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 <libcitadel.h>
  34 #include "citadel.h"
  35 #include "server.h"
  36 #include "sysdep_decls.h"
  37 #include "citserver.h"
  38 #include "support.h"
  39 #include "config.h"
  40 #include "room_ops.h"
  41 #include "user_ops.h"
  42 #include "policy.h"
  43 #include "database.h"
  44 #include "msgbase.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 #include "ctdl_module.h"
  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  * imap_do_append_flags() is called by imap_append() to set any flags that
 238  * the client specified at append time.
 239  *
 240  * FIXME find a way to do these in bulk so we don't max out our db journal
 241  */
 242 void imap_do_append_flags(long new_msgnum, char *new_message_flags) {
 243         char flags[32];
 244         char this_flag[sizeof flags];
 245         int i;
 246
 247         if (new_message_flags == NULL) return;
 248         if (IsEmptyStr(new_message_flags)) return;
 249
 250         safestrncpy(flags, new_message_flags, sizeof flags);
 251
 252         for (i=0; i<num_tokens(flags, ' '); ++i) {
 253                 extract_token(this_flag, flags, i, ' ', sizeof this_flag);
 254                 if (this_flag[0] == '\\') strcpy(this_flag, &this_flag[1]);
 255                 if (!strcasecmp(this_flag, "Seen")) {
 256                         CtdlSetSeen(&new_msgnum, 1, 1, ctdlsetseen_seen,
 257                                 NULL, NULL);
 258                 }
 259                 if (!strcasecmp(this_flag, "Answered")) {
 260                         CtdlSetSeen(&new_msgnum, 1, 1, ctdlsetseen_answered,
 261                                 NULL, NULL);
 262                 }
 263         }
 264 }
 265
 266
 267 /*
 268  * This function is called by the main command loop.
 269  */
 270 void imap_append(int num_parms, char *parms[]) {
 271         long literal_length;
 272         long bytes_transferred;
 273         long stripped_length = 0;
 274         struct CtdlMessage *msg = NULL;
 275         long new_msgnum = (-1L);
 276         int ret = 0;
 277         char roomname[ROOMNAMELEN];
 278         char buf[SIZ];
 279         char savedroom[ROOMNAMELEN];
 280         int msgs, new;
 281         int i;
 282         char new_message_flags[SIZ];
 283         struct citimap *Imap;
 284
 285         if (num_parms < 4) {
 286                 cprintf("%s BAD usage error\r\n", parms[0]);
 287                 return;
 288         }
 289
 290         if ( (parms[num_parms-1][0] != '{')
 291            || (parms[num_parms-1][strlen(parms[num_parms-1])-1] != '}') )  {
 292                 cprintf("%s BAD no message literal supplied\r\n", parms[0]);
 293                 return;
 294         }
 295
 296         strcpy(new_message_flags, "");
 297         if (num_parms >= 5) {
 298                 for (i=3; i<num_parms; ++i) {
 299                         strcat(new_message_flags, parms[i]);
 300                         strcat(new_message_flags, " ");
 301                 }
 302                 stripallbut(new_message_flags, '(', ')');
 303         }
 304
 305         /* This is how we'd do this if it were relevant in our data store.
 306          * if (num_parms >= 6) {
 307          *  new_message_internaldate = parms[4];
 308          * }
 309          */
 310
 311         literal_length = atol(&parms[num_parms-1][1]);
 312         if (literal_length < 1) {
 313                 cprintf("%s BAD Message length must be at least 1.\r\n",
 314                         parms[0]);
 315                 return;
 316         }
 317
 318         Imap = IMAP;
 319         imap_free_transmitted_message();        /* just in case. */
 320         Imap->transmitted_message = malloc(literal_length + 1);
 321         if (Imap->transmitted_message == NULL) {
 322                 cprintf("%s NO Cannot allocate memory.\r\n", parms[0]);
 323                 return;
 324         }
 325         Imap->transmitted_length = literal_length;
 326
 327         cprintf("+ Transmit message now.\r\n");
 328
 329         bytes_transferred = 0;
 330
 331         ret = client_read(Imap->transmitted_message, literal_length);
 332         Imap->transmitted_message[literal_length] = 0;
 333
 334         if (ret != 1) {
 335                 cprintf("%s NO Read failed.\r\n", parms[0]);
 336                 return;
 337         }
 338
 339         /* Client will transmit a trailing CRLF after the literal (the message
 340          * text) is received.  This call to client_getln() absorbs it.
 341          */
 342         flush_output();
 343         client_getln(buf, sizeof buf);
 344
 345         /* Convert RFC822 newlines (CRLF) to Unix newlines (LF) */
 346         CtdlLogPrintf(CTDL_DEBUG, "Converting CRLF to LF\n");
 347         stripped_length = 0;
 348         for (i=0; i<literal_length; ++i) {
 349                 if (strncmp(&Imap->transmitted_message[i], "\r\n", 2)) {
 350                         Imap->transmitted_message[stripped_length++] =
 351                                 Imap->transmitted_message[i];
 352                 }
 353         }
 354         literal_length = stripped_length;
 355         Imap->transmitted_message[literal_length] = 0;  /* reterminate it */
 356
 357         CtdlLogPrintf(CTDL_DEBUG, "Converting message format\n");
 358         msg = convert_internet_message(Imap->transmitted_message);
 359         Imap->transmitted_message = NULL;
 360         Imap->transmitted_length = 0;
 361
 362         ret = imap_grabroom(roomname, parms[2], 0);
 363         if (ret != 0) {
 364                 cprintf("%s NO Invalid mailbox name or access denied\r\n",
 365                         parms[0]);
 366                 return;
 367         }
 368
 369         /*
 370          * usergoto() formally takes us to the desired room.  (If another
 371          * folder is selected, save its name so we can return there!!!!!)
 372          */
 373         if (Imap->selected) {
 374                 strcpy(savedroom, CC->room.QRname);
 375         }
 376         usergoto(roomname, 0, 0, &msgs, &new);
 377
 378         /* If the user is locally authenticated, FORCE the From: header to
 379          * show up as the real sender.  FIXME do we really want to do this?
 380          * Probably should make it site-definable or even room-definable.
 381          *
 382          * For now, we allow "forgeries" if the room is one of the user's
 383          * private mailboxes.
 384          */
 385         if (CC->logged_in) {
 386            if ( ((CC->room.QRflags & QR_MAILBOX) == 0) && (config.c_imap_keep_from == 0)) {
 387                 if (msg->cm_fields['A'] != NULL) free(msg->cm_fields['A']);
 388                 if (msg->cm_fields['N'] != NULL) free(msg->cm_fields['N']);
 389                 if (msg->cm_fields['H'] != NULL) free(msg->cm_fields['H']);
 390                 msg->cm_fields['A'] = strdup(CC->user.fullname);
 391                 msg->cm_fields['N'] = strdup(config.c_nodename);
 392                 msg->cm_fields['H'] = strdup(config.c_humannode);
 393             }
 394         }
 395
 396         /*
 397          * Can we post here?
 398          */
 399         ret = CtdlDoIHavePermissionToPostInThisRoom(buf, sizeof buf, NULL, POST_LOGGED_IN);
 400
 401         if (ret) {
 402                 /* Nope ... print an error message */
 403                 cprintf("%s NO %s\r\n", parms[0], buf);
 404         }
 405
 406         else {
 407                 /* Yes ... go ahead and post! */
 408                 if (msg != NULL) {
 409                         new_msgnum = CtdlSubmitMsg(msg, NULL, "", 0);
 410                 }
 411                 if (new_msgnum >= 0L) {
 412                         cprintf("%s OK [APPENDUID %ld %ld] APPEND completed\r\n",
 413                                 parms[0], GLOBAL_UIDVALIDITY_VALUE, new_msgnum);
 414                 }
 415                 else {
 416                         cprintf("%s BAD Error %ld saving message to disk.\r\n",
 417                                 parms[0], new_msgnum);
 418                 }
 419         }
 420
 421         /*
 422          * IMAP protocol response to client has already been sent by now.
 423          *
 424          * If another folder is selected, go back to that room so we can resume
 425          * our happy day without violent explosions.
 426          */
 427         if (Imap->selected) {
 428                 usergoto(savedroom, 0, 0, &msgs, &new);
 429         }
 430
 431         /* We don't need this buffer anymore */
 432         CtdlFreeMessage(msg);
 433
 434         if (new_message_flags != NULL) {
 435                 imap_do_append_flags(new_msgnum, new_message_flags);
 436         }
 437 }