4 * IMAP server for the Citadel system
5 * Copyright (C) 2000-2005 by Art Cancro and others.
6 * This code is released under the terms of the GNU General Public License.
8 * WARNING: the IMAP protocol is badly designed. No implementation of it
9 * is perfect. Indeed, with so much gratuitous complexity, *all* IMAP
10 * implementations have bugs.
21 #include <sys/types.h>
23 #if TIME_WITH_SYS_TIME
24 # include <sys/time.h>
28 # include <sys/time.h>
40 #include "sysdep_decls.h"
41 #include "citserver.h"
44 #include "serv_extensions.h"
51 #include "internet_addressing.h"
52 #include "serv_imap.h"
53 #include "imap_tools.h"
54 #include "imap_fetch.h"
55 #include "imap_search.h"
56 #include "imap_store.h"
57 #include "imap_misc.h"
60 #include "serv_crypto.h"
63 /* imap_rename() uses this struct containing list of rooms to rename */
66 char irl_oldroom[ROOMNAMELEN];
67 char irl_newroom[ROOMNAMELEN];
71 /* Data which is passed between imap_rename() and imap_rename_backend() */
80 * If there is a message ID map in memory, free it
82 void imap_free_msgids(void)
84 if (IMAP->msgids != NULL) {
90 if (IMAP->flags != NULL) {
94 IMAP->last_mtime = (-1);
99 * If there is a transmitted message in memory, free it
101 void imap_free_transmitted_message(void)
103 if (IMAP->transmitted_message != NULL) {
104 free(IMAP->transmitted_message);
105 IMAP->transmitted_message = NULL;
106 IMAP->transmitted_length = 0;
112 * Set the \Seen, \Recent. and \Answered flags, based on the sequence
113 * sets stored in the visit record for this user/room. Note that we have
114 * to parse each sequence set manually here, because calling the utility
115 * function is_msg_in_sequence_set() over and over again is too expensive.
117 * first_msg should be set to 0 to rescan the flags for every message in the
118 * room, or some other value if we're only interested in an incremental
121 void imap_set_seen_flags(int first_msg)
127 char setstr[64], lostr[64], histr[64];
130 if (IMAP->num_msgs < 1) return;
131 CtdlGetRelationship(&vbuf, &CC->user, &CC->room);
133 for (i = first_msg; i < IMAP->num_msgs; ++i) {
134 IMAP->flags[i] = IMAP->flags[i] & ~IMAP_SEEN;
135 IMAP->flags[i] |= IMAP_RECENT;
136 IMAP->flags[i] = IMAP->flags[i] & ~IMAP_ANSWERED;
140 * Do the "\Seen" flag.
141 * (Any message not "\Seen" is considered "\Recent".)
143 num_sets = num_tokens(vbuf.v_seen, ',');
144 for (s=0; s<num_sets; ++s) {
145 extract_token(setstr, vbuf.v_seen, s, ',', sizeof setstr);
147 extract_token(lostr, setstr, 0, ':', sizeof lostr);
148 if (num_tokens(setstr, ':') >= 2) {
149 extract_token(histr, setstr, 1, ':', sizeof histr);
150 if (!strcmp(histr, "*")) {
151 snprintf(histr, sizeof histr, "%ld", LONG_MAX);
155 strcpy(histr, lostr);
160 for (i = first_msg; i < IMAP->num_msgs; ++i) {
161 if ((IMAP->msgids[i] >= lo) && (IMAP->msgids[i] <= hi)){
162 IMAP->flags[i] |= IMAP_SEEN;
163 IMAP->flags[i] = IMAP->flags[i] & ~IMAP_RECENT;
168 /* Do the ANSWERED flag */
169 num_sets = num_tokens(vbuf.v_answered, ',');
170 for (s=0; s<num_sets; ++s) {
171 extract_token(setstr, vbuf.v_answered, s, ',', sizeof setstr);
173 extract_token(lostr, setstr, 0, ':', sizeof lostr);
174 if (num_tokens(setstr, ':') >= 2) {
175 extract_token(histr, setstr, 1, ':', sizeof histr);
176 if (!strcmp(histr, "*")) {
177 snprintf(histr, sizeof histr, "%ld", LONG_MAX);
181 strcpy(histr, lostr);
186 for (i = first_msg; i < IMAP->num_msgs; ++i) {
187 if ((IMAP->msgids[i] >= lo) && (IMAP->msgids[i] <= hi)){
188 IMAP->flags[i] |= IMAP_ANSWERED;
198 * Back end for imap_load_msgids()
200 * Optimization: instead of calling realloc() to add each message, we
201 * allocate space in the list for REALLOC_INCREMENT messages at a time. This
202 * allows the mapping to proceed much faster.
204 void imap_add_single_msgid(long msgnum, void *userdata)
208 if (IMAP->num_msgs > IMAP->num_alloc) {
209 IMAP->num_alloc += REALLOC_INCREMENT;
210 IMAP->msgids = realloc(IMAP->msgids,
211 (IMAP->num_alloc * sizeof(long)) );
212 IMAP->flags = realloc(IMAP->flags,
213 (IMAP->num_alloc * sizeof(long)) );
215 IMAP->msgids[IMAP->num_msgs - 1] = msgnum;
216 IMAP->flags[IMAP->num_msgs - 1] = 0;
222 * Set up a message ID map for the current room (folder)
224 void imap_load_msgids(void)
226 struct cdbdata *cdbfr;
228 if (IMAP->selected == 0) {
230 "imap_load_msgids() can't run; no room selected\n");
235 imap_free_msgids(); /* If there was already a map, free it */
238 /* Load the message list */
239 cdbfr = cdb_fetch(CDB_MSGLISTS, &CC->room.QRnumber, sizeof(long));
241 IMAP->msgids = malloc(cdbfr->len);
242 memcpy(IMAP->msgids, cdbfr->ptr, cdbfr->len);
243 IMAP->num_msgs = cdbfr->len / sizeof(long);
244 IMAP->num_alloc = cdbfr->len / sizeof(long);
248 if (IMAP->num_msgs) {
249 IMAP->flags = malloc(IMAP->num_alloc * sizeof(long));
250 memset(IMAP->flags, 0, (IMAP->num_alloc * sizeof(long)) );
254 imap_set_seen_flags(0);
260 * Re-scan the selected room (folder) and see if it's been changed at all
262 void imap_rescan_msgids(void)
265 int original_num_msgs = 0;
266 long original_highest = 0L;
268 int message_still_exists;
269 struct cdbdata *cdbfr;
270 long *msglist = NULL;
274 if (IMAP->selected == 0) {
276 "imap_load_msgids() can't run; no room selected\n");
282 * Check to see if the room's contents have changed.
283 * If not, we can avoid this rescan.
285 getroom(&CC->room, CC->room.QRname);
286 if (IMAP->last_mtime == CC->room.QRmtime) { /* No changes! */
291 /* Load the *current* message list from disk, so we can compare it
292 * to what we have in memory.
294 cdbfr = cdb_fetch(CDB_MSGLISTS, &CC->room.QRnumber, sizeof(long));
296 msglist = malloc(cdbfr->len);
297 if (msglist == NULL) {
298 lprintf(CTDL_CRIT, "malloc() failed\n");
301 memcpy(msglist, cdbfr->ptr, (size_t)cdbfr->len);
302 num_msgs = cdbfr->len / sizeof(long);
310 * Check to see if any of the messages we know about have been expunged
312 if (IMAP->num_msgs > 0) {
314 for (i = 0; i < IMAP->num_msgs; ++i) {
316 message_still_exists = 0;
318 for (j = jstart; j < num_msgs; ++j) {
319 if (msglist[j] == IMAP->msgids[i]) {
320 message_still_exists = 1;
327 if (message_still_exists == 0) {
328 cprintf("* %d EXPUNGE\r\n", i + 1);
330 /* Here's some nice stupid nonsense. When a
331 * message is expunged, we have to slide all
332 * the existing messages up in the message
336 memcpy(&IMAP->msgids[i],
337 &IMAP->msgids[i + 1],
339 (IMAP->num_msgs - i)));
340 memcpy(&IMAP->flags[i],
343 (IMAP->num_msgs - i)));
353 * Remember how many messages were here before we re-scanned.
355 original_num_msgs = IMAP->num_msgs;
356 if (IMAP->num_msgs > 0) {
357 original_highest = IMAP->msgids[IMAP->num_msgs - 1];
359 original_highest = 0L;
364 * Now peruse the room for *new* messages only.
367 for (j = 0; j < num_msgs; ++j) {
368 if (msglist[j] > original_highest) {
369 imap_add_single_msgid(msglist[j], NULL);
373 imap_set_seen_flags(original_num_msgs);
377 * If new messages have arrived, tell the client about them.
379 if (IMAP->num_msgs > original_num_msgs) {
381 for (j = 0; j < num_msgs; ++j) {
382 if (IMAP->flags[j] & IMAP_RECENT) {
387 cprintf("* %d EXISTS\r\n", IMAP->num_msgs);
388 cprintf("* %d RECENT\r\n", num_recent);
395 IMAP->last_mtime = CC->room.QRmtime;
405 * This cleanup function blows away the temporary memory and files used by
408 void imap_cleanup_function(void)
411 /* Don't do this stuff if this is not a IMAP session! */
412 if (CC->h_command_function != imap_command_loop)
415 /* If there is a mailbox selected, auto-expunge it. */
416 if (IMAP->selected) {
420 lprintf(CTDL_DEBUG, "Performing IMAP cleanup hook\n");
422 imap_free_transmitted_message();
424 if (IMAP->cached_rfc822_data != NULL) {
425 free(IMAP->cached_rfc822_data);
426 IMAP->cached_rfc822_data = NULL;
427 IMAP->cached_rfc822_msgnum = (-1);
428 IMAP->cached_rfc822_withbody = 0;
431 if (IMAP->cached_body != NULL) {
432 free(IMAP->cached_body);
433 IMAP->cached_body = NULL;
434 IMAP->cached_body_len = 0;
435 IMAP->cached_bodymsgnum = (-1);
439 lprintf(CTDL_DEBUG, "Finished IMAP cleanup hook\n");
444 * Does the actual work of the CAPABILITY command (because we need to
445 * output this stuff in other places as well)
447 void imap_output_capability_string(void) {
448 cprintf("CAPABILITY IMAP4REV1 NAMESPACE AUTH=LOGIN");
450 if (!CC->redirect_ssl) cprintf(" STARTTLS");
455 * implements the CAPABILITY command
457 void imap_capability(int num_parms, char *parms[])
460 imap_output_capability_string();
462 cprintf("%s OK CAPABILITY completed\r\n", parms[0]);
468 * Here's where our IMAP session begins its happy day.
470 void imap_greeting(void)
473 strcpy(CC->cs_clientname, "IMAP session");
474 IMAP = malloc(sizeof (struct citimap));
475 memset(IMAP, 0, sizeof(struct citimap));
476 IMAP->authstate = imap_as_normal;
477 IMAP->cached_rfc822_data = NULL;
478 IMAP->cached_rfc822_msgnum = (-1);
479 IMAP->cached_rfc822_withbody = 0;
482 imap_output_capability_string();
483 cprintf("] %s IMAP4rev1 %s ready\r\n", config.c_fqdn, CITADEL);
487 * IMAPS is just like IMAP, except it goes crypto right away.
490 void imaps_greeting(void) {
491 CtdlStartTLS(NULL, NULL, NULL);
498 * implements the LOGIN command (ordinary username/password login)
500 void imap_login(int num_parms, char *parms[])
502 if (num_parms != 4) {
503 cprintf("%s BAD incorrect number of parameters\r\n", parms[0]);
507 if (CtdlLoginExistingUser(parms[2]) == login_ok) {
508 if (CtdlTryPassword(parms[3]) == pass_ok) {
509 cprintf("%s OK [", parms[0]);
510 imap_output_capability_string();
511 cprintf("] Hello, %s\r\n", CC->user.fullname);
516 cprintf("%s BAD Login incorrect\r\n", parms[0]);
521 * Implements the AUTHENTICATE command
523 void imap_authenticate(int num_parms, char *parms[])
527 if (num_parms != 3) {
528 cprintf("%s BAD incorrect number of parameters\r\n",
534 cprintf("%s BAD Already logged in.\r\n", parms[0]);
538 if (!strcasecmp(parms[2], "LOGIN")) {
539 CtdlEncodeBase64(buf, "Username:", 9);
540 cprintf("+ %s\r\n", buf);
541 IMAP->authstate = imap_as_expecting_username;
542 strcpy(IMAP->authseq, parms[0]);
547 cprintf("%s NO AUTHENTICATE %s failed\r\n",
552 void imap_auth_login_user(char *cmd)
556 CtdlDecodeBase64(buf, cmd, SIZ);
557 CtdlLoginExistingUser(buf);
558 CtdlEncodeBase64(buf, "Password:", 9);
559 cprintf("+ %s\r\n", buf);
560 IMAP->authstate = imap_as_expecting_password;
564 void imap_auth_login_pass(char *cmd)
568 CtdlDecodeBase64(buf, cmd, SIZ);
569 if (CtdlTryPassword(buf) == pass_ok) {
570 cprintf("%s OK authentication succeeded\r\n",
573 cprintf("%s NO authentication failed\r\n", IMAP->authseq);
575 IMAP->authstate = imap_as_normal;
581 * implements the STARTTLS command (Citadel API version)
584 void imap_starttls(int num_parms, char *parms[])
586 char ok_response[SIZ];
587 char nosup_response[SIZ];
588 char error_response[SIZ];
591 "%s OK begin TLS negotiation now\r\n",
593 sprintf(nosup_response,
594 "%s NO TLS not supported here\r\n",
596 sprintf(error_response,
597 "%s BAD Internal error\r\n",
599 CtdlStartTLS(ok_response, nosup_response, error_response);
605 * implements the SELECT command
607 void imap_select(int num_parms, char *parms[])
610 char augmented_roomname[ROOMNAMELEN];
614 struct ctdlroom QRscratch;
620 /* Convert the supplied folder name to a roomname */
621 i = imap_roomname(towhere, sizeof towhere, parms[2]);
623 cprintf("%s NO Invalid mailbox name.\r\n", parms[0]);
627 floornum = (i & 0x00ff);
628 roomflags = (i & 0xff00);
630 /* First try a regular match */
631 c = getroom(&QRscratch, towhere);
633 /* Then try a mailbox name match */
635 MailboxName(augmented_roomname, sizeof augmented_roomname,
637 c = getroom(&QRscratch, augmented_roomname);
639 strcpy(towhere, augmented_roomname);
642 /* If the room exists, check security/access */
644 /* See if there is an existing user/room relationship */
645 CtdlRoomAccess(&QRscratch, &CC->user, &ra, NULL);
647 /* normal clients have to pass through security */
653 /* Fail here if no such room */
655 cprintf("%s NO ... no such room, or access denied\r\n",
660 /* If we already had some other folder selected, auto-expunge it */
665 * usergoto() formally takes us to the desired room, happily returning
666 * the number of messages and number of new messages.
669 memcpy(&CC->room, &QRscratch, sizeof(struct ctdlroom));
671 usergoto(NULL, 0, 0, &msgs, &new);
676 if (!strcasecmp(parms[1], "EXAMINE")) {
685 IMAP->last_mtime = CC->room.QRmtime;
688 cprintf("* %d EXISTS\r\n", msgs);
689 cprintf("* %d RECENT\r\n", new);
691 cprintf("* OK [UIDVALIDITY 1] UID validity status\r\n");
692 cprintf("* OK [UIDNEXT %ld] Predicted next UID\r\n", CitControl.MMhighest + 1);
694 /* Note that \Deleted is a valid flag, but not a permanent flag,
695 * because we don't maintain its state across sessions. Citadel
696 * automatically expunges mailboxes when they are de-selected.
698 cprintf("* FLAGS (\\Deleted \\Seen \\Answered)\r\n");
699 cprintf("* OK [PERMANENTFLAGS (\\Seen \\Answered)] "
700 "permanent flags\r\n");
702 cprintf("%s OK [%s] %s completed\r\n",
704 (IMAP->readonly ? "READ-ONLY" : "READ-WRITE"), parms[1]);
710 * does the real work for expunge
712 int imap_do_expunge(void)
715 int num_expunged = 0;
717 lprintf(CTDL_DEBUG, "imap_do_expunge() called\n");
718 if (IMAP->selected == 0) {
722 if (IMAP->num_msgs > 0)
723 for (i = 0; i < IMAP->num_msgs; ++i) {
724 if (IMAP->flags[i] & IMAP_DELETED) {
725 CtdlDeleteMessages(CC->room.QRname,
726 IMAP->msgids[i], "");
731 if (num_expunged > 0) {
732 imap_rescan_msgids();
735 lprintf(CTDL_DEBUG, "Expunged %d messages.\n", num_expunged);
736 return (num_expunged);
741 * implements the EXPUNGE command syntax
743 void imap_expunge(int num_parms, char *parms[])
745 int num_expunged = 0;
747 num_expunged = imap_do_expunge();
748 cprintf("%s OK expunged %d messages.\r\n", parms[0], num_expunged);
753 * implements the CLOSE command
755 void imap_close(int num_parms, char *parms[])
758 /* Yes, we always expunge on close. */
759 if (IMAP->selected) {
766 cprintf("%s OK CLOSE completed\r\n", parms[0]);
771 * Implements the NAMESPACE command.
773 void imap_namespace(int num_parms, char *parms[])
780 cprintf("* NAMESPACE ");
782 /* All personal folders are subordinate to INBOX. */
783 cprintf("((\"INBOX/\" \"/\")) ");
785 /* Other users' folders ... coming soon! FIXME */
788 /* Show all floors as shared namespaces. Neato! */
790 for (i = 0; i < MAXFLOORS; ++i) {
792 if (fl->f_flags & F_INUSE) {
793 if (floors > 0) cprintf(" ");
795 sprintf(buf, "%s/", fl->f_name);
803 /* Wind it up with a newline and a completion message. */
805 cprintf("%s OK NAMESPACE completed\r\n", parms[0]);
811 * Used by LIST and LSUB to show the floors in the listing
813 void imap_list_floors(char *cmd, char *pattern)
818 for (i = 0; i < MAXFLOORS; ++i) {
820 if (fl->f_flags & F_INUSE) {
821 if (imap_mailbox_matches_pattern
822 (pattern, fl->f_name)) {
823 cprintf("* %s (\\NoSelect) \"/\" ", cmd);
824 imap_strout(fl->f_name);
834 * Back end for imap_lsub()
836 * IMAP "subscribed folder" is equivocated to Citadel "known rooms." This
837 * may or may not be the desired behavior in the future.
839 void imap_lsub_listroom(struct ctdlroom *qrbuf, void *data)
845 pattern = (char *) data;
847 /* Only list rooms to which the user has access!! */
848 CtdlRoomAccess(qrbuf, &CC->user, &ra, NULL);
850 imap_mailboxname(buf, sizeof buf, qrbuf);
851 if (imap_mailbox_matches_pattern(pattern, buf)) {
852 cprintf("* LSUB () \"/\" ");
861 * Implements the LSUB command
863 void imap_lsub(int num_parms, char *parms[])
867 cprintf("%s BAD arguments invalid\r\n", parms[0]);
870 snprintf(pattern, sizeof pattern, "%s%s", parms[2], parms[3]);
872 if (strlen(parms[3]) == 0) {
873 cprintf("* LIST (\\Noselect) \"/\" \"\"\r\n");
877 imap_list_floors("LSUB", pattern);
878 ForEachRoom(imap_lsub_listroom, pattern);
881 cprintf("%s OK LSUB completed\r\n", parms[0]);
887 * Back end for imap_list()
889 void imap_list_listroom(struct ctdlroom *qrbuf, void *data)
895 pattern = (char *) data;
897 /* Only list rooms to which the user has access!! */
898 CtdlRoomAccess(qrbuf, &CC->user, &ra, NULL);
900 || ((ra & UA_GOTOALLOWED) && (ra & UA_ZAPPED))) {
901 imap_mailboxname(buf, sizeof buf, qrbuf);
902 if (imap_mailbox_matches_pattern(pattern, buf)) {
903 cprintf("* LIST () \"/\" ");
912 * Implements the LIST command
914 void imap_list(int num_parms, char *parms[])
918 cprintf("%s BAD arguments invalid\r\n", parms[0]);
921 snprintf(pattern, sizeof pattern, "%s%s", parms[2], parms[3]);
923 if (strlen(parms[3]) == 0) {
924 cprintf("* LIST (\\Noselect) \"/\" \"\"\r\n");
928 imap_list_floors("LIST", pattern);
929 ForEachRoom(imap_list_listroom, pattern);
932 cprintf("%s OK LIST completed\r\n", parms[0]);
938 * Implements the CREATE command
941 void imap_create(int num_parms, char *parms[])
944 char roomname[ROOMNAMELEN];
950 if (strchr(parms[2], '\\') != NULL) {
951 cprintf("%s NO Invalid character in folder name\r\n",
953 lprintf(CTDL_DEBUG, "invalid character in folder name\n");
957 ret = imap_roomname(roomname, sizeof roomname, parms[2]);
959 cprintf("%s NO Invalid mailbox name or location\r\n",
961 lprintf(CTDL_DEBUG, "invalid mailbox name or location\n");
964 floornum = (ret & 0x00ff); /* lower 8 bits = floor number */
965 flags = (ret & 0xff00); /* upper 8 bits = flags */
967 if (flags & IR_MAILBOX) {
968 if (strncasecmp(parms[2], "INBOX/", 6)) {
969 cprintf("%s NO Personal folders must be created under INBOX\r\n", parms[0]);
970 lprintf(CTDL_DEBUG, "not subordinate to inbox\n");
975 if (flags & IR_MAILBOX) {
976 newroomtype = 4; /* private mailbox */
977 newroomview = VIEW_MAILBOX;
979 newroomtype = 0; /* public folder */
980 newroomview = VIEW_BBS;
983 lprintf(CTDL_INFO, "Create new room <%s> on floor <%d> with type <%d>\n",
984 roomname, floornum, newroomtype);
986 ret = create_room(roomname, newroomtype, "", floornum, 1, 0, newroomview);
989 ("%s NO Mailbox already exists, or create failed\r\n",
992 cprintf("%s OK CREATE completed\r\n", parms[0]);
994 lprintf(CTDL_DEBUG, "imap_create() completed\n");
999 * Locate a room by its IMAP folder name, and check access to it.
1000 * If zapped_ok is nonzero, we can also look for the room in the zapped list.
1002 int imap_grabroom(char *returned_roomname, char *foldername, int zapped_ok)
1005 char augmented_roomname[ROOMNAMELEN];
1006 char roomname[ROOMNAMELEN];
1008 struct ctdlroom QRscratch;
1012 ret = imap_roomname(roomname, sizeof roomname, foldername);
1017 /* First try a regular match */
1018 c = getroom(&QRscratch, roomname);
1020 /* Then try a mailbox name match */
1022 MailboxName(augmented_roomname, sizeof augmented_roomname,
1023 &CC->user, roomname);
1024 c = getroom(&QRscratch, augmented_roomname);
1026 strcpy(roomname, augmented_roomname);
1029 /* If the room exists, check security/access */
1031 /* See if there is an existing user/room relationship */
1032 CtdlRoomAccess(&QRscratch, &CC->user, &ra, NULL);
1034 /* normal clients have to pass through security */
1035 if (ra & UA_KNOWN) {
1038 if ((zapped_ok) && (ra & UA_ZAPPED)) {
1043 /* Fail here if no such room */
1045 strcpy(returned_roomname, "");
1048 strcpy(returned_roomname, QRscratch.QRname);
1055 * Implements the STATUS command (sort of)
1058 void imap_status(int num_parms, char *parms[])
1061 char roomname[ROOMNAMELEN];
1063 char savedroom[ROOMNAMELEN];
1066 ret = imap_grabroom(roomname, parms[2], 0);
1069 ("%s NO Invalid mailbox name or location, or access denied\r\n",
1075 * usergoto() formally takes us to the desired room, happily returning
1076 * the number of messages and number of new messages. (If another
1077 * folder is selected, save its name so we can return there!!!!!)
1079 if (IMAP->selected) {
1080 strcpy(savedroom, CC->room.QRname);
1082 usergoto(roomname, 0, 0, &msgs, &new);
1085 * Tell the client what it wants to know. In fact, tell it *more* than
1086 * it wants to know. We happily IGnore the supplied status data item
1087 * names and simply spew all possible data items. It's far easier to
1088 * code and probably saves us some processing time too.
1090 imap_mailboxname(buf, sizeof buf, &CC->room);
1091 cprintf("* STATUS ");
1093 cprintf(" (MESSAGES %d ", msgs);
1094 cprintf("RECENT %d ", new); /* Initially, new==recent */
1095 cprintf("UIDNEXT %ld ", CitControl.MMhighest + 1);
1096 cprintf("UNSEEN %d)\r\n", new);
1099 * If another folder is selected, go back to that room so we can resume
1100 * our happy day without violent explosions.
1102 if (IMAP->selected) {
1103 usergoto(savedroom, 0, 0, &msgs, &new);
1107 * Oooh, look, we're done!
1109 cprintf("%s OK STATUS completed\r\n", parms[0]);
1115 * Implements the SUBSCRIBE command
1118 void imap_subscribe(int num_parms, char *parms[])
1121 char roomname[ROOMNAMELEN];
1122 char savedroom[ROOMNAMELEN];
1125 ret = imap_grabroom(roomname, parms[2], 1);
1128 "%s NO Error %d: invalid mailbox name or location, or access denied\r\n",
1136 * usergoto() formally takes us to the desired room, which has the side
1137 * effect of marking the room as not-zapped ... exactly the effect
1138 * we're looking for.
1140 if (IMAP->selected) {
1141 strcpy(savedroom, CC->room.QRname);
1143 usergoto(roomname, 0, 0, &msgs, &new);
1146 * If another folder is selected, go back to that room so we can resume
1147 * our happy day without violent explosions.
1149 if (IMAP->selected) {
1150 usergoto(savedroom, 0, 0, &msgs, &new);
1153 cprintf("%s OK SUBSCRIBE completed\r\n", parms[0]);
1158 * Implements the UNSUBSCRIBE command
1161 void imap_unsubscribe(int num_parms, char *parms[])
1164 char roomname[ROOMNAMELEN];
1165 char savedroom[ROOMNAMELEN];
1168 ret = imap_grabroom(roomname, parms[2], 0);
1171 ("%s NO Invalid mailbox name or location, or access denied\r\n",
1177 * usergoto() formally takes us to the desired room.
1179 if (IMAP->selected) {
1180 strcpy(savedroom, CC->room.QRname);
1182 usergoto(roomname, 0, 0, &msgs, &new);
1185 * Now make the API call to zap the room
1187 if (CtdlForgetThisRoom() == 0) {
1188 cprintf("%s OK UNSUBSCRIBE completed\r\n", parms[0]);
1191 ("%s NO You may not unsubscribe from this folder.\r\n",
1196 * If another folder is selected, go back to that room so we can resume
1197 * our happy day without violent explosions.
1199 if (IMAP->selected) {
1200 usergoto(savedroom, 0, 0, &msgs, &new);
1207 * Implements the DELETE command
1210 void imap_delete(int num_parms, char *parms[])
1213 char roomname[ROOMNAMELEN];
1214 char savedroom[ROOMNAMELEN];
1217 ret = imap_grabroom(roomname, parms[2], 0);
1219 cprintf("%s NO Invalid mailbox name, or access denied\r\n",
1225 * usergoto() formally takes us to the desired room, happily returning
1226 * the number of messages and number of new messages. (If another
1227 * folder is selected, save its name so we can return there!!!!!)
1229 if (IMAP->selected) {
1230 strcpy(savedroom, CC->room.QRname);
1232 usergoto(roomname, 0, 0, &msgs, &new);
1235 * Now delete the room.
1237 if (CtdlDoIHavePermissionToDeleteThisRoom(&CC->room)) {
1238 schedule_room_for_deletion(&CC->room);
1239 cprintf("%s OK DELETE completed\r\n", parms[0]);
1241 cprintf("%s NO Can't delete this folder.\r\n", parms[0]);
1245 * If another folder is selected, go back to that room so we can resume
1246 * our happy day without violent explosions.
1248 if (IMAP->selected) {
1249 usergoto(savedroom, 0, 0, &msgs, &new);
1255 * Back end function for imap_rename()
1257 void imap_rename_backend(struct ctdlroom *qrbuf, void *data)
1259 char foldername[SIZ];
1260 char newfoldername[SIZ];
1261 char newroomname[ROOMNAMELEN];
1263 struct irl *irlp = NULL; /* scratch pointer */
1264 struct irlparms *irlparms;
1266 irlparms = (struct irlparms *) data;
1267 imap_mailboxname(foldername, sizeof foldername, qrbuf);
1269 /* Rename subfolders */
1270 if ((!strncasecmp(foldername, irlparms->oldname,
1271 strlen(irlparms->oldname))
1272 && (foldername[strlen(irlparms->oldname)] == '/'))) {
1274 sprintf(newfoldername, "%s/%s",
1276 &foldername[strlen(irlparms->oldname) + 1]
1279 newfloor = imap_roomname(newroomname,
1281 newfoldername) & 0xFF;
1283 irlp = (struct irl *) malloc(sizeof(struct irl));
1284 strcpy(irlp->irl_newroom, newroomname);
1285 strcpy(irlp->irl_oldroom, qrbuf->QRname);
1286 irlp->irl_newfloor = newfloor;
1287 irlp->next = *(irlparms->irl);
1288 *(irlparms->irl) = irlp;
1294 * Implements the RENAME command
1297 void imap_rename(int num_parms, char *parms[])
1299 char old_room[ROOMNAMELEN];
1300 char new_room[ROOMNAMELEN];
1304 struct irl *irl = NULL; /* the list */
1305 struct irl *irlp = NULL; /* scratch pointer */
1306 struct irlparms irlparms;
1308 if (strchr(parms[3], '\\') != NULL) {
1309 cprintf("%s NO Invalid character in folder name\r\n",
1314 oldr = imap_roomname(old_room, sizeof old_room, parms[2]);
1315 newr = imap_roomname(new_room, sizeof new_room, parms[3]);
1316 new_floor = (newr & 0xFF);
1318 r = CtdlRenameRoom(old_room, new_room, new_floor);
1320 if (r == crr_room_not_found) {
1321 cprintf("%s NO Could not locate this folder\r\n",
1325 if (r == crr_already_exists) {
1326 cprintf("%s '%s' already exists.\r\n", parms[0], parms[2]);
1329 if (r == crr_noneditable) {
1330 cprintf("%s This folder is not editable.\r\n", parms[0]);
1333 if (r == crr_invalid_floor) {
1334 cprintf("%s Folder root does not exist.\r\n", parms[0]);
1337 if (r == crr_access_denied) {
1338 cprintf("%s You do not have permission to edit "
1339 "this folder.\r\n", parms[0]);
1343 cprintf("%s NO Rename failed - undefined error %d\r\n",
1349 /* If this is the INBOX, then RFC2060 says we have to just move the
1350 * contents. In a Citadel environment it's easier to rename the room
1351 * (already did that) and create a new inbox.
1353 if (!strcasecmp(parms[2], "INBOX")) {
1354 create_room(MAILROOM, 4, "", 0, 1, 0, VIEW_MAILBOX);
1357 /* Otherwise, do the subfolders. Build a list of rooms to rename... */
1359 irlparms.oldname = parms[2];
1360 irlparms.newname = parms[3];
1361 irlparms.irl = &irl;
1362 ForEachRoom(imap_rename_backend, (void *) &irlparms);
1364 /* ... and now rename them. */
1365 while (irl != NULL) {
1366 r = CtdlRenameRoom(irl->irl_oldroom,
1370 /* FIXME handle error returns better */
1371 lprintf(CTDL_ERR, "CtdlRenameRoom() error %d\n",
1380 cprintf("%s OK RENAME completed\r\n", parms[0]);
1387 * Main command loop for IMAP sessions.
1389 void imap_command_loop(void)
1395 CC->lastcmd = time(NULL);
1396 memset(cmdbuf, 0, sizeof cmdbuf); /* Clear it, just in case */
1398 if (client_getln(cmdbuf, sizeof cmdbuf) < 1) {
1399 lprintf(CTDL_ERR, "IMAP socket is broken. Ending session.\r\n");
1404 lprintf(CTDL_INFO, "IMAP: %s\n", cmdbuf);
1405 while (strlen(cmdbuf) < 5)
1406 strcat(cmdbuf, " ");
1408 /* strip off l/t whitespace and CRLF */
1409 if (cmdbuf[strlen(cmdbuf) - 1] == '\n')
1410 cmdbuf[strlen(cmdbuf) - 1] = 0;
1411 if (cmdbuf[strlen(cmdbuf) - 1] == '\r')
1412 cmdbuf[strlen(cmdbuf) - 1] = 0;
1415 /* If we're in the middle of a multi-line command, handle that */
1416 if (IMAP->authstate == imap_as_expecting_username) {
1417 imap_auth_login_user(cmdbuf);
1420 if (IMAP->authstate == imap_as_expecting_password) {
1421 imap_auth_login_pass(cmdbuf);
1425 /* Ok, at this point we're in normal command mode. The first thing
1426 * we do is print any incoming pages (yeah! we really do!)
1428 imap_print_instant_messages();
1431 * Before processing the command that was just entered... if we happen
1432 * to have a folder selected, we'd like to rescan that folder for new
1433 * messages, and for deletions/changes of existing messages. This
1434 * could probably be optimized somehow, but IMAP sucks...
1436 if (IMAP->selected) {
1437 imap_rescan_msgids();
1440 /* Now for the command set. */
1442 /* Grab the tag, command, and parameters. Check syntax. */
1443 num_parms = imap_parameterize(parms, cmdbuf);
1444 if (num_parms < 2) {
1445 cprintf("BAD syntax error\r\n");
1448 /* The commands below may be executed in any state */
1450 else if ((!strcasecmp(parms[1], "NOOP"))
1451 || (!strcasecmp(parms[1], "CHECK"))) {
1452 cprintf("%s OK This command successfully did nothing.\r\n",
1456 else if (!strcasecmp(parms[1], "LOGOUT")) {
1457 if (IMAP->selected) {
1458 imap_do_expunge(); /* yes, we auto-expunge */
1460 cprintf("* BYE %s logging out\r\n", config.c_fqdn);
1461 cprintf("%s OK thank you for using Citadel IMAP\r\n",
1467 else if (!strcasecmp(parms[1], "LOGIN")) {
1468 imap_login(num_parms, parms);
1471 else if (!strcasecmp(parms[1], "AUTHENTICATE")) {
1472 imap_authenticate(num_parms, parms);
1475 else if (!strcasecmp(parms[1], "CAPABILITY")) {
1476 imap_capability(num_parms, parms);
1479 else if (!strcasecmp(parms[1], "STARTTLS")) {
1480 imap_starttls(num_parms, parms);
1483 else if (!CC->logged_in) {
1484 cprintf("%s BAD Not logged in.\r\n", parms[0]);
1487 /* The commans below require a logged-in state */
1489 else if (!strcasecmp(parms[1], "SELECT")) {
1490 imap_select(num_parms, parms);
1493 else if (!strcasecmp(parms[1], "EXAMINE")) {
1494 imap_select(num_parms, parms);
1497 else if (!strcasecmp(parms[1], "LSUB")) {
1498 imap_lsub(num_parms, parms);
1501 else if (!strcasecmp(parms[1], "LIST")) {
1502 imap_list(num_parms, parms);
1505 else if (!strcasecmp(parms[1], "CREATE")) {
1506 imap_create(num_parms, parms);
1509 else if (!strcasecmp(parms[1], "DELETE")) {
1510 imap_delete(num_parms, parms);
1513 else if (!strcasecmp(parms[1], "RENAME")) {
1514 imap_rename(num_parms, parms);
1517 else if (!strcasecmp(parms[1], "STATUS")) {
1518 imap_status(num_parms, parms);
1521 else if (!strcasecmp(parms[1], "SUBSCRIBE")) {
1522 imap_subscribe(num_parms, parms);
1525 else if (!strcasecmp(parms[1], "UNSUBSCRIBE")) {
1526 imap_unsubscribe(num_parms, parms);
1529 else if (!strcasecmp(parms[1], "APPEND")) {
1530 imap_append(num_parms, parms);
1533 else if (!strcasecmp(parms[1], "NAMESPACE")) {
1534 imap_namespace(num_parms, parms);
1537 else if (IMAP->selected == 0) {
1538 cprintf("%s BAD no folder selected\r\n", parms[0]);
1541 /* The commands below require the SELECT state on a mailbox */
1543 else if (!strcasecmp(parms[1], "FETCH")) {
1544 imap_fetch(num_parms, parms);
1547 else if ((!strcasecmp(parms[1], "UID"))
1548 && (!strcasecmp(parms[2], "FETCH"))) {
1549 imap_uidfetch(num_parms, parms);
1552 else if (!strcasecmp(parms[1], "SEARCH")) {
1553 imap_search(num_parms, parms);
1556 else if ((!strcasecmp(parms[1], "UID"))
1557 && (!strcasecmp(parms[2], "SEARCH"))) {
1558 imap_uidsearch(num_parms, parms);
1561 else if (!strcasecmp(parms[1], "STORE")) {
1562 imap_store(num_parms, parms);
1565 else if ((!strcasecmp(parms[1], "UID"))
1566 && (!strcasecmp(parms[2], "STORE"))) {
1567 imap_uidstore(num_parms, parms);
1570 else if (!strcasecmp(parms[1], "COPY")) {
1571 imap_copy(num_parms, parms);
1574 else if ((!strcasecmp(parms[1], "UID"))
1575 && (!strcasecmp(parms[2], "COPY"))) {
1576 imap_uidcopy(num_parms, parms);
1579 else if (!strcasecmp(parms[1], "EXPUNGE")) {
1580 imap_expunge(num_parms, parms);
1583 else if (!strcasecmp(parms[1], "CLOSE")) {
1584 imap_close(num_parms, parms);
1587 /* End of commands. If we get here, the command is either invalid
1592 cprintf("%s BAD command unrecognized\r\n", parms[0]);
1595 /* If the client transmitted a message we can free it now */
1596 imap_free_transmitted_message();
1602 * This function is called to register the IMAP extension with Citadel.
1604 char *serv_imap_init(void)
1606 CtdlRegisterServiceHook(config.c_imap_port,
1607 NULL, imap_greeting, imap_command_loop, NULL);
1609 CtdlRegisterServiceHook(config.c_imaps_port,
1610 NULL, imaps_greeting, imap_command_loop, NULL);
1612 CtdlRegisterSessionHook(imap_cleanup_function, EVT_STOP);