citadel/modules/imap/imap_misc.c

   1 /*
   2  * $Id$
   3  *
   4  *
   5  */
   6
   7
   8 #include "sysdep.h"
   9 #include <stdlib.h>
  10 #include <unistd.h>
  11 #include <stdio.h>
  12 #include <fcntl.h>
  13 #include <signal.h>
  14 #include <pwd.h>
  15 #include <errno.h>
  16 #include <sys/types.h>
  17
  18 #if TIME_WITH_SYS_TIME
  19 # include <sys/time.h>
  20 # include <time.h>
  21 #else
  22 # if HAVE_SYS_TIME_H
  23 #  include <sys/time.h>
  24 # else
  25 #  include <time.h>
  26 # endif
  27 #endif
  28
  29 #include <sys/wait.h>
  30 #include <ctype.h>
  31 #include <string.h>
  32 #include <limits.h>
  33 #include "citadel.h"
  34 #include "server.h"
  35 #include "sysdep_decls.h"
  36 #include "citserver.h"
  37 #include "support.h"
  38 #include "config.h"
  39 #include "room_ops.h"
  40 #include "user_ops.h"
  41 #include "policy.h"
  42 #include "database.h"
  43 #include "msgbase.h"
  44 #include "tools.h"
  45 #include "internet_addressing.h"
  46 #include "serv_imap.h"
  47 #include "imap_tools.h"
  48 #include "imap_fetch.h"
  49 #include "imap_misc.h"
  50 #include "genstamp.h"
  51
  52
  53
  54
  55
  56
  57 /*
  58  * imap_copy() calls imap_do_copy() to do its actual work, once it's
  59  * validated and boiled down the request a bit.  (returns 0 on success)
  60  */
  61 int imap_do_copy(char *destination_folder) {
  62         int i;
  63         char roomname[ROOMNAMELEN];
  64         struct ctdlroom qrbuf;
  65         long *selected_msgs = NULL;
  66         int num_selected = 0;
  67
  68         if (IMAP->num_msgs < 1) {
  69                 return(0);
  70         }
  71
  72         i = imap_grabroom(roomname, destination_folder, 0);
  73         if (i != 0) return(i);
  74
  75         /*
  76          * Copy all the message pointers in one shot.
  77          */
  78         selected_msgs = malloc(sizeof(long) * IMAP->num_msgs);
  79         if (selected_msgs == NULL) return(-1);
  80
  81         for (i = 0; i < IMAP->num_msgs; ++i) {
  82                 if (IMAP->flags[i] & IMAP_SELECTED) {
  83                         selected_msgs[num_selected++] = IMAP->msgids[i];
  84                 }
  85         }
  86
  87         if (num_selected > 0) {
  88                 CtdlCopyMsgsToRoom(selected_msgs, num_selected, roomname);
  89         }
  90         free(selected_msgs);
  91
  92         /* Don't bother wasting any more time if there were no messages. */
  93         if (num_selected == 0) {
  94                 return(0);
  95         }
  96
  97         /* Enumerate lists of messages for which flags are toggled */
  98         long *seen_yes = NULL;
  99         int num_seen_yes = 0;
 100         long *seen_no = NULL;
 101         int num_seen_no = 0;
 102         long *answ_yes = NULL;
 103         int num_answ_yes = 0;
 104         long *answ_no = NULL;
 105         int num_answ_no = 0;
 106
 107         seen_yes = malloc(num_selected * sizeof(long));
 108         seen_no = malloc(num_selected * sizeof(long));
 109         answ_yes = malloc(num_selected * sizeof(long));
 110         answ_no = malloc(num_selected * sizeof(long));
 111
 112         for (i = 0; i < IMAP->num_msgs; ++i) {
 113                 if (IMAP->flags[i] & IMAP_SELECTED) {
 114                         if (IMAP->flags[i] & IMAP_SEEN) {
 115                                 seen_yes[num_seen_yes++] = IMAP->msgids[i];
 116                         }
 117                         if ((IMAP->flags[i] & IMAP_SEEN) == 0) {
 118                                 seen_no[num_seen_no++] = IMAP->msgids[i];
 119                         }
 120                         if (IMAP->flags[i] & IMAP_ANSWERED) {
 121                                 answ_yes[num_answ_yes++] = IMAP->msgids[i];
 122                         }
 123                         if ((IMAP->flags[i] & IMAP_ANSWERED) == 0) {
 124                                 answ_no[num_answ_no++] = IMAP->msgids[i];
 125                         }
 126                 }
 127         }
 128
 129         /* Set the flags... */
 130         i = getroom(&qrbuf, roomname);
 131         if (i == 0) {
 132                 CtdlSetSeen(seen_yes, num_seen_yes, 1, ctdlsetseen_seen, NULL, &qrbuf);
 133                 CtdlSetSeen(seen_no, num_seen_no, 0, ctdlsetseen_seen, NULL, &qrbuf);
 134                 CtdlSetSeen(answ_yes, num_answ_yes, 1, ctdlsetseen_answered, NULL, &qrbuf);
 135                 CtdlSetSeen(answ_no, num_answ_no, 0, ctdlsetseen_answered, NULL, &qrbuf);
 136         }
 137
 138         free(seen_yes);
 139         free(seen_no);
 140         free(answ_yes);
 141         free(answ_no);
 142
 143         return(0);
 144 }
 145
 146
 147 /*
 148  * Output the [COPYUID xxx yyy] response code required by RFC2359
 149  * to tell the client the UID's of the messages that were copied (if any).
 150  * We are assuming that the IMAP_SELECTED flag is still set on any relevant
 151  * messages in our source room.  Since the Citadel system uses UID's that
 152  * are both globally unique and persistent across a room-to-room copy, we
 153  * can get this done quite easily.
 154  */
 155 void imap_output_copyuid_response(void) {
 156         int i;
 157         int num_output = 0;
 158
 159         for (i = 0; i < IMAP->num_msgs; ++i) {
 160                 if (IMAP->flags[i] & IMAP_SELECTED) {
 161                         ++num_output;
 162                         if (num_output == 1) {
 163                                 cprintf("[COPYUID ");
 164                         }
 165                         else if (num_output > 1) {
 166                                 cprintf(",");
 167                         }
 168                         cprintf("%ld", IMAP->msgids[i]);
 169                 }
 170         }
 171         if (num_output > 0) {
 172                 cprintf("] ");
 173         }
 174 }
 175
 176
 177 /*
 178  * This function is called by the main command loop.
 179  */
 180 void imap_copy(int num_parms, char *parms[]) {
 181         int ret;
 182
 183         if (num_parms != 4) {
 184                 cprintf("%s BAD invalid parameters\r\n", parms[0]);
 185                 return;
 186         }
 187
 188         if (imap_is_message_set(parms[2])) {
 189                 imap_pick_range(parms[2], 0);
 190         }
 191         else {
 192                 cprintf("%s BAD invalid parameters\r\n", parms[0]);
 193                 return;
 194         }
 195
 196         ret = imap_do_copy(parms[3]);
 197         if (!ret) {
 198                 cprintf("%s OK ", parms[0]);
 199                 imap_output_copyuid_response();
 200                 cprintf("COPY completed\r\n");
 201         }
 202         else {
 203                 cprintf("%s NO COPY failed (error %d)\r\n", parms[0], ret);
 204         }
 205 }
 206
 207 /*
 208  * This function is called by the main command loop.
 209  */
 210 void imap_uidcopy(int num_parms, char *parms[]) {
 211
 212         if (num_parms != 5) {
 213                 cprintf("%s BAD invalid parameters\r\n", parms[0]);
 214                 return;
 215         }
 216
 217         if (imap_is_message_set(parms[3])) {
 218                 imap_pick_range(parms[3], 1);
 219         }
 220         else {
 221                 cprintf("%s BAD invalid parameters\r\n", parms[0]);
 222                 return;
 223         }
 224
 225         if (imap_do_copy(parms[4]) == 0) {
 226                 cprintf("%s OK ", parms[0]);
 227                 imap_output_copyuid_response();
 228                 cprintf("UID COPY completed\r\n");
 229         }
 230         else {
 231                 cprintf("%s NO UID COPY failed\r\n", parms[0]);
 232         }
 233 }
 234
 235
 236 /*
 237  * Poll for instant messages (yeah, we can do this in IMAP ... I think)
 238  */
 239 void imap_print_instant_messages(void) {
 240         struct ExpressMessage *ptr, *holdptr;
 241         char *dumpomatic = NULL;
 242         char tmp[SIZ];
 243         int i;
 244         size_t size, size2;
 245         struct tm stamp;
 246
 247         if (CC->FirstExpressMessage == NULL) {
 248                 return;
 249         }
 250         begin_critical_section(S_SESSION_TABLE);
 251         ptr = CC->FirstExpressMessage;
 252         CC->FirstExpressMessage = NULL;
 253         end_critical_section(S_SESSION_TABLE);
 254
 255         while (ptr != NULL) {
 256                 localtime_r(&(ptr->timestamp), &stamp);
 257                 size = strlen(ptr->text) + SIZ;
 258                 dumpomatic = malloc(size);
 259                 strcpy(dumpomatic, "");
 260                 if (ptr->flags && EM_BROADCAST)
 261                         strcat(dumpomatic, "Broadcast message ");
 262                 else if (ptr->flags && EM_CHAT)
 263                         strcat(dumpomatic, "Chat request ");
 264                 else if (ptr->flags && EM_GO_AWAY)
 265                         strcat(dumpomatic, "Please logoff now, as requested ");
 266                 else
 267                         strcat(dumpomatic, "Message ");
 268
 269                 /* Timestamp.  Can this be improved? */
 270                 if (stamp.tm_hour == 0 || stamp.tm_hour == 12)
 271                         sprintf(tmp, "at 12:%02d%cm",
 272                                 stamp.tm_min,
 273                                 stamp.tm_hour ? 'p' : 'a');
 274                 else if (stamp.tm_hour > 12)            /* pm */
 275                         sprintf(tmp, "at %d:%02dpm",
 276                                 stamp.tm_hour - 12,
 277                                 stamp.tm_min);
 278                 else                                    /* am */
 279                         sprintf(tmp, "at %d:%02dam",
 280                                 stamp.tm_hour, stamp.tm_min);
 281                 strcat(dumpomatic, tmp);
 282
 283                 size2 = strlen(dumpomatic);
 284                 snprintf(&dumpomatic[size2], size - size2,
 285                         " from %s:\n", ptr->sender);
 286                 if (ptr->text != NULL)
 287                         strcat(dumpomatic, ptr->text);
 288
 289                 holdptr = ptr->next;
 290                 if (ptr->text != NULL) free(ptr->text);
 291                 free(ptr);
 292                 ptr = holdptr;
 293
 294                 for (i=0; dumpomatic[i]; ++i) {
 295                         if (!isprint(dumpomatic[i])) dumpomatic[i] = ' ';
 296                         if (dumpomatic[i]=='\\') dumpomatic[i]='/';
 297                         if (dumpomatic[i]=='\"') dumpomatic[i]='\'';
 298                 }
 299
 300                 cprintf("* OK [ALERT] %s\r\n", dumpomatic);
 301                 free(dumpomatic);
 302         }
 303         cprintf("000\n");
 304 }
 305
 306
 307 /*
 308  * imap_do_append_flags() is called by imap_append() to set any flags that
 309  * the client specified at append time.
 310  *
 311  * FIXME find a way to do these in bulk so we don't max out our db journal
 312  */
 313 void imap_do_append_flags(long new_msgnum, char *new_message_flags) {
 314         char flags[32];
 315         char this_flag[sizeof flags];
 316         int i;
 317
 318         if (new_message_flags == NULL) return;
 319         if (IsEmptyStr(new_message_flags)) return;
 320
 321         safestrncpy(flags, new_message_flags, sizeof flags);
 322
 323         for (i=0; i<num_tokens(flags, ' '); ++i) {
 324                 extract_token(this_flag, flags, i, ' ', sizeof this_flag);
 325                 if (this_flag[0] == '\\') strcpy(this_flag, &this_flag[1]);
 326                 if (!strcasecmp(this_flag, "Seen")) {
 327                         CtdlSetSeen(&new_msgnum, 1, 1, ctdlsetseen_seen,
 328                                 NULL, NULL);
 329                 }
 330                 if (!strcasecmp(this_flag, "Answered")) {
 331                         CtdlSetSeen(&new_msgnum, 1, 1, ctdlsetseen_answered,
 332                                 NULL, NULL);
 333                 }
 334         }
 335 }
 336
 337
 338 /*
 339  * This function is called by the main command loop.
 340  */
 341 void imap_append(int num_parms, char *parms[]) {
 342         long literal_length;
 343         long bytes_transferred;
 344         long stripped_length = 0;
 345         struct CtdlMessage *msg = NULL;
 346         long new_msgnum = (-1L);
 347         int ret = 0;
 348         char roomname[ROOMNAMELEN];
 349         char buf[SIZ];
 350         char savedroom[ROOMNAMELEN];
 351         int msgs, new;
 352         int i;
 353         char new_message_flags[SIZ];
 354
 355         if (num_parms < 4) {
 356                 cprintf("%s BAD usage error\r\n", parms[0]);
 357                 return;
 358         }
 359
 360         if ( (parms[num_parms-1][0] != '{')
 361            || (parms[num_parms-1][strlen(parms[num_parms-1])-1] != '}') )  {
 362                 cprintf("%s BAD no message literal supplied\r\n", parms[0]);
 363                 return;
 364         }
 365
 366         strcpy(new_message_flags, "");
 367         if (num_parms >= 5) {
 368                 for (i=3; i<num_parms; ++i) {
 369                         strcat(new_message_flags, parms[i]);
 370                         strcat(new_message_flags, " ");
 371                 }
 372                 stripallbut(new_message_flags, '(', ')');
 373         }
 374
 375         /* This is how we'd do this if it were relevant in our data store.
 376          * if (num_parms >= 6) {
 377          *  new_message_internaldate = parms[4];
 378          * }
 379          */
 380
 381         literal_length = atol(&parms[num_parms-1][1]);
 382         if (literal_length < 1) {
 383                 cprintf("%s BAD Message length must be at least 1.\r\n",
 384                         parms[0]);
 385                 return;
 386         }
 387
 388         imap_free_transmitted_message();        /* just in case. */
 389         IMAP->transmitted_message = malloc(literal_length + 1);
 390         if (IMAP->transmitted_message == NULL) {
 391                 cprintf("%s NO Cannot allocate memory.\r\n", parms[0]);
 392                 return;
 393         }
 394         IMAP->transmitted_length = literal_length;
 395
 396         cprintf("+ Transmit message now.\r\n");
 397
 398         bytes_transferred = 0;
 399
 400         ret = client_read(IMAP->transmitted_message, literal_length);
 401         IMAP->transmitted_message[literal_length] = 0;
 402
 403         if (ret != 1) {
 404                 cprintf("%s NO Read failed.\r\n", parms[0]);
 405                 return;
 406         }
 407
 408         /* Client will transmit a trailing CRLF after the literal (the message
 409          * text) is received.  This call to client_getln() absorbs it.
 410          */
 411         flush_output();
 412         client_getln(buf, sizeof buf);
 413
 414         /* Convert RFC822 newlines (CRLF) to Unix newlines (LF) */
 415         lprintf(CTDL_DEBUG, "Converting CRLF to LF\n");
 416         stripped_length = 0;
 417         for (i=0; i<literal_length; ++i) {
 418                 if (strncmp(&IMAP->transmitted_message[i], "\r\n", 2)) {
 419                         IMAP->transmitted_message[stripped_length++] =
 420                                 IMAP->transmitted_message[i];
 421                 }
 422         }
 423         literal_length = stripped_length;
 424         IMAP->transmitted_message[literal_length] = 0;  /* reterminate it */
 425
 426         lprintf(CTDL_DEBUG, "Converting message format\n");
 427         msg = convert_internet_message(IMAP->transmitted_message);
 428         IMAP->transmitted_message = NULL;
 429         IMAP->transmitted_length = 0;
 430
 431         ret = imap_grabroom(roomname, parms[2], 0);
 432         if (ret != 0) {
 433                 cprintf("%s NO Invalid mailbox name or access denied\r\n",
 434                         parms[0]);
 435                 return;
 436         }
 437
 438         /*
 439          * usergoto() formally takes us to the desired room.  (If another
 440          * folder is selected, save its name so we can return there!!!!!)
 441          */
 442         if (IMAP->selected) {
 443                 strcpy(savedroom, CC->room.QRname);
 444         }
 445         usergoto(roomname, 0, 0, &msgs, &new);
 446
 447         /* If the user is locally authenticated, FORCE the From: header to
 448          * show up as the real sender.  FIXME do we really want to do this?
 449          * Probably should make it site-definable or even room-definable.
 450          *
 451          * For now, we allow "forgeries" if the room is one of the user's
 452          * private mailboxes.
 453          */
 454         if (CC->logged_in) {
 455            if ( (CC->room.QRflags & QR_MAILBOX) == 0) {
 456                 if (msg->cm_fields['A'] != NULL) free(msg->cm_fields['A']);
 457                 if (msg->cm_fields['N'] != NULL) free(msg->cm_fields['N']);
 458                 if (msg->cm_fields['H'] != NULL) free(msg->cm_fields['H']);
 459                 msg->cm_fields['A'] = strdup(CC->user.fullname);
 460                 msg->cm_fields['N'] = strdup(config.c_nodename);
 461                 msg->cm_fields['H'] = strdup(config.c_humannode);
 462             }
 463         }
 464
 465         /*
 466          * Can we post here?
 467          */
 468         ret = CtdlDoIHavePermissionToPostInThisRoom(buf, sizeof buf);
 469
 470         if (ret) {
 471                 /* Nope ... print an error message */
 472                 cprintf("%s NO %s\r\n", parms[0], buf);
 473         }
 474
 475         else {
 476                 /* Yes ... go ahead and post! */
 477                 if (msg != NULL) {
 478                         new_msgnum = CtdlSubmitMsg(msg, NULL, "");
 479                 }
 480                 if (new_msgnum >= 0L) {
 481                         cprintf("%s OK [APPENDUID %ld %ld] APPEND completed\r\n",
 482                                 parms[0], GLOBAL_UIDVALIDITY_VALUE, new_msgnum);
 483                 }
 484                 else {
 485                         cprintf("%s BAD Error %ld saving message to disk.\r\n",
 486                                 parms[0], new_msgnum);
 487                 }
 488         }
 489
 490         /*
 491          * IMAP protocol response to client has already been sent by now.
 492          *
 493          * If another folder is selected, go back to that room so we can resume
 494          * our happy day without violent explosions.
 495          */
 496         if (IMAP->selected) {
 497                 usergoto(savedroom, 0, 0, &msgs, &new);
 498         }
 499
 500         /* We don't need this buffer anymore */
 501         CtdlFreeMessage(msg);
 502
 503         if (new_message_flags != NULL) {
 504                 imap_do_append_flags(new_msgnum, new_message_flags);
 505         }
 506 }