1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd: (C) 2002-2010 InspIRCd Development Team
6 * See: http://wiki.inspircd.org/Credits
8 * This program is free but copyrighted software; see
9 * the file COPYING for details.
11 * ---------------------------------------------------
16 #include "inspstring.h"
17 #include "socketengine.h"
19 #ifndef DISABLE_WRITEV
26 BufferedSocket::BufferedSocket()
32 BufferedSocket::BufferedSocket(int newfd)
36 this->state = I_CONNECTED;
38 ServerInstance->SE->AddFd(this, FD_WANT_FAST_READ | FD_WANT_EDGE_WRITE);
41 void BufferedSocket::DoConnect(const std::string &ipaddr, int aport, unsigned long maxtime, const std::string &connectbindip)
43 BufferedSocketError err = BeginConnect(ipaddr, aport, maxtime, connectbindip);
44 if (err != I_ERR_NONE)
47 SetError(strerror(errno));
52 BufferedSocketError BufferedSocket::BeginConnect(const std::string &ipaddr, int aport, unsigned long maxtime, const std::string &connectbindip)
54 irc::sockets::sockaddrs addr, bind;
55 if (!irc::sockets::aptosa(ipaddr, aport, addr))
57 ServerInstance->Logs->Log("SOCKET", DEBUG, "BUG: Hostname passed to BufferedSocket, rather than an IP address!");
61 bind.sa.sa_family = 0;
62 if (!connectbindip.empty())
64 if (!irc::sockets::aptosa(connectbindip, 0, bind))
70 return BeginConnect(addr, bind, maxtime);
73 static void IncreaseOSBuffers(int fd)
75 // attempt to increase socket sendq and recvq as high as its possible
78 setsockopt(fd,SOL_SOCKET,SO_SNDBUF,(const char *)&sendbuf,sizeof(sendbuf));
79 setsockopt(fd,SOL_SOCKET,SO_RCVBUF,(const char *)&recvbuf,sizeof(recvbuf));
80 // on failure, 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.
83 BufferedSocketError BufferedSocket::BeginConnect(const irc::sockets::sockaddrs& dest, const irc::sockets::sockaddrs& bind, unsigned long timeout)
86 fd = socket(dest.sa.sa_family, SOCK_STREAM, 0);
91 if (bind.sa.sa_family != 0)
93 if (ServerInstance->SE->Bind(fd, bind) < 0)
97 ServerInstance->SE->NonBlocking(fd);
99 if (ServerInstance->SE->Connect(this, &dest.sa, sa_size(dest)) == -1)
101 if (errno != EINPROGRESS)
102 return I_ERR_CONNECT;
105 this->state = I_CONNECTING;
107 if (!ServerInstance->SE->AddFd(this, FD_WANT_NO_READ | FD_WANT_SINGLE_WRITE))
108 return I_ERR_NOMOREFDS;
110 this->Timeout = new SocketTimeout(this->GetFd(), this, timeout, ServerInstance->Time());
111 ServerInstance->Timers->AddTimer(this->Timeout);
113 IncreaseOSBuffers(fd);
115 ServerInstance->Logs->Log("SOCKET", DEBUG,"BufferedSocket::DoConnect success");
119 void StreamSocket::Close()
127 IOHook->OnStreamSocketClose(this);
129 catch (CoreException& modexcept)
131 ServerInstance->Logs->Log("SOCKET", DEFAULT,"%s threw an exception: %s",
132 modexcept.GetSource(), modexcept.GetReason());
136 ServerInstance->SE->Shutdown(this, 2);
137 ServerInstance->SE->DelFd(this);
138 ServerInstance->SE->Close(this);
143 CullResult StreamSocket::cull()
146 return EventHandler::cull();
149 bool StreamSocket::GetNextLine(std::string& line, char delim)
151 std::string::size_type i = recvq.find(delim);
152 if (i == std::string::npos)
154 line = recvq.substr(0, i);
155 // TODO is this the most efficient way to split?
156 recvq = recvq.substr(i + 1);
160 void StreamSocket::DoRead()
167 rv = IOHook->OnStreamSocketRead(this, recvq);
169 catch (CoreException& modexcept)
171 ServerInstance->Logs->Log("SOCKET", DEFAULT, "%s threw an exception: %s",
172 modexcept.GetSource(), modexcept.GetReason());
178 SetError("Read Error"); // will not overwrite a better error message
182 char* ReadBuffer = ServerInstance->GetReadBuffer();
183 int n = recv(fd, ReadBuffer, ServerInstance->Config->NetBufferSize, 0);
184 if (n == ServerInstance->Config->NetBufferSize)
186 ServerInstance->SE->ChangeEventMask(this, FD_WANT_FAST_READ | FD_ADD_TRIAL_READ);
187 recvq.append(ReadBuffer, n);
192 ServerInstance->SE->ChangeEventMask(this, FD_WANT_FAST_READ);
193 recvq.append(ReadBuffer, n);
198 error = "Connection closed";
199 ServerInstance->SE->ChangeEventMask(this, FD_WANT_NO_READ | FD_WANT_NO_WRITE);
201 else if (errno == EAGAIN)
203 ServerInstance->SE->ChangeEventMask(this, FD_WANT_FAST_READ | FD_READ_WILL_BLOCK);
205 else if (errno == EINTR)
207 ServerInstance->SE->ChangeEventMask(this, FD_WANT_FAST_READ | FD_ADD_TRIAL_READ);
211 error = strerror(errno);
212 ServerInstance->SE->ChangeEventMask(this, FD_WANT_NO_READ | FD_WANT_NO_WRITE);
217 void StreamSocket::DoWrite()
221 if (!error.empty() || fd < 0 || fd == INT_MAX)
223 ServerInstance->Logs->Log("SOCKET", DEBUG, "DoWrite on errored or closed socket");
227 #ifndef DISABLE_WRITEV
234 while (error.empty() && !sendq.empty())
236 if (sendq.size() > 1 && sendq[0].length() < 1024)
238 // Avoid multiple repeated SSL encryption invocations
239 // This adds a single copy of the queue, but avoids
240 // much more overhead in terms of system calls invoked
243 // The length limit of 1024 is to prevent merging strings
244 // more than once when writes begin to block.
246 tmp.reserve(sendq_len);
247 for(unsigned int i=0; i < sendq.size(); i++)
248 tmp.append(sendq[i]);
250 sendq.push_back(tmp);
252 std::string& front = sendq.front();
253 int itemlen = front.length();
256 rv = IOHook->OnStreamSocketWrite(this, front);
259 // consumed the entire string, and is ready for more
260 sendq_len -= itemlen;
265 // socket has blocked. Stop trying to send data.
266 // IOHook has requested unblock notification from the socketengine
268 // Since it is possible that a partial write took place, adjust sendq_len
269 sendq_len = sendq_len - itemlen + front.length();
274 SetError("Write Error"); // will not overwrite a better error message
278 #ifdef DISABLE_WRITEV
281 rv = ServerInstance->SE->Send(this, front.data(), itemlen, 0);
284 SetError("Connection closed");
289 if (errno == EAGAIN || errno == EINTR)
290 ServerInstance->SE->ChangeEventMask(this, FD_WANT_FAST_WRITE | FD_WRITE_WILL_BLOCK);
292 SetError(strerror(errno));
295 else if (rv < itemlen)
297 ServerInstance->SE->ChangeEventMask(this, FD_WANT_FAST_WRITE | FD_WRITE_WILL_BLOCK);
298 front = front.substr(itemlen - rv);
304 sendq_len -= itemlen;
307 ServerInstance->SE->ChangeEventMask(this, FD_WANT_EDGE_WRITE);
313 catch (CoreException& modexcept)
315 ServerInstance->Logs->Log("SOCKET", DEBUG,"%s threw an exception: %s",
316 modexcept.GetSource(), modexcept.GetReason());
319 #ifndef DISABLE_WRITEV
322 // don't even try if we are known to be blocking
323 if (GetEventMask() & FD_WRITE_WILL_BLOCK)
325 // start out optimistic - we won't need to write any more
326 int eventChange = FD_WANT_EDGE_WRITE;
327 while (error.empty() && sendq_len && eventChange == FD_WANT_EDGE_WRITE)
329 // Prepare a writev() call to write all buffers efficiently
330 int bufcount = sendq.size();
332 // cap the number of buffers at IOV_MAX
333 if (bufcount > IOV_MAX)
339 iovec* iovecs = new iovec[bufcount];
340 for(int i=0; i < bufcount; i++)
342 iovecs[i].iov_base = const_cast<char*>(sendq[i].data());
343 iovecs[i].iov_len = sendq[i].length();
344 rv_max += sendq[i].length();
346 int rv = writev(fd, iovecs, bufcount);
349 if (rv == (int)sendq_len)
351 // it's our lucky day, everything got written out. Fast cleanup.
352 // This won't ever happen if the number of buffers got capped.
358 // Partial write. Clean out strings from the sendq
361 // it's going to block now
362 eventChange = FD_WANT_FAST_WRITE | FD_WRITE_WILL_BLOCK;
365 while (rv > 0 && !sendq.empty())
367 std::string& front = sendq.front();
368 if (front.length() <= (size_t)rv)
370 // this string got fully written out
371 rv -= front.length();
376 // stopped in the middle of this string
377 front = front.substr(rv);
384 error = "Connection closed";
386 else if (errno == EAGAIN)
388 eventChange = FD_WANT_FAST_WRITE | FD_WRITE_WILL_BLOCK;
390 else if (errno == EINTR)
392 // restart interrupted syscall
397 error = strerror(errno);
402 // error - kill all events
403 ServerInstance->SE->ChangeEventMask(this, FD_WANT_NO_READ | FD_WANT_NO_WRITE);
407 ServerInstance->SE->ChangeEventMask(this, eventChange);
413 void StreamSocket::WriteData(const std::string &data)
417 ServerInstance->Logs->Log("SOCKET", DEBUG, "Attempt to write data to dead socket: %s",
422 /* Append the data to the back of the queue ready for writing */
423 sendq.push_back(data);
424 sendq_len += data.length();
426 ServerInstance->SE->ChangeEventMask(this, FD_ADD_TRIAL_WRITE);
429 void SocketTimeout::Tick(time_t)
431 ServerInstance->Logs->Log("SOCKET", DEBUG,"SocketTimeout::Tick");
433 if (ServerInstance->SE->GetRef(this->sfd) != this->sock)
436 if (this->sock->state == I_CONNECTING)
438 // for connecting sockets, the timeout can occur
439 // which causes termination of the connection after
440 // the given number of seconds without a successful
442 this->sock->OnTimeout();
443 this->sock->OnError(I_ERR_TIMEOUT);
445 /* NOTE: We must set this AFTER DelFd, as we added
446 * this socket whilst writeable. This means that we
447 * must DELETE the socket whilst writeable too!
449 this->sock->state = I_ERROR;
451 ServerInstance->GlobalCulls.AddItem(sock);
454 this->sock->Timeout = NULL;
457 void BufferedSocket::OnConnected() { }
458 void BufferedSocket::OnTimeout() { return; }
460 void BufferedSocket::DoWrite()
462 if (state == I_CONNECTING)
467 GetIOHook()->OnStreamSocketConnect(this);
469 ServerInstance->SE->ChangeEventMask(this, FD_WANT_FAST_READ | FD_WANT_EDGE_WRITE);
471 this->StreamSocket::DoWrite();
474 BufferedSocket::~BufferedSocket()
479 ServerInstance->Timers->DelTimer(Timeout);
484 void StreamSocket::HandleEvent(EventType et, int errornum)
488 BufferedSocketError errcode = I_ERR_OTHER;
495 SetError("Connection closed");
497 SetError(strerror(errornum));
501 errcode = I_ERR_TIMEOUT;
505 errcode = I_ERR_CONNECT;
508 errcode = I_ERR_BIND;
512 errcode = I_ERR_WRITE;
529 catch (CoreException& ex)
531 ServerInstance->Logs->Log("SOCKET", DEFAULT, "Caught exception in socket processing on FD %d - '%s'",
533 SetError(ex.GetReason());
537 ServerInstance->Logs->Log("SOCKET", DEBUG, "Error on FD %d - '%s'", fd, error.c_str());