-/* $Id$
+/*
+ * $Id$
*
* IMAP server for the Citadel/UX system
- * Copyright (C) 2000 by Art Cancro and others.
+ * Copyright (C) 2000-2002 by Art Cancro and others.
* This code is released under the terms of the GNU General Public License.
*
- * Current status of standards conformance:
+ * WARNING: this is a workable implementation, but it could use some
+ * additional tweaking. Some commands may be implemented incompletely. The
+ * 'SEARCH' command is not implemented at all.
*
- * *** ABSOLUTELY NOTHING WORKS ***
- *
+ * WARNING: Mark Crispin is an idiot. IMAP is the most brain-damaged protocol
+ * you will ever have the profound lack of pleasure to encounter.
*/
#include "sysdep.h"
#include <pwd.h>
#include <errno.h>
#include <sys/types.h>
-#include <sys/time.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>
+
+#ifdef HAVE_OPENSSL
+#include <openssl/ssl.h>
+#include <openssl/err.h>
+#include <openssl/rand.h>
+#endif
+
#include "citadel.h"
#include "server.h"
-#include <time.h>
#include "sysdep_decls.h"
#include "citserver.h"
#include "support.h"
#include "config.h"
-#include "dynloader.h"
+#include "serv_extensions.h"
#include "room_ops.h"
#include "user_ops.h"
#include "policy.h"
#include "tools.h"
#include "internet_addressing.h"
#include "serv_imap.h"
+#include "imap_tools.h"
+#include "imap_fetch.h"
+#include "imap_search.h"
+#include "imap_store.h"
+#include "imap_misc.h"
+
+#ifdef HAVE_OPENSSL
+#include "serv_crypto.h"
+#endif
+
+/* 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;
+};
long SYM_IMAP;
+/*
+ * If there is a message ID map in memory, free it
+ */
+void imap_free_msgids(void) {
+ if (IMAP->msgids != NULL) {
+ phree(IMAP->msgids);
+ IMAP->msgids = NULL;
+ IMAP->num_msgs = 0;
+ }
+ if (IMAP->flags != NULL) {
+ phree(IMAP->flags);
+ IMAP->flags = NULL;
+ }
+}
+
+
+/*
+ * If there is a transmitted message in memory, free it
+ */
+void imap_free_transmitted_message(void) {
+ if (IMAP->transmitted_message != NULL) {
+ phree(IMAP->transmitted_message);
+ IMAP->transmitted_message = NULL;
+ IMAP->transmitted_length = 0;
+ }
+}
+
+
+/*
+ * Set the \\Seen flag for messages which aren't new
+ */
+void imap_set_seen_flags(void) {
+ struct visit vbuf;
+ int i;
+
+ CtdlGetRelationship(&vbuf, &CC->user, &CC->room);
+ if (IMAP->num_msgs > 0) {
+ for (i=0; i<IMAP->num_msgs; ++i) {
+ if (is_msg_in_mset(vbuf.v_seen, IMAP->msgids[i])) {
+ IMAP->flags[i] |= IMAP_SEEN;
+ }
+ }
+ }
+}
+
+
+
+
+/*
+ * 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 = IMAP->num_msgs + 1;
+ if (IMAP->msgids == NULL) {
+ IMAP->msgids = mallok(IMAP->num_msgs * sizeof(long)
+ * REALLOC_INCREMENT);
+ }
+ else if (IMAP->num_msgs % REALLOC_INCREMENT == 0) {
+ IMAP->msgids = reallok(IMAP->msgids,
+ (IMAP->num_msgs + REALLOC_INCREMENT) * sizeof(long));
+ }
+ if (IMAP->flags == NULL) {
+ IMAP->flags = mallok(IMAP->num_msgs * sizeof(long)
+ * REALLOC_INCREMENT);
+ }
+ else if (IMAP->num_msgs % REALLOC_INCREMENT == 0) {
+ IMAP->flags = reallok(IMAP->flags,
+ (IMAP->num_msgs + REALLOC_INCREMENT) * 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) {
+
+ if (IMAP->selected == 0) {
+ lprintf(5, "imap_load_msgids() can't run; no room selected\n");
+ return;
+ }
+
+ imap_free_msgids(); /* If there was already a map, free it */
+
+ CtdlForEachMessage(MSGS_ALL, 0L, NULL, NULL,
+ imap_add_single_msgid, NULL);
+
+ imap_set_seen_flags();
+ lprintf(9, "imap_load_msgids() mapped %d messages\n", IMAP->num_msgs);
+}
+
+
+/*
+ * 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;
+ int message_still_exists;
+ struct cdbdata *cdbfr;
+ long *msglist = NULL;
+ int num_msgs = 0;
+
+
+ if (IMAP->selected == 0) {
+ lprintf(5, "imap_load_msgids() can't run; no room selected\n");
+ 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 = mallok(cdbfr->len);
+ memcpy(msglist, cdbfr->ptr, 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)
+ for (i=0; i<IMAP->num_msgs; ++i) {
+
+ message_still_exists = 0;
+ if (num_msgs > 0) for (j = 0; j < num_msgs; ++j) {
+ if (msglist[j] == IMAP->msgids[i]) {
+ message_still_exists = 1;
+ }
+ }
+
+ 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();
+
+ /*
+ * If new messages have arrived, tell the client about them.
+ */
+ if (IMAP->num_msgs > original_num_msgs) {
+ cprintf("* %d EXISTS\r\n", IMAP->num_msgs);
+ }
+
+ if (num_msgs != 0) phree(msglist);
+}
+
+
+
+
+
+
+
/*
* This cleanup function blows away the temporary memory and files used by
* the IMAP server.
if (CC->h_command_function != imap_command_loop) return;
lprintf(9, "Performing IMAP cleanup hook\n");
-
-
+ imap_free_msgids();
+ imap_free_transmitted_message();
lprintf(9, "Finished IMAP cleanup hook\n");
}
void imap_greeting(void) {
strcpy(CC->cs_clientname, "IMAP session");
- CC->internal_pgm = 1;
CtdlAllocUserData(SYM_IMAP, sizeof(struct citimap));
+ IMAP->authstate = imap_as_normal;
cprintf("* OK %s Citadel/UX IMAP4rev1 server ready\r\n",
config.c_fqdn);
/*
* implements the LOGIN command (ordinary username/password login)
*/
-void imap_login(char *tag, char *cmd, char *parms) {
- char username[256];
- char password[256];
+void imap_login(int num_parms, char *parms[]) {
+ if (CtdlLoginExistingUser(parms[2]) == login_ok) {
+ if (CtdlTryPassword(parms[3]) == pass_ok) {
+ cprintf("%s OK login successful\r\n", parms[0]);
+ 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 (!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;
+ }
+
+ else {
+ cprintf("%s NO AUTHENTICATE %s failed\r\n",
+ parms[0], parms[1]);
+ }
+}
+
+void imap_auth_login_user(char *cmd) {
+ char buf[SIZ];
+
+ CtdlDecodeBase64(buf, cmd, SIZ);
+ CtdlLoginExistingUser(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 CAPABILITY command
+ */
+void imap_capability(int num_parms, char *parms[]) {
+ cprintf("* CAPABILITY IMAP4 IMAP4REV1 AUTH=LOGIN");
+#ifdef HAVE_OPENSSL
+ cprintf(" STARTTLS");
+#endif
+ cprintf("\r\n");
+ cprintf("%s OK CAPABILITY completed\r\n", parms[0]);
+}
+
+
+/*
+ * implements the STARTTLS command
+ */
+#ifdef HAVE_OPENSSL
+void imap_starttls(int num_parms, char *parms[]) {
+ int retval, bits, alg_bits;
+
+ if (!ssl_ctx) {
+ cprintf("%s NO No SSL_CTX available\r\n", parms[0]);
+ return;
+ }
+ if (!(CC->ssl = SSL_new(ssl_ctx))) {
+ lprintf(2, "SSL_new failed: %s\n",
+ ERR_reason_error_string(ERR_peek_error()));
+ cprintf("%s NO SSL_new: %s\r\n", parms[0],
+ ERR_reason_error_string(ERR_get_error()));
+ return;
+ }
+ if (!(SSL_set_fd(CC->ssl, CC->client_socket))) {
+ lprintf(2, "SSL_set_fd failed: %s\n",
+ ERR_reason_error_string(ERR_peek_error()));
+ SSL_free(CC->ssl);
+ CC->ssl = NULL;
+ cprintf("%s NO SSL_set_fd: %s\r\n", parms[0],
+ ERR_reason_error_string(ERR_get_error()));
+ return;
+ }
+ cprintf("%s OK begin TLS negotiation now\r\n", parms[0]);
+ retval = SSL_accept(CC->ssl);
+ if (retval < 1) {
+ /*
+ * Can't notify the client of an error here; they will
+ * discover the problem at the SSL layer and should
+ * revert to unencrypted communications.
+ */
+ long errval;
+
+ errval = SSL_get_error(CC->ssl, retval);
+ lprintf(2, "SSL_accept failed: %s\n",
+ ERR_reason_error_string(ERR_get_error()));
+ SSL_free(CC->ssl);
+ CC->ssl = NULL;
+ return;
+ }
+ BIO_set_close(CC->ssl->rbio, BIO_NOCLOSE);
+ bits = SSL_CIPHER_get_bits(SSL_get_current_cipher(CC->ssl), &alg_bits);
+ lprintf(3, "SSL/TLS using %s on %s (%d of %d bits)\n",
+ SSL_CIPHER_get_name(SSL_get_current_cipher(CC->ssl)),
+ SSL_CIPHER_get_version(SSL_get_current_cipher(CC->ssl)),
+ bits, alg_bits);
+ CC->redirect_ssl = 1;
+}
+#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 */
+ ra = CtdlRoomAccess(&QRscratch, &CC->user);
+
+ /* 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]);
+ IMAP->selected = 0;
+ return;
+ }
+
+ /*
+ * 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();
+
+ /* FIXME ... much more info needs to be supplied here */
+ cprintf("* %d EXISTS\r\n", msgs);
+ cprintf("* %d RECENT\r\n", new);
+ cprintf("* FLAGS (\\Deleted \\Seen)\r\n");
+ cprintf("* OK [PERMANENTFLAGS (\\Deleted \\Seen)] permanent flags\r\n");
+ cprintf("* OK [UIDVALIDITY 0] UIDs valid\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;
+
+ if (IMAP->num_msgs > 0) for (i=0; i<IMAP->num_msgs; ++i) {
+ if (IMAP->flags[i] & IMAP_DELETED) {
+ CtdlDeleteMessages(CC->room.QRname,
+ IMAP->msgids[i], "");
+ ++num_expunged;
+ lprintf(9, "%ld ... deleted\n", IMAP->msgids[i]);
+ }
+ else {
+ lprintf(9, "%ld ... not deleted\n", IMAP->msgids[i]);
+ }
+ }
+
+ if (num_expunged > 0) {
+ imap_rescan_msgids();
+ }
+
+ 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. */
+ imap_do_expunge();
+
+ IMAP->selected = 0;
+ IMAP->readonly = 0;
+ imap_free_msgids();
+ cprintf("%s OK CLOSE completed\r\n", parms[0]);
+}
+
+
+
+
+/*
+ * Used by LIST and LSUB to show the floors in the listing
+ */
+void imap_list_floors(char *cmd, char *pattern) {
+ int i;
+ struct floor *fl;
+
+ for (i=0; i<MAXFLOORS; ++i) {
+ fl = cgetfloor(i);
+ if (fl->f_flags & F_INUSE) {
+ if (imap_mailbox_matches_pattern(pattern, fl->f_name)) {
+ cprintf("* %s (\\NoSelect) \"|\" ", cmd);
+ imap_strout(fl->f_name);
+ cprintf("\r\n");
+ }
+ }
+ }
+}
+
+
+
+/*
+ * Back end for imap_lsub()
+ *
+ * IMAP "subscribed folder" is equivocated to Citadel "known rooms." This
+ * may or may not be the desired behavior in the future.
+ */
+void imap_lsub_listroom(struct ctdlroom *qrbuf, void *data) {
+ char buf[SIZ];
+ int ra;
+ char *pattern;
+
+ pattern = (char *)data;
+
+ /* Only list rooms to which the user has access!! */
+ ra = CtdlRoomAccess(qrbuf, &CC->user);
+ if (ra & UA_KNOWN) {
+ imap_mailboxname(buf, sizeof buf, qrbuf);
+ if (imap_mailbox_matches_pattern(pattern, buf)) {
+ cprintf("* LSUB () \"|\" ");
+ imap_strout(buf);
+ cprintf("\r\n");
+ }
+ }
+}
+
+
+/*
+ * Implements the LSUB command
+ */
+void imap_lsub(int num_parms, char *parms[]) {
+ char pattern[SIZ];
+ if (num_parms < 4) {
+ cprintf("%s BAD arguments invalid\r\n", parms[0]);
+ return;
+ }
+ snprintf(pattern, sizeof pattern, "%s%s", parms[2], parms[3]);
+
+ if (strlen(parms[3])==0) {
+ cprintf("* LIST (\\Noselect) \"|\" \"\"\r\n");
+ }
+
+ else {
+ imap_list_floors("LSUB", pattern);
+ ForEachRoom(imap_lsub_listroom, pattern);
+ }
+
+ cprintf("%s OK LSUB completed\r\n", parms[0]);
+}
+
+
+
+/*
+ * Back end for imap_list()
+ */
+void imap_list_listroom(struct ctdlroom *qrbuf, void *data) {
+ char buf[SIZ];
+ int ra;
+ char *pattern;
+
+ pattern = (char *)data;
+
+ /* Only list rooms to which the user has access!! */
+ ra = CtdlRoomAccess(qrbuf, &CC->user);
+ if ( (ra & UA_KNOWN)
+ || ((ra & UA_GOTOALLOWED) && (ra & UA_ZAPPED))) {
+ imap_mailboxname(buf, sizeof buf, qrbuf);
+ if (imap_mailbox_matches_pattern(pattern, buf)) {
+ cprintf("* LIST () \"|\" ");
+ imap_strout(buf);
+ cprintf("\r\n");
+ }
+ }
+}
+
+
+/*
+ * Implements the LIST command
+ */
+void imap_list(int num_parms, char *parms[]) {
+ char pattern[SIZ];
+ if (num_parms < 4) {
+ cprintf("%s BAD arguments invalid\r\n", parms[0]);
+ return;
+ }
+ snprintf(pattern, sizeof pattern, "%s%s", parms[2], parms[3]);
+
+ if (strlen(parms[3])==0) {
+ cprintf("* LIST (\\Noselect) \"|\" \"\"\r\n");
+ }
+
+ else {
+ imap_list_floors("LIST", pattern);
+ ForEachRoom(imap_list_listroom, pattern);
+ }
+
+ cprintf("%s OK LIST 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;
+
+ if (strchr(parms[2], '\\') != NULL) {
+ cprintf("%s NO Invalid character in folder name\r\n", parms[0]);
+ return;
+ }
+
+ ret = imap_roomname(roomname, sizeof roomname, parms[2]);
+ if (ret < 0) {
+ cprintf("%s NO Invalid mailbox name or location\r\n",
+ parms[0]);
+ return;
+ }
+ floornum = ( ret & 0x00ff ); /* lower 8 bits = floor number */
+ flags = ( ret & 0xff00 ); /* upper 8 bits = flags */
+
+ if (flags & IR_MAILBOX) {
+ newroomtype = 4; /* private mailbox */
+ }
+ else {
+ newroomtype = 0; /* public folder */
+ }
+
+ lprintf(7, "Create new room <%s> on floor <%d> with type <%d>\n",
+ roomname, floornum, newroomtype);
+
+ ret = create_room(roomname, newroomtype, "", floornum, 1, 0);
+ if (ret == 0) {
+ cprintf("%s NO Mailbox already exists, or create failed\r\n",
+ parms[0]);
+ }
+ else {
+ cprintf("%s OK CREATE completed\r\n", parms[0]);
+ }
+}
+
+
+/*
+ * Locate a room by its IMAP folder name, and check access to it
+ */
+int imap_grabroom(char *returned_roomname, char *foldername) {
+ 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 */
+ ra = CtdlRoomAccess(&QRscratch, &CC->user);
+
+ /* normal clients have to pass through security */
+ if (ra & UA_KNOWN) {
+ 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]);
+ 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 0 "); /* FIXME we need to implement this */
+ 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]);
+ 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, 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]);
+ 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]);
+ 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)) {
+ cprintf("%s OK DELETE completed\r\n", parms[0]);
+ delete_room(&CC->room);
+ }
+ 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 *) mallok(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);
+ }
+
+ /* 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);
- extract_token(username, parms, 0, ' ');
- extract_token(password, parms, 1, ' ');
+ /* ... 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(5, "CtdlRenameRoom() error %d\n", r);
+ }
+ irlp = irl;
+ irl = irl->next;
+ phree(irlp);
+ }
+ }
- cprintf("%s BAD hi <%s> <%s>\r\n", username, password);
+ cprintf("%s OK RENAME completed\r\n", parms[0]);
}
+
/*
* Main command loop for IMAP sessions.
*/
void imap_command_loop(void) {
- char cmdbuf[256];
- char tag[256];
- char cmd[256];
+ char cmdbuf[SIZ];
+ char *parms[SIZ];
+ int num_parms;
time(&CC->lastcmd);
memset(cmdbuf, 0, sizeof cmdbuf); /* Clear it, just in case */
return;
}
- lprintf(5, "citserver[%3d]: %s\r\n", CC->cs_pid, cmdbuf);
+ lprintf(5, "IMAP: %s\r\n", cmdbuf);
while (strlen(cmdbuf) < 5) strcat(cmdbuf, " ");
if (cmdbuf[strlen(cmdbuf)-1]=='\r') cmdbuf[strlen(cmdbuf)-1]=0;
striplt(cmdbuf);
- /* grab the tag */
- extract_token(tag, cmdbuf, 0, ' ');
- extract_token(cmd, cmdbuf, 1, ' ');
- remove_token(cmdbuf, 0, ' ');
- remove_token(cmdbuf, 0, ' ');
- lprintf(9, "tag=<%s> cmd=<%s> parms=<%s>\n", tag, cmd, 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_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_express_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");
+ }
- if (!strcasecmp(cmd, "NOOP")) {
+ /* The commands below may be executed in any state */
+
+ else if ( (!strcasecmp(parms[1], "NOOP"))
+ || (!strcasecmp(parms[1], "CHECK")) ) {
cprintf("%s OK This command successfully did nothing.\r\n",
- tag);
+ parms[0]);
}
- else if (!strcasecmp(cmd, "LOGOUT")) {
- cprintf("%s OK thank you for using Citadel IMAP\r\n", tag);
+ else if (!strcasecmp(parms[1], "LOGOUT")) {
+ cprintf("* BYE %s logging out\r\n", config.c_fqdn);
+ cprintf("%s OK thank you for using Citadel IMAP\r\n", parms[0]);
CC->kill_me = 1;
return;
}
- else if (!strcasecmp(cmd, "LOGIN")) {
- imap_login(tag, cmd, cmdbuf);
+ 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", tag);
+ 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_lsub(num_parms, parms);
}
- /* FIXME ... implement commands requiring login here */
+ 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 (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", tag);
+ cprintf("%s BAD command unrecognized\r\n", parms[0]);
}
+ /* If the client transmitted a message we can free it now */
+ imap_free_transmitted_message();
}
-char *Dynamic_Module_Init(void)
+/*
+ * This function is called to register the IMAP extension with Citadel.
+ */
+char *serv_imap_init(void)
{
SYM_IMAP = CtdlGetDynamicSymbol();
- CtdlRegisterServiceHook(143, /* FIXME put in config setup */
+ CtdlRegisterServiceHook(config.c_imap_port,
NULL,
imap_greeting,
imap_command_loop);
projects / citadel.git / blobdiff