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