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         gchar **capability;
  83         gchar *mbox;
  84         time_t last_access_time;
  85         gboolean authenticated;
  86         guint cmd_count;
  87         gboolean folder_content_changed;
  88         guint exists;
  89 };
  90
  91 struct _IMAPNameSpace
  92 {
  93         gchar *name;
  94         gchar separator;
  95 };
  96
  97 #define IMAP_SUCCESS    0
  98 #define IMAP_SOCKET     2
  99 #define IMAP_AUTHFAIL   3
 100 #define IMAP_PROTOCOL   4
 101 #define IMAP_SYNTAX     5
 102 #define IMAP_IOERR      6
 103 #define IMAP_ERROR      7
 104
 105 #define IMAPBUFSIZE     8192
 106
 107 typedef enum
 108 {
 109         IMAP_FLAG_SEEN          = 1 << 0,
 110         IMAP_FLAG_ANSWERED      = 1 << 1,
 111         IMAP_FLAG_FLAGGED       = 1 << 2,
 112         IMAP_FLAG_DELETED       = 1 << 3,
 113         IMAP_FLAG_DRAFT         = 1 << 4
 114 } IMAPFlags;
 115
 116 #define IMAP_IS_SEEN(flags)     ((flags & IMAP_FLAG_SEEN) != 0)
 117 #define IMAP_IS_ANSWERED(flags) ((flags & IMAP_FLAG_ANSWERED) != 0)
 118 #define IMAP_IS_FLAGGED(flags)  ((flags & IMAP_FLAG_FLAGGED) != 0)
 119 #define IMAP_IS_DELETED(flags)  ((flags & IMAP_FLAG_DELETED) != 0)
 120 #define IMAP_IS_DRAFT(flags)    ((flags & IMAP_FLAG_DRAFT) != 0)
 121
 122
 123 #define IMAP4_PORT      143
 124 #if USE_OPENSSL
 125 #define IMAPS_PORT      993
 126 #endif
 127
 128 #define IMAP_CMD_LIMIT  1000
 129
 130 #define QUOTE_IF_REQUIRED(out, str)                             \
 131 {                                                               \
 132         if (*str != '"' && strpbrk(str, " \t(){}%*") != NULL) { \
 133                 gchar *__tmp;                                   \
 134                 gint len;                                       \
 135                                                                 \
 136                 len = strlen(str) + 3;                          \
 137                 Xalloca(__tmp, len, return IMAP_ERROR);         \
 138                 g_snprintf(__tmp, len, "\"%s\"", str);          \
 139                 out = __tmp;                                    \
 140         } else {                                                \
 141                 Xstrdup_a(out, str, return IMAP_ERROR);         \
 142         }                                                       \
 143 }
 144
 145 typedef gchar * IMAPSet;
 146
 147 struct _IMAPFolderItem
 148 {
 149         FolderItem item;
 150
 151         guint lastuid;
 152         guint uid_next;
 153         GSList *uid_list;
 154 };
 155
 156 static Folder *imap_folder_new(const gchar * name, const gchar * path);
 157 static void imap_folder_destroy(Folder * folder);
 158
 159 static IMAPSession *imap_session_new(const PrefsAccount * account);
 160 static void imap_session_authenticate(IMAPSession * session,
 161                                       const PrefsAccount * account);
 162 static void imap_session_destroy(Session * session);
 163
 164 static gchar *imap_fetch_msg(Folder * folder, FolderItem * item, gint uid);
 165 static gint imap_add_msg(Folder * folder,
 166                          FolderItem * dest,
 167                          const gchar * file, MsgFlags * flags);
 168 static gint imap_add_msgs(Folder * folder, FolderItem * dest,
 169                           GSList * file_list,
 170                           GRelation *relation);
 171
 172 static gint imap_copy_msg(Folder * folder,
 173                           FolderItem * dest, MsgInfo * msginfo);
 174 static gint imap_copy_msgs(Folder *folder, FolderItem *dest,
 175                     MsgInfoList *msglist, GRelation *relation);
 176
 177 static gint imap_remove_msg(Folder * folder, FolderItem * item, gint uid);
 178 static gint imap_remove_all_msg(Folder * folder, FolderItem * item);
 179
 180 static gboolean imap_is_msg_changed(Folder * folder,
 181                                     FolderItem * item, MsgInfo * msginfo);
 182
 183 static gint imap_close(Folder * folder, FolderItem * item);
 184
 185 static void imap_scan_tree(Folder * folder);
 186
 187 static gint imap_create_tree(Folder * folder);
 188
 189 static FolderItem *imap_create_folder(Folder * folder,
 190                                       FolderItem * parent,
 191                                       const gchar * name);
 192 static gint imap_rename_folder(Folder * folder,
 193                                FolderItem * item, const gchar * name);
 194 static gint imap_remove_folder(Folder * folder, FolderItem * item);
 195
 196
 197 static void imap_folder_init            (Folder         *folder,
 198                                          const gchar    *name,
 199                                          const gchar    *path);
 200
 201 static FolderItem *imap_folder_item_new (Folder         *folder);
 202 static void imap_folder_item_destroy    (Folder         *folder,
 203                                          FolderItem     *item);
 204
 205 static IMAPSession *imap_session_get    (Folder         *folder);
 206
 207 static gint imap_auth                   (IMAPSession    *session,
 208                                          const gchar    *user,
 209                                          const gchar    *pass,
 210                                          IMAPAuthType    type);
 211
 212 static gint imap_scan_tree_recursive    (IMAPSession    *session,
 213                                          FolderItem     *item);
 214 static GSList *imap_parse_list          (IMAPFolder     *folder,
 215                                          IMAPSession    *session,
 216                                          const gchar    *real_path,
 217                                          gchar          *separator);
 218
 219 static void imap_create_missing_folders (Folder                 *folder);
 220 static FolderItem *imap_create_special_folder
 221                                         (Folder                 *folder,
 222                                          SpecialFolderItemType   stype,
 223                                          const gchar            *name);
 224
 225 static gint imap_do_copy_msgs           (Folder         *folder,
 226                                          FolderItem     *dest,
 227                                          MsgInfoList    *msglist,
 228                                          GRelation      *relation);
 229
 230 static void imap_delete_all_cached_messages     (FolderItem     *item);
 231
 232 #if USE_OPENSSL
 233 static SockInfo *imap_open              (const gchar    *server,
 234                                          gushort         port,
 235                                          SSLType         ssl_type);
 236 #else
 237 static SockInfo *imap_open              (const gchar    *server,
 238                                          gushort         port);
 239 #endif
 240
 241 #if USE_OPENSSL
 242 static SockInfo *imap_open_tunnel(const gchar *server,
 243                                   const gchar *tunnelcmd,
 244                                   SSLType ssl_type);
 245 #else
 246 static SockInfo *imap_open_tunnel(const gchar *server,
 247                                   const gchar *tunnelcmd);
 248 #endif
 249
 250 #if USE_OPENSSL
 251 static SockInfo *imap_init_sock(SockInfo *sock, SSLType ssl_type);
 252 #else
 253 static SockInfo *imap_init_sock(SockInfo *sock);
 254 #endif
 255
 256 static gchar *imap_get_flag_str         (IMAPFlags       flags);
 257 static gint imap_set_message_flags      (IMAPSession    *session,
 258                                          MsgNumberList  *numlist,
 259                                          IMAPFlags       flags,
 260                                          gboolean        is_set);
 261 static gint imap_select                 (IMAPSession    *session,
 262                                          IMAPFolder     *folder,
 263                                          const gchar    *path,
 264                                          gint           *exists,
 265                                          gint           *recent,
 266                                          gint           *unseen,
 267                                          guint32        *uid_validity);
 268 static gint imap_status                 (IMAPSession    *session,
 269                                          IMAPFolder     *folder,
 270                                          const gchar    *path,
 271                                          gint           *messages,
 272                                          gint           *recent,
 273                                          guint32        *uid_next,
 274                                          guint32        *uid_validity,
 275                                          gint           *unseen);
 276
 277 static void imap_parse_namespace                (IMAPSession    *session,
 278                                                  IMAPFolder     *folder);
 279 static void imap_get_namespace_by_list          (IMAPSession    *session,
 280                                                  IMAPFolder     *folder);
 281 static IMAPNameSpace *imap_find_namespace       (IMAPFolder     *folder,
 282                                                  const gchar    *path);
 283 static gchar imap_get_path_separator            (IMAPFolder     *folder,
 284                                                  const gchar    *path);
 285 static gchar *imap_get_real_path                (IMAPFolder     *folder,
 286                                                  const gchar    *path);
 287
 288 static gchar *imap_parse_atom           (SockInfo       *sock,
 289                                          gchar          *src,
 290                                          gchar          *dest,
 291                                          gint            dest_len,
 292                                          GString        *str);
 293 static MsgFlags imap_parse_flags        (const gchar    *flag_str);
 294 static MsgInfo *imap_parse_envelope     (SockInfo       *sock,
 295                                          FolderItem     *item,
 296                                          GString        *line_str);
 297 static gint imap_greeting               (IMAPSession    *session);
 298 static gboolean imap_has_capability     (IMAPSession    *session,
 299                                          const gchar    *cap);
 300 void imap_free_capabilities             (IMAPSession    *session);
 301
 302 /* low-level IMAP4rev1 commands */
 303 static gint imap_cmd_authenticate
 304                                 (IMAPSession    *session,
 305                                  const gchar    *user,
 306                                  const gchar    *pass,
 307                                  IMAPAuthType    type);
 308 static gint imap_cmd_login      (IMAPSession    *sock,
 309                                  const gchar    *user,
 310                                  const gchar    *pass);
 311 static gint imap_cmd_logout     (IMAPSession    *sock);
 312 static gint imap_cmd_noop       (IMAPSession    *sock);
 313 static gint imap_cmd_starttls   (IMAPSession    *sock);
 314 static gint imap_cmd_namespace  (IMAPSession    *sock,
 315                                  gchar         **ns_str);
 316 static gint imap_cmd_list       (IMAPSession    *session,
 317                                  const gchar    *ref,
 318                                  const gchar    *mailbox,
 319                                  GPtrArray      *argbuf);
 320 static gint imap_cmd_do_select  (IMAPSession    *sock,
 321                                  const gchar    *folder,
 322                                  gboolean        examine,
 323                                  gint           *exists,
 324                                  gint           *recent,
 325                                  gint           *unseen,
 326                                  guint32        *uid_validity);
 327 static gint imap_cmd_select     (IMAPSession    *sock,
 328                                  const gchar    *folder,
 329                                  gint           *exists,
 330                                  gint           *recent,
 331                                  gint           *unseen,
 332                                  guint32        *uid_validity);
 333 static gint imap_cmd_examine    (IMAPSession    *sock,
 334                                  const gchar    *folder,
 335                                  gint           *exists,
 336                                  gint           *recent,
 337                                  gint           *unseen,
 338                                  guint32        *uid_validity);
 339 static gint imap_cmd_create     (IMAPSession    *sock,
 340                                  const gchar    *folder);
 341 static gint imap_cmd_rename     (IMAPSession    *sock,
 342                                  const gchar    *oldfolder,
 343                                  const gchar    *newfolder);
 344 static gint imap_cmd_delete     (IMAPSession    *sock,
 345                                  const gchar    *folder);
 346 static gint imap_cmd_envelope   (IMAPSession    *sock,
 347                                  IMAPSet         set);
 348 static gint imap_cmd_fetch      (IMAPSession    *sock,
 349                                  guint32         uid,
 350                                  const gchar    *filename);
 351 static gint imap_cmd_append     (IMAPSession    *session,
 352                                  const gchar    *destfolder,
 353                                  const gchar    *file,
 354                                  IMAPFlags       flags,
 355                                  gint32         *newuid);
 356 static gint imap_cmd_copy       (IMAPSession    *session,
 357                                  const gchar    *seq_set,
 358                                  const gchar    *destfolder,
 359                                  GRelation      *uid_mapping);
 360 static gint imap_cmd_store      (IMAPSession    *sock,
 361                                  IMAPSet         set,
 362                                  gchar          *sub_cmd);
 363 static gint imap_cmd_expunge    (IMAPSession    *sock);
 364 static gint imap_cmd_close     (IMAPSession    *session);
 365
 366 static gint imap_cmd_ok         (IMAPSession    *session,
 367                                  GPtrArray      *argbuf);
 368 static void imap_gen_send       (IMAPSession    *sock,
 369                                  const gchar    *format, ...);
 370 static gint imap_gen_recv       (IMAPSession    *sock,
 371                                  gchar         **ret);
 372
 373 /* misc utility functions */
 374 static gchar *strchr_cpy                        (const gchar    *src,
 375                                                  gchar           ch,
 376                                                  gchar          *dest,
 377                                                  gint            len);
 378 static gchar *get_quoted                        (const gchar    *src,
 379                                                  gchar           ch,
 380                                                  gchar          *dest,
 381                                                  gint            len);
 382 static gchar *search_array_contain_str          (GPtrArray      *array,
 383                                                  const gchar    *str);
 384 static gchar *search_array_str                  (GPtrArray      *array,
 385                                                  const gchar    *str);
 386 static void imap_path_separator_subst           (gchar          *str,
 387                                                  gchar           separator);
 388
 389 static gchar *imap_modified_utf7_to_locale      (const gchar    *mutf7_str);
 390 static gchar *imap_locale_to_modified_utf7      (const gchar    *from);
 391
 392 static GSList *imap_get_seq_set_from_numlist    (MsgNumberList  *msglist);
 393 static GSList *imap_get_seq_set_from_msglist    (MsgInfoList    *msglist);
 394 static void imap_seq_set_free                   (GSList         *seq_list);
 395
 396 static gboolean imap_rename_folder_func         (GNode          *node,
 397                                                  gpointer        data);
 398 static gint imap_get_num_list                   (Folder         *folder,
 399                                                  FolderItem     *item,
 400                                                  GSList        **list);
 401 static GSList *imap_get_msginfos                (Folder         *folder,
 402                                                  FolderItem     *item,
 403                                                  GSList         *msgnum_list);
 404 static MsgInfo *imap_get_msginfo                (Folder         *folder,
 405                                                  FolderItem     *item,
 406                                                  gint            num);
 407 static gboolean imap_check_msgnum_validity      (Folder         *folder,
 408                                                  FolderItem     *item);
 409 static void imap_change_flags                   (Folder         *folder,
 410                                                  FolderItem     *item,
 411                                                  MsgInfo        *msginfo,
 412                                                  MsgPermFlags   newflags);
 413 static gchar *imap_folder_get_path              (Folder         *folder);
 414 static gchar *imap_item_get_path                (Folder         *folder,
 415                                                  FolderItem     *item);
 416
 417 FolderClass imap_class =
 418 {
 419         F_IMAP,
 420         "imap",
 421         "IMAP4",
 422
 423         /* Folder functions */
 424         imap_folder_new,
 425         imap_folder_destroy,
 426         imap_scan_tree,
 427         imap_create_tree,
 428
 429         /* FolderItem functions */
 430         imap_folder_item_new,
 431         imap_folder_item_destroy,
 432         imap_item_get_path,
 433         imap_create_folder,
 434         imap_rename_folder,
 435         imap_remove_folder,
 436         imap_close,
 437         imap_get_num_list,
 438         NULL,
 439         NULL,
 440         NULL,
 441         imap_check_msgnum_validity,
 442
 443         /* Message functions */
 444         imap_get_msginfo,
 445         imap_get_msginfos,
 446         imap_fetch_msg,
 447         imap_add_msg,
 448         imap_add_msgs,
 449         imap_copy_msg,
 450         imap_copy_msgs,
 451         imap_remove_msg,
 452         imap_remove_all_msg,
 453         imap_is_msg_changed,
 454         imap_change_flags,
 455 };
 456
 457 FolderClass *imap_get_class(void)
 458 {
 459         return &imap_class;
 460 }
 461
 462 Folder *imap_folder_new(const gchar *name, const gchar *path)
 463 {
 464         Folder *folder;
 465
 466         folder = (Folder *)g_new0(IMAPFolder, 1);
 467         folder->klass = &imap_class;
 468         imap_folder_init(folder, name, path);
 469
 470         return folder;
 471 }
 472
 473 void imap_folder_destroy(Folder *folder)
 474 {
 475         gchar *dir;
 476
 477         dir = imap_folder_get_path(folder);
 478         if (is_dir_exist(dir))
 479                 remove_dir_recursive(dir);
 480         g_free(dir);
 481
 482         folder_remote_folder_destroy(REMOTE_FOLDER(folder));
 483 }
 484
 485 static void imap_folder_init(Folder *folder, const gchar *name,
 486                              const gchar *path)
 487 {
 488         folder_remote_folder_init((Folder *)folder, name, path);
 489 }
 490
 491 static FolderItem *imap_folder_item_new(Folder *folder)
 492 {
 493         IMAPFolderItem *item;
 494
 495         item = g_new0(IMAPFolderItem, 1);
 496         item->lastuid = 0;
 497         item->uid_next = 0;
 498         item->uid_list = NULL;
 499
 500         return (FolderItem *)item;
 501 }
 502
 503 static void imap_folder_item_destroy(Folder *folder, FolderItem *_item)
 504 {
 505         IMAPFolderItem *item = (IMAPFolderItem *)_item;
 506
 507         g_return_if_fail(item != NULL);
 508         g_slist_free(item->uid_list);
 509
 510         g_free(_item);
 511 }
 512
 513 static gboolean imap_reset_uid_lists_func(GNode *node, gpointer data)
 514 {
 515         IMAPFolderItem *item = (IMAPFolderItem *)node->data;
 516
 517         item->lastuid = 0;
 518         item->uid_next = 0;
 519         g_slist_free(item->uid_list);
 520         item->uid_list = NULL;
 521
 522         return FALSE;
 523 }
 524
 525 static void imap_reset_uid_lists(Folder *folder)
 526 {
 527         if(folder->node == NULL)
 528                 return;
 529
 530         /* Destroy all uid lists and rest last uid */
 531         g_node_traverse(folder->node, G_IN_ORDER, G_TRAVERSE_ALL, -1, imap_reset_uid_lists_func, NULL);
 532 }
 533
 534 static gint imap_auth(IMAPSession *session, const gchar *user, const gchar *pass,
 535                       IMAPAuthType type)
 536 {
 537         if (type == 0 || type == IMAP_AUTH_LOGIN)
 538                 return imap_cmd_login(session, user, pass);
 539         else
 540                 return imap_cmd_authenticate(session, user, pass, type);
 541 }
 542
 543 static IMAPSession *imap_session_get(Folder *folder)
 544 {
 545         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
 546         IMAPSession *session = NULL;
 547
 548         g_return_val_if_fail(folder != NULL, NULL);
 549         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, NULL);
 550         g_return_val_if_fail(folder->account != NULL, NULL);
 551
 552         /* Make sure we have a session */
 553         if (rfolder->session != NULL) {
 554                 session = IMAP_SESSION(rfolder->session);
 555         } else {
 556                 imap_reset_uid_lists(folder);
 557                 session = imap_session_new(folder->account);
 558         }
 559         if(session == NULL)
 560                 return NULL;
 561
 562         if (SESSION(session)->sock->state == CONN_DISCONNECTED) {
 563                 debug_print("IMAP server disconnected\n");
 564                 session_destroy(SESSION(session));
 565                 imap_reset_uid_lists(folder);
 566                 session = imap_session_new(folder->account);
 567         }
 568
 569         /* Make sure session is authenticated */
 570         if (!IMAP_SESSION(session)->authenticated)
 571                 imap_session_authenticate(IMAP_SESSION(session), folder->account);
 572         if (!IMAP_SESSION(session)->authenticated) {
 573                 session_destroy(SESSION(session));
 574                 rfolder->session = NULL;
 575                 return NULL;
 576         }
 577
 578         /* Make sure we have parsed the IMAP namespace */
 579         imap_parse_namespace(IMAP_SESSION(session),
 580                              IMAP_FOLDER(folder));
 581
 582         /* I think the point of this code is to avoid sending a
 583          * keepalive if we've used the session recently and therefore
 584          * think it's still alive.  Unfortunately, most of the code
 585          * does not yet check for errors on the socket, and so if the
 586          * connection drops we don't notice until the timeout expires.
 587          * A better solution than sending a NOOP every time would be
 588          * for every command to be prepared to retry until it is
 589          * successfully sent. -- mbp */
 590         if (time(NULL) - session->last_access_time > SESSION_TIMEOUT) {
 591                 /* verify that the session is still alive */
 592                 if (imap_cmd_noop(session) != IMAP_SUCCESS) {
 593                         /* Check if this is the first try to establish a
 594                            connection, if yes we don't try to reconnect */
 595                         if (rfolder->session == NULL) {
 596                                 log_warning(_("Connecting %s failed"),
 597                                             folder->account->recv_server);
 598                                 session_destroy(SESSION(session));
 599                                 session = NULL;
 600                         } else {
 601                                 log_warning(_("IMAP4 connection to %s has been"
 602                                               " disconnected. Reconnecting...\n"),
 603                                             folder->account->recv_server);
 604                                 session_destroy(SESSION(session));
 605                                 /* Clear folders session to make imap_session_get create
 606                                    a new session, because of rfolder->session == NULL
 607                                    it will not try to reconnect again and so avoid an
 608                                    endless loop */
 609                                 rfolder->session = NULL;
 610                                 session = imap_session_get(folder);
 611                         }
 612                 }
 613         }
 614
 615         rfolder->session = SESSION(session);
 616         if (session) {
 617                 session->last_access_time = time(NULL);
 618         }
 619         return IMAP_SESSION(session);
 620 }
 621
 622 IMAPSession *imap_session_new(const PrefsAccount *account)
 623 {
 624         IMAPSession *session;
 625         SockInfo *imap_sock;
 626         gushort port;
 627
 628 #ifdef USE_OPENSSL
 629         /* FIXME: IMAP over SSL only... */
 630         SSLType ssl_type;
 631
 632         port = account->set_imapport ? account->imapport
 633                 : account->ssl_imap == SSL_TUNNEL ? IMAPS_PORT : IMAP4_PORT;
 634         ssl_type = account->ssl_imap;
 635 #else
 636         port = account->set_imapport ? account->imapport
 637                 : IMAP4_PORT;
 638 #endif
 639
 640         if (account->set_tunnelcmd) {
 641                 log_message(_("creating tunneled IMAP4 connection\n"));
 642 #if USE_OPENSSL
 643                 if ((imap_sock = imap_open_tunnel(account->recv_server,
 644                                                   account->tunnelcmd,
 645                                                   ssl_type)) == NULL)
 646 #else
 647                 if ((imap_sock = imap_open_tunnel(account->recv_server,
 648                                                   account->tunnelcmd)) == NULL)
 649 #endif
 650                         return NULL;
 651         } else {
 652                 g_return_val_if_fail(account->recv_server != NULL, NULL);
 653
 654                 log_message(_("creating IMAP4 connection to %s:%d ...\n"),
 655                             account->recv_server, port);
 656
 657 #if USE_OPENSSL
 658                 if ((imap_sock = imap_open(account->recv_server, port,
 659                                            ssl_type)) == NULL)
 660 #else
 661                 if ((imap_sock = imap_open(account->recv_server, port)) == NULL)
 662 #endif
 663                         return NULL;
 664         }
 665
 666         session = g_new0(IMAPSession, 1);
 667         session_init(SESSION(session));
 668         SESSION(session)->type             = SESSION_IMAP;
 669         SESSION(session)->server           = g_strdup(account->recv_server);
 670         SESSION(session)->sock             = imap_sock;
 671
 672         SESSION(session)->destroy          = imap_session_destroy;
 673
 674         session->capability = NULL;
 675
 676         session->mbox = NULL;
 677         session->authenticated = FALSE;
 678         session->cmd_count = 0;
 679
 680         /* Only need to log in if the connection was not PREAUTH */
 681         if (imap_greeting(session) != IMAP_SUCCESS) {
 682                 session_destroy(SESSION(session));
 683                 return NULL;
 684         }
 685
 686 #if USE_OPENSSL
 687         if (account->ssl_imap == SSL_STARTTLS && imap_has_capability(session, "STARTTLS")) {
 688                 gint ok;
 689
 690                 ok = imap_cmd_starttls(session);
 691                 if (ok != IMAP_SUCCESS) {
 692                         log_warning(_("Can't start TLS session.\n"));
 693                         session_destroy(SESSION(session));
 694                         return NULL;
 695                 }
 696                 if (!ssl_init_socket_with_method(SESSION(session)->sock, SSL_METHOD_TLSv1)) {
 697                         session_destroy(SESSION(session));
 698                         return NULL;
 699                 }
 700
 701                 imap_free_capabilities(session);
 702                 session->authenticated = FALSE;
 703                 session->cmd_count = 1;
 704
 705                 if (imap_greeting(session) != IMAP_SUCCESS) {
 706                         session_destroy(SESSION(session));
 707                         return NULL;
 708                 }
 709         }
 710 #endif
 711         log_message("IMAP connection is %s-authenticated\n",
 712                     (session->authenticated) ? "pre" : "un");
 713
 714         return session;
 715 }
 716
 717 void imap_session_authenticate(IMAPSession *session, const PrefsAccount *account)
 718 {
 719         gchar *pass;
 720
 721         g_return_if_fail(account->userid != NULL);
 722
 723         pass = account->passwd;
 724         if (!pass) {
 725                 gchar *tmp_pass;
 726                 tmp_pass = input_dialog_query_password(account->recv_server, account->userid);
 727                 if (!tmp_pass)
 728                         return;
 729                 Xstrdup_a(pass, tmp_pass, {g_free(tmp_pass); return;});
 730                 g_free(tmp_pass);
 731         }
 732
 733         if (imap_auth(session, account->userid, pass, account->imap_auth_type) != IMAP_SUCCESS) {
 734                 imap_cmd_logout(session);
 735                 return;
 736         }
 737
 738         session->authenticated = TRUE;
 739 }
 740
 741 void imap_session_destroy(Session *session)
 742 {
 743         sock_close(session->sock);
 744         session->sock = NULL;
 745
 746         g_free(IMAP_SESSION(session)->mbox);
 747         imap_free_capabilities(IMAP_SESSION(session));
 748 }
 749
 750 gchar *imap_fetch_msg(Folder *folder, FolderItem *item, gint uid)
 751 {
 752         gchar *path, *filename;
 753         IMAPSession *session;
 754         gint ok;
 755
 756         g_return_val_if_fail(folder != NULL, NULL);
 757         g_return_val_if_fail(item != NULL, NULL);
 758
 759         path = folder_item_get_path(item);
 760         if (!is_dir_exist(path))
 761                 make_dir_hier(path);
 762         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(uid), NULL);
 763         g_free(path);
 764
 765         if (is_file_exist(filename)) {
 766                 debug_print("message %d has been already cached.\n", uid);
 767                 return filename;
 768         }
 769
 770         session = imap_session_get(folder);
 771         if (!session) {
 772                 g_free(filename);
 773                 return NULL;
 774         }
 775
 776         ok = imap_select(session, IMAP_FOLDER(folder), item->path,
 777                          NULL, NULL, NULL, NULL);
 778         if (ok != IMAP_SUCCESS) {
 779                 g_warning("can't select mailbox %s\n", item->path);
 780                 g_free(filename);
 781                 return NULL;
 782         }
 783
 784         debug_print("getting message %d...\n", uid);
 785         ok = imap_cmd_fetch(session, (guint32)uid, filename);
 786
 787         if (ok != IMAP_SUCCESS) {
 788                 g_warning("can't fetch message %d\n", uid);
 789                 g_free(filename);
 790                 return NULL;
 791         }
 792
 793         return filename;
 794 }
 795
 796 gint imap_add_msg(Folder *folder, FolderItem *dest, const gchar *file, MsgFlags *flags)
 797 {
 798         gint ret;
 799         GSList file_list;
 800         MsgFileInfo fileinfo;
 801
 802         g_return_val_if_fail(file != NULL, -1);
 803
 804         fileinfo.msginfo = NULL;
 805         fileinfo.file = (gchar *)file;
 806         fileinfo.flags = flags;
 807         file_list.data = &fileinfo;
 808         file_list.next = NULL;
 809
 810         ret = imap_add_msgs(folder, dest, &file_list, NULL);
 811         return ret;
 812 }
 813
 814 gint imap_add_msgs(Folder *folder, FolderItem *dest, GSList *file_list,
 815                    GRelation *relation)
 816 {
 817         gchar *destdir;
 818         IMAPSession *session;
 819         guint32 last_uid = 0;
 820         GSList *cur;
 821         MsgFileInfo *fileinfo;
 822         gint ok, newnum;
 823
 824         g_return_val_if_fail(folder != NULL, -1);
 825         g_return_val_if_fail(dest != NULL, -1);
 826         g_return_val_if_fail(file_list != NULL, -1);
 827
 828         session = imap_session_get(folder);
 829         if (!session) return -1;
 830
 831         destdir = imap_get_real_path(IMAP_FOLDER(folder), dest->path);
 832
 833         for (cur = file_list; cur != NULL; cur = cur->next) {
 834                 IMAPFlags iflags = 0;
 835
 836                 fileinfo = (MsgFileInfo *)cur->data;
 837
 838                 if (fileinfo->flags) {
 839                         if (MSG_IS_MARKED(*fileinfo->flags))
 840                                 iflags |= IMAP_FLAG_FLAGGED;
 841                         if (MSG_IS_REPLIED(*fileinfo->flags))
 842                                 iflags |= IMAP_FLAG_ANSWERED;
 843                         if (!MSG_IS_UNREAD(*fileinfo->flags))
 844                                 iflags |= IMAP_FLAG_SEEN;
 845                 }
 846
 847                 if (dest->stype == F_OUTBOX ||
 848                     dest->stype == F_QUEUE  ||
 849                     dest->stype == F_DRAFT  ||
 850                     dest->stype == F_TRASH)
 851                         iflags |= IMAP_FLAG_SEEN;
 852
 853                 ok = imap_cmd_append(session, destdir, fileinfo->file, iflags, &newnum);
 854
 855                 if (ok != IMAP_SUCCESS) {
 856                         g_warning("can't append message %s\n", fileinfo->file);
 857                         g_free(destdir);
 858                         return -1;
 859                 }
 860
 861                 if (relation != NULL)
 862                         g_relation_insert(relation, fileinfo->msginfo != NULL ?
 863                                           fileinfo->msginfo : fileinfo,
 864                                           GINT_TO_POINTER(dest->last_num + 1));
 865                 if (newnum > last_uid)
 866                         last_uid = newnum;
 867         }
 868
 869         g_free(destdir);
 870
 871         return last_uid;
 872 }
 873
 874 static gint imap_do_copy_msgs(Folder *folder, FolderItem *dest,
 875                               MsgInfoList *msglist, GRelation *relation)
 876 {
 877         gchar *destdir;
 878         GSList *seq_list, *cur;
 879         MsgInfo *msginfo;
 880         IMAPSession *session;
 881         gint ok = IMAP_SUCCESS;
 882         GRelation *uid_mapping;
 883         gint last_num = 0;
 884
 885         g_return_val_if_fail(folder != NULL, -1);
 886         g_return_val_if_fail(dest != NULL, -1);
 887         g_return_val_if_fail(msglist != NULL, -1);
 888
 889         session = imap_session_get(folder);
 890         if (!session) return -1;
 891
 892         msginfo = (MsgInfo *)msglist->data;
 893         if (msginfo->folder == dest) {
 894                 g_warning("the src folder is identical to the dest.\n");
 895                 return -1;
 896         }
 897
 898         destdir = imap_get_real_path(IMAP_FOLDER(folder), dest->path);
 899         seq_list = imap_get_seq_set_from_msglist(msglist);
 900         uid_mapping = g_relation_new(2);
 901         g_relation_index(uid_mapping, 0, g_direct_hash, g_direct_equal);
 902
 903         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
 904                 gchar *seq_set = (gchar *)cur->data;
 905
 906                 debug_print("Copying message %s%c[%s] to %s ...\n",
 907                             msginfo->folder->path, G_DIR_SEPARATOR,
 908                             seq_set, destdir);
 909
 910                 ok = imap_cmd_copy(session, seq_set, destdir, uid_mapping);
 911                 if (ok != IMAP_SUCCESS) {
 912                         g_relation_destroy(uid_mapping);
 913                         imap_seq_set_free(seq_list);
 914                         return -1;
 915                 }
 916         }
 917
 918         for (cur = msglist; cur != NULL; cur = g_slist_next(cur)) {
 919                 MsgInfo *msginfo = (MsgInfo *)cur->data;
 920                 GTuples *tuples;
 921
 922                 tuples = g_relation_select(uid_mapping,
 923                                            GINT_TO_POINTER(msginfo->msgnum),
 924                                            0);
 925                 if (tuples->len > 0) {
 926                         gint num = GPOINTER_TO_INT(g_tuples_index(tuples, 0, 1));
 927                         g_relation_insert(relation, msginfo,
 928                                           GPOINTER_TO_INT(num));
 929                         if (num > last_num)
 930                                 last_num = num;
 931                 } else
 932                         g_relation_insert(relation, msginfo,
 933                                           GPOINTER_TO_INT(0));
 934                 g_tuples_destroy(tuples);
 935         }
 936
 937         imap_seq_set_free(seq_list);
 938
 939         g_free(destdir);
 940
 941         if (ok == IMAP_SUCCESS)
 942                 return last_num;
 943         else
 944                 return -1;
 945 }
 946
 947 gint imap_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
 948 {
 949         GSList msglist;
 950
 951         g_return_val_if_fail(msginfo != NULL, -1);
 952
 953         msglist.data = msginfo;
 954         msglist.next = NULL;
 955
 956         return imap_copy_msgs(folder, dest, &msglist, NULL);
 957 }
 958
 959 gint imap_copy_msgs(Folder *folder, FolderItem *dest,
 960                     MsgInfoList *msglist, GRelation *relation)
 961 {
 962         MsgInfo *msginfo;
 963         GSList *file_list;
 964         gint ret;
 965
 966         g_return_val_if_fail(folder != NULL, -1);
 967         g_return_val_if_fail(dest != NULL, -1);
 968         g_return_val_if_fail(msglist != NULL, -1);
 969
 970         msginfo = (MsgInfo *)msglist->data;
 971         g_return_val_if_fail(msginfo->folder != NULL, -1);
 972
 973         if (folder == msginfo->folder->folder)
 974                 return imap_do_copy_msgs(folder, dest, msglist, relation);
 975
 976         file_list = procmsg_get_message_file_list(msglist);
 977         g_return_val_if_fail(file_list != NULL, -1);
 978
 979         ret = imap_add_msgs(folder, dest, file_list, relation);
 980
 981         procmsg_message_file_list_free(file_list);
 982
 983         return ret;
 984 }
 985
 986 gint imap_remove_msg(Folder *folder, FolderItem *item, gint uid)
 987 {
 988         gint ok;
 989         IMAPSession *session;
 990         gchar *dir;
 991         MsgNumberList numlist;
 992
 993         g_return_val_if_fail(folder != NULL, -1);
 994         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
 995         g_return_val_if_fail(item != NULL, -1);
 996
 997         session = imap_session_get(folder);
 998         if (!session) return -1;
 999
1000         ok = imap_select(session, IMAP_FOLDER(folder), item->path,
1001                          NULL, NULL, NULL, NULL);
1002         if (ok != IMAP_SUCCESS)
1003                 return ok;
1004
1005         numlist.next = NULL;
1006         numlist.data = GINT_TO_POINTER(uid);
1007
1008         ok = imap_set_message_flags
1009                 (IMAP_SESSION(REMOTE_FOLDER(folder)->session),
1010                 &numlist, IMAP_FLAG_DELETED, TRUE);
1011         if (ok != IMAP_SUCCESS) {
1012                 log_warning(_("can't set deleted flags: %d\n"), uid);
1013                 return ok;
1014         }
1015
1016         ok = imap_cmd_expunge(session);
1017         if (ok != IMAP_SUCCESS) {
1018                 log_warning(_("can't expunge\n"));
1019                 return ok;
1020         }
1021
1022         dir = folder_item_get_path(item);
1023         if (is_dir_exist(dir))
1024                 remove_numbered_files(dir, uid, uid);
1025         g_free(dir);
1026
1027         return IMAP_SUCCESS;
1028 }
1029
1030 gint imap_remove_all_msg(Folder *folder, FolderItem *item)
1031 {
1032         gint exists, recent, unseen;
1033         guint32 uid_validity;
1034         gint ok;
1035         IMAPSession *session;
1036         gchar *dir;
1037
1038         g_return_val_if_fail(folder != NULL, -1);
1039         g_return_val_if_fail(item != NULL, -1);
1040
1041         session = imap_session_get(folder);
1042         if (!session) return -1;
1043
1044         ok = imap_select(session, IMAP_FOLDER(folder), item->path,
1045                          &exists, &recent, &unseen, &uid_validity);
1046         if (ok != IMAP_SUCCESS)
1047                 return ok;
1048         if (exists == 0)
1049                 return IMAP_SUCCESS;
1050
1051         imap_gen_send(session,
1052                       "STORE 1:%d +FLAGS.SILENT (\\Deleted)", exists);
1053         ok = imap_cmd_ok(session, NULL);
1054         if (ok != IMAP_SUCCESS) {
1055                 log_warning(_("can't set deleted flags: 1:%d\n"), exists);
1056                 return ok;
1057         }
1058
1059         ok = imap_cmd_expunge(session);
1060         if (ok != IMAP_SUCCESS) {
1061                 log_warning(_("can't expunge\n"));
1062                 return ok;
1063         }
1064
1065         dir = folder_item_get_path(item);
1066         if (is_dir_exist(dir))
1067                 remove_all_numbered_files(dir);
1068         g_free(dir);
1069
1070         return IMAP_SUCCESS;
1071 }
1072
1073 gboolean imap_is_msg_changed(Folder *folder, FolderItem *item, MsgInfo *msginfo)
1074 {
1075         /* TODO: properly implement this method */
1076         return FALSE;
1077 }
1078
1079 gint imap_close(Folder *folder, FolderItem *item)
1080 {
1081         gint ok;
1082         IMAPSession *session;
1083
1084         g_return_val_if_fail(folder != NULL, -1);
1085
1086         session = imap_session_get(folder);
1087         if (!session) return -1;
1088
1089         if (session->mbox) {
1090                 ok = imap_cmd_close(session);
1091                 if (ok != IMAP_SUCCESS)
1092                         log_warning(_("can't close folder\n"));
1093
1094                 g_free(session->mbox);
1095                 session->mbox = NULL;
1096
1097                 return ok;
1098         }
1099
1100         return 0;
1101 }
1102
1103 void imap_scan_tree(Folder *folder)
1104 {
1105         FolderItem *item;
1106         IMAPSession *session;
1107         gchar *root_folder = NULL;
1108
1109         g_return_if_fail(folder != NULL);
1110         g_return_if_fail(folder->account != NULL);
1111
1112         session = imap_session_get(folder);
1113         if (!session) {
1114                 if (!folder->node) {
1115                         folder_tree_destroy(folder);
1116                         item = folder_item_new(folder, folder->name, NULL);
1117                         item->folder = folder;
1118                         folder->node = g_node_new(item);
1119                 }
1120                 return;
1121         }
1122
1123         if (folder->account->imap_dir && *folder->account->imap_dir) {
1124                 Xstrdup_a(root_folder, folder->account->imap_dir, return);
1125                 strtailchomp(root_folder, '/');
1126                 debug_print("IMAP root directory: %s\n", root_folder);
1127         }
1128
1129         item = folder_item_new(folder, folder->name, root_folder);
1130         item->folder = folder;
1131         item->no_select = TRUE;
1132         folder->node = g_node_new(item);
1133
1134         imap_scan_tree_recursive(session, item);
1135
1136         imap_create_missing_folders(folder);
1137 }
1138
1139 static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item)
1140 {
1141         Folder *folder;
1142         IMAPFolder *imapfolder;
1143         FolderItem *new_item;
1144         GSList *item_list, *cur;
1145         gchar *real_path;
1146         gchar *wildcard_path;
1147         gchar separator;
1148         gchar wildcard[3];
1149
1150         g_return_val_if_fail(item != NULL, -1);
1151         g_return_val_if_fail(item->folder != NULL, -1);
1152         g_return_val_if_fail(item->no_sub == FALSE, -1);
1153
1154         folder = FOLDER(item->folder);
1155         imapfolder = IMAP_FOLDER(folder);
1156
1157         separator = imap_get_path_separator(imapfolder, item->path);
1158
1159         if (item->folder->ui_func)
1160                 item->folder->ui_func(folder, item, folder->ui_func_data);
1161
1162         if (item->path) {
1163                 wildcard[0] = separator;
1164                 wildcard[1] = '%';
1165                 wildcard[2] = '\0';
1166                 real_path = imap_get_real_path(imapfolder, item->path);
1167         } else {
1168                 wildcard[0] = '%';
1169                 wildcard[1] = '\0';
1170                 real_path = g_strdup("");
1171         }
1172
1173         Xstrcat_a(wildcard_path, real_path, wildcard,
1174                   {g_free(real_path); return IMAP_ERROR;});
1175         QUOTE_IF_REQUIRED(wildcard_path, wildcard_path);
1176
1177         imap_gen_send(session, "LIST \"\" %s",
1178                       wildcard_path);
1179
1180         strtailchomp(real_path, separator);
1181         item_list = imap_parse_list(imapfolder, session, real_path, NULL);
1182         g_free(real_path);
1183
1184         for (cur = item_list; cur != NULL; cur = cur->next) {
1185                 new_item = cur->data;
1186                 if (!strcmp(new_item->path, "INBOX")) {
1187                         if (!folder->inbox) {
1188                                 new_item->stype = F_INBOX;
1189                                 item->folder->inbox = new_item;
1190                         } else {
1191                                 folder_item_destroy(new_item);
1192                                 continue;
1193                         }
1194                 } else if (!item->parent || item->stype == F_INBOX) {
1195                         gchar *base;
1196
1197                         base = g_basename(new_item->path);
1198
1199                         if (!folder->outbox && !strcasecmp(base, "Sent")) {
1200                                 new_item->stype = F_OUTBOX;
1201                                 folder->outbox = new_item;
1202                         } else if (!folder->draft && !strcasecmp(base, "Drafts")) {
1203                                 new_item->stype = F_DRAFT;
1204                                 folder->draft = new_item;
1205                         } else if (!folder->queue && !strcasecmp(base, "Queue")) {
1206                                 new_item->stype = F_QUEUE;
1207                                 folder->queue = new_item;
1208                         } else if (!folder->trash && !strcasecmp(base, "Trash")) {
1209                                 new_item->stype = F_TRASH;
1210                                 folder->trash = new_item;
1211                         }
1212                 }
1213                 folder_item_append(item, new_item);
1214                 if (new_item->no_sub == FALSE)
1215                         imap_scan_tree_recursive(session, new_item);
1216         }
1217
1218         return IMAP_SUCCESS;
1219 }
1220
1221 static GSList *imap_parse_list(IMAPFolder *folder, IMAPSession *session,
1222                                const gchar *real_path, gchar *separator)
1223 {
1224         gchar buf[IMAPBUFSIZE];
1225         gchar flags[256];
1226         gchar separator_str[16];
1227         gchar *p;
1228         gchar *name;
1229         gchar *loc_name, *loc_path;
1230         GSList *item_list = NULL;
1231         GString *str;
1232         FolderItem *new_item;
1233
1234         debug_print("getting list of %s ...\n",
1235                     *real_path ? real_path : "\"\"");
1236
1237         str = g_string_new(NULL);
1238
1239         for (;;) {
1240                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) <= 0) {
1241                         log_warning(_("error occurred while getting LIST.\n"));
1242                         break;
1243                 }
1244                 strretchomp(buf);
1245                 if (buf[0] != '*' || buf[1] != ' ') {
1246                         log_print("IMAP4< %s\n", buf);
1247                         break;
1248                 }
1249                 debug_print("IMAP4< %s\n", buf);
1250
1251                 g_string_assign(str, buf);
1252                 p = str->str + 2;
1253                 if (strncmp(p, "LIST ", 5) != 0) continue;
1254                 p += 5;
1255
1256                 if (*p != '(') continue;
1257                 p++;
1258                 p = strchr_cpy(p, ')', flags, sizeof(flags));
1259                 if (!p) continue;
1260                 while (*p == ' ') p++;
1261
1262                 p = strchr_cpy(p, ' ', separator_str, sizeof(separator_str));
1263                 if (!p) continue;
1264                 extract_quote(separator_str, '"');
1265                 if (!strcmp(separator_str, "NIL"))
1266                         separator_str[0] = '\0';
1267                 if (separator)
1268                         *separator = separator_str[0];
1269
1270                 buf[0] = '\0';
1271                 while (*p == ' ') p++;
1272                 if (*p == '{' || *p == '"')
1273                         p = imap_parse_atom(SESSION(session)->sock, p,
1274                                             buf, sizeof(buf), str);
1275                 else
1276                         strncpy2(buf, p, sizeof(buf));
1277                 strtailchomp(buf, separator_str[0]);
1278                 if (buf[0] == '\0') continue;
1279                 if (!strcmp(buf, real_path)) continue;
1280
1281                 if (separator_str[0] != '\0')
1282                         subst_char(buf, separator_str[0], '/');
1283                 name = g_basename(buf);
1284                 if (name[0] == '.') continue;
1285
1286                 loc_name = imap_modified_utf7_to_locale(name);
1287                 loc_path = imap_modified_utf7_to_locale(buf);
1288                 new_item = folder_item_new(FOLDER(folder), loc_name, loc_path);
1289                 if (strcasestr(flags, "\\Noinferiors") != NULL)
1290                         new_item->no_sub = TRUE;
1291                 if (strcmp(buf, "INBOX") != 0 &&
1292                     strcasestr(flags, "\\Noselect") != NULL)
1293                         new_item->no_select = TRUE;
1294
1295                 item_list = g_slist_append(item_list, new_item);
1296
1297                 debug_print("folder %s has been added.\n", loc_path);
1298                 g_free(loc_path);
1299                 g_free(loc_name);
1300         }
1301
1302         g_string_free(str, TRUE);
1303
1304         return item_list;
1305 }
1306
1307 gint imap_create_tree(Folder *folder)
1308 {
1309         g_return_val_if_fail(folder != NULL, -1);
1310         g_return_val_if_fail(folder->node != NULL, -1);
1311         g_return_val_if_fail(folder->node->data != NULL, -1);
1312         g_return_val_if_fail(folder->account != NULL, -1);
1313
1314         imap_scan_tree(folder);
1315         imap_create_missing_folders(folder);
1316
1317         return 0;
1318 }
1319
1320 static void imap_create_missing_folders(Folder *folder)
1321 {
1322         g_return_if_fail(folder != NULL);
1323
1324         if (!folder->inbox)
1325                 folder->inbox = imap_create_special_folder
1326                         (folder, F_INBOX, "INBOX");
1327 #if 0
1328         if (!folder->outbox)
1329                 folder->outbox = imap_create_special_folder
1330                         (folder, F_OUTBOX, "Sent");
1331         if (!folder->draft)
1332                 folder->draft = imap_create_special_folder
1333                         (folder, F_DRAFT, "Drafts");
1334         if (!folder->queue)
1335                 folder->queue = imap_create_special_folder
1336                         (folder, F_QUEUE, "Queue");
1337 #endif
1338         if (!folder->trash)
1339                 folder->trash = imap_create_special_folder
1340                         (folder, F_TRASH, "Trash");
1341 }
1342
1343 static FolderItem *imap_create_special_folder(Folder *folder,
1344                                               SpecialFolderItemType stype,
1345                                               const gchar *name)
1346 {
1347         FolderItem *item;
1348         FolderItem *new_item;
1349
1350         g_return_val_if_fail(folder != NULL, NULL);
1351         g_return_val_if_fail(folder->node != NULL, NULL);
1352         g_return_val_if_fail(folder->node->data != NULL, NULL);
1353         g_return_val_if_fail(folder->account != NULL, NULL);
1354         g_return_val_if_fail(name != NULL, NULL);
1355
1356         item = FOLDER_ITEM(folder->node->data);
1357         new_item = imap_create_folder(folder, item, name);
1358
1359         if (!new_item) {
1360                 g_warning("Can't create '%s'\n", name);
1361                 if (!folder->inbox) return NULL;
1362
1363                 new_item = imap_create_folder(folder, folder->inbox, name);
1364                 if (!new_item)
1365                         g_warning("Can't create '%s' under INBOX\n", name);
1366                 else
1367                         new_item->stype = stype;
1368         } else
1369                 new_item->stype = stype;
1370
1371         return new_item;
1372 }
1373
1374 static gchar *imap_folder_get_path(Folder *folder)
1375 {
1376         gchar *folder_path;
1377
1378         g_return_val_if_fail(folder != NULL, NULL);
1379         g_return_val_if_fail(folder->account != NULL, NULL);
1380
1381         folder_path = g_strconcat(get_imap_cache_dir(),
1382                                   G_DIR_SEPARATOR_S,
1383                                   folder->account->recv_server,
1384                                   G_DIR_SEPARATOR_S,
1385                                   folder->account->userid,
1386                                   NULL);
1387
1388         return folder_path;
1389 }
1390
1391 static gchar *imap_item_get_path(Folder *folder, FolderItem *item)
1392 {
1393         gchar *folder_path, *path;
1394
1395         g_return_val_if_fail(folder != NULL, NULL);
1396         g_return_val_if_fail(item != NULL, NULL);
1397         folder_path = imap_folder_get_path(folder);
1398
1399         g_return_val_if_fail(folder_path != NULL, NULL);
1400         if (folder_path[0] == G_DIR_SEPARATOR) {
1401                 if (item->path)
1402                         path = g_strconcat(folder_path, G_DIR_SEPARATOR_S,
1403                                            item->path, NULL);
1404                 else
1405                         path = g_strdup(folder_path);
1406         } else {
1407                 if (item->path)
1408                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
1409                                            folder_path, G_DIR_SEPARATOR_S,
1410                                            item->path, NULL);
1411                 else
1412                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
1413                                            folder_path, NULL);
1414         }
1415         g_free(folder_path);
1416
1417         return path;
1418 }
1419
1420 FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
1421                                const gchar *name)
1422 {
1423         gchar *dirpath, *imap_path;
1424         IMAPSession *session;
1425         FolderItem *new_item;
1426         gchar separator;
1427         gchar *new_name;
1428         const gchar *p;
1429         gint ok;
1430
1431         g_return_val_if_fail(folder != NULL, NULL);
1432         g_return_val_if_fail(folder->account != NULL, NULL);
1433         g_return_val_if_fail(parent != NULL, NULL);
1434         g_return_val_if_fail(name != NULL, NULL);
1435
1436         session = imap_session_get(folder);
1437         if (!session) return NULL;
1438
1439         if (!parent->parent && strcmp(name, "INBOX") == 0)
1440                 dirpath = g_strdup(name);
1441         else if (parent->path)
1442                 dirpath = g_strconcat(parent->path, "/", name, NULL);
1443         else if ((p = strchr(name, '/')) != NULL && *(p + 1) != '\0')
1444                 dirpath = g_strdup(name);
1445         else if (folder->account->imap_dir && *folder->account->imap_dir) {
1446                 gchar *imap_dir;
1447
1448                 Xstrdup_a(imap_dir, folder->account->imap_dir, return NULL);
1449                 strtailchomp(imap_dir, '/');
1450                 dirpath = g_strconcat(imap_dir, "/", name, NULL);
1451         } else
1452                 dirpath = g_strdup(name);
1453
1454         /* keep trailing directory separator to create a folder that contains
1455            sub folder */
1456         imap_path = imap_locale_to_modified_utf7(dirpath);
1457         strtailchomp(dirpath, '/');
1458         Xstrdup_a(new_name, name, {g_free(dirpath); return NULL;});
1459         strtailchomp(new_name, '/');
1460         separator = imap_get_path_separator(IMAP_FOLDER(folder), imap_path);
1461         imap_path_separator_subst(imap_path, separator);
1462         subst_char(new_name, '/', separator);
1463
1464         if (strcmp(name, "INBOX") != 0) {
1465                 GPtrArray *argbuf;
1466                 gint i;
1467                 gboolean exist = FALSE;
1468
1469                 argbuf = g_ptr_array_new();
1470                 ok = imap_cmd_list(session, NULL, imap_path,
1471                                    argbuf);
1472                 if (ok != IMAP_SUCCESS) {
1473                         log_warning(_("can't create mailbox: LIST failed\n"));
1474                         g_free(imap_path);
1475                         g_free(dirpath);
1476                         ptr_array_free_strings(argbuf);
1477                         g_ptr_array_free(argbuf, TRUE);
1478                         return NULL;
1479                 }
1480
1481                 for (i = 0; i < argbuf->len; i++) {
1482                         gchar *str;
1483                         str = g_ptr_array_index(argbuf, i);
1484                         if (!strncmp(str, "LIST ", 5)) {
1485                                 exist = TRUE;
1486                                 break;
1487                         }
1488                 }
1489                 ptr_array_free_strings(argbuf);
1490                 g_ptr_array_free(argbuf, TRUE);
1491
1492                 if (!exist) {
1493                         ok = imap_cmd_create(session, imap_path);
1494                         if (ok != IMAP_SUCCESS) {
1495                                 log_warning(_("can't create mailbox\n"));
1496                                 g_free(imap_path);
1497                                 g_free(dirpath);
1498                                 return NULL;
1499                         }
1500                 }
1501         }
1502
1503         new_item = folder_item_new(folder, new_name, dirpath);
1504         folder_item_append(parent, new_item);
1505         g_free(imap_path);
1506         g_free(dirpath);
1507
1508         dirpath = folder_item_get_path(new_item);
1509         if (!is_dir_exist(dirpath))
1510                 make_dir_hier(dirpath);
1511         g_free(dirpath);
1512
1513         return new_item;
1514 }
1515
1516 gint imap_rename_folder(Folder *folder, FolderItem *item, const gchar *name)
1517 {
1518         gchar *dirpath;
1519         gchar *newpath;
1520         gchar *real_oldpath;
1521         gchar *real_newpath;
1522         GNode *node;
1523         gchar *paths[2];
1524         gchar *old_cache_dir;
1525         gchar *new_cache_dir;
1526         IMAPSession *session;
1527         gchar separator;
1528         gint ok;
1529         gint exists, recent, unseen;
1530         guint32 uid_validity;
1531
1532         g_return_val_if_fail(folder != NULL, -1);
1533         g_return_val_if_fail(item != NULL, -1);
1534         g_return_val_if_fail(item->path != NULL, -1);
1535         g_return_val_if_fail(name != NULL, -1);
1536
1537         session = imap_session_get(folder);
1538         if (!session) return -1;
1539
1540         real_oldpath = imap_get_real_path(IMAP_FOLDER(folder), item->path);
1541
1542         g_free(session->mbox);
1543         session->mbox = NULL;
1544         ok = imap_cmd_examine(session, "INBOX",
1545                               &exists, &recent, &unseen, &uid_validity);
1546         if (ok != IMAP_SUCCESS) {
1547                 g_free(real_oldpath);
1548                 return -1;
1549         }
1550
1551         separator = imap_get_path_separator(IMAP_FOLDER(folder), item->path);
1552         if (strchr(item->path, G_DIR_SEPARATOR)) {
1553                 dirpath = g_dirname(item->path);
1554                 newpath = g_strconcat(dirpath, G_DIR_SEPARATOR_S, name, NULL);
1555                 g_free(dirpath);
1556         } else
1557                 newpath = g_strdup(name);
1558
1559         real_newpath = imap_locale_to_modified_utf7(newpath);
1560         imap_path_separator_subst(real_newpath, separator);
1561
1562         ok = imap_cmd_rename(session, real_oldpath, real_newpath);
1563         if (ok != IMAP_SUCCESS) {
1564                 log_warning(_("can't rename mailbox: %s to %s\n"),
1565                             real_oldpath, real_newpath);
1566                 g_free(real_oldpath);
1567                 g_free(newpath);
1568                 g_free(real_newpath);
1569                 return -1;
1570         }
1571
1572         g_free(item->name);
1573         item->name = g_strdup(name);
1574
1575         old_cache_dir = folder_item_get_path(item);
1576
1577         node = g_node_find(item->folder->node, G_PRE_ORDER, G_TRAVERSE_ALL,
1578                            item);
1579         paths[0] = g_strdup(item->path);
1580         paths[1] = newpath;
1581         g_node_traverse(node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
1582                         imap_rename_folder_func, paths);
1583
1584         if (is_dir_exist(old_cache_dir)) {
1585                 new_cache_dir = folder_item_get_path(item);
1586                 if (rename(old_cache_dir, new_cache_dir) < 0) {
1587                         FILE_OP_ERROR(old_cache_dir, "rename");
1588                 }
1589                 g_free(new_cache_dir);
1590         }
1591
1592         g_free(old_cache_dir);
1593         g_free(paths[0]);
1594         g_free(newpath);
1595         g_free(real_oldpath);
1596         g_free(real_newpath);
1597
1598         return 0;
1599 }
1600
1601 gint imap_remove_folder(Folder *folder, FolderItem *item)
1602 {
1603         gint ok;
1604         IMAPSession *session;
1605         gchar *path;
1606         gchar *cache_dir;
1607         gint exists, recent, unseen;
1608         guint32 uid_validity;
1609
1610         g_return_val_if_fail(folder != NULL, -1);
1611         g_return_val_if_fail(item != NULL, -1);
1612         g_return_val_if_fail(item->path != NULL, -1);
1613
1614         session = imap_session_get(folder);
1615         if (!session) return -1;
1616
1617         path = imap_get_real_path(IMAP_FOLDER(folder), item->path);
1618
1619         ok = imap_cmd_examine(session, "INBOX",
1620                               &exists, &recent, &unseen, &uid_validity);
1621         if (ok != IMAP_SUCCESS) {
1622                 g_free(path);
1623                 return -1;
1624         }
1625
1626         ok = imap_cmd_delete(session, path);
1627         if (ok != IMAP_SUCCESS) {
1628                 log_warning(_("can't delete mailbox\n"));
1629                 g_free(path);
1630                 return -1;
1631         }
1632
1633         g_free(path);
1634         cache_dir = folder_item_get_path(item);
1635         if (is_dir_exist(cache_dir) && remove_dir_recursive(cache_dir) < 0)
1636                 g_warning("can't remove directory '%s'\n", cache_dir);
1637         g_free(cache_dir);
1638         folder_item_remove(item);
1639
1640         return 0;
1641 }
1642
1643 static GSList *imap_get_uncached_messages(IMAPSession *session,
1644                                           FolderItem *item,
1645                                           MsgNumberList *numlist)
1646 {
1647         gchar *tmp;
1648         GSList *newlist = NULL;
1649         GSList *llast = NULL;
1650         GString *str;
1651         MsgInfo *msginfo;
1652         GSList *seq_list, *cur;
1653         IMAPSet imapset;
1654
1655         g_return_val_if_fail(session != NULL, NULL);
1656         g_return_val_if_fail(item != NULL, NULL);
1657         g_return_val_if_fail(item->folder != NULL, NULL);
1658         g_return_val_if_fail(FOLDER_CLASS(item->folder) == &imap_class, NULL);
1659
1660         seq_list = imap_get_seq_set_from_numlist(numlist);
1661         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
1662                 imapset = cur->data;
1663
1664                 if (imap_cmd_envelope(session, imapset)
1665                     != IMAP_SUCCESS) {
1666                         log_warning(_("can't get envelope\n"));
1667                         continue;
1668                 }
1669
1670                 str = g_string_new(NULL);
1671
1672                 for (;;) {
1673                         if ((tmp = sock_getline(SESSION(session)->sock)) == NULL) {
1674                                 log_warning(_("error occurred while getting envelope.\n"));
1675                                 g_string_free(str, TRUE);
1676                                 break;
1677                         }
1678                         strretchomp(tmp);
1679                         if (tmp[0] != '*' || tmp[1] != ' ') {
1680                                 log_print("IMAP4< %s\n", tmp);
1681                                 g_free(tmp);
1682                                 break;
1683                         }
1684                         if (strstr(tmp, "FETCH") == NULL) {
1685                                 log_print("IMAP4< %s\n", tmp);
1686                                 g_free(tmp);
1687                                 continue;
1688                         }
1689                         log_print("IMAP4< %s\n", tmp);
1690                         g_string_assign(str, tmp);
1691                         g_free(tmp);
1692
1693                         msginfo = imap_parse_envelope
1694                                 (SESSION(session)->sock, item, str);
1695                         if (!msginfo) {
1696                                 log_warning(_("can't parse envelope: %s\n"), str->str);
1697                                 continue;
1698                         }
1699                         if (item->stype == F_QUEUE) {
1700                                 MSG_SET_TMP_FLAGS(msginfo->flags, MSG_QUEUED);
1701                         } else if (item->stype == F_DRAFT) {
1702                                 MSG_SET_TMP_FLAGS(msginfo->flags, MSG_DRAFT);
1703                         }
1704
1705                         msginfo->folder = item;
1706
1707                         if (!newlist)
1708                                 llast = newlist = g_slist_append(newlist, msginfo);
1709                         else {
1710                                 llast = g_slist_append(llast, msginfo);
1711                                 llast = llast->next;
1712                         }
1713                 }
1714
1715                 g_string_free(str, TRUE);
1716         }
1717         imap_seq_set_free(seq_list);
1718
1719         return newlist;
1720 }
1721
1722 static void imap_delete_all_cached_messages(FolderItem *item)
1723 {
1724         gchar *dir;
1725
1726         g_return_if_fail(item != NULL);
1727         g_return_if_fail(item->folder != NULL);
1728         g_return_if_fail(FOLDER_CLASS(item->folder) == &imap_class);
1729
1730         debug_print("Deleting all cached messages...\n");
1731
1732         dir = folder_item_get_path(item);
1733         if (is_dir_exist(dir))
1734                 remove_all_numbered_files(dir);
1735         g_free(dir);
1736
1737         debug_print("done.\n");
1738 }
1739
1740 #if USE_OPENSSL
1741 static SockInfo *imap_open_tunnel(const gchar *server,
1742                            const gchar *tunnelcmd,
1743                            SSLType ssl_type)
1744 #else
1745 static SockInfo *imap_open_tunnel(const gchar *server,
1746                            const gchar *tunnelcmd)
1747 #endif
1748 {
1749         SockInfo *sock;
1750
1751         if ((sock = sock_connect_cmd(server, tunnelcmd)) == NULL) {
1752                 log_warning(_("Can't establish IMAP4 session with: %s\n"),
1753                             server);
1754                 return NULL;
1755         }
1756 #if USE_OPENSSL
1757         return imap_init_sock(sock, ssl_type);
1758 #else
1759         return imap_init_sock(sock);
1760 #endif
1761 }
1762
1763
1764 #if USE_OPENSSL
1765 static SockInfo *imap_open(const gchar *server, gushort port,
1766                            SSLType ssl_type)
1767 #else
1768 static SockInfo *imap_open(const gchar *server, gushort port)
1769 #endif
1770 {
1771         SockInfo *sock;
1772
1773         if ((sock = sock_connect(server, port)) == NULL) {
1774                 log_warning(_("Can't connect to IMAP4 server: %s:%d\n"),
1775                             server, port);
1776                 return NULL;
1777         }
1778
1779 #if USE_OPENSSL
1780         if (ssl_type == SSL_TUNNEL && !ssl_init_socket(sock)) {
1781                 log_warning(_("Can't establish IMAP4 session with: %s:%d\n"),
1782                             server, port);
1783                 sock_close(sock);
1784                 return NULL;
1785         }
1786 #endif
1787         return sock;
1788 }
1789
1790 #if USE_OPENSSL
1791 static SockInfo *imap_init_sock(SockInfo *sock, SSLType ssl_type)
1792 #else
1793 static SockInfo *imap_init_sock(SockInfo *sock)
1794 #endif
1795 {
1796
1797         return sock;
1798 }
1799
1800 static GList *imap_parse_namespace_str(gchar *str)
1801 {
1802         gchar *p = str;
1803         gchar *name;
1804         gchar *separator;
1805         IMAPNameSpace *namespace;
1806         GList *ns_list = NULL;
1807
1808         while (*p != '\0') {
1809                 /* parse ("#foo" "/") */
1810
1811                 while (*p && *p != '(') p++;
1812                 if (*p == '\0') break;
1813                 p++;
1814
1815                 while (*p && *p != '"') p++;
1816                 if (*p == '\0') break;
1817                 p++;
1818                 name = p;
1819
1820                 while (*p && *p != '"') p++;
1821                 if (*p == '\0') break;
1822                 *p = '\0';
1823                 p++;
1824
1825                 while (*p && isspace(*p)) p++;
1826                 if (*p == '\0') break;
1827                 if (strncmp(p, "NIL", 3) == 0)
1828                         separator = NULL;
1829                 else if (*p == '"') {
1830                         p++;
1831                         separator = p;
1832                         while (*p && *p != '"') p++;
1833                         if (*p == '\0') break;
1834                         *p = '\0';
1835                         p++;
1836                 } else break;
1837
1838                 while (*p && *p != ')') p++;
1839                 if (*p == '\0') break;
1840                 p++;
1841
1842                 namespace = g_new(IMAPNameSpace, 1);
1843                 namespace->name = g_strdup(name);
1844                 namespace->separator = separator ? separator[0] : '\0';
1845                 ns_list = g_list_append(ns_list, namespace);
1846         }
1847
1848         return ns_list;
1849 }
1850
1851 static void imap_parse_namespace(IMAPSession *session, IMAPFolder *folder)
1852 {
1853         gchar *ns_str;
1854         gchar **str_array;
1855
1856         g_return_if_fail(session != NULL);
1857         g_return_if_fail(folder != NULL);
1858
1859         if (folder->ns_personal != NULL ||
1860             folder->ns_others   != NULL ||
1861             folder->ns_shared   != NULL)
1862                 return;
1863
1864         if (!imap_has_capability(session, "NAMESPACE")) {
1865                 imap_get_namespace_by_list(session, folder);
1866                 return;
1867         }
1868
1869         if (imap_cmd_namespace(session, &ns_str)
1870             != IMAP_SUCCESS) {
1871                 log_warning(_("can't get namespace\n"));
1872                 return;
1873         }
1874
1875         str_array = strsplit_parenthesis(ns_str, '(', ')', 3);
1876         if (str_array == NULL) {
1877                 g_free(ns_str);
1878                 imap_get_namespace_by_list(session, folder);
1879                 return;
1880         }
1881         if (str_array[0])
1882                 folder->ns_personal = imap_parse_namespace_str(str_array[0]);
1883         if (str_array[0] && str_array[1])
1884                 folder->ns_others = imap_parse_namespace_str(str_array[1]);
1885         if (str_array[0] && str_array[1] && str_array[2])
1886                 folder->ns_shared = imap_parse_namespace_str(str_array[2]);
1887         g_strfreev(str_array);
1888         g_free(ns_str);
1889 }
1890
1891 static void imap_get_namespace_by_list(IMAPSession *session, IMAPFolder *folder)
1892 {
1893         GSList *item_list, *cur;
1894         gchar separator = '\0';
1895         IMAPNameSpace *namespace;
1896
1897         g_return_if_fail(session != NULL);
1898         g_return_if_fail(folder != NULL);
1899
1900         if (folder->ns_personal != NULL ||
1901             folder->ns_others   != NULL ||
1902             folder->ns_shared   != NULL)
1903                 return;
1904
1905         imap_gen_send(session, "LIST \"\" \"\"");
1906         item_list = imap_parse_list(folder, session, "", &separator);
1907         for (cur = item_list; cur != NULL; cur = cur->next)
1908                 folder_item_destroy(FOLDER_ITEM(cur->data));
1909         g_slist_free(item_list);
1910
1911         namespace = g_new(IMAPNameSpace, 1);
1912         namespace->name = g_strdup("");
1913         namespace->separator = separator;
1914         folder->ns_personal = g_list_append(NULL, namespace);
1915 }
1916
1917 static IMAPNameSpace *imap_find_namespace_from_list(GList *ns_list,
1918                                                     const gchar *path)
1919 {
1920         IMAPNameSpace *namespace = NULL;
1921         gchar *tmp_path, *name;
1922
1923         if (!path) path = "";
1924
1925         Xstrcat_a(tmp_path, path, "/", return NULL);
1926
1927         for (; ns_list != NULL; ns_list = ns_list->next) {
1928                 IMAPNameSpace *tmp_ns = ns_list->data;
1929
1930                 Xstrdup_a(name, tmp_ns->name, return namespace);
1931                 if (tmp_ns->separator && tmp_ns->separator != '/')
1932                         subst_char(name, tmp_ns->separator, '/');
1933                 if (strncmp(tmp_path, name, strlen(name)) == 0)
1934                         namespace = tmp_ns;
1935         }
1936
1937         return namespace;
1938 }
1939
1940 static IMAPNameSpace *imap_find_namespace(IMAPFolder *folder,
1941                                           const gchar *path)
1942 {
1943         IMAPNameSpace *namespace;
1944
1945         g_return_val_if_fail(folder != NULL, NULL);
1946
1947         namespace = imap_find_namespace_from_list(folder->ns_personal, path);
1948         if (namespace) return namespace;
1949         namespace = imap_find_namespace_from_list(folder->ns_others, path);
1950         if (namespace) return namespace;
1951         namespace = imap_find_namespace_from_list(folder->ns_shared, path);
1952         if (namespace) return namespace;
1953
1954         return NULL;
1955 }
1956
1957 static gchar imap_get_path_separator(IMAPFolder *folder, const gchar *path)
1958 {
1959         IMAPNameSpace *namespace;
1960         gchar separator = '/';
1961
1962         namespace = imap_find_namespace(folder, path);
1963         if (namespace && namespace->separator)
1964                 separator = namespace->separator;
1965
1966         return separator;
1967 }
1968
1969 static gchar *imap_get_real_path(IMAPFolder *folder, const gchar *path)
1970 {
1971         gchar *real_path;
1972         gchar separator;
1973
1974         g_return_val_if_fail(folder != NULL, NULL);
1975         g_return_val_if_fail(path != NULL, NULL);
1976
1977         real_path = imap_locale_to_modified_utf7(path);
1978         separator = imap_get_path_separator(folder, path);
1979         imap_path_separator_subst(real_path, separator);
1980
1981         return real_path;
1982 }
1983
1984 static gchar *imap_parse_atom(SockInfo *sock, gchar *src,
1985                               gchar *dest, gint dest_len, GString *str)
1986 {
1987         gchar *cur_pos = src;
1988         gchar *nextline;
1989
1990         g_return_val_if_fail(str != NULL, cur_pos);
1991
1992         /* read the next line if the current response buffer is empty */
1993         while (isspace(*cur_pos)) cur_pos++;
1994         while (*cur_pos == '\0') {
1995                 if ((nextline = sock_getline(sock)) == NULL)
1996                         return cur_pos;
1997                 g_string_assign(str, nextline);
1998                 cur_pos = str->str;
1999                 strretchomp(nextline);
2000                 /* log_print("IMAP4< %s\n", nextline); */
2001                 debug_print("IMAP4< %s\n", nextline);
2002                 g_free(nextline);
2003
2004                 while (isspace(*cur_pos)) cur_pos++;
2005         }
2006
2007         if (!strncmp(cur_pos, "NIL", 3)) {
2008                 *dest = '\0';
2009                 cur_pos += 3;
2010         } else if (*cur_pos == '\"') {
2011                 gchar *p;
2012
2013                 p = get_quoted(cur_pos, '\"', dest, dest_len);
2014                 cur_pos = p ? p : cur_pos + 2;
2015         } else if (*cur_pos == '{') {
2016                 gchar buf[32];
2017                 gint len;
2018                 gint line_len = 0;
2019
2020                 cur_pos = strchr_cpy(cur_pos + 1, '}', buf, sizeof(buf));
2021                 len = atoi(buf);
2022                 g_return_val_if_fail(len > 0, cur_pos);
2023
2024                 g_string_truncate(str, 0);
2025                 cur_pos = str->str;
2026
2027                 do {
2028                         if ((nextline = sock_getline(sock)) == NULL)
2029                                 return cur_pos;
2030                         line_len += strlen(nextline);
2031                         g_string_append(str, nextline);
2032                         cur_pos = str->str;
2033                         strretchomp(nextline);
2034                         /* log_print("IMAP4< %s\n", nextline); */
2035                         debug_print("IMAP4< %s\n", nextline);
2036                         g_free(nextline);
2037                 } while (line_len < len);
2038
2039                 memcpy(dest, cur_pos, MIN(len, dest_len - 1));
2040                 dest[MIN(len, dest_len - 1)] = '\0';
2041                 cur_pos += len;
2042         }
2043
2044         return cur_pos;
2045 }
2046
2047 static gchar *imap_get_header(SockInfo *sock, gchar *cur_pos, gchar **headers,
2048                               GString *str)
2049 {
2050         gchar *nextline;
2051         gchar buf[32];
2052         gint len;
2053         gint block_len = 0;
2054
2055         *headers = NULL;
2056
2057         g_return_val_if_fail(str != NULL, cur_pos);
2058
2059         while (isspace(*cur_pos)) cur_pos++;
2060
2061         g_return_val_if_fail(*cur_pos == '{', cur_pos);
2062
2063         cur_pos = strchr_cpy(cur_pos + 1, '}', buf, sizeof(buf));
2064         len = atoi(buf);
2065         g_return_val_if_fail(len > 0, cur_pos);
2066
2067         g_string_truncate(str, 0);
2068         cur_pos = str->str;
2069
2070         do {
2071                 if ((nextline = sock_getline(sock)) == NULL)
2072                         return cur_pos;
2073                 block_len += strlen(nextline);
2074                 g_string_append(str, nextline);
2075                 cur_pos = str->str;
2076                 strretchomp(nextline);
2077                 /* debug_print("IMAP4< %s\n", nextline); */
2078                 g_free(nextline);
2079         } while (block_len < len);
2080
2081         debug_print("IMAP4< [contents of BODY.PEEK[HEADER.FIELDS (...)]]\n");
2082
2083         *headers = g_strndup(cur_pos, len);
2084         cur_pos += len;
2085
2086         while (isspace(*cur_pos)) cur_pos++;
2087         while (*cur_pos == '\0') {
2088                 if ((nextline = sock_getline(sock)) == NULL)
2089                         return cur_pos;
2090                 g_string_assign(str, nextline);
2091                 cur_pos = str->str;
2092                 strretchomp(nextline);
2093                 debug_print("IMAP4< %s\n", nextline);
2094                 g_free(nextline);
2095
2096                 while (isspace(*cur_pos)) cur_pos++;
2097         }
2098
2099         return cur_pos;
2100 }
2101
2102 static MsgFlags imap_parse_flags(const gchar *flag_str)
2103 {
2104         const gchar *p = flag_str;
2105         MsgFlags flags = {0, 0};
2106
2107         flags.perm_flags = MSG_UNREAD;
2108
2109         while ((p = strchr(p, '\\')) != NULL) {
2110                 p++;
2111
2112                 if (g_strncasecmp(p, "Recent", 6) == 0 && MSG_IS_UNREAD(flags)) {
2113                         MSG_SET_PERM_FLAGS(flags, MSG_NEW);
2114                 } else if (g_strncasecmp(p, "Seen", 4) == 0) {
2115                         MSG_UNSET_PERM_FLAGS(flags, MSG_NEW|MSG_UNREAD);
2116                 } else if (g_strncasecmp(p, "Deleted", 7) == 0) {
2117                         MSG_SET_PERM_FLAGS(flags, MSG_DELETED);
2118                 } else if (g_strncasecmp(p, "Flagged", 7) == 0) {
2119                         MSG_SET_PERM_FLAGS(flags, MSG_MARKED);
2120                 } else if (g_strncasecmp(p, "Answered", 8) == 0) {
2121                         MSG_SET_PERM_FLAGS(flags, MSG_REPLIED);
2122                 }
2123         }
2124
2125         return flags;
2126 }
2127
2128 static MsgInfo *imap_parse_envelope(SockInfo *sock, FolderItem *item,
2129                                     GString *line_str)
2130 {
2131         gchar buf[IMAPBUFSIZE];
2132         MsgInfo *msginfo = NULL;
2133         gchar *cur_pos;
2134         gint msgnum;
2135         guint32 uid = 0;
2136         size_t size = 0;
2137         MsgFlags flags = {0, 0}, imap_flags = {0, 0};
2138
2139         g_return_val_if_fail(line_str != NULL, NULL);
2140         g_return_val_if_fail(line_str->str[0] == '*' &&
2141                              line_str->str[1] == ' ', NULL);
2142
2143         MSG_SET_TMP_FLAGS(flags, MSG_IMAP);
2144         if (item->stype == F_QUEUE) {
2145                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
2146         } else if (item->stype == F_DRAFT) {
2147                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
2148         }
2149
2150         cur_pos = line_str->str + 2;
2151
2152 #define PARSE_ONE_ELEMENT(ch)                                   \
2153 {                                                               \
2154         cur_pos = strchr_cpy(cur_pos, ch, buf, sizeof(buf));    \
2155         if (cur_pos == NULL) {                                  \
2156                 g_warning("cur_pos == NULL\n");                 \
2157                 procmsg_msginfo_free(msginfo);                  \
2158                 return NULL;                                    \
2159         }                                                       \
2160 }
2161
2162         PARSE_ONE_ELEMENT(' ');
2163         msgnum = atoi(buf);
2164
2165         PARSE_ONE_ELEMENT(' ');
2166         g_return_val_if_fail(!strcmp(buf, "FETCH"), NULL);
2167
2168         g_return_val_if_fail(*cur_pos == '(', NULL);
2169         cur_pos++;
2170
2171         while (*cur_pos != '\0' && *cur_pos != ')') {
2172                 while (*cur_pos == ' ') cur_pos++;
2173
2174                 if (!strncmp(cur_pos, "UID ", 4)) {
2175                         cur_pos += 4;
2176                         uid = strtoul(cur_pos, &cur_pos, 10);
2177                 } else if (!strncmp(cur_pos, "FLAGS ", 6)) {
2178                         cur_pos += 6;
2179                         if (*cur_pos != '(') {
2180                                 g_warning("*cur_pos != '('\n");
2181                                 procmsg_msginfo_free(msginfo);
2182                                 return NULL;
2183                         }
2184                         cur_pos++;
2185                         PARSE_ONE_ELEMENT(')');
2186                         imap_flags = imap_parse_flags(buf);
2187                 } else if (!strncmp(cur_pos, "RFC822.SIZE ", 12)) {
2188                         cur_pos += 12;
2189                         size = strtol(cur_pos, &cur_pos, 10);
2190                 } else if (!strncmp(cur_pos, "BODY[HEADER.FIELDS ", 19)) {
2191                         gchar *headers;
2192
2193                         cur_pos += 19;
2194                         if (*cur_pos != '(') {
2195                                 g_warning("*cur_pos != '('\n");
2196                                 procmsg_msginfo_free(msginfo);
2197                                 return NULL;
2198                         }
2199                         cur_pos++;
2200                         PARSE_ONE_ELEMENT(')');
2201                         if (*cur_pos != ']') {
2202                                 g_warning("*cur_pos != ']'\n");
2203                                 procmsg_msginfo_free(msginfo);
2204                                 return NULL;
2205                         }
2206                         cur_pos++;
2207
2208                         cur_pos = imap_get_header(sock, cur_pos, &headers,
2209                                                   line_str);
2210                         msginfo = procheader_parse_str(headers, flags, FALSE, FALSE);
2211                         g_free(headers);
2212                 } else {
2213                         g_warning("invalid FETCH response: %s\n", cur_pos);
2214                         break;
2215                 }
2216         }
2217
2218         if (msginfo) {
2219                 msginfo->msgnum = uid;
2220                 msginfo->size = size;
2221                 msginfo->flags.tmp_flags |= imap_flags.tmp_flags;
2222                 msginfo->flags.perm_flags = imap_flags.perm_flags;
2223         }
2224
2225         return msginfo;
2226 }
2227
2228 static gchar *imap_get_flag_str(IMAPFlags flags)
2229 {
2230         GString *str;
2231         gchar *ret;
2232
2233         str = g_string_new(NULL);
2234
2235         if (IMAP_IS_SEEN(flags))        g_string_append(str, "\\Seen ");
2236         if (IMAP_IS_ANSWERED(flags))    g_string_append(str, "\\Answered ");
2237         if (IMAP_IS_FLAGGED(flags))     g_string_append(str, "\\Flagged ");
2238         if (IMAP_IS_DELETED(flags))     g_string_append(str, "\\Deleted ");
2239         if (IMAP_IS_DRAFT(flags))       g_string_append(str, "\\Draft");
2240
2241         if (str->len > 0 && str->str[str->len - 1] == ' ')
2242                 g_string_truncate(str, str->len - 1);
2243
2244         ret = str->str;
2245         g_string_free(str, FALSE);
2246
2247         return ret;
2248 }
2249
2250 static gint imap_set_message_flags(IMAPSession *session,
2251                                    MsgNumberList *numlist,
2252                                    IMAPFlags flags,
2253                                    gboolean is_set)
2254 {
2255         gchar *cmd;
2256         gchar *flag_str;
2257         gint ok;
2258         GSList *seq_list, *cur;
2259         IMAPSet imapset;
2260
2261         flag_str = imap_get_flag_str(flags);
2262         cmd = g_strconcat(is_set ? "+FLAGS.SILENT (" : "-FLAGS.SILENT (",
2263                           flag_str, ")", NULL);
2264         g_free(flag_str);
2265
2266         seq_list = imap_get_seq_set_from_numlist(numlist);
2267         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
2268                 imapset = cur->data;
2269
2270                 ok = imap_cmd_store(session, imapset, cmd);
2271         }
2272         imap_seq_set_free(seq_list);
2273         g_free(cmd);
2274
2275         return ok;
2276 }
2277
2278 static gint imap_select(IMAPSession *session, IMAPFolder *folder,
2279                         const gchar *path,
2280                         gint *exists, gint *recent, gint *unseen,
2281                         guint32 *uid_validity)
2282 {
2283         gchar *real_path;
2284         gint ok;
2285         gint exists_, recent_, unseen_, uid_validity_;
2286
2287         if (!exists || !recent || !unseen || !uid_validity) {
2288                 if (session->mbox && strcmp(session->mbox, path) == 0)
2289                         return IMAP_SUCCESS;
2290                 exists = &exists_;
2291                 recent = &recent_;
2292                 unseen = &unseen_;
2293                 uid_validity = &uid_validity_;
2294         }
2295
2296         g_free(session->mbox);
2297         session->mbox = NULL;
2298
2299         real_path = imap_get_real_path(folder, path);
2300         ok = imap_cmd_select(session, real_path,
2301                              exists, recent, unseen, uid_validity);
2302         if (ok != IMAP_SUCCESS)
2303                 log_warning(_("can't select folder: %s\n"), real_path);
2304         else {
2305                 session->mbox = g_strdup(path);
2306                 session->folder_content_changed = FALSE;
2307         }
2308         g_free(real_path);
2309
2310         return ok;
2311 }
2312
2313 #define THROW(err) { ok = err; goto catch; }
2314
2315 static gint imap_status(IMAPSession *session, IMAPFolder *folder,
2316                         const gchar *path,
2317                         gint *messages, gint *recent,
2318                         guint32 *uid_next, guint32 *uid_validity,
2319                         gint *unseen)
2320 {
2321         gchar *real_path;
2322         gchar *real_path_;
2323         gint ok;
2324         GPtrArray *argbuf;
2325         gchar *str;
2326
2327         *messages = *recent = *uid_next = *uid_validity = *unseen = 0;
2328
2329         argbuf = g_ptr_array_new();
2330
2331         real_path = imap_get_real_path(folder, path);
2332         QUOTE_IF_REQUIRED(real_path_, real_path);
2333         imap_gen_send(session, "STATUS %s "
2334                       "(MESSAGES RECENT UIDNEXT UIDVALIDITY UNSEEN)",
2335                       real_path_);
2336
2337         ok = imap_cmd_ok(session, argbuf);
2338         if (ok != IMAP_SUCCESS) THROW(ok);
2339
2340         str = search_array_str(argbuf, "STATUS");
2341         if (!str) THROW(IMAP_ERROR);
2342
2343         str = strchr(str, '(');
2344         if (!str) THROW(IMAP_ERROR);
2345         str++;
2346         while (*str != '\0' && *str != ')') {
2347                 while (*str == ' ') str++;
2348
2349                 if (!strncmp(str, "MESSAGES ", 9)) {
2350                         str += 9;
2351                         *messages = strtol(str, &str, 10);
2352                 } else if (!strncmp(str, "RECENT ", 7)) {
2353                         str += 7;
2354                         *recent = strtol(str, &str, 10);
2355                 } else if (!strncmp(str, "UIDNEXT ", 8)) {
2356                         str += 8;
2357                         *uid_next = strtoul(str, &str, 10);
2358                 } else if (!strncmp(str, "UIDVALIDITY ", 12)) {
2359                         str += 12;
2360                         *uid_validity = strtoul(str, &str, 10);
2361                 } else if (!strncmp(str, "UNSEEN ", 7)) {
2362                         str += 7;
2363                         *unseen = strtol(str, &str, 10);
2364                 } else {
2365                         g_warning("invalid STATUS response: %s\n", str);
2366                         break;
2367                 }
2368         }
2369
2370 catch:
2371         g_free(real_path);
2372         ptr_array_free_strings(argbuf);
2373         g_ptr_array_free(argbuf, TRUE);
2374
2375         return ok;
2376 }
2377
2378 #undef THROW
2379
2380
2381 /* low-level IMAP4rev1 commands */
2382
2383 static gint imap_cmd_authenticate(IMAPSession *session, const gchar *user,
2384                                   const gchar *pass, IMAPAuthType type)
2385 {
2386         gchar *auth_type;
2387         gint ok;
2388         gchar *buf = NULL;
2389         gchar *challenge;
2390         gint challenge_len;
2391         gchar hexdigest[33];
2392         gchar *response;
2393         gchar *response64;
2394
2395         auth_type = "CRAM-MD5";
2396
2397         imap_gen_send(session, "AUTHENTICATE %s", auth_type);
2398         ok = imap_gen_recv(session, &buf);
2399         if (ok != IMAP_SUCCESS || buf[0] != '+' || buf[1] != ' ') {
2400                 g_free(buf);
2401                 return IMAP_ERROR;
2402         }
2403
2404         challenge = g_malloc(strlen(buf + 2) + 1);
2405         challenge_len = base64_decode(challenge, buf + 2, -1);
2406         challenge[challenge_len] = '\0';
2407         g_free(buf);
2408         log_print("IMAP< [Decoded: %s]\n", challenge);
2409
2410         md5_hex_hmac(hexdigest, challenge, challenge_len, pass, strlen(pass));
2411         g_free(challenge);
2412
2413         response = g_strdup_printf("%s %s", user, hexdigest);
2414         log_print("IMAP> [Encoded: %s]\n", response);
2415         response64 = g_malloc((strlen(response) + 3) * 2 + 1);
2416         base64_encode(response64, response, strlen(response));
2417         g_free(response);
2418
2419         log_print("IMAP> %s\n", response64);
2420         sock_puts(SESSION(session)->sock, response64);
2421         ok = imap_cmd_ok(session, NULL);
2422         if (ok != IMAP_SUCCESS)
2423                 log_warning(_("IMAP4 authentication failed.\n"));
2424
2425         return ok;
2426 }
2427
2428 static gint imap_cmd_login(IMAPSession *session,
2429                            const gchar *user, const gchar *pass)
2430 {
2431         gchar *user_, *pass_;
2432         gint ok;
2433
2434         QUOTE_IF_REQUIRED(user_, user);
2435         QUOTE_IF_REQUIRED(pass_, pass);
2436         imap_gen_send(session, "LOGIN %s %s", user_, pass_);
2437
2438         ok = imap_cmd_ok(session, NULL);
2439         if (ok != IMAP_SUCCESS)
2440                 log_warning(_("IMAP4 login failed.\n"));
2441
2442         return ok;
2443 }
2444
2445 static gint imap_cmd_logout(IMAPSession *session)
2446 {
2447         imap_gen_send(session, "LOGOUT");
2448         return imap_cmd_ok(session, NULL);
2449 }
2450
2451 /* Send CAPABILITY, and examine the server's response to see whether this
2452  * connection is pre-authenticated or not and build a list of CAPABILITIES. */
2453 static gint imap_greeting(IMAPSession *session)
2454 {
2455         gchar *capstr;
2456         GPtrArray *argbuf;
2457
2458         imap_gen_send(session, "CAPABILITY");
2459
2460         argbuf = g_ptr_array_new();
2461
2462         if (imap_cmd_ok(session, argbuf) != IMAP_SUCCESS ||
2463             ((capstr = search_array_str(argbuf, "CAPABILITY ")) == NULL)) {
2464                 ptr_array_free_strings(argbuf);
2465                 g_ptr_array_free(argbuf, TRUE);
2466                 return -1;
2467         }
2468
2469         session->authenticated = search_array_str(argbuf, "PREAUTH") != NULL;
2470
2471         capstr += strlen("CAPABILITY ");
2472
2473         IMAP_SESSION(session)->capability = g_strsplit(capstr, " ", 0);
2474
2475         ptr_array_free_strings(argbuf);
2476         g_ptr_array_free(argbuf, TRUE);
2477
2478         return 0;
2479 }
2480
2481 static gboolean imap_has_capability(IMAPSession *session, const gchar *cap)
2482 {
2483         gchar **p;
2484
2485         for (p = session->capability; *p != NULL; ++p)
2486                 if (g_strcasecmp(*p, cap) == 0)
2487                         return TRUE;
2488
2489         return FALSE;
2490 }
2491
2492 void imap_free_capabilities(IMAPSession *session)
2493 {
2494         g_strfreev(session->capability);
2495         session->capability = NULL;
2496 }
2497
2498 static gint imap_cmd_noop(IMAPSession *session)
2499 {
2500         imap_gen_send(session, "NOOP");
2501         return imap_cmd_ok(session, NULL);
2502 }
2503
2504 static gint imap_cmd_starttls(IMAPSession *session)
2505 {
2506         imap_gen_send(session, "STARTTLS");
2507         return imap_cmd_ok(session, NULL);
2508 }
2509
2510 #define THROW(err) { ok = err; goto catch; }
2511
2512 static gint imap_cmd_namespace(IMAPSession *session, gchar **ns_str)
2513 {
2514         gint ok;
2515         GPtrArray *argbuf;
2516         gchar *str;
2517
2518         argbuf = g_ptr_array_new();
2519
2520         imap_gen_send(session, "NAMESPACE");
2521         if ((ok = imap_cmd_ok(session, argbuf)) != IMAP_SUCCESS) THROW(ok);
2522
2523         str = search_array_str(argbuf, "NAMESPACE");
2524         if (!str) THROW(IMAP_ERROR);
2525
2526         *ns_str = g_strdup(str);
2527
2528 catch:
2529         ptr_array_free_strings(argbuf);
2530         g_ptr_array_free(argbuf, TRUE);
2531
2532         return ok;
2533 }
2534
2535 #undef THROW
2536
2537 static gint imap_cmd_list(IMAPSession *session, const gchar *ref,
2538                           const gchar *mailbox, GPtrArray *argbuf)
2539 {
2540         gchar *ref_, *mailbox_;
2541
2542         if (!ref) ref = "\"\"";
2543         if (!mailbox) mailbox = "\"\"";
2544
2545         QUOTE_IF_REQUIRED(ref_, ref);
2546         QUOTE_IF_REQUIRED(mailbox_, mailbox);
2547         imap_gen_send(session, "LIST %s %s", ref_, mailbox_);
2548
2549         return imap_cmd_ok(session, argbuf);
2550 }
2551
2552 #define THROW goto catch
2553
2554 static gint imap_cmd_do_select(IMAPSession *session, const gchar *folder,
2555                                gboolean examine,
2556                                gint *exists, gint *recent, gint *unseen,
2557                                guint32 *uid_validity)
2558 {
2559         gint ok;
2560         gchar *resp_str;
2561         GPtrArray *argbuf;
2562         gchar *select_cmd;
2563         gchar *folder_;
2564
2565         *exists = *recent = *unseen = *uid_validity = 0;
2566         argbuf = g_ptr_array_new();
2567
2568         if (examine)
2569                 select_cmd = "EXAMINE";
2570         else
2571                 select_cmd = "SELECT";
2572
2573         QUOTE_IF_REQUIRED(folder_, folder);
2574         imap_gen_send(session, "%s %s", select_cmd, folder_);
2575
2576         if ((ok = imap_cmd_ok(session, argbuf)) != IMAP_SUCCESS) THROW;
2577
2578         resp_str = search_array_contain_str(argbuf, "EXISTS");
2579         if (resp_str) {
2580                 if (sscanf(resp_str,"%d EXISTS", exists) != 1) {
2581                         g_warning("imap_cmd_select(): invalid EXISTS line.\n");
2582                         THROW;
2583                 }
2584         }
2585
2586         resp_str = search_array_contain_str(argbuf, "RECENT");
2587         if (resp_str) {
2588                 if (sscanf(resp_str, "%d RECENT", recent) != 1) {
2589                         g_warning("imap_cmd_select(): invalid RECENT line.\n");
2590                         THROW;
2591                 }
2592         }
2593
2594         resp_str = search_array_contain_str(argbuf, "UIDVALIDITY");
2595         if (resp_str) {
2596                 if (sscanf(resp_str, "OK [UIDVALIDITY %u] ", uid_validity)
2597                     != 1) {
2598                         g_warning("imap_cmd_select(): invalid UIDVALIDITY line.\n");
2599                         THROW;
2600                 }
2601         }
2602
2603         resp_str = search_array_contain_str(argbuf, "UNSEEN");
2604         if (resp_str) {
2605                 if (sscanf(resp_str, "OK [UNSEEN %d] ", unseen) != 1) {
2606                         g_warning("imap_cmd_select(): invalid UNSEEN line.\n");
2607                         THROW;
2608                 }
2609         }
2610
2611 catch:
2612         ptr_array_free_strings(argbuf);
2613         g_ptr_array_free(argbuf, TRUE);
2614
2615         return ok;
2616 }
2617
2618 static gint imap_cmd_select(IMAPSession *session, const gchar *folder,
2619                             gint *exists, gint *recent, gint *unseen,
2620                             guint32 *uid_validity)
2621 {
2622         return imap_cmd_do_select(session, folder, FALSE,
2623                                   exists, recent, unseen, uid_validity);
2624 }
2625
2626 static gint imap_cmd_examine(IMAPSession *session, const gchar *folder,
2627                              gint *exists, gint *recent, gint *unseen,
2628                              guint32 *uid_validity)
2629 {
2630         return imap_cmd_do_select(session, folder, TRUE,
2631                                   exists, recent, unseen, uid_validity);
2632 }
2633
2634 #undef THROW
2635
2636 static gint imap_cmd_create(IMAPSession *session, const gchar *folder)
2637 {
2638         gchar *folder_;
2639
2640         QUOTE_IF_REQUIRED(folder_, folder);
2641         imap_gen_send(session, "CREATE %s", folder_);
2642
2643         return imap_cmd_ok(session, NULL);
2644 }
2645
2646 static gint imap_cmd_rename(IMAPSession *session, const gchar *old_folder,
2647                             const gchar *new_folder)
2648 {
2649         gchar *old_folder_, *new_folder_;
2650
2651         QUOTE_IF_REQUIRED(old_folder_, old_folder);
2652         QUOTE_IF_REQUIRED(new_folder_, new_folder);
2653         imap_gen_send(session, "RENAME %s %s", old_folder_, new_folder_);
2654
2655         return imap_cmd_ok(session, NULL);
2656 }
2657
2658 static gint imap_cmd_delete(IMAPSession *session, const gchar *folder)
2659 {
2660         gchar *folder_;
2661
2662         QUOTE_IF_REQUIRED(folder_, folder);
2663         imap_gen_send(session, "DELETE %s", folder_);
2664
2665         return imap_cmd_ok(session, NULL);
2666 }
2667
2668 static gint imap_cmd_search(IMAPSession *session, const gchar *criteria, GSList **list)
2669 {
2670         gint ok;
2671         gchar *uidlist;
2672         GPtrArray *argbuf;
2673
2674         g_return_val_if_fail(criteria != NULL, IMAP_ERROR);
2675         g_return_val_if_fail(list != NULL, IMAP_ERROR);
2676
2677         *list = NULL;
2678
2679         argbuf = g_ptr_array_new();
2680         imap_gen_send(session, "UID SEARCH %s", criteria);
2681
2682         ok = imap_cmd_ok(session, argbuf);
2683         if (ok != IMAP_SUCCESS) {
2684                 ptr_array_free_strings(argbuf);
2685                 g_ptr_array_free(argbuf, TRUE);
2686                 return ok;
2687         }
2688
2689         if ((uidlist = search_array_str(argbuf, "SEARCH ")) != NULL) {
2690                 gchar **strlist, **p;
2691
2692                 strlist = g_strsplit(uidlist + 7, " ", 0);
2693                 for (p = strlist; *p != NULL; ++p) {
2694                         guint msgnum;
2695
2696                         if (sscanf(*p, "%d", &msgnum) == 1)
2697                                 *list = g_slist_append(*list, GINT_TO_POINTER(msgnum));
2698                 }
2699                 g_strfreev(strlist);
2700         }
2701         ptr_array_free_strings(argbuf);
2702         g_ptr_array_free(argbuf, TRUE);
2703
2704         return IMAP_SUCCESS;
2705 }
2706
2707 static gint imap_cmd_fetch(IMAPSession *session, guint32 uid, const gchar *filename)
2708 {
2709         gint ok;
2710         gchar *buf = NULL;
2711         gchar *cur_pos;
2712         gchar size_str[32];
2713         glong size_num;
2714
2715         g_return_val_if_fail(filename != NULL, IMAP_ERROR);
2716
2717         imap_gen_send(session, "UID FETCH %d BODY.PEEK[]", uid);
2718
2719         while ((ok = imap_gen_recv(session, &buf)) == IMAP_SUCCESS) {
2720                 if (buf[0] != '*' || buf[1] != ' ') {
2721                         g_free(buf);
2722                         return IMAP_ERROR;
2723                 }
2724                 if (strstr(buf, "FETCH") != NULL) break;
2725                 g_free(buf);
2726         }
2727         if (ok != IMAP_SUCCESS) {
2728                 g_free(buf);
2729                 return ok;
2730         }
2731
2732 #define RETURN_ERROR_IF_FAIL(cond)      \
2733         if (!(cond)) {                  \
2734                 g_free(buf);            \
2735                 return IMAP_ERROR;      \
2736         }
2737
2738         cur_pos = strchr(buf, '{');
2739         RETURN_ERROR_IF_FAIL(cur_pos != NULL);
2740         cur_pos = strchr_cpy(cur_pos + 1, '}', size_str, sizeof(size_str));
2741         RETURN_ERROR_IF_FAIL(cur_pos != NULL);
2742         size_num = atol(size_str);
2743         RETURN_ERROR_IF_FAIL(size_num > 0);
2744
2745         RETURN_ERROR_IF_FAIL(*cur_pos == '\0');
2746
2747 #undef RETURN_ERROR_IF_FAIL
2748
2749         g_free(buf);
2750
2751         if (recv_bytes_write_to_file(SESSION(session)->sock, size_num, filename) != 0)
2752                 return IMAP_ERROR;
2753
2754         if (imap_gen_recv(session, &buf) != IMAP_SUCCESS) {
2755                 g_free(buf);
2756                 return IMAP_ERROR;
2757         }
2758
2759         if (buf[0] == '\0' || buf[strlen(buf) - 1] != ')') {
2760                 g_free(buf);
2761                 return IMAP_ERROR;
2762         }
2763         g_free(buf);
2764
2765         ok = imap_cmd_ok(session, NULL);
2766
2767         return ok;
2768 }
2769
2770 static gint imap_cmd_append(IMAPSession *session, const gchar *destfolder,
2771                             const gchar *file, IMAPFlags flags, gint32 *new_uid)
2772 {
2773         gint ok;
2774         gint size, newuid;
2775         gchar *destfolder_;
2776         gchar *flag_str;
2777         gchar *ret = NULL;
2778         gchar buf[BUFFSIZE];
2779         FILE *fp;
2780         GPtrArray *reply;
2781         gchar *okmsginfo;
2782
2783         g_return_val_if_fail(file != NULL, IMAP_ERROR);
2784
2785         size = get_file_size_as_crlf(file);
2786         if ((fp = fopen(file, "rb")) == NULL) {
2787                 FILE_OP_ERROR(file, "fopen");
2788                 return -1;
2789         }
2790         QUOTE_IF_REQUIRED(destfolder_, destfolder);
2791         flag_str = imap_get_flag_str(flags);
2792         imap_gen_send(session, "APPEND %s (%s) {%d}",
2793                       destfolder_, flag_str, size);
2794         g_free(flag_str);
2795
2796         ok = imap_gen_recv(session, &ret);
2797         if (ok != IMAP_SUCCESS || ret[0] != '+' || ret[1] != ' ') {
2798                 log_warning(_("can't append %s to %s\n"), file, destfolder_);
2799                 g_free(ret);
2800                 fclose(fp);
2801                 return IMAP_ERROR;
2802         }
2803         g_free(ret);
2804
2805         log_print("IMAP4> %s\n", _("(sending file...)"));
2806
2807         while (fgets(buf, sizeof(buf), fp) != NULL) {
2808                 strretchomp(buf);
2809                 if (sock_puts(SESSION(session)->sock, buf) < 0) {
2810                         fclose(fp);
2811                         return -1;
2812                 }
2813         }
2814
2815         if (ferror(fp)) {
2816                 FILE_OP_ERROR(file, "fgets");
2817                 fclose(fp);
2818                 return -1;
2819         }
2820
2821         sock_puts(SESSION(session)->sock, "");
2822
2823         fclose(fp);
2824
2825         reply = g_ptr_array_new();
2826
2827         *new_uid = 0;
2828         ok = imap_cmd_ok(session, reply);
2829         if (ok != IMAP_SUCCESS)
2830                 log_warning(_("can't append message to %s\n"), destfolder_);
2831         else if (
2832             (new_uid != NULL) &&
2833             (imap_has_capability(session, "UIDPLUS") && reply->len > 0) &&
2834             ((okmsginfo = g_ptr_array_index(reply, reply->len - 1)) != NULL) &&
2835             (sscanf(okmsginfo, "%*u OK [APPENDUID %*u %u]", &newuid) == 1)) {
2836                 *new_uid = newuid;
2837         }
2838
2839         ptr_array_free_strings(reply);
2840         g_ptr_array_free(reply, TRUE);
2841         return ok;
2842 }
2843
2844 static gint imap_cmd_copy(IMAPSession *session, const gchar *seq_set,
2845                           const gchar *destfolder, GRelation *uid_mapping)
2846 {
2847         gint ok;
2848         gchar *destfolder_;
2849         GPtrArray *reply;
2850
2851         g_return_val_if_fail(session != NULL, IMAP_ERROR);
2852         g_return_val_if_fail(seq_set != NULL, IMAP_ERROR);
2853         g_return_val_if_fail(destfolder != NULL, IMAP_ERROR);
2854
2855         QUOTE_IF_REQUIRED(destfolder_, destfolder);
2856         imap_gen_send(session, "UID COPY %s %s", seq_set, destfolder_);
2857
2858         reply = g_ptr_array_new();
2859
2860         ok = imap_cmd_ok(session, reply);
2861         if (ok != IMAP_SUCCESS)
2862                 log_warning(_("can't copy %s to %s\n"), seq_set, destfolder_);
2863 /*
2864         TODO: UIDPLUS
2865
2866         - split IMAPSets into uids
2867         - g_relation_insert(uid_mapping, olduid, newuid);
2868
2869         else if (imap_has_capability(session, "UIDPLUS") && reply->len > 0)
2870                 if ((okmsginfo = g_ptr_array_index(reply, reply->len - 1)) != NULL &&
2871                     sscanf(okmsginfo, "%*u OK [COPYUID %*u %u %u]", &olduid, &newuid) == 2 &&
2872                     olduid == msgnum)
2873                         *new_uid = newuid;
2874 */
2875         ptr_array_free_strings(reply);
2876         g_ptr_array_free(reply, TRUE);
2877         return ok;
2878 }
2879
2880 gint imap_cmd_envelope(IMAPSession *session, IMAPSet set)
2881 {
2882         static GString *header_fields = NULL;
2883
2884         if (header_fields == NULL) {
2885                 const HeaderEntry *headers, *elem;
2886
2887                 headers = procheader_get_headernames(FALSE);
2888                 header_fields = g_string_new("");
2889
2890                 for (elem = headers; elem->name != NULL; ++elem) {
2891                         gint namelen = strlen(elem->name);
2892
2893                         /* Header fields ending with space are not rfc822 headers */
2894                         if (elem->name[namelen - 1] == ' ')
2895                                 continue;
2896
2897                         /* strip : at the of header field */
2898                         if(elem->name[namelen - 1] == ':')
2899                                 namelen--;
2900
2901                         if (namelen <= 0)
2902                                 continue;
2903
2904                         g_string_sprintfa(header_fields, "%s%.*s",
2905                                         header_fields->str[0] != '\0' ? " " : "",
2906                                         namelen, elem->name);
2907                 }
2908         }
2909
2910         imap_gen_send
2911                 (session, "UID FETCH %s (UID FLAGS RFC822.SIZE BODY.PEEK[HEADER.FIELDS (%s)])",
2912                  set, header_fields->str);
2913
2914         return IMAP_SUCCESS;
2915 }
2916
2917 static gint imap_cmd_store(IMAPSession *session, IMAPSet seq_set,
2918                            gchar *sub_cmd)
2919 {
2920         gint ok;
2921
2922         imap_gen_send(session, "UID STORE %s %s", seq_set, sub_cmd);
2923
2924         if ((ok = imap_cmd_ok(session, NULL)) != IMAP_SUCCESS) {
2925                 log_warning(_("error while imap command: STORE %s %s\n"),
2926                             seq_set, sub_cmd);
2927                 return ok;
2928         }
2929
2930         return IMAP_SUCCESS;
2931 }
2932
2933 static gint imap_cmd_expunge(IMAPSession *session)
2934 {
2935         gint ok;
2936
2937         imap_gen_send(session, "EXPUNGE");
2938         if ((ok = imap_cmd_ok(session, NULL)) != IMAP_SUCCESS) {
2939                 log_warning(_("error while imap command: EXPUNGE\n"));
2940                 return ok;
2941         }
2942
2943         return IMAP_SUCCESS;
2944 }
2945
2946 static gint imap_cmd_close(IMAPSession *session)
2947 {
2948         gint ok;
2949
2950         imap_gen_send(session, "CLOSE");
2951         if ((ok = imap_cmd_ok(session, NULL)) != IMAP_SUCCESS)
2952                 log_warning(_("error while imap command: CLOSE\n"));
2953
2954         return ok;
2955 }
2956
2957 static gint imap_cmd_ok(IMAPSession *session, GPtrArray *argbuf)
2958 {
2959         gint ok = IMAP_SUCCESS;
2960         gchar *buf;
2961         gint cmd_num;
2962         gchar *data;
2963
2964         while ((ok = imap_gen_recv(session, &buf))
2965                == IMAP_SUCCESS) {
2966                 // make sure data is long enough for any substring of buf
2967                 data = alloca(strlen(buf) + 1);
2968
2969                 // untagged line read
2970                 if (buf[0] == '*' && buf[1] == ' ') {
2971                         gint num;
2972                         if (argbuf)
2973                                 g_ptr_array_add(argbuf, g_strdup(buf + 2));
2974
2975                         if (sscanf(buf + 2, "%d %s", &num, data) >= 2) {
2976                                 if (!strcmp(data, "EXISTS")) {
2977                                         session->exists = num;
2978                                         session->folder_content_changed = TRUE;
2979                                 }
2980
2981                                 if(!strcmp(data, "EXPUNGE")) {
2982                                         session->exists--;
2983                                         session->folder_content_changed = TRUE;
2984                                 }
2985                         }
2986                 // tagged line with correct tag and OK response found
2987                 } else if ((sscanf(buf, "%d %s", &cmd_num, data) >= 2) &&
2988                            (cmd_num == session->cmd_count) &&
2989                            !strcmp(data, "OK")) {
2990                         if (argbuf)
2991                                 g_ptr_array_add(argbuf, g_strdup(buf));
2992                         break;
2993                 // everything else
2994                 } else {
2995                         ok = IMAP_ERROR;
2996                         break;
2997                 }
2998                 g_free(buf);
2999         }
3000         g_free(buf);
3001
3002         return ok;
3003 }
3004
3005 static void imap_gen_send(IMAPSession *session, const gchar *format, ...)
3006 {
3007         gchar *buf;
3008         gchar *tmp;
3009         gchar *p;
3010         va_list args;
3011
3012         va_start(args, format);
3013         tmp = g_strdup_vprintf(format, args);
3014         va_end(args);
3015
3016         session->cmd_count++;
3017
3018         buf = g_strdup_printf("%d %s\r\n", session->cmd_count, tmp);
3019         if (!strncasecmp(tmp, "LOGIN ", 6) && (p = strchr(tmp + 6, ' '))) {
3020                 *p = '\0';
3021                 log_print("IMAP4> %d %s ********\n", session->cmd_count, tmp);
3022         } else
3023                 log_print("IMAP4> %d %s\n", session->cmd_count, tmp);
3024
3025         sock_write_all(SESSION(session)->sock, buf, strlen(buf));
3026         g_free(tmp);
3027         g_free(buf);
3028 }
3029
3030 static gint imap_gen_recv(IMAPSession *session, gchar **ret)
3031 {
3032         if ((*ret = sock_getline(SESSION(session)->sock)) == NULL)
3033                 return IMAP_SOCKET;
3034
3035         strretchomp(*ret);
3036
3037         log_print("IMAP4< %s\n", *ret);
3038
3039         return IMAP_SUCCESS;
3040 }
3041
3042
3043 /* misc utility functions */
3044
3045 static gchar *strchr_cpy(const gchar *src, gchar ch, gchar *dest, gint len)
3046 {
3047         gchar *tmp;
3048
3049         dest[0] = '\0';
3050         tmp = strchr(src, ch);
3051         if (!tmp)
3052                 return NULL;
3053
3054         memcpy(dest, src, MIN(tmp - src, len - 1));
3055         dest[MIN(tmp - src, len - 1)] = '\0';
3056
3057         return tmp + 1;
3058 }
3059
3060 static gchar *get_quoted(const gchar *src, gchar ch, gchar *dest, gint len)
3061 {
3062         const gchar *p = src;
3063         gint n = 0;
3064
3065         g_return_val_if_fail(*p == ch, NULL);
3066
3067         *dest = '\0';
3068         p++;
3069
3070         while (*p != '\0' && *p != ch) {
3071                 if (n < len - 1) {
3072                         if (*p == '\\' && *(p + 1) != '\0')
3073                                 p++;
3074                         *dest++ = *p++;
3075                 } else
3076                         p++;
3077                 n++;
3078         }
3079
3080         *dest = '\0';
3081         return (gchar *)(*p == ch ? p + 1 : p);
3082 }
3083
3084 static gchar *search_array_contain_str(GPtrArray *array, const gchar *str)
3085 {
3086         gint i;
3087
3088         for (i = 0; i < array->len; i++) {
3089                 gchar *tmp;
3090
3091                 tmp = g_ptr_array_index(array, i);
3092                 if (strstr(tmp, str) != NULL)
3093                         return tmp;
3094         }
3095
3096         return NULL;
3097 }
3098
3099 static gchar *search_array_str(GPtrArray *array, const gchar *str)
3100 {
3101         gint i;
3102         gint len;
3103
3104         len = strlen(str);
3105
3106         for (i = 0; i < array->len; i++) {
3107                 gchar *tmp;
3108
3109                 tmp = g_ptr_array_index(array, i);
3110                 if (!strncmp(tmp, str, len))
3111                         return tmp;
3112         }
3113
3114         return NULL;
3115 }
3116
3117 static void imap_path_separator_subst(gchar *str, gchar separator)
3118 {
3119         gchar *p;
3120         gboolean in_escape = FALSE;
3121
3122         if (!separator || separator == '/') return;
3123
3124         for (p = str; *p != '\0'; p++) {
3125                 if (*p == '/' && !in_escape)
3126                         *p = separator;
3127                 else if (*p == '&' && *(p + 1) != '-' && !in_escape)
3128                         in_escape = TRUE;
3129                 else if (*p == '-' && in_escape)
3130                         in_escape = FALSE;
3131         }
3132 }
3133
3134 static gchar *imap_modified_utf7_to_locale(const gchar *mutf7_str)
3135 {
3136 #if !HAVE_ICONV
3137         const gchar *from_p;
3138         gchar *to, *to_p;
3139
3140         to = g_malloc(strlen(mutf7_str) + 1);
3141         to_p = to;
3142
3143         for (from_p = mutf7_str; *from_p != '\0'; from_p++) {
3144                 if (*from_p == '&' && *(from_p + 1) == '-') {
3145                         *to_p++ = '&';
3146                         from_p++;
3147                 } else
3148                         *to_p++ = *from_p;
3149         }
3150         *to_p = '\0';
3151
3152         return to;
3153 #else
3154         static iconv_t cd = (iconv_t)-1;
3155         static gboolean iconv_ok = TRUE;
3156         GString *norm_utf7;
3157         gchar *norm_utf7_p;
3158         size_t norm_utf7_len;
3159         const gchar *p;
3160         gchar *to_str, *to_p;
3161         size_t to_len;
3162         gboolean in_escape = FALSE;
3163
3164         if (!iconv_ok) return g_strdup(mutf7_str);
3165
3166         if (cd == (iconv_t)-1) {
3167                 cd = iconv_open(conv_get_current_charset_str(), "UTF-7");
3168                 if (cd == (iconv_t)-1) {
3169                         g_warning("iconv cannot convert UTF-7 to %s\n",
3170                                   conv_get_current_charset_str());
3171                         iconv_ok = FALSE;
3172                         return g_strdup(mutf7_str);
3173                 }
3174         }
3175
3176         norm_utf7 = g_string_new(NULL);
3177
3178         for (p = mutf7_str; *p != '\0'; p++) {
3179                 /* replace: '&'  -> '+',
3180                             "&-" -> '&',
3181                             escaped ','  -> '/' */
3182                 if (!in_escape && *p == '&') {
3183                         if (*(p + 1) != '-') {
3184                                 g_string_append_c(norm_utf7, '+');
3185                                 in_escape = TRUE;
3186                         } else {
3187                                 g_string_append_c(norm_utf7, '&');
3188                                 p++;
3189                         }
3190                 } else if (in_escape && *p == ',') {
3191                         g_string_append_c(norm_utf7, '/');
3192                 } else if (in_escape && *p == '-') {
3193                         g_string_append_c(norm_utf7, '-');
3194                         in_escape = FALSE;
3195                 } else {
3196                         g_string_append_c(norm_utf7, *p);
3197                 }
3198         }
3199
3200         norm_utf7_p = norm_utf7->str;
3201         norm_utf7_len = norm_utf7->len;
3202         to_len = strlen(mutf7_str) * 5;
3203         to_p = to_str = g_malloc(to_len + 1);
3204
3205         if (iconv(cd, (ICONV_CONST gchar **)&norm_utf7_p, &norm_utf7_len,
3206                   &to_p, &to_len) == -1) {
3207                 g_warning(_("iconv cannot convert UTF-7 to %s\n"),
3208                           conv_get_current_charset_str());
3209                 g_string_free(norm_utf7, TRUE);
3210                 g_free(to_str);
3211                 return g_strdup(mutf7_str);
3212         }
3213
3214         /* second iconv() call for flushing */
3215         iconv(cd, NULL, NULL, &to_p, &to_len);
3216         g_string_free(norm_utf7, TRUE);
3217         *to_p = '\0';
3218
3219         return to_str;
3220 #endif /* !HAVE_ICONV */
3221 }
3222
3223 static gchar *imap_locale_to_modified_utf7(const gchar *from)
3224 {
3225 #if !HAVE_ICONV
3226         const gchar *from_p;
3227         gchar *to, *to_p;
3228
3229         to = g_malloc(strlen(from) * 2 + 1);
3230         to_p = to;
3231
3232         for (from_p = from; *from_p != '\0'; from_p++) {
3233                 if (*from_p == '&') {
3234                         *to_p++ = '&';
3235                         *to_p++ = '-';
3236                 } else
3237                         *to_p++ = *from_p;
3238         }
3239         *to_p = '\0';
3240
3241         return to;
3242 #else
3243         static iconv_t cd = (iconv_t)-1;
3244         static gboolean iconv_ok = TRUE;
3245         gchar *norm_utf7, *norm_utf7_p;
3246         size_t from_len, norm_utf7_len;
3247         GString *to_str;
3248         gchar *from_tmp, *to, *p;
3249         gboolean in_escape = FALSE;
3250
3251         if (!iconv_ok) return g_strdup(from);
3252
3253         if (cd == (iconv_t)-1) {
3254                 cd = iconv_open("UTF-7", conv_get_current_charset_str());
3255                 if (cd == (iconv_t)-1) {
3256                         g_warning("iconv cannot convert %s to UTF-7\n",
3257                                   conv_get_current_charset_str());
3258                         iconv_ok = FALSE;
3259                         return g_strdup(from);
3260                 }
3261         }
3262
3263         Xstrdup_a(from_tmp, from, return g_strdup(from));
3264         from_len = strlen(from);
3265         norm_utf7_len = from_len * 5;
3266         Xalloca(norm_utf7, norm_utf7_len + 1, return g_strdup(from));
3267         norm_utf7_p = norm_utf7;
3268
3269 #define IS_PRINT(ch) (isprint(ch) && isascii(ch))
3270
3271         while (from_len > 0) {
3272                 if (*from_tmp == '+') {
3273                         *norm_utf7_p++ = '+';
3274                         *norm_utf7_p++ = '-';
3275                         norm_utf7_len -= 2;
3276                         from_tmp++;
3277                         from_len--;
3278                 } else if (IS_PRINT(*from_tmp)) {
3279                         /* printable ascii char */
3280                         *norm_utf7_p = *from_tmp;
3281                         norm_utf7_p++;
3282                         norm_utf7_len--;
3283                         from_tmp++;
3284                         from_len--;
3285                 } else {
3286                         size_t mb_len = 0, conv_len = 0;
3287
3288                         /* unprintable char: convert to UTF-7 */
3289                         p = from_tmp;
3290                         while (!IS_PRINT(*p) && conv_len < from_len) {
3291                                 mb_len = mblen(p, MB_LEN_MAX);
3292                                 if (mb_len <= 0) {
3293                                         g_warning("wrong multibyte sequence\n");
3294                                         return g_strdup(from);
3295                                 }
3296                                 conv_len += mb_len;
3297                                 p += mb_len;
3298                         }
3299
3300                         from_len -= conv_len;
3301                         if (iconv(cd, (ICONV_CONST gchar **)&from_tmp,
3302                                   &conv_len,
3303                                   &norm_utf7_p, &norm_utf7_len) == -1) {
3304                                 g_warning("iconv cannot convert %s to UTF-7\n",
3305                                           conv_get_current_charset_str());
3306                                 return g_strdup(from);
3307                         }
3308
3309                         /* second iconv() call for flushing */
3310                         iconv(cd, NULL, NULL, &norm_utf7_p, &norm_utf7_len);
3311                 }
3312         }
3313
3314 #undef IS_PRINT
3315
3316         *norm_utf7_p = '\0';
3317         to_str = g_string_new(NULL);
3318         for (p = norm_utf7; p < norm_utf7_p; p++) {
3319                 /* replace: '&' -> "&-",
3320                             '+' -> '&',
3321                             "+-" -> '+',
3322                             BASE64 '/' -> ',' */
3323                 if (!in_escape && *p == '&') {
3324                         g_string_append(to_str, "&-");
3325                 } else if (!in_escape && *p == '+') {
3326                         if (*(p + 1) == '-') {
3327                                 g_string_append_c(to_str, '+');
3328                                 p++;
3329                         } else {
3330                                 g_string_append_c(to_str, '&');
3331                                 in_escape = TRUE;
3332                         }
3333                 } else if (in_escape && *p == '/') {
3334                         g_string_append_c(to_str, ',');
3335                 } else if (in_escape && *p == '-') {
3336                         g_string_append_c(to_str, '-');
3337                         in_escape = FALSE;
3338                 } else {
3339                         g_string_append_c(to_str, *p);
3340                 }
3341         }
3342
3343         if (in_escape) {
3344                 in_escape = FALSE;
3345                 g_string_append_c(to_str, '-');
3346         }
3347
3348         to = to_str->str;
3349         g_string_free(to_str, FALSE);
3350
3351         return to;
3352 #endif /* !HAVE_ICONV */
3353 }
3354
3355 static GSList *imap_get_seq_set_from_numlist(MsgNumberList *numlist)
3356 {
3357         GString *str;
3358         GSList *sorted_list, *cur;
3359         guint first, last, next;
3360         gchar *ret_str;
3361         GSList *ret_list = NULL;
3362
3363         if (numlist == NULL)
3364                 return NULL;
3365
3366         str = g_string_sized_new(256);
3367
3368         sorted_list = g_slist_copy(numlist);
3369         sorted_list = g_slist_sort(sorted_list, g_int_compare);
3370
3371         first = GPOINTER_TO_INT(sorted_list->data);
3372
3373         for (cur = sorted_list; cur != NULL; cur = g_slist_next(cur)) {
3374                 last = GPOINTER_TO_INT(cur->data);
3375                 if (cur->next)
3376                         next = GPOINTER_TO_INT(cur->next->data);
3377                 else
3378                         next = 0;
3379
3380                 if (last + 1 != next || next == 0) {
3381                         if (str->len > 0)
3382                                 g_string_append_c(str, ',');
3383                         if (first == last)
3384                                 g_string_sprintfa(str, "%u", first);
3385                         else
3386                                 g_string_sprintfa(str, "%u:%u", first, last);
3387
3388                         first = next;
3389
3390                         if (str->len > IMAP_CMD_LIMIT) {
3391                                 ret_str = g_strdup(str->str);
3392                                 ret_list = g_slist_append(ret_list, ret_str);
3393                                 g_string_truncate(str, 0);
3394                         }
3395                 }
3396         }
3397
3398         if (str->len > 0) {
3399                 ret_str = g_strdup(str->str);
3400                 ret_list = g_slist_append(ret_list, ret_str);
3401         }
3402
3403         g_slist_free(sorted_list);
3404         g_string_free(str, TRUE);
3405
3406         return ret_list;
3407 }
3408
3409 static GSList *imap_get_seq_set_from_msglist(MsgInfoList *msglist)
3410 {
3411         MsgNumberList *numlist = NULL;
3412         MsgInfoList *cur;
3413         GSList *seq_list;
3414
3415         for (cur = msglist; cur != NULL; cur = g_slist_next(cur)) {
3416                 MsgInfo *msginfo = (MsgInfo *) cur->data;
3417
3418                 numlist = g_slist_append(numlist, GINT_TO_POINTER(msginfo->msgnum));
3419         }
3420         seq_list = imap_get_seq_set_from_numlist(numlist);
3421         g_slist_free(numlist);
3422
3423         return seq_list;
3424 }
3425
3426 static void imap_seq_set_free(GSList *seq_list)
3427 {
3428         slist_free_strings(seq_list);
3429         g_slist_free(seq_list);
3430 }
3431
3432
3433 static gboolean imap_rename_folder_func(GNode *node, gpointer data)
3434 {
3435         FolderItem *item = node->data;
3436         gchar **paths = data;
3437         const gchar *oldpath = paths[0];
3438         const gchar *newpath = paths[1];
3439         gchar *base;
3440         gchar *new_itempath;
3441         gint oldpathlen;
3442
3443         oldpathlen = strlen(oldpath);
3444         if (strncmp(oldpath, item->path, oldpathlen) != 0) {
3445                 g_warning("path doesn't match: %s, %s\n", oldpath, item->path);
3446                 return TRUE;
3447         }
3448
3449         base = item->path + oldpathlen;
3450         while (*base == G_DIR_SEPARATOR) base++;
3451         if (*base == '\0')
3452                 new_itempath = g_strdup(newpath);
3453         else
3454                 new_itempath = g_strconcat(newpath, G_DIR_SEPARATOR_S, base,
3455                                            NULL);
3456         g_free(item->path);
3457         item->path = new_itempath;
3458
3459         return FALSE;
3460 }
3461
3462 static gint get_list_of_uids(Folder *folder, IMAPFolderItem *item, GSList **msgnum_list)
3463 {
3464         gint ok, nummsgs = 0, lastuid_old;
3465         IMAPSession *session;
3466         GSList *uidlist, *elem;
3467         gchar *cmd_buf;
3468
3469         session = imap_session_get(folder);
3470         g_return_val_if_fail(session != NULL, -1);
3471
3472         ok = imap_select(session, IMAP_FOLDER(folder), item->item.path,
3473                          NULL, NULL, NULL, NULL);
3474         if (ok != IMAP_SUCCESS)
3475                 return -1;
3476
3477         cmd_buf = g_strdup_printf("UID %d:*", item->lastuid + 1);
3478         ok = imap_cmd_search(session, cmd_buf, &uidlist);
3479         g_free(cmd_buf);
3480
3481         if (ok == IMAP_SOCKET) {
3482                 session_destroy((Session *)session);
3483                 ((RemoteFolder *)folder)->session = NULL;
3484                 return -1;
3485         }
3486
3487         if (ok != IMAP_SUCCESS) {
3488                 gint i;
3489                 GPtrArray *argbuf;
3490
3491                 argbuf = g_ptr_array_new();
3492
3493                 cmd_buf = g_strdup_printf("UID FETCH %d:* (UID)", item->lastuid + 1);
3494                 imap_gen_send(session, cmd_buf);
3495                 g_free(cmd_buf);
3496                 ok = imap_cmd_ok(session, argbuf);
3497                 if (ok != IMAP_SUCCESS) {
3498                         ptr_array_free_strings(argbuf);
3499                         g_ptr_array_free(argbuf, TRUE);
3500                         return -1;
3501                 }
3502
3503                 for(i = 0; i < argbuf->len; i++) {
3504                         int ret, msgnum;
3505
3506                         if((ret = sscanf(g_ptr_array_index(argbuf, i),
3507                                     "%*d FETCH (UID %d)", &msgnum)) == 1)
3508                                 uidlist = g_slist_prepend(uidlist, GINT_TO_POINTER(msgnum));
3509                 }
3510                 ptr_array_free_strings(argbuf);
3511                 g_ptr_array_free(argbuf, TRUE);
3512         }
3513
3514         lastuid_old = item->lastuid;
3515         *msgnum_list = g_slist_copy(item->uid_list);
3516         nummsgs = g_slist_length(*msgnum_list);
3517         debug_print("Got %d uids from cache\n", g_slist_length(item->uid_list));
3518
3519         for (elem = uidlist; elem != NULL; elem = g_slist_next(elem)) {
3520                 guint msgnum;
3521
3522                 msgnum = GPOINTER_TO_INT(elem->data);
3523                 if (msgnum > lastuid_old) {
3524                         *msgnum_list = g_slist_prepend(*msgnum_list, GINT_TO_POINTER(msgnum));
3525                         item->uid_list = g_slist_prepend(item->uid_list, GINT_TO_POINTER(msgnum));
3526                         nummsgs++;
3527
3528                         if(msgnum > item->lastuid)
3529                                 item->lastuid = msgnum;
3530                 }
3531         }
3532         g_slist_free(uidlist);
3533
3534         return nummsgs;
3535 }
3536
3537 gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list)
3538 {
3539         IMAPFolderItem *item = (IMAPFolderItem *)_item;
3540         IMAPSession *session;
3541         gint ok, nummsgs = 0, exists, recent, unseen, uid_val,