4 * This module is an SMTP and ESMTP implementation for the Citadel system.
5 * It is compliant with all of the following:
7 * RFC 821 - Simple Mail Transfer Protocol
8 * RFC 876 - Survey of SMTP Implementations
9 * RFC 1047 - Duplicate messages and SMTP
10 * RFC 1652 - 8 bit MIME
11 * RFC 1869 - Extended Simple Mail Transfer Protocol
12 * RFC 1870 - SMTP Service Extension for Message Size Declaration
13 * RFC 2033 - Local Mail Transfer Protocol
14 * RFC 2197 - SMTP Service Extension for Command Pipelining
15 * RFC 2476 - Message Submission
16 * RFC 2487 - SMTP Service Extension for Secure SMTP over TLS
17 * RFC 2554 - SMTP Service Extension for Authentication
18 * RFC 2821 - Simple Mail Transfer Protocol
19 * RFC 2822 - Internet Message Format
20 * RFC 2920 - SMTP Service Extension for Command Pipelining
22 * The VRFY and EXPN commands have been removed from this implementation
23 * because nobody uses these commands anymore, except for spammers.
25 * Copyright (c) 1998-2009 by the citadel.org team
27 * This program is free software; you can redistribute it and/or modify
28 * it under the terms of the GNU General Public License as published by
29 * the Free Software Foundation; either version 3 of the License, or
30 * (at your option) any later version.
32 * This program is distributed in the hope that it will be useful,
33 * but WITHOUT ANY WARRANTY; without even the implied warranty of
34 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
35 * GNU General Public License for more details.
37 * You should have received a copy of the GNU General Public License
38 * along with this program; if not, write to the Free Software
39 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
50 #include <sys/types.h>
53 #if TIME_WITH_SYS_TIME
54 # include <sys/time.h>
58 # include <sys/time.h>
68 #include <sys/socket.h>
69 #include <netinet/in.h>
70 #include <arpa/inet.h>
71 #include <libcitadel.h>
74 #include "citserver.h"
81 #include "internet_addressing.h"
84 #include "clientsocket.h"
85 #include "locate_host.h"
86 #include "citadel_dirs.h"
95 #include "ctdl_module.h"
99 typedef struct _citsmtp { /* Information about the current session */
103 char recipients[SIZ];
104 int number_of_recipients;
106 int message_originated_locally;
112 enum { /* Command states for login authentication */
119 #define SMTP ((citsmtp *)CC->session_specific_data)
122 int run_queue_now = 0; /* Set to 1 to ignore SMTP send retry times */
124 citthread_mutex_t smtp_send_lock;
127 /*****************************************************************************/
128 /* SMTP SERVER (INBOUND) STUFF */
129 /*****************************************************************************/
133 * Here's where our SMTP session begins its happy day.
135 void smtp_greeting(int is_msa)
138 char message_to_spammer[1024];
140 strcpy(CC->cs_clientname, "SMTP session");
141 CC->internal_pgm = 1;
142 CC->cs_flags |= CS_STEALTH;
143 CC->session_specific_data = malloc(sizeof(citsmtp));
144 memset(SMTP, 0, sizeof(citsmtp));
146 sSMTP->is_msa = is_msa;
148 /* If this config option is set, reject connections from problem
149 * addresses immediately instead of after they execute a RCPT
151 if ( (config.c_rbl_at_greeting) && (sSMTP->is_msa == 0) ) {
152 if (rbl_check(message_to_spammer)) {
153 if (CtdlThreadCheckStop())
154 cprintf("421 %s\r\n", message_to_spammer);
156 cprintf("550 %s\r\n", message_to_spammer);
158 /* no need to free_recipients(valid), it's not allocated yet */
163 /* Otherwise we're either clean or we check later. */
165 if (CC->nologin==1) {
166 cprintf("500 Too many users are already online (maximum is %d)\r\n",
170 /* no need to free_recipients(valid), it's not allocated yet */
174 /* Note: the FQDN *must* appear as the first thing after the 220 code.
175 * Some clients (including citmail.c) depend on it being there.
177 cprintf("220 %s ESMTP Citadel server ready.\r\n", config.c_fqdn);
182 * SMTPS is just like SMTP, except it goes crypto right away.
184 void smtps_greeting(void) {
185 CtdlModuleStartCryptoMsgs(NULL, NULL, NULL);
187 if (!CC->redirect_ssl) CC->kill_me = 1; /* kill session if no crypto */
194 * SMTP MSA port requires authentication.
196 void smtp_msa_greeting(void) {
202 * LMTP is like SMTP but with some extra bonus footage added.
204 void lmtp_greeting(void) {
214 * Generic SMTP MTA greeting
216 void smtp_mta_greeting(void) {
222 * We also have an unfiltered LMTP socket that bypasses spam filters.
224 void lmtp_unfiltered_greeting(void) {
230 sSMTP->is_unfiltered = 1;
235 * Login greeting common to all auth methods
237 void smtp_auth_greeting(void) {
238 cprintf("235 Hello, %s\r\n", CC->user.fullname);
239 CtdlLogPrintf(CTDL_NOTICE, "SMTP authenticated %s\n", CC->user.fullname);
240 CC->internal_pgm = 0;
241 CC->cs_flags &= ~CS_STEALTH;
246 * Implement HELO and EHLO commands.
248 * which_command: 0=HELO, 1=EHLO, 2=LHLO
250 void smtp_hello(char *argbuf, int which_command) {
251 citsmtp *sSMTP = SMTP;
253 safestrncpy(sSMTP->helo_node, argbuf, sizeof sSMTP->helo_node);
255 if ( (which_command != 2) && (sSMTP->is_lmtp) ) {
256 cprintf("500 Only LHLO is allowed when running LMTP\r\n");
260 if ( (which_command == 2) && (sSMTP->is_lmtp == 0) ) {
261 cprintf("500 LHLO is only allowed when running LMTP\r\n");
265 if (which_command == 0) {
266 cprintf("250 Hello %s (%s [%s])\r\n",
273 if (which_command == 1) {
274 cprintf("250-Hello %s (%s [%s])\r\n",
281 cprintf("250-Greetings and joyous salutations.\r\n");
283 cprintf("250-HELP\r\n");
284 cprintf("250-SIZE %ld\r\n", config.c_maxmsglen);
288 * Offer TLS, but only if TLS is not already active.
289 * Furthermore, only offer TLS when running on
290 * the SMTP-MSA port, not on the SMTP-MTA port, due to
291 * questionable reliability of TLS in certain sending MTA's.
293 if ( (!CC->redirect_ssl) && (sSMTP->is_msa) ) {
294 cprintf("250-STARTTLS\r\n");
296 #endif /* HAVE_OPENSSL */
298 cprintf("250-AUTH LOGIN PLAIN\r\n"
299 "250-AUTH=LOGIN PLAIN\r\n"
308 * Implement HELP command.
310 void smtp_help(void) {
311 cprintf("214 RTFM http://www.ietf.org/rfc/rfc2821.txt\r\n");
318 void smtp_get_user(char *argbuf) {
321 citsmtp *sSMTP = SMTP;
323 CtdlDecodeBase64(username, argbuf, SIZ);
324 /* CtdlLogPrintf(CTDL_DEBUG, "Trying <%s>\n", username); */
325 if (CtdlLoginExistingUser(NULL, username) == login_ok) {
326 CtdlEncodeBase64(buf, "Password:", 9, 0);
327 cprintf("334 %s\r\n", buf);
328 sSMTP->command_state = smtp_password;
331 cprintf("500 No such user.\r\n");
332 sSMTP->command_state = smtp_command;
340 void smtp_get_pass(char *argbuf) {
344 memset(password, 0, sizeof(password));
345 len = CtdlDecodeBase64(password, argbuf, SIZ);
346 /* CtdlLogPrintf(CTDL_DEBUG, "Trying <%s>\n", password); */
347 if (CtdlTryPassword(password, len) == pass_ok) {
348 smtp_auth_greeting();
351 cprintf("535 Authentication failed.\r\n");
353 SMTP->command_state = smtp_command;
358 * Back end for PLAIN auth method (either inline or multistate)
360 void smtp_try_plain(char *encoded_authstring) {
361 char decoded_authstring[1024];
368 CtdlDecodeBase64(decoded_authstring, encoded_authstring, strlen(encoded_authstring) );
369 safestrncpy(ident, decoded_authstring, sizeof ident);
370 safestrncpy(user, &decoded_authstring[strlen(ident) + 1], sizeof user);
371 len = safestrncpy(pass, &decoded_authstring[strlen(ident) + strlen(user) + 2], sizeof pass);
373 len = sizeof(pass) - 1;
375 SMTP->command_state = smtp_command;
377 if (!IsEmptyStr(ident)) {
378 result = CtdlLoginExistingUser(user, ident);
381 result = CtdlLoginExistingUser(NULL, user);
384 if (result == login_ok) {
385 if (CtdlTryPassword(pass, len) == pass_ok) {
386 smtp_auth_greeting();
390 cprintf("504 Authentication failed.\r\n");
395 * Attempt to perform authenticated SMTP
397 void smtp_auth(char *argbuf) {
398 char username_prompt[64];
400 char encoded_authstring[1024];
403 cprintf("504 Already logged in.\r\n");
407 extract_token(method, argbuf, 0, ' ', sizeof method);
409 if (!strncasecmp(method, "login", 5) ) {
410 if (strlen(argbuf) >= 7) {
411 smtp_get_user(&argbuf[6]);
414 CtdlEncodeBase64(username_prompt, "Username:", 9, 0);
415 cprintf("334 %s\r\n", username_prompt);
416 SMTP->command_state = smtp_user;
421 if (!strncasecmp(method, "plain", 5) ) {
422 if (num_tokens(argbuf, ' ') < 2) {
424 SMTP->command_state = smtp_plain;
428 extract_token(encoded_authstring, argbuf, 1, ' ', sizeof encoded_authstring);
430 smtp_try_plain(encoded_authstring);
434 if (strncasecmp(method, "login", 5) ) {
435 cprintf("504 Unknown authentication method.\r\n");
443 * Implements the RSET (reset state) command.
444 * Currently this just zeroes out the state buffer. If pointers to data
445 * allocated with malloc() are ever placed in the state buffer, we have to
446 * be sure to free() them first!
448 * Set do_response to nonzero to output the SMTP RSET response code.
450 void smtp_rset(int do_response) {
453 citsmtp *sSMTP = SMTP;
456 * Our entire SMTP state is discarded when a RSET command is issued,
457 * but we need to preserve this one little piece of information, so
458 * we save it for later.
460 is_lmtp = sSMTP->is_lmtp;
461 is_unfiltered = sSMTP->is_unfiltered;
463 memset(sSMTP, 0, sizeof(citsmtp));
466 * It is somewhat ambiguous whether we want to log out when a RSET
467 * command is issued. Here's the code to do it. It is commented out
468 * because some clients (such as Pine) issue RSET commands before
469 * each message, but still expect to be logged in.
471 * if (CC->logged_in) {
477 * Reinstate this little piece of information we saved (see above).
479 sSMTP->is_lmtp = is_lmtp;
480 sSMTP->is_unfiltered = is_unfiltered;
483 cprintf("250 Zap!\r\n");
488 * Clear out the portions of the state buffer that need to be cleared out
489 * after the DATA command finishes.
491 void smtp_data_clear(void) {
492 citsmtp *sSMTP = SMTP;
494 strcpy(sSMTP->from, "");
495 strcpy(sSMTP->recipients, "");
496 sSMTP->number_of_recipients = 0;
497 sSMTP->delivery_mode = 0;
498 sSMTP->message_originated_locally = 0;
501 const char *smtp_get_Recipients(void)
503 citsmtp *sSMTP = SMTP;
507 else return sSMTP->from;
511 * Implements the "MAIL FROM:" command
513 void smtp_mail(char *argbuf) {
517 citsmtp *sSMTP = SMTP;
519 if (!IsEmptyStr(sSMTP->from)) {
520 cprintf("503 Only one sender permitted\r\n");
524 if (strncasecmp(argbuf, "From:", 5)) {
525 cprintf("501 Syntax error\r\n");
529 strcpy(sSMTP->from, &argbuf[5]);
530 striplt(sSMTP->from);
531 if (haschar(sSMTP->from, '<') > 0) {
532 stripallbut(sSMTP->from, '<', '>');
535 /* We used to reject empty sender names, until it was brought to our
536 * attention that RFC1123 5.2.9 requires that this be allowed. So now
537 * we allow it, but replace the empty string with a fake
538 * address so we don't have to contend with the empty string causing
539 * other code to fail when it's expecting something there.
541 if (IsEmptyStr(sSMTP->from)) {
542 strcpy(sSMTP->from, "someone@example.com");
545 /* If this SMTP connection is from a logged-in user, force the 'from'
546 * to be the user's Internet e-mail address as Citadel knows it.
549 safestrncpy(sSMTP->from, CC->cs_inet_email, sizeof sSMTP->from);
550 cprintf("250 Sender ok <%s>\r\n", sSMTP->from);
551 sSMTP->message_originated_locally = 1;
555 else if (sSMTP->is_lmtp) {
556 /* Bypass forgery checking for LMTP */
559 /* Otherwise, make sure outsiders aren't trying to forge mail from
560 * this system (unless, of course, c_allow_spoofing is enabled)
562 else if (config.c_allow_spoofing == 0) {
563 process_rfc822_addr(sSMTP->from, user, node, name);
564 if (CtdlHostAlias(node) != hostalias_nomatch) {
565 cprintf("550 You must log in to send mail from %s\r\n", node);
566 strcpy(sSMTP->from, "");
571 cprintf("250 Sender ok\r\n");
577 * Implements the "RCPT To:" command
579 void smtp_rcpt(char *argbuf) {
581 char message_to_spammer[SIZ];
582 struct recptypes *valid = NULL;
583 citsmtp *sSMTP = SMTP;
585 if (IsEmptyStr(sSMTP->from)) {
586 cprintf("503 Need MAIL before RCPT\r\n");
590 if (strncasecmp(argbuf, "To:", 3)) {
591 cprintf("501 Syntax error\r\n");
595 if ( (sSMTP->is_msa) && (!CC->logged_in) ) {
596 cprintf("550 You must log in to send mail on this port.\r\n");
597 strcpy(sSMTP->from, "");
601 safestrncpy(recp, &argbuf[3], sizeof recp);
603 stripallbut(recp, '<', '>');
605 if ( (strlen(recp) + strlen(sSMTP->recipients) + 1 ) >= SIZ) {
606 cprintf("452 Too many recipients\r\n");
611 if ( (!CC->logged_in) /* Don't RBL authenticated users */
612 && (!sSMTP->is_lmtp) ) { /* Don't RBL LMTP clients */
613 if (config.c_rbl_at_greeting == 0) { /* Don't RBL again if we already did it */
614 if (rbl_check(message_to_spammer)) {
615 if (CtdlThreadCheckStop())
616 cprintf("421 %s\r\n", message_to_spammer);
618 cprintf("550 %s\r\n", message_to_spammer);
619 /* no need to free_recipients(valid), it's not allocated yet */
625 valid = validate_recipients(recp,
626 smtp_get_Recipients (),
627 (sSMTP->is_lmtp)? POST_LMTP:
628 (CC->logged_in)? POST_LOGGED_IN:
630 if (valid->num_error != 0) {
631 cprintf("550 %s\r\n", valid->errormsg);
632 free_recipients(valid);
636 if (valid->num_internet > 0) {
638 if (CtdlCheckInternetMailPermission(&CC->user)==0) {
639 cprintf("551 <%s> - you do not have permission to send Internet mail\r\n", recp);
640 free_recipients(valid);
646 if (valid->num_internet > 0) {
647 if ( (sSMTP->message_originated_locally == 0)
648 && (sSMTP->is_lmtp == 0) ) {
649 cprintf("551 <%s> - relaying denied\r\n", recp);
650 free_recipients(valid);
655 cprintf("250 RCPT ok <%s>\r\n", recp);
656 if (!IsEmptyStr(sSMTP->recipients)) {
657 strcat(sSMTP->recipients, ",");
659 strcat(sSMTP->recipients, recp);
660 sSMTP->number_of_recipients += 1;
662 free_recipients(valid);
670 * Implements the DATA command
672 void smtp_data(void) {
674 char *defbody; //TODO: remove me
675 struct CtdlMessage *msg = NULL;
678 struct recptypes *valid;
682 citsmtp *sSMTP = SMTP;
684 if (IsEmptyStr(sSMTP->from)) {
685 cprintf("503 Need MAIL command first.\r\n");
689 if (sSMTP->number_of_recipients < 1) {
690 cprintf("503 Need RCPT command first.\r\n");
694 cprintf("354 Transmit message now - terminate with '.' by itself\r\n");
696 datestring(nowstamp, sizeof nowstamp, time(NULL), DATESTRING_RFC822);
697 defbody = malloc(4096);
699 if (defbody != NULL) {
700 if (sSMTP->is_lmtp && (CC->cs_UDSclientUID != -1)) {
701 snprintf(defbody, 4096,
702 "Received: from %s (Citadel from userid %ld)\n"
705 (long int) CC->cs_UDSclientUID,
710 snprintf(defbody, 4096,
711 "Received: from %s (%s [%s])\n"
720 body = CtdlReadMessageBodyBuf(HKEY("."), config.c_maxmsglen, defbody, 1, NULL);
722 cprintf("550 Unable to save message: internal error.\r\n");
726 CtdlLogPrintf(CTDL_DEBUG, "Converting message...\n");
727 msg = convert_internet_message_buf(&body);
729 /* If the user is locally authenticated, FORCE the From: header to
730 * show up as the real sender. Yes, this violates the RFC standard,
731 * but IT MAKES SENSE. If you prefer strict RFC adherence over
732 * common sense, you can disable this in the configuration.
734 * We also set the "message room name" ('O' field) to MAILROOM
735 * (which is Mail> on most systems) to prevent it from getting set
736 * to something ugly like "0000058008.Sent Items>" when the message
737 * is read with a Citadel client.
739 if ( (CC->logged_in) && (config.c_rfc822_strict_from == 0) ) {
740 if (msg->cm_fields['A'] != NULL) free(msg->cm_fields['A']);
741 if (msg->cm_fields['N'] != NULL) free(msg->cm_fields['N']);
742 if (msg->cm_fields['H'] != NULL) free(msg->cm_fields['H']);
743 if (msg->cm_fields['F'] != NULL) free(msg->cm_fields['F']);
744 if (msg->cm_fields['O'] != NULL) free(msg->cm_fields['O']);
745 msg->cm_fields['A'] = strdup(CC->user.fullname);
746 msg->cm_fields['N'] = strdup(config.c_nodename);
747 msg->cm_fields['H'] = strdup(config.c_humannode);
748 msg->cm_fields['F'] = strdup(CC->cs_inet_email);
749 msg->cm_fields['O'] = strdup(MAILROOM);
752 /* Set the "envelope from" address */
753 if (msg->cm_fields['P'] != NULL) {
754 free(msg->cm_fields['P']);
756 msg->cm_fields['P'] = strdup(sSMTP->from);
758 /* Set the "envelope to" address */
759 if (msg->cm_fields['V'] != NULL) {
760 free(msg->cm_fields['V']);
762 msg->cm_fields['V'] = strdup(sSMTP->recipients);
764 /* Submit the message into the Citadel system. */
765 valid = validate_recipients(sSMTP->recipients,
766 smtp_get_Recipients (),
767 (sSMTP->is_lmtp)? POST_LMTP:
768 (CC->logged_in)? POST_LOGGED_IN:
771 /* If there are modules that want to scan this message before final
772 * submission (such as virus checkers or spam filters), call them now
773 * and give them an opportunity to reject the message.
775 if (sSMTP->is_unfiltered) {
779 scan_errors = PerformMessageHooks(msg, EVT_SMTPSCAN);
782 if (scan_errors > 0) { /* We don't want this message! */
784 if (msg->cm_fields['0'] == NULL) {
785 msg->cm_fields['0'] = strdup("Message rejected by filter");
788 sprintf(result, "550 %s\r\n", msg->cm_fields['0']);
791 else { /* Ok, we'll accept this message. */
792 msgnum = CtdlSubmitMsg(msg, valid, "", 0);
794 sprintf(result, "250 Message accepted.\r\n");
797 sprintf(result, "550 Internal delivery error\r\n");
801 /* For SMTP and ESTMP, just print the result message. For LMTP, we
802 * have to print one result message for each recipient. Since there
803 * is nothing in Citadel which would cause different recipients to
804 * have different results, we can get away with just spitting out the
805 * same message once for each recipient.
807 if (sSMTP->is_lmtp) {
808 for (i=0; i<sSMTP->number_of_recipients; ++i) {
809 cprintf("%s", result);
813 cprintf("%s", result);
816 /* Write something to the syslog (which may or may not be where the
817 * rest of the Citadel logs are going; some sysadmins want LOG_MAIL).
820 syslog((LOG_MAIL | LOG_INFO),
821 "%ld: from=<%s>, nrcpts=%d, relay=%s [%s], stat=%s",
824 sSMTP->number_of_recipients,
832 CtdlFreeMessage(msg);
833 free_recipients(valid);
834 smtp_data_clear(); /* clear out the buffers now */
839 * implements the STARTTLS command (Citadel API version)
841 void smtp_starttls(void)
843 char ok_response[SIZ];
844 char nosup_response[SIZ];
845 char error_response[SIZ];
848 "220 Begin TLS negotiation now\r\n");
849 sprintf(nosup_response,
850 "554 TLS not supported here\r\n");
851 sprintf(error_response,
852 "554 Internal error\r\n");
853 CtdlModuleStartCryptoMsgs(ok_response, nosup_response, error_response);
860 * Main command loop for SMTP sessions.
862 void smtp_command_loop(void) {
864 citsmtp *sSMTP = SMTP;
867 CtdlLogPrintf(CTDL_EMERG, "Session SMTP data is null. WTF? We will crash now.\n");
871 memset(cmdbuf, 0, sizeof cmdbuf); /* Clear it, just in case */
872 if (client_getln(cmdbuf, sizeof cmdbuf) < 1) {
873 CtdlLogPrintf(CTDL_CRIT, "Client disconnected: ending session.\n");
877 CtdlLogPrintf(CTDL_INFO, "SMTP server: %s\n", cmdbuf);
878 while (strlen(cmdbuf) < 5) strcat(cmdbuf, " ");
880 if (sSMTP->command_state == smtp_user) {
881 smtp_get_user(cmdbuf);
884 else if (sSMTP->command_state == smtp_password) {
885 smtp_get_pass(cmdbuf);
888 else if (sSMTP->command_state == smtp_plain) {
889 smtp_try_plain(cmdbuf);
892 else if (!strncasecmp(cmdbuf, "AUTH", 4)) {
893 smtp_auth(&cmdbuf[5]);
896 else if (!strncasecmp(cmdbuf, "DATA", 4)) {
900 else if (!strncasecmp(cmdbuf, "HELO", 4)) {
901 smtp_hello(&cmdbuf[5], 0);
904 else if (!strncasecmp(cmdbuf, "EHLO", 4)) {
905 smtp_hello(&cmdbuf[5], 1);
908 else if (!strncasecmp(cmdbuf, "LHLO", 4)) {
909 smtp_hello(&cmdbuf[5], 2);
912 else if (!strncasecmp(cmdbuf, "HELP", 4)) {
916 else if (!strncasecmp(cmdbuf, "MAIL", 4)) {
917 smtp_mail(&cmdbuf[5]);
920 else if (!strncasecmp(cmdbuf, "NOOP", 4)) {
921 cprintf("250 NOOP\r\n");
924 else if (!strncasecmp(cmdbuf, "QUIT", 4)) {
925 cprintf("221 Goodbye...\r\n");
930 else if (!strncasecmp(cmdbuf, "RCPT", 4)) {
931 smtp_rcpt(&cmdbuf[5]);
934 else if (!strncasecmp(cmdbuf, "RSET", 4)) {
938 else if (!strcasecmp(cmdbuf, "STARTTLS")) {
943 cprintf("502 I'm afraid I can't do that.\r\n");
952 /*****************************************************************************/
953 /* SMTP CLIENT (OUTBOUND PROCESSING) STUFF */
954 /*****************************************************************************/
961 * Called by smtp_do_procmsg() to attempt delivery to one SMTP host
964 void smtp_try(const char *key, const char *addr, int *status,
965 char *dsn, size_t n, long msgnum, char *envelope_from)
972 char user[1024], node[1024], name[1024];
987 /* Parse out the host portion of the recipient address */
988 process_rfc822_addr(addr, user, node, name);
990 CtdlLogPrintf(CTDL_DEBUG, "SMTP client: Attempting delivery to <%s> @ <%s> (%s)\n",
993 /* Load the message out of the database */
994 CCC->redirect_buffer = NewStrBufPlain(NULL, SIZ);
995 CtdlOutputMsg(msgnum, MT_RFC822, HEADERS_ALL, 0, 1, NULL, (ESC_DOT|SUPPRESS_ENV_TO) );
996 msg_size = StrLength(CC->redirect_buffer);
997 msgtext = SmashStrBuf(&CC->redirect_buffer);
999 /* If no envelope_from is supplied, extract one from the message */
1000 if ( (envelope_from == NULL) || (IsEmptyStr(envelope_from)) ) {
1001 strcpy(mailfrom, "");
1005 if (ptr = cmemreadline(ptr, buf, sizeof buf), *ptr == 0) {
1008 if (!strncasecmp(buf, "From:", 5)) {
1009 safestrncpy(mailfrom, &buf[5], sizeof mailfrom);
1011 for (i=0; mailfrom[i]; ++i) {
1012 if (!isprint(mailfrom[i])) {
1013 strcpy(&mailfrom[i], &mailfrom[i+1]);
1018 /* Strip out parenthesized names */
1021 for (i=0; mailfrom[i]; ++i) {
1022 if (mailfrom[i] == '(') lp = i;
1023 if (mailfrom[i] == ')') rp = i;
1025 if ((lp>0)&&(rp>lp)) {
1026 strcpy(&mailfrom[lp-1], &mailfrom[rp+1]);
1029 /* Prefer brokketized names */
1032 for (i=0; mailfrom[i]; ++i) {
1033 if (mailfrom[i] == '<') lp = i;
1034 if (mailfrom[i] == '>') rp = i;
1036 if ( (lp>=0) && (rp>lp) ) {
1038 strcpy(mailfrom, &mailfrom[lp]);
1043 } while (scan_done == 0);
1044 if (IsEmptyStr(mailfrom)) strcpy(mailfrom, "someone@somewhere.org");
1045 stripallbut(mailfrom, '<', '>');
1046 envelope_from = mailfrom;
1049 /* Figure out what mail exchanger host we have to connect to */
1050 num_mxhosts = getmx(mxhosts, node);
1051 CtdlLogPrintf(CTDL_DEBUG, "Number of MX hosts for <%s> is %d [%s]\n", node, num_mxhosts, mxhosts);
1052 if (num_mxhosts < 1) {
1054 snprintf(dsn, SIZ, "No MX hosts found for <%s>", node);
1059 for (mx=0; (mx<num_mxhosts && sock < 0); ++mx) {
1061 extract_token(buf, mxhosts, mx, '|', sizeof buf);
1062 strcpy(mx_user, "");
1063 strcpy(mx_pass, "");
1064 if (num_tokens(buf, '@') > 1) {
1065 strcpy (mx_user, buf);
1066 endpart = strrchr(mx_user, '@');
1068 strcpy (mx_host, endpart + 1);
1069 endpart = strrchr(mx_user, ':');
1070 if (endpart != NULL) {
1071 strcpy(mx_pass, endpart+1);
1076 strcpy (mx_host, buf);
1077 endpart = strrchr(mx_host, ':');
1080 strcpy(mx_port, endpart + 1);
1083 strcpy(mx_port, "25");
1085 CtdlLogPrintf(CTDL_DEBUG, "SMTP client: connecting to %s : %s ...\n", mx_host, mx_port);
1086 sock = sock_connect(mx_host, mx_port, "tcp");
1087 snprintf(dsn, SIZ, "Could not connect: %s", strerror(errno));
1088 if (sock >= 0) CtdlLogPrintf(CTDL_DEBUG, "SMTP client: connected!\n");
1091 snprintf(dsn, SIZ, "%s", strerror(errno));
1094 snprintf(dsn, SIZ, "Unable to connect to %s : %s\n", mx_host, mx_port);
1100 *status = 4; /* dsn is already filled in */
1104 CCC->sReadBuf = NewStrBuf();
1105 CCC->sMigrateBuf = NewStrBuf();
1108 /* Process the SMTP greeting from the server */
1109 if (ml_sock_gets(&sock, buf) < 0) {
1111 strcpy(dsn, "Connection broken during SMTP conversation");
1114 CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
1115 if (buf[0] != '2') {
1116 if (buf[0] == '4') {
1118 safestrncpy(dsn, &buf[4], 1023);
1123 safestrncpy(dsn, &buf[4], 1023);
1128 /* At this point we know we are talking to a real SMTP server */
1130 /* Do a EHLO command. If it fails, try the HELO command. */
1131 snprintf(buf, sizeof buf, "EHLO %s\r\n", config.c_fqdn);
1132 CtdlLogPrintf(CTDL_DEBUG, ">%s", buf);
1133 sock_write(&sock, buf, strlen(buf));
1134 if (ml_sock_gets(&sock, buf) < 0) {
1136 strcpy(dsn, "Connection broken during SMTP HELO");
1139 CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
1140 if (buf[0] != '2') {
1141 snprintf(buf, sizeof buf, "HELO %s\r\n", config.c_fqdn);
1142 CtdlLogPrintf(CTDL_DEBUG, ">%s", buf);
1143 sock_write(&sock, buf, strlen(buf));
1144 if (ml_sock_gets(&sock, buf) < 0) {
1146 strcpy(dsn, "Connection broken during SMTP HELO");
1150 if (buf[0] != '2') {
1151 if (buf[0] == '4') {
1153 safestrncpy(dsn, &buf[4], 1023);
1158 safestrncpy(dsn, &buf[4], 1023);
1163 /* Do an AUTH command if necessary */
1164 if (!IsEmptyStr(mx_user)) {
1166 sprintf(buf, "%s%c%s%c%s", mx_user, '\0', mx_user, '\0', mx_pass);
1167 CtdlEncodeBase64(encoded, buf, strlen(mx_user) + strlen(mx_user) + strlen(mx_pass) + 2, 0);
1168 snprintf(buf, sizeof buf, "AUTH PLAIN %s\r\n", encoded);
1169 CtdlLogPrintf(CTDL_DEBUG, ">%s", buf);
1170 sock_write(&sock, buf, strlen(buf));
1171 if (ml_sock_gets(&sock, buf) < 0) {
1173 strcpy(dsn, "Connection broken during SMTP AUTH");
1176 CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
1177 if (buf[0] != '2') {
1178 if (buf[0] == '4') {
1180 safestrncpy(dsn, &buf[4], 1023);
1185 safestrncpy(dsn, &buf[4], 1023);
1191 /* previous command succeeded, now try the MAIL FROM: command */
1192 snprintf(buf, sizeof buf, "MAIL FROM:<%s>\r\n", envelope_from);
1193 CtdlLogPrintf(CTDL_DEBUG, ">%s", buf);
1194 sock_write(&sock, buf, strlen(buf));
1195 if (ml_sock_gets(&sock, buf) < 0) {
1197 strcpy(dsn, "Connection broken during SMTP MAIL");
1200 CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
1201 if (buf[0] != '2') {
1202 if (buf[0] == '4') {
1204 safestrncpy(dsn, &buf[4], 1023);
1209 safestrncpy(dsn, &buf[4], 1023);
1214 /* MAIL succeeded, now try the RCPT To: command */
1215 snprintf(buf, sizeof buf, "RCPT TO:<%s@%s>\r\n", user, node);
1216 CtdlLogPrintf(CTDL_DEBUG, ">%s", buf);
1217 sock_write(&sock, buf, strlen(buf));
1218 if (ml_sock_gets(&sock, buf) < 0) {
1220 strcpy(dsn, "Connection broken during SMTP RCPT");
1223 CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
1224 if (buf[0] != '2') {
1225 if (buf[0] == '4') {
1227 safestrncpy(dsn, &buf[4], 1023);
1232 safestrncpy(dsn, &buf[4], 1023);
1237 /* RCPT succeeded, now try the DATA command */
1238 CtdlLogPrintf(CTDL_DEBUG, ">DATA\n");
1239 sock_write(&sock, "DATA\r\n", 6);
1240 if (ml_sock_gets(&sock, buf) < 0) {
1242 strcpy(dsn, "Connection broken during SMTP DATA");
1245 CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
1246 if (buf[0] != '3') {
1247 if (buf[0] == '4') {
1249 safestrncpy(dsn, &buf[4], 1023);
1254 safestrncpy(dsn, &buf[4], 1023);
1259 /* If we reach this point, the server is expecting data.*/
1260 sock_write(&sock, msgtext, msg_size);
1261 if (msgtext[msg_size-1] != 10) {
1262 CtdlLogPrintf(CTDL_WARNING, "Possible problem: message did not "
1263 "correctly terminate. (expecting 0x10, got 0x%02x)\n",
1265 sock_write(&sock, "\r\n", 2);
1268 sock_write(&sock, ".\r\n", 3);
1269 if (ml_sock_gets(&sock, buf) < 0) {
1271 strcpy(dsn, "Connection broken during SMTP message transmit");
1274 CtdlLogPrintf(CTDL_DEBUG, "%s\n", buf);
1275 if (buf[0] != '2') {
1276 if (buf[0] == '4') {
1278 safestrncpy(dsn, &buf[4], 1023);
1283 safestrncpy(dsn, &buf[4], 1023);
1289 safestrncpy(dsn, &buf[4], 1023);
1292 CtdlLogPrintf(CTDL_DEBUG, ">QUIT\n");
1293 sock_write(&sock, "QUIT\r\n", 6);
1294 ml_sock_gets(&sock, buf);
1295 CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
1296 CtdlLogPrintf(CTDL_INFO, "SMTP client: delivery to <%s> @ <%s> (%s) succeeded\n",
1299 bail: free(msgtext);
1300 FreeStrBuf(&CCC->sReadBuf);
1301 FreeStrBuf(&CCC->sMigrateBuf);
1305 /* Write something to the syslog (which may or may not be where the
1306 * rest of the Citadel logs are going; some sysadmins want LOG_MAIL).
1308 if (enable_syslog) {
1309 syslog((LOG_MAIL | LOG_INFO),
1310 "%ld: to=<%s>, relay=%s, stat=%s",
1324 * smtp_do_bounce() is caled by smtp_do_procmsg() to scan a set of delivery
1325 * instructions for "5" codes (permanent fatal errors) and produce/deliver
1326 * a "bounce" message (delivery status notification).
1328 void smtp_do_bounce(char *instr) {
1336 char bounceto[1024];
1338 int num_bounces = 0;
1339 int bounce_this = 0;
1340 long bounce_msgid = (-1);
1341 time_t submitted = 0L;
1342 struct CtdlMessage *bmsg = NULL;
1344 struct recptypes *valid;
1345 int successful_bounce = 0;
1350 CtdlLogPrintf(CTDL_DEBUG, "smtp_do_bounce() called\n");
1351 strcpy(bounceto, "");
1352 boundary = NewStrBufPlain(HKEY("=_Citadel_Multipart_"));
1353 StrBufAppendPrintf(boundary, "%s_%04x%04x", config.c_fqdn, getpid(), ++seq);
1354 lines = num_tokens(instr, '\n');
1356 /* See if it's time to give up on delivery of this message */
1357 for (i=0; i<lines; ++i) {
1358 extract_token(buf, instr, i, '\n', sizeof buf);
1359 extract_token(key, buf, 0, '|', sizeof key);
1360 extract_token(addr, buf, 1, '|', sizeof addr);
1361 if (!strcasecmp(key, "submitted")) {
1362 submitted = atol(addr);
1366 if ( (time(NULL) - submitted) > SMTP_GIVE_UP ) {
1370 /* Start building our bounce message */
1372 bmsg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
1373 if (bmsg == NULL) return;
1374 memset(bmsg, 0, sizeof(struct CtdlMessage));
1375 BounceMB = NewStrBufPlain(NULL, 1024);
1377 bmsg->cm_magic = CTDLMESSAGE_MAGIC;
1378 bmsg->cm_anon_type = MES_NORMAL;
1379 bmsg->cm_format_type = FMT_RFC822;
1380 bmsg->cm_fields['A'] = strdup("Citadel");
1381 bmsg->cm_fields['O'] = strdup(MAILROOM);
1382 bmsg->cm_fields['N'] = strdup(config.c_nodename);
1383 bmsg->cm_fields['U'] = strdup("Delivery Status Notification (Failure)");
1384 StrBufAppendBufPlain(BounceMB, HKEY("Content-type: multipart/mixed; boundary=\""), 0);
1385 StrBufAppendBuf(BounceMB, boundary, 0);
1386 StrBufAppendBufPlain(BounceMB, HKEY("\"\r\n"), 0);
1387 StrBufAppendBufPlain(BounceMB, HKEY("MIME-Version: 1.0\r\n"), 0);
1388 StrBufAppendBufPlain(BounceMB, HKEY("X-Mailer: " CITADEL "\r\n"), 0);
1389 StrBufAppendBufPlain(BounceMB, HKEY("\r\nThis is a multipart message in MIME format.\r\n\r\n"), 0);
1390 StrBufAppendBufPlain(BounceMB, HKEY("--"), 0);
1391 StrBufAppendBuf(BounceMB, boundary, 0);
1392 StrBufAppendBufPlain(BounceMB, HKEY("\r\n"), 0);
1393 StrBufAppendBufPlain(BounceMB, HKEY("Content-type: text/plain\r\n\r\n"), 0);
1395 if (give_up) StrBufAppendBufPlain(BounceMB, HKEY(
1396 "A message you sent could not be delivered to some or all of its recipients\n"
1397 "due to prolonged unavailability of its destination(s).\n"
1398 "Giving up on the following addresses:\n\n"
1401 else StrBufAppendBufPlain(BounceMB, HKEY(
1402 "A message you sent could not be delivered to some or all of its recipients.\n"
1403 "The following addresses were undeliverable:\n\n"
1407 * Now go through the instructions checking for stuff.
1409 for (i=0; i<lines; ++i) {
1412 extract_token(buf, instr, i, '\n', sizeof buf);
1413 extract_token(key, buf, 0, '|', sizeof key);
1414 addrlen = extract_token(addr, buf, 1, '|', sizeof addr);
1415 status = extract_int(buf, 2);
1416 dsnlen = extract_token(dsn, buf, 3, '|', sizeof dsn);
1419 CtdlLogPrintf(CTDL_DEBUG, "key=<%s> addr=<%s> status=%d dsn=<%s>\n",
1420 key, addr, status, dsn);
1422 if (!strcasecmp(key, "bounceto")) {
1423 strcpy(bounceto, addr);
1426 if (!strcasecmp(key, "msgid")) {
1427 omsgid = atol(addr);
1430 if (!strcasecmp(key, "remote")) {
1431 if (status == 5) bounce_this = 1;
1432 if (give_up) bounce_this = 1;
1438 StrBufAppendBufPlain(BounceMB, addr, addrlen, 0);
1439 StrBufAppendBufPlain(BounceMB, HKEY(": "), 0);
1440 StrBufAppendBufPlain(BounceMB, dsn, dsnlen, 0);
1441 StrBufAppendBufPlain(BounceMB, HKEY("\r\n"), 0);
1443 remove_token(instr, i, '\n');
1449 /* Attach the original message */
1451 StrBufAppendBufPlain(BounceMB, HKEY("--"), 0);
1452 StrBufAppendBuf(BounceMB, boundary, 0);
1453 StrBufAppendBufPlain(BounceMB, HKEY("\r\n"), 0);
1454 StrBufAppendBufPlain(BounceMB, HKEY("Content-type: message/rfc822\r\n"), 0);
1455 StrBufAppendBufPlain(BounceMB, HKEY("Content-Transfer-Encoding: 7bit\r\n"), 0);
1456 StrBufAppendBufPlain(BounceMB, HKEY("Content-Disposition: inline\r\n"), 0);
1457 StrBufAppendBufPlain(BounceMB, HKEY("\r\n"), 0);
1459 CC->redirect_buffer = NewStrBufPlain(NULL, SIZ);
1460 CtdlOutputMsg(omsgid, MT_RFC822, HEADERS_ALL, 0, 1, NULL, 0);
1461 StrBufAppendBuf(BounceMB, CC->redirect_buffer, 0);
1462 FreeStrBuf(&CC->redirect_buffer);
1465 /* Close the multipart MIME scope */
1466 StrBufAppendBufPlain(BounceMB, HKEY("--"), 0);
1467 StrBufAppendBuf(BounceMB, boundary, 0);
1468 StrBufAppendBufPlain(BounceMB, HKEY("--\r\n"), 0);
1469 bmsg->cm_fields['A'] = SmashStrBuf(&BounceMB);
1470 /* Deliver the bounce if there's anything worth mentioning */
1471 CtdlLogPrintf(CTDL_DEBUG, "num_bounces = %d\n", num_bounces);
1472 if (num_bounces > 0) {
1474 /* First try the user who sent the message */
1475 CtdlLogPrintf(CTDL_DEBUG, "bounce to user? <%s>\n", bounceto);
1476 if (IsEmptyStr(bounceto)) {
1477 CtdlLogPrintf(CTDL_ERR, "No bounce address specified\n");
1478 bounce_msgid = (-1L);
1481 /* Can we deliver the bounce to the original sender? */
1482 valid = validate_recipients(bounceto, smtp_get_Recipients (), 0);
1483 if (valid != NULL) {
1484 if (valid->num_error == 0) {
1485 CtdlSubmitMsg(bmsg, valid, "", QP_EADDR);
1486 successful_bounce = 1;
1490 /* If not, post it in the Aide> room */
1491 if (successful_bounce == 0) {
1492 CtdlSubmitMsg(bmsg, NULL, config.c_aideroom, QP_EADDR);
1495 /* Free up the memory we used */
1496 if (valid != NULL) {
1497 free_recipients(valid);
1500 FreeStrBuf(&boundary);
1501 CtdlFreeMessage(bmsg);
1502 CtdlLogPrintf(CTDL_DEBUG, "Done processing bounces\n");
1507 * smtp_purge_completed_deliveries() is caled by smtp_do_procmsg() to scan a
1508 * set of delivery instructions for completed deliveries and remove them.
1510 * It returns the number of incomplete deliveries remaining.
1512 int smtp_purge_completed_deliveries(char *instr) {
1523 lines = num_tokens(instr, '\n');
1524 for (i=0; i<lines; ++i) {
1525 extract_token(buf, instr, i, '\n', sizeof buf);
1526 extract_token(key, buf, 0, '|', sizeof key);
1527 extract_token(addr, buf, 1, '|', sizeof addr);
1528 status = extract_int(buf, 2);
1529 extract_token(dsn, buf, 3, '|', sizeof dsn);
1533 if (!strcasecmp(key, "remote")) {
1534 if (status == 2) completed = 1;
1539 remove_token(instr, i, '\n');
1552 * Called by smtp_do_queue() to handle an individual message.
1554 void smtp_do_procmsg(long msgnum, void *userdata) {
1555 struct CtdlMessage *msg = NULL;
1557 char *results = NULL;
1565 char envelope_from[1024];
1566 long text_msgid = (-1);
1567 int incomplete_deliveries_remaining;
1568 time_t attempted = 0L;
1569 time_t last_attempted = 0L;
1570 time_t retry = SMTP_RETRY_INTERVAL;
1572 CtdlLogPrintf(CTDL_DEBUG, "SMTP client: smtp_do_procmsg(%ld)\n", msgnum);
1573 strcpy(envelope_from, "");
1575 msg = CtdlFetchMessage(msgnum, 1);
1577 CtdlLogPrintf(CTDL_ERR, "SMTP client: tried %ld but no such message!\n", msgnum);
1581 instr = strdup(msg->cm_fields['M']);
1582 CtdlFreeMessage(msg);
1584 /* Strip out the headers amd any other non-instruction line */
1585 lines = num_tokens(instr, '\n');
1586 for (i=0; i<lines; ++i) {
1587 extract_token(buf, instr, i, '\n', sizeof buf);
1588 if (num_tokens(buf, '|') < 2) {
1589 remove_token(instr, i, '\n');
1595 /* Learn the message ID and find out about recent delivery attempts */
1596 lines = num_tokens(instr, '\n');
1597 for (i=0; i<lines; ++i) {
1598 extract_token(buf, instr, i, '\n', sizeof buf);
1599 extract_token(key, buf, 0, '|', sizeof key);
1600 if (!strcasecmp(key, "msgid")) {
1601 text_msgid = extract_long(buf, 1);
1603 if (!strcasecmp(key, "envelope_from")) {
1604 extract_token(envelope_from, buf, 1, '|', sizeof envelope_from);
1606 if (!strcasecmp(key, "retry")) {
1607 /* double the retry interval after each attempt */
1608 retry = extract_long(buf, 1) * 2L;
1609 if (retry > SMTP_RETRY_MAX) {
1610 retry = SMTP_RETRY_MAX;
1612 remove_token(instr, i, '\n');
1614 if (!strcasecmp(key, "attempted")) {
1615 attempted = extract_long(buf, 1);
1616 if (attempted > last_attempted)
1617 last_attempted = attempted;
1622 * Postpone delivery if we've already tried recently.
1624 if (((time(NULL) - last_attempted) < retry) && (run_queue_now == 0)) {
1625 CtdlLogPrintf(CTDL_DEBUG, "SMTP client: Retry time not yet reached.\n");
1632 * Bail out if there's no actual message associated with this
1634 if (text_msgid < 0L) {
1635 CtdlLogPrintf(CTDL_ERR, "SMTP client: no 'msgid' directive found!\n");
1640 /* Plow through the instructions looking for 'remote' directives and
1641 * a status of 0 (no delivery yet attempted) or 3/4 (transient errors
1642 * were experienced and it's time to try again)
1644 lines = num_tokens(instr, '\n');
1645 for (i=0; i<lines; ++i) {
1646 extract_token(buf, instr, i, '\n', sizeof buf);
1647 extract_token(key, buf, 0, '|', sizeof key);
1648 extract_token(addr, buf, 1, '|', sizeof addr);
1649 status = extract_int(buf, 2);
1650 extract_token(dsn, buf, 3, '|', sizeof dsn);
1651 if ( (!strcasecmp(key, "remote"))
1652 && ((status==0)||(status==3)||(status==4)) ) {
1654 /* Remove this "remote" instruction from the set,
1655 * but replace the set's final newline if
1656 * remove_token() stripped it. It has to be there.
1658 remove_token(instr, i, '\n');
1659 if (instr[strlen(instr)-1] != '\n') {
1660 strcat(instr, "\n");
1665 CtdlLogPrintf(CTDL_DEBUG, "SMTP client: Trying <%s>\n", addr);
1666 smtp_try(key, addr, &status, dsn, sizeof dsn, text_msgid, envelope_from);
1668 if (results == NULL) {
1669 results = malloc(1024);
1670 memset(results, 0, 1024);
1673 results = realloc(results, strlen(results) + 1024);
1675 snprintf(&results[strlen(results)], 1024,
1677 key, addr, status, dsn);
1682 if (results != NULL) {
1683 instr = realloc(instr, strlen(instr) + strlen(results) + 2);
1684 strcat(instr, results);
1689 /* Generate 'bounce' messages */
1690 smtp_do_bounce(instr);
1692 /* Go through the delivery list, deleting completed deliveries */
1693 incomplete_deliveries_remaining =
1694 smtp_purge_completed_deliveries(instr);
1698 * No delivery instructions remain, so delete both the instructions
1699 * message and the message message.
1701 if (incomplete_deliveries_remaining <= 0) {
1703 delmsgs[0] = msgnum;
1704 delmsgs[1] = text_msgid;
1705 CtdlDeleteMessages(SMTP_SPOOLOUT_ROOM, delmsgs, 2, "");
1709 * Uncompleted delivery instructions remain, so delete the old
1710 * instructions and replace with the updated ones.
1712 if (incomplete_deliveries_remaining > 0) {
1713 CtdlDeleteMessages(SMTP_SPOOLOUT_ROOM, &msgnum, 1, "");
1714 msg = malloc(sizeof(struct CtdlMessage));
1715 memset(msg, 0, sizeof(struct CtdlMessage));
1716 msg->cm_magic = CTDLMESSAGE_MAGIC;
1717 msg->cm_anon_type = MES_NORMAL;
1718 msg->cm_format_type = FMT_RFC822;
1719 msg->cm_fields['M'] = malloc(strlen(instr)+SIZ);
1720 snprintf(msg->cm_fields['M'],
1722 "Content-type: %s\n\n%s\n"
1725 SPOOLMIME, instr, (long)time(NULL), (long)retry );
1726 CtdlSubmitMsg(msg, NULL, SMTP_SPOOLOUT_ROOM, QP_EADDR);
1727 CtdlFreeMessage(msg);
1739 * Run through the queue sending out messages.
1741 void *smtp_do_queue(void *arg) {
1742 int num_processed = 0;
1743 struct CitContext smtp_queue_CC;
1745 CtdlFillSystemContext(&smtp_queue_CC, "SMTP Send");
1746 citthread_setspecific(MyConKey, (void *)&smtp_queue_CC );
1747 CtdlLogPrintf(CTDL_INFO, "SMTP client: processing outbound queue\n");
1749 if (CtdlGetRoom(&CC->room, SMTP_SPOOLOUT_ROOM) != 0) {
1750 CtdlLogPrintf(CTDL_ERR, "Cannot find room <%s>\n", SMTP_SPOOLOUT_ROOM);
1753 num_processed = CtdlForEachMessage(MSGS_ALL, 0L, NULL, SPOOLMIME, NULL, smtp_do_procmsg, NULL);
1756 citthread_mutex_unlock (&smtp_send_lock);
1757 CtdlLogPrintf(CTDL_INFO, "SMTP client: queue run completed; %d messages processed\n", num_processed);
1759 CtdlClearSystemContext();
1768 * Create a thread to run the SMTP queue
1770 * This was created as a response to a situation seen on Uncensored where a bad remote was holding
1771 * up SMTP sending for long times.
1772 * Converting to a thread does not fix the problem caused by the bad remote but it does prevent
1773 * the SMTP sending from stopping housekeeping and the EVT_TIMER event system which in turn prevented
1774 * other things from happening.
1776 void smtp_queue_thread (void)
1778 if (citthread_mutex_trylock (&smtp_send_lock)) {
1779 CtdlLogPrintf(CTDL_DEBUG, "SMTP queue run already in progress\n");
1782 CtdlThreadCreate("SMTP Send", CTDLTHREAD_BIGSTACK, smtp_do_queue, NULL);
1788 void smtp_server_going_down (void)
1790 CtdlLogPrintf(CTDL_DEBUG, "SMTP module clean up for shutdown.\n");
1792 citthread_mutex_destroy (&smtp_send_lock);
1797 /*****************************************************************************/
1798 /* SMTP UTILITY COMMANDS */
1799 /*****************************************************************************/
1801 void cmd_smtp(char *argbuf) {
1808 if (CtdlAccessCheck(ac_aide)) return;
1810 extract_token(cmd, argbuf, 0, '|', sizeof cmd);
1812 if (!strcasecmp(cmd, "mx")) {
1813 extract_token(node, argbuf, 1, '|', sizeof node);
1814 num_mxhosts = getmx(buf, node);
1815 cprintf("%d %d MX hosts listed for %s\n",
1816 LISTING_FOLLOWS, num_mxhosts, node);
1817 for (i=0; i<num_mxhosts; ++i) {
1818 extract_token(node, buf, i, '|', sizeof node);
1819 cprintf("%s\n", node);
1825 else if (!strcasecmp(cmd, "runqueue")) {
1827 cprintf("%d All outbound SMTP will be retried now.\n", CIT_OK);
1832 cprintf("%d Invalid command.\n", ERROR + ILLEGAL_VALUE);
1839 * Initialize the SMTP outbound queue
1841 void smtp_init_spoolout(void) {
1842 struct ctdlroom qrbuf;
1845 * Create the room. This will silently fail if the room already
1846 * exists, and that's perfectly ok, because we want it to exist.
1848 CtdlCreateRoom(SMTP_SPOOLOUT_ROOM, 3, "", 0, 1, 0, VIEW_MAILBOX);
1851 * Make sure it's set to be a "system room" so it doesn't show up
1852 * in the <K>nown rooms list for Aides.
1854 if (CtdlGetRoomLock(&qrbuf, SMTP_SPOOLOUT_ROOM) == 0) {
1855 qrbuf.QRflags2 |= QR2_SYSTEM;
1856 CtdlPutRoomLock(&qrbuf);
1863 /*****************************************************************************/
1864 /* MODULE INITIALIZATION STUFF */
1865 /*****************************************************************************/
1867 * This cleanup function blows away the temporary memory used by
1870 void smtp_cleanup_function(void) {
1872 /* Don't do this stuff if this is not an SMTP session! */
1873 if (CC->h_command_function != smtp_command_loop) return;
1875 CtdlLogPrintf(CTDL_DEBUG, "Performing SMTP cleanup hook\n");
1881 const char *CitadelServiceSMTP_MTA="SMTP-MTA";
1882 const char *CitadelServiceSMTPS_MTA="SMTPs-MTA";
1883 const char *CitadelServiceSMTP_MSA="SMTP-MSA";
1884 const char *CitadelServiceSMTP_LMTP="LMTP";
1885 const char *CitadelServiceSMTP_LMTP_UNF="LMTP-UnF";
1887 CTDL_MODULE_INIT(smtp)
1891 CtdlRegisterServiceHook(config.c_smtp_port, /* SMTP MTA */
1896 CitadelServiceSMTP_MTA);
1899 CtdlRegisterServiceHook(config.c_smtps_port,
1904 CitadelServiceSMTPS_MTA);
1907 CtdlRegisterServiceHook(config.c_msa_port, /* SMTP MSA */
1912 CitadelServiceSMTP_MSA);
1914 CtdlRegisterServiceHook(0, /* local LMTP */
1919 CitadelServiceSMTP_LMTP);
1921 CtdlRegisterServiceHook(0, /* local LMTP */
1922 file_lmtp_unfiltered_socket,
1923 lmtp_unfiltered_greeting,
1926 CitadelServiceSMTP_LMTP_UNF);
1928 smtp_init_spoolout();
1929 CtdlRegisterSessionHook(smtp_queue_thread, EVT_TIMER);
1930 CtdlRegisterSessionHook(smtp_cleanup_function, EVT_STOP);
1931 CtdlRegisterProtoHook(cmd_smtp, "SMTP", "SMTP utility commands");
1932 CtdlRegisterCleanupHook (smtp_server_going_down);
1933 citthread_mutex_init (&smtp_send_lock, NULL);
1936 /* return our Subversion id for the Log */