src/pop.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2001 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
  31 #include "intl.h"
  32 #include "pop.h"
  33 #include "socket.h"
  34 #include "md5.h"
  35 #include "prefs_account.h"
  36 #include "utils.h"
  37 #include "inc.h"
  38 #include "recv.h"
  39
  40 static gint pop3_ok(SockInfo *sock, gchar *argbuf);
  41 static void pop3_gen_send(SockInfo *sock, const gchar *format, ...);
  42 static gint pop3_gen_recv(SockInfo *sock, gchar *buf, gint size);
  43
  44 gint pop3_greeting_recv(SockInfo *sock, gpointer data)
  45 {
  46         Pop3State *state = (Pop3State *)data;
  47         gchar buf[POPBUFSIZE];
  48
  49         if (pop3_ok(sock, buf) == PS_SUCCESS) {
  50                 if (state->ac_prefs->protocol == A_APOP) {
  51                         state->greeting = g_strdup(buf);
  52                         return POP3_GETAUTH_APOP_SEND;
  53                 } else
  54                         return POP3_GETAUTH_USER_SEND;
  55         } else
  56                 return -1;
  57 }
  58
  59 gint pop3_getauth_user_send(SockInfo *sock, gpointer data)
  60 {
  61         Pop3State *state = (Pop3State *)data;
  62
  63         g_return_val_if_fail(state->user != NULL, -1);
  64
  65         inc_progress_update(state, POP3_GETAUTH_USER_SEND);
  66
  67         pop3_gen_send(sock, "USER %s", state->user);
  68
  69         return POP3_GETAUTH_USER_RECV;
  70 }
  71
  72 gint pop3_getauth_user_recv(SockInfo *sock, gpointer data)
  73 {
  74         if (pop3_ok(sock, NULL) == PS_SUCCESS)
  75                 return POP3_GETAUTH_PASS_SEND;
  76         else
  77                 return -1;
  78 }
  79
  80 gint pop3_getauth_pass_send(SockInfo *sock, gpointer data)
  81 {
  82         Pop3State *state = (Pop3State *)data;
  83
  84         g_return_val_if_fail(state->pass != NULL, -1);
  85
  86         pop3_gen_send(sock, "PASS %s", state->pass);
  87
  88         return POP3_GETAUTH_PASS_RECV;
  89 }
  90
  91 gint pop3_getauth_pass_recv(SockInfo *sock, gpointer data)
  92 {
  93         Pop3State *state = (Pop3State *)data;
  94
  95         if (pop3_ok(sock, NULL) == PS_SUCCESS)
  96                 return POP3_GETRANGE_STAT_SEND;
  97         else {
  98                 log_warning(_("error occurred on authentication\n"));
  99                 state->error_val = PS_AUTHFAIL;
 100                 state->inc_state = INC_AUTH_FAILED;
 101                 return -1;
 102         }
 103 }
 104
 105 gint pop3_getauth_apop_send(SockInfo *sock, gpointer data)
 106 {
 107         Pop3State *state = (Pop3State *)data;
 108         gchar *start, *end;
 109         gchar *apop_str;
 110         gchar md5sum[33];
 111
 112         g_return_val_if_fail(state->user != NULL, -1);
 113         g_return_val_if_fail(state->pass != NULL, -1);
 114
 115         inc_progress_update(state, POP3_GETAUTH_APOP_SEND);
 116
 117         if ((start = strchr(state->greeting, '<')) == NULL) {
 118                 log_warning(_("Required APOP timestamp not found "
 119                               "in greeting\n"));
 120                 return -1;
 121         }
 122
 123         if ((end = strchr(start, '>')) == NULL || end == start + 1) {
 124                 log_warning(_("Timestamp syntax error in greeting\n"));
 125                 return -1;
 126         }
 127
 128         *(end + 1) = '\0';
 129
 130         apop_str = g_strconcat(start, state->pass, NULL);
 131         md5_hex_digest(md5sum, apop_str);
 132         g_free(apop_str);
 133
 134         pop3_gen_send(sock, "APOP %s %s", state->user, md5sum);
 135
 136         return POP3_GETAUTH_APOP_RECV;
 137 }
 138
 139 gint pop3_getauth_apop_recv(SockInfo *sock, gpointer data)
 140 {
 141         Pop3State *state = (Pop3State *)data;
 142
 143         if (pop3_ok(sock, NULL) == PS_SUCCESS)
 144                 return POP3_GETRANGE_STAT_SEND;
 145         else {
 146                 log_warning(_("error occurred on authentication\n"));
 147                 state->error_val = PS_AUTHFAIL;
 148                 state->inc_state = INC_AUTH_FAILED;
 149                 return -1;
 150         }
 151 }
 152
 153 gint pop3_getrange_stat_send(SockInfo *sock, gpointer data)
 154 {
 155         Pop3State *state = (Pop3State *)data;
 156
 157         inc_progress_update(state, POP3_GETRANGE_STAT_SEND);
 158
 159         pop3_gen_send(sock, "STAT");
 160
 161         return POP3_GETRANGE_STAT_RECV;
 162 }
 163
 164 gint pop3_getrange_stat_recv(SockInfo *sock, gpointer data)
 165 {
 166         Pop3State *state = (Pop3State *)data;
 167         gchar buf[POPBUFSIZE + 1];
 168         gint ok;
 169
 170         if ((ok = pop3_ok(sock, buf)) == PS_SUCCESS) {
 171                 if (sscanf(buf, "%d %d", &state->count, &state->total_bytes)
 172                     != 2) {
 173                         log_warning(_("POP3 protocol error\n"));
 174                         return -1;
 175                 } else {
 176                         if (state->count == 0)
 177                                 return POP3_LOGOUT_SEND;
 178                         else {
 179                                 state->cur_msg = 1;
 180                                 state->new = state->count;
 181                                 if (state->ac_prefs->rmmail ||
 182                                     state->ac_prefs->getall)
 183                                         return POP3_GETSIZE_LIST_SEND;
 184                                 else
 185                                         return POP3_GETRANGE_UIDL_SEND;
 186                         }
 187                 }
 188         } else if (ok == PS_PROTOCOL)
 189                 return POP3_LOGOUT_SEND;
 190         else
 191                 return -1;
 192 }
 193
 194 gint pop3_getrange_last_send(SockInfo *sock, gpointer data)
 195 {
 196         Pop3State *state = (Pop3State *)data;
 197
 198         inc_progress_update(state, POP3_GETRANGE_LAST_SEND);
 199
 200         pop3_gen_send(sock, "LAST");
 201
 202         return POP3_GETRANGE_LAST_RECV;
 203 }
 204
 205 gint pop3_getrange_last_recv(SockInfo *sock, gpointer data)
 206 {
 207         Pop3State *state = (Pop3State *)data;
 208         gchar buf[POPBUFSIZE + 1];
 209
 210         if (pop3_ok(sock, buf) == PS_SUCCESS) {
 211                 gint last;
 212
 213                 if (sscanf(buf, "%d", &last) == 0) {
 214                         log_warning(_("POP3 protocol error\n"));
 215                         return -1;
 216                 } else {
 217                         if (state->count == last)
 218                                 return POP3_LOGOUT_SEND;
 219                         else {
 220                                 state->new = state->count - last;
 221                                 state->cur_msg = last + 1;
 222                                 return POP3_GETSIZE_LIST_SEND;
 223                         }
 224                 }
 225         } else
 226                 return POP3_GETSIZE_LIST_SEND;
 227 }
 228
 229 gint pop3_getrange_uidl_send(SockInfo *sock, gpointer data)
 230 {
 231         Pop3State *state = (Pop3State *)data;
 232
 233         inc_progress_update(state, POP3_GETRANGE_UIDL_SEND);
 234
 235         pop3_gen_send(sock, "UIDL");
 236
 237         return POP3_GETRANGE_UIDL_RECV;
 238 }
 239
 240 gint pop3_getrange_uidl_recv(SockInfo *sock, gpointer data)
 241 {
 242         Pop3State *state = (Pop3State *)data;
 243         gboolean new = FALSE;
 244         gchar buf[POPBUFSIZE];
 245         gchar id[IDLEN + 1];
 246
 247         if (pop3_ok(sock, NULL) != PS_SUCCESS) return POP3_GETRANGE_LAST_SEND;
 248
 249         if (!state->id_table) new = TRUE;
 250
 251         while (sock_gets(sock, buf, sizeof(buf)) >= 0) {
 252                 gint num;
 253
 254                 if (buf[0] == '.') break;
 255                 if (sscanf(buf, "%d %" Xstr(IDLEN) "s", &num, id) != 2)
 256                         continue;
 257
 258                 if (new == FALSE &&
 259                     g_hash_table_lookup(state->id_table, id) == NULL) {
 260                         state->new = state->count - num + 1;
 261                         state->cur_msg = num;
 262                         new = TRUE;
 263                 }
 264
 265                 if (new == TRUE)
 266                         state->new_id_list = g_slist_append
 267                                 (state->new_id_list, g_strdup(id));
 268                 else
 269                         state->id_list = g_slist_append
 270                                 (state->id_list, g_strdup(id));
 271         }
 272
 273         if (new == TRUE)
 274                 return POP3_GETSIZE_LIST_SEND;
 275         else
 276                 return POP3_LOGOUT_SEND;
 277 }
 278
 279 gint pop3_getsize_list_send(SockInfo *sock, gpointer data)
 280 {
 281         Pop3State *state = (Pop3State *)data;
 282
 283         inc_progress_update(state, POP3_GETSIZE_LIST_SEND);
 284
 285         pop3_gen_send(sock, "LIST");
 286
 287         return POP3_GETSIZE_LIST_RECV;
 288 }
 289
 290 gint pop3_getsize_list_recv(SockInfo *sock, gpointer data)
 291 {
 292         Pop3State *state = (Pop3State *)data;
 293         gchar buf[POPBUFSIZE];
 294
 295         if (pop3_ok(sock, NULL) != PS_SUCCESS) return POP3_LOGOUT_SEND;
 296
 297         state->sizes = g_new0(gint, state->count + 1);
 298         state->cur_total_bytes = 0;
 299
 300         while (sock_gets(sock, buf, sizeof(buf)) >= 0) {
 301                 guint num, size;
 302
 303                 if (buf[0] == '.') break;
 304                 if (sscanf(buf, "%u %u", &num, &size) != 2)
 305                         return -1;
 306
 307                 if (num > 0 && num <= state->count)
 308                         state->sizes[num] = size;
 309                 if (num > 0 && num < state->cur_msg)
 310                         state->cur_total_bytes += size;
 311         }
 312
 313         while (state->sizes[state->cur_msg] == 0) {
 314                 if (state->cur_msg == state->count)
 315                         return POP3_LOGOUT_SEND;
 316                 else
 317                         state->cur_msg++;
 318         }
 319
 320         return POP3_RETR_SEND;
 321 }
 322
 323 gint pop3_retr_send(SockInfo *sock, gpointer data)
 324 {
 325         Pop3State *state = (Pop3State *)data;
 326
 327         inc_progress_update(state, POP3_RETR_SEND);
 328
 329         pop3_gen_send(sock, "RETR %d", state->cur_msg);
 330
 331         return POP3_RETR_RECV;
 332 }
 333
 334 gint pop3_retr_recv(SockInfo *sock, gpointer data)
 335 {
 336         Pop3State *state = (Pop3State *)data;
 337         const gchar *file;
 338         gint ok, drop_ok;
 339
 340         if ((ok = pop3_ok(sock, NULL)) == PS_SUCCESS) {
 341                 if (recv_write_to_file(sock, (file = get_tmp_file())) < 0) {
 342                         state->inc_state = INC_NOSPACE;
 343                         return -1;
 344                 }
 345
 346                 if ((drop_ok = inc_drop_message(file, state)) < 0) {
 347                         state->inc_state = INC_ERROR;
 348                         return -1;
 349                 }
 350
 351                 state->cur_total_bytes += state->sizes[state->cur_msg];
 352                 state->cur_total_num++;
 353
 354                 if (drop_ok == 0 && state->ac_prefs->rmmail)
 355                         return POP3_DELETE_SEND;
 356
 357                 if (state->new_id_list) {
 358                         state->id_list = g_slist_append
 359                                 (state->id_list, state->new_id_list->data);
 360                         state->new_id_list =
 361                                 g_slist_remove(state->new_id_list,
 362                                                state->new_id_list->data);
 363                 }
 364
 365                 if (state->cur_msg < state->count) {
 366                         state->cur_msg++;
 367                         while (state->sizes[state->cur_msg] == 0) {
 368                                 if (state->cur_msg == state->count)
 369                                         return POP3_LOGOUT_SEND;
 370                                 else
 371                                         state->cur_msg++;
 372                         }
 373                         return POP3_RETR_SEND;
 374                 } else
 375                         return POP3_LOGOUT_SEND;
 376         } else if (ok == PS_PROTOCOL)
 377                 return POP3_LOGOUT_SEND;
 378         else
 379                 return -1;
 380 }
 381
 382 gint pop3_delete_send(SockInfo *sock, gpointer data)
 383 {
 384         Pop3State *state = (Pop3State *)data;
 385
 386         /*inc_progress_update(state, POP3_DELETE_SEND);*/
 387
 388         pop3_gen_send(sock, "DELE %d", state->cur_msg);
 389
 390         return POP3_DELETE_RECV;
 391 }
 392
 393 gint pop3_delete_recv(SockInfo *sock, gpointer data)
 394 {
 395         Pop3State *state = (Pop3State *)data;
 396         gint ok;
 397
 398         if ((ok = pop3_ok(sock, NULL)) == PS_SUCCESS) {
 399                 if (state->cur_msg < state->count) {
 400                         state->cur_msg++;
 401                         while (state->sizes[state->cur_msg] == 0) {
 402                                 if (state->cur_msg == state->count)
 403                                         return POP3_LOGOUT_SEND;
 404                                 else
 405                                         state->cur_msg++;
 406                         }
 407                         return POP3_RETR_SEND;
 408                 } else
 409                         return POP3_LOGOUT_SEND;
 410         } else if (ok == PS_PROTOCOL)
 411                 return POP3_LOGOUT_SEND;
 412         else
 413                 return -1;
 414 }
 415
 416 gint pop3_logout_send(SockInfo *sock, gpointer data)
 417 {
 418         Pop3State *state = (Pop3State *)data;
 419
 420         inc_progress_update(state, POP3_LOGOUT_SEND);
 421
 422         pop3_gen_send(sock, "QUIT");
 423
 424         return POP3_LOGOUT_RECV;
 425 }
 426
 427 gint pop3_logout_recv(SockInfo *sock, gpointer data)
 428 {
 429         if (pop3_ok(sock, NULL) == PS_SUCCESS)
 430                 return -1;
 431         else
 432                 return -1;
 433 }
 434
 435 static gint pop3_ok(SockInfo *sock, gchar *argbuf)
 436 {
 437         gint ok;
 438         gchar buf[POPBUFSIZE + 1];
 439         gchar *bufp;
 440
 441         if ((ok = pop3_gen_recv(sock, buf, sizeof(buf))) == PS_SUCCESS) {
 442                 bufp = buf;
 443                 if (*bufp == '+' || *bufp == '-')
 444                         bufp++;
 445                 else
 446                         return PS_PROTOCOL;
 447
 448                 while (isalpha(*bufp))
 449                         bufp++;
 450
 451                 if (*bufp)
 452                         *(bufp++) = '\0';
 453
 454                 if (!strcmp(buf, "+OK"))
 455                         ok = PS_SUCCESS;
 456                 else if (!strncmp(buf, "-ERR", 4)) {
 457                         if (strstr(bufp, "lock") ||
 458                                  strstr(bufp, "Lock") ||
 459                                  strstr(bufp, "LOCK") ||
 460                                  strstr(bufp, "wait"))
 461                                 ok = PS_LOCKBUSY;
 462                         else
 463                                 ok = PS_PROTOCOL;
 464
 465                         if (*bufp)
 466                                 fprintf(stderr, "POP3: %s\n", bufp);
 467                 } else
 468                         ok = PS_PROTOCOL;
 469
 470                 if (argbuf)
 471                         strcpy(argbuf, bufp);
 472         }
 473
 474         return ok;
 475 }
 476
 477 static void pop3_gen_send(SockInfo *sock, const gchar *format, ...)
 478 {
 479         gchar buf[POPBUFSIZE + 1];
 480         va_list args;
 481
 482         va_start(args, format);
 483         g_vsnprintf(buf, sizeof(buf) - 2, format, args);
 484         va_end(args);
 485
 486         if (!strncasecmp(buf, "PASS ", 5))
 487                 log_print("POP3> PASS ********\n");
 488         else
 489                 log_print("POP3> %s\n", buf);
 490
 491         strcat(buf, "\r\n");
 492         sock_write(sock, buf, strlen(buf));
 493 }
 494
 495 static gint pop3_gen_recv(SockInfo *sock, gchar *buf, gint size)
 496 {
 497         if (sock_gets(sock, buf, size) < 0) {
 498                 return PS_SOCKET;
 499         } else {
 500                 strretchomp(buf);
 501                 log_print("POP3< %s\n", buf);
 502
 503                 return PS_SUCCESS;
 504         }
 505 }