destfolder_;
2936         GPtrArray *reply;
2937         
2938         g_return_val_if_fail(session != NULL, IMAP_ERROR);
2939         g_return_val_if_fail(seq_set != NULL, IMAP_ERROR);
2940         g_return_val_if_fail(destfolder != NULL, IMAP_ERROR);
2941
2942         QUOTE_IF_REQUIRED(destfolder_, destfolder);
2943         imap_gen_send(session, "UID COPY %s %s", seq_set, destfolder_);
2944
2945         reply = g_ptr_array_new();
2946
2947         ok = imap_cmd_ok(session, reply);
2948         if (ok != IMAP_SUCCESS)
2949                 log_warning(_("can't copy %s to %s\n"), seq_set, destfolder_);
2950 /*
2951         TODO: UIDPLUS
2952         
2953         - split IMAPSets into uids
2954         - g_relation_insert(uid_mapping, olduid, newuid);
2955
2956         else if (imap_has_capability(session, "UIDPLUS") && reply->len > 0)
2957                 if ((okmsginfo = g_ptr_array_index(reply, reply->len - 1)) != NULL &&
2958                     sscanf(okmsginfo, "%*u OK [COPYUID %*u %u %u]", &olduid, &newuid) == 2 &&
2959                     olduid == msgnum)
2960                         *new_uid = newuid;
2961 */
2962         ptr_array_free_strings(reply);
2963         g_ptr_array_free(reply, TRUE);
2964         return ok;
2965 }
2966
2967 gint imap_cmd_envelope(IMAPSession *session, IMAPSet set)
2968 {
2969         static GString *header_fields = NULL;
2970
2971         if (header_fields == NULL) {
2972                 const HeaderEntry *headers, *elem;
2973
2974                 headers = procheader_get_headernames(FALSE);
2975                 header_fields = g_string_new("");
2976
2977                 for (elem = headers; elem->name != NULL; ++elem) {
2978                         gint namelen = strlen(elem->name);
2979
2980                         /* Header fields ending with space are not rfc822 headers */
2981                         if (elem->name[namelen - 1] == ' ')
2982                                 continue;
2983
2984                         /* strip : at the of header field */
2985                         if(elem->name[namelen - 1] == ':')
2986                                 namelen--;
2987                         
2988                         if (namelen <= 0)
2989                                 continue;
2990
2991                         g_string_sprintfa(header_fields, "%s%.*s",
2992                                         header_fields->str[0] != '\0' ? " " : "",
2993                                         namelen, elem->name);
2994                 }
2995         }
2996
2997         imap_gen_send
2998                 (session, "UID FETCH %s (UID FLAGS RFC822.SIZE BODY.PEEK[HEADER.FIELDS (%s)])",
2999                  set, header_fields->str);
3000
3001         return IMAP_SUCCESS;
3002 }
3003
3004 static gint imap_cmd_store(IMAPSession *session, IMAPSet seq_set,
3005                            gchar *sub_cmd)
3006 {
3007         gint ok;
3008
3009         imap_gen_send(session, "UID STORE %s %s", seq_set, sub_cmd);
3010
3011         if ((ok = imap_cmd_ok(session, NULL)) != IMAP_SUCCESS) {
3012                 log_warning(_("error while imap command: STORE %s %s\n"),
3013                             seq_set, sub_cmd);
3014                 return ok;
3015         }
3016
3017         return IMAP_SUCCESS;
3018 }
3019
3020 static gint imap_cmd_expunge(IMAPSession *session)
3021 {
3022         gint ok;
3023
3024         imap_gen_send(session, "EXPUNGE");
3025         if ((ok = imap_cmd_ok(session, NULL)) != IMAP_SUCCESS) {
3026                 log_warning(_("error while imap command: EXPUNGE\n"));
3027                 return ok;
3028         }
3029
3030         return IMAP_SUCCESS;
3031 }
3032
3033 static gint imap_cmd_close(IMAPSession *session)
3034 {
3035         gint ok;
3036
3037         imap_gen_send(session, "CLOSE");
3038         if ((ok = imap_cmd_ok(session, NULL)) != IMAP_SUCCESS)
3039                 log_warning(_("error while imap command: CLOSE\n"));
3040
3041         return ok;
3042 }
3043
3044 static gint imap_cmd_ok(IMAPSession *session, GPtrArray *argbuf)
3045 {
3046         gint ok = IMAP_SUCCESS;
3047         gchar *buf;
3048         gint cmd_num;
3049         gchar *data;
3050
3051         while ((ok = imap_gen_recv(session, &buf))
3052                == IMAP_SUCCESS) {
3053                 // make sure data is long enough for any substring of buf
3054                 data = alloca(strlen(buf) + 1);
3055
3056                 // untagged line read
3057                 if (buf[0] == '*' && buf[1] == ' ') {
3058                         gint num;
3059                         if (argbuf)
3060                                 g_ptr_array_add(argbuf, g_strdup(buf + 2));
3061
3062                         if (sscanf(buf + 2, "%d %s", &num, data) >= 2) {
3063                                 if (!strcmp(data, "EXISTS")) {
3064                                         session->exists = num;
3065                                         session->folder_content_changed = TRUE;
3066                                 }
3067
3068                                 if(!strcmp(data, "EXPUNGE")) {
3069                                         session->exists--;
3070                                         session->folder_content_changed = TRUE;
3071                                 }
3072                         }
3073                 // tagged line with correct tag and OK response found
3074                 } else if ((sscanf(buf, "%d %s", &cmd_num, data) >= 2) &&
3075                            (cmd_num == session->cmd_count) &&
3076                            !strcmp(data, "OK")) {
3077                         if (argbuf)
3078                                 g_ptr_array_add(argbuf, g_strdup(buf));
3079                         break;
3080                 // everything else
3081                 } else {
3082                         ok = IMAP_ERROR;
3083                         break;
3084                 }
3085                 g_free(buf);
3086         }
3087         g_free(buf);
3088
3089         return ok;
3090 }
3091
3092 static void imap_gen_send(IMAPSession *session, const gchar *format, ...)
3093 {
3094         gchar *buf;
3095         gchar *tmp;
3096         gchar *p;
3097         va_list args;
3098
3099         va_start(args, format);
3100         tmp = g_strdup_vprintf(format, args);
3101         va_end(args);
3102
3103         session->cmd_count++;
3104
3105         buf = g_strdup_printf("%d %s\r\n", session->cmd_count, tmp);
3106         if (!strncasecmp(tmp, "LOGIN ", 6) && (p = strchr(tmp + 6, ' '))) {
3107                 *p = '\0';
3108                 log_print("IMAP4> %d %s ********\n", session->cmd_count, tmp);
3109         } else
3110                 log_print("IMAP4> %d %s\n", session->cmd_count, tmp);
3111
3112         sock_write_all(SESSION(session)->sock, buf, strlen(buf));
3113         g_free(tmp);
3114         g_free(buf);
3115 }
3116
3117 static gint imap_gen_recv(IMAPSession *session, gchar **ret)
3118 {
3119         if ((*ret = sock_getline(SESSION(session)->sock)) == NULL)
3120                 return IMAP_SOCKET;
3121
3122         strretchomp(*ret);
3123
3124         log_print("IMAP4< %s\n", *ret);
3125
3126         return IMAP_SUCCESS;
3127 }
3128
3129
3130 /* misc utility functions */
3131
3132 static gchar *strchr_cpy(const gchar *src, gchar ch, gchar *dest, gint len)
3133 {
3134         gchar *tmp;
3135
3136         dest[0] = '\0';
3137         tmp = strchr(src, ch);
3138         if (!tmp)
3139                 return NULL;
3140
3141         memcpy(dest, src, MIN(tmp - src, len - 1));
3142         dest[MIN(tmp - src, len - 1)] = '\0';
3143
3144         return tmp + 1;
3145 }
3146
3147 static gchar *get_quoted(const gchar *src, gchar ch, gchar *dest, gint len)
3148 {
3149         const gchar *p = src;
3150         gint n = 0;
3151
3152         g_return_val_if_fail(*p == ch, NULL);
3153
3154         *dest = '\0';
3155         p++;
3156
3157         while (*p != '\0' && *p != ch) {
3158                 if (n < len - 1) {
3159                         if (*p == '\\' && *(p + 1) != '\0')
3160                                 p++;
3161                         *dest++ = *p++;
3162                 } else
3163                         p++;
3164                 n++;
3165         }
3166
3167         *dest = '\0';
3168         return (gchar *)(*p == ch ? p + 1 : p);
3169 }
3170
3171 static gchar *search_array_contain_str(GPtrArray *array, const gchar *str)
3172 {
3173         gint i;
3174
3175         for (i = 0; i < array->len; i++) {
3176                 gchar *tmp;
3177
3178                 tmp = g_ptr_array_index(array, i);
3179                 if (strstr(tmp, str) != NULL)
3180                         return tmp;
3181         }
3182
3183         return NULL;
3184 }
3185
3186 static gchar *search_array_str(GPtrArray *array, const gchar *str)
3187 {
3188         gint i;
3189         gint len;
3190
3191         len = strlen(str);
3192
3193         for (i = 0; i < array->len; i++) {
3194                 gchar *tmp;
3195
3196                 tmp = g_ptr_array_index(array, i);
3197                 if (!strncmp(tmp, str, len))
3198                         return tmp;
3199         }
3200
3201         return NULL;
3202 }
3203
3204 static void imap_path_separator_subst(gchar *str, gchar separator)
3205 {
3206         gchar *p;
3207         gboolean in_escape = FALSE;
3208
3209         if (!separator || separator == '/') return;
3210
3211         for (p = str; *p != '\0'; p++) {
3212                 if (*p == '/' && !in_escape)
3213                         *p = separator;
3214                 else if (*p == '&' && *(p + 1) != '-' && !in_escape)
3215                         in_escape = TRUE;
3216                 else if (*p == '-' && in_escape)
3217                         in_escape = FALSE;
3218         }
3219 }
3220
3221 static gchar *imap_modified_utf7_to_locale(const gchar *mutf7_str)
3222 {
3223 #if !HAVE_ICONV
3224         const gchar *from_p;
3225         gchar *to, *to_p;
3226
3227         to = g_malloc(strlen(mutf7_str) + 1);
3228         to_p = to;
3229
3230         for (from_p = mutf7_str; *from_p != '\0'; from_p++) {
3231                 if (*from_p == '&' && *(from_p + 1) == '-') {
3232                         *to_p++ = '&';
3233                         from_p++;
3234                 } else
3235                         *to_p++ = *from_p;
3236         }
3237         *to_p = '\0';
3238
3239         return to;
3240 #else
3241         static iconv_t cd = (iconv_t)-1;
3242         static gboolean iconv_ok = TRUE;
3243         GString *norm_utf7;
3244         gchar *norm_utf7_p;
3245         size_t norm_utf7_len;
3246         const gchar *p;
3247         gchar *to_str, *to_p;
3248         size_t to_len;
3249         gboolean in_escape = FALSE;
3250
3251         if (!iconv_ok) return g_strdup(mutf7_str);
3252
3253         if (cd == (iconv_t)-1) {
3254                 cd = iconv_open(conv_get_current_charset_str(), "UTF-7");
3255                 if (cd == (iconv_t)-1) {
3256                         g_warning("iconv cannot convert UTF-7 to %s\n",
3257                                   conv_get_current_charset_str());
3258                         iconv_ok = FALSE;
3259                         return g_strdup(mutf7_str);
3260                 }
3261         }
3262
3263         norm_utf7 = g_string_new(NULL);
3264
3265         for (p = mutf7_str; *p != '\0'; p++) {
3266                 /* replace: '&'  -> '+',
3267                             "&-" -> '&',
3268                             escaped ','  -> '/' */
3269                 if (!in_escape && *p == '&') {
3270                         if (*(p + 1) != '-') {
3271                                 g_string_append_c(norm_utf7, '+');
3272                                 in_escape = TRUE;
3273                         } else {
3274                                 g_string_append_c(norm_utf7, '&');
3275                                 p++;
3276                         }
3277                 } else if (in_escape && *p == ',') {
3278                         g_string_append_c(norm_utf7, '/');
3279                 } else if (in_escape && *p == '-') {
3280                         g_string_append_c(norm_utf7, '-');
3281                         in_escape = FALSE;
3282                 } else {
3283                         g_string_append_c(norm_utf7, *p);
3284                 }
3285         }
3286
3287         norm_utf7_p = norm_utf7->str;
3288         norm_utf7_len = norm_utf7->len;
3289         to_len = strlen(mutf7_str) * 5;
3290         to_p = to_str = g_malloc(to_len + 1);
3291
3292         if (iconv(cd, (ICONV_CONST gchar **)&norm_utf7_p, &norm_utf7_len,
3293                   &to_p, &to_len) == -1) {
3294                 g_warning(_("iconv cannot convert UTF-7 to %s\n"),
3295                           conv_get_current_charset_str());
3296                 g_string_free(norm_utf7, TRUE);
3297                 g_free(to_str);
3298                 return g_strdup(mutf7_str);
3299         }
3300
3301         /* second iconv() call for flushing */
3302         iconv(cd, NULL, NULL, &to_p, &to_len);
3303         g_string_free(norm_utf7, TRUE);
3304         *to_p = '\0';
3305
3306         return to_str;
3307 #endif /* !HAVE_ICONV */
3308 }
3309
3310 static gchar *imap_locale_to_modified_utf7(const gchar *from)
3311 {
3312 #if !HAVE_ICONV
3313         const gchar *from_p;
3314         gchar *to, *to_p;
3315
3316         to = g_malloc(strlen(from) * 2 + 1);
3317         to_p = to;
3318
3319         for (from_p = from; *from_p != '\0'; from_p++) {
3320                 if (*from_p == '&') {
3321                         *to_p++ = '&';
3322                         *to_p++ = '-';
3323                 } else
3324                         *to_p++ = *from_p;
3325         }
3326         *to_p = '\0';
3327
3328         return to;
3329 #else
3330         static iconv_t cd = (iconv_t)-1;
3331         static gboolean iconv_ok = TRUE;
3332         gchar *norm_utf7, *norm_utf7_p;
3333         size_t from_len, norm_utf7_len;
3334         GString *to_str;
3335         gchar *from_tmp, *to, *p;
3336         gboolean in_escape = FALSE;
3337
3338         if (!iconv_ok) return g_strdup(from);
3339
3340         if (cd == (iconv_t)-1) {
3341                 cd = iconv_open("UTF-7", conv_get_current_charset_str());
3342                 if (cd == (iconv_t)-1) {
3343                         g_warning("iconv cannot convert %s to UTF-7\n",
3344                                   conv_get_current_charset_str());
3345                         iconv_ok = FALSE;
3346                         return g_strdup(from);
3347                 }
3348         }
3349
3350         Xstrdup_a(from_tmp, from, return g_strdup(from));
3351         from_len = strlen(from);
3352         norm_utf7_len = from_len * 5;
3353         Xalloca(norm_utf7, norm_utf7_len + 1, return g_strdup(from));
3354         norm_utf7_p = norm_utf7;
3355
3356 #define IS_PRINT(ch) (isprint(ch) && isascii(ch))
3357
3358         while (from_len > 0) {
3359                 if (*from_tmp == '+') {
3360                         *norm_utf7_p++ = '+';
3361                         *norm_utf7_p++ = '-';
3362                         norm_utf7_len -= 2;
3363                         from_tmp++;
3364                         from_len--;
3365                 } else if (IS_PRINT(*from_tmp)) {
3366                         /* printable ascii char */
3367                         *norm_utf7_p = *from_tmp;
3368                         norm_utf7_p++;
3369                         norm_utf7_len--;
3370                         from_tmp++;
3371                         from_len--;
3372                 } else {
3373                         size_t mb_len = 0, conv_len = 0;
3374
3375                         /* unprintable char: convert to UTF-7 */
3376                         p = from_tmp;
3377                         while (!IS_PRINT(*p) && conv_len < from_len) {
3378                                 mb_len = mblen(p, MB_LEN_MAX);
3379                                 if (mb_len <= 0) {
3380                                         g_warning("wrong multibyte sequence\n");
3381                                         return g_strdup(from);
3382                                 }
3383                                 conv_len += mb_len;
3384                                 p += mb_len;
3385                         }
3386
3387                         from_len -= conv_len;
3388                         if (iconv(cd, (ICONV_CONST gchar **)&from_tmp,
3389                                   &conv_len,
3390                                   &norm_utf7_p, &norm_utf7_len) == -1) {
3391                                 g_warning("iconv cannot convert %s to UTF-7\n",
3392                                           conv_get_current_charset_str());
3393                                 return g_strdup(from);
3394                         }
3395
3396                         /* second iconv() call for flushing */
3397                         iconv(cd, NULL, NULL, &norm_utf7_p, &norm_utf7_len);
3398                 }
3399         }
3400
3401 #undef IS_PRINT
3402
3403         *norm_utf7_p = '\0';
3404         to_str = g_string_new(NULL);
3405         for (p = norm_utf7; p < norm_utf7_p; p++) {
3406                 /* replace: '&' -> "&-",
3407                             '+' -> '&',
3408                             "+-" -> '+',
3409                             BASE64 '/' -> ',' */
3410                 if (!in_escape && *p == '&') {
3411                         g_string_append(to_str, "&-");
3412                 } else if (!in_escape && *p == '+') {
3413                         if (*(p + 1) == '-') {
3414                                 g_string_append_c(to_str, '+');
3415                                 p++;
3416                         } else {
3417                                 g_string_append_c(to_str, '&');
3418                                 in_escape = TRUE;
3419                         }
3420                 } else if (in_escape && *p == '/') {
3421                         g_string_append_c(to_str, ',');
3422                 } else if (in_escape && *p == '-') {
3423                         g_string_append_c(to_str, '-');
3424                         in_escape = FALSE;
3425                 } else {
3426                         g_string_append_c(to_str, *p);
3427                 }
3428         }
3429
3430         if (in_escape) {
3431                 in_escape = FALSE;
3432                 g_string_append_c(to_str, '-');
3433         }
3434
3435         to = to_str->str;
3436         g_string_free(to_str, FALSE);
3437
3438         return to;
3439 #endif /* !HAVE_ICONV */
3440 }
3441
3442 static GSList *imap_get_seq_set_from_numlist(MsgNumberList *numlist)
3443 {
3444         GString *str;
3445         GSList *sorted_list, *cur;
3446         guint first, last, next;
3447         gchar *ret_str;
3448         GSList *ret_list = NULL;
3449
3450         if (numlist == NULL)
3451                 return NULL;
3452
3453         str = g_string_sized_new(256);
3454
3455         sorted_list = g_slist_copy(numlist);
3456         sorted_list = g_slist_sort(sorted_list, g_int_compare);
3457
3458         first = GPOINTER_TO_INT(sorted_list->data);
3459
3460         for (cur = sorted_list; cur != NULL; cur = g_slist_next(cur)) {
3461                 last = GPOINTER_TO_INT(cur->data);
3462                 if (cur->next)
3463                         next = GPOINTER_TO_INT(cur->next->data);
3464                 else
3465                         next = 0;
3466
3467                 if (last + 1 != next || next == 0) {
3468                         if (str->len > 0)
3469                                 g_string_append_c(str, ',');
3470                         if (first == last)
3471                                 g_string_sprintfa(str, "%u", first);
3472                         else
3473                                 g_string_sprintfa(str, "%u:%u", first, last);
3474
3475                         first = next;
3476
3477                         if (str->len > IMAP_CMD_LIMIT) {
3478                                 ret_str = g_strdup(str->str);
3479                                 ret_list = g_slist_append(ret_list, ret_str);
3480                                 g_string_truncate(str, 0);
3481                         }
3482                 }
3483         }
3484
3485         if (str->len > 0) {
3486                 ret_str = g_strdup(str->str);
3487                 ret_list = g_slist_append(ret_list, ret_str);
3488         }
3489
3490         g_slist_free(sorted_list);
3491         g_string_free(str, TRUE);
3492
3493         return ret_list;
3494 }
3495
3496 static GSList *imap_get_seq_set_from_msglist(MsgInfoList *msglist)
3497 {
3498         MsgNumberList *numlist = NULL;
3499         MsgInfoList *cur;
3500         GSList *seq_list;
3501
3502         for (cur = msglist; cur != NULL; cur = g_slist_next(cur)) {
3503                 MsgInfo *msginfo = (MsgInfo *) cur->data;
3504
3505                 numlist = g_slist_append(numlist, GINT_TO_POINTER(msginfo->msgnum));
3506         }
3507         seq_list = imap_get_seq_set_from_numlist(numlist);
3508         g_slist_free(numlist);
3509
3510         return seq_list;
3511 }
3512
3513 static void imap_seq_set_free(GSList *seq_list)
3514 {
3515         slist_free_strings(seq_list);
3516         g_slist_free(seq_list);
3517 }
3518
3519
3520 static gboolean imap_rename_folder_func(GNode *node, gpointer data)
3521 {
3522         FolderItem *item = node->data;
3523         gchar **paths = data;
3524         const gchar *oldpath = paths[0];
3525         const gchar *newpath = paths[1];
3526         gchar *base;
3527         gchar *new_itempath;
3528         gint oldpathlen;
3529
3530         oldpathlen = strlen(oldpath);
3531         if (strncmp(oldpath, item->path, oldpathlen) != 0) {
3532                 g_warning("path doesn't match:&n