citadel/modules/eventclient/serv_eventclient.c

   1 /*
   2  * Copyright (c) 1998-2012 by the citadel.org team
   3  *
   4  *  This program is open source software; you can redistribute it and/or modify
   5  *  it under the terms of the GNU General Public License version 3.
   6  *
   7  *
   8  *
   9  *  This program is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *  GNU General Public License for more details.
  13  *
  14  *
  15  *
  16  *
  17  */
  18
  19 #include "sysdep.h"
  20 #include <stdlib.h>
  21 #include <unistd.h>
  22 #include <stdio.h>
  23 #include <termios.h>
  24 #include <fcntl.h>
  25 #include <signal.h>
  26 #include <pwd.h>
  27 #include <errno.h>
  28 #include <sys/types.h>
  29 #include <syslog.h>
  30
  31 #if TIME_WITH_SYS_TIME
  32 # include <sys/time.h>
  33 # include <time.h>
  34 #else
  35 # if HAVE_SYS_TIME_H
  36 #  include <sys/time.h>
  37 # else
  38 #  include <time.h>
  39 # endif
  40 #endif
  41 #include <sys/wait.h>
  42 #include <ctype.h>
  43 #include <string.h>
  44 #include <limits.h>
  45 #include <sys/socket.h>
  46 #include <netinet/in.h>
  47 #include <assert.h>
  48 #include <arpa/inet.h>
  49 #include <libcitadel.h>
  50 #include <curl/curl.h>
  51 #include <curl/multi.h>
  52 #include "citadel.h"
  53 #include "server.h"
  54 #include "citserver.h"
  55 #include "support.h"
  56
  57 #include "ctdl_module.h"
  58
  59 #include "event_client.h"
  60 #include "serv_curl.h"
  61
  62 ev_loop *event_base;
  63 int DebugEventLoop = 0;
  64 int DebugEventLoopBacktrace = 0;
  65 int DebugCurl = 0;
  66
  67 long EvIDSource = 1;
  68 /*****************************************************************************
  69  *                   libevent / curl integration                             *
  70  *****************************************************************************/
  71 #define DBGLOG(LEVEL) if ((LEVEL != LOG_DEBUG) || (DebugCurl != 0))
  72
  73 #define EVCURL_syslog(LEVEL, FORMAT, ...)                               \
  74         DBGLOG (LEVEL) syslog(LEVEL, "EVCURL:IO[%ld]CC[%d] " FORMAT,    \
  75                               IO->ID, CCID, __VA_ARGS__)
  76
  77 #define EVCURLM_syslog(LEVEL, FORMAT)                                   \
  78         DBGLOG (LEVEL) syslog(LEVEL, "EVCURL:IO[%ld]CC[%d] " FORMAT,    \
  79                               IO->ID, CCID)
  80
  81 #define CURL_syslog(LEVEL, FORMAT, ...)                                 \
  82         DBGLOG (LEVEL) syslog(LEVEL, "CURL: " FORMAT, __VA_ARGS__)
  83
  84 #define CURLM_syslog(LEVEL, FORMAT)                     \
  85         DBGLOG (LEVEL) syslog(LEVEL, "CURL: " FORMAT)
  86
  87 #define MOPT(s, v)                                                      \
  88         do {                                                            \
  89                 sta = curl_multi_setopt(mhnd, (CURLMOPT_##s), (v));     \
  90                 if (sta) {                                              \
  91                         EVQ_syslog(LOG_ERR, "error setting option "     \
  92                                #s " on curl multi handle: %s\n",        \
  93                                curl_easy_strerror(sta));                \
  94                         exit (1);                                       \
  95                 }                                                       \
  96         } while (0)
  97
  98
  99 typedef struct _evcurl_global_data {
 100         int magic;
 101         CURLM *mhnd;
 102         ev_timer timeev;
 103         int nrun;
 104 } evcurl_global_data;
 105
 106 ev_async WakeupCurl;
 107 evcurl_global_data global;
 108
 109 static void
 110 gotstatus(int nnrun)
 111 {
 112         CURLMsg *msg;
 113         int nmsg;
 114
 115         global.nrun = nnrun;
 116
 117         CURLM_syslog(LOG_DEBUG,
 118                      "gotstatus(): about to call curl_multi_info_read\n");
 119         while ((msg = curl_multi_info_read(global.mhnd, &nmsg))) {
 120                 CURL_syslog(LOG_DEBUG,
 121                             "got curl multi_info message msg=%d\n",
 122                             msg->msg);
 123
 124                 if (CURLMSG_DONE == msg->msg) {
 125                         CURL *chnd;
 126                         char *chandle = NULL;
 127                         CURLcode sta;
 128                         CURLMcode msta;
 129                         AsyncIO*IO;
 130
 131                         chandle = NULL;;
 132                         chnd = msg->easy_handle;
 133                         sta = curl_easy_getinfo(chnd,
 134                                                 CURLINFO_PRIVATE,
 135                                                 &chandle);
 136                         if (sta) {
 137                                 syslog(LOG_ERR,
 138                                        "error asking curl for private"
 139                                        " cookie of curl handle: %s\n",
 140                                        curl_easy_strerror(sta));
 141                                 continue;
 142                         }
 143                         IO = (AsyncIO *)chandle;
 144                         if (IO->ID == 0) {
 145                                 EVCURL_syslog(LOG_ERR,
 146                                               "Error, invalid IO context %p\n",
 147                                               IO);
 148                                 continue;
 149                         }
 150                         SetEVState(IO, eCurlGotStatus);
 151
 152                         EVCURLM_syslog(LOG_DEBUG, "request complete\n");
 153
 154                         IO->Now = ev_now(event_base);
 155
 156                         ev_io_stop(event_base, &IO->recv_event);
 157                         ev_io_stop(event_base, &IO->send_event);
 158
 159                         sta = msg->data.result;
 160                         if (sta) {
 161                                 EVCURL_syslog(LOG_ERR,
 162                                               "error description: %s\n",
 163                                               IO->HttpReq.errdesc);
 164                                 EVCURL_syslog(LOG_ERR,
 165                                               "error performing request: %s\n",
 166                                               curl_easy_strerror(sta));
 167                         }
 168                         sta = curl_easy_getinfo(chnd,
 169                                                 CURLINFO_RESPONSE_CODE,
 170                                                 &IO->HttpReq.httpcode);
 171                         if (sta)
 172                                 EVCURL_syslog(LOG_ERR,
 173                                               "error asking curl for "
 174                                               "response code from request: %s\n",
 175                                               curl_easy_strerror(sta));
 176                         EVCURL_syslog(LOG_DEBUG,
 177                                       "http response code was %ld\n",
 178                                       (long)IO->HttpReq.httpcode);
 179
 180
 181                         curl_slist_free_all(IO->HttpReq.headers);
 182                         msta = curl_multi_remove_handle(global.mhnd, chnd);
 183                         if (msta)
 184                                 EVCURL_syslog(LOG_ERR,
 185                                               "warning problem detaching "
 186                                               "completed handle from curl multi: "
 187                                               "%s\n",
 188                                               curl_multi_strerror(msta));
 189
 190                         ev_cleanup_stop(event_base, &IO->abort_by_shutdown);
 191
 192                         IO->HttpReq.attached = 0;
 193                         switch(IO->SendDone(IO))
 194                         {
 195                         case eDBQuery:
 196                         case eSendDNSQuery:
 197                         case eReadDNSReply:
 198                         case eConnect:
 199                         case eSendReply:
 200                         case eSendMore:
 201                         case eSendFile:
 202                         case eReadMessage:
 203                         case eReadMore:
 204                         case eReadPayload:
 205                         case eReadFile:
 206                                 break;
 207                         case eTerminateConnection:
 208                         case eAbort:
 209                                 curl_easy_cleanup(IO->HttpReq.chnd);
 210                                 IO->HttpReq.chnd = NULL;
 211                                 FreeStrBuf(&IO->HttpReq.ReplyData);
 212                                 FreeURL(&IO->ConnectMe);
 213                                 RemoveContext(IO->CitContext);
 214                                 IO->Terminate(IO);
 215                         }
 216                 }
 217         }
 218 }
 219
 220 static void
 221 stepmulti(void *data, curl_socket_t fd, int which)
 222 {
 223         int running_handles = 0;
 224         CURLMcode msta;
 225
 226         msta = curl_multi_socket_action(global.mhnd,
 227                                         fd,
 228                                         which,
 229                                         &running_handles);
 230
 231         CURLM_syslog(LOG_DEBUG, "stepmulti(): calling gotstatus()\n");
 232         if (msta)
 233                 CURL_syslog(LOG_ERR,
 234                             "error in curl processing events"
 235                             "on multi handle, fd %d: %s\n",
 236                             (int)fd,
 237                             curl_multi_strerror(msta));
 238
 239         if (global.nrun != running_handles)
 240                 gotstatus(running_handles);
 241 }
 242
 243 static void
 244 gottime(struct ev_loop *loop, ev_timer *timeev, int events)
 245 {
 246         CURLM_syslog(LOG_DEBUG, "EVCURL: waking up curl for timeout\n");
 247         stepmulti(NULL, CURL_SOCKET_TIMEOUT, 0);
 248 }
 249
 250 static void
 251 got_in(struct ev_loop *loop, ev_io *ioev, int events)
 252 {
 253         CURL_syslog(LOG_DEBUG,
 254                     "EVCURL: waking up curl for io on fd %d\n",
 255                     (int)ioev->fd);
 256
 257         stepmulti(ioev->data, ioev->fd, CURL_CSELECT_IN);
 258 }
 259
 260 static void
 261 got_out(struct ev_loop *loop, ev_io *ioev, int events)
 262 {
 263         CURL_syslog(LOG_DEBUG,
 264                     "waking up curl for io on fd %d\n",
 265                     (int)ioev->fd);
 266
 267         stepmulti(ioev->data, ioev->fd, CURL_CSELECT_OUT);
 268 }
 269
 270 static size_t
 271 gotdata(void *data, size_t size, size_t nmemb, void *cglobal)
 272 {
 273         AsyncIO *IO = (AsyncIO*) cglobal;
 274
 275         SetEVState(IO, eCurlGotData);
 276         if (IO->HttpReq.ReplyData == NULL)
 277         {
 278                 IO->HttpReq.ReplyData = NewStrBufPlain(NULL, SIZ);
 279         }
 280         IO->Now = ev_now(event_base);
 281         return CurlFillStrBuf_callback(data,
 282                                        size,
 283                                        nmemb,
 284                                        IO->HttpReq.ReplyData);
 285 }
 286
 287 static int
 288 gotwatchtime(CURLM *multi, long tblock_ms, void *cglobal) {
 289         CURL_syslog(LOG_DEBUG, "EVCURL: gotwatchtime called %ld ms\n", tblock_ms);
 290         evcurl_global_data *global = cglobal;
 291         ev_timer_stop(EV_DEFAULT, &global->timeev);
 292         if (tblock_ms < 0 || 14000 < tblock_ms)
 293                 tblock_ms = 14000;
 294         ev_timer_set(&global->timeev, 0.5e-3 + 1.0e-3 * tblock_ms, 14.0);
 295         ev_timer_start(EV_DEFAULT_UC, &global->timeev);
 296         curl_multi_perform(global, &global->nrun);
 297         return 0;
 298 }
 299
 300 static int
 301 gotwatchsock(CURL *easy,
 302              curl_socket_t fd,
 303              int action,
 304              void *cglobal,
 305              void *vIO)
 306 {
 307         evcurl_global_data *global = cglobal;
 308         CURLM *mhnd = global->mhnd;
 309         char *f;
 310         AsyncIO *IO = (AsyncIO*) vIO;
 311         CURLcode sta;
 312         const char *Action;
 313
 314         if (IO == NULL) {
 315                 sta = curl_easy_getinfo(easy, CURLINFO_PRIVATE, &f);
 316                 if (sta) {
 317                         CURL_syslog(LOG_ERR,
 318                                     "EVCURL: error asking curl for private "
 319                                     "cookie of curl handle: %s\n",
 320                                     curl_easy_strerror(sta));
 321                         return -1;
 322                 }
 323                 IO = (AsyncIO *) f;
 324                 SetEVState(IO, eCurlNewIO);
 325                 EVCURL_syslog(LOG_DEBUG,
 326                               "EVCURL: got socket for URL: %s\n",
 327                               IO->ConnectMe->PlainUrl);
 328
 329                 if (IO->SendBuf.fd != 0)
 330                 {
 331                         ev_io_stop(event_base, &IO->recv_event);
 332                         ev_io_stop(event_base, &IO->send_event);
 333                 }
 334                 IO->SendBuf.fd = fd;
 335                 ev_io_init(&IO->recv_event, &got_in, fd, EV_READ);
 336                 ev_io_init(&IO->send_event, &got_out, fd, EV_WRITE);
 337                 curl_multi_assign(mhnd, fd, IO);
 338         }
 339
 340         SetEVState(IO, eCurlGotIO);
 341         IO->Now = ev_now(event_base);
 342
 343         Action = "";
 344         switch (action)
 345         {
 346         case CURL_POLL_NONE:
 347                 Action = "CURL_POLL_NONE";
 348                 break;
 349         case CURL_POLL_REMOVE:
 350                 Action = "CURL_POLL_REMOVE";
 351                 break;
 352         case CURL_POLL_IN:
 353                 Action = "CURL_POLL_IN";
 354                 break;
 355         case CURL_POLL_OUT:
 356                 Action = "CURL_POLL_OUT";
 357                 break;
 358         case CURL_POLL_INOUT:
 359                 Action = "CURL_POLL_INOUT";
 360                 break;
 361         }
 362
 363
 364         EVCURL_syslog(LOG_DEBUG,
 365                       "EVCURL: gotwatchsock called fd=%d action=%s[%d]\n",
 366                       (int)fd, Action, action);
 367
 368         switch (action)
 369         {
 370         case CURL_POLL_NONE:
 371                 EVCURLM_syslog(LOG_DEBUG,
 372                                "called first time "
 373                                "to register this sockwatcker\n");
 374                 break;
 375         case CURL_POLL_REMOVE:
 376                 EVCURLM_syslog(LOG_DEBUG,
 377                                "called last time to unregister "
 378                                "this sockwatcher\n");
 379                 ev_io_stop(event_base, &IO->recv_event);
 380                 ev_io_stop(event_base, &IO->send_event);
 381                 break;
 382         case CURL_POLL_IN:
 383                 ev_io_start(event_base, &IO->recv_event);
 384                 ev_io_stop(event_base, &IO->send_event);
 385                 break;
 386         case CURL_POLL_OUT:
 387                 ev_io_start(event_base, &IO->send_event);
 388                 ev_io_stop(event_base, &IO->recv_event);
 389                 break;
 390         case CURL_POLL_INOUT:
 391                 ev_io_start(event_base, &IO->send_event);
 392                 ev_io_start(event_base, &IO->recv_event);
 393                 break;
 394         }
 395         return 0;
 396 }
 397
 398 void curl_init_connectionpool(void)
 399 {
 400         CURLM *mhnd ;
 401
 402         ev_timer_init(&global.timeev, &gottime, 14.0, 14.0);
 403         global.timeev.data = (void *)&global;
 404         global.nrun = -1;
 405         CURLcode sta = curl_global_init(CURL_GLOBAL_ALL);
 406
 407         if (sta)
 408         {
 409                 CURL_syslog(LOG_ERR,
 410                             "error initializing curl library: %s\n",
 411                             curl_easy_strerror(sta));
 412
 413                 exit(1);
 414         }
 415         mhnd = global.mhnd = curl_multi_init();
 416         if (!mhnd)
 417         {
 418                 CURLM_syslog(LOG_ERR,
 419                              "error initializing curl multi handle\n");
 420                 exit(3);
 421         }
 422
 423         MOPT(SOCKETFUNCTION, &gotwatchsock);
 424         MOPT(SOCKETDATA, (void *)&global);
 425         MOPT(TIMERFUNCTION, &gotwatchtime);
 426         MOPT(TIMERDATA, (void *)&global);
 427
 428         return;
 429 }
 430
 431 int evcurl_init(AsyncIO *IO)
 432 {
 433         CURLcode sta;
 434         CURL *chnd;
 435
 436         EVCURLM_syslog(LOG_DEBUG, "EVCURL: evcurl_init called ms\n");
 437         IO->HttpReq.attached = 0;
 438         chnd = IO->HttpReq.chnd = curl_easy_init();
 439         if (!chnd)
 440         {
 441                 EVCURLM_syslog(LOG_ERR, "EVCURL: error initializing curl handle\n");
 442                 return 0;
 443         }
 444
 445 #if DEBUG
 446         OPT(VERBOSE, (long)1);
 447 #endif
 448         OPT(NOPROGRESS, 1L);
 449
 450         OPT(NOSIGNAL, 1L);
 451         OPT(FAILONERROR, (long)1);
 452         OPT(ENCODING, "");
 453         OPT(FOLLOWLOCATION, (long)0);
 454         OPT(MAXREDIRS, (long)0);
 455         OPT(USERAGENT, CITADEL);
 456
 457         OPT(TIMEOUT, (long)1800);
 458         OPT(LOW_SPEED_LIMIT, (long)64);
 459         OPT(LOW_SPEED_TIME, (long)600);
 460         OPT(CONNECTTIMEOUT, (long)600);
 461         OPT(PRIVATE, (void *)IO);
 462
 463         OPT(FORBID_REUSE, 1);
 464         OPT(WRITEFUNCTION, &gotdata);
 465         OPT(WRITEDATA, (void *)IO);
 466         OPT(ERRORBUFFER, IO->HttpReq.errdesc);
 467
 468         if ((!IsEmptyStr(config.c_ip_addr))
 469                 && (strcmp(config.c_ip_addr, "*"))
 470                 && (strcmp(config.c_ip_addr, "::"))
 471                 && (strcmp(config.c_ip_addr, "0.0.0.0"))
 472                 )
 473         {
 474                 OPT(INTERFACE, config.c_ip_addr);
 475         }
 476
 477 #ifdef CURLOPT_HTTP_CONTENT_DECODING
 478         OPT(HTTP_CONTENT_DECODING, 1);
 479         OPT(ENCODING, "");
 480 #endif
 481
 482         IO->HttpReq.headers = curl_slist_append(IO->HttpReq.headers,
 483                                                 "Connection: close");
 484
 485         return 1;
 486 }
 487
 488
 489 static void IOcurl_abort_shutdown_callback(struct ev_loop *loop,
 490                                            ev_cleanup *watcher,
 491                                            int revents)
 492 {
 493         CURLMcode msta;
 494         AsyncIO *IO = watcher->data;
 495
 496         if (IO == NULL)
 497                 return;
 498
 499         SetEVState(IO, eCurlShutdown);
 500         IO->Now = ev_now(event_base);
 501         EVCURL_syslog(LOG_DEBUG, "EVENT Curl: %s\n", __FUNCTION__);
 502
 503         curl_slist_free_all(IO->HttpReq.headers);
 504         msta = curl_multi_remove_handle(global.mhnd, IO->HttpReq.chnd);
 505         if (msta)
 506         {
 507                 EVCURL_syslog(LOG_ERR,
 508                               "EVCURL: warning problem detaching completed handle "
 509                               "from curl multi: %s\n",
 510                               curl_multi_strerror(msta));
 511         }
 512
 513         curl_easy_cleanup(IO->HttpReq.chnd);
 514         IO->HttpReq.chnd = NULL;
 515         ev_cleanup_stop(event_base, &IO->abort_by_shutdown);
 516         ev_io_stop(event_base, &IO->recv_event);
 517         ev_io_stop(event_base, &IO->send_event);
 518         assert(IO->ShutdownAbort);
 519         IO->ShutdownAbort(IO);
 520 }
 521 eNextState
 522 evcurl_handle_start(AsyncIO *IO)
 523 {
 524         CURLMcode msta;
 525         CURLcode sta;
 526         CURL *chnd;
 527
 528         SetEVState(IO, eCurlStart);
 529         chnd = IO->HttpReq.chnd;
 530         EVCURL_syslog(LOG_DEBUG,
 531                   "EVCURL: Loading URL: %s\n", IO->ConnectMe->PlainUrl);
 532         OPT(URL, IO->ConnectMe->PlainUrl);
 533         if (StrLength(IO->ConnectMe->CurlCreds))
 534         {
 535                 OPT(HTTPAUTH, (long)CURLAUTH_BASIC);
 536                 OPT(USERPWD, ChrPtr(IO->ConnectMe->CurlCreds));
 537         }
 538         if (StrLength(IO->HttpReq.PostData) > 0)
 539         {
 540                 OPT(POSTFIELDS, ChrPtr(IO->HttpReq.PostData));
 541                 OPT(POSTFIELDSIZE, StrLength(IO->HttpReq.PostData));
 542
 543         }
 544         else if ((IO->HttpReq.PlainPostDataLen != 0) &&
 545                  (IO->HttpReq.PlainPostData != NULL))
 546         {
 547                 OPT(POSTFIELDS, IO->HttpReq.PlainPostData);
 548                 OPT(POSTFIELDSIZE, IO->HttpReq.PlainPostDataLen);
 549         }
 550         OPT(HTTPHEADER, IO->HttpReq.headers);
 551
 552         IO->NextState = eConnect;
 553         EVCURLM_syslog(LOG_DEBUG, "EVCURL: attaching to curl multi handle\n");
 554         msta = curl_multi_add_handle(global.mhnd, IO->HttpReq.chnd);
 555         if (msta)
 556         {
 557                 EVCURL_syslog(LOG_ERR,
 558                           "EVCURL: error attaching to curl multi handle: %s\n",
 559                           curl_multi_strerror(msta));
 560         }
 561
 562         IO->HttpReq.attached = 1;
 563         ev_async_send (event_base, &WakeupCurl);
 564
 565         ev_cleanup_init(&IO->abort_by_shutdown,
 566                         IOcurl_abort_shutdown_callback);
 567
 568         ev_cleanup_start(event_base, &IO->abort_by_shutdown);
 569
 570         return eReadMessage;
 571 }
 572
 573 static void WakeupCurlCallback(EV_P_ ev_async *w, int revents)
 574 {
 575         CURLM_syslog(LOG_DEBUG, "waking up curl multi handle\n");
 576
 577         curl_multi_perform(&global, CURL_POLL_NONE);
 578 }
 579
 580 static void evcurl_shutdown (void)
 581 {
 582         curl_global_cleanup();
 583         curl_multi_cleanup(global.mhnd);
 584         CURLM_syslog(LOG_DEBUG, "exiting\n");
 585 }
 586 /*****************************************************************************
 587  *                       libevent integration                                *
 588  *****************************************************************************/
 589 /*
 590  * client event queue plus its methods.
 591  * this currently is the main loop (which may change in some future?)
 592  */
 593 int evbase_count = 0;
 594 pthread_mutex_t EventQueueMutex; /* locks the access to the following vars: */
 595 pthread_mutex_t EventExitQueueMutex; /* locks the access to the event queue pointer on exit. */
 596 HashList *QueueEvents = NULL;
 597 HashList *InboundEventQueue = NULL;
 598 HashList *InboundEventQueues[2] = { NULL, NULL };
 599 extern void ShutDownCLient(AsyncIO *IO);
 600
 601 ev_async AddJob;
 602 ev_async ExitEventLoop;
 603
 604 static void QueueEventAddCallback(EV_P_ ev_async *w, int revents)
 605 {
 606         CitContext *Ctx;
 607         ev_tstamp Now;
 608         HashList *q;
 609         void *v;
 610         HashPos*It;
 611         long len;
 612         const char *Key;
 613
 614         /* get the control command... */
 615         pthread_mutex_lock(&EventQueueMutex);
 616
 617         if (InboundEventQueues[0] == InboundEventQueue) {
 618                 InboundEventQueue = InboundEventQueues[1];
 619                 q = InboundEventQueues[0];
 620         }
 621         else {
 622                 InboundEventQueue = InboundEventQueues[0];
 623                 q = InboundEventQueues[1];
 624         }
 625         pthread_mutex_unlock(&EventQueueMutex);
 626         Now = ev_now (event_base);
 627         It = GetNewHashPos(q, 0);
 628         while (GetNextHashPos(q, It, &len, &Key, &v))
 629         {
 630                 IOAddHandler *h = v;
 631                 if (h->IO->ID == 0) {
 632                         h->IO->ID = EvIDSource++;
 633                 }
 634                 if (h->IO->StartIO == 0.0)
 635                         h->IO->StartIO = Now;
 636
 637                 SetEVState(h->IO, eIOAttach);
 638
 639                 Ctx = h->IO->CitContext;
 640                 become_session(Ctx);
 641
 642                 h->IO->Now = Now;
 643                 switch (h->EvAttch(h->IO))
 644                 {
 645                 case eReadMore:
 646                 case eReadMessage:
 647                 case eReadFile:
 648                 case eSendReply:
 649                 case eSendMore:
 650                 case eReadPayload:
 651                 case eSendFile:
 652                 case eDBQuery:
 653                 case eSendDNSQuery:
 654                 case eReadDNSReply:
 655                 case eConnect:
 656                         break;
 657                 case eTerminateConnection:
 658                 case eAbort:
 659                         ShutDownCLient(h->IO);
 660                 break;
 661                 }
 662         }
 663         DeleteHashPos(&It);
 664         DeleteHashContent(&q);
 665         EVQM_syslog(LOG_DEBUG, "EVENT Q Add done.\n");
 666 }
 667
 668
 669 static void EventExitCallback(EV_P_ ev_async *w, int revents)
 670 {
 671         ev_break(event_base, EVBREAK_ALL);
 672
 673         EVQM_syslog(LOG_DEBUG, "EVENT Q exiting.\n");
 674 }
 675
 676
 677
 678 void InitEventQueue(void)
 679 {
 680         pthread_mutex_init(&EventQueueMutex, NULL);
 681         pthread_mutex_init(&EventExitQueueMutex, NULL);
 682
 683         QueueEvents = NewHash(1, Flathash);
 684         InboundEventQueues[0] = NewHash(1, Flathash);
 685         InboundEventQueues[1] = NewHash(1, Flathash);
 686         InboundEventQueue = InboundEventQueues[0];
 687 }
 688 extern void CtdlDestroyEVCleanupHooks(void);
 689
 690 extern int EVQShutDown;
 691 /*
 692  * this thread operates the select() etc. via libev.
 693  */
 694 void *client_event_thread(void *arg)
 695 {
 696         struct CitContext libev_client_CC;
 697
 698         CtdlFillSystemContext(&libev_client_CC, "LibEv Thread");
 699 //      citthread_setspecific(MyConKey, (void *)&smtp_queue_CC);
 700         EVQM_syslog(LOG_DEBUG, "client_event_thread() initializing\n");
 701
 702         event_base = ev_default_loop (EVFLAG_AUTO);
 703         ev_async_init(&AddJob, QueueEventAddCallback);
 704         ev_async_start(event_base, &AddJob);
 705         ev_async_init(&ExitEventLoop, EventExitCallback);
 706         ev_async_start(event_base, &ExitEventLoop);
 707         ev_async_init(&WakeupCurl, WakeupCurlCallback);
 708         ev_async_start(event_base, &WakeupCurl);
 709
 710         curl_init_connectionpool();
 711
 712         ev_run (event_base, 0);
 713
 714         EVQM_syslog(LOG_DEBUG, "client_event_thread() exiting\n");
 715
 716 ///what todo here?      CtdlClearSystemContext();
 717         pthread_mutex_lock(&EventExitQueueMutex);
 718         ev_loop_destroy (EV_DEFAULT_UC);
 719         event_base = NULL;
 720         DeleteHash(&QueueEvents);
 721         InboundEventQueue = NULL;
 722         DeleteHash(&InboundEventQueues[0]);
 723         DeleteHash(&InboundEventQueues[1]);
 724 /*      citthread_mutex_destroy(&EventQueueMutex); TODO */
 725         evcurl_shutdown();
 726
 727         CtdlDestroyEVCleanupHooks();
 728
 729         pthread_mutex_unlock(&EventExitQueueMutex);
 730         EVQShutDown = 1;
 731         return(NULL);
 732 }
 733
 734 /*----------------------------------------------------------------------------*/
 735 /*
 736  * DB-Queue; does async bdb operations.
 737  * has its own set of handlers.
 738  */
 739 ev_loop *event_db;
 740 int evdb_count = 0;
 741 pthread_mutex_t DBEventQueueMutex; /* locks the access to the following vars: */
 742 pthread_mutex_t DBEventExitQueueMutex; /* locks the access to the db-event queue pointer on exit. */
 743 HashList *DBQueueEvents = NULL;
 744 HashList *DBInboundEventQueue = NULL;
 745 HashList *DBInboundEventQueues[2] = { NULL, NULL };
 746
 747 ev_async DBAddJob;
 748 ev_async DBExitEventLoop;
 749
 750 extern void ShutDownDBCLient(AsyncIO *IO);
 751
 752 static void DBQueueEventAddCallback(EV_P_ ev_async *w, int revents)
 753 {
 754         CitContext *Ctx;
 755         ev_tstamp Now;
 756         HashList *q;
 757         void *v;
 758         HashPos *It;
 759         long len;
 760         const char *Key;
 761
 762         /* get the control command... */
 763         pthread_mutex_lock(&DBEventQueueMutex);
 764
 765         if (DBInboundEventQueues[0] == DBInboundEventQueue) {
 766                 DBInboundEventQueue = DBInboundEventQueues[1];
 767                 q = DBInboundEventQueues[0];
 768         }
 769         else {
 770                 DBInboundEventQueue = DBInboundEventQueues[0];
 771                 q = DBInboundEventQueues[1];
 772         }
 773         pthread_mutex_unlock(&DBEventQueueMutex);
 774
 775         Now = ev_now (event_db);
 776         It = GetNewHashPos(q, 0);
 777         while (GetNextHashPos(q, It, &len, &Key, &v))
 778         {
 779                 IOAddHandler *h = v;
 780                 eNextState rc;
 781                 if (h->IO->ID == 0)
 782                         h->IO->ID = EvIDSource++;
 783                 if (h->IO->StartDB == 0.0)
 784                         h->IO->StartDB = Now;
 785                 h->IO->Now = Now;
 786
 787                 SetEVState(h->IO, eDBAttach);
 788                 Ctx = h->IO->CitContext;
 789                 become_session(Ctx);
 790                 ev_cleanup_start(event_db, &h->IO->db_abort_by_shutdown);
 791                 rc = h->EvAttch(h->IO);
 792                 switch (rc)
 793                 {
 794                 case eAbort:
 795                         ShutDownDBCLient(h->IO);
 796                 default:
 797                         break;
 798                 }
 799         }
 800         DeleteHashPos(&It);
 801         DeleteHashContent(&q);
 802         EVQM_syslog(LOG_DEBUG, "DBEVENT Q Add done.\n");
 803 }
 804
 805
 806 static void DBEventExitCallback(EV_P_ ev_async *w, int revents)
 807 {
 808         EVQM_syslog(LOG_DEBUG, "DB EVENT Q exiting.\n");
 809         ev_break(event_db, EVBREAK_ALL);
 810 }
 811
 812
 813
 814 void DBInitEventQueue(void)
 815 {
 816         pthread_mutex_init(&DBEventQueueMutex, NULL);
 817         pthread_mutex_init(&DBEventExitQueueMutex, NULL);
 818
 819         DBQueueEvents = NewHash(1, Flathash);
 820         DBInboundEventQueues[0] = NewHash(1, Flathash);
 821         DBInboundEventQueues[1] = NewHash(1, Flathash);
 822         DBInboundEventQueue = DBInboundEventQueues[0];
 823 }
 824
 825 /*
 826  * this thread operates writing to the message database via libev.
 827  */
 828 void *db_event_thread(void *arg)
 829 {
 830         ev_loop *tmp;
 831         struct CitContext libev_msg_CC;
 832
 833         CtdlFillSystemContext(&libev_msg_CC, "LibEv DB IO Thread");
 834
 835         EVQM_syslog(LOG_DEBUG, "dbevent_thread() initializing\n");
 836
 837         tmp = event_db = ev_loop_new (EVFLAG_AUTO);
 838
 839         ev_async_init(&DBAddJob, DBQueueEventAddCallback);
 840         ev_async_start(event_db, &DBAddJob);
 841         ev_async_init(&DBExitEventLoop, DBEventExitCallback);
 842         ev_async_start(event_db, &DBExitEventLoop);
 843
 844         ev_run (event_db, 0);
 845
 846         pthread_mutex_lock(&DBEventExitQueueMutex);
 847
 848         event_db = NULL;
 849         EVQM_syslog(LOG_INFO, "dbevent_thread() exiting\n");
 850
 851         DeleteHash(&DBQueueEvents);
 852         DBInboundEventQueue = NULL;
 853         DeleteHash(&DBInboundEventQueues[0]);
 854         DeleteHash(&DBInboundEventQueues[1]);
 855
 856 /*      citthread_mutex_destroy(&DBEventQueueMutex); TODO */
 857
 858         ev_loop_destroy (tmp);
 859         pthread_mutex_unlock(&DBEventExitQueueMutex);
 860         return(NULL);
 861 }
 862
 863 void ShutDownEventQueues(void)
 864 {
 865         EVQM_syslog(LOG_DEBUG, "EVENT Qs triggering exits.\n");
 866
 867         pthread_mutex_lock(&DBEventQueueMutex);
 868         ev_async_send (event_db, &DBExitEventLoop);
 869         pthread_mutex_unlock(&DBEventQueueMutex);
 870
 871         pthread_mutex_lock(&EventQueueMutex);
 872         ev_async_send (EV_DEFAULT_ &ExitEventLoop);
 873         pthread_mutex_unlock(&EventQueueMutex);
 874 }
 875
 876 void DebugEventloopEnable(const int n)
 877 {
 878         DebugEventLoop = n;
 879 }
 880 void DebugEventloopBacktraceEnable(const int n)
 881 {
 882         DebugEventLoopBacktrace = n;
 883 }
 884
 885 void DebugCurlEnable(const int n)
 886 {
 887         DebugCurl = n;
 888 }
 889
 890 CTDL_MODULE_INIT(event_client)
 891 {
 892         if (!threading)
 893         {
 894                 CtdlRegisterDebugFlagHook(HKEY("eventloop"), DebugEventloopEnable, &DebugEventLoop);
 895                 CtdlRegisterDebugFlagHook(HKEY("eventloopbacktrace"), DebugEventloopBacktraceEnable, &DebugEventLoopBacktrace);
 896                 CtdlRegisterDebugFlagHook(HKEY("curl"), DebugCurlEnable, &DebugCurl);
 897                 InitEventQueue();
 898                 DBInitEventQueue();
 899                 CtdlThreadCreate(client_event_thread);
 900                 CtdlThreadCreate(db_event_thread);
 901         }
 902         return "event";
 903 }