src/imap.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999,2000 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 <glib.h>
  25 #include <stdio.h>
  26 #include <string.h>
  27 #include <stdlib.h>
  28 #include <dirent.h>
  29 #include <unistd.h>
  30
  31 #include "intl.h"
  32 #include "imap.h"
  33 #include "socket.h"
  34 #include "recv.h"
  35 #include "procmsg.h"
  36 #include "procheader.h"
  37 #include "folder.h"
  38 #include "statusbar.h"
  39 #include "prefs_account.h"
  40 #include "codeconv.h"
  41 #include "utils.h"
  42
  43 static GList *session_list = NULL;
  44
  45 static gint imap_cmd_count = 0;
  46
  47 static GSList *imap_get_uncached_messages(IMAPSession   *session,
  48                                           FolderItem    *item,
  49                                           gint          first,
  50                                           gint          last);
  51 static GSList *imap_delete_messages      (GSList        *mlist,
  52                                           gint          first,
  53                                           gint          last);
  54 static void imap_delete_all_messages     (FolderItem    *item);
  55
  56 static SockInfo *imap_open      (const gchar    *server,
  57                                  gushort         port,
  58                                  gchar          *buf);
  59 static gint imap_auth           (SockInfo       *sock,
  60                                  const gchar    *user,
  61                                  const gchar    *pass);
  62 static gint imap_logout         (SockInfo       *sock);
  63 static gint imap_noop           (SockInfo       *sock);
  64 static gint imap_select         (SockInfo       *sock,
  65                                  const gchar    *folder,
  66                                  gint           *exists,
  67                                  gint           *recent,
  68                                  gint           *unseen,
  69                                  gulong         *uid);
  70 static gint imap_create         (SockInfo       *sock,
  71                                  const gchar    *folder);
  72 static gint imap_delete         (SockInfo       *sock,
  73                                  const gchar    *folder);
  74 static gint imap_get_envelope   (SockInfo       *sock,
  75                                  gint            first,
  76                                  gint            last);
  77 #if 0
  78 static gint imap_search         (SockInfo       *sock,
  79                                  GSList         *numlist);
  80 #endif
  81 static gint imap_get_message    (SockInfo       *sock,
  82                                  gint            num,
  83                                  const gchar    *filename);
  84 static gint imap_copy_message   (SockInfo       *sock,
  85                                  gint            num,
  86                                  const gchar    *destfolder);
  87 static gint imap_store          (SockInfo       *sock,
  88                                  gint            first,
  89                                  gint            last,
  90                                  gchar          *sub_cmd);
  91
  92 static gint imap_set_article_flags      (IMAPSession    *session,
  93                                          gint            first,
  94                                          gint            last,
  95                                          IMAPFlags       flag,
  96                                          gboolean        is_set);
  97 static gint imap_expunge                (IMAPSession    *session);
  98
  99 static gchar *imap_parse_atom           (SockInfo *sock,
 100                                          gchar    *src,
 101                                          gchar    *dest,
 102                                          gchar    *orig_buf);
 103 static gchar *imap_parse_one_address    (SockInfo *sock,
 104                                          gchar    *start,
 105                                          gchar    *out_from_str,
 106                                          gchar    *out_fromname_str,
 107                                          gchar    *orig_buf);
 108 static gchar *imap_parse_address        (SockInfo *sock,
 109                                          gchar    *start,
 110                                          gchar   **out_from_str,
 111                                          gchar   **out_fromname_str,
 112                                          gchar    *orig_buf);
 113 static MsgFlags imap_parse_flags        (const gchar    *flag_str);
 114 static MsgInfo *imap_parse_envelope     (SockInfo *sock,
 115                                          gchar    *line_str);
 116
 117 static gint imap_ok             (SockInfo       *sock,
 118                                  GPtrArray      *argbuf);
 119 static void imap_gen_send       (SockInfo       *sock,
 120                                  const gchar    *format, ...);
 121 static gint imap_gen_recv       (SockInfo       *sock,
 122                                  gchar          *buf,
 123                                  gint            size);
 124
 125 static gchar *search_array_contain_str  (GPtrArray      *array,
 126                                          gchar          *str);
 127 static void imap_path_subst_slash_to_dot(gchar *str);
 128
 129
 130 static IMAPSession *imap_session_connect_if_not(Folder *folder)
 131 {
 132         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
 133
 134         g_return_val_if_fail(folder != NULL, NULL);
 135         g_return_val_if_fail(folder->type == F_IMAP, NULL);
 136         g_return_val_if_fail(folder->account != NULL, NULL);
 137
 138         if (!rfolder->session) {
 139                 rfolder->session =
 140                         imap_session_new(folder->account->recv_server, 143,
 141                                          folder->account->userid,
 142                                          folder->account->passwd);
 143         } else {
 144                 if (imap_noop(rfolder->session->sock) != IMAP_SUCCESS) {
 145                         log_warning(_("IMAP4 connection to %s:%d has been"
 146                                       " disconnected. Reconnecting...\n"),
 147                                     folder->account->recv_server, 143);
 148                         session_destroy(rfolder->session);
 149                         rfolder->session =
 150                                 imap_session_new(folder->account->recv_server,
 151                                                  143, folder->account->userid,
 152                                                  folder->account->passwd);
 153                 }
 154         }
 155
 156         return IMAP_SESSION(rfolder->session);
 157 }
 158
 159 Session *imap_session_new(const gchar *server, gushort port,
 160                           const gchar *user, const gchar *pass)
 161 {
 162         gchar buf[IMAPBUFSIZE];
 163         IMAPSession *session;
 164         SockInfo *imap_sock;
 165
 166         g_return_val_if_fail(server != NULL, NULL);
 167
 168         log_message(_("creating IMAP4 connection to %s:%d ...\n"),
 169                     server, port);
 170
 171         if ((imap_sock = imap_open(server, port, buf)) == NULL)
 172                 return NULL;
 173         if (imap_auth(imap_sock, user, pass) != IMAP_SUCCESS) {
 174                 imap_logout(imap_sock);
 175                 sock_close(imap_sock);
 176                 return NULL;
 177         }
 178
 179         session = g_new(IMAPSession, 1);
 180         SESSION(session)->type      = SESSION_IMAP;
 181         SESSION(session)->server    = g_strdup(server);
 182         SESSION(session)->sock      = imap_sock;
 183         SESSION(session)->connected = TRUE;
 184         SESSION(session)->phase     = SESSION_READY;
 185         SESSION(session)->data      = NULL;
 186         session->mbox = NULL;
 187
 188         session_list = g_list_append(session_list, session);
 189
 190         return SESSION(session);
 191 }
 192
 193 void imap_session_destroy(IMAPSession *session)
 194 {
 195         sock_close(SESSION(session)->sock);
 196         SESSION(session)->sock = NULL;
 197
 198         g_free(session->mbox);
 199
 200         session_list = g_list_remove(session_list, session);
 201 }
 202
 203 void imap_session_destroy_all(void)
 204 {
 205         while (session_list != NULL) {
 206                 IMAPSession *session = (IMAPSession *)session_list->data;
 207
 208                 imap_logout(SESSION(session)->sock);
 209                 imap_session_destroy(session);
 210         }
 211 }
 212
 213 GSList *imap_get_msg_list(Folder *folder, FolderItem *item, gboolean use_cache)
 214 {
 215         GSList *mlist = NULL;
 216         IMAPSession *session;
 217
 218         g_return_val_if_fail(folder != NULL, NULL);
 219         g_return_val_if_fail(item != NULL, NULL);
 220         g_return_val_if_fail(folder->type == F_IMAP, NULL);
 221         g_return_val_if_fail(folder->account != NULL, NULL);
 222
 223         session = imap_session_connect_if_not(folder);
 224
 225         if (!session) {
 226                 mlist = procmsg_read_cache(item, FALSE);
 227                 item->last_num = procmsg_get_last_num_in_cache(mlist);
 228                 procmsg_set_flags(mlist, item);
 229         } else {
 230                 gint ok, exists = 0, recent = 0, unseen = 0, begin = 1;
 231                 gulong uid = 0, last_uid = item->mtime;
 232
 233                 ok = imap_select(SESSION(session)->sock, item->path,
 234                                         &exists, &recent, &unseen, &uid);
 235                 if (ok != IMAP_SUCCESS) {
 236                         log_warning(_("can't select folder: %s\n"), item->path);
 237                         return NULL;
 238                 }
 239
 240                 if (use_cache) {
 241                         gint cache_last;
 242
 243                         mlist = procmsg_read_cache(item, FALSE);
 244                         procmsg_set_flags(mlist, item);
 245                         cache_last = procmsg_get_last_num_in_cache(mlist);
 246
 247                         /* calculating the range of envelope to get */
 248                         if (exists < cache_last) {
 249                                 /* some messages are deleted (get all) */
 250                                 begin = 1;
 251                         } else if (exists == cache_last) {
 252                                 if (last_uid != 0 && last_uid != uid) {
 253                                         /* some recent but deleted (get all) */
 254                                         begin = 1;
 255                                 } else {
 256                                         /* mailbox unchanged (get none)*/
 257                                         begin = -1;
 258                                 }
 259                         } else {
 260                                 if (exists == cache_last + recent) {
 261                                         /* some recent */
 262                                         begin = cache_last + 1;
 263                                 } else {
 264                                         /* some recent but deleted (get all) */
 265                                         begin = 1;
 266                                 }
 267                         }
 268
 269                         item->mtime = uid;
 270                 }
 271
 272                 if (1 < begin && begin <= exists) {
 273                         GSList *newlist;
 274
 275                         newlist = imap_get_uncached_messages
 276                                 (session, item, begin, exists);
 277                         imap_delete_messages(mlist, begin, INT_MAX);
 278                         mlist = g_slist_concat(mlist, newlist);
 279                 } else if (begin == 1) {
 280                         mlist = imap_get_uncached_messages
 281                                         (session, item, 1, exists);
 282                         imap_delete_all_messages(item);
 283                 }
 284
 285                 item->last_num = exists;
 286         }
 287
 288         statusbar_pop_all();
 289
 290         return mlist;
 291 }
 292
 293 gchar *imap_fetch_msg(Folder *folder, FolderItem *item, gint num)
 294 {
 295         gchar *path, *filename;
 296         IMAPSession *session;
 297         gint ok;
 298
 299         g_return_val_if_fail(folder != NULL, NULL);
 300         g_return_val_if_fail(item != NULL, NULL);
 301
 302         session = imap_session_connect_if_not(folder);
 303
 304         path = folder_item_get_path(item);
 305         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(num), NULL);
 306         g_free(path);
 307
 308         if (is_file_exist(filename)) {
 309                 debug_print(_("message %d has been already cached.\n"), num);
 310                 return filename;
 311         }
 312
 313         if (!session) {
 314                 g_free(filename);
 315                 return NULL;
 316         }
 317
 318         debug_print(_("getting message %d...\n"), num);
 319         ok = imap_get_message(SESSION(session)->sock, num, filename);
 320
 321         statusbar_pop_all();
 322
 323         if (ok != IMAP_SUCCESS) {
 324                 g_warning(_("can't fetch message %d\n"), num);
 325                 g_free(filename);
 326                 return NULL;
 327         }
 328
 329         return filename;
 330 }
 331
 332 gint imap_move_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
 333 {
 334         gchar *destdir;
 335         IMAPSession *session;
 336
 337         g_return_val_if_fail(folder != NULL, -1);
 338         g_return_val_if_fail(dest != NULL, -1);
 339         g_return_val_if_fail(msginfo != NULL, -1);
 340
 341         session = imap_session_connect_if_not(folder);
 342         if (!session) return -1;
 343
 344         if (msginfo->folder == dest) {
 345                 g_warning(_("the src folder is identical to the dest.\n"));
 346                 return -1;
 347         }
 348
 349         Xstrdup_a(destdir, dest->path, return -1);
 350         /* imap_path_subst_slash_to_dot(destdir); */
 351
 352         imap_copy_message(SESSION(session)->sock, msginfo->msgnum, destdir);
 353         imap_set_article_flags(session, msginfo->msgnum, msginfo->msgnum,
 354                                IMAP_FLAG_DELETED, TRUE);
 355         debug_print(_("Moving message %s%c%d to %s ...\n"),
 356                     msginfo->folder->path, G_DIR_SEPARATOR,
 357                     msginfo->msgnum, dest->path);
 358
 359         imap_expunge(session);
 360
 361         return IMAP_SUCCESS;
 362 }
 363
 364 gint imap_move_msgs_with_dest(Folder *folder, FolderItem *dest,
 365                               GSList *msglist)
 366 {
 367         gchar *destdir;
 368         GSList *cur;
 369         MsgInfo *msginfo;
 370         IMAPSession *session;
 371
 372         g_return_val_if_fail(folder != NULL, -1);
 373         g_return_val_if_fail(dest != NULL, -1);
 374         g_return_val_if_fail(msglist != NULL, -1);
 375
 376         session = imap_session_connect_if_not(folder);
 377         if (!session) return -1;
 378
 379         Xstrdup_a(destdir, dest->path, return -1);
 380         /* imap_path_subst_slash_to_dot(destdir); */
 381
 382         for (cur = msglist; cur != NULL; cur = cur->next) {
 383                 msginfo = (MsgInfo *)cur->data;
 384
 385                 if (msginfo->folder == dest) {
 386                         g_warning(_("the src folder is identical to the dest.\n"));
 387                         continue;
 388                 }
 389                 imap_copy_message(SESSION(session)->sock,
 390                                   msginfo->msgnum, destdir);
 391                 imap_set_article_flags
 392                         (session, msginfo->msgnum, msginfo->msgnum,
 393                          IMAP_FLAG_DELETED, TRUE);
 394
 395                 debug_print(_("Moving message %s%c%d to %s ...\n"),
 396                             msginfo->folder->path, G_DIR_SEPARATOR,
 397                             msginfo->msgnum, dest->path);
 398
 399         }
 400
 401         imap_expunge(session);
 402
 403         return IMAP_SUCCESS;
 404
 405 }
 406
 407 gint imap_remove_msg(Folder *folder, FolderItem *item, gint num)
 408 {
 409         gint exists, recent, unseen;
 410         gulong uid;
 411         gint ok;
 412         IMAPSession *session;
 413
 414         g_return_val_if_fail(folder != NULL, -1);
 415         g_return_val_if_fail(item != NULL, -1);
 416         g_return_val_if_fail(num > 0 && num <= item->last_num, -1);
 417
 418         session = imap_session_connect_if_not(folder);
 419         if (!session) return -1;
 420
 421         ok = imap_select(SESSION(session)->sock, item->path,
 422                          &exists, &recent, &unseen, &uid);
 423         if (ok != IMAP_SUCCESS) {
 424                 log_warning(_("can't select folder: %s\n"), item->path);
 425                 return ok;
 426         }
 427
 428         ok = imap_set_article_flags(IMAP_SESSION(REMOTE_FOLDER(folder)->session),
 429                                     num, num, IMAP_FLAG_DELETED, TRUE);
 430         if (ok != IMAP_SUCCESS) {
 431                 log_warning(_("can't set deleted flags: %d\n"), num);
 432                 return ok;
 433         }
 434
 435         ok = imap_expunge(session);
 436         if (ok != IMAP_SUCCESS) {
 437                 log_warning(_("can't expunge\n"));
 438                 return ok;
 439         }
 440
 441         return IMAP_SUCCESS;
 442 }
 443
 444 gint imap_remove_all_msg(Folder *folder, FolderItem *item)
 445 {
 446         gint exists, recent, unseen;
 447         gulong uid;
 448         gint ok;
 449         IMAPSession *session;
 450
 451         g_return_val_if_fail(folder != NULL, -1);
 452         g_return_val_if_fail(item != NULL, -1);
 453
 454         session = imap_session_connect_if_not(folder);
 455         if (!session) return -1;
 456
 457         ok = imap_select(SESSION(session)->sock, item->path,
 458                          &exists, &recent, &unseen, &uid);
 459         if (ok != IMAP_SUCCESS) {
 460                 log_warning(_("can't select folder: %s\n"), item->path);
 461                 return ok;
 462         }
 463
 464         ok = imap_set_article_flags(session, 1, exists,
 465                                     IMAP_FLAG_DELETED, TRUE);
 466         if (ok != IMAP_SUCCESS) {
 467                 log_warning(_("can't set deleted flags: 1:%d\n"), exists);
 468                 return ok;
 469         }
 470
 471         ok = imap_expunge(session);
 472         if (ok != IMAP_SUCCESS) {
 473                 log_warning(_("can't expunge\n"));
 474                 return ok;
 475         }
 476
 477         return IMAP_SUCCESS;
 478 }
 479
 480 void imap_scan_folder(Folder *folder, FolderItem *item)
 481 {
 482 }
 483
 484 FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
 485                                const gchar *name)
 486 {
 487         gint ok;
 488         gchar *dirpath, *imappath;
 489         IMAPSession *session;
 490         FolderItem *new_item;
 491
 492         g_return_val_if_fail(folder != NULL, NULL);
 493         g_return_val_if_fail(parent != NULL, NULL);
 494         g_return_val_if_fail(name != NULL, NULL);
 495
 496         session = imap_session_connect_if_not(folder);
 497         if (!session) return NULL;
 498
 499         if (parent->path)
 500                 dirpath = g_strconcat(parent->path, G_DIR_SEPARATOR_S, name,
 501                                       NULL);
 502         else
 503                 dirpath = g_strdup(name);
 504
 505         imappath = g_strdup(dirpath);
 506         /* imap_path_subst_slash_to_dot(imappath); */
 507
 508         if (strcmp(name, "INBOX") != 0) {
 509                 ok = imap_create(SESSION(session)->sock, imappath);
 510                 if (ok != IMAP_SUCCESS) {
 511                         log_warning(_("can't create mailbox\n"));
 512                         g_free(imappath);
 513                         g_free(dirpath);
 514                         return NULL;
 515                 }
 516         }
 517
 518         new_item = folder_item_new(name, dirpath);
 519         folder_item_append(parent, new_item);
 520         g_free(imappath);
 521         g_free(dirpath);
 522
 523         return new_item;
 524 }
 525
 526 gint imap_remove_folder(Folder *folder, FolderItem *item)
 527 {
 528         gint ok;
 529         IMAPSession *session;
 530
 531         g_return_val_if_fail(folder != NULL, -1);
 532         g_return_val_if_fail(item != NULL, -1);
 533         g_return_val_if_fail(item->path != NULL, -1);
 534
 535         session = imap_session_connect_if_not(folder);
 536         if (!session) return -1;
 537
 538         ok = imap_delete(SESSION(session)->sock, item->path);
 539         if (ok != IMAP_SUCCESS) {
 540                 log_warning(_("can't delete mailbox\n"));
 541                 return -1;
 542         }
 543
 544         folder_item_remove(item);
 545
 546         return 0;
 547 }
 548
 549 static GSList *imap_get_uncached_messages(IMAPSession *session,
 550                                           FolderItem *item,
 551                                           gint first, gint last)
 552 {
 553         gchar buf[IMAPBUFSIZE];
 554         GSList *newlist = NULL;
 555         GSList *llast = NULL;
 556         MsgInfo *msginfo;
 557
 558         g_return_val_if_fail(session != NULL, NULL);
 559         g_return_val_if_fail(item != NULL, NULL);
 560         g_return_val_if_fail(item->folder != NULL, NULL);
 561         g_return_val_if_fail(item->folder->type == F_IMAP, NULL);
 562         g_return_val_if_fail(first <= last, NULL);
 563
 564         if (imap_get_envelope(SESSION(session)->sock, first, last)
 565             != IMAP_SUCCESS) {
 566                 log_warning(_("can't get envelope\n"));
 567                 return NULL;
 568         }
 569
 570         for (;;) {
 571                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 572                         log_warning(_("error occurred while getting envelope.\n"));
 573                         return newlist;
 574                 }
 575                 strretchomp(buf);
 576                 if (buf[0] != '*' || buf[1] != ' ') break;
 577
 578                 msginfo = imap_parse_envelope(SESSION(session)->sock, buf);
 579                 if (!msginfo) {
 580                         log_warning(_("can't parse envelope: %s\n"), buf);
 581                         continue;
 582                 }
 583
 584                 msginfo->folder = item;
 585
 586                 if (!newlist)
 587                         llast = newlist = g_slist_append(newlist, msginfo);
 588                 else {
 589                         llast = g_slist_append(llast, msginfo);
 590                         llast = llast->next;
 591                 }
 592         }
 593
 594         return newlist;
 595 }
 596
 597 static GSList *imap_delete_messages(GSList *mlist, gint first, gint last)
 598 {
 599         GSList *cur, *next;
 600         MsgInfo *msginfo;
 601         gchar *cache_file;
 602
 603         for (cur = mlist; cur != NULL; ) {
 604                 next = cur->next;
 605
 606                 msginfo = (MsgInfo *)cur->data;
 607                 if ((msginfo) &&
 608                     (first <= msginfo->msgnum ) &&
 609                     (msginfo->msgnum <= last)) {
 610                         debug_print(_("deleting message %d...\n"),
 611                                     msginfo->msgnum);
 612
 613                         cache_file = procmsg_get_message_file_path(msginfo);
 614                         if (is_file_exist(cache_file)) unlink(cache_file);
 615                         g_free(cache_file);
 616
 617                         procmsg_msginfo_free(msginfo);
 618                         mlist = g_slist_remove(mlist, msginfo);
 619                 }
 620
 621                 cur = next;
 622         }
 623
 624         return mlist;
 625 }
 626
 627 static void imap_delete_all_messages(FolderItem *item)
 628 {
 629         DIR *dp;
 630         struct dirent *d;
 631         gchar *dir;
 632         gchar *file;
 633
 634         g_return_if_fail(item != NULL);
 635         g_return_if_fail(item->folder != NULL);
 636         g_return_if_fail(item->folder->type == F_IMAP);
 637
 638         dir = folder_item_get_path(item);
 639         if ((dp = opendir(dir)) == NULL) {
 640                 FILE_OP_ERROR(dir, "opendir");
 641                 g_free(dir);
 642                 return;
 643         }
 644
 645         debug_print(_("\tDeleting all cached messages... "));
 646
 647         while ((d = readdir(dp)) != NULL) {
 648                 if (to_number(d->d_name) < 0) continue;
 649
 650                 file = g_strconcat(dir, G_DIR_SEPARATOR_S, d->d_name, NULL);
 651
 652                 if (is_file_exist(file)) {
 653                         if (unlink(file) < 0)
 654                                 FILE_OP_ERROR(file, "unlink");
 655                 }
 656
 657                 g_free(file);
 658         }
 659
 660         closedir(dp);
 661         g_free(dir);
 662
 663         debug_print(_("done.\n"));
 664 }
 665
 666
 667 static SockInfo *imap_open(const gchar *server, gushort port, gchar *buf)
 668 {
 669         SockInfo *sock;
 670
 671         if ((sock = sock_connect(server, port)) == NULL) {
 672                 log_warning(_("Can't connect to IMAP4 server: %s:%d\n"),
 673                             server, port);
 674                 return NULL;
 675         }
 676
 677         imap_cmd_count = 0;
 678
 679         if (imap_noop(sock) != IMAP_SUCCESS) {
 680                 sock_close(sock);
 681                 return NULL;
 682         }
 683
 684         return sock;
 685 }
 686
 687 static gint imap_auth(SockInfo *sock, const gchar *user, const gchar *pass)
 688 {
 689         gint ok;
 690         GPtrArray *argbuf;
 691
 692         imap_gen_send(sock, "LOGIN \"%s\" %s", user, pass);
 693         argbuf = g_ptr_array_new();
 694         ok = imap_ok(sock, argbuf);
 695         if (ok != IMAP_SUCCESS) log_warning(_("IMAP4 login failed.\n"));
 696         ptr_array_free_strings(argbuf);
 697         g_ptr_array_free(argbuf, TRUE);
 698
 699         return ok;
 700 }
 701
 702 static gint imap_logout(SockInfo *sock)
 703 {
 704         imap_gen_send(sock, "LOGOUT");
 705         return imap_ok(sock, NULL);
 706 }
 707
 708 static gint imap_noop(SockInfo *sock)
 709 {
 710         imap_gen_send(sock, "NOOP");
 711         return imap_ok(sock, NULL);
 712 }
 713
 714 static gint imap_select(SockInfo *sock, const gchar *folder,
 715                         gint *exists, gint *recent, gint *unseen, gulong *uid)
 716 {
 717         gint ok;
 718         gchar *resp_str;
 719         GPtrArray *argbuf;
 720         gchar *imappath;
 721
 722         *exists = *recent = *unseen = *uid = 0;
 723         argbuf = g_ptr_array_new();
 724
 725         Xstrdup_a(imappath, folder, return -1);
 726         /* imap_path_subst_slash_to_dot(imappath); */
 727
 728         imap_gen_send(sock, "SELECT \"%s\"", imappath);
 729         if ((ok = imap_ok(sock, argbuf)) != IMAP_SUCCESS)
 730                 goto bail;
 731
 732         resp_str = search_array_contain_str(argbuf, "EXISTS");
 733         if (resp_str) {
 734                 if (sscanf(resp_str,"%d EXISTS", exists) != 1) {
 735                         g_warning("imap_select(): invalid EXISTS line.\n");
 736                         goto bail;
 737                 }
 738         }
 739
 740         resp_str = search_array_contain_str(argbuf, "RECENT");
 741         if (resp_str) {
 742                 if (sscanf(resp_str, "%d RECENT", recent) != 1) {
 743                         g_warning("imap_select(): invalid RECENT line.\n");
 744                         goto bail;
 745                 }
 746         }
 747
 748         resp_str = search_array_contain_str(argbuf, "UIDVALIDITY");
 749         if (resp_str) {
 750                 if (sscanf(resp_str, "OK [UIDVALIDITY %lu] ", uid) != 1) {
 751                         g_warning("imap_select(): invalid UIDVALIDITY line.\n");
 752                         goto bail;
 753                 }
 754         }
 755
 756         resp_str = search_array_contain_str(argbuf, "UNSEEN");
 757         if (resp_str) {
 758                 if (sscanf(resp_str, "OK [UNSEEN %d] ", unseen) != 1) {
 759                         g_warning("imap_select(): invalid UNSEEN line.\n");
 760                         goto bail;
 761                 }
 762         }
 763
 764 bail:
 765         ptr_array_free_strings(argbuf);
 766         g_ptr_array_free(argbuf, TRUE);
 767
 768         return ok;
 769 }
 770
 771 static gint imap_create(SockInfo *sock, const gchar *folder)
 772 {
 773         imap_gen_send(sock, "CREATE \"%s\"", folder);
 774         return imap_ok(sock, NULL);
 775 }
 776
 777 static gint imap_delete(SockInfo *sock, const gchar *folder)
 778 {
 779         imap_gen_send(sock, "DELETE \"%s\"", folder);
 780         return imap_ok(sock, NULL);
 781 }
 782
 783 static gchar *strchr_cpy(const gchar *src, gchar ch, gchar *dest, gint len)
 784 {
 785         gchar *tmp;
 786
 787         dest[0] = '\0';
 788         tmp = strchr(src, ch);
 789         if (!tmp || tmp == src)
 790                 return NULL;
 791
 792         memcpy(dest, src, MIN(tmp - src, len - 1));
 793         dest[MIN(tmp - src, len - 1)] = '\0';
 794
 795         return tmp + 1;
 796 }
 797
 798 static gint imap_get_message(SockInfo *sock, gint num, const gchar *filename)
 799 {
 800         gint ok;
 801         gchar buf[IMAPBUFSIZE];
 802         gchar *cur_pos;
 803         gchar size_str[32];
 804         glong size_num;
 805
 806         g_return_val_if_fail(filename != NULL, IMAP_ERROR);
 807
 808         imap_gen_send(sock, "FETCH %d BODY[]", num);
 809
 810         if (sock_gets(sock, buf, sizeof(buf)) < 0)
 811                 return IMAP_ERROR;
 812         strretchomp(buf);
 813         if (buf[0] != '*' || buf[1] != ' ')
 814                 return IMAP_ERROR;
 815         log_print("IMAP4< %s\n", buf);
 816
 817         cur_pos = strchr(buf, '{');
 818         g_return_val_if_fail(cur_pos != NULL, IMAP_ERROR);
 819         cur_pos = strchr_cpy(cur_pos + 1, '}', size_str, sizeof(size_str));
 820         g_return_val_if_fail(cur_pos != NULL, IMAP_ERROR);
 821         size_num = atol(size_str);
 822
 823         if (*cur_pos != '\0') return IMAP_ERROR;
 824
 825         if (recv_bytes_write_to_file(sock, size_num, filename) != 0)
 826                 return IMAP_ERROR;
 827
 828         if (imap_gen_recv(sock, buf, sizeof(buf)) != IMAP_SUCCESS)
 829                 return IMAP_ERROR;
 830
 831         if (buf[0] != ')')
 832                 return IMAP_ERROR;
 833
 834         ok = imap_ok(sock, NULL);
 835
 836         return ok;
 837 }
 838
 839 static gint imap_copy_message(SockInfo *sock, gint num, const gchar *destfolder)
 840 {
 841         gint ok;
 842
 843         g_return_val_if_fail(destfolder != NULL, IMAP_ERROR);
 844
 845         imap_gen_send(sock, "COPY %d %s", num, destfolder);
 846         ok = imap_ok(sock, NULL);
 847         if (ok != IMAP_SUCCESS) {
 848                 log_warning(_("can't copy %d to %s\n"), num, destfolder);
 849                 return -1;
 850         }
 851
 852         return ok;
 853 }
 854
 855 static gchar *imap_parse_atom(SockInfo *sock, gchar *src, gchar *dest,
 856                               gchar *orig_buf)
 857 {
 858         gchar *cur_pos = src;
 859
 860         while (*cur_pos == ' ') cur_pos++;
 861
 862         if (!strncmp(cur_pos, "NIL", 3)) {
 863                 *dest = '\0';
 864                 cur_pos += 3;
 865         } else if (*cur_pos == '\"') {
 866                 gchar *p;
 867
 868                 p = strchr_cpy(cur_pos + 1, '\"', dest, IMAPBUFSIZE);
 869                 cur_pos = p ? p : cur_pos + 2;
 870         } else if (*cur_pos == '{') {
 871                 gchar buf[32];
 872                 gint len;
 873
 874                 cur_pos = strchr_cpy(cur_pos + 1, '}', buf, sizeof(buf));
 875                 len = atoi(buf);
 876
 877                 g_return_val_if_fail(orig_buf != NULL, cur_pos);
 878
 879                 if (sock_gets(sock, orig_buf, IMAPBUFSIZE) < 0)
 880                         return cur_pos;
 881                 strretchomp(orig_buf);
 882                 log_print("IMAP4< %s\n", orig_buf);
 883                 memcpy(dest, orig_buf, len);
 884                 dest[len] = '\0';
 885                 cur_pos = orig_buf + len;
 886         }
 887
 888         return cur_pos;
 889 }
 890
 891 static gchar *imap_parse_one_address(SockInfo *sock, gchar *start,
 892                                      gchar *out_from_str,
 893                                      gchar *out_fromname_str,
 894                                      gchar *orig_buf)
 895 {
 896         gchar buf[IMAPBUFSIZE];
 897         gchar *cur_pos = start;
 898
 899         cur_pos = imap_parse_atom(sock, cur_pos, buf, orig_buf);
 900         conv_unmime_header(out_fromname_str, 256, buf, NULL);
 901
 902         if (out_fromname_str[0] != '\0') {
 903                 strcat(out_from_str, "\"");
 904                 strcat(out_from_str, out_fromname_str);
 905                 strcat(out_from_str, "\"");
 906         }
 907
 908         cur_pos = imap_parse_atom(sock, cur_pos, buf, orig_buf);
 909
 910         strcat(out_from_str, " <");
 911
 912         cur_pos = imap_parse_atom(sock, cur_pos, buf, orig_buf);
 913         strcat(out_from_str, buf);
 914
 915         cur_pos = imap_parse_atom(sock, cur_pos, buf, orig_buf);
 916         strcat(out_from_str, "@");
 917         strcat(out_from_str, buf);
 918         strcat(out_from_str, ">");
 919
 920         while (*cur_pos == ' ') cur_pos++;
 921
 922         g_return_val_if_fail(*cur_pos == ')', cur_pos + 1);
 923
 924         return cur_pos + 1;
 925 }
 926
 927 static gchar *imap_parse_address(SockInfo *sock, gchar *start,
 928                                  gchar **out_from_str,
 929                                  gchar **out_fromname_str,
 930                                  gchar *orig_buf)
 931 {
 932         gchar buf[IMAPBUFSIZE];
 933         gchar name_buf[IMAPBUFSIZE];
 934         gchar *cur_pos = start;
 935         gboolean first = TRUE;
 936
 937         if (out_from_str)     *out_from_str     = NULL;
 938         if (out_fromname_str) *out_fromname_str = NULL;
 939         buf[0] = name_buf[0] = '\0';
 940
 941         if (!strncmp(cur_pos, "NIL", 3)) {
 942                 if (out_from_str)     *out_from_str     = g_strdup("");
 943                 if (out_fromname_str) *out_fromname_str = g_strdup("");
 944                 return cur_pos + 3;
 945         }
 946
 947         g_return_val_if_fail(*cur_pos == '(', NULL);
 948         cur_pos++;
 949
 950         for (;;) {
 951                 gchar ch = *cur_pos++;
 952                 if (ch == ')') break;
 953                 if (ch == '(') {
 954                         if (!first) strcat(buf, ", ");
 955                         first = FALSE;
 956                         cur_pos = imap_parse_one_address
 957                                 (sock, cur_pos, buf, name_buf, orig_buf);
 958                         if (!cur_pos) return NULL;
 959                 }
 960         }
 961
 962         if (out_from_str)     *out_from_str     = g_strdup(buf);
 963         if (out_fromname_str) *out_fromname_str = g_strdup(name_buf);
 964
 965         return cur_pos;
 966 }
 967
 968 static MsgFlags imap_parse_flags(const gchar *flag_str)
 969 {
 970         gchar buf[32];
 971         const gchar *cur_pos = flag_str;
 972         const gchar *last_pos;
 973         MsgFlags flags;
 974
 975         flags = 0;
 976         MSG_SET_FLAGS(flags, MSG_UNREAD|MSG_IMAP);
 977
 978         while (cur_pos != NULL) {
 979                 cur_pos = strchr(cur_pos, '\\');
 980                 if (cur_pos == NULL) break;
 981
 982                 last_pos = cur_pos + 1;
 983                 cur_pos = strchr_cpy(last_pos, ' ', buf, sizeof(buf));
 984                 if (cur_pos == NULL)
 985                         strncpy2(buf, last_pos, sizeof(buf));
 986
 987                 if (g_strcasecmp(buf, "Recent") == 0) {
 988                         MSG_SET_FLAGS(flags, MSG_NEW|MSG_UNREAD);
 989                 } else if (g_strcasecmp(buf, "Seen") == 0) {
 990                         MSG_UNSET_FLAGS(flags, MSG_NEW|MSG_UNREAD);
 991                 } else if (g_strcasecmp(buf, "Deleted") == 0) {
 992                         MSG_SET_FLAGS(flags, MSG_DELETED);
 993                 } else if (g_strcasecmp(buf, "Flagged") == 0) {
 994                         MSG_SET_FLAGS(flags, MSG_MARKED);
 995                 }
 996         }
 997
 998         return flags;
 999 }
1000
1001 static MsgInfo *imap_parse_envelope(SockInfo *sock, gchar *line_str)
1002 {
1003         MsgInfo *msginfo;
1004         gchar buf[IMAPBUFSIZE];
1005         gchar tmp[IMAPBUFSIZE];
1006         gchar *cur_pos;
1007         gint msgnum;
1008         size_t size;
1009         gchar *date = NULL;
1010         time_t date_t;
1011         gchar *subject = NULL;
1012         gchar *tmp_from;
1013         gchar *tmp_fromname;
1014         gchar *from = NULL;
1015         gchar *fromname = NULL;
1016         gchar *tmp_to;
1017         gchar *to = NULL;
1018         gchar *inreplyto = NULL;
1019         gchar *msgid = NULL;
1020         MsgFlags flags;
1021
1022         log_print("IMAP4< %s\n", line_str);
1023
1024         g_return_val_if_fail(line_str != NULL, NULL);
1025         g_return_val_if_fail(line_str[0] == '*' && line_str[1] == ' ', NULL);
1026
1027         cur_pos = line_str + 2;
1028
1029 #define PARSE_ONE_ELEMENT(ch) \
1030 { \
1031         cur_pos = strchr_cpy(cur_pos, ch, buf, sizeof(buf)); \
1032         g_return_val_if_fail(cur_pos != NULL, NULL); \
1033 }
1034
1035         PARSE_ONE_ELEMENT(' ');
1036         msgnum = atoi(buf);
1037
1038         PARSE_ONE_ELEMENT(' ');
1039         g_return_val_if_fail(!strcmp(buf, "FETCH"), NULL);
1040
1041         PARSE_ONE_ELEMENT(' ');
1042         g_return_val_if_fail(!strcmp(buf, "(FLAGS"), NULL);
1043
1044         PARSE_ONE_ELEMENT(')');
1045         g_return_val_if_fail(*buf == '(', NULL);
1046         flags = imap_parse_flags(buf + 1);
1047
1048         g_return_val_if_fail(*cur_pos == ' ', NULL);
1049         g_return_val_if_fail
1050                 ((cur_pos = strchr_cpy(cur_pos + 1, ' ', buf, sizeof(buf))),
1051                  NULL);
1052         g_return_val_if_fail(!strcmp(buf, "RFC822.SIZE"), NULL);
1053
1054         PARSE_ONE_ELEMENT(' ');
1055         size = atoi(buf);
1056
1057         PARSE_ONE_ELEMENT(' ');
1058         g_return_val_if_fail(!strcmp(buf, "ENVELOPE"), NULL);
1059
1060         g_return_val_if_fail(*cur_pos == '(', NULL);
1061         cur_pos = imap_parse_atom(sock, cur_pos + 1, buf, line_str);
1062         Xstrdup_a(date, buf, return NULL);
1063         date_t = procheader_date_parse(NULL, date, 0);
1064
1065         cur_pos = imap_parse_atom(sock, cur_pos, buf, line_str);
1066         if (buf[0] != '\0') {
1067                 conv_unmime_header(tmp, sizeof(tmp), buf, NULL);
1068                 Xstrdup_a(subject, tmp, return NULL);
1069         }
1070
1071         g_return_val_if_fail(*cur_pos == ' ', NULL);
1072         cur_pos = imap_parse_address(sock, cur_pos + 1,
1073                                      &tmp_from, &tmp_fromname, line_str);
1074         Xstrdup_a(from, tmp_from,
1075                   {g_free(tmp_from); g_free(tmp_fromname); return NULL;});
1076         Xstrdup_a(fromname, tmp_fromname,
1077                   {g_free(tmp_from); g_free(tmp_fromname); return NULL;});
1078         g_free(tmp_from);
1079         g_free(tmp_fromname);
1080
1081 #define SKIP_ONE_ELEMENT() \
1082 { \
1083         g_return_val_if_fail(*cur_pos == ' ', NULL); \
1084         cur_pos = imap_parse_address(sock, cur_pos + 1, \
1085                                      NULL, NULL, line_str); \
1086 }
1087
1088         /* skip sender and reply-to */
1089         SKIP_ONE_ELEMENT();
1090         SKIP_ONE_ELEMENT();
1091
1092         g_return_val_if_fail(*cur_pos == ' ', NULL);
1093         cur_pos = imap_parse_address(sock, cur_pos + 1, &tmp_to, NULL, line_str);
1094         Xstrdup_a(to, tmp_to, {g_free(tmp_to); return NULL;});
1095         g_free(tmp_to);
1096
1097         /* skip Cc and Bcc */
1098         SKIP_ONE_ELEMENT();
1099         SKIP_ONE_ELEMENT();
1100
1101 #undef SKIP_ONE_ELEMENT
1102
1103         g_return_val_if_fail(*cur_pos == ' ', NULL);
1104         cur_pos = imap_parse_atom(sock, cur_pos, buf, line_str);
1105         if (buf[0] != '\0') {
1106                 eliminate_parenthesis(buf, '(', ')');
1107                 extract_parenthesis(buf, '<', '>');
1108                 remove_space(buf);
1109                 Xstrdup_a(inreplyto, buf, return NULL);
1110         }
1111
1112         g_return_val_if_fail(*cur_pos == ' ', NULL);
1113         cur_pos = imap_parse_atom(sock, cur_pos, buf, line_str);
1114         if (buf[0] != '\0') {
1115                 extract_parenthesis(buf, '<', '>');
1116                 remove_space(buf);
1117                 Xstrdup_a(msgid, buf, return NULL);
1118         }
1119
1120         msginfo = g_new0(MsgInfo, 1);
1121         msginfo->msgnum = msgnum;
1122         msginfo->size = size;
1123         msginfo->date = g_strdup(date);
1124         msginfo->date_t = date_t;
1125         msginfo->subject = g_strdup(subject);
1126         msginfo->from = g_strdup(from);
1127         msginfo->fromname = g_strdup(fromname);
1128         msginfo->to = g_strdup(to);
1129         msginfo->inreplyto = g_strdup(inreplyto);
1130         msginfo->msgid = g_strdup(msgid);
1131         msginfo->flags = flags;
1132
1133         return msginfo;
1134 }
1135
1136 gint imap_get_envelope(SockInfo *sock, gint first, gint last)
1137 {
1138         imap_gen_send(sock, "FETCH %d:%d (FLAGS RFC822.SIZE ENVELOPE)",
1139                       first, last);
1140
1141         return IMAP_SUCCESS;
1142 }
1143
1144 static gint imap_store(SockInfo *sock, gint first, gint last, gchar *sub_cmd)
1145 {
1146         gint ok;
1147         GPtrArray *argbuf;
1148
1149         argbuf = g_ptr_array_new();
1150
1151         imap_gen_send(sock, "STORE %d:%d %s", first, last, sub_cmd);
1152
1153         if ((ok = imap_ok(sock, argbuf)) != IMAP_SUCCESS) {
1154                 g_ptr_array_free(argbuf, TRUE);
1155                 log_warning(_("error while imap command: STORE %d:%d %s\n"),
1156                             first, last, sub_cmd);
1157                 return ok;
1158         }
1159
1160         g_ptr_array_free(argbuf, TRUE);
1161
1162         return IMAP_SUCCESS;
1163 }
1164
1165 static gint imap_set_article_flags(IMAPSession *session,
1166                                    gint first,
1167                                    gint last,
1168                                    IMAPFlags flags,
1169                                    gboolean is_set)
1170 {
1171         GString *buf;
1172         gint ok;
1173
1174         buf = g_string_new(is_set ? "+FLAGS (" : "-FLAGS (");
1175
1176         if (IMAP_IS_SEEN(flags))        g_string_append(buf, "\\Seen ");
1177         if (IMAP_IS_ANSWERED(flags))    g_string_append(buf, "\\Answered ");
1178         if (IMAP_IS_FLAGGED(flags))     g_string_append(buf, "\\Flagged ");
1179         if (IMAP_IS_DELETED(flags))     g_string_append(buf, "\\Deleted ");
1180         if (IMAP_IS_DRAFT(flags))       g_string_append(buf, "\\Draft");
1181
1182         if (buf->str[buf->len - 1] == ' ')
1183                 g_string_truncate(buf, buf->len - 1);
1184
1185         g_string_append_c(buf, ')');
1186
1187         ok = imap_store(SESSION(session)->sock, first, last, buf->str);
1188         g_string_free(buf, TRUE);
1189
1190         return ok;
1191 }
1192
1193 static gint imap_expunge(IMAPSession *session)
1194 {
1195         gint ok;
1196         GPtrArray *argbuf;
1197
1198         argbuf = g_ptr_array_new();
1199
1200         imap_gen_send(SESSION(session)->sock, "EXPUNGE");
1201
1202         if ((ok = imap_ok(SESSION(session)->sock, argbuf)) != IMAP_SUCCESS) {
1203                 log_warning(_("error while imap command: EXPUNGE\n"));
1204                 g_ptr_array_free(argbuf, TRUE);
1205                 return ok;
1206         }
1207
1208         g_ptr_array_free(argbuf, TRUE);
1209
1210         return IMAP_SUCCESS;
1211 }
1212
1213 static gint imap_ok(SockInfo *sock, GPtrArray *argbuf)
1214 {
1215         gint ok;
1216         gchar buf[IMAPBUFSIZE];
1217         gint cmd_num;
1218         gchar cmd_status[IMAPBUFSIZE];
1219
1220         while ((ok = imap_gen_recv(sock, buf, sizeof(buf))) == IMAP_SUCCESS) {
1221                 if (buf[0] == '*' && buf[1] == ' ') {
1222                         if (argbuf)
1223                                 g_ptr_array_add(argbuf, g_strdup(&buf[2]));
1224                 } else {
1225                         if (sscanf(buf, "%d %s", &cmd_num, cmd_status) < 2)
1226                                 return IMAP_ERROR;
1227                         else if (cmd_num == imap_cmd_count &&
1228                                  !strcmp(cmd_status, "OK")) {
1229                                 if (argbuf)
1230                                         g_ptr_array_add(argbuf, g_strdup(buf));
1231                                 return IMAP_SUCCESS;
1232                         } else
1233                                 return IMAP_ERROR;
1234                 }
1235         }
1236
1237         return ok;
1238 }
1239
1240 static gchar *search_array_contain_str(GPtrArray *array, gchar *str)
1241 {
1242         gint i;
1243
1244         for (i = 0; i < array->len; i++) {
1245                 gchar *tmp;
1246
1247                 tmp = g_ptr_array_index(array, i);
1248                 if (strstr(tmp, str) != NULL)
1249                         return tmp;
1250         }
1251
1252         return NULL;
1253 }
1254
1255 static void imap_gen_send(SockInfo *sock, const gchar *format, ...)
1256 {
1257         gchar buf[IMAPBUFSIZE];
1258         gchar tmp[IMAPBUFSIZE];
1259         gchar *p;
1260         va_list args;
1261
1262         va_start(args, format);
1263         g_vsnprintf(tmp, sizeof(tmp), format, args);
1264         va_end(args);
1265
1266         imap_cmd_count++;
1267
1268         g_snprintf(buf, sizeof(buf), "%d %s\r\n", imap_cmd_count, tmp);
1269         if (!strncasecmp(tmp, "LOGIN ", 6) && (p = strchr(tmp + 6, ' '))) {
1270                 *(p + 1) = '\0';
1271                 log_print("IMAP4> %d %s ********\n", imap_cmd_count, tmp);
1272         } else
1273                 log_print("IMAP4> %d %s\n", imap_cmd_count, tmp);
1274
1275         sock_write(sock, buf, strlen(buf));
1276 }
1277
1278 static gint imap_gen_recv(SockInfo *sock, gchar *buf, gint size)
1279 {
1280         if (sock_gets(sock, buf, size) == -1)
1281                 return IMAP_SOCKET;
1282
1283         strretchomp(buf);
1284
1285         log_print("IMAP4< %s\n", buf);
1286
1287         return IMAP_SUCCESS;
1288 }
1289
1290 static void imap_path_subst_slash_to_dot(gchar *str)
1291 {
1292         subst_char(str, '/', '.');
1293 }