+ else return ChrPtr(sSMTP->from);
+}
+
+
+/*
+ * smtp_do_bounce() is caled by smtp_process_one_msg() to scan a set of delivery
+ * instructions for errors and produce/deliver a "bounce" message (delivery
+ * status notification).
+ *
+ * is_final should be set to:
+ * SDB_BOUNCE_FATALS Advise the sender of all 5XX (permanent failures)
+ * SDB_BOUNCE_ALL Advise the sender that all deliveries have failed and will not be retried
+ * SDB_WARN Warn the sender about all 4XX transient delays
+ */
+void smtp_do_bounce(const char *instr, int is_final)
+{
+ 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;
+ struct CtdlMessage *bmsg = NULL;
+ recptypes *valid;
+ int successful_bounce = 0;
+ static int seq = 0;
+ StrBuf *BounceMB;
+ long omsgid = (-1);
+
+ syslog(LOG_DEBUG, "smtp_do_bounce() called");
+ strcpy(bounceto, "");
+ boundary = NewStrBufPlain(HKEY("=_Citadel_Multipart_"));
+
+ StrBufAppendPrintf(boundary, "%s_%04x%04x", CtdlGetConfigStr("c_fqdn"), getpid(), ++seq);
+
+
+ /* 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;
+ CM_SetField(bmsg, eAuthor, HKEY("Citadel"));
+ CM_SetField(bmsg, eOriginalRoom, HKEY(MAILROOM));
+ CM_SetField(bmsg, eMsgSubject, HKEY("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 (is_final == SDB_BOUNCE_ALL)
+ {
+ StrBufAppendBufPlain(
+ BounceMB,
+ HKEY( "A message you sent could not be delivered "
+ "to some or all of its recipients\ndue to "
+ "prolonged unavailability of its destination(s).\n"
+ "Giving up on the following addresses:\n\n"),
+ 0);
+ }
+ else if (is_final == SDB_BOUNCE_FATALS)
+ {
+ 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);
+ }
+ else if (is_final == SDB_WARN)
+ {
+ StrBufAppendBufPlain(
+ BounceMB,
+ HKEY("A message you sent has not been delivered "
+ "to some or all of its recipients.\n"
+ "Citadel will continue attempting delivery for five days.\n"
+ "The following addresses were undeliverable:\n\n"),
+ 0);
+ }
+ else // should never get here
+ {
+ StrBufAppendBufPlain(BounceMB, HKEY("This message should never occur.\n\n"), 0);
+ }
+
+ /*
+ * Now go through the instructions checking for stuff.
+ */
+ lines = num_tokens(instr, '\n');
+ 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;
+
+ syslog(LOG_DEBUG, "key=<%s> addr=<%s> status=%d dsn=<%s>", key, addr, status, dsn);
+
+ if (!strcasecmp(key, "bounceto")) {
+ strcpy(bounceto, addr);
+ }
+
+ if (!strcasecmp(key, "msgid")) {
+ omsgid = atol(addr);
+ }
+
+ if (!strcasecmp(key, "remote")) {
+ if ((is_final == SDB_BOUNCE_FATALS) && (status == 5)) bounce_this = 1;
+ if ((is_final == SDB_BOUNCE_ALL) && (status != 2)) bounce_this = 1;
+ if ((is_final == SDB_WARN) && (status == 4)) 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);
+ }
+ }
+
+ /* 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,
+ NULL, NULL, NULL
+ );
+ 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);
+ CM_SetAsFieldSB(bmsg, eMesageText, &BounceMB);
+
+ /* Deliver the bounce if there's anything worth mentioning */
+ syslog(LOG_DEBUG, "num_bounces = %d", num_bounces);
+ if (num_bounces > 0) {
+
+ /* First try the user who sent the message */
+ if (IsEmptyStr(bounceto)) {
+ syslog(LOG_ERR, "No bounce address specified");
+ }
+ else {
+ syslog(LOG_DEBUG, "bounce to user <%s>", bounceto);
+ }
+ /* 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, "");
+ successful_bounce = 1;
+ }
+ }
+
+ /* If not, post it in the Aide> room */
+ if (successful_bounce == 0) {
+ CtdlSubmitMsg(bmsg, NULL, CtdlGetConfigStr("c_aideroom"));
+ }
+
+ /* Free up the memory we used */
+ if (valid != NULL) {
+ free_recipients(valid);
+ }
+ }
+ FreeStrBuf(&boundary);
+ CM_Free(bmsg);
+ syslog(LOG_DEBUG, "Done processing bounces");