-/* +------------------------------------+
- * | Inspire Internet Relay Chat Daemon |
- * +------------------------------------+
+/*
+ * InspIRCd -- Internet Relay Chat Daemon
*
- * InspIRCd: (C) 2002-2009 InspIRCd Development Team
- * See: http://wiki.inspircd.org/Credits
+ * Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
+ * Copyright (C) 2007-2009 Robin Burchell <robin+git@viroteck.net>
+ * Copyright (C) 2008 Thomas Stagner <aquanight@inspircd.org>
+ * Copyright (C) 2006-2007 Craig Edwards <craigedwards@brainbox.cc>
+ * Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
+ * Copyright (C) 2006 Oliver Lupton <oliverlupton@gmail.com>
*
- * This program is free but copyrighted software; see
- * the file COPYING for details.
+ * This file is part of InspIRCd. InspIRCd is free software: you can
+ * redistribute it and/or modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation, version 2.
*
- * ---------------------------------------------------
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+
#include "inspircd.h"
#include "socket.h"
#include "inspstring.h"
#include "socketengine.h"
+#ifndef DISABLE_WRITEV
+#include <sys/uio.h>
+#endif
+
+#ifndef IOV_MAX
+#define IOV_MAX 1024
+#endif
+
BufferedSocket::BufferedSocket()
{
Timeout = NULL;
this->fd = newfd;
this->state = I_CONNECTED;
if (fd > -1)
- ServerInstance->SE->AddFd(this);
+ ServerInstance->SE->AddFd(this, FD_WANT_FAST_READ | FD_WANT_EDGE_WRITE);
}
void BufferedSocket::DoConnect(const std::string &ipaddr, int aport, unsigned long maxtime, const std::string &connectbindip)
if (err != I_ERR_NONE)
{
state = I_ERROR;
- SetError(strerror(errno));
+ SetError(SocketEngine::LastError());
OnError(err);
}
}
BufferedSocketError BufferedSocket::BeginConnect(const std::string &ipaddr, int aport, unsigned long maxtime, const std::string &connectbindip)
{
irc::sockets::sockaddrs addr, bind;
- if (!irc::sockets::aptosa(ipaddr.c_str(), aport, &addr))
+ if (!irc::sockets::aptosa(ipaddr, aport, addr))
{
ServerInstance->Logs->Log("SOCKET", DEBUG, "BUG: Hostname passed to BufferedSocket, rather than an IP address!");
return I_ERR_CONNECT;
bind.sa.sa_family = 0;
if (!connectbindip.empty())
{
- if (!irc::sockets::aptosa(connectbindip.c_str(), 0, &bind))
+ if (!irc::sockets::aptosa(connectbindip, 0, bind))
{
return I_ERR_BIND;
}
return BeginConnect(addr, bind, maxtime);
}
-static void IncreaseOSBuffers(int fd)
-{
- // attempt to increase socket sendq and recvq as high as its possible
- int sendbuf = 32768;
- int recvbuf = 32768;
- setsockopt(fd,SOL_SOCKET,SO_SNDBUF,(const char *)&sendbuf,sizeof(sendbuf));
- setsockopt(fd,SOL_SOCKET,SO_RCVBUF,(const char *)&recvbuf,sizeof(recvbuf));
- // 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.
-}
-
BufferedSocketError BufferedSocket::BeginConnect(const irc::sockets::sockaddrs& dest, const irc::sockets::sockaddrs& bind, unsigned long timeout)
{
if (fd < 0)
if (bind.sa.sa_family != 0)
{
- if (ServerInstance->SE->Bind(fd, &bind.sa, sa_size(bind)) < 0)
+ if (ServerInstance->SE->Bind(fd, bind) < 0)
return I_ERR_BIND;
}
this->state = I_CONNECTING;
- if (!ServerInstance->SE->AddFd(this, true))
+ if (!ServerInstance->SE->AddFd(this, FD_WANT_NO_READ | FD_WANT_SINGLE_WRITE | FD_WRITE_WILL_BLOCK))
return I_ERR_NOMOREFDS;
this->Timeout = new SocketTimeout(this->GetFd(), this, timeout, ServerInstance->Time());
ServerInstance->Timers->AddTimer(this->Timeout);
- IncreaseOSBuffers(fd);
-
ServerInstance->Logs->Log("SOCKET", DEBUG,"BufferedSocket::DoConnect success");
return I_ERR_NONE;
}
void StreamSocket::Close()
{
- /* Save this, so we dont lose it,
- * otherise on failure, error messages
- * might be inaccurate.
- */
- int save = errno;
if (this->fd > -1)
{
+ // final chance, dump as much of the sendq as we can
+ DoWrite();
if (IOHook)
{
try
ServerInstance->Logs->Log("SOCKET", DEFAULT,"%s threw an exception: %s",
modexcept.GetSource(), modexcept.GetReason());
}
+ IOHook = NULL;
}
ServerInstance->SE->Shutdown(this, 2);
ServerInstance->SE->DelFd(this);
ServerInstance->SE->Close(this);
fd = -1;
}
- errno = save;
}
-void StreamSocket::cull()
+CullResult StreamSocket::cull()
{
Close();
+ return EventHandler::cull();
}
bool StreamSocket::GetNextLine(std::string& line, char delim)
std::string::size_type i = recvq.find(delim);
if (i == std::string::npos)
return false;
- line = recvq.substr(0, i - 1);
+ line = recvq.substr(0, i);
// TODO is this the most efficient way to split?
recvq = recvq.substr(i + 1);
return true;
else
{
char* ReadBuffer = ServerInstance->GetReadBuffer();
- int n = recv(fd, ReadBuffer, ServerInstance->Config->NetBufferSize, 0);
- if (n > 0)
+ int n = ServerInstance->SE->Recv(this, ReadBuffer, ServerInstance->Config->NetBufferSize, 0);
+ if (n == ServerInstance->Config->NetBufferSize)
{
+ ServerInstance->SE->ChangeEventMask(this, FD_WANT_FAST_READ | FD_ADD_TRIAL_READ);
+ recvq.append(ReadBuffer, n);
+ OnDataReady();
+ }
+ else if (n > 0)
+ {
+ ServerInstance->SE->ChangeEventMask(this, FD_WANT_FAST_READ);
recvq.append(ReadBuffer, n);
OnDataReady();
}
else if (n == 0)
{
error = "Connection closed";
+ ServerInstance->SE->ChangeEventMask(this, FD_WANT_NO_READ | FD_WANT_NO_WRITE);
}
- else if (errno != EAGAIN && errno != EINTR)
+ else if (SocketEngine::IgnoreError())
{
- error = strerror(errno);
+ ServerInstance->SE->ChangeEventMask(this, FD_WANT_FAST_READ | FD_READ_WILL_BLOCK);
+ }
+ else if (errno == EINTR)
+ {
+ ServerInstance->SE->ChangeEventMask(this, FD_WANT_FAST_READ | FD_ADD_TRIAL_READ);
+ }
+ else
+ {
+ error = SocketEngine::LastError();
+ ServerInstance->SE->ChangeEventMask(this, FD_WANT_NO_READ | FD_WANT_NO_WRITE);
}
}
}
+/* Don't try to prepare huge blobs of data to send to a blocked socket */
+static const int MYIOV_MAX = IOV_MAX < 128 ? IOV_MAX : 128;
+
void StreamSocket::DoWrite()
{
if (sendq.empty())
return;
+ if (!error.empty() || fd < 0 || fd == INT_MAX)
+ {
+ ServerInstance->Logs->Log("SOCKET", DEBUG, "DoWrite on errored or closed socket");
+ return;
+ }
+#ifndef DISABLE_WRITEV
if (IOHook)
+#endif
{
int rv = -1;
try
{
- if (sendq.size() > 1 && sendq[0].length() < 1024)
+ while (error.empty() && !sendq.empty())
{
- // Avoid multiple repeated SSL encryption invocations
- // This adds a single copy of the queue, but avoids
- // much more overhead in terms of system calls invoked
- // by the IOHook.
- //
- // The length limit of 1024 is to prevent merging strings
- // more than once when writes begin to block.
- std::string tmp;
- tmp.reserve(sendq_len);
- for(unsigned int i=0; i < sendq.size(); i++)
- tmp.append(sendq[i]);
- sendq.clear();
- sendq.push_back(tmp);
- }
- while (!sendq.empty())
- {
- std::string& front = sendq.front();
- int itemlen = front.length();
- rv = IOHook->OnStreamSocketWrite(this, front);
- if (rv > 0)
+ if (sendq.size() > 1 && sendq[0].length() < 1024)
{
- // consumed the entire string, and is ready for more
- sendq_len -= itemlen;
- sendq.pop_front();
+ // Avoid multiple repeated SSL encryption invocations
+ // This adds a single copy of the queue, but avoids
+ // much more overhead in terms of system calls invoked
+ // by the IOHook.
+ //
+ // The length limit of 1024 is to prevent merging strings
+ // more than once when writes begin to block.
+ std::string tmp;
+ tmp.reserve(1280);
+ while (!sendq.empty() && tmp.length() < 1024)
+ {
+ tmp.append(sendq.front());
+ sendq.pop_front();
+ }
+ sendq.push_front(tmp);
}
- else if (rv == 0)
+ std::string& front = sendq.front();
+ int itemlen = front.length();
+ if (IOHook)
{
- // socket has blocked. Stop trying to send data.
- // IOHook has requested unblock notification from the socketengine
-
- // Since it is possible that a partial write took place, adjust sendq_len
- sendq_len = sendq_len - itemlen + front.length();
- return;
+ rv = IOHook->OnStreamSocketWrite(this, front);
+ if (rv > 0)
+ {
+ // consumed the entire string, and is ready for more
+ sendq_len -= itemlen;
+ sendq.pop_front();
+ }
+ else if (rv == 0)
+ {
+ // socket has blocked. Stop trying to send data.
+ // IOHook has requested unblock notification from the socketengine
+
+ // Since it is possible that a partial write took place, adjust sendq_len
+ sendq_len = sendq_len - itemlen + front.length();
+ return;
+ }
+ else
+ {
+ SetError("Write Error"); // will not overwrite a better error message
+ return;
+ }
}
+#ifdef DISABLE_WRITEV
else
{
- SetError("Write Error"); // will not overwrite a better error message
- return;
+ rv = ServerInstance->SE->Send(this, front.data(), itemlen, 0);
+ if (rv == 0)
+ {
+ SetError("Connection closed");
+ return;
+ }
+ else if (rv < 0)
+ {
+ if (errno == EINTR || SocketEngine::IgnoreError())
+ ServerInstance->SE->ChangeEventMask(this, FD_WANT_FAST_WRITE | FD_WRITE_WILL_BLOCK);
+ else
+ SetError(SocketEngine::LastError());
+ return;
+ }
+ else if (rv < itemlen)
+ {
+ ServerInstance->SE->ChangeEventMask(this, FD_WANT_FAST_WRITE | FD_WRITE_WILL_BLOCK);
+ front = front.substr(rv);
+ sendq_len -= rv;
+ return;
+ }
+ else
+ {
+ sendq_len -= itemlen;
+ sendq.pop_front();
+ if (sendq.empty())
+ ServerInstance->SE->ChangeEventMask(this, FD_WANT_EDGE_WRITE);
+ }
}
+#endif
}
}
catch (CoreException& modexcept)
modexcept.GetSource(), modexcept.GetReason());
}
}
+#ifndef DISABLE_WRITEV
else
{
- // Prepare a writev() call to write all buffers efficiently
- int bufcount = sendq.size();
-
- // cap the number of buffers at IOV_MAX
- if (bufcount > IOV_MAX)
- bufcount = IOV_MAX;
-
- iovec* iovecs = new iovec[bufcount];
- for(int i=0; i < bufcount; i++)
- {
- iovecs[i].iov_base = const_cast<char*>(sendq[i].data());
- iovecs[i].iov_len = sendq[i].length();
- }
- int rv = writev(fd, iovecs, bufcount);
- delete[] iovecs;
- if (rv == (int)sendq_len)
- {
- // it's our lucky day, everything got written out. Fast cleanup.
- sendq_len = 0;
- sendq.clear();
- }
- else if (rv > 0)
+ // don't even try if we are known to be blocking
+ if (GetEventMask() & FD_WRITE_WILL_BLOCK)
+ return;
+ // start out optimistic - we won't need to write any more
+ int eventChange = FD_WANT_EDGE_WRITE;
+ while (error.empty() && sendq_len && eventChange == FD_WANT_EDGE_WRITE)
{
- // Partial write. Clean out strings from the sendq
- sendq_len -= rv;
- while (rv > 0 && !sendq.empty())
+ // Prepare a writev() call to write all buffers efficiently
+ int bufcount = sendq.size();
+
+ // cap the number of buffers at MYIOV_MAX
+ if (bufcount > MYIOV_MAX)
{
- std::string& front = sendq.front();
- if (front.length() < (size_t)rv)
+ bufcount = MYIOV_MAX;
+ }
+
+ int rv_max = 0;
+ iovec* iovecs = new iovec[bufcount];
+ for(int i=0; i < bufcount; i++)
+ {
+ iovecs[i].iov_base = const_cast<char*>(sendq[i].data());
+ iovecs[i].iov_len = sendq[i].length();
+ rv_max += sendq[i].length();
+ }
+ int rv = writev(fd, iovecs, bufcount);
+ delete[] iovecs;
+
+ if (rv == (int)sendq_len)
+ {
+ // it's our lucky day, everything got written out. Fast cleanup.
+ // This won't ever happen if the number of buffers got capped.
+ sendq_len = 0;
+ sendq.clear();
+ }
+ else if (rv > 0)
+ {
+ // Partial write. Clean out strings from the sendq
+ if (rv < rv_max)
{
- // this string got fully written out
- rv -= front.length();
- sendq.pop_front();
+ // it's going to block now
+ eventChange = FD_WANT_FAST_WRITE | FD_WRITE_WILL_BLOCK;
}
- else
+ sendq_len -= rv;
+ while (rv > 0 && !sendq.empty())
{
- // stopped in the middle of this string
- front = front.substr(rv);
- rv = 0;
+ std::string& front = sendq.front();
+ if (front.length() <= (size_t)rv)
+ {
+ // this string got fully written out
+ rv -= front.length();
+ sendq.pop_front();
+ }
+ else
+ {
+ // stopped in the middle of this string
+ front = front.substr(rv);
+ rv = 0;
+ }
}
}
+ else if (rv == 0)
+ {
+ error = "Connection closed";
+ }
+ else if (SocketEngine::IgnoreError())
+ {
+ eventChange = FD_WANT_FAST_WRITE | FD_WRITE_WILL_BLOCK;
+ }
+ else if (errno == EINTR)
+ {
+ // restart interrupted syscall
+ errno = 0;
+ }
+ else
+ {
+ error = SocketEngine::LastError();
+ }
}
- else if (rv == 0)
+ if (!error.empty())
{
- error = "Connection closed";
+ // error - kill all events
+ ServerInstance->SE->ChangeEventMask(this, FD_WANT_NO_READ | FD_WANT_NO_WRITE);
}
- else if (errno != EAGAIN && errno != EINTR)
+ else
{
- error = strerror(errno);
+ ServerInstance->SE->ChangeEventMask(this, eventChange);
}
- if (sendq_len && error.empty())
- ServerInstance->SE->WantWrite(this);
}
+#endif
}
void StreamSocket::WriteData(const std::string &data)
data.c_str());
return;
}
- bool newWrite = sendq.empty() && !data.empty();
/* Append the data to the back of the queue ready for writing */
sendq.push_back(data);
sendq_len += data.length();
- if (newWrite)
- {
- // TODO perhaps we should try writing first, before asking SE about writes?
- // DoWrite();
- ServerInstance->SE->WantWrite(this);
- }
+ ServerInstance->SE->ChangeEventMask(this, FD_ADD_TRIAL_WRITE);
}
void SocketTimeout::Tick(time_t)
// connection.
this->sock->OnTimeout();
this->sock->OnError(I_ERR_TIMEOUT);
-
- /* NOTE: We must set this AFTER DelFd, as we added
- * this socket whilst writeable. This means that we
- * must DELETE the socket whilst writeable too!
- */
this->sock->state = I_ERROR;
ServerInstance->GlobalCulls.AddItem(sock);
this->OnConnected();
if (GetIOHook())
GetIOHook()->OnStreamSocketConnect(this);
+ else
+ ServerInstance->SE->ChangeEventMask(this, FD_WANT_FAST_READ | FD_WANT_EDGE_WRITE);
}
this->StreamSocket::DoWrite();
}
void StreamSocket::HandleEvent(EventType et, int errornum)
{
+ if (!error.empty())
+ return;
BufferedSocketError errcode = I_ERR_OTHER;
- switch (et)
- {
- case EVENT_ERROR:
+ try {
+ switch (et)
{
- SetError(strerror(errornum));
- switch (errornum)
+ case EVENT_ERROR:
{
- case ETIMEDOUT:
- errcode = I_ERR_TIMEOUT;
- break;
- case ECONNREFUSED:
- case 0:
- errcode = I_ERR_CONNECT;
- break;
- case EADDRINUSE:
- errcode = I_ERR_BIND;
- break;
- case EPIPE:
- case EIO:
- errcode = I_ERR_WRITE;
- break;
+ if (errornum == 0)
+ SetError("Connection closed");
+ else
+ SetError(SocketEngine::GetError(errornum));
+ switch (errornum)
+ {
+ case ETIMEDOUT:
+ errcode = I_ERR_TIMEOUT;
+ break;
+ case ECONNREFUSED:
+ case 0:
+ errcode = I_ERR_CONNECT;
+ break;
+ case EADDRINUSE:
+ errcode = I_ERR_BIND;
+ break;
+ case EPIPE:
+ case EIO:
+ errcode = I_ERR_WRITE;
+ break;
+ }
+ break;
+ }
+ case EVENT_READ:
+ {
+ DoRead();
+ break;
+ }
+ case EVENT_WRITE:
+ {
+ DoWrite();
+ break;
}
- break;
- }
- case EVENT_READ:
- {
- DoRead();
- break;
- }
- case EVENT_WRITE:
- {
- DoWrite();
- break;
}
}
+ catch (CoreException& ex)
+ {
+ ServerInstance->Logs->Log("SOCKET", DEFAULT, "Caught exception in socket processing on FD %d - '%s'",
+ fd, ex.GetReason());
+ SetError(ex.GetReason());
+ }
if (!error.empty())
{
ServerInstance->Logs->Log("SOCKET", DEBUG, "Error on FD %d - '%s'", fd, error.c_str());
OnError(errcode);
- ServerInstance->GlobalCulls.AddItem(this);
}
}
projects / user / henk / code / inspircd.git / blobdiff