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         syslog(LOG_DEBUG, "EVENT Q: %s\n", __FUNCTION__);
  73
  74         AsyncIO *IO = watcher->data;
  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         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         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         syslog(LOG_DEBUG, "DBEVENT\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         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             ShutDownDBCLient(IO);
 158         }
 159 }
 160
 161 eNextState NextDBOperation(AsyncIO *IO, IO_CallBack CB)
 162 {
 163         IO->NextDBOperation = CB;
 164         ev_idle_init(&IO->db_unwind_stack,
 165                      DB_PerformNext);
 166         IO->db_unwind_stack.data = IO;
 167         ev_idle_start(event_db, &IO->db_unwind_stack);
 168         return eDBQuery;
 169 }
 170
 171 /*--------------------------------------------------------------------------------
 172  * Client IO
 173  */
 174 extern int evbase_count;
 175 extern pthread_mutex_t EventQueueMutex;
 176 extern HashList *InboundEventQueue;
 177 extern struct ev_loop *event_base;
 178 extern ev_async AddJob;
 179 extern ev_async ExitEventLoop;
 180
 181
 182 eNextState QueueEventContext(AsyncIO *IO, IO_CallBack CB)
 183 {
 184         IOAddHandler *h;
 185         int i;
 186
 187         h = (IOAddHandler*)malloc(sizeof(IOAddHandler));
 188         h->IO = IO;
 189         h->EvAttch = CB;
 190         ev_cleanup_init(&IO->abort_by_shutdown,
 191                         IO_abort_shutdown_callback);
 192         IO->abort_by_shutdown.data = IO;
 193         ev_cleanup_start(event_base, &IO->abort_by_shutdown);
 194
 195         pthread_mutex_lock(&EventQueueMutex);
 196         syslog(LOG_DEBUG, "EVENT Q\n");
 197         i = ++evbase_count;
 198         Put(InboundEventQueue, IKEY(i), h, NULL);
 199         pthread_mutex_unlock(&EventQueueMutex);
 200
 201         ev_async_send (event_base, &AddJob);
 202         syslog(LOG_DEBUG, "EVENT Q Done.\n");
 203         return eSendReply;
 204 }
 205
 206 int ShutDownEventQueue(void)
 207 {
 208         pthread_mutex_lock(&DBEventQueueMutex);
 209         ev_async_send (event_db, &DBExitEventLoop);
 210         pthread_mutex_unlock(&DBEventQueueMutex);
 211
 212         pthread_mutex_lock(&EventQueueMutex);
 213         ev_async_send (EV_DEFAULT_ &ExitEventLoop);
 214         pthread_mutex_unlock(&EventQueueMutex);
 215         return 0;
 216 }
 217
 218 void FreeAsyncIOContents(AsyncIO *IO)
 219 {
 220         FreeStrBuf(&IO->IOBuf);
 221         FreeStrBuf(&IO->SendBuf.Buf);
 222         FreeStrBuf(&IO->RecvBuf.Buf);
 223 }
 224
 225
 226 void StopClientWatchers(AsyncIO *IO)
 227 {
 228         ev_timer_stop(event_base, &IO->conn_fail);
 229         ev_io_stop(event_base, &IO->conn_event);
 230         ev_idle_stop(event_base, &IO->unwind_stack);
 231
 232         ev_io_stop(event_base, &IO->send_event);
 233         ev_io_stop(event_base, &IO->recv_event);
 234         ev_timer_stop (event_base, &IO->rw_timeout);
 235         close(IO->SendBuf.fd);
 236         IO->SendBuf.fd = 0;
 237         IO->RecvBuf.fd = 0;
 238 }
 239
 240 void ShutDownCLient(AsyncIO *IO)
 241 {
 242         CitContext *Ctx =IO->CitContext;
 243         become_session(Ctx);
 244
 245         syslog(LOG_DEBUG, "EVENT x %d\n", IO->SendBuf.fd);
 246
 247         ev_cleanup_stop(event_base, &IO->abort_by_shutdown);
 248         StopClientWatchers(IO);
 249
 250         if (IO->DNSChannel != NULL) {
 251                 ares_destroy(IO->DNSChannel);
 252                 ev_io_stop(event_base, &IO->dns_recv_event);
 253                 ev_io_stop(event_base, &IO->dns_send_event);
 254                 IO->DNSChannel = NULL;
 255         }
 256         assert(IO->Terminate);
 257         IO->Terminate(IO);
 258         Ctx->state = CON_IDLE;
 259         Ctx->kill_me = 1;
 260 }
 261
 262
 263 eReadState HandleInbound(AsyncIO *IO)
 264 {
 265         const char *Err = NULL;
 266         eReadState Finished = eBufferNotEmpty;
 267
 268         become_session(IO->CitContext);
 269
 270         while ((Finished == eBufferNotEmpty) &&
 271                ((IO->NextState == eReadMessage)||
 272                 (IO->NextState == eReadMore)||
 273                 (IO->NextState == eReadFile)||
 274                 (IO->NextState == eReadPayload)))
 275         {
 276                 if (IO->RecvBuf.nBlobBytesWanted != 0) {
 277
 278                 }
 279                 else { /* Reading lines... */
 280 //// lex line reply in callback, or do it ourselves. as nnn-blabla means continue reading in SMTP
 281                         if ((IO->NextState == eReadFile) &&
 282                             (Finished == eBufferNotEmpty))
 283                         {
 284                                 Finished = WriteIOBAlreadyRead(&IO->IOB, &Err);
 285                                 if (Finished == eReadSuccess)
 286                                 {
 287                                         IO->NextState = eSendReply;
 288                                 }
 289                         }
 290                         else if (IO->LineReader)
 291                                 Finished = IO->LineReader(IO);
 292                         else
 293                                 Finished = StrBufChunkSipLine(IO->IOBuf, &IO->RecvBuf);
 294
 295                         switch (Finished) {
 296                         case eMustReadMore: /// read new from socket...
 297                                 break;
 298                         case eBufferNotEmpty: /* shouldn't happen... */
 299                         case eReadSuccess: /// done for now...
 300                                 break;
 301                         case eReadFail: /// WHUT?
 302                                 ///todo: shut down!
 303                                 break;
 304                         }
 305
 306                 }
 307
 308                 if (Finished != eMustReadMore) {
 309                         assert(IO->ReadDone);
 310                         ev_io_stop(event_base, &IO->recv_event);
 311                         IO->NextState = IO->ReadDone(IO);
 312                         Finished = StrBufCheckBuffer(&IO->RecvBuf);
 313                 }
 314         }
 315
 316         switch (IO->NextState) {
 317         case eSendFile:
 318                 ev_io_start(event_base, &IO->send_event);
 319                 break;
 320         case eSendReply:
 321         case eSendMore:
 322                 assert(IO->SendDone);
 323                 IO->NextState = IO->SendDone(IO);
 324                 ev_io_start(event_base, &IO->send_event);
 325                 break;
 326         case eReadPayload:
 327         case eReadMore:
 328         case eReadFile:
 329                 ev_io_start(event_base, &IO->recv_event);
 330                 break;
 331         case eTerminateConnection:
 332 //////TODOxxxx
 333                 break;
 334         case eAbort:
 335                 ShutDownCLient(IO);
 336                 break;
 337         case eSendDNSQuery:
 338         case eReadDNSReply:
 339         case eDBQuery:
 340         case eConnect:
 341         case eReadMessage:
 342                 break;
 343         }
 344         return Finished;
 345 }
 346
 347
 348 static void
 349 IO_send_callback(struct ev_loop *loop, ev_io *watcher, int revents)
 350 {
 351         int rc;
 352         AsyncIO *IO = watcher->data;
 353         const char *errmsg = NULL;
 354
 355         become_session(IO->CitContext);
 356 #ifdef BIGBAD_IODBG
 357         {
 358                 int rv = 0;
 359                 char fn [SIZ];
 360                 FILE *fd;
 361                 const char *pch = ChrPtr(IO->SendBuf.Buf);
 362                 const char *pchh = IO->SendBuf.ReadWritePointer;
 363                 long nbytes;
 364
 365                 if (pchh == NULL)
 366                         pchh = pch;
 367
 368                 nbytes = StrLength(IO->SendBuf.Buf) - (pchh - pch);
 369                 snprintf(fn, SIZ, "/tmp/foolog_ev_%s.%d",
 370                          ((CitContext*)(IO->CitContext))->ServiceName,
 371                          IO->SendBuf.fd);
 372
 373                 fd = fopen(fn, "a+");
 374                 fprintf(fd, "Send: BufSize: %ld BufContent: [",
 375                         nbytes);
 376                 rv = fwrite(pchh, nbytes, 1, fd);
 377                 if (!rv) printf("failed to write debug to %s!\n", fn);
 378                 fprintf(fd, "]\n");
 379 #endif
 380                 switch (IO->NextState) {
 381                 case eSendFile:
 382                         rc = FileSendChunked(&IO->IOB, &errmsg);
 383                         if (rc < 0)
 384                                 StrBufPlain(IO->ErrMsg, errmsg, -1);
 385                         break;
 386                 default:
 387                         rc = StrBuf_write_one_chunk_callback(watcher->fd, 0/*TODO*/, &IO->SendBuf);
 388                 }
 389
 390 #ifdef BIGBAD_IODBG
 391                 fprintf(fd, "Sent: BufSize: %d bytes.\n", rc);
 392                 fclose(fd);
 393         }
 394 #endif
 395         if (rc == 0)
 396         {
 397                 ev_io_stop(event_base, &IO->send_event);
 398                 switch (IO->NextState) {
 399                 case eSendMore:
 400                         assert(IO->SendDone);
 401                         IO->NextState = IO->SendDone(IO);
 402
 403                         if ((IO->NextState == eTerminateConnection) ||
 404                             (IO->NextState == eAbort) )
 405                                 ShutDownCLient(IO);
 406                         else {
 407                                 ev_io_start(event_base, &IO->send_event);
 408                         }
 409                         break;
 410                 case eSendFile:
 411                         if (IO->IOB.ChunkSendRemain > 0) {
 412                                 ev_io_start(event_base, &IO->recv_event);
 413                         } else {
 414                                 assert(IO->ReadDone);
 415                                 IO->NextState = IO->ReadDone(IO);
 416                                 switch(IO->NextState) {
 417                                 case eSendDNSQuery:
 418                                 case eReadDNSReply:
 419                                 case eDBQuery:
 420                                 case eConnect:
 421                                         break;
 422                                 case eSendReply:
 423                                 case eSendMore:
 424                                 case eSendFile:
 425                                         ev_io_start(event_base, &IO->send_event);
 426                                         break;
 427                                 case eReadMessage:
 428                                 case eReadMore:
 429                                 case eReadPayload:
 430                                 case eReadFile:
 431                                         break;
 432                                 case eTerminateConnection:
 433                                 case eAbort:
 434                                         break;
 435                                 }
 436                         }
 437                         break;
 438                 case eSendReply:
 439                     if (StrBufCheckBuffer(&IO->SendBuf) != eReadSuccess)
 440                         break;
 441                     IO->NextState = eReadMore;
 442                 case eReadMore:
 443                 case eReadMessage:
 444                 case eReadPayload:
 445                 case eReadFile:
 446                         if (StrBufCheckBuffer(&IO->RecvBuf) == eBufferNotEmpty) {
 447                                 HandleInbound(IO);
 448                         }
 449                         else {
 450                                 ev_io_start(event_base, &IO->recv_event);
 451                         }
 452
 453                         break;
 454                 case eDBQuery:
 455                         /* we now live in another queue, so we have to unregister. */
 456                         ev_cleanup_stop(loop, &IO->abort_by_shutdown);
 457                         break;
 458                 case eSendDNSQuery:
 459                 case eReadDNSReply:
 460                 case eConnect:
 461                 case eTerminateConnection:
 462                 case eAbort:
 463                         break;
 464                 }
 465         }
 466         else if (rc < 0) {
 467                 assert(IO->Timeout);
 468                 IO->Timeout(IO);
 469         }
 470         /* else : must write more. */
 471 }
 472 static void
 473 set_start_callback(struct ev_loop *loop, AsyncIO *IO, int revents)
 474 {
 475
 476         switch(IO->NextState) {
 477         case eReadMore:
 478         case eReadMessage:
 479         case eReadFile:
 480                 ev_io_start(event_base, &IO->recv_event);
 481                 break;
 482         case eSendReply:
 483         case eSendMore:
 484         case eReadPayload:
 485         case eSendFile:
 486                 become_session(IO->CitContext);
 487                 IO_send_callback(loop, &IO->send_event, revents);
 488                 break;
 489         case eDBQuery:
 490         case eSendDNSQuery:
 491         case eReadDNSReply:
 492         case eConnect:
 493         case eTerminateConnection:
 494         case eAbort:
 495                 /// TODO: WHUT?
 496                 break;
 497         }
 498 }
 499
 500 static void
 501 IO_Timeout_callback(struct ev_loop *loop, ev_timer *watcher, int revents)
 502 {
 503         AsyncIO *IO = watcher->data;
 504
 505         ev_timer_stop (event_base, &IO->rw_timeout);
 506         become_session(IO->CitContext);
 507
 508         if (IO->SendBuf.fd != 0)
 509         {
 510                 ev_io_stop(event_base, &IO->send_event);
 511                 ev_io_stop(event_base, &IO->recv_event);
 512                 ev_timer_stop (event_base, &IO->rw_timeout);
 513                 close(IO->SendBuf.fd);
 514                 IO->SendBuf.fd = IO->RecvBuf.fd = 0;
 515         }
 516
 517         assert(IO->Timeout);
 518         switch (IO->Timeout(IO))
 519         {
 520         case eAbort:
 521                 ShutDownCLient(IO);
 522         default:
 523                 break;
 524         }
 525 }
 526
 527 static void
 528 IO_connfail_callback(struct ev_loop *loop, ev_timer *watcher, int revents)
 529 {
 530         AsyncIO *IO = watcher->data;
 531
 532         ev_timer_stop (event_base, &IO->conn_fail);
 533
 534         if (IO->SendBuf.fd != 0)
 535         {
 536                 ev_io_stop(loop, &IO->conn_event);
 537                 ev_io_stop(event_base, &IO->send_event);
 538                 ev_io_stop(event_base, &IO->recv_event);
 539                 ev_timer_stop (event_base, &IO->rw_timeout);
 540                 close(IO->SendBuf.fd);
 541                 IO->SendBuf.fd = IO->RecvBuf.fd = 0;
 542         }
 543         become_session(IO->CitContext);
 544
 545         assert(IO->ConnFail);
 546         switch (IO->ConnFail(IO))
 547         {
 548         case eAbort:
 549                 ShutDownCLient(IO);
 550         default:
 551                 break;
 552
 553         }
 554 }
 555
 556 static void
 557 IO_connfailimmediate_callback(struct ev_loop *loop, ev_idle *watcher, int revents)
 558 {
 559         AsyncIO *IO = watcher->data;
 560
 561         ev_idle_stop (event_base, &IO->conn_fail_immediate);
 562
 563         if (IO->SendBuf.fd != 0)
 564         {
 565                 close(IO->SendBuf.fd);
 566                 IO->SendBuf.fd = IO->RecvBuf.fd = 0;
 567         }
 568         become_session(IO->CitContext);
 569
 570         assert(IO->ConnFail);
 571         switch (IO->ConnFail(IO))
 572         {
 573         case eAbort:
 574                 ShutDownCLient(IO);
 575         default:
 576                 break;
 577
 578         }
 579 }
 580
 581 static void
 582 IO_connestd_callback(struct ev_loop *loop, ev_io *watcher, int revents)
 583 {
 584         AsyncIO *IO = watcher->data;
 585
 586         ev_io_stop(loop, &IO->conn_event);
 587         ev_timer_stop (event_base, &IO->conn_fail);
 588         set_start_callback(loop, IO, revents);
 589 }
 590 static void
 591 IO_recv_callback(struct ev_loop *loop, ev_io *watcher, int revents)
 592 {
 593         const char *errmsg;
 594         ssize_t nbytes;
 595         AsyncIO *IO = watcher->data;
 596
 597         switch (IO->NextState) {
 598         case eReadFile:
 599                 nbytes = FileRecvChunked(&IO->IOB, &errmsg);
 600                 if (nbytes < 0)
 601                         StrBufPlain(IO->ErrMsg, errmsg, -1);
 602                 else
 603                 {
 604                         if (IO->IOB.ChunkSendRemain == 0)
 605                         {
 606                                 IO->NextState = eSendReply;
 607                         }
 608                         else
 609                                 return;
 610                 }
 611                 break;
 612         default:
 613                 nbytes = StrBuf_read_one_chunk_callback(watcher->fd, 0 /*TODO */, &IO->RecvBuf);
 614                 break;
 615         }
 616
 617 #ifdef BIGBAD_IODBG
 618         {
 619                 int rv = 0;
 620                 char fn [SIZ];
 621                 FILE *fd;
 622                 const char *pch = ChrPtr(IO->RecvBuf.Buf);
 623                 const char *pchh = IO->RecvBuf.ReadWritePointer;
 624                 long nbytes;
 625
 626                 if (pchh == NULL)
 627                         pchh = pch;
 628
 629                 nbytes = StrLength(IO->RecvBuf.Buf) - (pchh - pch);
 630                 snprintf(fn, SIZ, "/tmp/foolog_ev_%s.%d",
 631                          ((CitContext*)(IO->CitContext))->ServiceName,
 632                          IO->SendBuf.fd);
 633
 634                 fd = fopen(fn, "a+");
 635                 fprintf(fd, "Read: BufSize: %ld BufContent: [",
 636                         nbytes);
 637                 rv = fwrite(pchh, nbytes, 1, fd);
 638                 if (!rv) printf("failed to write debug to %s!\n", fn);
 639                 fprintf(fd, "]\n");
 640
 641
 642                 fclose(fd);
 643         }
 644 #endif
 645         if (nbytes > 0) {
 646                 HandleInbound(IO);
 647         } else if (nbytes == 0) {
 648                 assert(IO->Timeout);
 649
 650                 switch (IO->Timeout(IO))
 651                 {
 652                 case eAbort:
 653                         ShutDownCLient(IO);
 654                 default:
 655                         break;
 656                 }
 657                 return;
 658         } else if (nbytes == -1) {
 659 /// TODO: FD is gone. kick it.        sock_buff_invoke_free(sb, errno);
 660                 syslog(LOG_DEBUG,
 661                        "EVENT: Socket Invalid! %s \n",
 662                        strerror(errno));
 663                 ShutDownCLient(IO);
 664                 return;
 665         }
 666 }
 667
 668 void
 669 IO_postdns_callback(struct ev_loop *loop, ev_idle *watcher, int revents)
 670 {
 671         AsyncIO *IO = watcher->data;
 672         syslog(LOG_DEBUG, "event: %s\n", __FUNCTION__);
 673         become_session(IO->CitContext);
 674         assert(IO->DNSFail);
 675         assert(IO->DNSQuery->PostDNS);
 676         switch (IO->DNSQuery->PostDNS(IO))
 677         {
 678         case eAbort:
 679                 IO->DNSFail(IO);
 680         default:
 681             break;
 682         }
 683 }
 684
 685 eNextState event_connect_socket(AsyncIO *IO, double conn_timeout, double first_rw_timeout)
 686 {
 687         int fdflags;
 688         int rc = -1;
 689
 690         IO->SendBuf.fd = IO->RecvBuf.fd =
 691                 socket(
 692                         (IO->ConnectMe->IPv6)?PF_INET6:PF_INET,
 693                         SOCK_STREAM,
 694                         IPPROTO_TCP);
 695
 696         if (IO->SendBuf.fd < 0) {
 697                 syslog(LOG_ERR, "EVENT: socket() failed: %s\n", strerror(errno));
 698                 StrBufPrintf(IO->ErrMsg, "Failed to create socket: %s", strerror(errno));
 699                 return eAbort;
 700         }
 701         fdflags = fcntl(IO->SendBuf.fd, F_GETFL);
 702         if (fdflags < 0) {
 703                 syslog(LOG_DEBUG,
 704                        "EVENT: unable to get socket flags! %s \n",
 705                        strerror(errno));
 706                 StrBufPrintf(IO->ErrMsg, "Failed to get socket flags: %s", strerror(errno));
 707                 return eAbort;
 708         }
 709         fdflags = fdflags | O_NONBLOCK;
 710         if (fcntl(IO->SendBuf.fd, F_SETFL, fdflags) < 0) {
 711                 syslog(LOG_DEBUG,
 712                        "EVENT: unable to set socket nonblocking flags! %s \n",
 713                        strerror(errno));
 714                 StrBufPrintf(IO->ErrMsg, "Failed to set socket flags: %s", strerror(errno));
 715                 close(IO->SendBuf.fd);
 716                 IO->SendBuf.fd = IO->RecvBuf.fd = -1;
 717                 return eAbort;
 718         }
 719 /* TODO: maye we could use offsetof() to calc the position of data...
 720  * http://doc.dvgu.ru/devel/ev.html#associating_custom_data_with_a_watcher
 721  */
 722         ev_io_init(&IO->recv_event, IO_recv_callback, IO->RecvBuf.fd, EV_READ);
 723         IO->recv_event.data = IO;
 724         ev_io_init(&IO->send_event, IO_send_callback, IO->SendBuf.fd, EV_WRITE);
 725         IO->send_event.data = IO;
 726
 727         ev_timer_init(&IO->conn_fail, IO_connfail_callback, conn_timeout, 0);
 728         IO->conn_fail.data = IO;
 729         ev_timer_init(&IO->rw_timeout, IO_Timeout_callback, first_rw_timeout, 0);
 730         IO->rw_timeout.data = IO;
 731
 732
 733         /*  Bypass it like this: IO->Addr.sin_addr.s_addr = inet_addr("127.0.0.1"); */
 734 ///     ((struct sockaddr_in)IO->ConnectMe->Addr).sin_addr.s_addr = inet_addr("127.0.0.1");
 735         if (IO->ConnectMe->IPv6)
 736                 rc = connect(IO->SendBuf.fd, &IO->ConnectMe->Addr, sizeof(struct sockaddr_in6));
 737         else
 738                 rc = connect(IO->SendBuf.fd, (struct sockaddr_in *)&IO->ConnectMe->Addr, sizeof(struct sockaddr_in));
 739
 740         if (rc >= 0){
 741                 syslog(LOG_DEBUG, "connect() immediate success.\n");
 742                 set_start_callback(event_base, IO, 0);
 743                 ev_timer_start(event_base, &IO->rw_timeout);
 744                 return IO->NextState;
 745         }
 746         else if (errno == EINPROGRESS) {
 747                 syslog(LOG_DEBUG, "connect() have to wait now.\n");
 748
 749                 ev_io_init(&IO->conn_event, IO_connestd_callback, IO->SendBuf.fd, EV_READ|EV_WRITE);
 750                 IO->conn_event.data = IO;
 751
 752                 ev_io_start(event_base, &IO->conn_event);
 753                 ev_timer_start(event_base, &IO->conn_fail);
 754                 return IO->NextState;
 755         }
 756         else {
 757                 ev_idle_init(&IO->conn_fail_immediate,
 758                              IO_connfailimmediate_callback);
 759                 IO->conn_fail_immediate.data = IO;
 760                 ev_idle_start(event_base, &IO->conn_fail_immediate);
 761
 762                 syslog(LOG_ERR, "connect() failed: %s\n", strerror(errno));
 763                 StrBufPrintf(IO->ErrMsg, "Failed to connect: %s", strerror(errno));
 764                 return IO->NextState;
 765         }
 766         return IO->NextState;
 767 }
 768
 769 void SetNextTimeout(AsyncIO *IO, double timeout)
 770 {
 771         IO->rw_timeout.repeat = timeout;
 772         ev_timer_again (event_base,  &IO->rw_timeout);
 773 }
 774
 775 eNextState InitEventIO(AsyncIO *IO,
 776                        void *pData,
 777                        double conn_timeout,
 778                        double first_rw_timeout,
 779                        int ReadFirst)
 780 {
 781         IO->Data = pData;
 782         become_session(IO->CitContext);
 783
 784         if (ReadFirst) {
 785                 IO->NextState = eReadMessage;
 786         }
 787         else {
 788                 IO->NextState = eSendReply;
 789         }
 790         return event_connect_socket(IO, conn_timeout, first_rw_timeout);
 791 }
 792
 793 eNextState ReAttachIO(AsyncIO *IO,
 794                       void *pData,
 795                       int ReadFirst)
 796 {
 797         IO->Data = pData;
 798         become_session(IO->CitContext);
 799         ev_cleanup_start(event_base, &IO->abort_by_shutdown);
 800         if (ReadFirst) {
 801                 IO->NextState = eReadMessage;
 802         }
 803         else {
 804                 IO->NextState = eSendReply;
 805         }
 806         set_start_callback(event_base, IO, 0);
 807
 808         return IO->NextState;
 809 }