--- /dev/null
+// This module delivers messages to mailing lists.
+//
+// Copyright (c) 2002-2022 by the citadel.org team
+//
+// 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.
+
+#include "../../sysdep.h"
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <ctype.h>
+#include <signal.h>
+#include <pwd.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <time.h>
+#include <sys/wait.h>
+#include <string.h>
+#include <limits.h>
+#include <libcitadel.h>
+#include "../../citadel.h"
+#include "../../server.h"
+#include "../../citserver.h"
+#include "../../support.h"
+#include "../../config.h"
+#include "../../user_ops.h"
+#include "../../database.h"
+#include "../../msgbase.h"
+#include "../../internet_addressing.h"
+#include "../../clientsocket.h"
+#include "../../ctdl_module.h"
+
+int doing_listdeliver = 0;
+
+
+// data passed back and forth between listdeliver_do_msg() and listdeliver_sweep_room()
+struct lddata {
+ long msgnum; // number of most recent message processed
+ char *netconf; // netconfig for this room (contains the recipients)
+};
+
+
+
+void listdeliver_do_msg(long msgnum, void *userdata) {
+ struct lddata *ld = (struct lddata *) userdata;
+ if (!ld) return;
+ char buf[SIZ];
+ char *ch;
+ char bounce_to[256];
+ int i = 0;
+
+ ld->msgnum = msgnum;
+ if (msgnum <= 0) return;
+
+ struct CtdlMessage *TheMessage = CtdlFetchMessage(msgnum, 1);
+ if (!TheMessage) return;
+
+ // If the subject line does not contain the name of the room, add it now.
+ if (!bmstrcasestr(TheMessage->cm_fields[eMsgSubject], CC->room.QRname)) {
+ snprintf(buf, sizeof buf, "[%s] %s", CC->room.QRname, TheMessage->cm_fields[eMsgSubject]);
+ CM_SetField(TheMessage, eMsgSubject, buf, strlen(buf));
+ }
+
+ // From: should be set to the list address because doing otherwise makes DKIM parsers angry.
+ // Reply-to: should be set to the list address so that replies come to the list.
+ snprintf(buf, sizeof buf, "room_%s@%s", CC->room.QRname, CtdlGetConfigStr("c_fqdn"));
+ for (ch=buf; *ch; ++ch) {
+ if (isspace(*ch)) *ch = '_';
+ }
+ CM_SetField(TheMessage, erFc822Addr, buf, strlen(buf));
+ CM_SetField(TheMessage, eReplyTo, buf, strlen(buf));
+
+ // With that out of the way, let's figure out who this message needs to be sent to.
+ char *recipients = malloc(strlen(ld->netconf));
+ if (recipients) {
+ recipients[0] = 0;
+
+ int config_lines = num_tokens(ld->netconf, '\n');
+ for (i=0; i<config_lines; ++i) {
+ extract_token(buf, ld->netconf, i, '\n', sizeof buf);
+ if (!strncasecmp(buf, "listrecp|", 9)) {
+ if (recipients[0] != 0) {
+ strcat(recipients, ",");
+ }
+ strcat(recipients, &buf[9]);
+ }
+ if (!strncasecmp(buf, "digestrecp|", 11)) {
+ if (recipients[0] != 0) {
+ strcat(recipients, ",");
+ }
+ strcat(recipients, &buf[11]);
+ }
+ }
+
+ // Where do we want bounces and other noise to be sent? Certainly not to the list members!
+ snprintf(bounce_to, sizeof bounce_to, "room_aide@%s", CtdlGetConfigStr("c_fqdn"));
+
+ // Now submit the message
+ struct recptypes *valid = validate_recipients(recipients, NULL, 0);
+ if (valid) {
+ valid->bounce_to = strdup(bounce_to);
+ valid->envelope_from = strdup(bounce_to);
+ valid->sending_room = strdup(CC->room.QRname);
+ CtdlSubmitMsg(TheMessage, valid, "");
+ free_recipients(valid);
+ }
+ }
+ CM_Free(TheMessage);
+}
+
+
+// Sweep through one room looking for mailing list deliveries to do
+void listdeliver_sweep_room(char *roomname) {
+ char *netconfig = NULL;
+ char *newnetconfig = NULL;
+ long lastsent = 0;
+ char buf[SIZ];
+ int config_lines;
+ int i;
+ int number_of_messages_processed = 0;
+ int number_of_recipients = 0;
+ struct lddata ld;
+
+ if (CtdlGetRoom(&CC->room, roomname)) {
+ syslog(LOG_DEBUG, "listdeliver: no room <%s>", roomname);
+ return;
+ }
+
+ netconfig = LoadRoomNetConfigFile(CC->room.QRnumber);
+ if (!netconfig) {
+ return; // no netconfig, no processing, no problem
+ }
+
+ config_lines = num_tokens(netconfig, '\n');
+ for (i=0; i<config_lines; ++i) {
+ extract_token(buf, netconfig, i, '\n', sizeof buf);
+
+ if (!strncasecmp(buf, "lastsent|", 9)) {
+ lastsent = atol(&buf[9]);
+ }
+ else if ( (!strncasecmp(buf, "listrecp|", 9)) || (!strncasecmp(buf, "digestrecp|", 11)) ) {
+ ++number_of_recipients;
+ }
+ }
+
+ if (number_of_recipients > 0) {
+ syslog(LOG_DEBUG, "listdeliver: processing new messages in <%s> for <%d> recipients", CC->room.QRname, number_of_recipients);
+ ld.netconf = netconfig;
+ number_of_messages_processed = CtdlForEachMessage(MSGS_GT, lastsent, NULL, NULL, NULL, listdeliver_do_msg, &ld);
+ syslog(LOG_INFO, "listdeliver: processed <%d> messages in <%s> for <%d> recipients", number_of_messages_processed, CC->room.QRname, number_of_recipients);
+
+ if (number_of_messages_processed > 0) {
+ syslog(LOG_DEBUG, "listdeliver: new lastsent is %ld", ld.msgnum);
+
+ // Update this room's netconfig with the updated lastsent
+ begin_critical_section(S_NETCONFIGS);
+ netconfig = LoadRoomNetConfigFile(CC->room.QRnumber);
+ if (!netconfig) {
+ netconfig = strdup("");
+ }
+
+ // The new netconfig begins with the new lastsent directive
+ newnetconfig = malloc(strlen(netconfig) + 1024);
+ sprintf(newnetconfig, "lastsent|%ld\n", ld.msgnum);
+
+ // And then we append all of the old netconfig, minus the old lastsent. Also omit blank lines.
+ config_lines = num_tokens(netconfig, '\n');
+ for (i=0; i<config_lines; ++i) {
+ extract_token(buf, netconfig, i, '\n', sizeof buf);
+ if ( (!IsEmptyStr(buf)) && (strncasecmp(buf, "lastsent|", 9)) ) {
+ sprintf(&newnetconfig[strlen(newnetconfig)], "%s\n", buf);
+ }
+ }
+
+ // Write the new netconfig back to disk
+ SaveRoomNetConfigFile(CC->room.QRnumber, newnetconfig);
+ end_critical_section(S_NETCONFIGS);
+ free(newnetconfig); // this was the new netconfig, free it because we're done with it
+ }
+ }
+ free(netconfig); // this was the old netconfig, free it even if we didn't do anything
+}
+
+
+// Callback for listdeliver_sweep()
+// Adds one room to the queue
+void listdeliver_queue_room(struct ctdlroom *qrbuf, void *data) {
+ Array *roomlistarr = (Array *)data;
+ array_append(roomlistarr, qrbuf->QRname);
+}
+
+
+// Queue up the list of rooms so we can sweep them for mailing list delivery instructions
+void listdeliver_sweep(void) {
+ static time_t last_run = 0L;
+ int i = 0;
+ time_t now = time(NULL);
+
+ // Run mailing list delivery no more frequently than once every 15 minutes (we should make this configurable)
+ if ( (now - last_run) < 900 ) {
+ syslog(LOG_DEBUG,
+ "listdeliver: delivery interval not yet reached; last run was %ldm%lds ago",
+ ((now - last_run) / 60),
+ ((now - last_run) % 60)
+ );
+ return;
+ }
+
+ // This is a simple concurrency check to make sure only one listdeliver
+ // run is done at a time. We could do this with a mutex, but since we
+ // don't really require extremely fine granularity here, we'll do it
+ // with a static variable instead.
+ if (doing_listdeliver) return;
+ doing_listdeliver = 1;
+
+ // Go through each room looking for mailing lists to process
+ syslog(LOG_DEBUG, "listdeliver: sweep started");
+
+ Array *roomlistarr = array_new(ROOMNAMELEN); // we have to queue them
+ CtdlForEachRoom(listdeliver_queue_room, roomlistarr); // otherwise we get multiple cursors in progress
+
+ for (i=0; i<array_len(roomlistarr); ++i) {
+ listdeliver_sweep_room((char *)array_get_element_at(roomlistarr, i));
+ }
+
+ array_free(roomlistarr);
+ syslog(LOG_DEBUG, "listdeliver: ended");
+ last_run = time(NULL);
+ doing_listdeliver = 0;
+}
+
+
+// Module entry point
+char *ctdl_module_init_listdeliver(void) {
+ if (!threading) {
+ CtdlRegisterSessionHook(listdeliver_sweep, EVT_TIMER, PRIO_AGGR + 50);
+ }
+
+ // return our module name for the log
+ return "listsub";
+}