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 == eReadPayload)))
 274         {
 275                 if (IO->RecvBuf.nBlobBytesWanted != 0) {
 276
 277                 }
 278                 else { /* Reading lines... */
 279 //// lex line reply in callback, or do it ourselves. as nnn-blabla means continue reading in SMTP
 280                         if (IO->LineReader)
 281                                 Finished = IO->LineReader(IO);
 282                         else
 283                                 Finished = StrBufChunkSipLine(IO->IOBuf, &IO->RecvBuf);
 284
 285                         switch (Finished) {
 286                         case eMustReadMore: /// read new from socket...
 287                                 break;
 288                         case eBufferNotEmpty: /* shouldn't happen... */
 289                         case eReadSuccess: /// done for now...
 290                                 break;
 291                         case eReadFail: /// WHUT?
 292                                 ///todo: shut down!
 293                                 break;
 294                         }
 295
 296                 }
 297
 298                 if (Finished != eMustReadMore) {
 299                         assert(IO->ReadDone);
 300                         ev_io_stop(event_base, &IO->recv_event);
 301                         IO->NextState = IO->ReadDone(IO);
 302                         Finished = StrBufCheckBuffer(&IO->RecvBuf);
 303                         if ((IO->NextState == eReadFile) &&
 304                             (Finished == eBufferNotEmpty))
 305                         {
 306                                 Finished = WriteIOBAlreadyRead(&IO->IOB, &Err);
 307                                 if (Finished == eReadSuccess)
 308                                 {
 309                                         IO->NextState = eSendReply;
 310                                 }
 311                         }
 312                 }
 313         }
 314
 315         switch (IO->NextState) {
 316         case eSendFile:
 317                 ev_io_start(event_base, &IO->send_event);
 318                 break;
 319         case eSendReply:
 320         case eSendMore:
 321                 assert(IO->SendDone);
 322                 IO->NextState = IO->SendDone(IO);
 323                 ev_io_start(event_base, &IO->send_event);
 324                 break;
 325         case eReadPayload:
 326         case eReadMore:
 327         case eReadFile:
 328                 ev_io_start(event_base, &IO->recv_event);
 329                 break;
 330         case eTerminateConnection:
 331 //////TODOxxxx
 332                 break;
 333         case eAbort:
 334                 ShutDownCLient(IO);
 335                 break;
 336         case eSendDNSQuery:
 337         case eReadDNSReply:
 338         case eDBQuery:
 339         case eConnect:
 340         case eReadMessage:
 341                 break;
 342         }
 343         return Finished;
 344 }
 345
 346
 347 static void
 348 IO_send_callback(struct ev_loop *loop, ev_io *watcher, int revents)
 349 {
 350         int rc;
 351         AsyncIO *IO = watcher->data;
 352         const char *errmsg = NULL;
 353
 354         become_session(IO->CitContext);
 355 #ifdef BIGBAD_IODBG
 356         {
 357                 int rv = 0;
 358                 char fn [SIZ];
 359                 FILE *fd;
 360                 const char *pch = ChrPtr(IO->SendBuf.Buf);
 361                 const char *pchh = IO->SendBuf.ReadWritePointer;
 362                 long nbytes;
 363
 364                 if (pchh == NULL)
 365                         pchh = pch;
 366
 367                 nbytes = StrLength(IO->SendBuf.Buf) - (pchh - pch);
 368                 snprintf(fn, SIZ, "/tmp/foolog_ev_%s.%d",
 369                          ((CitContext*)(IO->CitContext))->ServiceName,
 370                          IO->SendBuf.fd);
 371
 372                 fd = fopen(fn, "a+");
 373                 fprintf(fd, "Send: BufSize: %ld BufContent: [",
 374                         nbytes);
 375                 rv = fwrite(pchh, nbytes, 1, fd);
 376                 if (!rv) printf("failed to write debug to %s!\n", fn);
 377                 fprintf(fd, "]\n");
 378 #endif
 379                 switch (IO->NextState) {
 380                 case eSendFile:
 381                         rc = FileSendChunked(&IO->IOB, &errmsg);
 382                         if (rc < 0)
 383                                 StrBufPlain(IO->ErrMsg, errmsg, -1);
 384                         break;
 385                 default:
 386                         rc = StrBuf_write_one_chunk_callback(watcher->fd, 0/*TODO*/, &IO->SendBuf);
 387                 }
 388
 389 #ifdef BIGBAD_IODBG
 390                 fprintf(fd, "Sent: BufSize: %d bytes.\n", rc);
 391                 fclose(fd);
 392         }
 393 #endif
 394         if (rc == 0)
 395         {
 396                 ev_io_stop(event_base, &IO->send_event);
 397                 switch (IO->NextState) {
 398                 case eSendMore:
 399                         assert(IO->SendDone);
 400                         IO->NextState = IO->SendDone(IO);
 401
 402                         if ((IO->NextState == eTerminateConnection) ||
 403                             (IO->NextState == eAbort) )
 404                                 ShutDownCLient(IO);
 405                         else {
 406                                 ev_io_start(event_base, &IO->send_event);
 407                         }
 408                         break;
 409                 case eSendFile:
 410                         if (IO->IOB.ChunkSendRemain > 0) {
 411                                 ev_io_start(event_base, &IO->recv_event);
 412                         } else {
 413                                 assert(IO->ReadDone);
 414                                 IO->NextState = IO->ReadDone(IO);
 415                                 switch(IO->NextState) {
 416                                 case eSendDNSQuery:
 417                                 case eReadDNSReply:
 418                                 case eDBQuery:
 419                                 case eConnect:
 420                                         break;
 421                                 case eSendReply:
 422                                 case eSendMore:
 423                                 case eSendFile:
 424                                         ev_io_start(event_base, &IO->send_event);
 425                                         break;
 426                                 case eReadMessage:
 427                                 case eReadMore:
 428                                 case eReadPayload:
 429                                 case eReadFile:
 430                                         break;
 431                                 case eTerminateConnection:
 432                                 case eAbort:
 433                                         break;
 434                                 }
 435                         }
 436                         break;
 437                 case eSendReply:
 438                     if (StrBufCheckBuffer(&IO->SendBuf) != eReadSuccess)
 439                         break;
 440                     IO->NextState = eReadMore;
 441                 case eReadMore:
 442                 case eReadMessage:
 443                 case eReadPayload:
 444                 case eReadFile:
 445                         if (StrBufCheckBuffer(&IO->RecvBuf) == eBufferNotEmpty) {
 446                                 HandleInbound(IO);
 447                         }
 448                         else {
 449                                 ev_io_start(event_base, &IO->recv_event);
 450                         }
 451
 452                         break;
 453                 case eDBQuery:
 454                         /* we now live in another queue, so we have to unregister. */
 455                         ev_cleanup_stop(loop, &IO->abort_by_shutdown);
 456                         break;
 457                 case eSendDNSQuery:
 458                 case eReadDNSReply:
 459                 case eConnect:
 460                 case eTerminateConnection:
 461                 case eAbort:
 462                         break;
 463                 }
 464         }
 465         else if (rc < 0) {
 466                 assert(IO->Timeout);
 467                 IO->Timeout(IO);
 468         }
 469         /* else : must write more. */
 470 }
 471 static void
 472 set_start_callback(struct ev_loop *loop, AsyncIO *IO, int revents)
 473 {
 474
 475         switch(IO->NextState) {
 476         case eReadMore:
 477         case eReadMessage:
 478         case eReadFile:
 479                 ev_io_start(event_base, &IO->recv_event);
 480                 break;
 481         case eSendReply:
 482         case eSendMore:
 483         case eReadPayload:
 484         case eSendFile:
 485                 become_session(IO->CitContext);
 486                 IO_send_callback(loop, &IO->send_event, revents);
 487                 break;
 488         case eDBQuery:
 489         case eSendDNSQuery:
 490         case eReadDNSReply:
 491         case eConnect:
 492         case eTerminateConnection:
 493         case eAbort:
 494                 /// TODO: WHUT?
 495                 break;
 496         }
 497 }
 498
 499 static void
 500 IO_Timeout_callback(struct ev_loop *loop, ev_timer *watcher, int revents)
 501 {
 502         AsyncIO *IO = watcher->data;
 503
 504         ev_timer_stop (event_base, &IO->rw_timeout);
 505         become_session(IO->CitContext);
 506
 507         if (IO->SendBuf.fd != 0)
 508         {
 509                 ev_io_stop(event_base, &IO->send_event);
 510                 ev_io_stop(event_base, &IO->recv_event);
 511                 ev_timer_stop (event_base, &IO->rw_timeout);
 512                 close(IO->SendBuf.fd);
 513                 IO->SendBuf.fd = IO->RecvBuf.fd = 0;
 514         }
 515
 516         assert(IO->Timeout);
 517         switch (IO->Timeout(IO))
 518         {
 519         case eAbort:
 520                 ShutDownCLient(IO);
 521         default:
 522                 break;
 523         }
 524 }
 525
 526 static void
 527 IO_connfail_callback(struct ev_loop *loop, ev_timer *watcher, int revents)
 528 {
 529         AsyncIO *IO = watcher->data;
 530
 531         ev_timer_stop (event_base, &IO->conn_fail);
 532
 533         if (IO->SendBuf.fd != 0)
 534         {
 535                 ev_io_stop(loop, &IO->conn_event);
 536                 ev_io_stop(event_base, &IO->send_event);
 537                 ev_io_stop(event_base, &IO->recv_event);
 538                 ev_timer_stop (event_base, &IO->rw_timeout);
 539                 close(IO->SendBuf.fd);
 540                 IO->SendBuf.fd = IO->RecvBuf.fd = 0;
 541         }
 542         become_session(IO->CitContext);
 543
 544         assert(IO->ConnFail);
 545         switch (IO->ConnFail(IO))
 546         {
 547         case eAbort:
 548                 ShutDownCLient(IO);
 549         default:
 550                 break;
 551
 552         }
 553 }
 554
 555 static void
 556 IO_connfailimmediate_callback(struct ev_loop *loop, ev_idle *watcher, int revents)
 557 {
 558         AsyncIO *IO = watcher->data;
 559
 560         ev_idle_stop (event_base, &IO->conn_fail_immediate);
 561
 562         if (IO->SendBuf.fd != 0)
 563         {
 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_connestd_callback(struct ev_loop *loop, ev_io *watcher, int revents)
 582 {
 583         AsyncIO *IO = watcher->data;
 584
 585         ev_io_stop(loop, &IO->conn_event);
 586         ev_timer_stop (event_base, &IO->conn_fail);
 587         set_start_callback(loop, IO, revents);
 588 }
 589 static void
 590 IO_recv_callback(struct ev_loop *loop, ev_io *watcher, int revents)
 591 {
 592         const char *errmsg;
 593         long rc;
 594         ssize_t nbytes;
 595         AsyncIO *IO = watcher->data;
 596
 597         switch (IO->NextState) {
 598         case eReadFile:
 599                 rc = FileRecvChunked(&IO->IOB, &errmsg);
 600                 if (rc < 0)
 601                         StrBufPlain(IO->ErrMsg, errmsg, -1);
 602                 break;
 603         default:
 604                 nbytes = StrBuf_read_one_chunk_callback(watcher->fd, 0 /*TODO */, &IO->RecvBuf);
 605                 break;
 606         }
 607 #ifdef BIGBAD_IODBG
 608         {
 609                 int rv = 0;
 610                 char fn [SIZ];
 611                 FILE *fd;
 612                 const char *pch = ChrPtr(IO->RecvBuf.Buf);
 613                 const char *pchh = IO->RecvBuf.ReadWritePointer;
 614                 long nbytes;
 615
 616                 if (pchh == NULL)
 617                         pchh = pch;
 618
 619                 nbytes = StrLength(IO->RecvBuf.Buf) - (pchh - pch);
 620                 snprintf(fn, SIZ, "/tmp/foolog_ev_%s.%d",
 621                          ((CitContext*)(IO->CitContext))->ServiceName,
 622                          IO->SendBuf.fd);
 623
 624                 fd = fopen(fn, "a+");
 625                 fprintf(fd, "Read: BufSize: %ld BufContent: [",
 626                         nbytes);
 627                 rv = fwrite(pchh, nbytes, 1, fd);
 628                 if (!rv) printf("failed to write debug to %s!\n", fn);
 629                 fprintf(fd, "]\n");
 630
 631
 632                 fclose(fd);
 633         }
 634 #endif
 635         if (nbytes > 0) {
 636                 HandleInbound(IO);
 637         } else if (nbytes == 0) {
 638                 assert(IO->Timeout);
 639
 640                 switch (IO->Timeout(IO))
 641                 {
 642                 case eAbort:
 643                         ShutDownCLient(IO);
 644                 default:
 645                         break;
 646                 }
 647                 return;
 648         } else if (nbytes == -1) {
 649 /// TODO: FD is gone. kick it.        sock_buff_invoke_free(sb, errno);
 650                 syslog(LOG_DEBUG,
 651                        "EVENT: Socket Invalid! %s \n",
 652                        strerror(errno));
 653                 return;
 654         }
 655 }
 656
 657 void
 658 IO_postdns_callback(struct ev_loop *loop, ev_idle *watcher, int revents)
 659 {
 660         AsyncIO *IO = watcher->data;
 661         syslog(LOG_DEBUG, "event: %s\n", __FUNCTION__);
 662         become_session(IO->CitContext);
 663         assert(IO->DNSFail);
 664         switch (IO->DNSQuery->PostDNS(IO))
 665         {
 666         case eAbort:
 667                 IO->DNSFail(IO);
 668         default:
 669             break;
 670         }
 671 }
 672
 673 eNextState event_connect_socket(AsyncIO *IO, double conn_timeout, double first_rw_timeout)
 674 {
 675         int fdflags;
 676         int rc = -1;
 677
 678         IO->SendBuf.fd = IO->RecvBuf.fd =
 679                 socket(
 680                         (IO->ConnectMe->IPv6)?PF_INET6:PF_INET,
 681                         SOCK_STREAM,
 682                         IPPROTO_TCP);
 683
 684         if (IO->SendBuf.fd < 0) {
 685                 syslog(LOG_ERR, "EVENT: socket() failed: %s\n", strerror(errno));
 686                 StrBufPrintf(IO->ErrMsg, "Failed to create socket: %s", strerror(errno));
 687                 return eAbort;
 688         }
 689         fdflags = fcntl(IO->SendBuf.fd, F_GETFL);
 690         if (fdflags < 0) {
 691                 syslog(LOG_DEBUG,
 692                        "EVENT: unable to get socket flags! %s \n",
 693                        strerror(errno));
 694                 StrBufPrintf(IO->ErrMsg, "Failed to get socket flags: %s", strerror(errno));
 695                 return eAbort;
 696         }
 697         fdflags = fdflags | O_NONBLOCK;
 698         if (fcntl(IO->SendBuf.fd, F_SETFL, fdflags) < 0) {
 699                 syslog(LOG_DEBUG,
 700                        "EVENT: unable to set socket nonblocking flags! %s \n",
 701                        strerror(errno));
 702                 StrBufPrintf(IO->ErrMsg, "Failed to set socket flags: %s", strerror(errno));
 703                 close(IO->SendBuf.fd);
 704                 IO->SendBuf.fd = IO->RecvBuf.fd = -1;
 705                 return eAbort;
 706         }
 707 /* TODO: maye we could use offsetof() to calc the position of data...
 708  * http://doc.dvgu.ru/devel/ev.html#associating_custom_data_with_a_watcher
 709  */
 710         ev_io_init(&IO->recv_event, IO_recv_callback, IO->RecvBuf.fd, EV_READ);
 711         IO->recv_event.data = IO;
 712         ev_io_init(&IO->send_event, IO_send_callback, IO->SendBuf.fd, EV_WRITE);
 713         IO->send_event.data = IO;
 714
 715         ev_timer_init(&IO->conn_fail, IO_connfail_callback, conn_timeout, 0);
 716         IO->conn_fail.data = IO;
 717         ev_timer_init(&IO->rw_timeout, IO_Timeout_callback, first_rw_timeout, 0);
 718         IO->rw_timeout.data = IO;
 719
 720
 721         /*  Bypass it like this: IO->Addr.sin_addr.s_addr = inet_addr("127.0.0.1"); */
 722 ///     ((struct sockaddr_in)IO->ConnectMe->Addr).sin_addr.s_addr = inet_addr("127.0.0.1");
 723         if (IO->ConnectMe->IPv6)
 724                 rc = connect(IO->SendBuf.fd, &IO->ConnectMe->Addr, sizeof(struct sockaddr_in6));
 725         else
 726                 rc = connect(IO->SendBuf.fd, (struct sockaddr_in *)&IO->ConnectMe->Addr, sizeof(struct sockaddr_in));
 727
 728         if (rc >= 0){
 729                 syslog(LOG_DEBUG, "connect() immediate success.\n");
 730                 set_start_callback(event_base, IO, 0);
 731                 ev_timer_start(event_base, &IO->rw_timeout);
 732                 return IO->NextState;
 733         }
 734         else if (errno == EINPROGRESS) {
 735                 syslog(LOG_DEBUG, "connect() have to wait now.\n");
 736
 737                 ev_io_init(&IO->conn_event, IO_connestd_callback, IO->SendBuf.fd, EV_READ|EV_WRITE);
 738                 IO->conn_event.data = IO;
 739
 740                 ev_io_start(event_base, &IO->conn_event);
 741                 ev_timer_start(event_base, &IO->conn_fail);
 742                 return IO->NextState;
 743         }
 744         else {
 745                 ev_idle_init(&IO->conn_fail_immediate,
 746                              IO_connfailimmediate_callback);
 747                 IO->conn_fail_immediate.data = IO;
 748                 ev_idle_start(event_base, &IO->conn_fail_immediate);
 749
 750                 syslog(LOG_ERR, "connect() failed: %s\n", strerror(errno));
 751                 StrBufPrintf(IO->ErrMsg, "Failed to connect: %s", strerror(errno));
 752                 return IO->NextState;
 753         }
 754         return IO->NextState;
 755 }
 756
 757 void SetNextTimeout(AsyncIO *IO, double timeout)
 758 {
 759         IO->rw_timeout.repeat = timeout;
 760         ev_timer_again (event_base,  &IO->rw_timeout);
 761 }
 762
 763 eNextState InitEventIO(AsyncIO *IO,
 764                        void *pData,
 765                        double conn_timeout,
 766                        double first_rw_timeout,
 767                        int ReadFirst)
 768 {
 769         IO->Data = pData;
 770         become_session(IO->CitContext);
 771
 772         if (ReadFirst) {
 773                 IO->NextState = eReadMessage;
 774         }
 775         else {
 776                 IO->NextState = eSendReply;
 777         }
 778         return event_connect_socket(IO, conn_timeout, first_rw_timeout);
 779 }
 780
 781 eNextState ReAttachIO(AsyncIO *IO,
 782                       void *pData,
 783                       int ReadFirst)
 784 {
 785         IO->Data = pData;
 786         become_session(IO->CitContext);
 787         ev_cleanup_start(event_base, &IO->abort_by_shutdown);
 788         if (ReadFirst) {
 789                 IO->NextState = eReadMessage;
 790         }
 791         else {
 792                 IO->NextState = eSendReply;
 793         }
 794         set_start_callback(event_base, IO, 0);
 795
 796         return IO->NextState;
 797 }