src/pop.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2002 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 <stdarg.h>
  28 #include <ctype.h>
  29 #include <unistd.h>
  30 #include <time.h>
  31
  32 #include "intl.h"
  33 #include "pop.h"
  34 #include "socket.h"
  35 #include "md5.h"
  36 #include "prefs_account.h"
  37 #include "utils.h"
  38 #include "inc.h"
  39 #include "recv.h"
  40 #include "selective_download.h"
  41 #if USE_SSL
  42 #  include "ssl.h"
  43 #endif
  44
  45 #define LOOKUP_NEXT_MSG()                                                       \
  46 {                                                                               \
  47         Pop3MsgInfo *msg;                                                       \
  48         PrefsAccount *ac = state->ac_prefs;                                     \
  49         gint size;                                                              \
  50         gboolean size_limit_over;                                               \
  51                                                                                 \
  52         for (;;) {                                                              \
  53                 msg = &state->msg[state->cur_msg];                              \
  54                 size = msg->size;                                               \
  55                 size_limit_over =                                               \
  56                     (ac->enable_size_limit &&                                   \
  57                      ac->size_limit > 0 &&                                      \
  58                      size > ac->size_limit * 1024);                             \
  59                                                                                 \
  60                 if (ac->rmmail &&                                               \
  61                     msg->recv_time != 0 &&                                      \
  62                     state->current_time - msg->recv_time >=                     \
  63                     ac->msg_leave_time * 24 * 60 * 60) {                        \
  64                         log_print(_("POP3: Deleting expired message %d\n"),     \
  65                                   state->cur_msg);                              \
  66                         return POP3_DELETE_SEND;                                \
  67                 }                                                               \
  68                                                                                 \
  69                 if (size_limit_over)                                            \
  70                         log_print(_("POP3: Skipping message %d (%d bytes)\n"),  \
  71                                   state->cur_msg, size);                        \
  72                                                                                 \
  73                 if (size == 0 || msg->received || size_limit_over) {            \
  74                         state->cur_total_bytes += size;                         \
  75                         if (state->cur_msg == state->count)                     \
  76                                 return POP3_LOGOUT_SEND;                        \
  77                         else                                                    \
  78                                 state->cur_msg++;                               \
  79                 } else                                                          \
  80                         break;                                                  \
  81         }                                                                       \
  82 }
  83
  84 static gint pop3_ok(SockInfo *sock, gchar *argbuf);
  85 static void pop3_gen_send(SockInfo *sock, const gchar *format, ...);
  86 static gint pop3_gen_recv(SockInfo *sock, gchar *buf, gint size);
  87 static gboolean pop3_sd_get_next (Pop3State *state);
  88 static void pop3_sd_new_header(Pop3State *state);
  89 gboolean pop3_sd_state(Pop3State *state, gint cur_state, guint *next_state);
  90
  91 gint pop3_greeting_recv(SockInfo *sock, gpointer data)
  92 {
  93         Pop3State *state = (Pop3State *)data;
  94         gchar buf[POPBUFSIZE];
  95
  96         if (pop3_ok(sock, buf) == PS_SUCCESS) {
  97                 state->greeting = g_strdup(buf);
  98 #if USE_SSL
  99                 if (state->ac_prefs->ssl_pop == SSL_STARTTLS)
 100                         return POP3_STLS_SEND;
 101 #endif
 102                 if (state->ac_prefs->protocol == A_APOP)
 103                         return POP3_GETAUTH_APOP_SEND;
 104                 else
 105                         return POP3_GETAUTH_USER_SEND;
 106         } else
 107                 return -1;
 108 }
 109
 110 #if USE_SSL
 111 gint pop3_stls_send(SockInfo *sock, gpointer data)
 112 {
 113         pop3_gen_send(sock, "STLS");
 114
 115         return POP3_STLS_RECV;
 116 }
 117
 118 gint pop3_stls_recv(SockInfo *sock, gpointer data)
 119 {
 120         Pop3State *state = (Pop3State *)data;
 121         gint ok;
 122
 123         if ((ok = pop3_ok(sock, NULL)) == PS_SUCCESS) {
 124                 if (!ssl_init_socket_with_method(sock, SSL_METHOD_TLSv1))
 125                         return -1;
 126                 if (state->ac_prefs->protocol == A_APOP)
 127                         return POP3_GETAUTH_APOP_SEND;
 128                 else
 129                         return POP3_GETAUTH_USER_SEND;
 130         } else if (ok == PS_PROTOCOL) {
 131                 log_warning(_("can't start TLS session\n"));
 132                 state->error_val = PS_PROTOCOL;
 133                 state->inc_state = INC_ERROR;
 134                 return POP3_LOGOUT_SEND;
 135         } else
 136                 return -1;
 137 }
 138 #endif /* USE_SSL */
 139
 140 gint pop3_getauth_user_send(SockInfo *sock, gpointer data)
 141 {
 142         Pop3State *state = (Pop3State *)data;
 143
 144         g_return_val_if_fail(state->user != NULL, -1);
 145
 146         pop3_gen_send(sock, "USER %s", state->user);
 147
 148         return POP3_GETAUTH_USER_RECV;
 149 }
 150
 151 gint pop3_getauth_user_recv(SockInfo *sock, gpointer data)
 152 {
 153         Pop3State *state = (Pop3State *)data;
 154
 155         if (pop3_ok(sock, NULL) == PS_SUCCESS)
 156                 return POP3_GETAUTH_PASS_SEND;
 157         else {
 158                 log_warning(_("error occurred on authentication\n"));
 159                 state->error_val = PS_AUTHFAIL;
 160                 state->inc_state = INC_AUTH_FAILED;
 161                 return -1;
 162         }
 163 }
 164
 165 gint pop3_getauth_pass_send(SockInfo *sock, gpointer data)
 166 {
 167         Pop3State *state = (Pop3State *)data;
 168
 169         g_return_val_if_fail(state->pass != NULL, -1);
 170
 171         pop3_gen_send(sock, "PASS %s", state->pass);
 172
 173         return POP3_GETAUTH_PASS_RECV;
 174 }
 175
 176 gint pop3_getauth_pass_recv(SockInfo *sock, gpointer data)
 177 {
 178         Pop3State *state = (Pop3State *)data;
 179
 180         if (pop3_ok(sock, NULL) == PS_SUCCESS)
 181                 return POP3_GETRANGE_STAT_SEND;
 182         else {
 183                 log_warning(_("error occurred on authentication\n"));
 184                 state->error_val = PS_AUTHFAIL;
 185                 state->inc_state = INC_AUTH_FAILED;
 186                 return -1;
 187         }
 188 }
 189
 190 gint pop3_getauth_apop_send(SockInfo *sock, gpointer data)
 191 {
 192         Pop3State *state = (Pop3State *)data;
 193         gchar *start, *end;
 194         gchar *apop_str;
 195         gchar md5sum[33];
 196
 197         g_return_val_if_fail(state->user != NULL, -1);
 198         g_return_val_if_fail(state->pass != NULL, -1);
 199
 200         if ((start = strchr(state->greeting, '<')) == NULL) {
 201                 log_warning(_("Required APOP timestamp not found "
 202                               "in greeting\n"));
 203                 return -1;
 204         }
 205
 206         if ((end = strchr(start, '>')) == NULL || end == start + 1) {
 207                 log_warning(_("Timestamp syntax error in greeting\n"));
 208                 return -1;
 209         }
 210
 211         *(end + 1) = '\0';
 212
 213         apop_str = g_strconcat(start, state->pass, NULL);
 214         md5_hex_digest(md5sum, apop_str);
 215         g_free(apop_str);
 216
 217         pop3_gen_send(sock, "APOP %s %s", state->user, md5sum);
 218
 219         return POP3_GETAUTH_APOP_RECV;
 220 }
 221
 222 gint pop3_getauth_apop_recv(SockInfo *sock, gpointer data)
 223 {
 224         Pop3State *state = (Pop3State *)data;
 225
 226         if (pop3_ok(sock, NULL) == PS_SUCCESS)
 227                 return POP3_GETRANGE_STAT_SEND;
 228         else {
 229                 log_warning(_("error occurred on authentication\n"));
 230                 state->error_val = PS_AUTHFAIL;
 231                 state->inc_state = INC_AUTH_FAILED;
 232                 return -1;
 233         }
 234 }
 235
 236 gint pop3_getrange_stat_send(SockInfo *sock, gpointer data)
 237 {
 238         pop3_gen_send(sock, "STAT");
 239
 240         return POP3_GETRANGE_STAT_RECV;
 241 }
 242
 243 gint pop3_getrange_stat_recv(SockInfo *sock, gpointer data)
 244 {
 245         Pop3State *state = (Pop3State *)data;
 246         gchar buf[POPBUFSIZE + 1];
 247         gint ok;
 248
 249         if ((ok = pop3_ok(sock, buf)) == PS_SUCCESS) {
 250                 if (sscanf(buf, "%d %d", &state->count, &state->total_bytes)
 251                     != 2) {
 252                         log_warning(_("POP3 protocol error\n"));
 253                         return -1;
 254                 } else {
 255                         if (state->count == 0) {
 256                                 state->uidl_is_valid = TRUE;
 257                                 return POP3_LOGOUT_SEND;
 258                         } else {
 259                                 state->msg = g_new0
 260                                         (Pop3MsgInfo, state->count + 1);
 261                                 state->cur_msg = 1;
 262                                 return POP3_GETRANGE_UIDL_SEND;
 263                         }
 264                 }
 265         } else if (ok == PS_PROTOCOL)
 266                 return POP3_LOGOUT_SEND;
 267         else
 268                 return -1;
 269 }
 270
 271 gint pop3_getrange_last_send(SockInfo *sock, gpointer data)
 272 {
 273         pop3_gen_send(sock, "LAST");
 274
 275         return POP3_GETRANGE_LAST_RECV;
 276 }
 277
 278 gint pop3_getrange_last_recv(SockInfo *sock, gpointer data)
 279 {
 280         Pop3State *state = (Pop3State *)data;
 281         gchar buf[POPBUFSIZE + 1];
 282
 283         if (pop3_ok(sock, buf) == PS_SUCCESS) {
 284                 gint last;
 285
 286                 if (sscanf(buf, "%d", &last) == 0) {
 287                         log_warning(_("POP3 protocol error\n"));
 288                         return -1;
 289                 } else {
 290                         if (state->count == last)
 291                                 return POP3_LOGOUT_SEND;
 292                         else {
 293                                 state->cur_msg = last + 1;
 294                                 return POP3_GETSIZE_LIST_SEND;
 295                         }
 296                 }
 297         } else
 298                 return POP3_GETSIZE_LIST_SEND;
 299 }
 300
 301 gint pop3_getrange_uidl_send(SockInfo *sock, gpointer data)
 302 {
 303         pop3_gen_send(sock, "UIDL");
 304
 305         return POP3_GETRANGE_UIDL_RECV;
 306 }
 307
 308 gint pop3_getrange_uidl_recv(SockInfo *sock, gpointer data)
 309 {
 310         Pop3State *state = (Pop3State *)data;
 311         gboolean new = FALSE;
 312         gboolean get_all = FALSE;
 313         gchar buf[POPBUFSIZE];
 314         gchar id[IDLEN + 1];
 315         gint next_state;
 316
 317         if (!state->uidl_table) new = TRUE;
 318         if (state->ac_prefs->getall ||
 319             (state->ac_prefs->rmmail && state->ac_prefs->msg_leave_time == 0))
 320                 get_all = TRUE;
 321
 322         if (pop3_ok(sock, NULL) != PS_SUCCESS) {
 323                 /* UIDL is not supported */
 324                 if (pop3_sd_state(state, POP3_GETRANGE_UIDL_RECV, &next_state))
 325                         return next_state;
 326
 327                 if (!get_all)
 328                         return POP3_GETRANGE_LAST_SEND;
 329                 else
 330                         return POP3_GETSIZE_LIST_SEND;
 331         }
 332
 333         while (sock_gets(sock, buf, sizeof(buf)) >= 0) {
 334                 gint num;
 335                 time_t recv_time;
 336
 337                 if (buf[0] == '.') break;
 338                 if (sscanf(buf, "%d %" Xstr(IDLEN) "s", &num, id) != 2)
 339                         continue;
 340                 if (num <= 0 || num > state->count) continue;
 341
 342                 state->msg[num].uidl = g_strdup(id);
 343
 344                 if (!state->uidl_table) continue;
 345
 346                 recv_time = (time_t)g_hash_table_lookup(state->uidl_table, id);
 347                 state->msg[num].recv_time = recv_time;
 348
 349                 if (!get_all && recv_time != 0)
 350                         state->msg[num].received = TRUE;
 351
 352                 if (new == FALSE &&
 353                     (get_all || recv_time == 0 || state->ac_prefs->rmmail)) {
 354                         state->cur_msg = num;
 355                         new = TRUE;
 356                 }
 357         }
 358
 359         state->uidl_is_valid = TRUE;
 360
 361         if (pop3_sd_state(state, POP3_GETRANGE_UIDL_RECV, &next_state))
 362                 return next_state;
 363
 364         if (new == TRUE)
 365                 return POP3_GETSIZE_LIST_SEND;
 366         else
 367                 return POP3_LOGOUT_SEND;
 368 }
 369
 370 gint pop3_getsize_list_send(SockInfo *sock, gpointer data)
 371 {
 372         pop3_gen_send(sock, "LIST");
 373
 374         return POP3_GETSIZE_LIST_RECV;
 375 }
 376
 377 gint pop3_getsize_list_recv(SockInfo *sock, gpointer data)
 378 {
 379         Pop3State *state = (Pop3State *)data;
 380         gchar buf[POPBUFSIZE];
 381         gint next_state;
 382
 383         if (pop3_ok(sock, NULL) != PS_SUCCESS) return POP3_LOGOUT_SEND;
 384
 385         state->cur_total_bytes = 0;
 386
 387         while (sock_gets(sock, buf, sizeof(buf)) >= 0) {
 388                 guint num, size;
 389
 390                 if (buf[0] == '.') break;
 391                 if (sscanf(buf, "%u %u", &num, &size) != 2)
 392                         return -1;
 393
 394                 if (num > 0 && num <= state->count)
 395                         state->msg[num].size = size;
 396                 if (num > 0 && num < state->cur_msg)
 397                         state->cur_total_bytes += size;
 398         }
 399
 400         if (pop3_sd_state(state, POP3_GETSIZE_LIST_RECV, &next_state))
 401                 return next_state;
 402
 403         LOOKUP_NEXT_MSG();
 404         return POP3_RETR_SEND;
 405 }
 406
 407 gint pop3_top_send(SockInfo *sock, gpointer data)
 408 {
 409         Pop3State *state = (Pop3State *)data;
 410
 411         inc_progress_update(state, POP3_TOP_SEND);
 412
 413         pop3_gen_send(sock, "TOP %i 0", state->cur_msg );
 414
 415         return POP3_TOP_RECV;
 416 }
 417
 418 gint pop3_top_recv(SockInfo *sock, gpointer data)
 419 {
 420         Pop3State *state = (Pop3State *)data;
 421         gchar *filename, *path;
 422         gint next_state;
 423
 424         if (pop3_ok(sock, NULL) != PS_SUCCESS)
 425                 return POP3_LOGOUT_SEND;
 426
 427         path = g_strconcat(get_header_cache_dir(), G_DIR_SEPARATOR_S, NULL);
 428
 429         if ( !is_dir_exist(path) )
 430                 make_dir_hier(path);
 431
 432         filename = g_strdup_printf("%s%i", path, state->cur_msg);
 433
 434         if (recv_write_to_file(sock, filename) < 0) {
 435                 state->inc_state = INC_NOSPACE;
 436                 return -1;
 437         }
 438
 439         pop3_sd_state(state, POP3_TOP_RECV, &next_state);
 440
 441         if (state->cur_msg < state->count) {
 442                 state->cur_msg++;
 443                 return POP3_TOP_SEND;
 444         } else
 445                 return POP3_LOGOUT_SEND;
 446 }
 447
 448 gint pop3_retr_send(SockInfo *sock, gpointer data)
 449 {
 450         Pop3State *state = (Pop3State *)data;
 451
 452         pop3_gen_send(sock, "RETR %d", state->cur_msg);
 453
 454         return POP3_RETR_RECV;
 455 }
 456
 457 gint pop3_retr_recv(SockInfo *sock, gpointer data)
 458 {
 459         Pop3State *state = (Pop3State *)data;
 460         const gchar *file;
 461         gint ok, drop_ok;
 462         gint next_state;
 463         if ((ok = pop3_ok(sock, NULL)) == PS_SUCCESS) {
 464                 if (recv_write_to_file(sock, (file = get_tmp_file())) < 0) {
 465                         if (state->inc_state == INC_SUCCESS)
 466                                 state->inc_state = INC_NOSPACE;
 467                         return -1;
 468                 }
 469
 470                 if ((drop_ok = inc_drop_message(file, state)) < 0) {
 471                         state->inc_state = INC_ERROR;
 472                         return -1;
 473                 }
 474
 475                 if (pop3_sd_state(state, POP3_RETR_RECV, &next_state))
 476                         return next_state;
 477
 478                 state->cur_total_bytes += state->msg[state->cur_msg].size;
 479                 state->cur_total_num++;
 480
 481                 state->msg[state->cur_msg].received = TRUE;
 482                 state->msg[state->cur_msg].recv_time = state->current_time;
 483
 484                 if (state->ac_prefs->rmmail &&
 485                     state->ac_prefs->msg_leave_time == 0)
 486                         return POP3_DELETE_SEND;
 487
 488                 if (state->cur_msg < state->count) {
 489                         state->cur_msg++;
 490                         LOOKUP_NEXT_MSG();
 491                         return POP3_RETR_SEND;
 492                 } else
 493                         return POP3_LOGOUT_SEND;
 494         } else if (ok == PS_PROTOCOL)
 495                 return POP3_LOGOUT_SEND;
 496         else
 497                 return -1;
 498 }
 499
 500 gint pop3_delete_send(SockInfo *sock, gpointer data)
 501 {
 502         Pop3State *state = (Pop3State *)data;
 503
 504         pop3_gen_send(sock, "DELE %d", state->cur_msg);
 505
 506         return POP3_DELETE_RECV;
 507 }
 508
 509 gint pop3_delete_recv(SockInfo *sock, gpointer data)
 510 {
 511         Pop3State *state = (Pop3State *)data;
 512         gint next_state;
 513         gint ok;
 514
 515         if ((ok = pop3_ok(sock, NULL)) == PS_SUCCESS) {
 516
 517                 state->msg[state->cur_msg].deleted = TRUE;
 518
 519                 if (pop3_sd_state(state, POP3_DELETE_RECV, &next_state))
 520                         return next_state;
 521
 522                 if (state->cur_msg < state->count) {
 523                         state->cur_msg++;
 524                         LOOKUP_NEXT_MSG();
 525                         return POP3_RETR_SEND;
 526                 } else
 527                         return POP3_LOGOUT_SEND;
 528         } else if (ok == PS_PROTOCOL)
 529                 return POP3_LOGOUT_SEND;
 530         else
 531                 return -1;
 532 }
 533
 534 gint pop3_logout_send(SockInfo *sock, gpointer data)
 535 {
 536         pop3_gen_send(sock, "QUIT");
 537
 538         return POP3_LOGOUT_RECV;
 539 }
 540
 541 gint pop3_logout_recv(SockInfo *sock, gpointer data)
 542 {
 543         if (pop3_ok(sock, NULL) == PS_SUCCESS)
 544                 return -1;
 545         else
 546                 return -1;
 547 }
 548
 549 static gint pop3_ok(SockInfo *sock, gchar *argbuf)
 550 {
 551         gint ok;
 552         gchar buf[POPBUFSIZE + 1];
 553         gchar *bufp;
 554
 555         if ((ok = pop3_gen_recv(sock, buf, sizeof(buf))) == PS_SUCCESS) {
 556                 bufp = buf;
 557                 if (*bufp == '+' || *bufp == '-')
 558                         bufp++;
 559                 else
 560                         return PS_PROTOCOL;
 561
 562                 while (isalpha(*bufp))
 563                         bufp++;
 564
 565                 if (*bufp)
 566                         *(bufp++) = '\0';
 567
 568                 if (!strcmp(buf, "+OK"))
 569                         ok = PS_SUCCESS;
 570                 else if (!strncmp(buf, "-ERR", 4)) {
 571                         if (strstr(bufp, "lock") ||
 572                                  strstr(bufp, "Lock") ||
 573                                  strstr(bufp, "LOCK") ||
 574                                  strstr(bufp, "wait"))
 575                                 ok = PS_LOCKBUSY;
 576                         else
 577                                 ok = PS_PROTOCOL;
 578
 579                         if (*bufp)
 580                                 fprintf(stderr, "POP3: %s\n", bufp);
 581                 } else
 582                         ok = PS_PROTOCOL;
 583
 584                 if (argbuf)
 585                         strcpy(argbuf, bufp);
 586         }
 587
 588         return ok;
 589 }
 590
 591 static void pop3_gen_send(SockInfo *sock, const gchar *format, ...)
 592 {
 593         gchar buf[POPBUFSIZE + 1];
 594         va_list args;
 595
 596         va_start(args, format);
 597         g_vsnprintf(buf, sizeof(buf) - 2, format, args);
 598         va_end(args);
 599
 600         if (!strncasecmp(buf, "PASS ", 5))
 601                 log_print("POP3> PASS ********\n");
 602         else
 603                 log_print("POP3> %s\n", buf);
 604
 605         strcat(buf, "\r\n");
 606         sock_write(sock, buf, strlen(buf));
 607 }
 608
 609 static gint pop3_gen_recv(SockInfo *sock, gchar *buf, gint size)
 610 {
 611         if (sock_gets(sock, buf, size) < 0) {
 612                 return PS_SOCKET;
 613         } else {
 614                 strretchomp(buf);
 615                 log_print("POP3< %s\n", buf);
 616
 617                 return PS_SUCCESS;
 618         }
 619 }
 620
 621 static void pop3_sd_new_header(Pop3State *state)
 622 {
 623         HeaderItems *new_msg;
 624         if (state->cur_msg <= state->count) {
 625                 new_msg = g_new0(HeaderItems, 1);
 626
 627                 new_msg->index              = state->cur_msg;
 628                 new_msg->state              = SD_UNCHECKED;
 629                 new_msg->size               = state->msg[state->cur_msg].size;
 630                 new_msg->received           = state->msg[state->cur_msg].received;
 631                 new_msg->del_by_old_session = FALSE;
 632
 633                 state->ac_prefs->msg_list = g_slist_append(state->ac_prefs->msg_list,
 634                                                            new_msg);
 635         }
 636 }
 637
 638 gboolean pop3_sd_state(Pop3State *state, gint cur_state, guint *next_state)
 639 {
 640         gint session = state->ac_prefs->session;
 641         guint goto_state = -1;
 642
 643         switch (cur_state) {
 644         case POP3_GETRANGE_UIDL_RECV:
 645                 switch (session) {
 646                 case STYPE_DOWNLOAD:
 647                 case STYPE_DELETE:
 648                 case STYPE_PREVIEW_ALL:
 649                         goto_state = POP3_GETSIZE_LIST_SEND;
 650                 default:
 651                         break;
 652                 }
 653                 break;
 654         case POP3_GETSIZE_LIST_RECV:
 655                 switch (session) {
 656                 case STYPE_PREVIEW_ALL:
 657                         state->cur_msg = 1;
 658                 case STYPE_PREVIEW_NEW:
 659                         goto_state = POP3_TOP_SEND;
 660                         break;
 661                 case STYPE_DELETE:
 662                         if (pop3_sd_get_next(state))
 663                                 goto_state = POP3_DELETE_SEND;
 664                         else
 665                                 goto_state = POP3_LOGOUT_SEND;
 666                         break;
 667                 case STYPE_DOWNLOAD:
 668                         if (pop3_sd_get_next(state))
 669                                 goto_state = POP3_RETR_SEND;
 670                         else
 671                                 goto_state = POP3_LOGOUT_SEND;
 672                 default:
 673                         break;
 674                 }
 675                 break;
 676         case POP3_TOP_RECV:
 677                 switch (session) {
 678                 case STYPE_PREVIEW_ALL:
 679                 case STYPE_PREVIEW_NEW:
 680                         pop3_sd_new_header(state);
 681                 default:
 682                         break;
 683                 }
 684                 break;
 685         case POP3_RETR_RECV:
 686                 switch (session) {
 687                 case STYPE_DOWNLOAD:
 688                         if (state->ac_prefs->sd_rmmail_on_download)
 689                                 goto_state = POP3_DELETE_SEND;
 690                         else {
 691                                 if (pop3_sd_get_next(state))
 692                                         goto_state = POP3_RETR_SEND;
 693                                 else
 694                                         goto_state = POP3_LOGOUT_SEND;
 695                         }
 696                 default:
 697                         break;
 698                 }
 699                 break;
 700         case POP3_DELETE_RECV:
 701                 switch (session) {
 702                 case STYPE_DELETE:
 703                         if (pop3_sd_get_next(state))
 704                                 goto_state = POP3_DELETE_SEND;
 705                         else
 706                                 goto_state =  POP3_LOGOUT_SEND;
 707                         break;
 708                 case STYPE_DOWNLOAD:
 709                         if (pop3_sd_get_next(state))
 710                                 goto_state = POP3_RETR_SEND;
 711                         else
 712                                 goto_state = POP3_LOGOUT_SEND;
 713                 default:
 714                         break;
 715                 }
 716         default:
 717                 break;
 718
 719         }
 720
 721         *next_state = goto_state;
 722         if (goto_state != -1)
 723                 return TRUE;
 724         else
 725                 return FALSE;
 726 }
 727
 728 gboolean pop3_sd_get_next(Pop3State *state)
 729 {
 730         GSList *cur;
 731         gint deleted_msgs = 0;
 732
 733         switch (state->ac_prefs->session) {
 734         case STYPE_DOWNLOAD:
 735         case STYPE_DELETE:
 736                 for (cur = state->ac_prefs->msg_list; cur != NULL; cur = cur->next) {
 737                         HeaderItems *items = (HeaderItems*)cur->data;
 738
 739                         if (items->del_by_old_session)
 740                                 deleted_msgs++;
 741
 742                         switch (items->state) {
 743                         case SD_REMOVE:
 744                                 items->state = SD_REMOVED;
 745                                 break;
 746                         case SD_DOWNLOAD:
 747                                 items->state = SD_DOWNLOADED;
 748                                 break;
 749                         case SD_CHECKED:
 750                                 state->cur_msg = items->index - deleted_msgs;
 751                                 if (state->ac_prefs->session == STYPE_DELETE)
 752                                         items->state = SD_REMOVE;
 753                                 else
 754                                         items->state = SD_DOWNLOAD;
 755                                 return TRUE;
 756                         default:
 757                                 break;
 758                         }
 759                 }
 760                 return FALSE;
 761         default:
 762                 return FALSE;
 763         }
 764 }