citadel/server/modules/smtp/serv_smtpclient.c

   1 // Transmit outbound SMTP mail to the big wide world of the Internet
   2 //
   3 // This is the new, exciting, clever version that makes libcurl do all the work  :)
   4 //
   5 // Copyright (c) 1997-2023 by the citadel.org team
   6 //
   7 // This program is open source software.  Use, duplication, or disclosure
   8 // is subject to the terms of the GNU General Public License, version 3.
   9
  10 #include <stdlib.h>
  11 #include <unistd.h>
  12 #include <stdio.h>
  13 #include <time.h>
  14 #include <ctype.h>
  15 #include <string.h>
  16 #include <errno.h>
  17 #include <sys/types.h>
  18 #include <sys/stat.h>
  19 #include <libcitadel.h>
  20 #include <curl/curl.h>
  21 #include "../../sysconfig.h"
  22 #include "../../citadel.h"
  23 #include "../../server.h"
  24 #include "../../citserver.h"
  25 #include "../../support.h"
  26 #include "../../config.h"
  27 #include "../../ctdl_module.h"
  28 #include "../../clientsocket.h"
  29 #include "../../msgbase.h"
  30 #include "../../domain.h"
  31 #include "../../internet_addressing.h"
  32 #include "../../citadel_dirs.h"
  33 #include "../smtp/smtp_util.h"
  34
  35 long last_queue_job_submitted = 0;
  36 long last_queue_job_processed = 0;
  37
  38 struct smtpmsgsrc {             // Data passed in and out of libcurl for message upload
  39         StrBuf *TheMessage;
  40         int bytes_total;
  41         int bytes_sent;
  42 };
  43
  44 // Initialize the SMTP outbound queue
  45 void smtp_init_spoolout(void) {
  46         struct ctdlroom qrbuf;
  47
  48         // Create the room.  This will silently fail if the room already
  49         // exists, and that's perfectly ok, because we want it to exist.
  50         CtdlCreateRoom(SMTP_SPOOLOUT_ROOM, 3, "", 0, 1, 0, VIEW_QUEUE);
  51
  52         // Make sure it's set to be a "system room" so it doesn't show up
  53         // in the <K>nown rooms list for administrators.
  54         if (CtdlGetRoomLock(&qrbuf, SMTP_SPOOLOUT_ROOM) == 0) {
  55                 qrbuf.QRflags2 |= QR2_SYSTEM;
  56                 CtdlPutRoomLock(&qrbuf);
  57         }
  58 }
  59
  60
  61 // For internet mail, generate a delivery job.
  62 // Yes, this is recursive.  Deal with it.  Infinite recursion does
  63 // not happen because the message containing the delivery job does not
  64 // have a recipient.
  65 int smtp_aftersave(struct CtdlMessage *msg, struct recptypes *recps) {
  66         if ((recps != NULL) && (recps->num_internet > 0)) {
  67                 struct CtdlMessage *imsg = NULL;
  68                 char recipient[SIZ];
  69                 StrBuf *SpoolMsg = NewStrBuf();
  70                 long nTokens;
  71                 int i;
  72
  73                 syslog(LOG_DEBUG, "smtpclient: generating delivery job");
  74
  75                 StrBufPrintf(SpoolMsg,
  76                              "Content-type: " SPOOLMIME "\n"
  77                              "\n"
  78                              "msgid|%s\n"
  79                              "submitted|%ld\n" "bounceto|%s\n", msg->cm_fields[eVltMsgNum], (long) time(NULL), recps->bounce_to);
  80
  81                 if (recps->envelope_from != NULL) {
  82                         StrBufAppendBufPlain(SpoolMsg, HKEY("envelope_from|"), 0);
  83                         StrBufAppendBufPlain(SpoolMsg, recps->envelope_from, -1, 0);
  84                         StrBufAppendBufPlain(SpoolMsg, HKEY("\n"), 0);
  85                 }
  86                 if (recps->sending_room != NULL) {
  87                         StrBufAppendBufPlain(SpoolMsg, HKEY("source_room|"), 0);
  88                         StrBufAppendBufPlain(SpoolMsg, recps->sending_room, -1, 0);
  89                         StrBufAppendBufPlain(SpoolMsg, HKEY("\n"), 0);
  90                 }
  91
  92                 nTokens = num_tokens(recps->recp_internet, '|');
  93                 for (i = 0; i < nTokens; i++) {
  94                         long len;
  95                         len = extract_token(recipient, recps->recp_internet, i, '|', sizeof recipient);
  96                         if (len > 0) {
  97                                 StrBufAppendBufPlain(SpoolMsg, HKEY("remote|"), 0);
  98                                 StrBufAppendBufPlain(SpoolMsg, recipient, len, 0);
  99                                 StrBufAppendBufPlain(SpoolMsg, HKEY("|0||\n"), 0);
 100                         }
 101                 }
 102
 103                 imsg = malloc(sizeof(struct CtdlMessage));
 104                 memset(imsg, 0, sizeof(struct CtdlMessage));
 105                 imsg->cm_magic = CTDLMESSAGE_MAGIC;
 106                 imsg->cm_anon_type = MES_NORMAL;
 107                 imsg->cm_format_type = FMT_RFC822;
 108                 CM_SetField(imsg, eMsgSubject, HKEY("QMSG"));
 109                 CM_SetField(imsg, eAuthor, HKEY("Citadel"));
 110                 CM_SetField(imsg, eJournal, HKEY("do not journal"));
 111                 CM_SetAsFieldSB(imsg, eMesageText, &SpoolMsg);
 112                 last_queue_job_submitted = CtdlSubmitMsg(imsg, NULL, SMTP_SPOOLOUT_ROOM);
 113                 CM_Free(imsg);
 114         }
 115         return 0;
 116 }
 117
 118
 119 // Callback for smtp_attempt_delivery() to supply libcurl with upload data.
 120 static size_t upload_source(void *ptr, size_t size, size_t nmemb, void *userp) {
 121         struct smtpmsgsrc *s = (struct smtpmsgsrc *) userp;
 122         int sendbytes = 0;
 123         const char *send_this = NULL;
 124
 125         sendbytes = (size * nmemb);
 126
 127         if (s->bytes_sent >= s->bytes_total) {
 128                 return (0);                                     // no data remaining; we are done
 129         }
 130
 131         if (sendbytes > (s->bytes_total - s->bytes_sent)) {
 132                 sendbytes = s->bytes_total - s->bytes_sent;     // can't send more than we have
 133         }
 134
 135         send_this = ChrPtr(s->TheMessage);
 136         send_this += s->bytes_sent;                             // start where we last left off
 137
 138         memcpy(ptr, send_this, sendbytes);
 139         s->bytes_sent += sendbytes;
 140         return(sendbytes);                                      // return the number of bytes _actually_ copied
 141 }
 142
 143
 144 // The libcurl API doesn't provide a way to capture the actual SMTP result message returned
 145 // by the remote server.  This is an ugly way to extract it, by capturing debug data from
 146 // the library and filtering on the lines we want.
 147 int ctdl_libcurl_smtp_debug_callback(CURL *handle, curl_infotype type, char *data, size_t size, void *userptr) {
 148         if (type != CURLINFO_HEADER_IN)
 149                 return 0;
 150         if (!userptr)
 151                 return 0;
 152         char *debugbuf = (char *) userptr;
 153
 154         int len = strlen(debugbuf);
 155         if (len + size > SIZ)
 156                 return 0;
 157
 158         memcpy(&debugbuf[len], data, size);
 159         debugbuf[len + size] = 0;
 160         return 0;
 161 }
 162
 163
 164 // Go through the debug output of an SMTP transaction, and boil it down to just the final success or error response message.
 165 void trim_response(long response_code, char *response) {
 166         if ((response_code < 100) || (response_code > 999) || (IsEmptyStr(response))) {
 167                 return;
 168         }
 169
 170         char *t = malloc(strlen(response));
 171         if (!t) {
 172                 return;
 173         }
 174         t[0] = 0;
 175
 176         char *p;
 177         for (p = response; *p != 0; ++p) {
 178                 if ( (*p != '\n') && (!isprint(*p)) ) {         // expunge any nonprintables except for newlines
 179                         *p = ' ';
 180                 }
 181         }
 182
 183         char response_code_str[4];
 184         snprintf(response_code_str, sizeof response_code_str, "%ld", response_code);
 185         char *respstart = strstr(response, response_code_str);
 186         if (respstart == NULL) {                                // If we have a response code but no response text,
 187                 strcpy(response, smtpstatus(response_code));    // use one of our canned messages.
 188                 return;
 189         }
 190         strcpy(response, respstart);
 191
 192         p = strstr(response, "\n");
 193         if (p != NULL) {
 194                 *p = 0;
 195         }
 196 }
 197
 198
 199 // Attempt a delivery to one recipient.
 200 // Returns a three-digit SMTP status code.
 201 int smtp_attempt_delivery(long msgid, char *recp, char *envelope_from, char *source_room, char *response) {
 202         struct smtpmsgsrc s;
 203         char *fromaddr = NULL;
 204         CURL *curl;
 205         CURLcode res = CURLE_OK;
 206         struct curl_slist *recipients = NULL;
 207         long response_code = 421;
 208         int num_mx = 0;
 209         char mxes[SIZ];
 210         char user[1024];
 211         char node[1024];
 212         char name[1024];
 213         char try_this_mx[256];
 214         char smtp_url[512];
 215         int i;
 216
 217         syslog(LOG_DEBUG, "smtpclient: smtp_attempt_delivery(%ld, %s)", msgid, recp);
 218
 219         process_rfc822_addr(recp, user, node, name);    // split recipient address into username, hostname, displayname
 220         num_mx = getmx(mxes, node);
 221         if (num_mx < 1) {
 222                 return (421);
 223         }
 224
 225         CC->redirect_buffer = NewStrBufPlain(NULL, SIZ);
 226         if (!IsEmptyStr(source_room)) {
 227                 // If we have a source room, it's probably a mailing list message; generate an unsubscribe header
 228                 char esc_room[ROOMNAMELEN*2];
 229                 char esc_email[1024];
 230                 urlesc(esc_room, sizeof esc_room, source_room);
 231                 urlesc(esc_email, sizeof esc_email, recp);
 232                 cprintf("List-Unsubscribe: <http://%s/listsub?cmd=unsubscribe&room=%s&email=%s>\r\n",
 233                         CtdlGetConfigStr("c_fqdn"),
 234                         esc_room,
 235                         esc_email
 236                 );
 237         }
 238         CtdlOutputMsg(msgid, MT_RFC822, HEADERS_ALL, 0, 1, NULL, 0, NULL, &fromaddr, NULL);
 239         s.TheMessage = CC->redirect_buffer;
 240         s.bytes_total = StrLength(CC->redirect_buffer);
 241         s.bytes_sent = 0;
 242         CC->redirect_buffer = NULL;
 243         response_code = 421;
 244                                         // keep trying MXes until one works or we run out
 245         for (i = 0; ((i < num_mx) && ((response_code / 100) == 4)); ++i) {
 246                 response_code = 421;    // default 421 makes non-protocol errors transient
 247                 s.bytes_sent = 0;       // rewind our buffer in case we try multiple MXes
 248
 249                 curl = curl_easy_init();
 250                 if (curl) {
 251                         response[0] = 0;
 252
 253                         if (!IsEmptyStr(envelope_from)) {
 254                                 curl_easy_setopt(curl, CURLOPT_MAIL_FROM, envelope_from);
 255                         }
 256                         else {
 257                                 curl_easy_setopt(curl, CURLOPT_MAIL_FROM, fromaddr);
 258                         }
 259
 260                         recipients = curl_slist_append(recipients, recp);
 261                         curl_easy_setopt(curl, CURLOPT_MAIL_RCPT, recipients);
 262                         curl_easy_setopt(curl, CURLOPT_READFUNCTION, upload_source);
 263                         curl_easy_setopt(curl, CURLOPT_READDATA, &s);
 264                         curl_easy_setopt(curl, CURLOPT_UPLOAD, 1);                              // tell libcurl we are uploading
 265                         curl_easy_setopt(curl, CURLOPT_TIMEOUT, 20L);                           // Time out after 20 seconds
 266                         if (CtdlGetConfigInt("c_smtpclient_disable_starttls") == 0) {
 267                                 curl_easy_setopt(curl, CURLOPT_USE_SSL, CURLUSESSL_TRY);        // Attempt STARTTLS if offered
 268                         }
 269                         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
 270                         curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L);
 271                         curl_easy_setopt(curl, CURLOPT_DEBUGFUNCTION, ctdl_libcurl_smtp_debug_callback);
 272                         curl_easy_setopt(curl, CURLOPT_DEBUGDATA, (void *) response);
 273                         curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
 274
 275                         // Construct an SMTP URL in the form of:
 276                         //      smtp[s]://target_host/source_host
 277                         // This looks weird but libcurl uses that last part to set our name for EHLO or HELO.
 278                         // We check for "smtp://" and "smtps://" because the admin may have put those prefixes in a smart-host entry.
 279                         // If there is no prefix we add "smtp://"
 280                         extract_token(try_this_mx, mxes, i, '|', (sizeof try_this_mx - 7));
 281                         snprintf(smtp_url, sizeof smtp_url,
 282                                 "%s%s/%s",
 283                                 (((!strncasecmp(try_this_mx, HKEY("smtp://")))
 284                                 || (!strncasecmp(try_this_mx, HKEY("smtps://")))) ? "" : "smtp://"),
 285                                 try_this_mx, CtdlGetConfigStr("c_fqdn")
 286                         );
 287                         curl_easy_setopt(curl, CURLOPT_URL, smtp_url);
 288                         syslog(LOG_DEBUG, "smtpclient: trying MX %d of %d <%s>", i+1, num_mx, smtp_url);        // send the message
 289                         res = curl_easy_perform(curl);
 290                         curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &response_code);
 291                         syslog(LOG_DEBUG,
 292                                "smtpclient: libcurl returned %d (%s) , SMTP response %ld",
 293                                res, curl_easy_strerror(res), response_code
 294                         );
 295
 296                         if ((res != CURLE_OK) && (response_code == 0)) {        // check for errors
 297                                 response_code = 421;
 298                         }
 299
 300                         curl_slist_free_all(recipients);
 301                         recipients = NULL;                                      // this gets reused; avoid double-free
 302                         curl_easy_cleanup(curl);
 303                         curl = NULL;                                            // this gets reused; avoid double-free
 304
 305                         // Trim the error message buffer down to just the actual message
 306                         trim_response(response_code, response);
 307                 }
 308         }
 309
 310         FreeStrBuf(&s.TheMessage);
 311         if (fromaddr) {
 312                 free(fromaddr);
 313         }
 314         return ((int) response_code);
 315 }
 316
 317
 318 // Process one outbound message.
 319 void smtp_process_one_msg(long qmsgnum) {
 320         struct CtdlMessage *msg = NULL;
 321         char *instr = NULL;
 322         int i;
 323         int num_success = 0;
 324         int num_fail = 0;
 325         int num_delayed = 0;
 326         long deletes[2];
 327         int delete_this_queue = 0;
 328         char server_response[SIZ];
 329
 330         msg = CtdlFetchMessage(qmsgnum, 1);
 331         if (msg == NULL) {
 332                 syslog(LOG_WARNING, "smtpclient: %ld does not exist", qmsgnum);
 333                 return;
 334         }
 335
 336         instr = msg->cm_fields[eMesageText];
 337         msg->cm_fields[eMesageText] = NULL;
 338         CM_Free(msg);
 339
 340         // if the queue job message has any CRLF's convert them to LF's
 341         char *crlf = NULL;
 342         while (crlf = strstr(instr, "\r\n"), crlf != NULL) {
 343                 strcpy(crlf, crlf + 1);
 344         }
 345
 346         // Strip out the headers and we are now left with just the instructions.
 347         char *soi = strstr(instr, "\n\n");
 348         if (soi) {
 349                 strcpy(instr, soi + 2);
 350         }
 351
 352         long msgid = 0;
 353         time_t submitted = time(NULL);
 354         time_t attempted = 0;
 355         char *bounceto = NULL;
 356         char *envelope_from = NULL;
 357         char *source_room = NULL;
 358
 359         char cfgline[SIZ];
 360         for (i = 0; i < num_tokens(instr, '\n'); ++i) {
 361                 extract_token(cfgline, instr, i, '\n', sizeof cfgline);
 362                 if (!strncasecmp(cfgline, HKEY("msgid|")))
 363                         msgid = atol(&cfgline[6]);
 364                 if (!strncasecmp(cfgline, HKEY("submitted|")))
 365                         submitted = atol(&cfgline[10]);
 366                 if (!strncasecmp(cfgline, HKEY("attempted|")))
 367                         attempted = atol(&cfgline[10]);
 368                 if (!strncasecmp(cfgline, HKEY("bounceto|")))
 369                         bounceto = strdup(&cfgline[9]);
 370                 if (!strncasecmp(cfgline, HKEY("envelope_from|")))
 371                         envelope_from = strdup(&cfgline[14]);
 372                 if (!strncasecmp(cfgline, HKEY("source_room|")))
 373                         source_room = strdup(&cfgline[12]);
 374         }
 375
 376         int should_try_now = 0;
 377         if (attempted < submitted) {                    // If no attempts have been made yet, try now
 378                 should_try_now = 1;
 379         }
 380         else if ((attempted - submitted) <= 14400) {
 381                 if ((time(NULL) - attempted) > 1800) {  // First four hours, retry every 30 minutes
 382                         should_try_now = 1;
 383                 }
 384         }
 385         else {
 386                 if ((time(NULL) - attempted) > 14400) { // After that, retry once every 4 hours
 387                         should_try_now = 1;
 388                 }
 389         }
 390
 391         if (should_try_now) {
 392                 syslog(LOG_DEBUG, "smtpclient: attempting delivery of message <%ld> now", qmsgnum);
 393                 if (source_room) {
 394                         syslog(LOG_DEBUG, "smtpclient: this message originated in <%s>", source_room);
 395                 }
 396                 StrBuf *NewInstr = NewStrBuf();
 397                 StrBufAppendPrintf(NewInstr, "Content-type: " SPOOLMIME "\n\n");
 398                 StrBufAppendPrintf(NewInstr, "msgid|%ld\n", msgid);
 399                 StrBufAppendPrintf(NewInstr, "submitted|%ld\n", submitted);
 400                 if (bounceto) {
 401                         StrBufAppendPrintf(NewInstr, "bounceto|%s\n", bounceto);
 402                 }
 403                 if (envelope_from) {
 404                         StrBufAppendPrintf(NewInstr, "envelope_from|%s\n", envelope_from);
 405                 }
 406                 for (i = 0; i < num_tokens(instr, '\n'); ++i) {
 407                         extract_token(cfgline, instr, i, '\n', sizeof cfgline);
 408                         if (!strncasecmp(cfgline, HKEY("remote|"))) {
 409                                 char recp[SIZ];
 410                                 int previous_result = extract_int(cfgline, 2);
 411                                 if ((previous_result == 0) || (previous_result == 4)) {
 412                                         int new_result = 421;
 413                                         extract_token(recp, cfgline, 1, '|', sizeof recp);
 414                                         new_result = smtp_attempt_delivery(msgid, recp, envelope_from, source_room, server_response);
 415                                         syslog(LOG_DEBUG, "smtpclient: recp: <%s> , result: %d (%s)", recp, new_result, server_response);
 416                                         if ((new_result / 100) == 2) {
 417                                                 ++num_success;
 418                                         }
 419                                         else {
 420                                                 if ((new_result / 100) == 5) {
 421                                                         ++num_fail;
 422                                                 }
 423                                                 else {
 424                                                         ++num_delayed;
 425                                                 }
 426                                                 StrBufAppendPrintf(NewInstr, "remote|%s|%ld|%ld (%s)\n", recp, (new_result / 100), new_result, server_response);
 427                                         }
 428                                 }
 429                         }
 430                 }
 431
 432                 StrBufAppendPrintf(NewInstr, "attempted|%ld\n", time(NULL));
 433
 434                 // All deliveries have now been attempted.  Now determine the disposition of this queue entry.
 435
 436                 time_t age = time(NULL) - submitted;
 437                 syslog(LOG_DEBUG,
 438                        "smtpclient: submission age: %ldd%ldh%ldm%lds",
 439                        (age / 86400), ((age % 86400) / 3600), ((age % 3600) / 60), (age % 60));
 440                 syslog(LOG_DEBUG, "smtpclient: num_success=%d , num_fail=%d , num_delayed=%d", num_success, num_fail, num_delayed);
 441
 442                 // If there are permanent fails on this attempt, deliver a bounce to the user.
 443                 // The 5XX fails will be recorded in the rewritten queue, but they will be removed before the next attempt.
 444                 if (num_fail > 0) {
 445                         smtp_do_bounce(ChrPtr(NewInstr), SDB_BOUNCE_FATALS);
 446                 }
 447                 // If all deliveries have either succeeded or failed, we are finished with this queue entry.
 448                 if (num_delayed == 0) {
 449                         delete_this_queue = 1;
 450                 }
 451                 // If it's been more than five days, give up and tell the sender that delivery failed
 452                 else if ((time(NULL) - submitted) > SMTP_DELIVER_FAIL) {
 453                         smtp_do_bounce(ChrPtr(NewInstr), SDB_BOUNCE_ALL);
 454                         delete_this_queue = 1;
 455                 }
 456                 // If it's been more than four hours but less than five days, warn the sender that delivery is delayed
 457                 else if (((attempted - submitted) < SMTP_DELIVER_WARN) && ((time(NULL) - submitted) >= SMTP_DELIVER_WARN)) {
 458                         smtp_do_bounce(ChrPtr(NewInstr), SDB_WARN);
 459                 }
 460
 461                 if (delete_this_queue) {
 462                         syslog(LOG_DEBUG, "smtpclient: %ld deleting", qmsgnum);
 463                         deletes[0] = qmsgnum;
 464                         deletes[1] = msgid;
 465                         CtdlDeleteMessages(SMTP_SPOOLOUT_ROOM, deletes, 2, "");
 466                         FreeStrBuf(&NewInstr);  // We have to free NewInstr here, no longer needed
 467                 }
 468                 else {
 469                         // replace the old queue entry with the new one
 470                         syslog(LOG_DEBUG, "smtpclient: %ld rewriting", qmsgnum);
 471                         msg = convert_internet_message_buf(&NewInstr);  // This function will free NewInstr for us
 472                         CtdlSubmitMsg(msg, NULL, SMTP_SPOOLOUT_ROOM);
 473                         CM_Free(msg);
 474                         CtdlDeleteMessages(SMTP_SPOOLOUT_ROOM, &qmsgnum, 1, "");
 475                 }
 476         }
 477         else {
 478                 syslog(LOG_DEBUG, "smtpclient: %ld retry time not reached", qmsgnum);
 479         }
 480
 481         if (bounceto != NULL) {
 482                 free(bounceto);
 483         }
 484         if (envelope_from != NULL) {
 485                 free(envelope_from);
 486         }
 487         if (source_room != NULL) {
 488                 free(source_room);
 489         }
 490         free(instr);
 491 }
 492
 493
 494 // Callback for smtp_do_queue()
 495 void smtp_add_msg(long msgnum, void *userdata) {
 496         Array *smtp_queue = (Array *) userdata;
 497         array_append(smtp_queue, &msgnum);
 498 }
 499
 500
 501 enum {
 502         FULL_QUEUE_RUN,         // try to process the entire queue, including messages that have already been attempted
 503         QUICK_QUEUE_RUN         // only process jobs in the queue that have not been tried yet
 504 };
 505
 506
 507 // Run through the queue sending out messages.
 508 void smtp_do_queue(int type_of_queue_run) {
 509         static int doing_smtpclient = 0;
 510         int i = 0;
 511
 512         // This is a concurrency check to make sure only one smtpclient run is done at a time.
 513         begin_critical_section(S_SMTPQUEUE);
 514         if (doing_smtpclient) {
 515                 end_critical_section(S_SMTPQUEUE);
 516                 return;
 517         }
 518         doing_smtpclient = 1;
 519         end_critical_section(S_SMTPQUEUE);
 520
 521         syslog(LOG_DEBUG, "smtpclient: start queue run , last_queue_job_processed=%ld , last_queue_job_submitted=%ld", last_queue_job_processed, last_queue_job_submitted);
 522
 523         if (CtdlGetRoom(&CC->room, SMTP_SPOOLOUT_ROOM) != 0) {
 524                 syslog(LOG_WARNING, "smtpclient: cannot find room <%s>", SMTP_SPOOLOUT_ROOM);
 525                 doing_smtpclient = 0;
 526                 return;
 527         }
 528
 529         // This array will hold the list of queue job messages
 530         Array *smtp_queue = array_new(sizeof(long));
 531         if (smtp_queue == NULL) {
 532                 syslog(LOG_WARNING, "smtpclient: cannot allocate queue array");
 533                 doing_smtpclient = 0;
 534                 return;
 535         }
 536
 537         // Put the queue in memory so we can close the db cursor
 538         CtdlForEachMessage(
 539                 (type_of_queue_run == QUICK_QUEUE_RUN ? MSGS_GT : MSGS_ALL),                    // quick = new jobs; full = all jobs
 540                 (type_of_queue_run == QUICK_QUEUE_RUN ? last_queue_job_processed : 0),          // quick = new jobs; full = all jobs
 541                 NULL,
 542                 SPOOLMIME,              // Searching for Content-type of SPOOLIME will give us only queue instruction messages
 543                 NULL,
 544                 smtp_add_msg,           // That's our callback function to add a job to the queue
 545                 (void *)smtp_queue
 546         );
 547
 548         // We are ready to run through the queue now.
 549         for (i = 0; i < array_len(smtp_queue); ++i) {
 550                 long m;
 551                 memcpy(&m, array_get_element_at(smtp_queue, i), sizeof(long));
 552                 smtp_process_one_msg(m);
 553                 last_queue_job_processed = m;
 554         }
 555
 556         array_free(smtp_queue);
 557         doing_smtpclient = 0;
 558         syslog(LOG_DEBUG, "smtpclient: end queue run , last_queue_job_processed=%ld , last_queue_job_submitted=%ld", last_queue_job_processed, last_queue_job_submitted);
 559 }
 560
 561
 562 void smtp_do_queue_full(void) {
 563         smtp_do_queue(FULL_QUEUE_RUN);
 564 }
 565
 566
 567 void smtp_do_queue_quick(void) {
 568         if (last_queue_job_submitted > last_queue_job_processed) {
 569                 smtp_do_queue(QUICK_QUEUE_RUN);
 570         }
 571 }
 572
 573
 574 // Initialization function, called from modules_init.c
 575 char *ctdl_module_init_smtpclient(void) {
 576         if (!threading) {
 577                 CtdlRegisterMessageHook(smtp_aftersave, EVT_AFTERSAVE);
 578                 CtdlRegisterSessionHook(smtp_do_queue_quick, EVT_HOUSE, PRIO_AGGR + 51);
 579                 CtdlRegisterSessionHook(smtp_do_queue_full, EVT_TIMER, PRIO_AGGR + 51);
 580                 smtp_init_spoolout();
 581         }
 582
 583         // return our module id for the log
 584         return "smtpclient";
 585 }