citadel/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 "serv_extensions.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 "tools.h"
  46 #include "internet_addressing.h"
  47 #include "serv_imap.h"
  48 #include "imap_tools.h"
  49 #include "imap_fetch.h"
  50 #include "imap_misc.h"
  51 #include "genstamp.h"
  52
  53
  54
  55
  56
  57
  58 /*
  59  * imap_copy() calls imap_do_copy() to do its actual work, once it's
  60  * validated and boiled down the request a bit.  (returns 0 on success)
  61  */
  62 int imap_do_copy(char *destination_folder) {
  63         int i;
  64         char roomname[ROOMNAMELEN];
  65
  66         i = imap_grabroom(roomname, destination_folder, 0);
  67         if (i != 0) return(i);
  68
  69         if (IMAP->num_msgs > 0) {
  70                 for (i = 0; i < IMAP->num_msgs; ++i) {
  71                         if (IMAP->flags[i] & IMAP_SELECTED) {
  72                                 CtdlCopyMsgToRoom(
  73                                         IMAP->msgids[i], roomname);
  74                         }
  75                 }
  76         }
  77
  78         return(0);
  79 }
  80
  81
  82 /*
  83  * This function is called by the main command loop.
  84  */
  85 void imap_copy(int num_parms, char *parms[]) {
  86         int ret;
  87
  88         if (num_parms != 4) {
  89                 cprintf("%s BAD invalid parameters\r\n", parms[0]);
  90                 return;
  91         }
  92
  93         if (imap_is_message_set(parms[2])) {
  94                 imap_pick_range(parms[2], 0);
  95         }
  96         else {
  97                 cprintf("%s BAD invalid parameters\r\n", parms[0]);
  98                 return;
  99         }
 100
 101         ret = imap_do_copy(parms[3]);
 102         if (!ret) {
 103                 cprintf("%s OK COPY completed\r\n", parms[0]);
 104         }
 105         else {
 106                 cprintf("%s NO COPY failed (error %d)\r\n", parms[0], ret);
 107         }
 108 }
 109
 110 /*
 111  * This function is called by the main command loop.
 112  */
 113 void imap_uidcopy(int num_parms, char *parms[]) {
 114
 115         if (num_parms != 5) {
 116                 cprintf("%s BAD invalid parameters\r\n", parms[0]);
 117                 return;
 118         }
 119
 120         if (imap_is_message_set(parms[3])) {
 121                 imap_pick_range(parms[3], 1);
 122         }
 123         else {
 124                 cprintf("%s BAD invalid parameters\r\n", parms[0]);
 125                 return;
 126         }
 127
 128         if (imap_do_copy(parms[4]) == 0) {
 129                 cprintf("%s OK UID COPY completed\r\n", parms[0]);
 130         }
 131         else {
 132                 cprintf("%s NO UID COPY failed\r\n", parms[0]);
 133         }
 134 }
 135
 136
 137 /*
 138  * Poll for instant messages (yeah, we can do this in IMAP ... I think)
 139  */
 140 void imap_print_instant_messages(void) {
 141         struct ExpressMessage *ptr, *holdptr;
 142         char *dumpomatic = NULL;
 143         char tmp[SIZ];
 144         int i;
 145         size_t size, size2;
 146         struct tm stamp;
 147
 148         if (CC->FirstExpressMessage == NULL) {
 149                 return;
 150         }
 151         begin_critical_section(S_SESSION_TABLE);
 152         ptr = CC->FirstExpressMessage;
 153         CC->FirstExpressMessage = NULL;
 154         end_critical_section(S_SESSION_TABLE);
 155
 156         while (ptr != NULL) {
 157                 localtime_r(&(ptr->timestamp), &stamp);
 158                 size = strlen(ptr->text) + SIZ;
 159                 dumpomatic = malloc(size);
 160                 strcpy(dumpomatic, "");
 161                 if (ptr->flags && EM_BROADCAST)
 162                         strcat(dumpomatic, "Broadcast message ");
 163                 else if (ptr->flags && EM_CHAT)
 164                         strcat(dumpomatic, "Chat request ");
 165                 else if (ptr->flags && EM_GO_AWAY)
 166                         strcat(dumpomatic, "Please logoff now, as requested ");
 167                 else
 168                         strcat(dumpomatic, "Message ");
 169
 170                 /* Timestamp.  Can this be improved? */
 171                 if (stamp.tm_hour == 0 || stamp.tm_hour == 12)
 172                         sprintf(tmp, "at 12:%02d%cm",
 173                                 stamp.tm_min,
 174                                 stamp.tm_hour ? 'p' : 'a');
 175                 else if (stamp.tm_hour > 12)            /* pm */
 176                         sprintf(tmp, "at %d:%02dpm",
 177                                 stamp.tm_hour - 12,
 178                                 stamp.tm_min);
 179                 else                                    /* am */
 180                         sprintf(tmp, "at %d:%02dam",
 181                                 stamp.tm_hour, stamp.tm_min);
 182                 strcat(dumpomatic, tmp);
 183
 184                 size2 = strlen(dumpomatic);
 185                 snprintf(&dumpomatic[size2], size - size2,
 186                         " from %s:\n", ptr->sender);
 187                 if (ptr->text != NULL)
 188                         strcat(dumpomatic, ptr->text);
 189
 190                 holdptr = ptr->next;
 191                 if (ptr->text != NULL) free(ptr->text);
 192                 free(ptr);
 193                 ptr = holdptr;
 194
 195                 for (i=0; i<strlen(dumpomatic); ++i) {
 196                         if (!isprint(dumpomatic[i])) dumpomatic[i] = ' ';
 197                         if (dumpomatic[i]=='\\') dumpomatic[i]='/';
 198                         if (dumpomatic[i]=='\"') dumpomatic[i]='\'';
 199                 }
 200
 201                 cprintf("* OK [ALERT] %s\r\n", dumpomatic);
 202                 free(dumpomatic);
 203         }
 204         cprintf("000\n");
 205 }
 206
 207
 208 /*
 209  * imap_do_append_flags() is called by imap_append() to set any flags that
 210  * the client specified at append time.
 211  *
 212  * FIXME find a way to do these in bulk so we don't max out our db journal
 213  */
 214 void imap_do_append_flags(long new_msgnum, char *new_message_flags) {
 215         char flags[32];
 216         char this_flag[sizeof flags];
 217         int i;
 218
 219         if (new_message_flags == NULL) return;
 220
 221         safestrncpy(flags, new_message_flags, sizeof flags);
 222         stripallbut(flags, '(', ')');
 223
 224         for (i=0; i<num_tokens(flags, ' '); ++i) {
 225                 extract_token(this_flag, flags, i, ' ');
 226                 lprintf(CTDL_DEBUG, "setting flag <%s>\n", this_flag);
 227                 if (this_flag[0] == '\\') strcpy(this_flag, &this_flag[1]);
 228                 if (!strcasecmp(this_flag, "Seen")) {
 229                         CtdlSetSeen(new_msgnum, 1, ctdlsetseen_seen);
 230                 }
 231                 if (!strcasecmp(this_flag, "Answered")) {
 232                         CtdlSetSeen(new_msgnum, 1, ctdlsetseen_answered);
 233                 }
 234         }
 235 }
 236
 237
 238 /*
 239  * This function is called by the main command loop.
 240  */
 241 void imap_append(int num_parms, char *parms[]) {
 242         long literal_length;
 243         long bytes_transferred;
 244         long stripped_length = 0;
 245         struct CtdlMessage *msg;
 246         long new_msgnum = (-1L);
 247         int ret = 0;
 248         size_t blksize;
 249         char roomname[ROOMNAMELEN];
 250         char buf[SIZ];
 251         char savedroom[ROOMNAMELEN];
 252         int msgs, new;
 253         int i;
 254         char *new_message_flags = NULL;
 255
 256         if (num_parms < 4) {
 257                 cprintf("%s BAD usage error\r\n", parms[0]);
 258                 return;
 259         }
 260
 261         if ( (parms[num_parms-1][0] != '{')
 262            || (parms[num_parms-1][strlen(parms[num_parms-1])-1] != '}') )  {
 263                 cprintf("%s BAD no message literal supplied\r\n", parms[0]);
 264                 return;
 265         }
 266
 267         if (num_parms >= 5) {
 268                 new_message_flags = parms[3];
 269         }
 270
 271         /* This is how we'd do this if it were relevant in our data store.
 272          * if (num_parms >= 6) {
 273          *  new_message_internaldate = parms[4];
 274          * }
 275          */
 276
 277         literal_length = atol(&parms[num_parms-1][1]);
 278         if (literal_length < 1) {
 279                 cprintf("%s BAD Message length must be at least 1.\r\n",
 280                         parms[0]);
 281                 return;
 282         }
 283
 284         imap_free_transmitted_message();        /* just in case. */
 285         IMAP->transmitted_message = malloc(literal_length + 1);
 286         if (IMAP->transmitted_message == NULL) {
 287                 cprintf("%s NO Cannot allocate memory.\r\n", parms[0]);
 288                 return;
 289         }
 290         IMAP->transmitted_length = literal_length;
 291
 292         cprintf("+ Transmit message now.\r\n");
 293
 294         bytes_transferred = 0;
 295
 296         do {
 297                 blksize = literal_length - bytes_transferred;
 298                 if (blksize > SIZ) blksize = SIZ;
 299
 300                 flush_output();
 301                 ret = client_read(&IMAP->transmitted_message[bytes_transferred],
 302                          blksize);
 303                 if (ret < 1) {
 304                         bytes_transferred = literal_length;     /* bail out */
 305                 }
 306                 else {
 307                         bytes_transferred += blksize;           /* keep going */
 308                 }
 309         } while (bytes_transferred < literal_length);
 310
 311         IMAP->transmitted_message[literal_length] = 0;
 312         if (ret != 1) {
 313                 cprintf("%s NO Read failed.\r\n", parms[0]);
 314                 return;
 315         }
 316
 317         /* Client will transmit a trailing CRLF after the literal (the message
 318          * text) is received.  This call to client_getln() absorbs it.
 319          */
 320         flush_output();
 321         client_getln(buf, sizeof buf);
 322
 323         /* Convert RFC822 newlines (CRLF) to Unix newlines (LF) */
 324         stripped_length = 0;
 325         for (i=0; i<literal_length; ++i) {
 326                 if (strncmp(&IMAP->transmitted_message[i], "\r\n", 2)) {
 327                         IMAP->transmitted_message[stripped_length++] = IMAP->transmitted_message[i];
 328                 }
 329         }
 330         literal_length = stripped_length;
 331         IMAP->transmitted_message[literal_length] = 0;  /* reterminate it */
 332
 333         lprintf(CTDL_DEBUG, "Converting message format\n");
 334         msg = convert_internet_message(IMAP->transmitted_message);
 335         IMAP->transmitted_message = NULL;
 336         IMAP->transmitted_length = 0;
 337
 338         ret = imap_grabroom(roomname, parms[2], 0);
 339         if (ret != 0) {
 340                 cprintf("%s NO Invalid mailbox name or location, or access denied\r\n",
 341                         parms[0]);
 342                 return;
 343         }
 344
 345         /*
 346          * usergoto() formally takes us to the desired room.  (If another
 347          * folder is selected, save its name so we can return there!!!!!)
 348          */
 349         if (IMAP->selected) {
 350                 strcpy(savedroom, CC->room.QRname);
 351         }
 352         usergoto(roomname, 0, 0, &msgs, &new);
 353
 354         /* If the user is locally authenticated, FORCE the From: header to
 355          * show up as the real sender.  FIXME do we really want to do this?
 356          * Probably should make it site-definable or even room-definable.
 357          *
 358          * For now, we allow "forgeries" if the room is one of the user's
 359          * private mailboxes.
 360          */
 361         if (CC->logged_in) {
 362            if ( (CC->room.QRflags & QR_MAILBOX) == 0) {
 363                 if (msg->cm_fields['A'] != NULL) free(msg->cm_fields['A']);
 364                 if (msg->cm_fields['N'] != NULL) free(msg->cm_fields['N']);
 365                 if (msg->cm_fields['H'] != NULL) free(msg->cm_fields['H']);
 366                 msg->cm_fields['A'] = strdup(CC->user.fullname);
 367                 msg->cm_fields['N'] = strdup(config.c_nodename);
 368                 msg->cm_fields['H'] = strdup(config.c_humannode);
 369             }
 370         }
 371
 372         /*
 373          * Can we post here?
 374          */
 375         ret = CtdlDoIHavePermissionToPostInThisRoom(buf, sizeof buf);
 376
 377         if (ret) {
 378                 /* Nope ... print an error message */
 379                 cprintf("%s NO %s\r\n", parms[0], buf);
 380         }
 381
 382         else {
 383                 /* Yes ... go ahead and post! */
 384                 if (msg != NULL) {
 385                         new_msgnum = CtdlSubmitMsg(msg, NULL, "");
 386                 }
 387                 if (new_msgnum >= 0L) {
 388                         cprintf("%s OK APPEND completed\r\n", parms[0]);
 389                 }
 390                 else {
 391                         cprintf("%s BAD Error %ld saving message to disk.\r\n",
 392                                 parms[0], new_msgnum);
 393                 }
 394         }
 395
 396         /*
 397          * IMAP protocol response to client has already been sent by now.
 398          *
 399          * If another folder is selected, go back to that room so we can resume
 400          * our happy day without violent explosions.
 401          */
 402         if (IMAP->selected) {
 403                 usergoto(savedroom, 0, 0, &msgs, &new);
 404         }
 405
 406         /* We don't need this buffer anymore */
 407         CtdlFreeMessage(msg);
 408
 409         if (new_message_flags != NULL) {
 410                 imap_do_append_flags(new_msgnum, new_message_flags);
 411         }
 412 }