citadel/event_client.c

   1 /*
   2  *
   3  * Copyright (c) 1998-2009 by the citadel.org team
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  */
  19
  20 #include "sysdep.h"
  21 #include <stdlib.h>
  22 #include <unistd.h>
  23 #include <stdio.h>
  24 #include <termios.h>
  25 #include <fcntl.h>
  26 #include <signal.h>
  27 #include <pwd.h>
  28 #include <errno.h>
  29 #include <sys/types.h>
  30 #include <syslog.h>
  31
  32 #if TIME_WITH_SYS_TIME
  33 # include <sys/time.h>
  34 # include <time.h>
  35 #else
  36 # if HAVE_SYS_TIME_H
  37 #  include <sys/time.h>
  38 # else
  39 #  include <time.h>
  40 # endif
  41 #endif
  42 #include <sys/wait.h>
  43 #include <ctype.h>
  44 #include <string.h>
  45 #include <limits.h>
  46 #include <sys/socket.h>
  47 #include <netinet/in.h>
  48 #include <arpa/inet.h>
  49 #include <assert.h>
  50
  51 #include <libcitadel.h>
  52 #include "citadel.h"
  53 #include "server.h"
  54 #include "citserver.h"
  55 #include "support.h"
  56 #include "config.h"
  57 #include "control.h"
  58 #include "user_ops.h"
  59 #include "database.h"
  60 #include "msgbase.h"
  61 #include "internet_addressing.h"
  62 #include "genstamp.h"
  63 #include "domain.h"
  64 #include "clientsocket.h"
  65 #include "locate_host.h"
  66 #include "citadel_dirs.h"
  67
  68 #include "event_client.h"
  69
  70 static void IO_abort_shutdown_callback(struct ev_loop *loop, ev_cleanup *watcher, int revents)
  71 {
  72         AsyncIO *IO = watcher->data;
  73         EV_syslog(LOG_DEBUG, "EVENT Q: %s\n", __FUNCTION__);
  74
  75         assert(IO->ShutdownAbort);
  76         IO->ShutdownAbort(IO);
  77 }
  78
  79
  80 /*--------------------------------------------------------------------------------
  81  * Server DB IO
  82  */
  83 extern int evdb_count;
  84 extern pthread_mutex_t DBEventQueueMutex;
  85 extern HashList *DBInboundEventQueue;
  86 extern struct ev_loop *event_db;
  87 extern ev_async DBAddJob;
  88 extern ev_async DBExitEventLoop;
  89
  90 eNextState QueueDBOperation(AsyncIO *IO, IO_CallBack CB)
  91 {
  92         IOAddHandler *h;
  93         int i;
  94
  95         h = (IOAddHandler*)malloc(sizeof(IOAddHandler));
  96         h->IO = IO;
  97         h->EvAttch = CB;
  98         ev_cleanup_init(&IO->db_abort_by_shutdown,
  99                         IO_abort_shutdown_callback);
 100         IO->db_abort_by_shutdown.data = IO;
 101         ev_cleanup_start(event_db, &IO->db_abort_by_shutdown);
 102
 103         pthread_mutex_lock(&DBEventQueueMutex);
 104         EVM_syslog(LOG_DEBUG, "DBEVENT Q\n");
 105         i = ++evdb_count ;
 106         Put(DBInboundEventQueue, IKEY(i), h, NULL);
 107         pthread_mutex_unlock(&DBEventQueueMutex);
 108
 109         ev_async_send (event_db, &DBAddJob);
 110         EVM_syslog(LOG_DEBUG, "DBEVENT Q Done.\n");
 111         return eDBQuery;
 112 }
 113
 114 void ShutDownDBCLient(AsyncIO *IO)
 115 {
 116         CitContext *Ctx =IO->CitContext;
 117         become_session(Ctx);
 118
 119         EVM_syslog(LOG_DEBUG, "DBEVENT Terminating.\n");
 120         ev_cleanup_stop(event_db, &IO->db_abort_by_shutdown);
 121
 122         assert(IO->Terminate);
 123         IO->Terminate(IO);
 124
 125         Ctx->state = CON_IDLE;
 126         Ctx->kill_me = 1;
 127 }
 128
 129 void
 130 DB_PerformNext(struct ev_loop *loop, ev_idle *watcher, int revents)
 131 {
 132         AsyncIO *IO = watcher->data;
 133         EV_syslog(LOG_DEBUG, "event: %s\n", __FUNCTION__);
 134         become_session(IO->CitContext);
 135
 136         ev_idle_stop(event_db, &IO->db_unwind_stack);
 137
 138         assert(IO->NextDBOperation);
 139         switch (IO->NextDBOperation(IO))
 140         {
 141         case eDBQuery:
 142                 break;
 143         case eSendDNSQuery:
 144         case eReadDNSReply:
 145         case eConnect:
 146         case eSendReply:
 147         case eSendMore:
 148         case eSendFile:
 149         case eReadMessage:
 150         case eReadMore:
 151         case eReadPayload:
 152         case eReadFile:
 153                 ev_cleanup_stop(loop, &IO->db_abort_by_shutdown);
 154                 break;
 155         case eTerminateConnection:
 156         case eAbort:
 157                 ev_idle_stop(event_db, &IO->db_unwind_stack);
 158                 ev_cleanup_stop(loop, &IO->db_abort_by_shutdown);
 159                 ShutDownDBCLient(IO);
 160         }
 161 }
 162
 163 eNextState NextDBOperation(AsyncIO *IO, IO_CallBack CB)
 164 {
 165         IO->NextDBOperation = CB;
 166         ev_idle_init(&IO->db_unwind_stack,
 167                      DB_PerformNext);
 168         IO->db_unwind_stack.data = IO;
 169         ev_idle_start(event_db, &IO->db_unwind_stack);
 170         return eDBQuery;
 171 }
 172
 173 /*--------------------------------------------------------------------------------
 174  * Client IO
 175  */
 176 extern int evbase_count;
 177 extern pthread_mutex_t EventQueueMutex;
 178 extern HashList *InboundEventQueue;
 179 extern struct ev_loop *event_base;
 180 extern ev_async AddJob;
 181 extern ev_async ExitEventLoop;
 182
 183
 184 eNextState QueueEventContext(AsyncIO *IO, IO_CallBack CB)
 185 {
 186         IOAddHandler *h;
 187         int i;
 188
 189         h = (IOAddHandler*)malloc(sizeof(IOAddHandler));
 190         h->IO = IO;
 191         h->EvAttch = CB;
 192         ev_cleanup_init(&IO->abort_by_shutdown,
 193                         IO_abort_shutdown_callback);
 194         IO->abort_by_shutdown.data = IO;
 195         ev_cleanup_start(event_base, &IO->abort_by_shutdown);
 196
 197         pthread_mutex_lock(&EventQueueMutex);
 198         EVM_syslog(LOG_DEBUG, "EVENT Q\n");
 199         i = ++evbase_count;
 200         Put(InboundEventQueue, IKEY(i), h, NULL);
 201         pthread_mutex_unlock(&EventQueueMutex);
 202
 203         ev_async_send (event_base, &AddJob);
 204         EVM_syslog(LOG_DEBUG, "EVENT Q Done.\n");
 205         return eSendReply;
 206 }
 207
 208 extern eNextState evcurl_handle_start(AsyncIO *IO);
 209
 210 eNextState QueueCurlContext(AsyncIO *IO)
 211 {
 212         IOAddHandler *h;
 213         int i;
 214
 215         h = (IOAddHandler*)malloc(sizeof(IOAddHandler));
 216         h->IO = IO;
 217         h->EvAttch = evcurl_handle_start;
 218
 219         pthread_mutex_lock(&EventQueueMutex);
 220         EVM_syslog(LOG_DEBUG, "EVENT Q\n");
 221         i = ++evbase_count;
 222         Put(InboundEventQueue, IKEY(i), h, NULL);
 223         pthread_mutex_unlock(&EventQueueMutex);
 224
 225         ev_async_send (event_base, &AddJob);
 226         EVM_syslog(LOG_DEBUG, "EVENT Q Done.\n");
 227         return eSendReply;
 228 }
 229
 230 int ShutDownEventQueue(void)
 231 {
 232         pthread_mutex_lock(&DBEventQueueMutex);
 233         ev_async_send (event_db, &DBExitEventLoop);
 234         pthread_mutex_unlock(&DBEventQueueMutex);
 235
 236         pthread_mutex_lock(&EventQueueMutex);
 237         ev_async_send (EV_DEFAULT_ &ExitEventLoop);
 238         pthread_mutex_unlock(&EventQueueMutex);
 239         return 0;
 240 }
 241
 242 void FreeAsyncIOContents(AsyncIO *IO)
 243 {
 244         FreeStrBuf(&IO->IOBuf);
 245         FreeStrBuf(&IO->SendBuf.Buf);
 246         FreeStrBuf(&IO->RecvBuf.Buf);
 247 }
 248
 249
 250 void StopClientWatchers(AsyncIO *IO)
 251 {
 252         ev_timer_stop(event_base, &IO->conn_fail);
 253         ev_io_stop(event_base, &IO->conn_event);
 254         ev_idle_stop(event_base, &IO->unwind_stack);
 255
 256         ev_io_stop(event_base, &IO->send_event);
 257         ev_io_stop(event_base, &IO->recv_event);
 258         ev_timer_stop (event_base, &IO->rw_timeout);
 259         close(IO->SendBuf.fd);
 260         IO->SendBuf.fd = 0;
 261         IO->RecvBuf.fd = 0;
 262 }
 263
 264 void ShutDownCLient(AsyncIO *IO)
 265 {
 266         CitContext *Ctx =IO->CitContext;
 267         become_session(Ctx);
 268
 269         EVM_syslog(LOG_DEBUG, "EVENT Terminating \n");
 270
 271         ev_cleanup_stop(event_base, &IO->abort_by_shutdown);
 272         StopClientWatchers(IO);
 273
 274         if (IO->DNSChannel != NULL) {
 275                 ares_destroy(IO->DNSChannel);
 276                 ev_io_stop(event_base, &IO->dns_recv_event);
 277                 ev_io_stop(event_base, &IO->dns_send_event);
 278                 IO->DNSChannel = NULL;
 279         }
 280         assert(IO->Terminate);
 281         IO->Terminate(IO);
 282         Ctx->state = CON_IDLE;
 283         Ctx->kill_me = 1;
 284 }
 285
 286
 287 eReadState HandleInbound(AsyncIO *IO)
 288 {
 289         const char *Err = NULL;
 290         eReadState Finished = eBufferNotEmpty;
 291
 292         become_session(IO->CitContext);
 293
 294         while ((Finished == eBufferNotEmpty) &&
 295                ((IO->NextState == eReadMessage)||
 296                 (IO->NextState == eReadMore)||
 297                 (IO->NextState == eReadFile)||
 298                 (IO->NextState == eReadPayload)))
 299         {
 300                 if (IO->RecvBuf.nBlobBytesWanted != 0) {
 301
 302                 }
 303                 else { /* Reading lines... */
 304 //// lex line reply in callback, or do it ourselves. as nnn-blabla means continue reading in SMTP
 305                         if ((IO->NextState == eReadFile) &&
 306                             (Finished == eBufferNotEmpty))
 307                         {
 308                                 Finished = WriteIOBAlreadyRead(&IO->IOB, &Err);
 309                                 if (Finished == eReadSuccess)
 310                                 {
 311                                         IO->NextState = eSendReply;
 312                                 }
 313                         }
 314                         else if (IO->LineReader)
 315                                 Finished = IO->LineReader(IO);
 316                         else
 317                                 Finished = StrBufChunkSipLine(IO->IOBuf, &IO->RecvBuf);
 318
 319                         switch (Finished) {
 320                         case eMustReadMore: /// read new from socket...
 321                                 break;
 322                         case eBufferNotEmpty: /* shouldn't happen... */
 323                         case eReadSuccess: /// done for now...
 324                                 break;
 325                         case eReadFail: /// WHUT?
 326                                 ///todo: shut down!
 327                                 break;
 328                         }
 329
 330                 }
 331
 332                 if (Finished != eMustReadMore) {
 333                         assert(IO->ReadDone);
 334                         ev_io_stop(event_base, &IO->recv_event);
 335                         IO->NextState = IO->ReadDone(IO);
 336                         Finished = StrBufCheckBuffer(&IO->RecvBuf);
 337                 }
 338         }
 339
 340         switch (IO->NextState) {
 341         case eSendFile:
 342                 ev_io_start(event_base, &IO->send_event);
 343                 break;
 344         case eSendReply:
 345         case eSendMore:
 346                 assert(IO->SendDone);
 347                 IO->NextState = IO->SendDone(IO);
 348                 ev_io_start(event_base, &IO->send_event);
 349                 break;
 350         case eReadPayload:
 351         case eReadMore:
 352         case eReadFile:
 353                 ev_io_start(event_base, &IO->recv_event);
 354                 break;
 355         case eTerminateConnection:
 356 //////TODOxxxx
 357                 break;
 358         case eAbort:
 359                 ShutDownCLient(IO);
 360                 break;
 361         case eSendDNSQuery:
 362         case eReadDNSReply:
 363         case eDBQuery:
 364         case eConnect:
 365         case eReadMessage:
 366                 break;
 367         }
 368         return Finished;
 369 }
 370
 371
 372 static void
 373 IO_send_callback(struct ev_loop *loop, ev_io *watcher, int revents)
 374 {
 375         int rc;
 376         AsyncIO *IO = watcher->data;
 377         const char *errmsg = NULL;
 378
 379         become_session(IO->CitContext);
 380 #ifdef BIGBAD_IODBG
 381         {
 382                 int rv = 0;
 383                 char fn [SIZ];
 384                 FILE *fd;
 385                 const char *pch = ChrPtr(IO->SendBuf.Buf);
 386                 const char *pchh = IO->SendBuf.ReadWritePointer;
 387                 long nbytes;
 388
 389                 if (pchh == NULL)
 390                         pchh = pch;
 391
 392                 nbytes = StrLength(IO->SendBuf.Buf) - (pchh - pch);
 393                 snprintf(fn, SIZ, "/tmp/foolog_ev_%s.%d",
 394                          ((CitContext*)(IO->CitContext))->ServiceName,
 395                          IO->SendBuf.fd);
 396
 397                 fd = fopen(fn, "a+");
 398                 fprintf(fd, "Send: BufSize: %ld BufContent: [",
 399                         nbytes);
 400                 rv = fwrite(pchh, nbytes, 1, fd);
 401                 if (!rv) printf("failed to write debug to %s!\n", fn);
 402                 fprintf(fd, "]\n");
 403 #endif
 404                 switch (IO->NextState) {
 405                 case eSendFile:
 406                         rc = FileSendChunked(&IO->IOB, &errmsg);
 407                         if (rc < 0)
 408                                 StrBufPlain(IO->ErrMsg, errmsg, -1);
 409                         break;
 410                 default:
 411                         rc = StrBuf_write_one_chunk_callback(watcher->fd, 0/*TODO*/, &IO->SendBuf);
 412                 }
 413
 414 #ifdef BIGBAD_IODBG
 415                 fprintf(fd, "Sent: BufSize: %d bytes.\n", rc);
 416                 fclose(fd);
 417         }
 418 #endif
 419         if (rc == 0)
 420         {
 421                 ev_io_stop(event_base, &IO->send_event);
 422                 switch (IO->NextState) {
 423                 case eSendMore:
 424                         assert(IO->SendDone);
 425                         IO->NextState = IO->SendDone(IO);
 426
 427                         if ((IO->NextState == eTerminateConnection) ||
 428                             (IO->NextState == eAbort) )
 429                                 ShutDownCLient(IO);
 430                         else {
 431                                 ev_io_start(event_base, &IO->send_event);
 432                         }
 433                         break;
 434                 case eSendFile:
 435                         if (IO->IOB.ChunkSendRemain > 0) {
 436                                 ev_io_start(event_base, &IO->recv_event);
 437                         } else {
 438                                 assert(IO->ReadDone);
 439                                 IO->NextState = IO->ReadDone(IO);
 440                                 switch(IO->NextState) {
 441                                 case eSendDNSQuery:
 442                                 case eReadDNSReply:
 443                                 case eDBQuery:
 444                                 case eConnect:
 445                                         break;
 446                                 case eSendReply:
 447                                 case eSendMore:
 448                                 case eSendFile:
 449                                         ev_io_start(event_base, &IO->send_event);
 450                                         break;
 451                                 case eReadMessage:
 452                                 case eReadMore:
 453                                 case eReadPayload:
 454                                 case eReadFile:
 455                                         break;
 456                                 case eTerminateConnection:
 457                                 case eAbort:
 458                                         break;
 459                                 }
 460                         }
 461                         break;
 462                 case eSendReply:
 463                     if (StrBufCheckBuffer(&IO->SendBuf) != eReadSuccess)
 464                         break;
 465                     IO->NextState = eReadMore;
 466                 case eReadMore:
 467                 case eReadMessage:
 468                 case eReadPayload:
 469                 case eReadFile:
 470                         if (StrBufCheckBuffer(&IO->RecvBuf) == eBufferNotEmpty) {
 471                                 HandleInbound(IO);
 472                         }
 473                         else {
 474                                 ev_io_start(event_base, &IO->recv_event);
 475                         }
 476
 477                         break;
 478                 case eDBQuery:
 479                         /* we now live in another queue, so we have to unregister. */
 480                         ev_cleanup_stop(loop, &IO->abort_by_shutdown);
 481                         break;
 482                 case eSendDNSQuery:
 483                 case eReadDNSReply:
 484                 case eConnect:
 485                 case eTerminateConnection:
 486                 case eAbort:
 487                         break;
 488                 }
 489         }
 490         else if (rc < 0) {
 491                 assert(IO->Timeout);
 492                 IO->Timeout(IO);
 493         }
 494         /* else : must write more. */
 495 }
 496 static void
 497 set_start_callback(struct ev_loop *loop, AsyncIO *IO, int revents)
 498 {
 499
 500         switch(IO->NextState) {
 501         case eReadMore:
 502         case eReadMessage:
 503         case eReadFile:
 504                 ev_io_start(event_base, &IO->recv_event);
 505                 break;
 506         case eSendReply:
 507         case eSendMore:
 508         case eReadPayload:
 509         case eSendFile:
 510                 become_session(IO->CitContext);
 511                 IO_send_callback(loop, &IO->send_event, revents);
 512                 break;
 513         case eDBQuery:
 514         case eSendDNSQuery:
 515         case eReadDNSReply:
 516         case eConnect:
 517         case eTerminateConnection:
 518         case eAbort:
 519                 /// TODO: WHUT?
 520                 break;
 521         }
 522 }
 523
 524 static void
 525 IO_Timeout_callback(struct ev_loop *loop, ev_timer *watcher, int revents)
 526 {
 527         AsyncIO *IO = watcher->data;
 528
 529         ev_timer_stop (event_base, &IO->rw_timeout);
 530         become_session(IO->CitContext);
 531
 532         if (IO->SendBuf.fd != 0)
 533         {
 534                 ev_io_stop(event_base, &IO->send_event);
 535                 ev_io_stop(event_base, &IO->recv_event);
 536                 ev_timer_stop (event_base, &IO->rw_timeout);
 537                 close(IO->SendBuf.fd);
 538                 IO->SendBuf.fd = IO->RecvBuf.fd = 0;
 539         }
 540
 541         assert(IO->Timeout);
 542         switch (IO->Timeout(IO))
 543         {
 544         case eAbort:
 545                 ShutDownCLient(IO);
 546         default:
 547                 break;
 548         }
 549 }
 550
 551 static void
 552 IO_connfail_callback(struct ev_loop *loop, ev_timer *watcher, int revents)
 553 {
 554         AsyncIO *IO = watcher->data;
 555
 556         ev_timer_stop (event_base, &IO->conn_fail);
 557
 558         if (IO->SendBuf.fd != 0)
 559         {
 560                 ev_io_stop(loop, &IO->conn_event);
 561                 ev_io_stop(event_base, &IO->send_event);
 562                 ev_io_stop(event_base, &IO->recv_event);
 563                 ev_timer_stop (event_base, &IO->rw_timeout);
 564                 close(IO->SendBuf.fd);
 565                 IO->SendBuf.fd = IO->RecvBuf.fd = 0;
 566         }
 567         become_session(IO->CitContext);
 568
 569         assert(IO->ConnFail);
 570         switch (IO->ConnFail(IO))
 571         {
 572         case eAbort:
 573                 ShutDownCLient(IO);
 574         default:
 575                 break;
 576
 577         }
 578 }
 579
 580 static void
 581 IO_connfailimmediate_callback(struct ev_loop *loop, ev_idle *watcher, int revents)
 582 {
 583         AsyncIO *IO = watcher->data;
 584
 585         ev_idle_stop (event_base, &IO->conn_fail_immediate);
 586
 587         if (IO->SendBuf.fd != 0)
 588         {
 589                 close(IO->SendBuf.fd);
 590                 IO->SendBuf.fd = IO->RecvBuf.fd = 0;
 591         }
 592         become_session(IO->CitContext);
 593
 594         assert(IO->ConnFail);
 595         switch (IO->ConnFail(IO))
 596         {
 597         case eAbort:
 598                 ShutDownCLient(IO);
 599         default:
 600                 break;
 601
 602         }
 603 }
 604
 605 static void
 606 IO_connestd_callback(struct ev_loop *loop, ev_io *watcher, int revents)
 607 {
 608         AsyncIO *IO = watcher->data;
 609
 610         ev_io_stop(loop, &IO->conn_event);
 611         ev_timer_stop (event_base, &IO->conn_fail);
 612         set_start_callback(loop, IO, revents);
 613 }
 614 static void
 615 IO_recv_callback(struct ev_loop *loop, ev_io *watcher, int revents)
 616 {
 617         const char *errmsg;
 618         ssize_t nbytes;
 619         AsyncIO *IO = watcher->data;
 620
 621         switch (IO->NextState) {
 622         case eReadFile:
 623                 nbytes = FileRecvChunked(&IO->IOB, &errmsg);
 624                 if (nbytes < 0)
 625                         StrBufPlain(IO->ErrMsg, errmsg, -1);
 626                 else
 627                 {
 628                         if (IO->IOB.ChunkSendRemain == 0)
 629                         {
 630                                 IO->NextState = eSendReply;
 631                         }
 632                         else
 633                                 return;
 634                 }
 635                 break;
 636         default:
 637                 nbytes = StrBuf_read_one_chunk_callback(watcher->fd, 0 /*TODO */, &IO->RecvBuf);
 638                 break;
 639         }
 640
 641 #ifdef BIGBAD_IODBG
 642         {
 643                 int rv = 0;
 644                 char fn [SIZ];
 645                 FILE *fd;
 646                 const char *pch = ChrPtr(IO->RecvBuf.Buf);
 647                 const char *pchh = IO->RecvBuf.ReadWritePointer;
 648                 long nbytes;
 649
 650                 if (pchh == NULL)
 651                         pchh = pch;
 652
 653                 nbytes = StrLength(IO->RecvBuf.Buf) - (pchh - pch);
 654                 snprintf(fn, SIZ, "/tmp/foolog_ev_%s.%d",
 655                          ((CitContext*)(IO->CitContext))->ServiceName,
 656                          IO->SendBuf.fd);
 657
 658                 fd = fopen(fn, "a+");
 659                 fprintf(fd, "Read: BufSize: %ld BufContent: [",
 660                         nbytes);
 661                 rv = fwrite(pchh, nbytes, 1, fd);
 662                 if (!rv) printf("failed to write debug to %s!\n", fn);
 663                 fprintf(fd, "]\n");
 664
 665
 666                 fclose(fd);
 667         }
 668 #endif
 669         if (nbytes > 0) {
 670                 HandleInbound(IO);
 671         } else if (nbytes == 0) {
 672                 assert(IO->Timeout);
 673
 674                 switch (IO->Timeout(IO))
 675                 {
 676                 case eAbort:
 677                         ShutDownCLient(IO);
 678                 default:
 679                         break;
 680                 }
 681                 return;
 682         } else if (nbytes == -1) {
 683 /// TODO: FD is gone. kick it.        sock_buff_invoke_free(sb, errno);
 684                 EV_syslog(LOG_DEBUG,
 685                           "EVENT: Socket Invalid! %s \n",
 686                           strerror(errno));
 687                 ShutDownCLient(IO);
 688                 return;
 689         }
 690 }
 691
 692 void
 693 IO_postdns_callback(struct ev_loop *loop, ev_idle *watcher, int revents)
 694 {
 695         AsyncIO *IO = watcher->data;
 696         EV_syslog(LOG_DEBUG, "event: %s\n", __FUNCTION__);
 697         become_session(IO->CitContext);
 698         assert(IO->DNSFail);
 699         assert(IO->DNSQuery->PostDNS);
 700         switch (IO->DNSQuery->PostDNS(IO))
 701         {
 702         case eAbort:
 703                 IO->DNSFail(IO);
 704         default:
 705             break;
 706         }
 707 }
 708
 709 eNextState event_connect_socket(AsyncIO *IO, double conn_timeout, double first_rw_timeout)
 710 {
 711         int fdflags;
 712         int rc = -1;
 713
 714         IO->SendBuf.fd = IO->RecvBuf.fd =
 715                 socket(
 716                         (IO->ConnectMe->IPv6)?PF_INET6:PF_INET,
 717                         SOCK_STREAM,
 718                         IPPROTO_TCP);
 719
 720         if (IO->SendBuf.fd < 0) {
 721                 EV_syslog(LOG_ERR, "EVENT: socket() failed: %s\n", strerror(errno));
 722                 StrBufPrintf(IO->ErrMsg, "Failed to create socket: %s", strerror(errno));
 723                 return eAbort;
 724         }
 725         fdflags = fcntl(IO->SendBuf.fd, F_GETFL);
 726         if (fdflags < 0) {
 727                 EV_syslog(LOG_DEBUG,
 728                           "EVENT: unable to get socket flags! %s \n",
 729                           strerror(errno));
 730                 StrBufPrintf(IO->ErrMsg, "Failed to get socket flags: %s", strerror(errno));
 731                 return eAbort;
 732         }
 733         fdflags = fdflags | O_NONBLOCK;
 734         if (fcntl(IO->SendBuf.fd, F_SETFL, fdflags) < 0) {
 735                 EV_syslog(LOG_DEBUG,
 736                           "EVENT: unable to set socket nonblocking flags! %s \n",
 737                           strerror(errno));
 738                 StrBufPrintf(IO->ErrMsg, "Failed to set socket flags: %s", strerror(errno));
 739                 close(IO->SendBuf.fd);
 740                 IO->SendBuf.fd = IO->RecvBuf.fd = -1;
 741                 return eAbort;
 742         }
 743 /* TODO: maye we could use offsetof() to calc the position of data...
 744  * http://doc.dvgu.ru/devel/ev.html#associating_custom_data_with_a_watcher
 745  */
 746         ev_io_init(&IO->recv_event, IO_recv_callback, IO->RecvBuf.fd, EV_READ);
 747         IO->recv_event.data = IO;
 748         ev_io_init(&IO->send_event, IO_send_callback, IO->SendBuf.fd, EV_WRITE);
 749         IO->send_event.data = IO;
 750
 751         ev_timer_init(&IO->conn_fail, IO_connfail_callback, conn_timeout, 0);
 752         IO->conn_fail.data = IO;
 753         ev_timer_init(&IO->rw_timeout, IO_Timeout_callback, first_rw_timeout, 0);
 754         IO->rw_timeout.data = IO;
 755
 756
 757         /*  Bypass it like this: IO->Addr.sin_addr.s_addr = inet_addr("127.0.0.1"); */
 758 ///     ((struct sockaddr_in)IO->ConnectMe->Addr).sin_addr.s_addr = inet_addr("127.0.0.1");
 759         if (IO->ConnectMe->IPv6)
 760                 rc = connect(IO->SendBuf.fd, &IO->ConnectMe->Addr, sizeof(struct sockaddr_in6));
 761         else
 762                 rc = connect(IO->SendBuf.fd, (struct sockaddr_in *)&IO->ConnectMe->Addr, sizeof(struct sockaddr_in));
 763
 764         if (rc >= 0){
 765                 EVM_syslog(LOG_DEBUG, "connect() immediate success.\n");
 766                 set_start_callback(event_base, IO, 0);
 767                 ev_timer_start(event_base, &IO->rw_timeout);
 768                 return IO->NextState;
 769         }
 770         else if (errno == EINPROGRESS) {
 771                 EVM_syslog(LOG_DEBUG, "connect() have to wait now.\n");
 772
 773                 ev_io_init(&IO->conn_event, IO_connestd_callback, IO->SendBuf.fd, EV_READ|EV_WRITE);
 774                 IO->conn_event.data = IO;
 775
 776                 ev_io_start(event_base, &IO->conn_event);
 777                 ev_timer_start(event_base, &IO->conn_fail);
 778                 return IO->NextState;
 779         }
 780         else {
 781                 ev_idle_init(&IO->conn_fail_immediate,
 782                              IO_connfailimmediate_callback);
 783                 IO->conn_fail_immediate.data = IO;
 784                 ev_idle_start(event_base, &IO->conn_fail_immediate);
 785
 786                 EV_syslog(LOG_ERR, "connect() failed: %s\n", strerror(errno));
 787                 StrBufPrintf(IO->ErrMsg, "Failed to connect: %s", strerror(errno));
 788                 return IO->NextState;
 789         }
 790         return IO->NextState;
 791 }
 792
 793 void SetNextTimeout(AsyncIO *IO, double timeout)
 794 {
 795         IO->rw_timeout.repeat = timeout;
 796         ev_timer_again (event_base,  &IO->rw_timeout);
 797 }
 798
 799 eNextState InitEventIO(AsyncIO *IO,
 800                        void *pData,
 801                        double conn_timeout,
 802                        double first_rw_timeout,
 803                        int ReadFirst)
 804 {
 805         IO->Data = pData;
 806         become_session(IO->CitContext);
 807
 808         if (ReadFirst) {
 809                 IO->NextState = eReadMessage;
 810         }
 811         else {
 812                 IO->NextState = eSendReply;
 813         }
 814         return event_connect_socket(IO, conn_timeout, first_rw_timeout);
 815 }
 816
 817 eNextState ReAttachIO(AsyncIO *IO,
 818                       void *pData,
 819                       int ReadFirst)
 820 {
 821         IO->Data = pData;
 822         become_session(IO->CitContext);
 823         ev_cleanup_start(event_base, &IO->abort_by_shutdown);
 824         if (ReadFirst) {
 825                 IO->NextState = eReadMessage;
 826         }
 827         else {
 828                 IO->NextState = eSendReply;
 829         }
 830         set_start_callback(event_base, IO, 0);
 831
 832         return IO->NextState;
 833 }