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                 state->inc_state = INC_ERROR;
 108                 return -1;
 109         }
 110 }
 111
 112 #if USE_SSL
 113 gint pop3_stls_send(SockInfo *sock, gpointer data)
 114 {
 115         pop3_gen_send(sock, "STLS");
 116
 117         return POP3_STLS_RECV;
 118 }
 119
 120 gint pop3_stls_recv(SockInfo *sock, gpointer data)
 121 {
 122         Pop3State *state = (Pop3State *)data;
 123         gint ok;
 124
 125         if ((ok = pop3_ok(sock, NULL)) == PS_SUCCESS) {
 126                 if (!ssl_init_socket_with_method(sock, SSL_METHOD_TLSv1)) {
 127                         state->error_val = PS_SOCKET;
 128                         state->inc_state = INC_ERROR;
 129                         return -1;
 130                 }
 131                 if (state->ac_prefs->protocol == A_APOP)
 132                         return POP3_GETAUTH_APOP_SEND;
 133                 else
 134                         return POP3_GETAUTH_USER_SEND;
 135         } else if (ok == PS_PROTOCOL) {
 136                 log_warning(_("can't start TLS session\n"));
 137                 state->error_val = PS_PROTOCOL;
 138                 state->inc_state = INC_ERROR;
 139                 return POP3_LOGOUT_SEND;
 140         } else {
 141                 state->inc_state = INC_ERROR;
 142                 return -1;
 143         }
 144 }
 145 #endif /* USE_SSL */
 146
 147 gint pop3_getauth_user_send(SockInfo *sock, gpointer data)
 148 {
 149         Pop3State *state = (Pop3State *)data;
 150
 151         g_return_val_if_fail(state->user != NULL, -1);
 152
 153         pop3_gen_send(sock, "USER %s", state->user);
 154
 155         return POP3_GETAUTH_USER_RECV;
 156 }
 157
 158 gint pop3_getauth_user_recv(SockInfo *sock, gpointer data)
 159 {
 160         Pop3State *state = (Pop3State *)data;
 161
 162         if (pop3_ok(sock, NULL) == PS_SUCCESS)
 163                 return POP3_GETAUTH_PASS_SEND;
 164         else {
 165                 log_warning(_("error occurred on authentication\n"));
 166                 state->error_val = PS_AUTHFAIL;
 167                 state->inc_state = INC_AUTH_FAILED;
 168                 return -1;
 169         }
 170 }
 171
 172 gint pop3_getauth_pass_send(SockInfo *sock, gpointer data)
 173 {
 174         Pop3State *state = (Pop3State *)data;
 175
 176         g_return_val_if_fail(state->pass != NULL, -1);
 177
 178         pop3_gen_send(sock, "PASS %s", state->pass);
 179
 180         return POP3_GETAUTH_PASS_RECV;
 181 }
 182
 183 gint pop3_getauth_pass_recv(SockInfo *sock, gpointer data)
 184 {
 185         Pop3State *state = (Pop3State *)data;
 186
 187         if (pop3_ok(sock, NULL) == PS_SUCCESS)
 188                 return POP3_GETRANGE_STAT_SEND;
 189         else {
 190                 log_warning(_("error occurred on authentication\n"));
 191                 state->error_val = PS_AUTHFAIL;
 192                 state->inc_state = INC_AUTH_FAILED;
 193                 return -1;
 194         }
 195 }
 196
 197 gint pop3_getauth_apop_send(SockInfo *sock, gpointer data)
 198 {
 199         Pop3State *state = (Pop3State *)data;
 200         gchar *start, *end;
 201         gchar *apop_str;
 202         gchar md5sum[33];
 203
 204         g_return_val_if_fail(state->user != NULL, -1);
 205         g_return_val_if_fail(state->pass != NULL, -1);
 206
 207         if ((start = strchr(state->greeting, '<')) == NULL) {
 208                 log_warning(_("Required APOP timestamp not found "
 209                               "in greeting\n"));
 210                 state->error_val = PS_PROTOCOL;
 211                 state->inc_state = INC_ERROR;
 212                 return -1;
 213         }
 214
 215         if ((end = strchr(start, '>')) == NULL || end == start + 1) {
 216                 log_warning(_("Timestamp syntax error in greeting\n"));
 217                 state->error_val = PS_PROTOCOL;
 218                 state->inc_state = INC_ERROR;
 219                 return -1;
 220         }
 221
 222         *(end + 1) = '\0';
 223
 224         apop_str = g_strconcat(start, state->pass, NULL);
 225         md5_hex_digest(md5sum, apop_str);
 226         g_free(apop_str);
 227
 228         pop3_gen_send(sock, "APOP %s %s", state->user, md5sum);
 229
 230         return POP3_GETAUTH_APOP_RECV;
 231 }
 232
 233 gint pop3_getauth_apop_recv(SockInfo *sock, gpointer data)
 234 {
 235         Pop3State *state = (Pop3State *)data;
 236
 237         if (pop3_ok(sock, NULL) == PS_SUCCESS)
 238                 return POP3_GETRANGE_STAT_SEND;
 239         else {
 240                 log_warning(_("error occurred on authentication\n"));
 241                 state->error_val = PS_AUTHFAIL;
 242                 state->inc_state = INC_AUTH_FAILED;
 243                 return -1;
 244         }
 245 }
 246
 247 gint pop3_getrange_stat_send(SockInfo *sock, gpointer data)
 248 {
 249         pop3_gen_send(sock, "STAT");
 250
 251         return POP3_GETRANGE_STAT_RECV;
 252 }
 253
 254 gint pop3_getrange_stat_recv(SockInfo *sock, gpointer data)
 255 {
 256         Pop3State *state = (Pop3State *)data;
 257         gchar buf[POPBUFSIZE + 1];
 258         gint ok;
 259
 260         if ((ok = pop3_ok(sock, buf)) == PS_SUCCESS) {
 261                 if (sscanf(buf, "%d %d", &state->count, &state->total_bytes)
 262                     != 2) {
 263                         log_warning(_("POP3 protocol error\n"));
 264                         state->error_val = PS_PROTOCOL;
 265                         state->inc_state = INC_ERROR;
 266                         return -1;
 267                 } else {
 268                         if (state->count == 0) {
 269                                 state->uidl_is_valid = TRUE;
 270                                 return POP3_LOGOUT_SEND;
 271                         } else {
 272                                 state->msg = g_new0
 273                                         (Pop3MsgInfo, state->count + 1);
 274                                 state->cur_msg = 1;
 275                                 return POP3_GETRANGE_UIDL_SEND;
 276                         }
 277                 }
 278         } else if (ok == PS_PROTOCOL) {
 279                 return POP3_LOGOUT_SEND;
 280         } else {
 281                 state->inc_state = INC_ERROR;
 282                 return -1;
 283         }
 284 }
 285
 286 gint pop3_getrange_last_send(SockInfo *sock, gpointer data)
 287 {
 288         pop3_gen_send(sock, "LAST");
 289
 290         return POP3_GETRANGE_LAST_RECV;
 291 }
 292
 293 gint pop3_getrange_last_recv(SockInfo *sock, gpointer data)
 294 {
 295         Pop3State *state = (Pop3State *)data;
 296         gchar buf[POPBUFSIZE + 1];
 297
 298         if (pop3_ok(sock, buf) == PS_SUCCESS) {
 299                 gint last;
 300
 301                 if (sscanf(buf, "%d", &last) == 0) {
 302                         log_warning(_("POP3 protocol error\n"));
 303                         state->error_val = PS_PROTOCOL;
 304                         state->inc_state = INC_ERROR;
 305                         return -1;
 306                 } else {
 307                         if (state->count == last)
 308                                 return POP3_LOGOUT_SEND;
 309                         else {
 310                                 state->cur_msg = last + 1;
 311                                 return POP3_GETSIZE_LIST_SEND;
 312                         }
 313                 }
 314         } else
 315                 return POP3_GETSIZE_LIST_SEND;
 316 }
 317
 318 gint pop3_getrange_uidl_send(SockInfo *sock, gpointer data)
 319 {
 320         pop3_gen_send(sock, "UIDL");
 321
 322         return POP3_GETRANGE_UIDL_RECV;
 323 }
 324
 325 gint pop3_getrange_uidl_recv(SockInfo *sock, gpointer data)
 326 {
 327         Pop3State *state = (Pop3State *)data;
 328         gboolean new = FALSE;
 329         gboolean get_all = FALSE;
 330         gchar buf[POPBUFSIZE];
 331         gchar id[IDLEN + 1];
 332         gint len;
 333         gint next_state;
 334
 335         if (!state->uidl_table) new = TRUE;
 336         if (state->ac_prefs->getall ||
 337             (state->ac_prefs->rmmail && state->ac_prefs->msg_leave_time == 0))
 338                 get_all = TRUE;
 339
 340         if (pop3_ok(sock, NULL) != PS_SUCCESS) {
 341                 /* UIDL is not supported */
 342                 if (pop3_sd_state(state, POP3_GETRANGE_UIDL_RECV, &next_state))
 343                         return next_state;
 344
 345                 if (!get_all)
 346                         return POP3_GETRANGE_LAST_SEND;
 347                 else
 348                         return POP3_GETSIZE_LIST_SEND;
 349         }
 350
 351         while ((len = sock_gets(sock, buf, sizeof(buf))) > 0) {
 352                 gint num;
 353                 time_t recv_time;
 354
 355                 if (buf[0] == '.') break;
 356                 if (sscanf(buf, "%d %" Xstr(IDLEN) "s", &num, id) != 2)
 357                         continue;
 358                 if (num <= 0 || num > state->count) continue;
 359
 360                 state->msg[num].uidl = g_strdup(id);
 361
 362                 if (!state->uidl_table) continue;
 363
 364                 recv_time = (time_t)g_hash_table_lookup(state->uidl_table, id);
 365                 state->msg[num].recv_time = recv_time;
 366
 367                 if (!get_all && recv_time != 0)
 368                         state->msg[num].received = TRUE;
 369
 370                 if (new == FALSE &&
 371                     (get_all || recv_time == 0 || state->ac_prefs->rmmail)) {
 372                         state->cur_msg = num;
 373                         new = TRUE;
 374                 }
 375         }
 376
 377         if (len < 0) {
 378                 log_error(_("Socket error\n"));
 379                 state->error_val = PS_SOCKET;
 380                 state->inc_state = INC_ERROR;
 381                 return -1;
 382         }
 383
 384         state->uidl_is_valid = TRUE;
 385         if (pop3_sd_state(state, POP3_GETRANGE_UIDL_RECV, &next_state))
 386                 return next_state;
 387
 388         if (new == TRUE)
 389                 return POP3_GETSIZE_LIST_SEND;
 390         else
 391                 return POP3_LOGOUT_SEND;
 392 }
 393
 394 gint pop3_getsize_list_send(SockInfo *sock, gpointer data)
 395 {
 396         pop3_gen_send(sock, "LIST");
 397
 398         return POP3_GETSIZE_LIST_RECV;
 399 }
 400
 401 gint pop3_getsize_list_recv(SockInfo *sock, gpointer data)
 402 {
 403         Pop3State *state = (Pop3State *)data;
 404         gchar buf[POPBUFSIZE];
 405         gint len;
 406         gint next_state;
 407
 408         if (pop3_ok(sock, NULL) != PS_SUCCESS) return POP3_LOGOUT_SEND;
 409
 410         state->cur_total_bytes = 0;
 411         state->cur_total_recv_bytes = 0;
 412
 413         while ((len = sock_gets(sock, buf, sizeof(buf))) > 0) {
 414                 guint num, size;
 415
 416                 if (buf[0] == '.') break;
 417                 if (sscanf(buf, "%u %u", &num, &size) != 2) {
 418                         state->error_val = PS_PROTOCOL;
 419                         state->inc_state = INC_ERROR;
 420                         return -1;
 421                 }
 422
 423                 if (num > 0 && num <= state->count)
 424                         state->msg[num].size = size;
 425                 if (num > 0 && num < state->cur_msg)
 426                         state->cur_total_bytes += size;
 427         }
 428
 429         if (len < 0) {
 430                 log_error(_("Socket error\n"));
 431                 state->error_val = PS_SOCKET;
 432                 state->inc_state = INC_ERROR;
 433                 return -1;
 434         }
 435
 436         if (pop3_sd_state(state, POP3_GETSIZE_LIST_RECV, &next_state))
 437                 return next_state;
 438
 439         LOOKUP_NEXT_MSG();
 440         return POP3_RETR_SEND;
 441 }
 442
 443 gint pop3_top_send(SockInfo *sock, gpointer data)
 444 {
 445         Pop3State *state = (Pop3State *)data;
 446
 447         inc_progress_update(state, POP3_TOP_SEND);
 448
 449         pop3_gen_send(sock, "TOP %i 0", state->cur_msg );
 450
 451         return POP3_TOP_RECV;
 452 }
 453
 454 gint pop3_top_recv(SockInfo *sock, gpointer data)
 455 {
 456         Pop3State *state = (Pop3State *)data;
 457         gchar *filename, *path;
 458         gint next_state;
 459
 460         if (pop3_ok(sock, NULL) != PS_SUCCESS)
 461                 return POP3_LOGOUT_SEND;
 462
 463         path = g_strconcat(get_header_cache_dir(), G_DIR_SEPARATOR_S, NULL);
 464
 465         if ( !is_dir_exist(path) )
 466                 make_dir_hier(path);
 467
 468         filename = g_strdup_printf("%s%i", path, state->cur_msg);
 469
 470         if (recv_write_to_file(sock, filename) < 0) {
 471                 state->inc_state = INC_NOSPACE;
 472                 return -1;
 473         }
 474
 475         pop3_sd_state(state, POP3_TOP_RECV, &next_state);
 476
 477         if (state->cur_msg < state->count) {
 478                 state->cur_msg++;
 479                 return POP3_TOP_SEND;
 480         } else
 481                 return POP3_LOGOUT_SEND;
 482 }
 483
 484 gint pop3_retr_send(SockInfo *sock, gpointer data)
 485 {
 486         Pop3State *state = (Pop3State *)data;
 487
 488         pop3_gen_send(sock, "RETR %d", state->cur_msg);
 489
 490         return POP3_RETR_RECV;
 491 }
 492
 493 gint pop3_retr_recv(SockInfo *sock, gpointer data)
 494 {
 495         Pop3State *state = (Pop3State *)data;
 496         gchar *file;
 497         gint ok, drop_ok;
 498         gint next_state;
 499         if ((ok = pop3_ok(sock, NULL)) == PS_SUCCESS) {
 500                 file = get_tmp_file();
 501                 if (recv_write_to_file(sock, file) < 0) {
 502                         g_free(file);
 503                         if (state->inc_state == INC_SUCCESS)
 504                                 state->inc_state = INC_NOSPACE;
 505                         return -1;
 506                 }
 507
 508                 drop_ok = inc_drop_message(file, state);
 509                 g_free(file);
 510                 if (drop_ok < 0) {
 511                         state->inc_state = INC_ERROR;
 512                         return -1;
 513                 }
 514
 515                 if (pop3_sd_state(state, POP3_RETR_RECV, &next_state))
 516                         return next_state;
 517
 518                 state->cur_total_bytes += state->msg[state->cur_msg].size;
 519                 state->cur_total_recv_bytes += state->msg[state->cur_msg].size;
 520                 state->cur_total_num++;
 521
 522                 state->msg[state->cur_msg].received = TRUE;
 523                 state->msg[state->cur_msg].recv_time = state->current_time;
 524
 525                 if (state->ac_prefs->rmmail &&
 526                     state->ac_prefs->msg_leave_time == 0)
 527                         return POP3_DELETE_SEND;
 528
 529                 if (state->cur_msg < state->count) {
 530                         state->cur_msg++;
 531                         LOOKUP_NEXT_MSG();
 532                         return POP3_RETR_SEND;
 533                 } else
 534                         return POP3_LOGOUT_SEND;
 535         } else if (ok == PS_PROTOCOL) {
 536                 return POP3_LOGOUT_SEND;
 537         } else {
 538                 state->inc_state = INC_ERROR;
 539                 return -1;
 540         }
 541 }
 542
 543 gint pop3_delete_send(SockInfo *sock, gpointer data)
 544 {
 545         Pop3State *state = (Pop3State *)data;
 546
 547         pop3_gen_send(sock, "DELE %d", state->cur_msg);
 548
 549         return POP3_DELETE_RECV;
 550 }
 551
 552 gint pop3_delete_recv(SockInfo *sock, gpointer data)
 553 {
 554         Pop3State *state = (Pop3State *)data;
 555         gint next_state;
 556         gint ok;
 557
 558         if ((ok = pop3_ok(sock, NULL)) == PS_SUCCESS) {
 559                 state->msg[state->cur_msg].deleted = TRUE;
 560
 561                 if (pop3_sd_state(state, POP3_DELETE_RECV, &next_state))
 562                         return next_state;
 563
 564                 if (state->cur_msg < state->count) {
 565                         state->cur_msg++;
 566                         LOOKUP_NEXT_MSG();
 567                         return POP3_RETR_SEND;
 568                 } else
 569                         return POP3_LOGOUT_SEND;
 570         } else if (ok == PS_PROTOCOL) {
 571                 return POP3_LOGOUT_SEND;
 572         } else {
 573                 state->inc_state = INC_ERROR;
 574                 return -1;
 575         }
 576 }
 577
 578 gint pop3_logout_send(SockInfo *sock, gpointer data)
 579 {
 580         pop3_gen_send(sock, "QUIT");
 581
 582         return POP3_LOGOUT_RECV;
 583 }
 584
 585 gint pop3_logout_recv(SockInfo *sock, gpointer data)
 586 {
 587         Pop3State *state = (Pop3State *)data;
 588
 589         if (pop3_ok(sock, NULL) != PS_SUCCESS)
 590                 state->inc_state = INC_ERROR;
 591
 592         return -1;
 593 }
 594
 595 static gint pop3_ok(SockInfo *sock, gchar *argbuf)
 596 {
 597         gint ok;
 598         gchar buf[POPBUFSIZE + 1];
 599         gchar *bufp;
 600
 601         if ((ok = pop3_gen_recv(sock, buf, sizeof(buf))) == PS_SUCCESS) {
 602                 bufp = buf;
 603                 if (*bufp == '+' || *bufp == '-')
 604                         bufp++;
 605                 else
 606                         return PS_PROTOCOL;
 607
 608                 while (isalpha(*bufp))
 609                         bufp++;
 610
 611                 if (*bufp)
 612                         *(bufp++) = '\0';
 613
 614                 if (!strcmp(buf, "+OK"))
 615                         ok = PS_SUCCESS;
 616                 else if (!strncmp(buf, "-ERR", 4)) {
 617                         if (strstr(bufp, "lock") ||
 618                                  strstr(bufp, "Lock") ||
 619                                  strstr(bufp, "LOCK") ||
 620                                  strstr(bufp, "wait"))
 621                                 ok = PS_LOCKBUSY;
 622                         else
 623                                 ok = PS_PROTOCOL;
 624
 625                         if (*bufp)
 626                                 fprintf(stderr, "POP3: %s\n", bufp);
 627                 } else
 628                         ok = PS_PROTOCOL;
 629
 630                 if (argbuf)
 631                         strcpy(argbuf, bufp);
 632         }
 633
 634         return ok;
 635 }
 636
 637 static void pop3_gen_send(SockInfo *sock, const gchar *format, ...)
 638 {
 639         gchar buf[POPBUFSIZE + 1];
 640         va_list args;
 641
 642         va_start(args, format);
 643         g_vsnprintf(buf, sizeof(buf) - 2, format, args);
 644         va_end(args);
 645
 646         if (!strncasecmp(buf, "PASS ", 5))
 647                 log_print("POP3> PASS ********\n");
 648         else
 649                 log_print("POP3> %s\n", buf);
 650
 651         strcat(buf, "\r\n");
 652         sock_write(sock, buf, strlen(buf));
 653 }
 654
 655 static gint pop3_gen_recv(SockInfo *sock, gchar *buf, gint size)
 656 {
 657         if (sock_gets(sock, buf, size) < 0) {
 658                 return PS_SOCKET;
 659         } else {
 660                 strretchomp(buf);
 661                 log_print("POP3< %s\n", buf);
 662
 663                 return PS_SUCCESS;
 664         }
 665 }
 666
 667 static void pop3_sd_new_header(Pop3State *state)
 668 {
 669         HeaderItems *new_msg;
 670         if (state->cur_msg <= state->count) {
 671                 new_msg = g_new0(HeaderItems, 1);
 672
 673                 new_msg->index              = state->cur_msg;
 674                 new_msg->state              = SD_UNCHECKED;
 675                 new_msg->size               = state->msg[state->cur_msg].size;
 676                 new_msg->received           = state->msg[state->cur_msg].received;
 677                 new_msg->del_by_old_session = FALSE;
 678
 679                 state->ac_prefs->msg_list = g_slist_append(state->ac_prefs->msg_list,
 680                                                            new_msg);
 681         }
 682 }
 683
 684 gboolean pop3_sd_state(Pop3State *state, gint cur_state, guint *next_state)
 685 {
 686         gint session = state->ac_prefs->session;
 687         guint goto_state = -1;
 688
 689         switch (cur_state) {
 690         case POP3_GETRANGE_UIDL_RECV:
 691                 switch (session) {
 692                 case STYPE_DOWNLOAD:
 693                 case STYPE_DELETE:
 694                 case STYPE_PREVIEW_ALL:
 695                         goto_state = POP3_GETSIZE_LIST_SEND;
 696                 default:
 697                         break;
 698                 }
 699                 break;
 700         case POP3_GETSIZE_LIST_RECV:
 701                 switch (session) {
 702                 case STYPE_PREVIEW_ALL:
 703                         state->cur_msg = 1;
 704                 case STYPE_PREVIEW_NEW:
 705                         goto_state = POP3_TOP_SEND;
 706                         break;
 707                 case STYPE_DELETE:
 708                         if (pop3_sd_get_next(state))
 709                                 goto_state = POP3_DELETE_SEND;
 710                         else
 711                                 goto_state = POP3_LOGOUT_SEND;
 712                         break;
 713                 case STYPE_DOWNLOAD:
 714                         if (pop3_sd_get_next(state))
 715                                 goto_state = POP3_RETR_SEND;
 716                         else
 717                                 goto_state = POP3_LOGOUT_SEND;
 718                 default:
 719                         break;
 720                 }
 721                 break;
 722         case POP3_TOP_RECV:
 723                 switch (session) {
 724                 case STYPE_PREVIEW_ALL:
 725                 case STYPE_PREVIEW_NEW:
 726                         pop3_sd_new_header(state);
 727                 default:
 728                         break;
 729                 }
 730                 break;
 731         case POP3_RETR_RECV:
 732                 switch (session) {
 733                 case STYPE_DOWNLOAD:
 734                         if (state->ac_prefs->sd_rmmail_on_download)
 735                                 goto_state = POP3_DELETE_SEND;
 736                         else {
 737                                 if (pop3_sd_get_next(state))
 738                                         goto_state = POP3_RETR_SEND;
 739                                 else
 740                                         goto_state = POP3_LOGOUT_SEND;
 741                         }
 742                 default:
 743                         break;
 744                 }
 745                 break;
 746         case POP3_DELETE_RECV:
 747                 switch (session) {
 748                 case STYPE_DELETE:
 749                         if (pop3_sd_get_next(state))
 750                                 goto_state = POP3_DELETE_SEND;
 751                         else
 752                                 goto_state =  POP3_LOGOUT_SEND;
 753                         break;
 754                 case STYPE_DOWNLOAD:
 755                         if (pop3_sd_get_next(state))
 756                                 goto_state = POP3_RETR_SEND;
 757                         else
 758                                 goto_state = POP3_LOGOUT_SEND;
 759                 default:
 760                         break;
 761                 }
 762         default:
 763                 break;
 764
 765         }
 766
 767         *next_state = goto_state;
 768         if (goto_state != -1)
 769                 return TRUE;
 770         else
 771                 return FALSE;
 772 }
 773
 774 gboolean pop3_sd_get_next(Pop3State *state)
 775 {
 776         GSList *cur;
 777         gint deleted_msgs = 0;
 778
 779         switch (state->ac_prefs->session) {
 780         case STYPE_DOWNLOAD:
 781         case STYPE_DELETE:
 782                 for (cur = state->ac_prefs->msg_list; cur != NULL; cur = cur->next) {
 783                         HeaderItems *items = (HeaderItems*)cur->data;
 784
 785                         if (items->del_by_old_session)
 786                                 deleted_msgs++;
 787
 788                         switch (items->state) {
 789                         case SD_REMOVE:
 790                                 items->state = SD_REMOVED;
 791                                 break;
 792                         case SD_DOWNLOAD:
 793                                 items->state = SD_DOWNLOADED;
 794                                 break;
 795                         case SD_CHECKED:
 796                                 state->cur_msg = items->index - deleted_msgs;
 797                                 if (state->ac_prefs->session == STYPE_DELETE)
 798                                         items->state = SD_REMOVE;
 799                                 else
 800                                         items->state = SD_DOWNLOAD;
 801                                 return TRUE;
 802                         default:
 803                                 break;
 804                         }
 805                 }
 806                 return FALSE;
 807         default:
 808                 return FALSE;
 809         }
 810 }