-/*
- * $Id$
- *
- * IMAP server for the Citadel system
- * Copyright (C) 2000-2007 by Art Cancro and others.
- * This code is released under the terms of the GNU General Public License.
- *
- * WARNING: the IMAP protocol is badly designed. No implementation of it
- * is perfect. Indeed, with so much gratuitous complexity, *all* IMAP
- * implementations have bugs.
- */
-
-#include "sysdep.h"
-#include <stdlib.h>
-#include <unistd.h>
-#include <stdio.h>
-#include <fcntl.h>
-#include <signal.h>
-#include <pwd.h>
-#include <errno.h>
-#include <sys/types.h>
-
-#if TIME_WITH_SYS_TIME
-# include <sys/time.h>
-# include <time.h>
-#else
-# if HAVE_SYS_TIME_H
-# include <sys/time.h>
-# else
-# include <time.h>
-# endif
-#endif
-
-#include <sys/wait.h>
-#include <ctype.h>
-#include <string.h>
-#include <limits.h>
-#include "citadel.h"
-#include "server.h"
-#include "citserver.h"
-#include "support.h"
-#include "config.h"
-#include "room_ops.h"
-#include "user_ops.h"
-#include "policy.h"
-#include "database.h"
-#include "msgbase.h"
-#include "tools.h"
-#include "internet_addressing.h"
-#include "serv_imap.h"
-#include "imap_tools.h"
-#include "imap_list.h"
-#include "imap_fetch.h"
-#include "imap_search.h"
-#include "imap_store.h"
-#include "imap_acl.h"
-#include "imap_metadata.h"
-#include "imap_misc.h"
-
-#ifdef HAVE_OPENSSL
-#include "serv_crypto.h"
-#endif
-
-
-#include "ctdl_module.h"
-
-
-/* imap_rename() uses this struct containing list of rooms to rename */
-struct irl {
- struct irl *next;
- char irl_oldroom[ROOMNAMELEN];
- char irl_newroom[ROOMNAMELEN];
- int irl_newfloor;
-};
-
-/* Data which is passed between imap_rename() and imap_rename_backend() */
-struct irlparms {
- char *oldname;
- char *newname;
- struct irl **irl;
-};
-
-
-/*
- * If there is a message ID map in memory, free it
- */
-void imap_free_msgids(void)
-{
- if (IMAP->msgids != NULL) {
- free(IMAP->msgids);
- IMAP->msgids = NULL;
- IMAP->num_msgs = 0;
- IMAP->num_alloc = 0;
- }
- if (IMAP->flags != NULL) {
- free(IMAP->flags);
- IMAP->flags = NULL;
- }
- IMAP->last_mtime = (-1);
-}
-
-
-/*
- * If there is a transmitted message in memory, free it
- */
-void imap_free_transmitted_message(void)
-{
- if (IMAP->transmitted_message != NULL) {
- free(IMAP->transmitted_message);
- IMAP->transmitted_message = NULL;
- IMAP->transmitted_length = 0;
- }
-}
-
-
-/*
- * Set the \Seen, \Recent. and \Answered flags, based on the sequence
- * sets stored in the visit record for this user/room. Note that we have
- * to parse each sequence set manually here, because calling the utility
- * function is_msg_in_sequence_set() over and over again is too expensive.
- *
- * first_msg should be set to 0 to rescan the flags for every message in the
- * room, or some other value if we're only interested in an incremental
- * update.
- */
-void imap_set_seen_flags(int first_msg)
-{
- struct visit vbuf;
- int i;
- int num_sets;
- int s;
- char setstr[64], lostr[64], histr[64];
- long lo, hi;
-
- if (IMAP->num_msgs < 1) return;
- CtdlGetRelationship(&vbuf, &CC->user, &CC->room);
-
- for (i = first_msg; i < IMAP->num_msgs; ++i) {
- IMAP->flags[i] = IMAP->flags[i] & ~IMAP_SEEN;
- IMAP->flags[i] |= IMAP_RECENT;
- IMAP->flags[i] = IMAP->flags[i] & ~IMAP_ANSWERED;
- }
-
- /*
- * Do the "\Seen" flag.
- * (Any message not "\Seen" is considered "\Recent".)
- */
- num_sets = num_tokens(vbuf.v_seen, ',');
- for (s=0; s<num_sets; ++s) {
- extract_token(setstr, vbuf.v_seen, s, ',', sizeof setstr);
-
- extract_token(lostr, setstr, 0, ':', sizeof lostr);
- if (num_tokens(setstr, ':') >= 2) {
- extract_token(histr, setstr, 1, ':', sizeof histr);
- if (!strcmp(histr, "*")) {
- snprintf(histr, sizeof histr, "%ld", LONG_MAX);
- }
- }
- else {
- strcpy(histr, lostr);
- }
- lo = atol(lostr);
- hi = atol(histr);
-
- for (i = first_msg; i < IMAP->num_msgs; ++i) {
- if ((IMAP->msgids[i] >= lo) && (IMAP->msgids[i] <= hi)){
- IMAP->flags[i] |= IMAP_SEEN;
- IMAP->flags[i] = IMAP->flags[i] & ~IMAP_RECENT;
- }
- }
- }
-
- /* Do the ANSWERED flag */
- num_sets = num_tokens(vbuf.v_answered, ',');
- for (s=0; s<num_sets; ++s) {
- extract_token(setstr, vbuf.v_answered, s, ',', sizeof setstr);
-
- extract_token(lostr, setstr, 0, ':', sizeof lostr);
- if (num_tokens(setstr, ':') >= 2) {
- extract_token(histr, setstr, 1, ':', sizeof histr);
- if (!strcmp(histr, "*")) {
- snprintf(histr, sizeof histr, "%ld", LONG_MAX);
- }
- }
- else {
- strcpy(histr, lostr);
- }
- lo = atol(lostr);
- hi = atol(histr);
-
- for (i = first_msg; i < IMAP->num_msgs; ++i) {
- if ((IMAP->msgids[i] >= lo) && (IMAP->msgids[i] <= hi)){
- IMAP->flags[i] |= IMAP_ANSWERED;
- }
- }
- }
-
-}
-
-
-
-/*
- * Back end for imap_load_msgids()
- *
- * Optimization: instead of calling realloc() to add each message, we
- * allocate space in the list for REALLOC_INCREMENT messages at a time. This
- * allows the mapping to proceed much faster.
- */
-void imap_add_single_msgid(long msgnum, void *userdata)
-{
-
- ++IMAP->num_msgs;
- if (IMAP->num_msgs > IMAP->num_alloc) {
- IMAP->num_alloc += REALLOC_INCREMENT;
- IMAP->msgids = realloc(IMAP->msgids,
- (IMAP->num_alloc * sizeof(long)) );
- IMAP->flags = realloc(IMAP->flags,
- (IMAP->num_alloc * sizeof(long)) );
- }
- IMAP->msgids[IMAP->num_msgs - 1] = msgnum;
- IMAP->flags[IMAP->num_msgs - 1] = 0;
-}
-
-
-
-/*
- * Set up a message ID map for the current room (folder)
- */
-void imap_load_msgids(void)
-{
- struct cdbdata *cdbfr;
-
- if (IMAP->selected == 0) {
- lprintf(CTDL_ERR,
- "imap_load_msgids() can't run; no room selected\n");
- return;
- }
-
- imap_free_msgids(); /* If there was already a map, free it */
-
- /* Load the message list */
- cdbfr = cdb_fetch(CDB_MSGLISTS, &CC->room.QRnumber, sizeof(long));
- if (cdbfr != NULL) {
- IMAP->msgids = malloc(cdbfr->len);
- memcpy(IMAP->msgids, cdbfr->ptr, cdbfr->len);
- IMAP->num_msgs = cdbfr->len / sizeof(long);
- IMAP->num_alloc = cdbfr->len / sizeof(long);
- cdb_free(cdbfr);
- }
-
- if (IMAP->num_msgs) {
- IMAP->flags = malloc(IMAP->num_alloc * sizeof(long));
- memset(IMAP->flags, 0, (IMAP->num_alloc * sizeof(long)) );
- }
-
- imap_set_seen_flags(0);
-}
-
-
-/*
- * Re-scan the selected room (folder) and see if it's been changed at all
- */
-void imap_rescan_msgids(void)
-{
-
- int original_num_msgs = 0;
- long original_highest = 0L;
- int i, j, jstart;
- int message_still_exists;
- struct cdbdata *cdbfr;
- long *msglist = NULL;
- int num_msgs = 0;
- int num_recent = 0;
-
- if (IMAP->selected == 0) {
- lprintf(CTDL_ERR,
- "imap_load_msgids() can't run; no room selected\n");
- return;
- }
-
- /*
- * Check to see if the room's contents have changed.
- * If not, we can avoid this rescan.
- */
- getroom(&CC->room, CC->room.QRname);
- if (IMAP->last_mtime == CC->room.QRmtime) { /* No changes! */
- return;
- }
-
- /* Load the *current* message list from disk, so we can compare it
- * to what we have in memory.
- */
- cdbfr = cdb_fetch(CDB_MSGLISTS, &CC->room.QRnumber, sizeof(long));
- if (cdbfr != NULL) {
- msglist = malloc(cdbfr->len);
- if (msglist == NULL) {
- lprintf(CTDL_CRIT, "malloc() failed\n");
- abort();
- }
- memcpy(msglist, cdbfr->ptr, (size_t)cdbfr->len);
- num_msgs = cdbfr->len / sizeof(long);
- cdb_free(cdbfr);
- } else {
- num_msgs = 0;
- }
-
- /*
- * Check to see if any of the messages we know about have been expunged
- */
- if (IMAP->num_msgs > 0) {
- jstart = 0;
- for (i = 0; i < IMAP->num_msgs; ++i) {
-
- message_still_exists = 0;
- if (num_msgs > 0) {
- for (j = jstart; j < num_msgs; ++j) {
- if (msglist[j] == IMAP->msgids[i]) {
- message_still_exists = 1;
- jstart = j;
- break;
- }
- }
- }
-
- if (message_still_exists == 0) {
- cprintf("* %d EXPUNGE\r\n", i + 1);
-
- /* Here's some nice stupid nonsense. When a
- * message is expunged, we have to slide all
- * the existing messages up in the message
- * array.
- */
- --IMAP->num_msgs;
- memcpy(&IMAP->msgids[i],
- &IMAP->msgids[i + 1],
- (sizeof(long) *
- (IMAP->num_msgs - i)));
- memcpy(&IMAP->flags[i],
- &IMAP->flags[i + 1],
- (sizeof(long) *
- (IMAP->num_msgs - i)));
-
- --i;
- }
-
- }
- }
-
- /*
- * Remember how many messages were here before we re-scanned.
- */
- original_num_msgs = IMAP->num_msgs;
- if (IMAP->num_msgs > 0) {
- original_highest = IMAP->msgids[IMAP->num_msgs - 1];
- } else {
- original_highest = 0L;
- }
-
- /*
- * Now peruse the room for *new* messages only.
- */
- if (num_msgs > 0) {
- for (j = 0; j < num_msgs; ++j) {
- if (msglist[j] > original_highest) {
- imap_add_single_msgid(msglist[j], NULL);
- }
- }
- }
- imap_set_seen_flags(original_num_msgs);
-
- /*
- * If new messages have arrived, tell the client about them.
- */
- if (IMAP->num_msgs > original_num_msgs) {
-
- for (j = 0; j < num_msgs; ++j) {
- if (IMAP->flags[j] & IMAP_RECENT) {
- ++num_recent;
- }
- }
-
- cprintf("* %d EXISTS\r\n", IMAP->num_msgs);
- cprintf("* %d RECENT\r\n", num_recent);
- }
-
- if (num_msgs != 0) {
- free(msglist);
- }
- IMAP->last_mtime = CC->room.QRmtime;
-}
-
-
-
-
-
-
-
-/*
- * This cleanup function blows away the temporary memory and files used by
- * the IMAP server.
- */
-void imap_cleanup_function(void)
-{
-
- /* Don't do this stuff if this is not a IMAP session! */
- if (CC->h_command_function != imap_command_loop)
- return;
-
- /* If there is a mailbox selected, auto-expunge it. */
- if (IMAP->selected) {
- imap_do_expunge();
- }
-
- lprintf(CTDL_DEBUG, "Performing IMAP cleanup hook\n");
- imap_free_msgids();
- imap_free_transmitted_message();
-
- if (IMAP->cached_rfc822_data != NULL) {
- free(IMAP->cached_rfc822_data);
- IMAP->cached_rfc822_data = NULL;
- IMAP->cached_rfc822_msgnum = (-1);
- IMAP->cached_rfc822_withbody = 0;
- }
-
- if (IMAP->cached_body != NULL) {
- free(IMAP->cached_body);
- IMAP->cached_body = NULL;
- IMAP->cached_body_len = 0;
- IMAP->cached_bodymsgnum = (-1);
- }
-
- free(IMAP);
- lprintf(CTDL_DEBUG, "Finished IMAP cleanup hook\n");
-}
-
-
-/*
- * Does the actual work of the CAPABILITY command (because we need to
- * output this stuff in other places as well)
- */
-void imap_output_capability_string(void) {
- cprintf("CAPABILITY IMAP4REV1 NAMESPACE ID ACL AUTH=PLAIN AUTH=LOGIN");
-
-#ifdef HAVE_OPENSSL
- if (!CC->redirect_ssl) cprintf(" STARTTLS");
-#endif
-
- /* We are building a partial implementation of METADATA for the sole purpose
- * of interoperating with the ical/vcard version of the Bynari Insight Connector.
- * If you were expecting something else, comment out one or both of these
- * extension advertisements.
- */
- cprintf(" METADATA");
- /* cprintf(" LIST-EXTENDED"); */
-}
-
-/*
- * implements the CAPABILITY command
- */
-void imap_capability(int num_parms, char *parms[])
-{
- cprintf("* ");
- imap_output_capability_string();
- cprintf("\r\n");
- cprintf("%s OK CAPABILITY completed\r\n", parms[0]);
-}
-
-
-
-/*
- * Implements the ID command (specified by RFC2971)
- *
- * We ignore the client-supplied information, and output a NIL response.
- * Although this is technically a valid implementation of the extension, it
- * is quite useless. It exists only so that we may see which clients are
- * making use of this extension.
- *
- */
-void imap_id(int num_parms, char *parms[])
-{
- cprintf("* ID NIL\r\n");
- cprintf("%s OK ID completed\r\n", parms[0]);
-}
-
-
-
-/*
- * Here's where our IMAP session begins its happy day.
- */
-void imap_greeting(void)
-{
-
- strcpy(CC->cs_clientname, "IMAP session");
- IMAP = malloc(sizeof (struct citimap));
- memset(IMAP, 0, sizeof(struct citimap));
- IMAP->authstate = imap_as_normal;
- IMAP->cached_rfc822_data = NULL;
- IMAP->cached_rfc822_msgnum = (-1);
- IMAP->cached_rfc822_withbody = 0;
-
- cprintf("* OK [");
- imap_output_capability_string();
- cprintf("] %s IMAP4rev1 %s ready\r\n", config.c_fqdn, CITADEL);
-}
-
-/*
- * IMAPS is just like IMAP, except it goes crypto right away.
- */
-#ifdef HAVE_OPENSSL
-void imaps_greeting(void) {
- CtdlStartTLS(NULL, NULL, NULL);
- imap_greeting();
-}
-#endif
-
-
-/*
- * implements the LOGIN command (ordinary username/password login)
- */
-void imap_login(int num_parms, char *parms[])
-{
- if (num_parms != 4) {
- cprintf("%s BAD incorrect number of parameters\r\n", parms[0]);
- return;
- }
-
- if (CtdlLoginExistingUser(NULL, parms[2]) == login_ok) {
- if (CtdlTryPassword(parms[3]) == pass_ok) {
- cprintf("%s OK [", parms[0]);
- imap_output_capability_string();
- cprintf("] Hello, %s\r\n", CC->user.fullname);
- return;
- }
- }
-
- cprintf("%s BAD Login incorrect\r\n", parms[0]);
-}
-
-
-/*
- * Implements the AUTHENTICATE command
- */
-void imap_authenticate(int num_parms, char *parms[])
-{
- char buf[SIZ];
-
- if (num_parms != 3) {
- cprintf("%s BAD incorrect number of parameters\r\n",
- parms[0]);
- return;
- }
-
- if (CC->logged_in) {
- cprintf("%s BAD Already logged in.\r\n", parms[0]);
- return;
- }
-
- if (!strcasecmp(parms[2], "LOGIN")) {
- CtdlEncodeBase64(buf, "Username:", 9);
- cprintf("+ %s\r\n", buf);
- IMAP->authstate = imap_as_expecting_username;
- strcpy(IMAP->authseq, parms[0]);
- return;
- }
-
- if (!strcasecmp(parms[2], "PLAIN")) {
- // CtdlEncodeBase64(buf, "Username:", 9);
- // cprintf("+ %s\r\n", buf);
- cprintf("+ \r\n");
- IMAP->authstate = imap_as_expecting_plainauth;
- strcpy(IMAP->authseq, parms[0]);
- return;
- }
-
- else {
- cprintf("%s NO AUTHENTICATE %s failed\r\n",
- parms[0], parms[1]);
- }
-}
-
-void imap_auth_plain(char *cmd)
-{
- char decoded_authstring[1024];
- char ident[256];
- char user[256];
- char pass[256];
- int result;
-
- CtdlDecodeBase64(decoded_authstring, cmd, strlen(cmd));
- safestrncpy(ident, decoded_authstring, sizeof ident);
- safestrncpy(user, &decoded_authstring[strlen(ident) + 1], sizeof user);
- safestrncpy(pass, &decoded_authstring[strlen(ident) + strlen(user) + 2], sizeof pass);
-
- IMAP->authstate = imap_as_normal;
-
- if (strlen(ident) > 0) {
- result = CtdlLoginExistingUser(user, ident);
- }
- else {
- result = CtdlLoginExistingUser(NULL, user);
- }
-
- if (result == login_ok) {
- if (CtdlTryPassword(pass) == pass_ok) {
- cprintf("%s OK authentication succeeded\r\n", IMAP->authseq);
- return;
- }
- }
- cprintf("%s NO authentication failed\r\n", IMAP->authseq);
-}
-
-void imap_auth_login_user(char *cmd)
-{
- char buf[SIZ];
-
- CtdlDecodeBase64(buf, cmd, SIZ);
- CtdlLoginExistingUser(NULL, buf);
- CtdlEncodeBase64(buf, "Password:", 9);
- cprintf("+ %s\r\n", buf);
- IMAP->authstate = imap_as_expecting_password;
- return;
-}
-
-void imap_auth_login_pass(char *cmd)
-{
- char buf[SIZ];
-
- CtdlDecodeBase64(buf, cmd, SIZ);
- if (CtdlTryPassword(buf) == pass_ok) {
- cprintf("%s OK authentication succeeded\r\n", IMAP->authseq);
- } else {
- cprintf("%s NO authentication failed\r\n", IMAP->authseq);
- }
- IMAP->authstate = imap_as_normal;
- return;
-}
-
-
-/*
- * implements the STARTTLS command (Citadel API version)
- */
-#ifdef HAVE_OPENSSL
-void imap_starttls(int num_parms, char *parms[])
-{
- char ok_response[SIZ];
- char nosup_response[SIZ];
- char error_response[SIZ];
-
- sprintf(ok_response,
- "%s OK begin TLS negotiation now\r\n",
- parms[0]);
- sprintf(nosup_response,
- "%s NO TLS not supported here\r\n",
- parms[0]);
- sprintf(error_response,
- "%s BAD Internal error\r\n",
- parms[0]);
- CtdlStartTLS(ok_response, nosup_response, error_response);
-}
-#endif
-
-
-/*
- * implements the SELECT command
- */
-void imap_select(int num_parms, char *parms[])
-{
- char towhere[SIZ];
- char augmented_roomname[ROOMNAMELEN];
- int c = 0;
- int ok = 0;
- int ra = 0;
- struct ctdlroom QRscratch;
- int msgs, new;
- int floornum;
- int roomflags;
- int i;
-
- /* Convert the supplied folder name to a roomname */
- i = imap_roomname(towhere, sizeof towhere, parms[2]);
- if (i < 0) {
- cprintf("%s NO Invalid mailbox name.\r\n", parms[0]);
- IMAP->selected = 0;
- return;
- }
- floornum = (i & 0x00ff);
- roomflags = (i & 0xff00);
-
- /* First try a regular match */
- c = getroom(&QRscratch, towhere);
-
- /* Then try a mailbox name match */
- if (c != 0) {
- MailboxName(augmented_roomname, sizeof augmented_roomname,
- &CC->user, towhere);
- c = getroom(&QRscratch, augmented_roomname);
- if (c == 0)
- strcpy(towhere, augmented_roomname);
- }
-
- /* If the room exists, check security/access */
- if (c == 0) {
- /* See if there is an existing user/room relationship */
- CtdlRoomAccess(&QRscratch, &CC->user, &ra, NULL);
-
- /* normal clients have to pass through security */
- if (ra & UA_KNOWN) {
- ok = 1;
- }
- }
-
- /* Fail here if no such room */
- if (!ok) {
- cprintf("%s NO ... no such room, or access denied\r\n",
- parms[0]);
- return;
- }
-
- /* If we already had some other folder selected, auto-expunge it */
- imap_do_expunge();
-
- /*
- * usergoto() formally takes us to the desired room, happily returning
- * the number of messages and number of new messages.
- */
- memcpy(&CC->room, &QRscratch, sizeof(struct ctdlroom));
- usergoto(NULL, 0, 0, &msgs, &new);
- IMAP->selected = 1;
-
- if (!strcasecmp(parms[1], "EXAMINE")) {
- IMAP->readonly = 1;
- } else {
- IMAP->readonly = 0;
- }
-
- imap_load_msgids();
- IMAP->last_mtime = CC->room.QRmtime;
-
- cprintf("* %d EXISTS\r\n", msgs);
- cprintf("* %d RECENT\r\n", new);
-
- cprintf("* OK [UIDVALIDITY 1] UID validity status\r\n");
- cprintf("* OK [UIDNEXT %ld] Predicted next UID\r\n", CitControl.MMhighest + 1);
-
- /* Note that \Deleted is a valid flag, but not a permanent flag,
- * because we don't maintain its state across sessions. Citadel
- * automatically expunges mailboxes when they are de-selected.
- */
- cprintf("* FLAGS (\\Deleted \\Seen \\Answered)\r\n");
- cprintf("* OK [PERMANENTFLAGS (\\Deleted \\Seen \\Answered)] "
- "permanent flags\r\n");
-
- cprintf("%s OK [%s] %s completed\r\n",
- parms[0],
- (IMAP->readonly ? "READ-ONLY" : "READ-WRITE"), parms[1]);
-}
-
-
-
-/*
- * Does the real work for expunge.
- */
-int imap_do_expunge(void)
-{
- int i;
- int num_expunged = 0;
- long *delmsgs = NULL;
- int num_delmsgs = 0;
-
- lprintf(CTDL_DEBUG, "imap_do_expunge() called\n");
- if (IMAP->selected == 0) {
- return (0);
- }
-
- if (IMAP->num_msgs > 0) {
- delmsgs = malloc(IMAP->num_msgs * sizeof(long));
- for (i = 0; i < IMAP->num_msgs; ++i) {
- if (IMAP->flags[i] & IMAP_DELETED) {
- delmsgs[num_delmsgs++] = IMAP->msgids[i];
- }
- }
- if (num_delmsgs > 0) {
- CtdlDeleteMessages(CC->room.QRname, delmsgs, num_delmsgs, "");
- }
- num_expunged += num_delmsgs;
- free(delmsgs);
- }
-
- if (num_expunged > 0) {
- imap_rescan_msgids();
- }
-
- lprintf(CTDL_DEBUG, "Expunged %d messages from <%s>\n",
- num_expunged, CC->room.QRname);
- return (num_expunged);
-}
-
-
-/*
- * implements the EXPUNGE command syntax
- */
-void imap_expunge(int num_parms, char *parms[])
-{
- int num_expunged = 0;
-
- num_expunged = imap_do_expunge();
- cprintf("%s OK expunged %d messages.\r\n", parms[0], num_expunged);
-}
-
-
-/*
- * implements the CLOSE command
- */
-void imap_close(int num_parms, char *parms[])
-{
-
- /* Yes, we always expunge on close. */
- if (IMAP->selected) {
- imap_do_expunge();
- }
-
- IMAP->selected = 0;
- IMAP->readonly = 0;
- imap_free_msgids();
- cprintf("%s OK CLOSE completed\r\n", parms[0]);
-}
-
-
-/*
- * Implements the NAMESPACE command.
- */
-void imap_namespace(int num_parms, char *parms[])
-{
- int i;
- struct floor *fl;
- int floors = 0;
- char buf[SIZ];
-
- cprintf("* NAMESPACE ");
-
- /* All personal folders are subordinate to INBOX. */
- cprintf("((\"INBOX/\" \"/\")) ");
-
- /* Other users' folders ... coming soon! FIXME */
- cprintf("NIL ");
-
- /* Show all floors as shared namespaces. Neato! */
- cprintf("(");
- for (i = 0; i < MAXFLOORS; ++i) {
- fl = cgetfloor(i);
- if (fl->f_flags & F_INUSE) {
- if (floors > 0) cprintf(" ");
- cprintf("(");
- sprintf(buf, "%s/", fl->f_name);
- imap_strout(buf);
- cprintf(" \"/\")");
- ++floors;
- }
- }
- cprintf(")");
-
- /* Wind it up with a newline and a completion message. */
- cprintf("\r\n");
- cprintf("%s OK NAMESPACE completed\r\n", parms[0]);
-}
-
-
-
-/*
- * Implements the CREATE command
- *
- */
-void imap_create(int num_parms, char *parms[])
-{
- int ret;
- char roomname[ROOMNAMELEN];
- int floornum;
- int flags;
- int newroomtype = 0;
- int newroomview = 0;
-
- if (strchr(parms[2], '\\') != NULL) {
- cprintf("%s NO Invalid character in folder name\r\n",
- parms[0]);
- lprintf(CTDL_DEBUG, "invalid character in folder name\n");
- return;
- }
-
- ret = imap_roomname(roomname, sizeof roomname, parms[2]);
- if (ret < 0) {
- cprintf("%s NO Invalid mailbox name or location\r\n",
- parms[0]);
- lprintf(CTDL_DEBUG, "invalid mailbox name or location\n");
- return;
- }
- floornum = (ret & 0x00ff); /* lower 8 bits = floor number */
- flags = (ret & 0xff00); /* upper 8 bits = flags */
-
- if (flags & IR_MAILBOX) {
- if (strncasecmp(parms[2], "INBOX/", 6)) {
- cprintf("%s NO Personal folders must be created under INBOX\r\n", parms[0]);
- lprintf(CTDL_DEBUG, "not subordinate to inbox\n");
- return;
- }
- }
-
- if (flags & IR_MAILBOX) {
- newroomtype = 4; /* private mailbox */
- newroomview = VIEW_MAILBOX;
- } else {
- newroomtype = 0; /* public folder */
- newroomview = VIEW_BBS;
- }
-
- lprintf(CTDL_INFO, "Create new room <%s> on floor <%d> with type <%d>\n",
- roomname, floornum, newroomtype);
-
- ret = create_room(roomname, newroomtype, "", floornum, 1, 0, newroomview);
- if (ret == 0) {
- /*** DO NOT CHANGE THIS ERROR MESSAGE IN ANY WAY! BYNARI CONNECTOR DEPENDS ON IT! ***/
- cprintf("%s NO Mailbox already exists, or create failed\r\n", parms[0]);
- } else {
- cprintf("%s OK CREATE completed\r\n", parms[0]);
- }
- lprintf(CTDL_DEBUG, "imap_create() completed\n");
-}
-
-
-/*
- * Locate a room by its IMAP folder name, and check access to it.
- * If zapped_ok is nonzero, we can also look for the room in the zapped list.
- */
-int imap_grabroom(char *returned_roomname, char *foldername, int zapped_ok)
-{
- int ret;
- char augmented_roomname[ROOMNAMELEN];
- char roomname[ROOMNAMELEN];
- int c;
- struct ctdlroom QRscratch;
- int ra;
- int ok = 0;
-
- ret = imap_roomname(roomname, sizeof roomname, foldername);
- if (ret < 0) {
- return (1);
- }
-
- /* First try a regular match */
- c = getroom(&QRscratch, roomname);
-
- /* Then try a mailbox name match */
- if (c != 0) {
- MailboxName(augmented_roomname, sizeof augmented_roomname,
- &CC->user, roomname);
- c = getroom(&QRscratch, augmented_roomname);
- if (c == 0)
- strcpy(roomname, augmented_roomname);
- }
-
- /* If the room exists, check security/access */
- if (c == 0) {
- /* See if there is an existing user/room relationship */
- CtdlRoomAccess(&QRscratch, &CC->user, &ra, NULL);
-
- /* normal clients have to pass through security */
- if (ra & UA_KNOWN) {
- ok = 1;
- }
- if ((zapped_ok) && (ra & UA_ZAPPED)) {
- ok = 1;
- }
- }
-
- /* Fail here if no such room */
- if (!ok) {
- strcpy(returned_roomname, "");
- return (2);
- } else {
- strcpy(returned_roomname, QRscratch.QRname);
- return (0);
- }
-}
-
-
-/*
- * Implements the STATUS command (sort of)
- *
- */
-void imap_status(int num_parms, char *parms[])
-{
- int ret;
- char roomname[ROOMNAMELEN];
- char buf[SIZ];
- char savedroom[ROOMNAMELEN];
- int msgs, new;
-
- ret = imap_grabroom(roomname, parms[2], 0);
- if (ret != 0) {
- cprintf
- ("%s NO Invalid mailbox name or location, or access denied\r\n",
- parms[0]);
- return;
- }
-
- /*
- * usergoto() formally takes us to the desired room, happily returning
- * the number of messages and number of new messages. (If another
- * folder is selected, save its name so we can return there!!!!!)
- */
- if (IMAP->selected) {
- strcpy(savedroom, CC->room.QRname);
- }
- usergoto(roomname, 0, 0, &msgs, &new);
-
- /*
- * Tell the client what it wants to know. In fact, tell it *more* than
- * it wants to know. We happily IGnore the supplied status data item
- * names and simply spew all possible data items. It's far easier to
- * code and probably saves us some processing time too.
- */
- imap_mailboxname(buf, sizeof buf, &CC->room);
- cprintf("* STATUS ");
- imap_strout(buf);
- cprintf(" (MESSAGES %d ", msgs);
- cprintf("RECENT %d ", new); /* Initially, new==recent */
- cprintf("UIDNEXT %ld ", CitControl.MMhighest + 1);
- cprintf("UNSEEN %d)\r\n", new);
-
- /*
- * If another folder is selected, go back to that room so we can resume
- * our happy day without violent explosions.
- */
- if (IMAP->selected) {
- usergoto(savedroom, 0, 0, &msgs, &new);
- }
-
- /*
- * Oooh, look, we're done!
- */
- cprintf("%s OK STATUS completed\r\n", parms[0]);
-}
-
-
-
-/*
- * Implements the SUBSCRIBE command
- *
- */
-void imap_subscribe(int num_parms, char *parms[])
-{
- int ret;
- char roomname[ROOMNAMELEN];
- char savedroom[ROOMNAMELEN];
- int msgs, new;
-
- ret = imap_grabroom(roomname, parms[2], 1);
- if (ret != 0) {
- cprintf(
- "%s NO Error %d: invalid mailbox name or location, or access denied\r\n",
- parms[0],
- ret
- );
- return;
- }
-
- /*
- * usergoto() formally takes us to the desired room, which has the side
- * effect of marking the room as not-zapped ... exactly the effect
- * we're looking for.
- */
- if (IMAP->selected) {
- strcpy(savedroom, CC->room.QRname);
- }
- usergoto(roomname, 0, 0, &msgs, &new);
-
- /*
- * If another folder is selected, go back to that room so we can resume
- * our happy day without violent explosions.
- */
- if (IMAP->selected) {
- usergoto(savedroom, 0, 0, &msgs, &new);
- }
-
- cprintf("%s OK SUBSCRIBE completed\r\n", parms[0]);
-}
-
-
-/*
- * Implements the UNSUBSCRIBE command
- *
- */
-void imap_unsubscribe(int num_parms, char *parms[])
-{
- int ret;
- char roomname[ROOMNAMELEN];
- char savedroom[ROOMNAMELEN];
- int msgs, new;
-
- ret = imap_grabroom(roomname, parms[2], 0);
- if (ret != 0) {
- cprintf
- ("%s NO Invalid mailbox name or location, or access denied\r\n",
- parms[0]);
- return;
- }
-
- /*
- * usergoto() formally takes us to the desired room.
- */
- if (IMAP->selected) {
- strcpy(savedroom, CC->room.QRname);
- }
- usergoto(roomname, 0, 0, &msgs, &new);
-
- /*
- * Now make the API call to zap the room
- */
- if (CtdlForgetThisRoom() == 0) {
- cprintf("%s OK UNSUBSCRIBE completed\r\n", parms[0]);
- } else {
- cprintf
- ("%s NO You may not unsubscribe from this folder.\r\n",
- parms[0]);
- }
-
- /*
- * If another folder is selected, go back to that room so we can resume
- * our happy day without violent explosions.
- */
- if (IMAP->selected) {
- usergoto(savedroom, 0, 0, &msgs, &new);
- }
-}
-
-
-
-/*
- * Implements the DELETE command
- *
- */
-void imap_delete(int num_parms, char *parms[])
-{
- int ret;
- char roomname[ROOMNAMELEN];
- char savedroom[ROOMNAMELEN];
- int msgs, new;
-
- ret = imap_grabroom(roomname, parms[2], 1);
- if (ret != 0) {
- cprintf("%s NO Invalid mailbox name, or access denied\r\n",
- parms[0]);
- return;
- }
-
- /*
- * usergoto() formally takes us to the desired room, happily returning
- * the number of messages and number of new messages. (If another
- * folder is selected, save its name so we can return there!!!!!)
- */
- if (IMAP->selected) {
- strcpy(savedroom, CC->room.QRname);
- }
- usergoto(roomname, 0, 0, &msgs, &new);
-
- /*
- * Now delete the room.
- */
- if (CtdlDoIHavePermissionToDeleteThisRoom(&CC->room)) {
- schedule_room_for_deletion(&CC->room);
- cprintf("%s OK DELETE completed\r\n", parms[0]);
- } else {
- cprintf("%s NO Can't delete this folder.\r\n", parms[0]);
- }
-
- /*
- * If another folder is selected, go back to that room so we can resume
- * our happy day without violent explosions.
- */
- if (IMAP->selected) {
- usergoto(savedroom, 0, 0, &msgs, &new);
- }
-}
-
-
-/*
- * Back end function for imap_rename()
- */
-void imap_rename_backend(struct ctdlroom *qrbuf, void *data)
-{
- char foldername[SIZ];
- char newfoldername[SIZ];
- char newroomname[ROOMNAMELEN];
- int newfloor = 0;
- struct irl *irlp = NULL; /* scratch pointer */
- struct irlparms *irlparms;
-
- irlparms = (struct irlparms *) data;
- imap_mailboxname(foldername, sizeof foldername, qrbuf);
-
- /* Rename subfolders */
- if ((!strncasecmp(foldername, irlparms->oldname,
- strlen(irlparms->oldname))
- && (foldername[strlen(irlparms->oldname)] == '/'))) {
-
- sprintf(newfoldername, "%s/%s",
- irlparms->newname,
- &foldername[strlen(irlparms->oldname) + 1]
- );
-
- newfloor = imap_roomname(newroomname,
- sizeof newroomname,
- newfoldername) & 0xFF;
-
- irlp = (struct irl *) malloc(sizeof(struct irl));
- strcpy(irlp->irl_newroom, newroomname);
- strcpy(irlp->irl_oldroom, qrbuf->QRname);
- irlp->irl_newfloor = newfloor;
- irlp->next = *(irlparms->irl);
- *(irlparms->irl) = irlp;
- }
-}
-
-
-/*
- * Implements the RENAME command
- *
- */
-void imap_rename(int num_parms, char *parms[])
-{
- char old_room[ROOMNAMELEN];
- char new_room[ROOMNAMELEN];
- int oldr, newr;
- int new_floor;
- int r;
- struct irl *irl = NULL; /* the list */
- struct irl *irlp = NULL; /* scratch pointer */
- struct irlparms irlparms;
-
- if (strchr(parms[3], '\\') != NULL) {
- cprintf("%s NO Invalid character in folder name\r\n",
- parms[0]);
- return;
- }
-
- oldr = imap_roomname(old_room, sizeof old_room, parms[2]);
- newr = imap_roomname(new_room, sizeof new_room, parms[3]);
- new_floor = (newr & 0xFF);
-
- r = CtdlRenameRoom(old_room, new_room, new_floor);
-
- if (r == crr_room_not_found) {
- cprintf("%s NO Could not locate this folder\r\n",
- parms[0]);
- return;
- }
- if (r == crr_already_exists) {
- cprintf("%s '%s' already exists.\r\n", parms[0], parms[2]);
- return;
- }
- if (r == crr_noneditable) {
- cprintf("%s This folder is not editable.\r\n", parms[0]);
- return;
- }
- if (r == crr_invalid_floor) {
- cprintf("%s Folder root does not exist.\r\n", parms[0]);
- return;
- }
- if (r == crr_access_denied) {
- cprintf("%s You do not have permission to edit "
- "this folder.\r\n", parms[0]);
- return;
- }
- if (r != crr_ok) {
- cprintf("%s NO Rename failed - undefined error %d\r\n",
- parms[0], r);
- return;
- }
-
-
- /* If this is the INBOX, then RFC2060 says we have to just move the
- * contents. In a Citadel environment it's easier to rename the room
- * (already did that) and create a new inbox.
- */
- if (!strcasecmp(parms[2], "INBOX")) {
- create_room(MAILROOM, 4, "", 0, 1, 0, VIEW_MAILBOX);
- }
-
- /* Otherwise, do the subfolders. Build a list of rooms to rename... */
- else {
- irlparms.oldname = parms[2];
- irlparms.newname = parms[3];
- irlparms.irl = &irl;
- ForEachRoom(imap_rename_backend, (void *) &irlparms);
-
- /* ... and now rename them. */
- while (irl != NULL) {
- r = CtdlRenameRoom(irl->irl_oldroom,
- irl->irl_newroom,
- irl->irl_newfloor);
- if (r != crr_ok) {
- /* FIXME handle error returns better */
- lprintf(CTDL_ERR, "CtdlRenameRoom() error %d\n", r);
- }
- irlp = irl;
- irl = irl->next;
- free(irlp);
- }
- }
-
- cprintf("%s OK RENAME completed\r\n", parms[0]);
-}
-
-
-
-
-/*
- * Main command loop for IMAP sessions.
- */
-void imap_command_loop(void)
-{
- char cmdbuf[SIZ];
- char *parms[SIZ];
- int num_parms;
- struct timeval tv1, tv2;
- suseconds_t total_time = 0;
-
- gettimeofday(&tv1, NULL);
- CC->lastcmd = time(NULL);
- memset(cmdbuf, 0, sizeof cmdbuf); /* Clear it, just in case */
- flush_output();
- if (client_getln(cmdbuf, sizeof cmdbuf) < 1) {
- lprintf(CTDL_ERR, "Client disconnected: ending session.\r\n");
- CC->kill_me = 1;
- return;
- }
-
- if (IMAP->authstate == imap_as_expecting_password) {
- lprintf(CTDL_INFO, "IMAP: <password>\n");
- }
- else if (IMAP->authstate == imap_as_expecting_plainauth) {
- lprintf(CTDL_INFO, "IMAP: <plain_auth>\n");
- }
- else if (bmstrcasestr(cmdbuf, " LOGIN ")) {
- lprintf(CTDL_INFO, "IMAP: LOGIN...\n");
- }
- else {
- lprintf(CTDL_INFO, "IMAP: %s\n", cmdbuf);
- }
-
- while (strlen(cmdbuf) < 5)
- strcat(cmdbuf, " ");
-
- /* strip off l/t whitespace and CRLF */
- if (cmdbuf[strlen(cmdbuf) - 1] == '\n')
- cmdbuf[strlen(cmdbuf) - 1] = 0;
- if (cmdbuf[strlen(cmdbuf) - 1] == '\r')
- cmdbuf[strlen(cmdbuf) - 1] = 0;
- striplt(cmdbuf);
-
- /* If we're in the middle of a multi-line command, handle that */
- if (IMAP->authstate == imap_as_expecting_username) {
- imap_auth_login_user(cmdbuf);
- return;
- }
- if (IMAP->authstate == imap_as_expecting_plainauth) {
- imap_auth_plain(cmdbuf);
- return;
- }
- if (IMAP->authstate == imap_as_expecting_password) {
- imap_auth_login_pass(cmdbuf);
- return;
- }
-
- /* Ok, at this point we're in normal command mode. The first thing
- * we do is print any incoming pages (yeah! we really do!)
- */
- imap_print_instant_messages();
-
- /*
- * Before processing the command that was just entered... if we happen
- * to have a folder selected, we'd like to rescan that folder for new
- * messages, and for deletions/changes of existing messages. This
- * could probably be optimized somehow, but IMAP sucks...
- */
- if (IMAP->selected) {
- imap_rescan_msgids();
- }
-
- /* Now for the command set. */
-
- /* Grab the tag, command, and parameters. Check syntax. */
- num_parms = imap_parameterize(parms, cmdbuf);
- if (num_parms < 2) {
- cprintf("BAD syntax error\r\n");
- }
-
- /* The commands below may be executed in any state */
-
- else if ((!strcasecmp(parms[1], "NOOP"))
- || (!strcasecmp(parms[1], "CHECK"))) {
- cprintf("%s OK No operation\r\n",
- parms[0]);
- }
-
- else if (!strcasecmp(parms[1], "ID")) {
- imap_id(num_parms, parms);
- }
-
-
- else if (!strcasecmp(parms[1], "LOGOUT")) {
- if (IMAP->selected) {
- imap_do_expunge(); /* yes, we auto-expunge */
- }
- cprintf("* BYE %s logging out\r\n", config.c_fqdn);
- cprintf("%s OK Citadel IMAP session ended.\r\n",
- parms[0]);
- CC->kill_me = 1;
- return;
- }
-
- else if (!strcasecmp(parms[1], "LOGIN")) {
- imap_login(num_parms, parms);
- }
-
- else if (!strcasecmp(parms[1], "AUTHENTICATE")) {
- imap_authenticate(num_parms, parms);
- }
-
- else if (!strcasecmp(parms[1], "CAPABILITY")) {
- imap_capability(num_parms, parms);
- }
-#ifdef HAVE_OPENSSL
- else if (!strcasecmp(parms[1], "STARTTLS")) {
- imap_starttls(num_parms, parms);
- }
-#endif
- else if (!CC->logged_in) {
- cprintf("%s BAD Not logged in.\r\n", parms[0]);
- }
-
- /* The commans below require a logged-in state */
-
- else if (!strcasecmp(parms[1], "SELECT")) {
- imap_select(num_parms, parms);
- }
-
- else if (!strcasecmp(parms[1], "EXAMINE")) {
- imap_select(num_parms, parms);
- }
-
- else if (!strcasecmp(parms[1], "LSUB")) {
- imap_list(num_parms, parms);
- }
-
- else if (!strcasecmp(parms[1], "LIST")) {
- imap_list(num_parms, parms);
- }
-
- else if (!strcasecmp(parms[1], "CREATE")) {
- imap_create(num_parms, parms);
- }
-
- else if (!strcasecmp(parms[1], "DELETE")) {
- imap_delete(num_parms, parms);
- }
-
- else if (!strcasecmp(parms[1], "RENAME")) {
- imap_rename(num_parms, parms);
- }
-
- else if (!strcasecmp(parms[1], "STATUS")) {
- imap_status(num_parms, parms);
- }
-
- else if (!strcasecmp(parms[1], "SUBSCRIBE")) {
- imap_subscribe(num_parms, parms);
- }
-
- else if (!strcasecmp(parms[1], "UNSUBSCRIBE")) {
- imap_unsubscribe(num_parms, parms);
- }
-
- else if (!strcasecmp(parms[1], "APPEND")) {
- imap_append(num_parms, parms);
- }
-
- else if (!strcasecmp(parms[1], "NAMESPACE")) {
- imap_namespace(num_parms, parms);
- }
-
- else if (!strcasecmp(parms[1], "SETACL")) {
- imap_setacl(num_parms, parms);
- }
-
- else if (!strcasecmp(parms[1], "DELETEACL")) {
- imap_deleteacl(num_parms, parms);
- }
-
- else if (!strcasecmp(parms[1], "GETACL")) {
- imap_getacl(num_parms, parms);
- }
-
- else if (!strcasecmp(parms[1], "LISTRIGHTS")) {
- imap_listrights(num_parms, parms);
- }
-
- else if (!strcasecmp(parms[1], "MYRIGHTS")) {
- imap_myrights(num_parms, parms);
- }
-
- else if (!strcasecmp(parms[1], "GETMETADATA")) {
- imap_getmetadata(num_parms, parms);
- }
-
- else if (!strcasecmp(parms[1], "SETMETADATA")) {
- imap_setmetadata(num_parms, parms);
- }
-
- else if (IMAP->selected == 0) {
- cprintf("%s BAD no folder selected\r\n", parms[0]);
- }
-
- /* The commands below require the SELECT state on a mailbox */
-
- else if (!strcasecmp(parms[1], "FETCH")) {
- imap_fetch(num_parms, parms);
- }
-
- else if ((!strcasecmp(parms[1], "UID"))
- && (!strcasecmp(parms[2], "FETCH"))) {
- imap_uidfetch(num_parms, parms);
- }
-
- else if (!strcasecmp(parms[1], "SEARCH")) {
- imap_search(num_parms, parms);
- }
-
- else if ((!strcasecmp(parms[1], "UID"))
- && (!strcasecmp(parms[2], "SEARCH"))) {
- imap_uidsearch(num_parms, parms);
- }
-
- else if (!strcasecmp(parms[1], "STORE")) {
- imap_store(num_parms, parms);
- }
-
- else if ((!strcasecmp(parms[1], "UID"))
- && (!strcasecmp(parms[2], "STORE"))) {
- imap_uidstore(num_parms, parms);
- }
-
- else if (!strcasecmp(parms[1], "COPY")) {
- imap_copy(num_parms, parms);
- }
-
- else if ((!strcasecmp(parms[1], "UID"))
- && (!strcasecmp(parms[2], "COPY"))) {
- imap_uidcopy(num_parms, parms);
- }
-
- else if (!strcasecmp(parms[1], "EXPUNGE")) {
- imap_expunge(num_parms, parms);
- }
-
- else if (!strcasecmp(parms[1], "CLOSE")) {
- imap_close(num_parms, parms);
- }
-
- /* End of commands. If we get here, the command is either invalid
- * or unimplemented.
- */
-
- else {
- cprintf("%s BAD command unrecognized\r\n", parms[0]);
- }
-
- /* If the client transmitted a message we can free it now */
- imap_free_transmitted_message();
-
- gettimeofday(&tv2, NULL);
- total_time = (tv2.tv_usec + (tv2.tv_sec * 1000000)) - (tv1.tv_usec + (tv1.tv_sec * 1000000));
- lprintf(CTDL_DEBUG, "IMAP command completed in %ld.%ld seconds\n",
- (total_time / 1000000),
- (total_time % 1000000)
- );
-}
-
-
-/*
- * This function is called to register the IMAP extension with Citadel.
- */
-CTDL_MODULE_INIT(imap)
-{
- CtdlRegisterServiceHook(config.c_imap_port,
- NULL, imap_greeting, imap_command_loop, NULL);
-#ifdef HAVE_OPENSSL
- CtdlRegisterServiceHook(config.c_imaps_port,
- NULL, imaps_greeting, imap_command_loop, NULL);
-#endif
- CtdlRegisterSessionHook(imap_cleanup_function, EVT_STOP);
-
- /* return our Subversion id for the Log */
- return "$Id$";
-}