1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd: (C) 2002-2008 InspIRCd Development Team
6 * See: http://www.inspircd.org/wiki/index.php/Credits
8 * This program is free but copyrighted software; see
9 * the file COPYING for details.
11 * ---------------------------------------------------
14 /* $Core: libIRCDinspsocket */
17 #include "inspstring.h"
18 #include "socketengine.h"
21 using irc::sockets::OpenTCPSocket;
23 bool BufferedSocket::Readable()
25 return ((this->state != I_CONNECTING) && (this->WaitingForWriteEvent == false));
28 BufferedSocket::BufferedSocket(InspIRCd* SI)
31 this->state = I_DISCONNECTED;
33 this->WaitingForWriteEvent = false;
35 this->IsIOHooked = false;
38 BufferedSocket::BufferedSocket(InspIRCd* SI, int newfd, const char* ip)
42 this->state = I_CONNECTED;
43 strlcpy(this->IP,ip,MAXBUF);
44 this->WaitingForWriteEvent = false;
46 this->IsIOHooked = false;
48 this->Instance->SE->AddFd(this);
51 BufferedSocket::BufferedSocket(InspIRCd* SI, const std::string &ipaddr, int aport, bool listening, unsigned long maxtime, const std::string &connectbindip)
53 this->cbindip = connectbindip;
56 strlcpy(host,ipaddr.c_str(),MAXBUF);
57 this->WaitingForWriteEvent = false;
58 this->IsIOHooked = false;
62 if ((this->fd = OpenTCPSocket(host)) == ERROR)
65 this->state = I_ERROR;
66 this->OnError(I_ERR_SOCKET);
71 if (!SI->BindSocket(this->fd,aport,(char*)ipaddr.c_str()))
75 this->state = I_ERROR;
76 this->OnError(I_ERR_BIND);
77 this->ClosePending = true;
82 this->state = I_LISTENING;
86 if (!this->Instance->SE->AddFd(this))
89 this->state = I_ERROR;
90 this->OnError(I_ERR_NOMOREFDS);
99 strlcpy(this->host,ipaddr.c_str(),MAXBUF);
104 if (strchr(host,':'))
107 if (inet_pton(AF_INET6, host, &n) < 1)
114 if (inet_aton(host,&n) < 1)
119 this->Instance->Logs->Log("SOCKET", DEBUG,"BUG: Hostname passed to BufferedSocket, rather than an IP address!");
120 this->OnError(I_ERR_CONNECT);
123 this->state = I_ERROR;
128 strlcpy(this->IP,host,MAXBUF);
129 timeout_val = maxtime;
130 if (!this->DoConnect())
132 this->OnError(I_ERR_CONNECT);
135 this->state = I_ERROR;
142 void BufferedSocket::WantWrite()
144 this->Instance->SE->WantWrite(this);
145 this->WaitingForWriteEvent = true;
148 void BufferedSocket::SetQueues(int nfd)
150 // attempt to increase socket sendq and recvq as high as its possible
153 if(setsockopt(nfd,SOL_SOCKET,SO_SNDBUF,(const char *)&sendbuf,sizeof(sendbuf)) || setsockopt(nfd,SOL_SOCKET,SO_RCVBUF,(const char *)&recvbuf,sizeof(sendbuf)))
155 //this->Instance->Log(DEFAULT, "Could not increase SO_SNDBUF/SO_RCVBUF for socket %u", GetFd());
156 ; // 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.
160 /* Most irc servers require you to specify the ip you want to bind to.
161 * If you dont specify an IP, they rather dumbly bind to the first IP
162 * of the box (e.g. INADDR_ANY). In InspIRCd, we scan thought the IP
163 * addresses we've bound server ports to, and we try and bind our outbound
164 * connections to the first usable non-loopback and non-any IP we find.
165 * This is easier to configure when you have a lot of links and a lot
166 * of servers to configure.
168 bool BufferedSocket::BindAddr(const std::string &ip)
170 ConfigReader Conf(this->Instance);
171 socklen_t size = sizeof(sockaddr_in);
174 /* Are we looking for a binding to fit an ipv6 host? */
175 if ((ip.empty()) || (ip.find(':') != std::string::npos))
179 while (j < Conf.Enumerate("bind") || (!ip.empty()))
181 std::string sIP = ip.empty() ? Conf.ReadValue("bind","address",j) : ip;
182 if (!ip.empty() || Conf.ReadValue("bind","type",j) == "servers")
184 if (!ip.empty() || ((sIP != "*") && (sIP != "127.0.0.1") && (!sIP.empty()) && (sIP != "::1")))
186 /* The [2] is required because we may write a sockaddr_in6 here, and sockaddr_in6 is larger than sockaddr, where sockaddr_in4 is not. */
187 sockaddr* s = new sockaddr[2];
192 if (inet_pton(AF_INET6, sIP.c_str(), &n) > 0)
194 memcpy(&((sockaddr_in6*)s)->sin6_addr, &n, sizeof(sockaddr_in6));
195 ((sockaddr_in6*)s)->sin6_port = 0;
196 ((sockaddr_in6*)s)->sin6_family = AF_INET6;
197 size = sizeof(sockaddr_in6);
210 if (inet_aton(sIP.c_str(), &n) > 0)
212 ((sockaddr_in*)s)->sin_addr = n;
213 ((sockaddr_in*)s)->sin_port = 0;
214 ((sockaddr_in*)s)->sin_family = AF_INET;
224 if (Instance->SE->Bind(this->fd, s, size) < 0)
226 this->state = I_ERROR;
227 this->OnError(I_ERR_BIND);
239 Instance->Logs->Log("SOCKET", DEBUG,"nothing in the config to bind()!");
243 bool BufferedSocket::DoConnect()
245 /* The [2] is required because we may write a sockaddr_in6 here, and sockaddr_in6 is larger than sockaddr, where sockaddr_in4 is not. */
246 sockaddr* addr = new sockaddr[2];
247 socklen_t size = sizeof(sockaddr_in);
250 if ((!*this->host) || strchr(this->host, ':'))
255 this->fd = socket(AF_INET6, SOCK_STREAM, 0);
256 if ((this->fd > -1) && ((strstr(this->IP,"::ffff:") != (char*)&this->IP) && (strstr(this->IP,"::FFFF:") != (char*)&this->IP)))
258 if (!this->BindAddr(this->cbindip))
268 this->fd = socket(AF_INET, SOCK_STREAM, 0);
271 if (!this->BindAddr(this->cbindip))
281 this->state = I_ERROR;
282 this->OnError(I_ERR_SOCKET);
291 if (inet_pton(AF_INET6, this->host, &addy) > 0)
293 ((sockaddr_in6*)addr)->sin6_family = AF_INET6;
294 memcpy(&((sockaddr_in6*)addr)->sin6_addr, &addy, sizeof(addy));
295 ((sockaddr_in6*)addr)->sin6_port = htons(this->port);
296 size = sizeof(sockaddr_in6);
303 if (inet_aton(this->host, &addy) > 0)
305 ((sockaddr_in*)addr)->sin_family = AF_INET;
306 ((sockaddr_in*)addr)->sin_addr = addy;
307 ((sockaddr_in*)addr)->sin_port = htons(this->port);
311 Instance->SE->NonBlocking(this->fd);
314 /* UGH for the LOVE OF ZOMBIE JESUS SOMEONE FIX THIS!!!!!!!!!!! */
315 Instance->SE->Blocking(this->fd);
318 if (Instance->SE->Connect(this, (sockaddr*)addr, size) == -1)
320 if (errno != EINPROGRESS)
322 this->OnError(I_ERR_CONNECT);
324 this->state = I_ERROR;
328 this->Timeout = new SocketTimeout(this->GetFd(), this->Instance, this, timeout_val, this->Instance->Time());
329 this->Instance->Timers->AddTimer(this->Timeout);
332 /* CRAQ SMOKING STUFF TO BE FIXED */
333 Instance->SE->NonBlocking(this->fd);
335 this->state = I_CONNECTING;
338 if (!this->Instance->SE->AddFd(this))
340 this->OnError(I_ERR_NOMOREFDS);
342 this->state = I_ERROR;
345 this->SetQueues(this->fd);
348 Instance->Logs->Log("SOCKET", DEBUG,"BufferedSocket::DoConnect success");
353 void BufferedSocket::Close()
355 /* Save this, so we dont lose it,
356 * otherise on failure, error messages
357 * might be inaccurate.
362 if (this->IsIOHooked && Instance->Config->GetIOHook(this))
366 Instance->Config->GetIOHook(this)->OnRawSocketClose(this->fd);
368 catch (CoreException& modexcept)
370 Instance->Logs->Log("SOCKET", DEFAULT,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
373 Instance->SE->Shutdown(this, 2);
374 if (Instance->SE->Close(this) != -1)
377 if (Instance->SocketCull.find(this) == Instance->SocketCull.end())
378 Instance->SocketCull[this] = this;
383 std::string BufferedSocket::GetIP()
388 const char* BufferedSocket::Read()
390 if (!Instance->SE->BoundsCheckFd(this))
395 if (this->IsIOHooked)
401 MOD_RESULT = Instance->Config->GetIOHook(this)->OnRawSocketRead(this->fd,this->ibuf,sizeof(this->ibuf),result2);
403 catch (CoreException& modexcept)
405 Instance->Logs->Log("SOCKET", DEFAULT,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
419 n = recv(this->fd,this->ibuf,sizeof(this->ibuf),0);
422 if ((n > 0) && (n <= (int)sizeof(this->ibuf)))
437 void BufferedSocket::MarkAsClosed()
441 // There are two possible outcomes to this function.
442 // It will either write all of the data, or an undefined amount.
443 // If an undefined amount is written the connection has failed
444 // and should be aborted.
445 int BufferedSocket::Write(const std::string &data)
447 /* Try and append the data to the back of the queue, and send it on its way
449 outbuffer.push_back(data);
450 this->Instance->SE->WantWrite(this);
451 return (!this->FlushWriteBuffer());
454 bool BufferedSocket::FlushWriteBuffer()
457 if ((this->fd > -1) && (this->state == I_CONNECTED))
459 if (this->IsIOHooked)
461 while (outbuffer.size() && (errno != EAGAIN))
465 /* XXX: The lack of buffering here is NOT a bug, modules implementing this interface have to
466 * implement their own buffering mechanisms
468 Instance->Config->GetIOHook(this)->OnRawSocketWrite(this->fd, outbuffer[0].c_str(), outbuffer[0].length());
469 outbuffer.pop_front();
471 catch (CoreException& modexcept)
473 Instance->Logs->Log("SOCKET", DEBUG,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
480 /* If we have multiple lines, try to send them all,
481 * not just the first one -- Brain
483 while (outbuffer.size() && (errno != EAGAIN))
486 int result = Instance->SE->Send(this, outbuffer[0].c_str(), outbuffer[0].length(), 0);
490 if ((unsigned int)result >= outbuffer[0].length())
492 /* The whole block was written (usually a line)
493 * Pop the block off the front of the queue,
494 * dont set errno, because we are clear of errors
495 * and want to try and write the next block too.
497 outbuffer.pop_front();
501 std::string temp = outbuffer[0].substr(result);
503 /* We didnt get the whole line out. arses.
504 * Try again next time, i guess. Set errno,
505 * because we shouldnt be writing any more now,
506 * until the socketengine says its safe to do so.
511 else if (result == 0)
513 this->Instance->SE->DelFd(this);
517 else if ((result == -1) && (errno != EAGAIN))
519 this->OnError(I_ERR_WRITE);
520 this->state = I_ERROR;
521 this->Instance->SE->DelFd(this);
529 if ((errno == EAGAIN) && (fd > -1))
531 this->Instance->SE->WantWrite(this);
537 void SocketTimeout::Tick(time_t)
539 ServerInstance->Logs->Log("SOCKET", DEBUG,"SocketTimeout::Tick");
541 if (ServerInstance->SE->GetRef(this->sfd) != this->sock)
544 if (this->sock->state == I_CONNECTING)
546 // for non-listening sockets, the timeout can occur
547 // which causes termination of the connection after
548 // the given number of seconds without a successful
550 this->sock->OnTimeout();
551 this->sock->OnError(I_ERR_TIMEOUT);
552 this->sock->timeout = true;
554 /* NOTE: We must set this AFTER DelFd, as we added
555 * this socket whilst writeable. This means that we
556 * must DELETE the socket whilst writeable too!
558 this->sock->state = I_ERROR;
560 if (ServerInstance->SocketCull.find(this->sock) == ServerInstance->SocketCull.end())
561 ServerInstance->SocketCull[this->sock] = this->sock;
564 this->sock->Timeout = NULL;
567 bool BufferedSocket::Poll()
572 if (!Instance->SE->BoundsCheckFd(this))
576 if (Instance->SE->GetRef(this->fd) != this)
582 /* Our socket was in write-state, so delete it and re-add it
588 this->Instance->SE->DelFd(this);
589 if (!this->Instance->SE->AddFd(this))
593 this->SetState(I_CONNECTED);
595 if (Instance->Config->GetIOHook(this))
597 Instance->Logs->Log("SOCKET",DEBUG,"Hook for raw connect");
600 Instance->Config->GetIOHook(this)->OnRawSocketConnect(this->fd);
602 catch (CoreException& modexcept)
604 Instance->Logs->Log("SOCKET",DEBUG,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
607 return this->OnConnected();
611 /* The [2] is required because we may write a sockaddr_in6 here, and sockaddr_in6 is larger than sockaddr, where sockaddr_in4 is not. */
612 sockaddr* client = new sockaddr[2];
613 length = sizeof (sockaddr_in);
616 if ((!*this->host) || strchr(this->host, ':'))
617 length = sizeof(sockaddr_in6);
619 incoming = Instance->SE->Accept(this, client, &length);
621 if ((!*this->host) || strchr(this->host, ':'))
624 recvip = inet_ntop(AF_INET6, &((sockaddr_in6*)client)->sin6_addr, buf, sizeof(buf));
629 // FIX: we were doing this for IPv6 connections as well, which was fucking recvip..
630 // Add brackets to make this a bit clearer. -- w00t (Jan 15, 2008)
631 recvip = inet_ntoa(((sockaddr_in*)client)->sin_addr);
634 Instance->SE->NonBlocking(incoming);
636 this->OnIncomingConnection(incoming, (char*)recvip.c_str());
638 if (this->IsIOHooked)
642 Instance->Config->GetIOHook(this)->OnRawSocketAccept(incoming, recvip.c_str(), this->port);
644 catch (CoreException& modexcept)
646 Instance->Logs->Log("SOCKET",DEBUG,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
650 this->SetQueues(incoming);
657 /* Process the read event */
658 return this->OnDataReady();
666 void BufferedSocket::SetState(BufferedSocketState s)
671 BufferedSocketState BufferedSocket::GetState()
676 int BufferedSocket::GetFd()
681 bool BufferedSocket::OnConnected() { return true; }
682 void BufferedSocket::OnError(BufferedSocketError) { return; }
683 int BufferedSocket::OnDisconnect() { return 0; }
684 int BufferedSocket::OnIncomingConnection(int, char*) { return 0; }
685 bool BufferedSocket::OnDataReady() { return true; }
686 bool BufferedSocket::OnWriteReady() { return true; }
687 void BufferedSocket::OnTimeout() { return; }
688 void BufferedSocket::OnClose() { return; }
690 BufferedSocket::~BufferedSocket()
695 Instance->Timers->DelTimer(Timeout);
700 void BufferedSocket::HandleEvent(EventType et, int errornum)
708 this->OnError(I_ERR_TIMEOUT);
712 this->OnError(this->state == I_CONNECTING ? I_ERR_CONNECT : I_ERR_WRITE);
715 this->OnError(I_ERR_BIND);
719 this->OnError(I_ERR_WRITE);
722 if (this->Instance->SocketCull.find(this) == this->Instance->SocketCull.end())
723 this->Instance->SocketCull[this] = this;
729 if (this->Instance->SocketCull.find(this) == this->Instance->SocketCull.end())
730 this->Instance->SocketCull[this] = this;
735 if (this->WaitingForWriteEvent)
737 this->WaitingForWriteEvent = false;
738 if (!this->OnWriteReady())
740 if (this->Instance->SocketCull.find(this) == this->Instance->SocketCull.end())
741 this->Instance->SocketCull[this] = this;
745 if (this->state == I_CONNECTING)
747 /* This might look wrong as if we should be actually calling
748 * with EVENT_WRITE, but trust me it is correct. There are some
749 * writeability-state things in the read code, because of how
750 * BufferedSocket used to work regarding write buffering in previous
751 * versions of InspIRCd. - Brain
753 this->HandleEvent(EVENT_READ);
758 if (this->FlushWriteBuffer())
760 if (this->Instance->SocketCull.find(this) == this->Instance->SocketCull.end())
761 this->Instance->SocketCull[this] = this;