1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd: (C) 2002-2009 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.sa, sa_size(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()
121 /* Save this, so we dont lose it,
122 * otherise on failure, error messages
123 * might be inaccurate.
132 IOHook->OnStreamSocketClose(this);
134 catch (CoreException& modexcept)
136 ServerInstance->Logs->Log("SOCKET", DEFAULT,"%s threw an exception: %s",
137 modexcept.GetSource(), modexcept.GetReason());
140 ServerInstance->SE->Shutdown(this, 2);
141 ServerInstance->SE->DelFd(this);
142 ServerInstance->SE->Close(this);
148 CullResult StreamSocket::cull()
151 return EventHandler::cull();
154 bool StreamSocket::GetNextLine(std::string& line, char delim)
156 std::string::size_type i = recvq.find(delim);
157 if (i == std::string::npos)
159 line = recvq.substr(0, i - 1);
160 // TODO is this the most efficient way to split?
161 recvq = recvq.substr(i + 1);
165 void StreamSocket::DoRead()
172 rv = IOHook->OnStreamSocketRead(this, recvq);
174 catch (CoreException& modexcept)
176 ServerInstance->Logs->Log("SOCKET", DEFAULT, "%s threw an exception: %s",
177 modexcept.GetSource(), modexcept.GetReason());
183 SetError("Read Error"); // will not overwrite a better error message
187 char* ReadBuffer = ServerInstance->GetReadBuffer();
188 int n = recv(fd, ReadBuffer, ServerInstance->Config->NetBufferSize, 0);
189 if (n == ServerInstance->Config->NetBufferSize)
191 ServerInstance->SE->ChangeEventMask(this, FD_WANT_FAST_READ | FD_ADD_TRIAL_READ);
192 recvq.append(ReadBuffer, n);
197 ServerInstance->SE->ChangeEventMask(this, FD_WANT_FAST_READ);
198 recvq.append(ReadBuffer, n);
203 error = "Connection closed";
204 ServerInstance->SE->ChangeEventMask(this, FD_WANT_NO_READ | FD_WANT_NO_WRITE);
206 else if (errno == EAGAIN)
208 ServerInstance->SE->ChangeEventMask(this, FD_WANT_FAST_READ | FD_READ_WILL_BLOCK);
210 else if (errno == EINTR)
212 ServerInstance->SE->ChangeEventMask(this, FD_WANT_FAST_READ | FD_ADD_TRIAL_READ);
216 error = strerror(errno);
217 ServerInstance->SE->ChangeEventMask(this, FD_WANT_NO_READ | FD_WANT_NO_WRITE);
222 void StreamSocket::DoWrite()
226 if (!error.empty() || fd < 0 || fd == INT_MAX)
228 ServerInstance->Logs->Log("SOCKET", DEBUG, "DoWrite on errored or closed socket");
232 #ifndef DISABLE_WRITEV
239 while (!sendq.empty())
241 if (sendq.size() > 1 && sendq[0].length() < 1024)
243 // Avoid multiple repeated SSL encryption invocations
244 // This adds a single copy of the queue, but avoids
245 // much more overhead in terms of system calls invoked
248 // The length limit of 1024 is to prevent merging strings
249 // more than once when writes begin to block.
251 tmp.reserve(sendq_len);
252 for(unsigned int i=0; i < sendq.size(); i++)
253 tmp.append(sendq[i]);
255 sendq.push_back(tmp);
257 std::string& front = sendq.front();
258 int itemlen = front.length();
261 rv = IOHook->OnStreamSocketWrite(this, front);
264 // consumed the entire string, and is ready for more
265 sendq_len -= itemlen;
270 // socket has blocked. Stop trying to send data.
271 // IOHook has requested unblock notification from the socketengine
273 // Since it is possible that a partial write took place, adjust sendq_len
274 sendq_len = sendq_len - itemlen + front.length();
279 SetError("Write Error"); // will not overwrite a better error message
283 #ifdef DISABLE_WRITEV
286 rv = ServerInstance->SE->Send(this, front.data(), itemlen, 0);
289 SetError("Connection closed");
294 if (errno == EAGAIN || errno == EINTR)
295 ServerInstance->SE->ChangeEventMask(this, FD_WANT_FAST_WRITE | FD_WRITE_WILL_BLOCK);
297 SetError(strerror(errno));
300 else if (rv < itemlen)
302 ServerInstance->SE->ChangeEventMask(this, FD_WANT_FAST_WRITE | FD_WRITE_WILL_BLOCK);
303 front = front.substr(itemlen - rv);
309 sendq_len -= itemlen;
312 ServerInstance->SE->ChangeEventMask(this, FD_WANT_EDGE_WRITE);
318 catch (CoreException& modexcept)
320 ServerInstance->Logs->Log("SOCKET", DEBUG,"%s threw an exception: %s",
321 modexcept.GetSource(), modexcept.GetReason());
324 #ifndef DISABLE_WRITEV
327 // don't even try if we are known to be blocking
328 if (GetEventMask() & FD_WRITE_WILL_BLOCK)
330 // start out optimistic - we won't need to write any more
331 int eventChange = FD_WANT_EDGE_WRITE;
332 while (sendq_len && eventChange == FD_WANT_EDGE_WRITE)
334 // Prepare a writev() call to write all buffers efficiently
335 int bufcount = sendq.size();
337 // cap the number of buffers at IOV_MAX
338 if (bufcount > IOV_MAX)
344 iovec* iovecs = new iovec[bufcount];
345 for(int i=0; i < bufcount; i++)
347 iovecs[i].iov_base = const_cast<char*>(sendq[i].data());
348 iovecs[i].iov_len = sendq[i].length();
349 rv_max += sendq[i].length();
351 int rv = writev(fd, iovecs, bufcount);
354 if (rv == (int)sendq_len)
356 // it's our lucky day, everything got written out. Fast cleanup.
357 // This won't ever happen if the number of buffers got capped.
363 // Partial write. Clean out strings from the sendq
366 // it's going to block now
367 eventChange = FD_WANT_FAST_WRITE | FD_WRITE_WILL_BLOCK;
370 while (rv > 0 && !sendq.empty())
372 std::string& front = sendq.front();
373 if (front.length() <= (size_t)rv)
375 // this string got fully written out
376 rv -= front.length();
381 // stopped in the middle of this string
382 front = front.substr(rv);
389 error = "Connection closed";
391 else if (errno == EAGAIN)
393 eventChange = FD_WANT_FAST_WRITE | FD_WRITE_WILL_BLOCK;
395 else if (errno == EINTR)
397 // restart interrupted syscall
402 error = strerror(errno);
407 // error - kill all events
408 ServerInstance->SE->ChangeEventMask(this, FD_WANT_NO_READ | FD_WANT_NO_WRITE);
412 ServerInstance->SE->ChangeEventMask(this, eventChange);
418 void StreamSocket::WriteData(const std::string &data)
422 ServerInstance->Logs->Log("SOCKET", DEBUG, "Attempt to write data to dead socket: %s",
427 /* Append the data to the back of the queue ready for writing */
428 sendq.push_back(data);
429 sendq_len += data.length();
431 ServerInstance->SE->ChangeEventMask(this, FD_ADD_TRIAL_WRITE);
434 void SocketTimeout::Tick(time_t)
436 ServerInstance->Logs->Log("SOCKET", DEBUG,"SocketTimeout::Tick");
438 if (ServerInstance->SE->GetRef(this->sfd) != this->sock)
441 if (this->sock->state == I_CONNECTING)
443 // for connecting sockets, the timeout can occur
444 // which causes termination of the connection after
445 // the given number of seconds without a successful
447 this->sock->OnTimeout();
448 this->sock->OnError(I_ERR_TIMEOUT);
450 /* NOTE: We must set this AFTER DelFd, as we added
451 * this socket whilst writeable. This means that we
452 * must DELETE the socket whilst writeable too!
454 this->sock->state = I_ERROR;
456 ServerInstance->GlobalCulls.AddItem(sock);
459 this->sock->Timeout = NULL;
462 void BufferedSocket::OnConnected() { }
463 void BufferedSocket::OnTimeout() { return; }
465 void BufferedSocket::DoWrite()
467 if (state == I_CONNECTING)
472 GetIOHook()->OnStreamSocketConnect(this);
474 ServerInstance->SE->ChangeEventMask(this, FD_WANT_FAST_READ | FD_WANT_EDGE_WRITE);
476 this->StreamSocket::DoWrite();
479 BufferedSocket::~BufferedSocket()
484 ServerInstance->Timers->DelTimer(Timeout);
489 void StreamSocket::HandleEvent(EventType et, int errornum)
493 BufferedSocketError errcode = I_ERR_OTHER;
500 SetError("Connection closed");
502 SetError(strerror(errornum));
506 errcode = I_ERR_TIMEOUT;
510 errcode = I_ERR_CONNECT;
513 errcode = I_ERR_BIND;
517 errcode = I_ERR_WRITE;
534 catch (CoreException& ex)
536 ServerInstance->Logs->Log("SOCKET", ERROR, "Caught exception in socket processing on FD %d - '%s'",
538 SetError(ex.GetReason());
542 ServerInstance->Logs->Log("SOCKET", DEBUG, "Error on FD %d - '%s'", fd, error.c_str());
544 ServerInstance->GlobalCulls.AddItem(this);