X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Finspsocket.cpp;h=356904f741b35e8efbcfe5bac61cdaf98721f31e;hb=a785f350fd584d87f3b84bbaff569ecb59c29f04;hp=c63748eab1a16e790f1983ad91509c9f95f40d03;hpb=1312f2db8ed90464e73acdcc07bb1aae92964345;p=user%2Fhenk%2Fcode%2Finspircd.git diff --git a/src/inspsocket.cpp b/src/inspsocket.cpp index c63748eab..356904f74 100644 --- a/src/inspsocket.cpp +++ b/src/inspsocket.cpp @@ -1,24 +1,40 @@ -/* +------------------------------------+ - * | 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 + * Copyright (C) 2007-2009 Robin Burchell + * Copyright (C) 2008 Thomas Stagner + * Copyright (C) 2006-2007 Craig Edwards + * Copyright (C) 2007 Dennis Friis + * Copyright (C) 2006 Oliver Lupton * - * 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 . */ + #include "inspircd.h" #include "socket.h" #include "inspstring.h" #include "socketengine.h" -#ifndef WINDOWS + +#ifndef DISABLE_WRITEV #include #endif +#ifndef IOV_MAX +#define IOV_MAX 1024 +#endif + BufferedSocket::BufferedSocket() { Timeout = NULL; @@ -40,7 +56,7 @@ void BufferedSocket::DoConnect(const std::string &ipaddr, int aport, unsigned lo if (err != I_ERR_NONE) { state = I_ERROR; - SetError(strerror(errno)); + SetError(SocketEngine::LastError()); OnError(err); } } @@ -48,7 +64,7 @@ void BufferedSocket::DoConnect(const std::string &ipaddr, int aport, unsigned lo 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, 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; @@ -57,7 +73,7 @@ BufferedSocketError BufferedSocket::BeginConnect(const std::string &ipaddr, int bind.sa.sa_family = 0; if (!connectbindip.empty()) { - if (!irc::sockets::aptosa(connectbindip, 0, &bind)) + if (!irc::sockets::aptosa(connectbindip, 0, bind)) { return I_ERR_BIND; } @@ -66,16 +82,6 @@ BufferedSocketError BufferedSocket::BeginConnect(const std::string &ipaddr, int 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) @@ -86,7 +92,7 @@ BufferedSocketError BufferedSocket::BeginConnect(const irc::sockets::sockaddrs& 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; } @@ -100,27 +106,22 @@ BufferedSocketError BufferedSocket::BeginConnect(const irc::sockets::sockaddrs& this->state = I_CONNECTING; - if (!ServerInstance->SE->AddFd(this, FD_WANT_NO_READ | FD_WANT_SINGLE_WRITE)) + 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 @@ -132,19 +133,19 @@ void StreamSocket::Close() 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; } -bool StreamSocket::cull() +CullResult StreamSocket::cull() { Close(); - return true; + return EventHandler::cull(); } bool StreamSocket::GetNextLine(std::string& line, char delim) @@ -152,7 +153,7 @@ 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; @@ -181,7 +182,7 @@ void StreamSocket::DoRead() else { char* ReadBuffer = ServerInstance->GetReadBuffer(); - int n = recv(fd, ReadBuffer, ServerInstance->Config->NetBufferSize, 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); @@ -199,7 +200,7 @@ void StreamSocket::DoRead() error = "Connection closed"; ServerInstance->SE->ChangeEventMask(this, FD_WANT_NO_READ | FD_WANT_NO_WRITE); } - else if (errno == EAGAIN) + else if (SocketEngine::IgnoreError()) { ServerInstance->SE->ChangeEventMask(this, FD_WANT_FAST_READ | FD_READ_WILL_BLOCK); } @@ -209,12 +210,15 @@ void StreamSocket::DoRead() } else { - error = strerror(errno); + 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()) @@ -225,52 +229,92 @@ void StreamSocket::DoWrite() 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 + 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; + // 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) @@ -279,6 +323,7 @@ void StreamSocket::DoWrite() modexcept.GetSource(), modexcept.GetReason()); } } +#ifndef DISABLE_WRITEV else { // don't even try if we are known to be blocking @@ -286,15 +331,15 @@ void StreamSocket::DoWrite() return; // start out optimistic - we won't need to write any more int eventChange = FD_WANT_EDGE_WRITE; - while (sendq_len && eventChange == FD_WANT_EDGE_WRITE) + while (error.empty() && sendq_len && eventChange == FD_WANT_EDGE_WRITE) { // 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) + + // cap the number of buffers at MYIOV_MAX + if (bufcount > MYIOV_MAX) { - bufcount = IOV_MAX; + bufcount = MYIOV_MAX; } int rv_max = 0; @@ -318,6 +363,11 @@ void StreamSocket::DoWrite() else if (rv > 0) { // Partial write. Clean out strings from the sendq + if (rv < rv_max) + { + // it's going to block now + eventChange = FD_WANT_FAST_WRITE | FD_WRITE_WILL_BLOCK; + } sendq_len -= rv; while (rv > 0 && !sendq.empty()) { @@ -335,27 +385,23 @@ void StreamSocket::DoWrite() rv = 0; } } - if (rv < rv_max) - { - // it's going to block now - eventChange = FD_WANT_FAST_WRITE | FD_WRITE_WILL_BLOCK; - } } else if (rv == 0) { error = "Connection closed"; } - else if (errno == EAGAIN) + else if (SocketEngine::IgnoreError()) { eventChange = FD_WANT_FAST_WRITE | FD_WRITE_WILL_BLOCK; } else if (errno == EINTR) { // restart interrupted syscall + errno = 0; } else { - error = strerror(errno); + error = SocketEngine::LastError(); } } if (!error.empty()) @@ -368,6 +414,7 @@ void StreamSocket::DoWrite() ServerInstance->SE->ChangeEventMask(this, eventChange); } } +#endif } void StreamSocket::WriteData(const std::string &data) @@ -401,11 +448,6 @@ 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); @@ -446,49 +488,56 @@ void StreamSocket::HandleEvent(EventType et, int errornum) if (!error.empty()) return; BufferedSocketError errcode = I_ERR_OTHER; - switch (et) - { - case EVENT_ERROR: + try { + switch (et) { - if (errornum == 0) - SetError("Connection closed"); - else - 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); } }