citadel/event_client.c

   1 /*
   2  *
   3  * Copyright (c) 1998-2009 by the citadel.org team
   4  *
   5  *  This program is open source 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 void FreeAsyncIOContents(AsyncIO *IO)
 231 {
 232         FreeStrBuf(&IO->IOBuf);
 233         FreeStrBuf(&IO->SendBuf.Buf);
 234         FreeStrBuf(&IO->RecvBuf.Buf);
 235 }
 236
 237
 238 void StopClientWatchers(AsyncIO *IO)
 239 {
 240         ev_timer_stop(event_base, &IO->conn_fail);
 241         ev_io_stop(event_base, &IO->conn_event);
 242         ev_idle_stop(event_base, &IO->unwind_stack);
 243
 244         ev_io_stop(event_base, &IO->send_event);
 245         ev_io_stop(event_base, &IO->recv_event);
 246         ev_timer_stop (event_base, &IO->rw_timeout);
 247         close(IO->SendBuf.fd);
 248         IO->SendBuf.fd = 0;
 249         IO->RecvBuf.fd = 0;
 250 }
 251
 252 void ShutDownCLient(AsyncIO *IO)
 253 {
 254         CitContext *Ctx =IO->CitContext;
 255         become_session(Ctx);
 256
 257         EVM_syslog(LOG_DEBUG, "EVENT Terminating \n");
 258
 259         ev_cleanup_stop(event_base, &IO->abort_by_shutdown);
 260         StopClientWatchers(IO);
 261
 262         if (IO->DNS.Channel != NULL) {
 263                 ares_destroy(IO->DNS.Channel);
 264                 ev_io_stop(event_base, &IO->DNS.recv_event);
 265                 ev_io_stop(event_base, &IO->DNS.send_event);
 266                 IO->DNS.Channel = NULL;
 267         }
 268         assert(IO->Terminate);
 269         IO->Terminate(IO);
 270         Ctx->state = CON_IDLE;
 271         Ctx->kill_me = 1;
 272 }
 273
 274
 275 eReadState HandleInbound(AsyncIO *IO)
 276 {
 277         const char *Err = NULL;
 278         eReadState Finished = eBufferNotEmpty;
 279
 280         become_session(IO->CitContext);
 281
 282         while ((Finished == eBufferNotEmpty) &&
 283                ((IO->NextState == eReadMessage)||
 284                 (IO->NextState == eReadMore)||
 285                 (IO->NextState == eReadFile)||
 286                 (IO->NextState == eReadPayload)))
 287         {
 288                 if (IO->RecvBuf.nBlobBytesWanted != 0) {
 289
 290                 }
 291                 else { /* Reading lines... */
 292 //// lex line reply in callback, or do it ourselves. as nnn-blabla means continue reading in SMTP
 293                         if ((IO->NextState == eReadFile) &&
 294                             (Finished == eBufferNotEmpty))
 295                         {
 296                                 Finished = WriteIOBAlreadyRead(&IO->IOB, &Err);
 297                                 if (Finished == eReadSuccess)
 298                                 {
 299                                         IO->NextState = eSendReply;
 300                                 }
 301                         }
 302                         else if (IO->LineReader)
 303                                 Finished = IO->LineReader(IO);
 304                         else
 305                                 Finished = StrBufChunkSipLine(IO->IOBuf, &IO->RecvBuf);
 306
 307                         switch (Finished) {
 308                         case eMustReadMore: /// read new from socket...
 309                                 break;
 310                         case eBufferNotEmpty: /* shouldn't happen... */
 311                         case eReadSuccess: /// done for now...
 312                                 break;
 313                         case eReadFail: /// WHUT?
 314                                 ///todo: shut down!
 315                                 break;
 316                         }
 317
 318                 }
 319
 320                 if (Finished != eMustReadMore) {
 321                         assert(IO->ReadDone);
 322                         ev_io_stop(event_base, &IO->recv_event);
 323                         IO->NextState = IO->ReadDone(IO);
 324                         Finished = StrBufCheckBuffer(&IO->RecvBuf);
 325                 }
 326         }
 327
 328         switch (IO->NextState) {
 329         case eSendFile:
 330                 ev_io_start(event_base, &IO->send_event);
 331                 break;
 332         case eSendReply:
 333         case eSendMore:
 334                 assert(IO->SendDone);
 335                 IO->NextState = IO->SendDone(IO);
 336                 ev_io_start(event_base, &IO->send_event);
 337                 break;
 338         case eReadPayload:
 339         case eReadMore:
 340         case eReadFile:
 341                 ev_io_start(event_base, &IO->recv_event);
 342                 break;
 343         case eTerminateConnection:
 344 //////TODOxxxx
 345                 break;
 346         case eAbort:
 347                 ShutDownCLient(IO);
 348                 break;
 349         case eSendDNSQuery:
 350         case eReadDNSReply:
 351         case eDBQuery:
 352         case eConnect:
 353         case eReadMessage:
 354                 break;
 355         }
 356         return Finished;
 357 }
 358
 359
 360 static void
 361 IO_send_callback(struct ev_loop *loop, ev_io *watcher, int revents)
 362 {
 363         int rc;
 364         AsyncIO *IO = watcher->data;
 365         const char *errmsg = NULL;
 366
 367         become_session(IO->CitContext);
 368 #ifdef BIGBAD_IODBG
 369         {
 370                 int rv = 0;
 371                 char fn [SIZ];
 372                 FILE *fd;
 373                 const char *pch = ChrPtr(IO->SendBuf.Buf);
 374                 const char *pchh = IO->SendBuf.ReadWritePointer;
 375                 long nbytes;
 376
 377                 if (pchh == NULL)
 378                         pchh = pch;
 379
 380                 nbytes = StrLength(IO->SendBuf.Buf) - (pchh - pch);
 381                 snprintf(fn, SIZ, "/tmp/foolog_ev_%s.%d",
 382                          ((CitContext*)(IO->CitContext))->ServiceName,
 383                          IO->SendBuf.fd);
 384
 385                 fd = fopen(fn, "a+");
 386                 fprintf(fd, "Send: BufSize: %ld BufContent: [",
 387                         nbytes);
 388                 rv = fwrite(pchh, nbytes, 1, fd);
 389                 if (!rv) printf("failed to write debug to %s!\n", fn);
 390                 fprintf(fd, "]\n");
 391 #endif
 392                 switch (IO->NextState) {
 393                 case eSendFile:
 394                         rc = FileSendChunked(&IO->IOB, &errmsg);
 395                         if (rc < 0)
 396                                 StrBufPlain(IO->ErrMsg, errmsg, -1);
 397                         break;
 398                 default:
 399                         rc = StrBuf_write_one_chunk_callback(watcher->fd, 0/*TODO*/, &IO->SendBuf);
 400                 }
 401
 402 #ifdef BIGBAD_IODBG
 403                 fprintf(fd, "Sent: BufSize: %d bytes.\n", rc);
 404                 fclose(fd);
 405         }
 406 #endif
 407         if (rc == 0)
 408         {
 409                 ev_io_stop(event_base, &IO->send_event);
 410                 switch (IO->NextState) {
 411                 case eSendMore:
 412                         assert(IO->SendDone);
 413                         IO->NextState = IO->SendDone(IO);
 414
 415                         if ((IO->NextState == eTerminateConnection) ||
 416                             (IO->NextState == eAbort) )
 417                                 ShutDownCLient(IO);
 418                         else {
 419                                 ev_io_start(event_base, &IO->send_event);
 420                         }
 421                         break;
 422                 case eSendFile:
 423                         if (IO->IOB.ChunkSendRemain > 0) {
 424                                 ev_io_start(event_base, &IO->recv_event);
 425                         } else {
 426                                 assert(IO->ReadDone);
 427                                 IO->NextState = IO->ReadDone(IO);
 428                                 switch(IO->NextState) {
 429                                 case eSendDNSQuery:
 430                                 case eReadDNSReply:
 431                                 case eDBQuery:
 432                                 case eConnect:
 433                                         break;
 434                                 case eSendReply:
 435                                 case eSendMore:
 436                                 case eSendFile:
 437                                         ev_io_start(event_base, &IO->send_event);
 438                                         break;
 439                                 case eReadMessage:
 440                                 case eReadMore:
 441                                 case eReadPayload:
 442                                 case eReadFile:
 443                                         break;
 444                                 case eTerminateConnection:
 445                                 case eAbort:
 446                                         break;
 447                                 }
 448                         }
 449                         break;
 450                 case eSendReply:
 451                     if (StrBufCheckBuffer(&IO->SendBuf) != eReadSuccess)
 452                         break;
 453                     IO->NextState = eReadMore;
 454                 case eReadMore:
 455                 case eReadMessage:
 456                 case eReadPayload:
 457                 case eReadFile:
 458                         if (StrBufCheckBuffer(&IO->RecvBuf) == eBufferNotEmpty) {
 459                                 HandleInbound(IO);
 460                         }
 461                         else {
 462                                 ev_io_start(event_base, &IO->recv_event);
 463                         }
 464
 465                         break;
 466                 case eDBQuery:
 467                         /* we now live in another queue, so we have to unregister. */
 468                         ev_cleanup_stop(loop, &IO->abort_by_shutdown);
 469                         break;
 470                 case eSendDNSQuery:
 471                 case eReadDNSReply:
 472                 case eConnect:
 473                 case eTerminateConnection:
 474                 case eAbort:
 475                         break;
 476                 }
 477         }
 478         else if (rc < 0) {
 479                 assert(IO->Timeout);
 480                 IO->Timeout(IO);
 481         }
 482         /* else : must write more. */
 483 }
 484 static void
 485 set_start_callback(struct ev_loop *loop, AsyncIO *IO, int revents)
 486 {
 487
 488         switch(IO->NextState) {
 489         case eReadMore:
 490         case eReadMessage:
 491         case eReadFile:
 492                 ev_io_start(event_base, &IO->recv_event);
 493                 break;
 494         case eSendReply:
 495         case eSendMore:
 496         case eReadPayload:
 497         case eSendFile:
 498                 become_session(IO->CitContext);
 499                 IO_send_callback(loop, &IO->send_event, revents);
 500                 break;
 501         case eDBQuery:
 502         case eSendDNSQuery:
 503         case eReadDNSReply:
 504         case eConnect:
 505         case eTerminateConnection:
 506         case eAbort:
 507                 /// TODO: WHUT?
 508                 break;
 509         }
 510 }
 511
 512 static void
 513 IO_Timeout_callback(struct ev_loop *loop, ev_timer *watcher, int revents)
 514 {
 515         AsyncIO *IO = watcher->data;
 516
 517         ev_timer_stop (event_base, &IO->rw_timeout);
 518         become_session(IO->CitContext);
 519
 520         if (IO->SendBuf.fd != 0)
 521         {
 522                 ev_io_stop(event_base, &IO->send_event);
 523                 ev_io_stop(event_base, &IO->recv_event);
 524                 ev_timer_stop (event_base, &IO->rw_timeout);
 525                 close(IO->SendBuf.fd);
 526                 IO->SendBuf.fd = IO->RecvBuf.fd = 0;
 527         }
 528
 529         assert(IO->Timeout);
 530         switch (IO->Timeout(IO))
 531         {
 532         case eAbort:
 533                 ShutDownCLient(IO);
 534         default:
 535                 break;
 536         }
 537 }
 538
 539 static void
 540 IO_connfail_callback(struct ev_loop *loop, ev_timer *watcher, int revents)
 541 {
 542         AsyncIO *IO = watcher->data;
 543
 544         ev_timer_stop (event_base, &IO->conn_fail);
 545
 546         if (IO->SendBuf.fd != 0)
 547         {
 548                 ev_io_stop(loop, &IO->conn_event);
 549                 ev_io_stop(event_base, &IO->send_event);
 550                 ev_io_stop(event_base, &IO->recv_event);
 551                 ev_timer_stop (event_base, &IO->rw_timeout);
 552                 close(IO->SendBuf.fd);
 553                 IO->SendBuf.fd = IO->RecvBuf.fd = 0;
 554         }
 555         become_session(IO->CitContext);
 556
 557         assert(IO->ConnFail);
 558         switch (IO->ConnFail(IO))
 559         {
 560         case eAbort:
 561                 ShutDownCLient(IO);
 562         default:
 563                 break;
 564
 565         }
 566 }
 567
 568 static void
 569 IO_connfailimmediate_callback(struct ev_loop *loop, ev_idle *watcher, int revents)
 570 {
 571         AsyncIO *IO = watcher->data;
 572
 573         ev_idle_stop (event_base, &IO->conn_fail_immediate);
 574
 575         if (IO->SendBuf.fd != 0)
 576         {
 577                 close(IO->SendBuf.fd);
 578                 IO->SendBuf.fd = IO->RecvBuf.fd = 0;
 579         }
 580         become_session(IO->CitContext);
 581
 582         assert(IO->ConnFail);
 583         switch (IO->ConnFail(IO))
 584         {
 585         case eAbort:
 586                 ShutDownCLient(IO);
 587         default:
 588                 break;
 589
 590         }
 591 }
 592
 593 static void
 594 IO_connestd_callback(struct ev_loop *loop, ev_io *watcher, int revents)
 595 {
 596         AsyncIO *IO = watcher->data;
 597
 598         ev_io_stop(loop, &IO->conn_event);
 599         ev_timer_stop (event_base, &IO->conn_fail);
 600         set_start_callback(loop, IO, revents);
 601 }
 602 static void
 603 IO_recv_callback(struct ev_loop *loop, ev_io *watcher, int revents)
 604 {
 605         const char *errmsg;
 606         ssize_t nbytes;
 607         AsyncIO *IO = watcher->data;
 608
 609         switch (IO->NextState) {
 610         case eReadFile:
 611                 nbytes = FileRecvChunked(&IO->IOB, &errmsg);
 612                 if (nbytes < 0)
 613                         StrBufPlain(IO->ErrMsg, errmsg, -1);
 614                 else
 615                 {
 616                         if (IO->IOB.ChunkSendRemain == 0)
 617                         {
 618                                 IO->NextState = eSendReply;
 619                         }
 620                         else
 621                                 return;
 622                 }
 623                 break;
 624         default:
 625                 nbytes = StrBuf_read_one_chunk_callback(watcher->fd, 0 /*TODO */, &IO->RecvBuf);
 626                 break;
 627         }
 628
 629 #ifdef BIGBAD_IODBG
 630         {
 631                 int rv = 0;
 632                 char fn [SIZ];
 633                 FILE *fd;
 634                 const char *pch = ChrPtr(IO->RecvBuf.Buf);
 635                 const char *pchh = IO->RecvBuf.ReadWritePointer;
 636                 long nbytes;
 637
 638                 if (pchh == NULL)
 639                         pchh = pch;
 640
 641                 nbytes = StrLength(IO->RecvBuf.Buf) - (pchh - pch);
 642                 snprintf(fn, SIZ, "/tmp/foolog_ev_%s.%d",
 643                          ((CitContext*)(IO->CitContext))->ServiceName,
 644                          IO->SendBuf.fd);
 645
 646                 fd = fopen(fn, "a+");
 647                 fprintf(fd, "Read: BufSize: %ld BufContent: [",
 648                         nbytes);
 649                 rv = fwrite(pchh, nbytes, 1, fd);
 650                 if (!rv) printf("failed to write debug to %s!\n", fn);
 651                 fprintf(fd, "]\n");
 652
 653
 654                 fclose(fd);
 655         }
 656 #endif
 657         if (nbytes > 0) {
 658                 HandleInbound(IO);
 659         } else if (nbytes == 0) {
 660                 assert(IO->Timeout);
 661
 662                 switch (IO->Timeout(IO))
 663                 {
 664                 case eAbort:
 665                         ShutDownCLient(IO);
 666                 default:
 667                         break;
 668                 }
 669                 return;
 670         } else if (nbytes == -1) {
 671 /// TODO: FD is gone. kick it.        sock_buff_invoke_free(sb, errno);
 672                 EV_syslog(LOG_DEBUG,
 673                           "EVENT: Socket Invalid! %s \n",
 674                           strerror(errno));
 675                 ShutDownCLient(IO);
 676                 return;
 677         }
 678 }
 679
 680 void
 681 IO_postdns_callback(struct ev_loop *loop, ev_idle *watcher, int revents)
 682 {
 683         AsyncIO *IO = watcher->data;
 684         EV_syslog(LOG_DEBUG, "event: %s\n", __FUNCTION__);
 685         become_session(IO->CitContext);
 686         assert(IO->DNS.Fail);
 687         assert(IO->DNS.Query->PostDNS);
 688         switch (IO->DNS.Query->PostDNS(IO))
 689         {
 690         case eAbort:
 691                 switch (IO->DNS.Fail(IO)) {
 692                 case eAbort:
 693                         ShutDownCLient(IO);
 694                 default:
 695                         break;
 696
 697                 }
 698         default:
 699                 break;
 700         }
 701 }
 702
 703
 704 eNextState EvConnectSock(AsyncIO *IO,
 705                          void *pData,
 706                          double conn_timeout,
 707                          double first_rw_timeout,
 708                          int ReadFirst)
 709 {
 710         int fdflags;
 711         int rc = -1;
 712
 713         IO->Data = pData;
 714         become_session(IO->CitContext);
 715
 716         if (ReadFirst) {
 717                 IO->NextState = eReadMessage;
 718         }
 719         else {
 720                 IO->NextState = eSendReply;
 721         }
 722
 723         IO->SendBuf.fd = IO->RecvBuf.fd =
 724                 socket(
 725                         (IO->ConnectMe->IPv6)?PF_INET6:PF_INET,
 726                         SOCK_STREAM,
 727                         IPPROTO_TCP);
 728
 729         if (IO->SendBuf.fd < 0) {
 730                 EV_syslog(LOG_ERR, "EVENT: socket() failed: %s\n", strerror(errno));
 731                 StrBufPrintf(IO->ErrMsg, "Failed to create socket: %s", strerror(errno));
 732                 return eAbort;
 733         }
 734         fdflags = fcntl(IO->SendBuf.fd, F_GETFL);
 735         if (fdflags < 0) {
 736                 EV_syslog(LOG_DEBUG,
 737                           "EVENT: unable to get socket flags! %s \n",
 738                           strerror(errno));
 739                 StrBufPrintf(IO->ErrMsg, "Failed to get socket flags: %s", strerror(errno));
 740                 return eAbort;
 741         }
 742         fdflags = fdflags | O_NONBLOCK;
 743         if (fcntl(IO->SendBuf.fd, F_SETFL, fdflags) < 0) {
 744                 EV_syslog(LOG_DEBUG,
 745                           "EVENT: unable to set socket nonblocking flags! %s \n",
 746                           strerror(errno));
 747                 StrBufPrintf(IO->ErrMsg, "Failed to set socket flags: %s", strerror(errno));
 748                 close(IO->SendBuf.fd);
 749                 IO->SendBuf.fd = IO->RecvBuf.fd = -1;
 750                 return eAbort;
 751         }
 752 /* TODO: maye we could use offsetof() to calc the position of data...
 753  * http://doc.dvgu.ru/devel/ev.html#associating_custom_data_with_a_watcher
 754  */
 755         ev_io_init(&IO->recv_event, IO_recv_callback, IO->RecvBuf.fd, EV_READ);
 756         IO->recv_event.data = IO;
 757         ev_io_init(&IO->send_event, IO_send_callback, IO->SendBuf.fd, EV_WRITE);
 758         IO->send_event.data = IO;
 759
 760         ev_timer_init(&IO->conn_fail, IO_connfail_callback, conn_timeout, 0);
 761         IO->conn_fail.data = IO;
 762         ev_timer_init(&IO->rw_timeout, IO_Timeout_callback, first_rw_timeout, 0);
 763         IO->rw_timeout.data = IO;
 764
 765
 766         /*  Bypass it like this: IO->Addr.sin_addr.s_addr = inet_addr("127.0.0.1"); */
 767 ///     ((struct sockaddr_in)IO->ConnectMe->Addr).sin_addr.s_addr = inet_addr("127.0.0.1");
 768         if (IO->ConnectMe->IPv6)
 769                 rc = connect(IO->SendBuf.fd, &IO->ConnectMe->Addr, sizeof(struct sockaddr_in6));
 770         else
 771                 rc = connect(IO->SendBuf.fd, (struct sockaddr_in *)&IO->ConnectMe->Addr, sizeof(struct sockaddr_in));
 772
 773         if (rc >= 0){
 774                 EVM_syslog(LOG_DEBUG, "connect() immediate success.\n");
 775                 set_start_callback(event_base, IO, 0);
 776                 ev_timer_start(event_base, &IO->rw_timeout);
 777                 return IO->NextState;
 778         }
 779         else if (errno == EINPROGRESS) {
 780                 EVM_syslog(LOG_DEBUG, "connect() have to wait now.\n");
 781
 782                 ev_io_init(&IO->conn_event, IO_connestd_callback, IO->SendBuf.fd, EV_READ|EV_WRITE);
 783                 IO->conn_event.data = IO;
 784
 785                 ev_io_start(event_base, &IO->conn_event);
 786                 ev_timer_start(event_base, &IO->conn_fail);
 787                 return IO->NextState;
 788         }
 789         else {
 790                 ev_idle_init(&IO->conn_fail_immediate,
 791                              IO_connfailimmediate_callback);
 792                 IO->conn_fail_immediate.data = IO;
 793                 ev_idle_start(event_base, &IO->conn_fail_immediate);
 794
 795                 EV_syslog(LOG_ERR, "connect() failed: %s\n", strerror(errno));
 796                 StrBufPrintf(IO->ErrMsg, "Failed to connect: %s", strerror(errno));
 797                 return IO->NextState;
 798         }
 799         return IO->NextState;
 800 }
 801
 802 void SetNextTimeout(AsyncIO *IO, double timeout)
 803 {
 804         IO->rw_timeout.repeat = timeout;
 805         ev_timer_again (event_base,  &IO->rw_timeout);
 806 }
 807
 808
 809 eNextState ReAttachIO(AsyncIO *IO,
 810                       void *pData,
 811                       int ReadFirst)
 812 {
 813         IO->Data = pData;
 814         become_session(IO->CitContext);
 815         ev_cleanup_start(event_base, &IO->abort_by_shutdown);
 816         if (ReadFirst) {
 817                 IO->NextState = eReadMessage;
 818         }
 819         else {
 820                 IO->NextState = eSendReply;
 821         }
 822         set_start_callback(event_base, IO, 0);
 823
 824         return IO->NextState;
 825 }