- strcpy (mx_host, buf);
- endpart = strrchr(mx_host, ':');
- if (endpart != 0){
- *endpart = '\0';
- strcpy(mx_port, endpart + 1);
- }
- else {
- strcpy(mx_port, "25");
- }
- CtdlLogPrintf(CTDL_DEBUG, "SMTP client: connecting to %s : %s ...\n", mx_host, mx_port);
- sock = sock_connect(mx_host, mx_port);
- snprintf(dsn, SIZ, "Could not connect: %s", strerror(errno));
- if (sock >= 0)
- {
- CtdlLogPrintf(CTDL_DEBUG, "SMTP client: connected!\n");
- int fdflags;
- fdflags = fcntl(sock, F_GETFL);
- if (fdflags < 0)
- CtdlLogPrintf(CTDL_DEBUG,
- "unable to get SMTP-Client socket flags! %s \n",
- strerror(errno));
- fdflags = fdflags | O_NONBLOCK;
- if (fcntl(sock, F_SETFL, fdflags) < 0)
- CtdlLogPrintf(CTDL_DEBUG,
- "unable to set SMTP-Client socket nonblocking flags! %s \n",
- strerror(errno));
- }
- if (sock < 0) {
- if (errno > 0) {
- snprintf(dsn, SIZ, "%s", strerror(errno));
- }
- else {
- snprintf(dsn, SIZ, "Unable to connect to %s : %s\n", mx_host, mx_port);
- }
- }
- }
-
- if (sock < 0) {
- *status = 4; /* dsn is already filled in */
- return;
- }
-
- CCC->sReadBuf = NewStrBuf();
- CCC->sMigrateBuf = NewStrBuf();
- CCC->sPos = NULL;
-
- /* Process the SMTP greeting from the server */
- if (ml_sock_gets(&sock, buf, 90) < 0) {
- *status = 4;
- strcpy(dsn, "Connection broken during SMTP conversation");
- goto bail;
- }
- CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
- if (buf[0] != '2') {
- if (buf[0] == '4') {
- *status = 4;
- safestrncpy(dsn, &buf[4], 1023);
- goto bail;
- }
- else {
- *status = 5;
- safestrncpy(dsn, &buf[4], 1023);
- goto bail;
- }
- }
-
- /* At this point we know we are talking to a real SMTP server */
-
- /* Do a EHLO command. If it fails, try the HELO command. */
- snprintf(buf, sizeof buf, "EHLO %s\r\n", config.c_fqdn);
- CtdlLogPrintf(CTDL_DEBUG, ">%s", buf);
- sock_write(&sock, buf, strlen(buf));
- if (ml_sock_gets(&sock, buf, 30) < 0) {
- *status = 4;
- strcpy(dsn, "Connection broken during SMTP HELO");
- goto bail;
- }
- CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
- if (buf[0] != '2') {
- snprintf(buf, sizeof buf, "HELO %s\r\n", config.c_fqdn);
- CtdlLogPrintf(CTDL_DEBUG, ">%s", buf);
- sock_write(&sock, buf, strlen(buf));
- if (ml_sock_gets(&sock, buf, 30) < 0) {
- *status = 4;
- strcpy(dsn, "Connection broken during SMTP HELO");
- goto bail;
- }
- }
- if (buf[0] != '2') {
- if (buf[0] == '4') {
- *status = 4;
- safestrncpy(dsn, &buf[4], 1023);
- goto bail;
- }
- else {
- *status = 5;
- safestrncpy(dsn, &buf[4], 1023);
- goto bail;
- }
- }
-
- /* Do an AUTH command if necessary */
- if (!IsEmptyStr(mx_user)) {
- char encoded[1024];
- sprintf(buf, "%s%c%s%c%s", mx_user, '\0', mx_user, '\0', mx_pass);
- CtdlEncodeBase64(encoded, buf, strlen(mx_user) + strlen(mx_user) + strlen(mx_pass) + 2, 0);
- snprintf(buf, sizeof buf, "AUTH PLAIN %s\r\n", encoded);
- CtdlLogPrintf(CTDL_DEBUG, ">%s", buf);
- sock_write(&sock, buf, strlen(buf));
- if (ml_sock_gets(&sock, buf, 30) < 0) {
- *status = 4;
- strcpy(dsn, "Connection broken during SMTP AUTH");
- goto bail;
- }
- CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
- if (buf[0] != '2') {
- if (buf[0] == '4') {
- *status = 4;
- safestrncpy(dsn, &buf[4], 1023);
- goto bail;
- }
- else {
- *status = 5;
- safestrncpy(dsn, &buf[4], 1023);
- goto bail;
- }
- }
- }
-
- /* previous command succeeded, now try the MAIL FROM: command */
- snprintf(buf, sizeof buf, "MAIL FROM:<%s>\r\n", envelope_from);
- CtdlLogPrintf(CTDL_DEBUG, ">%s", buf);
- sock_write(&sock, buf, strlen(buf));
- if (ml_sock_gets(&sock, buf, 30) < 0) {
- *status = 4;
- strcpy(dsn, "Connection broken during SMTP MAIL");
- goto bail;
- }
- CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
- if (buf[0] != '2') {
- if (buf[0] == '4') {
- *status = 4;
- safestrncpy(dsn, &buf[4], 1023);
- goto bail;
- }
- else {
- *status = 5;
- safestrncpy(dsn, &buf[4], 1023);
- goto bail;
- }
- }
-
- /* MAIL succeeded, now try the RCPT To: command */
- snprintf(buf, sizeof buf, "RCPT TO:<%s@%s>\r\n", user, node);
- CtdlLogPrintf(CTDL_DEBUG, ">%s", buf);
- sock_write(&sock, buf, strlen(buf));
- if (ml_sock_gets(&sock, buf, 30) < 0) {
- *status = 4;
- strcpy(dsn, "Connection broken during SMTP RCPT");
- goto bail;
- }
- CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
- if (buf[0] != '2') {
- if (buf[0] == '4') {
- *status = 4;
- safestrncpy(dsn, &buf[4], 1023);
- goto bail;
- }
- else {
- *status = 5;
- safestrncpy(dsn, &buf[4], 1023);
- goto bail;
- }
- }
-
- /* RCPT succeeded, now try the DATA command */
- CtdlLogPrintf(CTDL_DEBUG, ">DATA\n");
- sock_write(&sock, "DATA\r\n", 6);
- if (ml_sock_gets(&sock, buf, 30) < 0) {
- *status = 4;
- strcpy(dsn, "Connection broken during SMTP DATA");
- goto bail;
- }
- CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
- if (buf[0] != '3') {
- if (buf[0] == '4') {
- *status = 3;
- safestrncpy(dsn, &buf[4], 1023);
- goto bail;
- }
- else {
- *status = 5;
- safestrncpy(dsn, &buf[4], 1023);
- goto bail;
- }
- }
-
- /* If we reach this point, the server is expecting data.*/
- sock_write_timeout(&sock,
- msgtext,
- msg_size,
- (msg_size / 128) + 50);
- if (msgtext[msg_size-1] != 10) {
- CtdlLogPrintf(CTDL_WARNING, "Possible problem: message did not "
- "correctly terminate. (expecting 0x10, got 0x%02x)\n",
- buf[msg_size-1]);
- sock_write(&sock, "\r\n", 2);
- }
-
- sock_write(&sock, ".\r\n", 3);
- tcdrain(sock);
- if (ml_sock_gets(&sock, buf, 90) < 0) {
- *status = 4;
- strcpy(dsn, "Connection broken during SMTP message transmit");
- goto bail;
- }
- CtdlLogPrintf(CTDL_DEBUG, "%s\n", buf);
- if (buf[0] != '2') {
- if (buf[0] == '4') {
- *status = 4;
- safestrncpy(dsn, &buf[4], 1023);
- goto bail;
- }
- else {
- *status = 5;
- safestrncpy(dsn, &buf[4], 1023);
- goto bail;
- }
- }
-
- /* We did it! */
- safestrncpy(dsn, &buf[4], 1023);
- *status = 2;
-
- CtdlLogPrintf(CTDL_DEBUG, ">QUIT\n");
- sock_write(&sock, "QUIT\r\n", 6);
- ml_sock_gets(&sock, buf, 30);
- CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
- CtdlLogPrintf(CTDL_INFO, "SMTP client: delivery to <%s> @ <%s> (%s) succeeded\n",
- user, node, name);
-
-bail: free(msgtext);
- FreeStrBuf(&CCC->sReadBuf);
- FreeStrBuf(&CCC->sMigrateBuf);
- if (sock != -1)
- sock_close(sock);
-
- /* Write something to the syslog (which may or may not be where the
- * rest of the Citadel logs are going; some sysadmins want LOG_MAIL).
- */
- if (enable_syslog) {
- syslog((LOG_MAIL | LOG_INFO),
- "%ld: to=<%s>, relay=%s, stat=%s",
- msgnum,
- addr,
- mx_host,
- dsn
- );
- }
-
- return;
-}
-
-
-
-/*
- * smtp_do_bounce() is caled by smtp_do_procmsg() to scan a set of delivery
- * instructions for "5" codes (permanent fatal errors) and produce/deliver
- * a "bounce" message (delivery status notification).
- */
-void smtp_do_bounce(char *instr) {
- int i;
- int lines;
- int status;
- char buf[1024];
- char key[1024];
- char addr[1024];
- char dsn[1024];
- char bounceto[1024];
- StrBuf *boundary;
- int num_bounces = 0;
- int bounce_this = 0;
- long bounce_msgid = (-1);
- time_t submitted = 0L;
- struct CtdlMessage *bmsg = NULL;
- int give_up = 0;
- struct recptypes *valid;
- int successful_bounce = 0;
- static int seq = 0;
- StrBuf *BounceMB;
- long omsgid = (-1);
-
- CtdlLogPrintf(CTDL_DEBUG, "smtp_do_bounce() called\n");
- strcpy(bounceto, "");
- boundary = NewStrBufPlain(HKEY("=_Citadel_Multipart_"));
- StrBufAppendPrintf(boundary, "%s_%04x%04x", config.c_fqdn, getpid(), ++seq);
- lines = num_tokens(instr, '\n');
-
- /* See if it's time to give up on delivery of this message */
- for (i=0; i<lines; ++i) {
- extract_token(buf, instr, i, '\n', sizeof buf);
- extract_token(key, buf, 0, '|', sizeof key);
- extract_token(addr, buf, 1, '|', sizeof addr);
- if (!strcasecmp(key, "submitted")) {
- submitted = atol(addr);
- }
- }
-
- if ( (time(NULL) - submitted) > SMTP_GIVE_UP ) {
- give_up = 1;
- }
-
- /* Start building our bounce message */
-
- bmsg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
- if (bmsg == NULL) return;
- memset(bmsg, 0, sizeof(struct CtdlMessage));
- BounceMB = NewStrBufPlain(NULL, 1024);
-
- bmsg->cm_magic = CTDLMESSAGE_MAGIC;
- bmsg->cm_anon_type = MES_NORMAL;
- bmsg->cm_format_type = FMT_RFC822;
- bmsg->cm_fields['A'] = strdup("Citadel");
- bmsg->cm_fields['O'] = strdup(MAILROOM);
- bmsg->cm_fields['N'] = strdup(config.c_nodename);
- bmsg->cm_fields['U'] = strdup("Delivery Status Notification (Failure)");
- StrBufAppendBufPlain(BounceMB, HKEY("Content-type: multipart/mixed; boundary=\""), 0);
- StrBufAppendBuf(BounceMB, boundary, 0);
- StrBufAppendBufPlain(BounceMB, HKEY("\"\r\n"), 0);
- StrBufAppendBufPlain(BounceMB, HKEY("MIME-Version: 1.0\r\n"), 0);
- StrBufAppendBufPlain(BounceMB, HKEY("X-Mailer: " CITADEL "\r\n"), 0);
- StrBufAppendBufPlain(BounceMB, HKEY("\r\nThis is a multipart message in MIME format.\r\n\r\n"), 0);
- StrBufAppendBufPlain(BounceMB, HKEY("--"), 0);
- StrBufAppendBuf(BounceMB, boundary, 0);
- StrBufAppendBufPlain(BounceMB, HKEY("\r\n"), 0);
- StrBufAppendBufPlain(BounceMB, HKEY("Content-type: text/plain\r\n\r\n"), 0);
-
- if (give_up) StrBufAppendBufPlain(BounceMB, HKEY(
-"A message you sent could not be delivered to some or all of its recipients\n"
-"due to prolonged unavailability of its destination(s).\n"
-"Giving up on the following addresses:\n\n"
- ), 0);
-
- else StrBufAppendBufPlain(BounceMB, HKEY(
-"A message you sent could not be delivered to some or all of its recipients.\n"
-"The following addresses were undeliverable:\n\n"
- ), 0);
-
- /*
- * Now go through the instructions checking for stuff.
- */
- for (i=0; i<lines; ++i) {
- long addrlen;
- long dsnlen;
- extract_token(buf, instr, i, '\n', sizeof buf);
- extract_token(key, buf, 0, '|', sizeof key);
- addrlen = extract_token(addr, buf, 1, '|', sizeof addr);
- status = extract_int(buf, 2);
- dsnlen = extract_token(dsn, buf, 3, '|', sizeof dsn);
- bounce_this = 0;
-
- CtdlLogPrintf(CTDL_DEBUG, "key=<%s> addr=<%s> status=%d dsn=<%s>\n",
- key, addr, status, dsn);
-
- if (!strcasecmp(key, "bounceto")) {
- strcpy(bounceto, addr);
- }
-
- if (!strcasecmp(key, "msgid")) {
- omsgid = atol(addr);
- }
-
- if (!strcasecmp(key, "remote")) {
- if (status == 5) bounce_this = 1;
- if (give_up) bounce_this = 1;
- }
-
- if (bounce_this) {
- ++num_bounces;
-
- StrBufAppendBufPlain(BounceMB, addr, addrlen, 0);
- StrBufAppendBufPlain(BounceMB, HKEY(": "), 0);
- StrBufAppendBufPlain(BounceMB, dsn, dsnlen, 0);
- StrBufAppendBufPlain(BounceMB, HKEY("\r\n"), 0);
-
- remove_token(instr, i, '\n');
- --i;
- --lines;
- }
- }
-
- /* Attach the original message */
- if (omsgid >= 0) {
- StrBufAppendBufPlain(BounceMB, HKEY("--"), 0);
- StrBufAppendBuf(BounceMB, boundary, 0);
- StrBufAppendBufPlain(BounceMB, HKEY("\r\n"), 0);
- StrBufAppendBufPlain(BounceMB, HKEY("Content-type: message/rfc822\r\n"), 0);
- StrBufAppendBufPlain(BounceMB, HKEY("Content-Transfer-Encoding: 7bit\r\n"), 0);
- StrBufAppendBufPlain(BounceMB, HKEY("Content-Disposition: inline\r\n"), 0);
- StrBufAppendBufPlain(BounceMB, HKEY("\r\n"), 0);
-
- CC->redirect_buffer = NewStrBufPlain(NULL, SIZ);
- CtdlOutputMsg(omsgid, MT_RFC822, HEADERS_ALL, 0, 1, NULL, 0);
- StrBufAppendBuf(BounceMB, CC->redirect_buffer, 0);
- FreeStrBuf(&CC->redirect_buffer);
- }
-
- /* Close the multipart MIME scope */
- StrBufAppendBufPlain(BounceMB, HKEY("--"), 0);
- StrBufAppendBuf(BounceMB, boundary, 0);
- StrBufAppendBufPlain(BounceMB, HKEY("--\r\n"), 0);
- if (bmsg->cm_fields['A'] != NULL)
- free(bmsg->cm_fields['A']);
- bmsg->cm_fields['A'] = SmashStrBuf(&BounceMB);
- /* Deliver the bounce if there's anything worth mentioning */
- CtdlLogPrintf(CTDL_DEBUG, "num_bounces = %d\n", num_bounces);
- if (num_bounces > 0) {
-
- /* First try the user who sent the message */
- CtdlLogPrintf(CTDL_DEBUG, "bounce to user? <%s>\n", bounceto);
- if (IsEmptyStr(bounceto)) {
- CtdlLogPrintf(CTDL_ERR, "No bounce address specified\n");
- bounce_msgid = (-1L);
- }
-
- /* Can we deliver the bounce to the original sender? */
- valid = validate_recipients(bounceto, smtp_get_Recipients (), 0);
- if (valid != NULL) {
- if (valid->num_error == 0) {
- CtdlSubmitMsg(bmsg, valid, "", QP_EADDR);
- successful_bounce = 1;
- }
- }
-
- /* If not, post it in the Aide> room */
- if (successful_bounce == 0) {
- CtdlSubmitMsg(bmsg, NULL, config.c_aideroom, QP_EADDR);
- }
-
- /* Free up the memory we used */
- if (valid != NULL) {
- free_recipients(valid);
- }
- }
- FreeStrBuf(&boundary);
- CtdlFreeMessage(bmsg);
- CtdlLogPrintf(CTDL_DEBUG, "Done processing bounces\n");
-}
-
-
-/*
- * smtp_purge_completed_deliveries() is caled by smtp_do_procmsg() to scan a
- * set of delivery instructions for completed deliveries and remove them.
- *
- * It returns the number of incomplete deliveries remaining.
- */
-int smtp_purge_completed_deliveries(char *instr) {
- int i;
- int lines;
- int status;
- char buf[1024];
- char key[1024];
- char addr[1024];
- char dsn[1024];
- int completed;
- int incomplete = 0;
-
- lines = num_tokens(instr, '\n');
- for (i=0; i<lines; ++i) {
- extract_token(buf, instr, i, '\n', sizeof buf);
- extract_token(key, buf, 0, '|', sizeof key);
- extract_token(addr, buf, 1, '|', sizeof addr);
- status = extract_int(buf, 2);
- extract_token(dsn, buf, 3, '|', sizeof dsn);
-
- completed = 0;
-
- if (!strcasecmp(key, "remote")) {
- if (status == 2) completed = 1;
- else ++incomplete;
- }
-
- if (completed) {
- remove_token(instr, i, '\n');
- --i;
- --lines;
- }
- }
-
- return(incomplete);
-}
-
-
-/*
- * smtp_do_procmsg()
- *
- * Called by smtp_do_queue() to handle an individual message.
- */
-void smtp_do_procmsg(long msgnum, void *userdata) {
- struct CtdlMessage *msg = NULL;
- char *instr = NULL;
- char *results = NULL;
- int i;
- int lines;
- int status;
- char buf[1024];
- char key[1024];
- char addr[1024];
- char dsn[1024];
- char envelope_from[1024];
- long text_msgid = (-1);
- int incomplete_deliveries_remaining;
- time_t attempted = 0L;
- time_t last_attempted = 0L;
- time_t retry = SMTP_RETRY_INTERVAL;
-
- CtdlLogPrintf(CTDL_DEBUG, "SMTP client: smtp_do_procmsg(%ld)\n", msgnum);
- strcpy(envelope_from, "");
-
- msg = CtdlFetchMessage(msgnum, 1);
- if (msg == NULL) {
- CtdlLogPrintf(CTDL_ERR, "SMTP client: tried %ld but no such message!\n", msgnum);