1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd: (C) 2002-2007 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->Log(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 IP = ip.empty() ? Conf.ReadValue("bind","address",j) : ip;
182 if (!ip.empty() || Conf.ReadValue("bind","type",j) == "servers")
184 if (!ip.empty() || ((IP != "*") && (IP != "127.0.0.1") && (!IP.empty()) && (IP != "::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, IP.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(IP.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);
242 bool BufferedSocket::DoConnect()
244 /* The [2] is required because we may write a sockaddr_in6 here, and sockaddr_in6 is larger than sockaddr, where sockaddr_in4 is not. */
245 sockaddr* addr = new sockaddr[2];
246 socklen_t size = sizeof(sockaddr_in);
249 if ((!*this->host) || strchr(this->host, ':'))
254 this->fd = socket(AF_INET6, SOCK_STREAM, 0);
255 if ((this->fd > -1) && ((strstr(this->IP,"::ffff:") != (char*)&this->IP) && (strstr(this->IP,"::FFFF:") != (char*)&this->IP)))
257 if (!this->BindAddr(this->cbindip))
267 this->fd = socket(AF_INET, SOCK_STREAM, 0);
270 if (!this->BindAddr(this->cbindip))
280 this->state = I_ERROR;
281 this->OnError(I_ERR_SOCKET);
290 if (inet_pton(AF_INET6, this->host, &addy) > 0)
292 ((sockaddr_in6*)addr)->sin6_family = AF_INET6;
293 memcpy(&((sockaddr_in6*)addr)->sin6_addr, &addy, sizeof(addy));
294 ((sockaddr_in6*)addr)->sin6_port = htons(this->port);
295 size = sizeof(sockaddr_in6);
302 if (inet_aton(this->host, &addy) > 0)
304 ((sockaddr_in*)addr)->sin_family = AF_INET;
305 ((sockaddr_in*)addr)->sin_addr = addy;
306 ((sockaddr_in*)addr)->sin_port = htons(this->port);
310 Instance->SE->NonBlocking(this->fd);
313 /* UGH for the LOVE OF ZOMBIE JESUS SOMEONE FIX THIS!!!!!!!!!!! */
314 Instance->SE->Blocking(this->fd);
317 if (Instance->SE->Connect(this, (sockaddr*)addr, size) == -1)
319 if (errno != EINPROGRESS)
321 this->OnError(I_ERR_CONNECT);
323 this->state = I_ERROR;
327 this->Timeout = new SocketTimeout(this->GetFd(), this->Instance, this, timeout_val, this->Instance->Time());
328 this->Instance->Timers->AddTimer(this->Timeout);
331 /* CRAQ SMOKING STUFF TO BE FIXED */
332 Instance->SE->NonBlocking(this->fd);
334 this->state = I_CONNECTING;
337 if (!this->Instance->SE->AddFd(this))
339 this->OnError(I_ERR_NOMOREFDS);
341 this->state = I_ERROR;
344 this->SetQueues(this->fd);
350 void BufferedSocket::Close()
352 /* Save this, so we dont lose it,
353 * otherise on failure, error messages
354 * might be inaccurate.
359 if (this->IsIOHooked && Instance->Config->GetIOHook(this))
363 Instance->Config->GetIOHook(this)->OnRawSocketClose(this->fd);
365 catch (CoreException& modexcept)
367 Instance->Log(DEFAULT,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
370 Instance->SE->Shutdown(this, 2);
371 if (Instance->SE->Close(this) != -1)
374 if (Instance->SocketCull.find(this) == Instance->SocketCull.end())
375 Instance->SocketCull[this] = this;
380 std::string BufferedSocket::GetIP()
385 char* BufferedSocket::Read()
387 if (!Instance->SE->BoundsCheckFd(this))
392 if (this->IsIOHooked)
398 MOD_RESULT = Instance->Config->GetIOHook(this)->OnRawSocketRead(this->fd,this->ibuf,sizeof(this->ibuf),result2);
400 catch (CoreException& modexcept)
402 Instance->Log(DEFAULT,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
416 n = recv(this->fd,this->ibuf,sizeof(this->ibuf),0);
419 if ((n > 0) && (n <= (int)sizeof(this->ibuf)))
434 void BufferedSocket::MarkAsClosed()
438 // There are two possible outcomes to this function.
439 // It will either write all of the data, or an undefined amount.
440 // If an undefined amount is written the connection has failed
441 // and should be aborted.
442 int BufferedSocket::Write(const std::string &data)
444 /* Try and append the data to the back of the queue, and send it on its way
446 outbuffer.push_back(data);
447 this->Instance->SE->WantWrite(this);
448 return (!this->FlushWriteBuffer());
451 bool BufferedSocket::FlushWriteBuffer()
454 if ((this->fd > -1) && (this->state == I_CONNECTED))
456 if (this->IsIOHooked)
458 while (outbuffer.size() && (errno != EAGAIN))
462 /* XXX: The lack of buffering here is NOT a bug, modules implementing this interface have to
463 * implement their own buffering mechanisms
465 Instance->Config->GetIOHook(this)->OnRawSocketWrite(this->fd, outbuffer[0].c_str(), outbuffer[0].length());
466 outbuffer.pop_front();
468 catch (CoreException& modexcept)
470 Instance->Log(DEBUG,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
477 /* If we have multiple lines, try to send them all,
478 * not just the first one -- Brain
480 while (outbuffer.size() && (errno != EAGAIN))
483 int result = Instance->SE->Send(this, outbuffer[0].c_str(), outbuffer[0].length(), 0);
487 if ((unsigned int)result >= outbuffer[0].length())
489 /* The whole block was written (usually a line)
490 * Pop the block off the front of the queue,
491 * dont set errno, because we are clear of errors
492 * and want to try and write the next block too.
494 outbuffer.pop_front();
498 std::string temp = outbuffer[0].substr(result);
500 /* We didnt get the whole line out. arses.
501 * Try again next time, i guess. Set errno,
502 * because we shouldnt be writing any more now,
503 * until the socketengine says its safe to do so.
508 else if (result == 0)
510 this->Instance->SE->DelFd(this);
514 else if ((result == -1) && (errno != EAGAIN))
516 this->OnError(I_ERR_WRITE);
517 this->state = I_ERROR;
518 this->Instance->SE->DelFd(this);
526 if ((errno == EAGAIN) && (fd > -1))
528 this->Instance->SE->WantWrite(this);
534 void SocketTimeout::Tick(time_t)
536 if (ServerInstance->SE->GetRef(this->sfd) != this->sock)
539 if (this->sock->state == I_CONNECTING)
541 // for non-listening sockets, the timeout can occur
542 // which causes termination of the connection after
543 // the given number of seconds without a successful
545 this->sock->OnTimeout();
546 this->sock->OnError(I_ERR_TIMEOUT);
547 this->sock->timeout = true;
549 /* NOTE: We must set this AFTER DelFd, as we added
550 * this socket whilst writeable. This means that we
551 * must DELETE the socket whilst writeable too!
553 this->sock->state = I_ERROR;
555 if (ServerInstance->SocketCull.find(this->sock) == ServerInstance->SocketCull.end())
556 ServerInstance->SocketCull[this->sock] = this->sock;
559 this->sock->Timeout = NULL;
562 bool BufferedSocket::Poll()
567 if (!Instance->SE->BoundsCheckFd(this))
571 if (Instance->SE->GetRef(this->fd) != this)
577 /* Our socket was in write-state, so delete it and re-add it
583 this->Instance->SE->DelFd(this);
584 if (!this->Instance->SE->AddFd(this))
588 this->SetState(I_CONNECTED);
590 if (Instance->Config->GetIOHook(this))
592 Instance->Log(DEBUG,"Hook for raw connect");
595 Instance->Config->GetIOHook(this)->OnRawSocketConnect(this->fd);
597 catch (CoreException& modexcept)
599 Instance->Log(DEBUG,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
602 return this->OnConnected();
606 /* The [2] is required because we may write a sockaddr_in6 here, and sockaddr_in6 is larger than sockaddr, where sockaddr_in4 is not. */
607 sockaddr* client = new sockaddr[2];
608 length = sizeof (sockaddr_in);
611 if ((!*this->host) || strchr(this->host, ':'))
612 length = sizeof(sockaddr_in6);
614 incoming = Instance->SE->Accept(this, client, &length);
616 if ((!*this->host) || strchr(this->host, ':'))
619 recvip = inet_ntop(AF_INET6, &((sockaddr_in6*)client)->sin6_addr, buf, sizeof(buf));
623 Instance->SE->NonBlocking(incoming);
625 recvip = inet_ntoa(((sockaddr_in*)client)->sin_addr);
626 this->OnIncomingConnection(incoming, (char*)recvip.c_str());
628 if (this->IsIOHooked)
632 Instance->Config->GetIOHook(this)->OnRawSocketAccept(incoming, recvip.c_str(), this->port);
634 catch (CoreException& modexcept)
636 Instance->Log(DEBUG,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
640 this->SetQueues(incoming);
647 /* Process the read event */
648 return this->OnDataReady();
656 void BufferedSocket::SetState(BufferedSocketState s)
661 BufferedSocketState BufferedSocket::GetState()
666 int BufferedSocket::GetFd()
671 bool BufferedSocket::OnConnected() { return true; }
672 void BufferedSocket::OnError(BufferedSocketError) { return; }
673 int BufferedSocket::OnDisconnect() { return 0; }
674 int BufferedSocket::OnIncomingConnection(int, char*) { return 0; }
675 bool BufferedSocket::OnDataReady() { return true; }
676 bool BufferedSocket::OnWriteReady() { return true; }
677 void BufferedSocket::OnTimeout() { return; }
678 void BufferedSocket::OnClose() { return; }
680 BufferedSocket::~BufferedSocket()
685 Instance->Timers->DelTimer(Timeout);
690 void BufferedSocket::HandleEvent(EventType et, int errornum)
698 this->OnError(I_ERR_TIMEOUT);
702 this->OnError(this->state == I_CONNECTING ? I_ERR_CONNECT : I_ERR_WRITE);
705 this->OnError(I_ERR_BIND);
709 this->OnError(I_ERR_WRITE);
712 if (this->Instance->SocketCull.find(this) == this->Instance->SocketCull.end())
713 this->Instance->SocketCull[this] = this;
719 if (this->Instance->SocketCull.find(this) == this->Instance->SocketCull.end())
720 this->Instance->SocketCull[this] = this;
725 if (this->WaitingForWriteEvent)
727 this->WaitingForWriteEvent = false;
728 if (!this->OnWriteReady())
730 if (this->Instance->SocketCull.find(this) == this->Instance->SocketCull.end())
731 this->Instance->SocketCull[this] = this;
735 if (this->state == I_CONNECTING)
737 /* This might look wrong as if we should be actually calling
738 * with EVENT_WRITE, but trust me it is correct. There are some
739 * writeability-state things in the read code, because of how
740 * BufferedSocket used to work regarding write buffering in previous
741 * versions of InspIRCd. - Brain
743 this->HandleEvent(EVENT_READ);
748 if (this->FlushWriteBuffer())
750 if (this->Instance->SocketCull.find(this) == this->Instance->SocketCull.end())
751 this->Instance->SocketCull[this] = this;