src/inspsocket.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "socket.h"
  15 #include "inspstring.h"
  16 #include "socketengine.h"
  17 #include "inspircd.h"
  18
  19 using irc::sockets::OpenTCPSocket;
  20
  21 bool InspSocket::Readable()
  22 {
  23         return ((this->state != I_CONNECTING) && (this->WaitingForWriteEvent == false));
  24 }
  25
  26 InspSocket::InspSocket(InspIRCd* SI)
  27 {
  28         this->Timeout = NULL;
  29         this->state = I_DISCONNECTED;
  30         this->fd = -1;
  31         this->WaitingForWriteEvent = false;
  32         this->Instance = SI;
  33         this->IsIOHooked = false;
  34 }
  35
  36 InspSocket::InspSocket(InspIRCd* SI, int newfd, const char* ip)
  37 {
  38         this->Timeout = NULL;
  39         this->fd = newfd;
  40         this->state = I_CONNECTED;
  41         strlcpy(this->IP,ip,MAXBUF);
  42         this->WaitingForWriteEvent = false;
  43         this->Instance = SI;
  44         this->IsIOHooked = false;
  45         if (this->fd > -1)
  46                 this->Instance->SE->AddFd(this);
  47 }
  48
  49 InspSocket::InspSocket(InspIRCd* SI, const std::string &ipaddr, int aport, bool listening, unsigned long maxtime, const std::string &connectbindip)
  50 {
  51         this->cbindip = connectbindip;
  52         this->fd = -1;
  53         this->Instance = SI;
  54         strlcpy(host,ipaddr.c_str(),MAXBUF);
  55         this->WaitingForWriteEvent = false;
  56         this->IsIOHooked = false;
  57         this->Timeout = NULL;
  58         if (listening)
  59         {
  60                 if ((this->fd = OpenTCPSocket(host)) == ERROR)
  61                 {
  62                         this->fd = -1;
  63                         this->state = I_ERROR;
  64                         this->OnError(I_ERR_SOCKET);
  65                         return;
  66                 }
  67                 else
  68                 {
  69                         if (!SI->BindSocket(this->fd,aport,(char*)ipaddr.c_str()))
  70                         {
  71                                 this->Close();
  72                                 this->fd = -1;
  73                                 this->state = I_ERROR;
  74                                 this->OnError(I_ERR_BIND);
  75                                 this->ClosePending = true;
  76                                 return;
  77                         }
  78                         else
  79                         {
  80                                 this->state = I_LISTENING;
  81                                 this->port = aport;
  82                                 if (this->fd > -1)
  83                                 {
  84                                         if (!this->Instance->SE->AddFd(this))
  85                                         {
  86                                                 this->Close();
  87                                                 this->state = I_ERROR;
  88                                                 this->OnError(I_ERR_NOMOREFDS);
  89                                         }
  90                                 }
  91                                 return;
  92                         }
  93                 }
  94         }
  95         else
  96         {
  97                 strlcpy(this->host,ipaddr.c_str(),MAXBUF);
  98                 this->port = aport;
  99
 100                 bool ipvalid = true;
 101 #ifdef IPV6
 102                 if (strchr(host,':'))
 103                 {
 104                         in6_addr n;
 105                         if (inet_pton(AF_INET6, host, &n) < 1)
 106                                 ipvalid = false;
 107                 }
 108                 else
 109 #endif
 110                 {
 111                         in_addr n;
 112                         if (inet_aton(host,&n) < 1)
 113                                 ipvalid = false;
 114                 }
 115                 if (!ipvalid)
 116                 {
 117                         this->Instance->Log(DEBUG,"BUG: Hostname passed to InspSocket, rather than an IP address!");
 118                         this->OnError(I_ERR_CONNECT);
 119                         this->Close();
 120                         this->fd = -1;
 121                         this->state = I_ERROR;
 122                         return;
 123                 }
 124                 else
 125                 {
 126                         strlcpy(this->IP,host,MAXBUF);
 127                         timeout_val = maxtime;
 128                         if (!this->DoConnect())
 129                         {
 130                                 this->OnError(I_ERR_CONNECT);
 131                                 this->Close();
 132                                 this->fd = -1;
 133                                 this->state = I_ERROR;
 134                                 return;
 135                         }
 136                 }
 137         }
 138 }
 139
 140 void InspSocket::WantWrite()
 141 {
 142         this->Instance->SE->WantWrite(this);
 143         this->WaitingForWriteEvent = true;
 144 }
 145
 146 void InspSocket::SetQueues(int nfd)
 147 {
 148         // attempt to increase socket sendq and recvq as high as its possible
 149         int sendbuf = 32768;
 150         int recvbuf = 32768;
 151         if(setsockopt(nfd,SOL_SOCKET,SO_SNDBUF,(const char *)&sendbuf,sizeof(sendbuf)) || setsockopt(nfd,SOL_SOCKET,SO_RCVBUF,(const char *)&recvbuf,sizeof(sendbuf)))
 152                 this->Instance->Log(DEFAULT, "Could not increase SO_SNDBUF/SO_RCVBUF for socket %u", GetFd());
 153 }
 154
 155 /* Most irc servers require you to specify the ip you want to bind to.
 156  * If you dont specify an IP, they rather dumbly bind to the first IP
 157  * of the box (e.g. INADDR_ANY). In InspIRCd, we scan thought the IP
 158  * addresses we've bound server ports to, and we try and bind our outbound
 159  * connections to the first usable non-loopback and non-any IP we find.
 160  * This is easier to configure when you have a lot of links and a lot
 161  * of servers to configure.
 162  */
 163 bool InspSocket::BindAddr(const std::string &ip)
 164 {
 165         ConfigReader Conf(this->Instance);
 166         socklen_t size = sizeof(sockaddr_in);
 167 #ifdef IPV6
 168         bool v6 = false;
 169         /* Are we looking for a binding to fit an ipv6 host? */
 170         if ((ip.empty()) || (ip.find(':') != std::string::npos))
 171                 v6 = true;
 172 #endif
 173         int j = 0;
 174         while (j < Conf.Enumerate("bind") || (!ip.empty()))
 175         {
 176                 std::string IP = ip.empty() ? Conf.ReadValue("bind","address",j) : ip;
 177                 if (!ip.empty() || Conf.ReadValue("bind","type",j) == "servers")
 178                 {
 179                         if (!ip.empty() || ((IP != "*") && (IP != "127.0.0.1") && (!IP.empty()) && (IP != "::1")))
 180                         {
 181                                 /* The [2] is required because we may write a sockaddr_in6 here, and sockaddr_in6 is larger than sockaddr, where sockaddr_in4 is not. */
 182                                 sockaddr* s = new sockaddr[2];
 183 #ifdef IPV6
 184                                 if (v6)
 185                                 {
 186                                         in6_addr n;
 187                                         if (inet_pton(AF_INET6, IP.c_str(), &n) > 0)
 188                                         {
 189                                                 memcpy(&((sockaddr_in6*)s)->sin6_addr, &n, sizeof(sockaddr_in6));
 190                                                 ((sockaddr_in6*)s)->sin6_port = 0;
 191                                                 ((sockaddr_in6*)s)->sin6_family = AF_INET6;
 192                                                 size = sizeof(sockaddr_in6);
 193                                         }
 194                                         else
 195                                         {
 196                                                 delete[] s;
 197                                                 j++;
 198                                                 continue;
 199                                         }
 200                                 }
 201                                 else
 202 #endif
 203                                 {
 204                                         in_addr n;
 205                                         if (inet_aton(IP.c_str(), &n) > 0)
 206                                         {
 207                                                 ((sockaddr_in*)s)->sin_addr = n;
 208                                                 ((sockaddr_in*)s)->sin_port = 0;
 209                                                 ((sockaddr_in*)s)->sin_family = AF_INET;
 210                                         }
 211                                         else
 212                                         {
 213                                                 delete[] s;
 214                                                 j++;
 215                                                 continue;
 216                                         }
 217                                 }
 218
 219                                 if (Instance->SE->Bind(this->fd, s, size) < 0)
 220                                 {
 221                                         this->state = I_ERROR;
 222                                         this->OnError(I_ERR_BIND);
 223                                         this->fd = -1;
 224                                         delete[] s;
 225                                         return false;
 226                                 }
 227
 228                                 delete[] s;
 229                                 return true;
 230                         }
 231                 }
 232                 j++;
 233         }
 234         return true;
 235 }
 236
 237 bool InspSocket::DoConnect()
 238 {
 239         /* The [2] is required because we may write a sockaddr_in6 here, and sockaddr_in6 is larger than sockaddr, where sockaddr_in4 is not. */
 240         sockaddr* addr = new sockaddr[2];
 241         socklen_t size = sizeof(sockaddr_in);
 242 #ifdef IPV6
 243         bool v6 = false;
 244         if ((!*this->host) || strchr(this->host, ':'))
 245                 v6 = true;
 246
 247         if (v6)
 248         {
 249                 this->fd = socket(AF_INET6, SOCK_STREAM, 0);
 250                 if ((this->fd > -1) && ((strstr(this->IP,"::ffff:") != (char*)&this->IP) && (strstr(this->IP,"::FFFF:") != (char*)&this->IP)))
 251                 {
 252                         if (!this->BindAddr(this->cbindip))
 253                         {
 254                                 delete[] addr;
 255                                 return false;
 256                         }
 257                 }
 258         }
 259         else
 260 #endif
 261         {
 262                 this->fd = socket(AF_INET, SOCK_STREAM, 0);
 263                 if (this->fd > -1)
 264                 {
 265                         if (!this->BindAddr(this->cbindip))
 266                         {
 267                                 delete[] addr;
 268                                 return false;
 269                         }
 270                 }
 271         }
 272
 273         if (this->fd == -1)
 274         {
 275                 this->state = I_ERROR;
 276                 this->OnError(I_ERR_SOCKET);
 277                 delete[] addr;
 278                 return false;
 279         }
 280
 281 #ifdef IPV6
 282         if (v6)
 283         {
 284                 in6_addr addy;
 285                 if (inet_pton(AF_INET6, this->host, &addy) > 0)
 286                 {
 287                         ((sockaddr_in6*)addr)->sin6_family = AF_INET6;
 288                         memcpy(&((sockaddr_in6*)addr)->sin6_addr, &addy, sizeof(addy));
 289                         ((sockaddr_in6*)addr)->sin6_port = htons(this->port);
 290                         size = sizeof(sockaddr_in6);
 291                 }
 292         }
 293         else
 294 #endif
 295         {
 296                 in_addr addy;
 297                 if (inet_aton(this->host, &addy) > 0)
 298                 {
 299                         ((sockaddr_in*)addr)->sin_family = AF_INET;
 300                         ((sockaddr_in*)addr)->sin_addr = addy;
 301                         ((sockaddr_in*)addr)->sin_port = htons(this->port);
 302                 }
 303         }
 304
 305         Instance->SE->NonBlocking(this->fd);
 306
 307 #ifdef WIN32
 308         /* UGH for the LOVE OF ZOMBIE JESUS SOMEONE FIX THIS!!!!!!!!!!! */
 309         Instance->SE->Blocking(this->fd);
 310 #endif
 311
 312         if (Instance->SE->Connect(this, (sockaddr*)addr, size) == -1)
 313         {
 314                 if (errno != EINPROGRESS)
 315                 {
 316                         this->OnError(I_ERR_CONNECT);
 317                         this->Close();
 318                         this->state = I_ERROR;
 319                         return false;
 320                 }
 321
 322                 this->Timeout = new SocketTimeout(this->GetFd(), this->Instance, this, timeout_val, this->Instance->Time());
 323                 this->Instance->Timers->AddTimer(this->Timeout);
 324         }
 325 #ifdef WIN32
 326         /* CRAQ SMOKING STUFF TO BE FIXED */
 327         Instance->SE->NonBlocking(this->fd);
 328 #endif
 329         this->state = I_CONNECTING;
 330         if (this->fd > -1)
 331         {
 332                 if (!this->Instance->SE->AddFd(this))
 333                 {
 334                         this->OnError(I_ERR_NOMOREFDS);
 335                         this->Close();
 336                         this->state = I_ERROR;
 337                         return false;
 338                 }
 339                 this->SetQueues(this->fd);
 340         }
 341         return true;
 342 }
 343
 344
 345 void InspSocket::Close()
 346 {
 347         /* Save this, so we dont lose it,
 348          * otherise on failure, error messages
 349          * might be inaccurate.
 350          */
 351         int save = errno;
 352         if (this->fd > -1)
 353         {
 354                 if (this->IsIOHooked && Instance->Config->GetIOHook(this))
 355                 {
 356                         try
 357                         {
 358                                 Instance->Config->GetIOHook(this)->OnRawSocketClose(this->fd);
 359                         }
 360                         catch (CoreException& modexcept)
 361                         {
 362                                 Instance->Log(DEFAULT,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
 363                         }
 364                 }
 365                 Instance->SE->Shutdown(this, 2);
 366                 if (Instance->SE->Close(this) != -1)
 367                         this->OnClose();
 368
 369                 if (Instance->SocketCull.find(this) == Instance->SocketCull.end())
 370                         Instance->SocketCull[this] = this;
 371         }
 372         errno = save;
 373 }
 374
 375 std::string InspSocket::GetIP()
 376 {
 377         return this->IP;
 378 }
 379
 380 char* InspSocket::Read()
 381 {
 382         if (!Instance->SE->BoundsCheckFd(this))
 383                 return NULL;
 384
 385         int n = 0;
 386
 387         if (this->IsIOHooked)
 388         {
 389                 int result2 = 0;
 390                 int MOD_RESULT = 0;
 391                 try
 392                 {
 393                         MOD_RESULT = Instance->Config->GetIOHook(this)->OnRawSocketRead(this->fd,this->ibuf,sizeof(this->ibuf),result2);
 394                 }
 395                 catch (CoreException& modexcept)
 396                 {
 397                         Instance->Log(DEFAULT,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
 398                 }
 399                 if (MOD_RESULT < 0)
 400                 {
 401                         n = -1;
 402                         errno = EAGAIN;
 403                 }
 404                 else
 405                 {
 406                         n = result2;
 407                 }
 408         }
 409         else
 410         {
 411                 n = recv(this->fd,this->ibuf,sizeof(this->ibuf),0);
 412         }
 413
 414         if ((n > 0) && (n <= (int)sizeof(this->ibuf)))
 415         {
 416                 ibuf[n] = 0;
 417                 return ibuf;
 418         }
 419         else
 420         {
 421                 int err = errno;
 422                 if (err == EAGAIN)
 423                         return "";
 424                 else
 425                         return NULL;
 426         }
 427 }
 428
 429 void InspSocket::MarkAsClosed()
 430 {
 431 }
 432
 433 // There are two possible outcomes to this function.
 434 // It will either write all of the data, or an undefined amount.
 435 // If an undefined amount is written the connection has failed
 436 // and should be aborted.
 437 int InspSocket::Write(const std::string &data)
 438 {
 439         /* Try and append the data to the back of the queue, and send it on its way
 440          */
 441         outbuffer.push_back(data);
 442         this->Instance->SE->WantWrite(this);
 443         return (!this->FlushWriteBuffer());
 444 }
 445
 446 bool InspSocket::FlushWriteBuffer()
 447 {
 448         errno = 0;
 449         if ((this->fd > -1) && (this->state == I_CONNECTED))
 450         {
 451                 if (this->IsIOHooked)
 452                 {
 453                         while (outbuffer.size() && (errno != EAGAIN))
 454                         {
 455                                 try
 456                                 {
 457                                         /* XXX: The lack of buffering here is NOT a bug, modules implementing this interface have to
 458                                          * implement their own buffering mechanisms
 459                                          */
 460                                         Instance->Config->GetIOHook(this)->OnRawSocketWrite(this->fd, outbuffer[0].c_str(), outbuffer[0].length());
 461                                         outbuffer.pop_front();
 462                                 }
 463                                 catch (CoreException& modexcept)
 464                                 {
 465                                         Instance->Log(DEBUG,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
 466                                         return true;
 467                                 }
 468                         }
 469                 }
 470                 else
 471                 {
 472                         /* If we have multiple lines, try to send them all,
 473                          * not just the first one -- Brain
 474                          */
 475                         while (outbuffer.size() && (errno != EAGAIN))
 476                         {
 477                                 /* Send a line */
 478                                 int result = Instance->SE->Send(this, outbuffer[0].c_str(), outbuffer[0].length(), 0);
 479
 480                                 if (result > 0)
 481                                 {
 482                                         if ((unsigned int)result >= outbuffer[0].length())
 483                                         {
 484                                                 /* The whole block was written (usually a line)
 485                                                  * Pop the block off the front of the queue,
 486                                                  * dont set errno, because we are clear of errors
 487                                                  * and want to try and write the next block too.
 488                                                  */
 489                                                 outbuffer.pop_front();
 490                                         }
 491                                         else
 492                                         {
 493                                                 std::string temp = outbuffer[0].substr(result);
 494                                                 outbuffer[0] = temp;
 495                                                 /* We didnt get the whole line out. arses.
 496                                                  * Try again next time, i guess. Set errno,
 497                                                  * because we shouldnt be writing any more now,
 498                                                  * until the socketengine says its safe to do so.
 499                                                  */
 500                                                 errno = EAGAIN;
 501                                         }
 502                                 }
 503                                 else if ((result == -1) && (errno != EAGAIN))
 504                                 {
 505                                         this->OnError(I_ERR_WRITE);
 506                                         this->state = I_ERROR;
 507                                         this->Instance->SE->DelFd(this);
 508                                         this->Close();
 509                                         return true;
 510                                 }
 511                         }
 512                 }
 513         }
 514
 515         if ((errno == EAGAIN) && (fd > -1))
 516         {
 517                 this->Instance->SE->WantWrite(this);
 518         }
 519
 520         return (fd < 0);
 521 }
 522
 523 void SocketTimeout::Tick(time_t now)
 524 {
 525         if (ServerInstance->SE->GetRef(this->sfd) != this->sock)
 526                 return;
 527
 528         if (this->sock->state == I_CONNECTING)
 529         {
 530                 // for non-listening sockets, the timeout can occur
 531                 // which causes termination of the connection after
 532                 // the given number of seconds without a successful
 533                 // connection.
 534                 this->sock->OnTimeout();
 535                 this->sock->OnError(I_ERR_TIMEOUT);
 536                 this->sock->timeout = true;
 537
 538                 /* NOTE: We must set this AFTER DelFd, as we added
 539                  * this socket whilst writeable. This means that we
 540                  * must DELETE the socket whilst writeable too!
 541                  */
 542                 this->sock->state = I_ERROR;
 543
 544                 if (ServerInstance->SocketCull.find(this->sock) == ServerInstance->SocketCull.end())
 545                         ServerInstance->SocketCull[this->sock] = this->sock;
 546         }
 547
 548         this->sock->Timeout = NULL;
 549 }
 550
 551 bool InspSocket::Poll()
 552 {
 553         int incoming = -1;
 554
 555 #ifndef WINDOWS
 556         if (!Instance->SE->BoundsCheckFd(this))
 557                 return false;
 558 #endif
 559
 560         if (Instance->SE->GetRef(this->fd) != this)
 561                 return false;
 562
 563         switch (this->state)
 564         {
 565                 case I_CONNECTING:
 566                         /* Our socket was in write-state, so delete it and re-add it
 567                          * in read-state.
 568                          */
 569 #ifndef WINDOWS
 570                         if (this->fd > -1)
 571                         {
 572                                 this->Instance->SE->DelFd(this);
 573                                 if (!this->Instance->SE->AddFd(this))
 574                                         return false;
 575                         }
 576 #endif
 577                         this->SetState(I_CONNECTED);
 578
 579                         if (Instance->Config->GetIOHook(this))
 580                         {
 581                                 Instance->Log(DEBUG,"Hook for raw connect");
 582                                 try
 583                                 {
 584                                         Instance->Config->GetIOHook(this)->OnRawSocketConnect(this->fd);
 585                                 }
 586                                 catch (CoreException& modexcept)
 587                                 {
 588                                         Instance->Log(DEBUG,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
 589                                 }
 590                         }
 591                         return this->OnConnected();
 592                 break;
 593                 case I_LISTENING:
 594                 {
 595                         /* The [2] is required because we may write a sockaddr_in6 here, and sockaddr_in6 is larger than sockaddr, where sockaddr_in4 is not. */
 596                         sockaddr* client = new sockaddr[2];
 597                         length = sizeof (sockaddr_in);
 598                         std::string recvip;
 599 #ifdef IPV6
 600                         if ((!*this->host) || strchr(this->host, ':'))
 601                                 length = sizeof(sockaddr_in6);
 602 #endif
 603                         incoming = Instance->SE->Accept(this, client, &length);
 604 #ifdef IPV6
 605                         if ((!*this->host) || strchr(this->host, ':'))
 606                         {
 607                                 char buf[1024];
 608                                 recvip = inet_ntop(AF_INET6, &((sockaddr_in6*)client)->sin6_addr, buf, sizeof(buf));
 609                         }
 610                         else
 611 #endif
 612                         recvip = inet_ntoa(((sockaddr_in*)client)->sin_addr);
 613                         this->OnIncomingConnection(incoming, (char*)recvip.c_str());
 614
 615                         if (this->IsIOHooked)
 616                         {
 617                                 try
 618                                 {
 619                                         Instance->Config->GetIOHook(this)->OnRawSocketAccept(incoming, recvip.c_str(), this->port);
 620                                 }
 621                                 catch (CoreException& modexcept)
 622                                 {
 623                                         Instance->Log(DEBUG,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
 624                                 }
 625                         }
 626
 627                         this->SetQueues(incoming);
 628
 629                         delete[] client;
 630                         return true;
 631                 }
 632                 break;
 633                 case I_CONNECTED:
 634                         /* Process the read event */
 635                         return this->OnDataReady();
 636                 break;
 637                 default:
 638                 break;
 639         }
 640         return true;
 641 }
 642
 643 void InspSocket::SetState(InspSocketState s)
 644 {
 645         this->state = s;
 646 }
 647
 648 InspSocketState InspSocket::GetState()
 649 {
 650         return this->state;
 651 }
 652
 653 int InspSocket::GetFd()
 654 {
 655         return this->fd;
 656 }
 657
 658 bool InspSocket::OnConnected() { return true; }
 659 void InspSocket::OnError(InspSocketError e) { return; }
 660 int InspSocket::OnDisconnect() { return 0; }
 661 int InspSocket::OnIncomingConnection(int newfd, char* ip) { return 0; }
 662 bool InspSocket::OnDataReady() { return true; }
 663 bool InspSocket::OnWriteReady() { return true; }
 664 void InspSocket::OnTimeout() { return; }
 665 void InspSocket::OnClose() { return; }
 666
 667 InspSocket::~InspSocket()
 668 {
 669         this->Close();
 670         if (Timeout)
 671         {
 672                 Instance->Timers->DelTimer(Timeout);
 673                 Timeout = NULL;
 674         }
 675 }
 676
 677 void InspSocket::HandleEvent(EventType et, int errornum)
 678 {
 679         switch (et)
 680         {
 681                 case EVENT_ERROR:
 682                         switch (errornum)
 683                         {
 684                                 case ETIMEDOUT:
 685                                         this->OnError(I_ERR_TIMEOUT);
 686                                 break;
 687                                 case ECONNREFUSED:
 688                                 case 0:
 689                                         this->OnError(this->state == I_CONNECTING ? I_ERR_CONNECT : I_ERR_WRITE);
 690                                 break;
 691                                 case EADDRINUSE:
 692                                         this->OnError(I_ERR_BIND);
 693                                 break;
 694                                 case EPIPE:
 695                                 case EIO:
 696                                         this->OnError(I_ERR_WRITE);
 697                                 break;
 698                         }
 699                         if (this->Instance->SocketCull.find(this) == this->Instance->SocketCull.end())
 700                                 this->Instance->SocketCull[this] = this;
 701                         return;
 702                 break;
 703                 case EVENT_READ:
 704                         if (!this->Poll())
 705                         {
 706                                 if (this->Instance->SocketCull.find(this) == this->Instance->SocketCull.end())
 707                                         this->Instance->SocketCull[this] = this;
 708                                 return;
 709                         }
 710                 break;
 711                 case EVENT_WRITE:
 712                         if (this->WaitingForWriteEvent)
 713                         {
 714                                 this->WaitingForWriteEvent = false;
 715                                 if (!this->OnWriteReady())
 716                                 {
 717                                         if (this->Instance->SocketCull.find(this) == this->Instance->SocketCull.end())
 718                                                 this->Instance->SocketCull[this] = this;
 719                                         return;
 720                                 }
 721                         }
 722                         if (this->state == I_CONNECTING)
 723                         {
 724                                 /* This might look wrong as if we should be actually calling
 725                                  * with EVENT_WRITE, but trust me it is correct. There are some
 726                                  * writeability-state things in the read code, because of how
 727                                  * InspSocket used to work regarding write buffering in previous
 728                                  * versions of InspIRCd. - Brain
 729                                  */
 730                                 this->HandleEvent(EVENT_READ);
 731                                 return;
 732                         }
 733                         else
 734                         {
 735                                 if (this->FlushWriteBuffer())
 736                                 {
 737                                         if (this->Instance->SocketCull.find(this) == this->Instance->SocketCull.end())
 738                                                 this->Instance->SocketCull[this] = this;
 739                                         return;
 740                                 }
 741                         }
 742                 break;
 743         }
 744 }
 745