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