src/inspsocket.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2008 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 /* $Core */
  15
  16 #include "socket.h"
  17 #include "inspstring.h"
  18 #include "socketengine.h"
  19 #include "inspircd.h"
  20
  21 using irc::sockets::OpenTCPSocket;
  22
  23 bool BufferedSocket::Readable()
  24 {
  25         return ((this->state != I_CONNECTING) && (this->WaitingForWriteEvent == false));
  26 }
  27
  28 BufferedSocket::BufferedSocket(InspIRCd* SI)
  29 {
  30         this->Timeout = NULL;
  31         this->state = I_DISCONNECTED;
  32         this->fd = -1;
  33         this->WaitingForWriteEvent = false;
  34         this->Instance = SI;
  35 }
  36
  37 BufferedSocket::BufferedSocket(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         if (this->fd > -1)
  46                 this->Instance->SE->AddFd(this);
  47 }
  48
  49 BufferedSocket::BufferedSocket(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->Timeout = NULL;
  57         if (listening)
  58         {
  59                 if ((this->fd = OpenTCPSocket(host)) == ERROR)
  60                 {
  61                         this->fd = -1;
  62                         this->state = I_ERROR;
  63                         this->OnError(I_ERR_SOCKET);
  64                         return;
  65                 }
  66                 else
  67                 {
  68                         if (!SI->BindSocket(this->fd,aport,(char*)ipaddr.c_str()))
  69                         {
  70                                 this->Close();
  71                                 this->fd = -1;
  72                                 this->state = I_ERROR;
  73                                 this->OnError(I_ERR_BIND);
  74                                 this->ClosePending = true;
  75                                 return;
  76                         }
  77                         else
  78                         {
  79                                 this->state = I_LISTENING;
  80                                 this->port = aport;
  81                                 if (this->fd > -1)
  82                                 {
  83                                         if (!this->Instance->SE->AddFd(this))
  84                                         {
  85                                                 this->Close();
  86                                                 this->state = I_ERROR;
  87                                                 this->OnError(I_ERR_NOMOREFDS);
  88                                         }
  89                                 }
  90                                 return;
  91                         }
  92                 }
  93         }
  94         else
  95         {
  96                 strlcpy(this->host,ipaddr.c_str(),MAXBUF);
  97                 this->port = aport;
  98
  99                 bool ipvalid = true;
 100 #ifdef IPV6
 101                 if (strchr(host,':'))
 102                 {
 103                         in6_addr n;
 104                         if (inet_pton(AF_INET6, host, &n) < 1)
 105                                 ipvalid = false;
 106                 }
 107                 else
 108 #endif
 109                 {
 110                         in_addr n;
 111                         if (inet_aton(host,&n) < 1)
 112                                 ipvalid = false;
 113                 }
 114                 if (!ipvalid)
 115                 {
 116                         this->Instance->Logs->Log("SOCKET", DEBUG,"BUG: Hostname passed to BufferedSocket, rather than an IP address!");
 117                         this->OnError(I_ERR_CONNECT);
 118                         this->Close();
 119                         this->fd = -1;
 120                         this->state = I_ERROR;
 121                         return;
 122                 }
 123                 else
 124                 {
 125                         strlcpy(this->IP,host,MAXBUF);
 126                         timeout_val = maxtime;
 127                         if (!this->DoConnect())
 128                         {
 129                                 this->OnError(I_ERR_CONNECT);
 130                                 this->Close();
 131                                 this->fd = -1;
 132                                 this->state = I_ERROR;
 133                                 return;
 134                         }
 135                 }
 136         }
 137 }
 138
 139 void BufferedSocket::WantWrite()
 140 {
 141         this->Instance->SE->WantWrite(this);
 142         this->WaitingForWriteEvent = true;
 143 }
 144
 145 void BufferedSocket::SetQueues(int nfd)
 146 {
 147         // attempt to increase socket sendq and recvq as high as its possible
 148         int sendbuf = 32768;
 149         int recvbuf = 32768;
 150         if(setsockopt(nfd,SOL_SOCKET,SO_SNDBUF,(const char *)&sendbuf,sizeof(sendbuf)) || setsockopt(nfd,SOL_SOCKET,SO_RCVBUF,(const char *)&recvbuf,sizeof(sendbuf)))
 151         {
 152                 //this->Instance->Log(DEFAULT, "Could not increase SO_SNDBUF/SO_RCVBUF for socket %u", GetFd());
 153                 ; // do nothing. I'm a little sick of people trying to interpret this message as a result of why their incorrect setups don't work.
 154         }
 155 }
 156
 157 /* Most irc servers require you to specify the ip you want to bind to.
 158  * If you dont specify an IP, they rather dumbly bind to the first IP
 159  * of the box (e.g. INADDR_ANY). In InspIRCd, we scan thought the IP
 160  * addresses we've bound server ports to, and we try and bind our outbound
 161  * connections to the first usable non-loopback and non-any IP we find.
 162  * This is easier to configure when you have a lot of links and a lot
 163  * of servers to configure.
 164  */
 165 bool BufferedSocket::BindAddr(const std::string &ip)
 166 {
 167         ConfigReader Conf(this->Instance);
 168         socklen_t size = sizeof(sockaddr_in);
 169 #ifdef IPV6
 170         bool v6 = false;
 171         /* Are we looking for a binding to fit an ipv6 host? */
 172         if ((ip.empty()) || (ip.find(':') != std::string::npos))
 173                 v6 = true;
 174 #endif
 175         int j = 0;
 176         while (j < Conf.Enumerate("bind") || (!ip.empty()))
 177         {
 178                 std::string sIP = ip.empty() ? Conf.ReadValue("bind","address",j) : ip;
 179                 if (!ip.empty() || Conf.ReadValue("bind","type",j) == "servers")
 180                 {
 181                         if (!ip.empty() || ((sIP != "*") && (sIP != "127.0.0.1") && (!sIP.empty()) && (sIP != "::1")))
 182                         {
 183                                 /* The [2] is required because we may write a sockaddr_in6 here, and sockaddr_in6 is larger than sockaddr, where sockaddr_in4 is not. */
 184                                 sockaddr* s = new sockaddr[2];
 185 #ifdef IPV6
 186                                 if (v6)
 187                                 {
 188                                         in6_addr n;
 189                                         if (inet_pton(AF_INET6, sIP.c_str(), &n) > 0)
 190                                         {
 191                                                 memcpy(&((sockaddr_in6*)s)->sin6_addr, &n, sizeof(sockaddr_in6));
 192                                                 ((sockaddr_in6*)s)->sin6_port = 0;
 193                                                 ((sockaddr_in6*)s)->sin6_family = AF_INET6;
 194                                                 size = sizeof(sockaddr_in6);
 195                                         }
 196                                         else
 197                                         {
 198                                                 delete[] s;
 199                                                 j++;
 200                                                 continue;
 201                                         }
 202                                 }
 203                                 else
 204 #endif
 205                                 {
 206                                         in_addr n;
 207                                         if (inet_aton(sIP.c_str(), &n) > 0)
 208                                         {
 209                                                 ((sockaddr_in*)s)->sin_addr = n;
 210                                                 ((sockaddr_in*)s)->sin_port = 0;
 211                                                 ((sockaddr_in*)s)->sin_family = AF_INET;
 212                                         }
 213                                         else
 214                                         {
 215                                                 delete[] s;
 216                                                 j++;
 217                                                 continue;
 218                                         }
 219                                 }
 220
 221                                 if (Instance->SE->Bind(this->fd, s, size) < 0)
 222                                 {
 223                                         this->state = I_ERROR;
 224                                         this->OnError(I_ERR_BIND);
 225                                         this->fd = -1;
 226                                         delete[] s;
 227                                         return false;
 228                                 }
 229
 230                                 delete[] s;
 231                                 return true;
 232                         }
 233                 }
 234                 j++;
 235         }
 236         Instance->Logs->Log("SOCKET", DEBUG,"nothing in the config to bind()!");
 237         return true;
 238 }
 239
 240 bool BufferedSocket::DoConnect()
 241 {
 242         /* The [2] is required because we may write a sockaddr_in6 here, and sockaddr_in6 is larger than sockaddr, where sockaddr_in4 is not. */
 243         sockaddr* addr = new sockaddr[2];
 244         socklen_t size = sizeof(sockaddr_in);
 245 #ifdef IPV6
 246         bool v6 = false;
 247         if ((!*this->host) || strchr(this->host, ':'))
 248                 v6 = true;
 249
 250         if (v6)
 251         {
 252                 this->fd = socket(AF_INET6, SOCK_STREAM, 0);
 253                 if ((this->fd > -1) && ((strstr(this->IP,"::ffff:") != (char*)&this->IP) && (strstr(this->IP,"::FFFF:") != (char*)&this->IP)))
 254                 {
 255                         if (!this->BindAddr(this->cbindip))
 256                         {
 257                                 delete[] addr;
 258                                 return false;
 259                         }
 260                 }
 261         }
 262         else
 263 #endif
 264         {
 265                 this->fd = socket(AF_INET, SOCK_STREAM, 0);
 266                 if (this->fd > -1)
 267                 {
 268                         if (!this->BindAddr(this->cbindip))
 269                         {
 270                                 delete[] addr;
 271                                 return false;
 272                         }
 273                 }
 274         }
 275
 276         if (this->fd == -1)
 277         {
 278                 this->state = I_ERROR;
 279                 this->OnError(I_ERR_SOCKET);
 280                 delete[] addr;
 281                 return false;
 282         }
 283
 284 #ifdef IPV6
 285         if (v6)
 286         {
 287                 in6_addr addy;
 288                 if (inet_pton(AF_INET6, this->host, &addy) > 0)
 289                 {
 290                         ((sockaddr_in6*)addr)->sin6_family = AF_INET6;
 291                         memcpy(&((sockaddr_in6*)addr)->sin6_addr, &addy, sizeof(addy));
 292                         ((sockaddr_in6*)addr)->sin6_port = htons(this->port);
 293                         size = sizeof(sockaddr_in6);
 294                 }
 295         }
 296         else
 297 #endif
 298         {
 299                 in_addr addy;
 300                 if (inet_aton(this->host, &addy) > 0)
 301                 {
 302                         ((sockaddr_in*)addr)->sin_family = AF_INET;
 303                         ((sockaddr_in*)addr)->sin_addr = addy;
 304                         ((sockaddr_in*)addr)->sin_port = htons(this->port);
 305                 }
 306         }
 307
 308         Instance->SE->NonBlocking(this->fd);
 309
 310 #ifdef WIN32
 311         /* UGH for the LOVE OF ZOMBIE JESUS SOMEONE FIX THIS!!!!!!!!!!! */
 312         Instance->SE->Blocking(this->fd);
 313 #endif
 314
 315         if (Instance->SE->Connect(this, (sockaddr*)addr, size) == -1)
 316         {
 317                 if (errno != EINPROGRESS)
 318                 {
 319                         this->OnError(I_ERR_CONNECT);
 320                         this->Close();
 321                         this->state = I_ERROR;
 322                         return false;
 323                 }
 324
 325                 this->Timeout = new SocketTimeout(this->GetFd(), this->Instance, this, timeout_val, this->Instance->Time());
 326                 this->Instance->Timers->AddTimer(this->Timeout);
 327         }
 328 #ifdef WIN32
 329         /* CRAQ SMOKING STUFF TO BE FIXED */
 330         Instance->SE->NonBlocking(this->fd);
 331 #endif
 332         this->state = I_CONNECTING;
 333         if (this->fd > -1)
 334         {
 335                 if (!this->Instance->SE->AddFd(this))
 336                 {
 337                         this->OnError(I_ERR_NOMOREFDS);
 338                         this->Close();
 339                         this->state = I_ERROR;
 340                         return false;
 341                 }
 342                 this->SetQueues(this->fd);
 343         }
 344
 345         Instance->Logs->Log("SOCKET", DEBUG,"BufferedSocket::DoConnect success");
 346         return true;
 347 }
 348
 349
 350 void BufferedSocket::Close()
 351 {
 352         /* Save this, so we dont lose it,
 353          * otherise on failure, error messages
 354          * might be inaccurate.
 355          */
 356         int save = errno;
 357         if (this->fd > -1)
 358         {
 359                 if (this->GetIOHook())
 360                 {
 361                         try
 362                         {
 363                                 if (this->state != I_LISTENING)
 364                                         this->GetIOHook()->OnRawSocketClose(this->fd);
 365                         }
 366                         catch (CoreException& modexcept)
 367                         {
 368                                 Instance->Logs->Log("SOCKET", DEFAULT,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
 369                         }
 370                 }
 371                 Instance->SE->Shutdown(this, 2);
 372                 if (Instance->SE->Close(this) != -1)
 373                         this->OnClose();
 374
 375                 if (Instance->SocketCull.find(this) == Instance->SocketCull.end())
 376                         Instance->SocketCull[this] = this;
 377         }
 378         errno = save;
 379 }
 380
 381 std::string BufferedSocket::GetIP()
 382 {
 383         return this->IP;
 384 }
 385
 386 const char* BufferedSocket::Read()
 387 {
 388         if (!Instance->SE->BoundsCheckFd(this))
 389                 return NULL;
 390
 391         int n = 0;
 392         char* ReadBuffer = Instance->GetReadBuffer();
 393
 394         if (this->GetIOHook())
 395         {
 396                 int result2 = 0;
 397                 int MOD_RESULT = 0;
 398                 try
 399                 {
 400                         MOD_RESULT = this->GetIOHook()->OnRawSocketRead(this->fd, ReadBuffer, Instance->Config->NetBufferSize, result2);
 401                 }
 402                 catch (CoreException& modexcept)
 403                 {
 404                         Instance->Logs->Log("SOCKET", DEFAULT,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
 405                 }
 406                 if (MOD_RESULT < 0)
 407                 {
 408                         n = -1;
 409                         errno = EAGAIN;
 410                 }
 411                 else
 412                 {
 413                         n = result2;
 414                 }
 415         }
 416         else
 417         {
 418                 n = recv(this->fd, ReadBuffer, Instance->Config->NetBufferSize, 0);
 419         }
 420
 421         /*
 422          * This used to do some silly bounds checking instead of just passing bufsize - 1 to recv.
 423          * Not only does that make absolutely no sense, but it could potentially result in a read buffer's worth
 424          * of data being thrown into the bit bucket for no good reason, which is just *stupid*.. do things correctly now.
 425          * --w00t (july 2, 2008)
 426          */
 427         if (n > 0)
 428         {
 429                 ReadBuffer[n] = 0;
 430                 return ReadBuffer;
 431         }
 432         else
 433         {
 434                 int err = errno;
 435                 if (err == EAGAIN)
 436                         return "";
 437                 else
 438                         return NULL;
 439         }
 440 }
 441
 442 /*
 443  * This function formerly tried to flush write buffer each call.
 444  * While admirable in attempting to get the data out to wherever
 445  * it is going, on a full socket, it's just going to syscall write() and
 446  * EAGAIN constantly, instead of waiting in the SE to know if it can write
 447  * which will chew a bit of CPU.
 448  *
 449  * So, now this function returns void (take note) and just adds to the sendq.
 450  *
 451  * It'll get written at a determinate point when the socketengine tells us it can write.
 452  *              -- w00t (april 1, 2008)
 453  */
 454 void BufferedSocket::Write(const std::string &data)
 455 {
 456         /* Append the data to the back of the queue ready for writing */
 457         outbuffer.push_back(data);
 458
 459         /* Mark ourselves as wanting write */
 460         this->Instance->SE->WantWrite(this);
 461 }
 462
 463 bool BufferedSocket::FlushWriteBuffer()
 464 {
 465         errno = 0;
 466         if ((this->fd > -1) && (this->state == I_CONNECTED))
 467         {
 468                 if (this->GetIOHook())
 469                 {
 470                         while (outbuffer.size() && (errno != EAGAIN))
 471                         {
 472                                 try
 473                                 {
 474                                         /* XXX: The lack of buffering here is NOT a bug, modules implementing this interface have to
 475                                          * implement their own buffering mechanisms
 476                                          */
 477                                         this->GetIOHook()->OnRawSocketWrite(this->fd, outbuffer[0].c_str(), outbuffer[0].length());
 478                                         outbuffer.pop_front();
 479                                 }
 480                                 catch (CoreException& modexcept)
 481                                 {
 482                                         Instance->Logs->Log("SOCKET", DEBUG,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
 483                                         return true;
 484                                 }
 485                         }
 486                 }
 487                 else
 488                 {
 489                         /* If we have multiple lines, try to send them all,
 490                          * not just the first one -- Brain
 491                          */
 492                         while (outbuffer.size() && (errno != EAGAIN))
 493                         {
 494                                 /* Send a line */
 495                                 int result = Instance->SE->Send(this, outbuffer[0].c_str(), outbuffer[0].length(), 0);
 496
 497                                 if (result > 0)
 498                                 {
 499                                         if ((unsigned int)result >= outbuffer[0].length())
 500                                         {
 501                                                 /* The whole block was written (usually a line)
 502                                                  * Pop the block off the front of the queue,
 503                                                  * dont set errno, because we are clear of errors
 504                                                  * and want to try and write the next block too.
 505                                                  */
 506                                                 outbuffer.pop_front();
 507                                         }
 508                                         else
 509                                         {
 510                                                 std::string temp = outbuffer[0].substr(result);
 511                                                 outbuffer[0] = temp;
 512                                                 /* We didnt get the whole line out. arses.
 513                                                  * Try again next time, i guess. Set errno,
 514                                                  * because we shouldnt be writing any more now,
 515                                                  * until the socketengine says its safe to do so.
 516                                                  */
 517                                                 errno = EAGAIN;
 518                                         }
 519                                 }
 520                                 else if (result == 0)
 521                                 {
 522                                         this->Instance->SE->DelFd(this);
 523                                         this->Close();
 524                                         return true;
 525                                 }
 526                                 else if ((result == -1) && (errno != EAGAIN))
 527                                 {
 528                                         this->OnError(I_ERR_WRITE);
 529                                         this->state = I_ERROR;
 530                                         this->Instance->SE->DelFd(this);
 531                                         this->Close();
 532                                         return true;
 533                                 }
 534                         }
 535                 }
 536         }
 537
 538         if ((errno == EAGAIN) && (fd > -1))
 539         {
 540                 this->Instance->SE->WantWrite(this);
 541         }
 542
 543         return (fd < 0);
 544 }
 545
 546 void SocketTimeout::Tick(time_t)
 547 {
 548         ServerInstance->Logs->Log("SOCKET", DEBUG,"SocketTimeout::Tick");
 549
 550         if (ServerInstance->SE->GetRef(this->sfd) != this->sock)
 551                 return;
 552
 553         if (this->sock->state == I_CONNECTING)
 554         {
 555                 // for non-listening sockets, the timeout can occur
 556                 // which causes termination of the connection after
 557                 // the given number of seconds without a successful
 558                 // connection.
 559                 this->sock->OnTimeout();
 560                 this->sock->OnError(I_ERR_TIMEOUT);
 561                 this->sock->timeout = true;
 562
 563                 /* NOTE: We must set this AFTER DelFd, as we added
 564                  * this socket whilst writeable. This means that we
 565                  * must DELETE the socket whilst writeable too!
 566                  */
 567                 this->sock->state = I_ERROR;
 568
 569                 if (ServerInstance->SocketCull.find(this->sock) == ServerInstance->SocketCull.end())
 570                         ServerInstance->SocketCull[this->sock] = this->sock;
 571         }
 572
 573         this->sock->Timeout = NULL;
 574 }
 575
 576 bool BufferedSocket::Poll()
 577 {
 578         int incoming = -1;
 579
 580 #ifndef WINDOWS
 581         if (!Instance->SE->BoundsCheckFd(this))
 582                 return false;
 583 #endif
 584
 585         if (Instance->SE->GetRef(this->fd) != this)
 586                 return false;
 587
 588         switch (this->state)
 589         {
 590                 case I_CONNECTING:
 591                         /* Our socket was in write-state, so delete it and re-add it
 592                          * in read-state.
 593                          */
 594 #ifndef WINDOWS
 595                         if (this->fd > -1)
 596                         {
 597                                 this->Instance->SE->DelFd(this);
 598                                 if (!this->Instance->SE->AddFd(this))
 599                                         return false;
 600                         }
 601 #endif
 602                         this->SetState(I_CONNECTED);
 603
 604                         if (this->GetIOHook())
 605                         {
 606                                 Instance->Logs->Log("SOCKET",DEBUG,"Hook for raw connect");
 607                                 try
 608                                 {
 609                                         this->GetIOHook()->OnRawSocketConnect(this->fd);
 610                                 }
 611                                 catch (CoreException& modexcept)
 612                                 {
 613                                         Instance->Logs->Log("SOCKET",DEBUG,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
 614                                 }
 615                         }
 616                         return this->OnConnected();
 617                 break;
 618                 case I_LISTENING:
 619                 {
 620                         /* The [2] is required because we may write a sockaddr_in6 here, and sockaddr_in6 is larger than sockaddr, where sockaddr_in4 is not. */
 621                         sockaddr* client = new sockaddr[2];
 622                         length = sizeof (sockaddr_in);
 623                         std::string recvip;
 624 #ifdef IPV6
 625                         if ((!*this->host) || strchr(this->host, ':'))
 626                                 length = sizeof(sockaddr_in6);
 627 #endif
 628                         incoming = Instance->SE->Accept(this, client, &length);
 629 #ifdef IPV6
 630                         if ((!*this->host) || strchr(this->host, ':'))
 631                         {
 632                                 char buf[1024];
 633                                 recvip = inet_ntop(AF_INET6, &((sockaddr_in6*)client)->sin6_addr, buf, sizeof(buf));
 634                         }
 635                         else
 636 #endif
 637                         {
 638                                 // FIX: we were doing this for IPv6 connections as well, which was fucking recvip..
 639                                 // Add brackets to make this a bit clearer. -- w00t (Jan 15, 2008)
 640                                 recvip = inet_ntoa(((sockaddr_in*)client)->sin_addr);
 641                         }
 642
 643                         Instance->SE->NonBlocking(incoming);
 644
 645                         this->OnIncomingConnection(incoming, (char*)recvip.c_str());
 646
 647                         if (this->GetIOHook())
 648                         {
 649                                 try
 650                                 {
 651                                         this->GetIOHook()->OnRawSocketAccept(incoming, recvip.c_str(), this->port);
 652                                 }
 653                                 catch (CoreException& modexcept)
 654                                 {
 655                                         Instance->Logs->Log("SOCKET",DEBUG,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
 656                                 }
 657                         }
 658
 659                         this->SetQueues(incoming);
 660
 661                         delete[] client;
 662                         return true;
 663                 }
 664                 break;
 665                 case I_CONNECTED:
 666                         /* Process the read event */
 667                         return this->OnDataReady();
 668                 break;
 669                 default:
 670                 break;
 671         }
 672         return true;
 673 }
 674
 675 void BufferedSocket::SetState(BufferedSocketState s)
 676 {
 677         this->state = s;
 678 }
 679
 680 BufferedSocketState BufferedSocket::GetState()
 681 {
 682         return this->state;
 683 }
 684
 685 int BufferedSocket::GetFd()
 686 {
 687         return this->fd;
 688 }
 689
 690 bool BufferedSocket::OnConnected() { return true; }
 691 void BufferedSocket::OnError(BufferedSocketError) { return; }
 692 int BufferedSocket::OnDisconnect() { return 0; }
 693 int BufferedSocket::OnIncomingConnection(int, char*) { return 0; }
 694 bool BufferedSocket::OnDataReady() { return true; }
 695 bool BufferedSocket::OnWriteReady() { return true; }
 696 void BufferedSocket::OnTimeout() { return; }
 697 void BufferedSocket::OnClose() { return; }
 698
 699 BufferedSocket::~BufferedSocket()
 700 {
 701         this->Close();
 702         if (Timeout)
 703         {
 704                 Instance->Timers->DelTimer(Timeout);
 705                 Timeout = NULL;
 706         }
 707 }
 708
 709 void BufferedSocket::HandleEvent(EventType et, int errornum)
 710 {
 711         switch (et)
 712         {
 713                 case EVENT_ERROR:
 714                         switch (errornum)
 715                         {
 716                                 case ETIMEDOUT:
 717                                         this->OnError(I_ERR_TIMEOUT);
 718                                 break;
 719                                 case ECONNREFUSED:
 720                                 case 0:
 721                                         this->OnError(this->state == I_CONNECTING ? I_ERR_CONNECT : I_ERR_WRITE);
 722                                 break;
 723                                 case EADDRINUSE:
 724                                         this->OnError(I_ERR_BIND);
 725                                 break;
 726                                 case EPIPE:
 727                                 case EIO:
 728                                         this->OnError(I_ERR_WRITE);
 729                                 break;
 730                         }
 731                         if (this->Instance->SocketCull.find(this) == this->Instance->SocketCull.end())
 732                                 this->Instance->SocketCull[this] = this;
 733                         return;
 734                 break;
 735                 case EVENT_READ:
 736                         if (!this->Poll())
 737                         {
 738                                 if (this->Instance->SocketCull.find(this) == this->Instance->SocketCull.end())
 739                                         this->Instance->SocketCull[this] = this;
 740                                 return;
 741                         }
 742                 break;
 743                 case EVENT_WRITE:
 744                         if (this->WaitingForWriteEvent)
 745                         {
 746                                 this->WaitingForWriteEvent = false;
 747                                 if (!this->OnWriteReady())
 748                                 {
 749                                         if (this->Instance->SocketCull.find(this) == this->Instance->SocketCull.end())
 750                                                 this->Instance->SocketCull[this] = this;
 751                                         return;
 752                                 }
 753                         }
 754                         if (this->state == I_CONNECTING)
 755                         {
 756                                 /* This might look wrong as if we should be actually calling
 757                                  * with EVENT_WRITE, but trust me it is correct. There are some
 758                                  * writeability-state things in the read code, because of how
 759                                  * BufferedSocket used to work regarding write buffering in previous
 760                                  * versions of InspIRCd. - Brain
 761                                  */
 762                                 this->HandleEvent(EVENT_READ);
 763                                 return;
 764                         }
 765                         else
 766                         {
 767                                 if (this->FlushWriteBuffer())
 768                                 {
 769                                         if (this->Instance->SocketCull.find(this) == this->Instance->SocketCull.end())
 770                                                 this->Instance->SocketCull[this] = this;
 771                                         return;
 772                                 }
 773                         }
 774                 break;
 775         }
 776 }
 777