* The VRFY and EXPN commands have been removed from this implementation
* because nobody uses these commands anymore, except for spammers.
*
- * Copyright (c) 1998-2009 by the citadel.org team
+ * Copyright (c) 1998-2017 by the citadel.org team
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 3 of the License, or
- * (at your option) any later version.
+ * This program is open source software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 3.
*
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
*/
#include "sysdep.h"
#include "ctdl_module.h"
#include "smtp_util.h"
+#include "smtpqueue.h"
+#include "smtp_clienthandlers.h"
const char *smtp_get_Recipients(void)
{
if (sSMTP == NULL)
return NULL;
- else return sSMTP->from;
+ else return ChrPtr(sSMTP->from);
+}
+
+
+/*
+ * 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, StrBuf *OMsgTxt)
+{
+ 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;
+ time_t submitted = 0L;
+ struct CtdlMessage *bmsg = NULL;
+ int give_up = 0;
+ 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);
+
+ 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;
+ CM_SetField(bmsg, eAuthor, HKEY("Citadel"));
+ CM_SetField(bmsg, eOriginalRoom, HKEY(MAILROOM));
+ CM_SetField(bmsg, eNodeName, CtdlGetConfigStr("c_nodename"), strlen(CtdlGetConfigStr("c_nodename")));
+ 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 (give_up)
+ {
+ 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
+ {
+ 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;
+
+ 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 (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);
+
+ if (OMsgTxt == NULL) {
+ 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);
+ }
+ else {
+ StrBufAppendBuf(BounceMB, OMsgTxt, 0);
+ }
+ }
+
+ /* 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, "", QP_EADDR);
+ successful_bounce = 1;
+ }
+ }
+
+ /* If not, post it in the Aide> room */
+ if (successful_bounce == 0) {
+ CtdlSubmitMsg(bmsg, NULL, CtdlGetConfigStr("c_aideroom"), QP_EADDR);
+ }
+
+ /* Free up the memory we used */
+ if (valid != NULL) {
+ free_recipients(valid);
+ }
+ }
+ FreeStrBuf(&boundary);
+ CM_Free(bmsg);
+ syslog(LOG_DEBUG, "Done processing bounces");
}
projects / citadel.git / blobdiff