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 pthread_key_t evConKey;
  67
  68 long EvIDSource = 1;
  69 /*****************************************************************************
  70  *                   libevent / curl integration                             *
  71  *****************************************************************************/
  72 #define DBGLOG(LEVEL) if ((LEVEL != LOG_DEBUG) || (DebugCurl != 0))
  73
  74 #define EVCURL_syslog(LEVEL, FORMAT, ...)                               \
  75         DBGLOG (LEVEL) syslog(LEVEL, "EVCURL:%s[%ld]CC[%d] " FORMAT,    \
  76                               IOSTR, IO->ID, CCID, __VA_ARGS__)
  77
  78 #define EVCURLM_syslog(LEVEL, FORMAT)                                   \
  79         DBGLOG (LEVEL) syslog(LEVEL, "EVCURL:%s[%ld]CC[%d] " FORMAT,    \
  80                               IOSTR, IO->ID, CCID)
  81
  82 #define CURL_syslog(LEVEL, FORMAT, ...)                                 \
  83         DBGLOG (LEVEL) syslog(LEVEL, "CURL: " FORMAT, __VA_ARGS__)
  84
  85 #define CURLM_syslog(LEVEL, FORMAT)                     \
  86         DBGLOG (LEVEL) syslog(LEVEL, "CURL: " FORMAT)
  87
  88 #define MOPT(s, v)                                                      \
  89         do {                                                            \
  90                 sta = curl_multi_setopt(mhnd, (CURLMOPT_##s), (v));     \
  91                 if (sta) {                                              \
  92                         EVQ_syslog(LOG_ERR, "error setting option "     \
  93                                #s " on curl multi handle: %s\n",        \
  94                                curl_easy_strerror(sta));                \
  95                         exit (1);                                       \
  96                 }                                                       \
  97         } while (0)
  98
  99
 100 typedef struct _evcurl_global_data {
 101         int magic;
 102         CURLM *mhnd;
 103         ev_timer timeev;
 104         int nrun;
 105 } evcurl_global_data;
 106
 107 ev_async WakeupCurl;
 108 evcurl_global_data global;
 109
 110 eNextState QueueAnDBOperation(AsyncIO *IO);
 111
 112 static void
 113 gotstatus(int nnrun)
 114 {
 115         CURLMsg *msg;
 116         int nmsg;
 117
 118         global.nrun = nnrun;
 119
 120         CURLM_syslog(LOG_DEBUG,
 121                      "gotstatus(): about to call curl_multi_info_read\n");
 122         while ((msg = curl_multi_info_read(global.mhnd, &nmsg))) {
 123                 CURL_syslog(LOG_DEBUG,
 124                             "got curl multi_info message msg=%d\n",
 125                             msg->msg);
 126
 127                 if (CURLMSG_DONE == msg->msg) {
 128                         CURL *chnd;
 129                         char *chandle = NULL;
 130                         CURLcode sta;
 131                         CURLMcode msta;
 132                         AsyncIO*IO;
 133
 134                         chandle = NULL;;
 135                         chnd = msg->easy_handle;
 136                         sta = curl_easy_getinfo(chnd,
 137                                                 CURLINFO_PRIVATE,
 138                                                 &chandle);
 139                         if (sta) {
 140                                 syslog(LOG_ERR,
 141                                        "error asking curl for private"
 142                                        " cookie of curl handle: %s\n",
 143                                        curl_easy_strerror(sta));
 144                                 continue;
 145                         }
 146                         IO = (AsyncIO *)chandle;
 147                         if (IO->ID == 0) {
 148                                 EVCURL_syslog(LOG_ERR,
 149                                               "Error, invalid IO context %p\n",
 150                                               IO);
 151                                 continue;
 152                         }
 153                         SetEVState(IO, eCurlGotStatus);
 154
 155                         EVCURLM_syslog(LOG_DEBUG, "request complete\n");
 156
 157                         IO->Now = ev_now(event_base);
 158
 159                         ev_io_stop(event_base, &IO->recv_event);
 160                         ev_io_stop(event_base, &IO->send_event);
 161
 162                         sta = msg->data.result;
 163                         if (sta) {
 164                                 EVCURL_syslog(LOG_ERR,
 165                                               "error description: %s\n",
 166                                               IO->HttpReq.errdesc);
 167                                 IO->HttpReq.CurlError = curl_easy_strerror(sta);
 168                                 EVCURL_syslog(LOG_ERR,
 169                                               "error performing request: %s\n",
 170                                               IO->HttpReq.CurlError);
 171                                 if (sta == CURLE_OPERATION_TIMEDOUT)
 172                                 {
 173                                         IO->SendBuf.fd = 0;
 174                                         IO->RecvBuf.fd = 0;
 175                                 }
 176                         }
 177                         sta = curl_easy_getinfo(chnd,
 178                                                 CURLINFO_RESPONSE_CODE,
 179                                                 &IO->HttpReq.httpcode);
 180                         if (sta)
 181                                 EVCURL_syslog(LOG_ERR,
 182                                               "error asking curl for "
 183                                               "response code from request: %s\n",
 184                                               curl_easy_strerror(sta));
 185                         EVCURL_syslog(LOG_DEBUG,
 186                                       "http response code was %ld\n",
 187                                       (long)IO->HttpReq.httpcode);
 188
 189
 190                         curl_slist_free_all(IO->HttpReq.headers);
 191                         msta = curl_multi_remove_handle(global.mhnd, chnd);
 192                         if (msta)
 193                                 EVCURL_syslog(LOG_ERR,
 194                                               "warning problem detaching "
 195                                               "completed handle from curl multi: "
 196                                               "%s\n",
 197                                               curl_multi_strerror(msta));
 198
 199                         ev_cleanup_stop(event_base, &IO->abort_by_shutdown);
 200
 201                         IO->HttpReq.attached = 0;
 202                         switch(IO->SendDone(IO))
 203                         {
 204                         case eDBQuery:
 205                                 curl_easy_cleanup(IO->HttpReq.chnd);
 206                                 IO->HttpReq.chnd = NULL;
 207                                 FreeURL(&IO->ConnectMe);
 208                                 QueueAnDBOperation(IO);
 209                                 break;
 210                         case eSendDNSQuery:
 211                         case eReadDNSReply:
 212                         case eConnect:
 213                         case eSendReply:
 214                         case eSendMore:
 215                         case eSendFile:
 216                         case eReadMessage:
 217                         case eReadMore:
 218                         case eReadPayload:
 219                         case eReadFile:
 220                                 break;
 221                         case eTerminateConnection:
 222                         case eAbort:
 223                                 curl_easy_cleanup(IO->HttpReq.chnd);
 224                                 IO->HttpReq.chnd = NULL;
 225                                 FreeStrBuf(&IO->HttpReq.ReplyData);
 226                                 FreeURL(&IO->ConnectMe);
 227                                 RemoveContext(IO->CitContext);
 228                                 IO->Terminate(IO);
 229                         }
 230                 }
 231         }
 232 }
 233
 234 static void
 235 stepmulti(void *data, curl_socket_t fd, int which)
 236 {
 237         int running_handles = 0;
 238         CURLMcode msta;
 239
 240         msta = curl_multi_socket_action(global.mhnd,
 241                                         fd,
 242                                         which,
 243                                         &running_handles);
 244
 245         CURLM_syslog(LOG_DEBUG, "stepmulti(): calling gotstatus()\n");
 246         if (msta)
 247                 CURL_syslog(LOG_ERR,
 248                             "error in curl processing events"
 249                             "on multi handle, fd %d: %s\n",
 250                             (int)fd,
 251                             curl_multi_strerror(msta));
 252
 253         if (global.nrun != running_handles)
 254                 gotstatus(running_handles);
 255 }
 256
 257 static void
 258 gottime(struct ev_loop *loop, ev_timer *timeev, int events)
 259 {
 260         CURLM_syslog(LOG_DEBUG, "EVCURL: waking up curl for timeout\n");
 261         stepmulti(NULL, CURL_SOCKET_TIMEOUT, 0);
 262 }
 263
 264 static void
 265 got_in(struct ev_loop *loop, ev_io *ioev, int events)
 266 {
 267         CURL_syslog(LOG_DEBUG,
 268                     "EVCURL: waking up curl for io on fd %d\n",
 269                     (int)ioev->fd);
 270
 271         stepmulti(ioev->data, ioev->fd, CURL_CSELECT_IN);
 272 }
 273
 274 static void
 275 got_out(struct ev_loop *loop, ev_io *ioev, int events)
 276 {
 277         CURL_syslog(LOG_DEBUG,
 278                     "waking up curl for io on fd %d\n",
 279                     (int)ioev->fd);
 280
 281         stepmulti(ioev->data, ioev->fd, CURL_CSELECT_OUT);
 282 }
 283
 284 static size_t
 285 gotdata(void *data, size_t size, size_t nmemb, void *cglobal)
 286 {
 287         AsyncIO *IO = (AsyncIO*) cglobal;
 288
 289         SetEVState(IO, eCurlGotData);
 290         if (IO->HttpReq.ReplyData == NULL)
 291         {
 292                 IO->HttpReq.ReplyData = NewStrBufPlain(NULL, SIZ);
 293         }
 294         IO->Now = ev_now(event_base);
 295         return CurlFillStrBuf_callback(data,
 296                                        size,
 297                                        nmemb,
 298                                        IO->HttpReq.ReplyData);
 299 }
 300
 301 static int
 302 gotwatchtime(CURLM *multi, long tblock_ms, void *cglobal) {
 303         CURL_syslog(LOG_DEBUG, "EVCURL: gotwatchtime called %ld ms\n", tblock_ms);
 304         evcurl_global_data *global = cglobal;
 305         ev_timer_stop(EV_DEFAULT, &global->timeev);
 306         if (tblock_ms < 0 || 14000 < tblock_ms)
 307                 tblock_ms = 14000;
 308         ev_timer_set(&global->timeev, 0.5e-3 + 1.0e-3 * tblock_ms, 14.0);
 309         ev_timer_start(EV_DEFAULT_UC, &global->timeev);
 310         curl_multi_perform(global, &global->nrun);
 311         return 0;
 312 }
 313
 314 static int
 315 gotwatchsock(CURL *easy,
 316              curl_socket_t fd,
 317              int action,
 318              void *cglobal,
 319              void *vIO)
 320 {
 321         evcurl_global_data *global = cglobal;
 322         CURLM *mhnd = global->mhnd;
 323         char *f;
 324         AsyncIO *IO = (AsyncIO*) vIO;
 325         CURLcode sta;
 326         const char *Action;
 327
 328         if (IO == NULL) {
 329                 sta = curl_easy_getinfo(easy, CURLINFO_PRIVATE, &f);
 330                 if (sta) {
 331                         CURL_syslog(LOG_ERR,
 332                                     "EVCURL: error asking curl for private "
 333                                     "cookie of curl handle: %s\n",
 334                                     curl_easy_strerror(sta));
 335                         return -1;
 336                 }
 337                 IO = (AsyncIO *) f;
 338                 SetEVState(IO, eCurlNewIO);
 339                 EVCURL_syslog(LOG_DEBUG,
 340                               "EVCURL: got socket for URL: %s\n",
 341                               IO->ConnectMe->PlainUrl);
 342
 343                 if (IO->SendBuf.fd != 0)
 344                 {
 345                         ev_io_stop(event_base, &IO->recv_event);
 346                         ev_io_stop(event_base, &IO->send_event);
 347                 }
 348                 IO->SendBuf.fd = fd;
 349                 ev_io_init(&IO->recv_event, &got_in, fd, EV_READ);
 350                 ev_io_init(&IO->send_event, &got_out, fd, EV_WRITE);
 351                 curl_multi_assign(mhnd, fd, IO);
 352         }
 353
 354         SetEVState(IO, eCurlGotIO);
 355         IO->Now = ev_now(event_base);
 356
 357         Action = "";
 358         switch (action)
 359         {
 360         case CURL_POLL_NONE:
 361                 Action = "CURL_POLL_NONE";
 362                 break;
 363         case CURL_POLL_REMOVE:
 364                 Action = "CURL_POLL_REMOVE";
 365                 break;
 366         case CURL_POLL_IN:
 367                 Action = "CURL_POLL_IN";
 368                 break;
 369         case CURL_POLL_OUT:
 370                 Action = "CURL_POLL_OUT";
 371                 break;
 372         case CURL_POLL_INOUT:
 373                 Action = "CURL_POLL_INOUT";
 374                 break;
 375         }
 376
 377
 378         EVCURL_syslog(LOG_DEBUG,
 379                       "EVCURL: gotwatchsock called fd=%d action=%s[%d]\n",
 380                       (int)fd, Action, action);
 381
 382         switch (action)
 383         {
 384         case CURL_POLL_NONE:
 385                 EVCURLM_syslog(LOG_DEBUG,
 386                                "called first time "
 387                                "to register this sockwatcker\n");
 388                 break;
 389         case CURL_POLL_REMOVE:
 390                 EVCURLM_syslog(LOG_DEBUG,
 391                                "called last time to unregister "
 392                                "this sockwatcher\n");
 393                 ev_io_stop(event_base, &IO->recv_event);
 394                 ev_io_stop(event_base, &IO->send_event);
 395                 break;
 396         case CURL_POLL_IN:
 397                 ev_io_start(event_base, &IO->recv_event);
 398                 ev_io_stop(event_base, &IO->send_event);
 399                 break;
 400         case CURL_POLL_OUT:
 401                 ev_io_start(event_base, &IO->send_event);
 402                 ev_io_stop(event_base, &IO->recv_event);
 403                 break;
 404         case CURL_POLL_INOUT:
 405                 ev_io_start(event_base, &IO->send_event);
 406                 ev_io_start(event_base, &IO->recv_event);
 407                 break;
 408         }
 409         return 0;
 410 }
 411
 412 void curl_init_connectionpool(void)
 413 {
 414         CURLM *mhnd ;
 415
 416         ev_timer_init(&global.timeev, &gottime, 14.0, 14.0);
 417         global.timeev.data = (void *)&global;
 418         global.nrun = -1;
 419         CURLcode sta = curl_global_init(CURL_GLOBAL_ALL);
 420
 421         if (sta)
 422         {
 423                 CURL_syslog(LOG_ERR,
 424                             "error initializing curl library: %s\n",
 425                             curl_easy_strerror(sta));
 426
 427                 exit(1);
 428         }
 429         mhnd = global.mhnd = curl_multi_init();
 430         if (!mhnd)
 431         {
 432                 CURLM_syslog(LOG_ERR,
 433                              "error initializing curl multi handle\n");
 434                 exit(3);
 435         }
 436
 437         MOPT(SOCKETFUNCTION, &gotwatchsock);
 438         MOPT(SOCKETDATA, (void *)&global);
 439         MOPT(TIMERFUNCTION, &gotwatchtime);
 440         MOPT(TIMERDATA, (void *)&global);
 441
 442         return;
 443 }
 444
 445 int evcurl_init(AsyncIO *IO)
 446 {
 447         CURLcode sta;
 448         CURL *chnd;
 449
 450         EVCURLM_syslog(LOG_DEBUG, "EVCURL: evcurl_init called ms\n");
 451         IO->HttpReq.attached = 0;
 452         chnd = IO->HttpReq.chnd = curl_easy_init();
 453         if (!chnd)
 454         {
 455                 EVCURLM_syslog(LOG_ERR, "EVCURL: error initializing curl handle\n");
 456                 return 0;
 457         }
 458
 459 #if DEBUG
 460         OPT(VERBOSE, (long)1);
 461 #endif
 462         OPT(NOPROGRESS, 1L);
 463
 464         OPT(NOSIGNAL, 1L);
 465         OPT(FAILONERROR, (long)1);
 466         OPT(ENCODING, "");
 467         OPT(FOLLOWLOCATION, (long)0);
 468         OPT(MAXREDIRS, (long)0);
 469         OPT(USERAGENT, CITADEL);
 470
 471         OPT(TIMEOUT, (long)1800);
 472         OPT(LOW_SPEED_LIMIT, (long)64);
 473         OPT(LOW_SPEED_TIME, (long)600);
 474         OPT(CONNECTTIMEOUT, (long)600);
 475         OPT(PRIVATE, (void *)IO);
 476
 477         OPT(FORBID_REUSE, 1);
 478         OPT(WRITEFUNCTION, &gotdata);
 479         OPT(WRITEDATA, (void *)IO);
 480         OPT(ERRORBUFFER, IO->HttpReq.errdesc);
 481
 482         if ((!IsEmptyStr(config.c_ip_addr))
 483                 && (strcmp(config.c_ip_addr, "*"))
 484                 && (strcmp(config.c_ip_addr, "::"))
 485                 && (strcmp(config.c_ip_addr, "0.0.0.0"))
 486                 )
 487         {
 488                 OPT(INTERFACE, config.c_ip_addr);
 489         }
 490
 491 #ifdef CURLOPT_HTTP_CONTENT_DECODING
 492         OPT(HTTP_CONTENT_DECODING, 1);
 493         OPT(ENCODING, "");
 494 #endif
 495
 496         IO->HttpReq.headers = curl_slist_append(IO->HttpReq.headers,
 497                                                 "Connection: close");
 498
 499         return 1;
 500 }
 501
 502
 503 static void IOcurl_abort_shutdown_callback(struct ev_loop *loop,
 504                                            ev_cleanup *watcher,
 505                                            int revents)
 506 {
 507         CURLMcode msta;
 508         AsyncIO *IO = watcher->data;
 509
 510         if (IO == NULL)
 511                 return;
 512
 513         SetEVState(IO, eCurlShutdown);
 514         IO->Now = ev_now(event_base);
 515         EVCURL_syslog(LOG_DEBUG, "EVENT Curl: %s\n", __FUNCTION__);
 516
 517         curl_slist_free_all(IO->HttpReq.headers);
 518         msta = curl_multi_remove_handle(global.mhnd, IO->HttpReq.chnd);
 519         if (msta)
 520         {
 521                 EVCURL_syslog(LOG_ERR,
 522                               "EVCURL: warning problem detaching completed handle "
 523                               "from curl multi: %s\n",
 524                               curl_multi_strerror(msta));
 525         }
 526
 527         curl_easy_cleanup(IO->HttpReq.chnd);
 528         IO->HttpReq.chnd = NULL;
 529         ev_cleanup_stop(event_base, &IO->abort_by_shutdown);
 530         ev_io_stop(event_base, &IO->recv_event);
 531         ev_io_stop(event_base, &IO->send_event);
 532         assert(IO->ShutdownAbort);
 533         IO->ShutdownAbort(IO);
 534 }
 535 eNextState
 536 evcurl_handle_start(AsyncIO *IO)
 537 {
 538         CURLMcode msta;
 539         CURLcode sta;
 540         CURL *chnd;
 541
 542         SetEVState(IO, eCurlStart);
 543         chnd = IO->HttpReq.chnd;
 544         EVCURL_syslog(LOG_DEBUG,
 545                   "EVCURL: Loading URL: %s\n", IO->ConnectMe->PlainUrl);
 546         OPT(URL, IO->ConnectMe->PlainUrl);
 547         if (StrLength(IO->ConnectMe->CurlCreds))
 548         {
 549                 OPT(HTTPAUTH, (long)CURLAUTH_BASIC);
 550                 OPT(USERPWD, ChrPtr(IO->ConnectMe->CurlCreds));
 551         }
 552         if (StrLength(IO->HttpReq.PostData) > 0)
 553         {
 554                 OPT(POSTFIELDS, ChrPtr(IO->HttpReq.PostData));
 555                 OPT(POSTFIELDSIZE, StrLength(IO->HttpReq.PostData));
 556
 557         }
 558         else if ((IO->HttpReq.PlainPostDataLen != 0) &&
 559                  (IO->HttpReq.PlainPostData != NULL))
 560         {
 561                 OPT(POSTFIELDS, IO->HttpReq.PlainPostData);
 562                 OPT(POSTFIELDSIZE, IO->HttpReq.PlainPostDataLen);
 563         }
 564         OPT(HTTPHEADER, IO->HttpReq.headers);
 565
 566         IO->NextState = eConnect;
 567         EVCURLM_syslog(LOG_DEBUG, "EVCURL: attaching to curl multi handle\n");
 568         msta = curl_multi_add_handle(global.mhnd, IO->HttpReq.chnd);
 569         if (msta)
 570         {
 571                 EVCURL_syslog(LOG_ERR,
 572                           "EVCURL: error attaching to curl multi handle: %s\n",
 573                           curl_multi_strerror(msta));
 574         }
 575
 576         IO->HttpReq.attached = 1;
 577         ev_async_send (event_base, &WakeupCurl);
 578
 579         ev_cleanup_init(&IO->abort_by_shutdown,
 580                         IOcurl_abort_shutdown_callback);
 581
 582         ev_cleanup_start(event_base, &IO->abort_by_shutdown);
 583
 584         return eReadMessage;
 585 }
 586
 587 static void WakeupCurlCallback(EV_P_ ev_async *w, int revents)
 588 {
 589         CURLM_syslog(LOG_DEBUG, "waking up curl multi handle\n");
 590
 591         curl_multi_perform(&global, CURL_POLL_NONE);
 592 }
 593
 594 static void evcurl_shutdown (void)
 595 {
 596         curl_global_cleanup();
 597         curl_multi_cleanup(global.mhnd);
 598         CURLM_syslog(LOG_DEBUG, "exiting\n");
 599 }
 600 /*****************************************************************************
 601  *                       libevent integration                                *
 602  *****************************************************************************/
 603 /*
 604  * client event queue plus its methods.
 605  * this currently is the main loop (which may change in some future?)
 606  */
 607 int evbase_count = 0;
 608 pthread_mutex_t EventQueueMutex; /* locks the access to the following vars: */
 609 pthread_mutex_t EventExitQueueMutex; /* locks the access to the event queue pointer on exit. */
 610 HashList *QueueEvents = NULL;
 611 HashList *InboundEventQueue = NULL;
 612 HashList *InboundEventQueues[2] = { NULL, NULL };
 613 extern void ShutDownCLient(AsyncIO *IO);
 614
 615 ev_async AddJob;
 616 ev_async ExitEventLoop;
 617
 618 static void QueueEventAddCallback(EV_P_ ev_async *w, int revents)
 619 {
 620         CitContext *Ctx;
 621         long IOID = -1;
 622         long count = 0;
 623         ev_tstamp Now;
 624         HashList *q;
 625         void *v;
 626         HashPos*It;
 627         long len;
 628         const char *Key;
 629
 630         /* get the control command... */
 631         pthread_mutex_lock(&EventQueueMutex);
 632
 633         if (InboundEventQueues[0] == InboundEventQueue) {
 634                 InboundEventQueue = InboundEventQueues[1];
 635                 q = InboundEventQueues[0];
 636         }
 637         else {
 638                 InboundEventQueue = InboundEventQueues[0];
 639                 q = InboundEventQueues[1];
 640         }
 641         pthread_mutex_unlock(&EventQueueMutex);
 642         Now = ev_now (event_base);
 643         It = GetNewHashPos(q, 0);
 644         while (GetNextHashPos(q, It, &len, &Key, &v))
 645         {
 646                 IOAddHandler *h = v;
 647                 count ++;
 648                 if (h->IO->ID == 0) {
 649                         h->IO->ID = EvIDSource++;
 650                 }
 651                 IOID = h->IO->ID;
 652                 if (h->IO->StartIO == 0.0)
 653                         h->IO->StartIO = Now;
 654
 655                 SetEVState(h->IO, eIOAttach);
 656
 657                 Ctx = h->IO->CitContext;
 658                 become_session(Ctx);
 659
 660                 h->IO->Now = Now;
 661                 switch (h->EvAttch(h->IO))
 662                 {
 663                 case eReadMore:
 664                 case eReadMessage:
 665                 case eReadFile:
 666                 case eSendReply:
 667                 case eSendMore:
 668                 case eReadPayload:
 669                 case eSendFile:
 670                 case eDBQuery:
 671                 case eSendDNSQuery:
 672                 case eReadDNSReply:
 673                 case eConnect:
 674                         break;
 675                 case eTerminateConnection:
 676                 case eAbort:
 677                         ShutDownCLient(h->IO);
 678                 break;
 679                 }
 680         }
 681         DeleteHashPos(&It);
 682         DeleteHashContent(&q);
 683         EVQ_syslog(LOG_DEBUG, "%s CC[%ld] EVENT Q Add %ld  done.", IOSTR, IOID, count);
 684 }
 685
 686
 687 static void EventExitCallback(EV_P_ ev_async *w, int revents)
 688 {
 689         ev_break(event_base, EVBREAK_ALL);
 690
 691         EVQM_syslog(LOG_DEBUG, "EVENT Q exiting.\n");
 692 }
 693
 694
 695
 696 void InitEventQueue(void)
 697 {
 698         pthread_mutex_init(&EventQueueMutex, NULL);
 699         pthread_mutex_init(&EventExitQueueMutex, NULL);
 700
 701         QueueEvents = NewHash(1, Flathash);
 702         InboundEventQueues[0] = NewHash(1, Flathash);
 703         InboundEventQueues[1] = NewHash(1, Flathash);
 704         InboundEventQueue = InboundEventQueues[0];
 705 }
 706 extern void CtdlDestroyEVCleanupHooks(void);
 707
 708 extern int EVQShutDown;
 709 const char *IOLog = "IO";
 710 /*
 711  * this thread operates the select() etc. via libev.
 712  */
 713 void *client_event_thread(void *arg)
 714 {
 715         struct CitContext libev_client_CC;
 716
 717         CtdlFillSystemContext(&libev_client_CC, "LibEv Thread");
 718
 719         pthread_setspecific(evConKey, IOLog);
 720
 721         EVQM_syslog(LOG_DEBUG, "client_event_thread() initializing\n");
 722
 723         event_base = ev_default_loop (EVFLAG_AUTO);
 724         ev_async_init(&AddJob, QueueEventAddCallback);
 725         ev_async_start(event_base, &AddJob);
 726         ev_async_init(&ExitEventLoop, EventExitCallback);
 727         ev_async_start(event_base, &ExitEventLoop);
 728         ev_async_init(&WakeupCurl, WakeupCurlCallback);
 729         ev_async_start(event_base, &WakeupCurl);
 730
 731         curl_init_connectionpool();
 732
 733         ev_run (event_base, 0);
 734
 735         EVQM_syslog(LOG_DEBUG, "client_event_thread() exiting\n");
 736
 737 ///what todo here?      CtdlClearSystemContext();
 738         pthread_mutex_lock(&EventExitQueueMutex);
 739         ev_loop_destroy (EV_DEFAULT_UC);
 740         event_base = NULL;
 741         DeleteHash(&QueueEvents);
 742         InboundEventQueue = NULL;
 743         DeleteHash(&InboundEventQueues[0]);
 744         DeleteHash(&InboundEventQueues[1]);
 745 /*      citthread_mutex_destroy(&EventQueueMutex); TODO */
 746         evcurl_shutdown();
 747
 748         CtdlDestroyEVCleanupHooks();
 749
 750         pthread_mutex_unlock(&EventExitQueueMutex);
 751         EVQShutDown = 1;
 752         return(NULL);
 753 }
 754
 755 /*----------------------------------------------------------------------------*/
 756 /*
 757  * DB-Queue; does async bdb operations.
 758  * has its own set of handlers.
 759  */
 760 ev_loop *event_db;
 761 int evdb_count = 0;
 762 pthread_mutex_t DBEventQueueMutex; /* locks the access to the following vars: */
 763 pthread_mutex_t DBEventExitQueueMutex; /* locks the access to the db-event queue pointer on exit. */
 764 HashList *DBQueueEvents = NULL;
 765 HashList *DBInboundEventQueue = NULL;
 766 HashList *DBInboundEventQueues[2] = { NULL, NULL };
 767
 768 ev_async DBAddJob;
 769 ev_async DBExitEventLoop;
 770
 771 extern void ShutDownDBCLient(AsyncIO *IO);
 772
 773 static void DBQueueEventAddCallback(EV_P_ ev_async *w, int revents)
 774 {
 775         CitContext *Ctx;
 776         long IOID = -1;
 777         long count = 0;;
 778         ev_tstamp Now;
 779         HashList *q;
 780         void *v;
 781         HashPos *It;
 782         long len;
 783         const char *Key;
 784
 785         /* get the control command... */
 786         pthread_mutex_lock(&DBEventQueueMutex);
 787
 788         if (DBInboundEventQueues[0] == DBInboundEventQueue) {
 789                 DBInboundEventQueue = DBInboundEventQueues[1];
 790                 q = DBInboundEventQueues[0];
 791         }
 792         else {
 793                 DBInboundEventQueue = DBInboundEventQueues[0];
 794                 q = DBInboundEventQueues[1];
 795         }
 796         pthread_mutex_unlock(&DBEventQueueMutex);
 797
 798         Now = ev_now (event_db);
 799         It = GetNewHashPos(q, 0);
 800         while (GetNextHashPos(q, It, &len, &Key, &v))
 801         {
 802                 IOAddHandler *h = v;
 803                 eNextState rc;
 804                 count ++;
 805                 if (h->IO->ID == 0)
 806                         h->IO->ID = EvIDSource++;
 807                 IOID = h->IO->ID;
 808                 if (h->IO->StartDB == 0.0)
 809                         h->IO->StartDB = Now;
 810                 h->IO->Now = Now;
 811
 812                 SetEVState(h->IO, eDBAttach);
 813                 Ctx = h->IO->CitContext;
 814                 become_session(Ctx);
 815                 ev_cleanup_start(event_db, &h->IO->db_abort_by_shutdown);
 816                 rc = h->EvAttch(h->IO);
 817                 switch (rc)
 818                 {
 819                 case eAbort:
 820                         ShutDownDBCLient(h->IO);
 821                 default:
 822                         break;
 823                 }
 824         }
 825         DeleteHashPos(&It);
 826         DeleteHashContent(&q);
 827         EVQ_syslog(LOG_DEBUG, "%s CC[%ld] DBEVENT Q Add %ld done.", IOSTR, IOID, count);
 828 }
 829
 830
 831 static void DBEventExitCallback(EV_P_ ev_async *w, int revents)
 832 {
 833         EVQM_syslog(LOG_DEBUG, "DB EVENT Q exiting.\n");
 834         ev_break(event_db, EVBREAK_ALL);
 835 }
 836
 837
 838
 839 void DBInitEventQueue(void)
 840 {
 841         pthread_mutex_init(&DBEventQueueMutex, NULL);
 842         pthread_mutex_init(&DBEventExitQueueMutex, NULL);
 843
 844         DBQueueEvents = NewHash(1, Flathash);
 845         DBInboundEventQueues[0] = NewHash(1, Flathash);
 846         DBInboundEventQueues[1] = NewHash(1, Flathash);
 847         DBInboundEventQueue = DBInboundEventQueues[0];
 848 }
 849
 850 const char *DBLog = "BD";
 851
 852 /*
 853  * this thread operates writing to the message database via libev.
 854  */
 855 void *db_event_thread(void *arg)
 856 {
 857         ev_loop *tmp;
 858         struct CitContext libev_msg_CC;
 859
 860         pthread_setspecific(evConKey, DBLog);
 861
 862         CtdlFillSystemContext(&libev_msg_CC, "LibEv DB IO Thread");
 863
 864         EVQM_syslog(LOG_DEBUG, "dbevent_thread() initializing\n");
 865
 866         tmp = event_db = ev_loop_new (EVFLAG_AUTO);
 867
 868         ev_async_init(&DBAddJob, DBQueueEventAddCallback);
 869         ev_async_start(event_db, &DBAddJob);
 870         ev_async_init(&DBExitEventLoop, DBEventExitCallback);
 871         ev_async_start(event_db, &DBExitEventLoop);
 872
 873         ev_run (event_db, 0);
 874
 875         pthread_mutex_lock(&DBEventExitQueueMutex);
 876
 877         event_db = NULL;
 878         EVQM_syslog(LOG_INFO, "dbevent_thread() exiting\n");
 879
 880         DeleteHash(&DBQueueEvents);
 881         DBInboundEventQueue = NULL;
 882         DeleteHash(&DBInboundEventQueues[0]);
 883         DeleteHash(&DBInboundEventQueues[1]);
 884
 885 /*      citthread_mutex_destroy(&DBEventQueueMutex); TODO */
 886
 887         ev_loop_destroy (tmp);
 888         pthread_mutex_unlock(&DBEventExitQueueMutex);
 889         return(NULL);
 890 }
 891
 892 void ShutDownEventQueues(void)
 893 {
 894         EVQM_syslog(LOG_DEBUG, "EVENT Qs triggering exits.\n");
 895
 896         pthread_mutex_lock(&DBEventQueueMutex);
 897         ev_async_send (event_db, &DBExitEventLoop);
 898         pthread_mutex_unlock(&DBEventQueueMutex);
 899
 900         pthread_mutex_lock(&EventQueueMutex);
 901         ev_async_send (EV_DEFAULT_ &ExitEventLoop);
 902         pthread_mutex_unlock(&EventQueueMutex);
 903 }
 904
 905 void DebugEventloopEnable(const int n)
 906 {
 907         DebugEventLoop = n;
 908 }
 909 void DebugEventloopBacktraceEnable(const int n)
 910 {
 911         DebugEventLoopBacktrace = n;
 912 }
 913
 914 void DebugCurlEnable(const int n)
 915 {
 916         DebugCurl = n;
 917 }
 918
 919 const char *WLog = "WX";
 920 CTDL_MODULE_INIT(event_client)
 921 {
 922         if (!threading)
 923         {
 924                 if (pthread_key_create(&evConKey, NULL) != 0) {
 925                         syslog(LOG_CRIT, "Can't create TSD key: %s", strerror(errno));
 926                 }
 927                 pthread_setspecific(evConKey, WLog);
 928
 929                 CtdlRegisterDebugFlagHook(HKEY("eventloop"), DebugEventloopEnable, &DebugEventLoop);
 930                 CtdlRegisterDebugFlagHook(HKEY("eventloopbacktrace"), DebugEventloopBacktraceEnable, &DebugEventLoopBacktrace);
 931                 CtdlRegisterDebugFlagHook(HKEY("curl"), DebugCurlEnable, &DebugCurl);
 932                 InitEventQueue();
 933                 DBInitEventQueue();
 934                 CtdlThreadCreate(client_event_thread);
 935                 CtdlThreadCreate(db_event_thread);
 936         }
 937         return "event";
 938 }