X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Fsocketengine.cpp;h=9186f2c8c9ce88b78b0314a6357ccf763c39fcd0;hb=3151d60c1ecc9462e4c335282ee6c31672f45111;hp=69838ff59cfee93fc676be5d376ce542d405203b;hpb=dc12fcac8757b36b7da88d0a9ff25acc009d539c;p=user%2Fhenk%2Fcode%2Finspircd.git diff --git a/src/socketengine.cpp b/src/socketengine.cpp index 69838ff59..9186f2c8c 100644 --- a/src/socketengine.cpp +++ b/src/socketengine.cpp @@ -1,237 +1,391 @@ -/* +------------------------------------+ - * | Inspire Internet Relay Chat Daemon | - * +------------------------------------+ +/* + * InspIRCd -- Internet Relay Chat Daemon * - * Inspire is copyright (C) 2002-2006 ChatSpike-Dev. - * E-mail: - * - * + * Copyright (C) 2017-2020 Sadie Powell + * Copyright (C) 2013-2014 Adam + * Copyright (C) 2012, 2014-2015 Attila Molnar + * Copyright (C) 2012 Robby + * Copyright (C) 2012 ChrisTX + * Copyright (C) 2009-2010 Daniel De Graaf + * Copyright (C) 2008, 2017 Robin Burchell + * Copyright (C) 2007 burlex + * Copyright (C) 2007 Dennis Friis + * Copyright (C) 2006-2008, 2010 Craig Edwards * - * Written by Craig Edwards, Craig McLure, and others. - * 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_config.h" -#include "globals.h" + +#include "exitcodes.h" #include "inspircd.h" -#ifdef USE_EPOLL -#include -#endif -#ifdef USE_KQUEUE -#include -#include -#include -#endif -#include -#include -#include "socketengine.h" -char ref[65535]; +#include + +/** Reference table, contains all current handlers + **/ +std::vector SocketEngine::ref; + +/** Current number of descriptors in the engine + */ +size_t SocketEngine::CurrentSetSize = 0; + +/** List of handlers that want a trial read/write + */ +std::set SocketEngine::trials; + +size_t SocketEngine::MaxSetSize = 0; + +/** Socket engine statistics: count of various events, bandwidth usage + */ +SocketEngine::Statistics SocketEngine::stats; -SocketEngine::SocketEngine() +EventHandler::EventHandler() { - log(DEBUG,"SocketEngine::SocketEngine()"); -#ifdef USE_EPOLL - EngineHandle = epoll_create(65535); -#endif -#ifdef USE_KQUEUE - EngineHandle = kqueue(); -#endif - CurrentSetSize = 0; + fd = -1; + event_mask = 0; } -SocketEngine::~SocketEngine() +void EventHandler::SwapInternals(EventHandler& other) { - log(DEBUG,"SocketEngine::~SocketEngine()"); -#ifdef USE_EPOLL - close(EngineHandle); -#endif -#ifdef USE_KQUEUE - close(EngineHandle); -#endif + std::swap(fd, other.fd); + std::swap(event_mask, other.event_mask); } -char SocketEngine::GetType(int fd) +void EventHandler::SetFd(int FD) { - if ((fd < 0) || (fd > 65535)) - return X_EMPTY_SLOT; - /* Mask off the top bit used for 'read/write' state */ - return (ref[fd] & ~0x80); + this->fd = FD; } -bool SocketEngine::AddFd(int fd, bool readable, char type) +void EventHandler::OnEventHandlerWrite() { - if ((fd < 0) || (fd > 65535)) - return false; - if (GetRemainingFds() <= 1) - { - log(DEFAULT,"ERROR: System out of file descriptors!"); - return false; - } -#ifdef USE_SELECT - fds[fd] = fd; -#endif - ref[fd] = type; - if (readable) - { - log(DEBUG,"Set readbit"); - ref[fd] |= X_READBIT; - } - log(DEBUG,"Add socket %d",fd); -#ifdef USE_EPOLL - struct epoll_event ev; - log(DEBUG,"epoll: Add socket to events, ep=%d socket=%d",EngineHandle,fd); - readable ? ev.events = EPOLLIN | EPOLLET : ev.events = EPOLLOUT | EPOLLET; - ev.data.fd = fd; - int i = epoll_ctl(EngineHandle, EPOLL_CTL_ADD, fd, &ev); - if (i < 0) - { - log(DEBUG,"epoll: List insertion failure!"); - return false; - } +} + +void EventHandler::OnEventHandlerError(int errornum) +{ +} + +void SocketEngine::InitError() +{ + std::cerr << con_red << "FATAL ERROR!" << con_reset << " Socket engine initialization failed. " << strerror(errno) << '.' << std::endl; + exit(EXIT_STATUS_SOCKETENGINE); +} + +void SocketEngine::LookupMaxFds() +{ +#if defined _WIN32 + MaxSetSize = FD_SETSIZE; +#else + struct rlimit limits; + if (!getrlimit(RLIMIT_NOFILE, &limits)) + MaxSetSize = limits.rlim_cur; + +#if defined __APPLE__ + limits.rlim_cur = limits.rlim_max == RLIM_INFINITY ? OPEN_MAX : limits.rlim_max; +#else + limits.rlim_cur = limits.rlim_max; #endif -#ifdef USE_KQUEUE - struct kevent ke; - log(DEBUG,"kqueue: Add socket to events, kq=%d socket=%d",EngineHandle,fd); - EV_SET(&ke, fd, readable ? EVFILT_READ : EVFILT_WRITE, EV_ADD, 0, 0, NULL); - int i = kevent(EngineHandle, &ke, 1, 0, 0, NULL); - if (i == -1) - { - log(DEBUG,"kqueue: List insertion failure!"); - return false; - } + if (!setrlimit(RLIMIT_NOFILE, &limits)) + MaxSetSize = limits.rlim_cur; #endif - CurrentSetSize++; - return true; } -bool SocketEngine::DelFd(int fd) +void SocketEngine::ChangeEventMask(EventHandler* eh, int change) { - log(DEBUG,"SocketEngine::DelFd(%d)",fd); + int old_m = eh->event_mask; + int new_m = old_m; - if ((fd < 0) || (fd > 65535)) - return false; + // if we are changing read/write type, remove the previously set bit + if (change & FD_WANT_READ_MASK) + new_m &= ~FD_WANT_READ_MASK; + if (change & FD_WANT_WRITE_MASK) + new_m &= ~FD_WANT_WRITE_MASK; + + // if adding a trial read/write, insert it into the set + if (change & FD_TRIAL_NOTE_MASK && !(old_m & FD_TRIAL_NOTE_MASK)) + trials.insert(eh->GetFd()); + + new_m |= change; + if (new_m == old_m) + return; + + eh->event_mask = new_m; + OnSetEvent(eh, old_m, new_m); +} -#ifdef USE_SELECT - std::map::iterator t = fds.find(fd); - if (t != fds.end()) +void SocketEngine::DispatchTrialWrites() +{ + std::vector working_list; + working_list.reserve(trials.size()); + working_list.assign(trials.begin(), trials.end()); + trials.clear(); + for(unsigned int i=0; i < working_list.size(); i++) { - fds.erase(t); - log(DEBUG,"Deleted fd %d",fd); + int fd = working_list[i]; + EventHandler* eh = GetRef(fd); + if (!eh) + continue; + int mask = eh->event_mask; + eh->event_mask &= ~(FD_ADD_TRIAL_READ | FD_ADD_TRIAL_WRITE); + if ((mask & (FD_ADD_TRIAL_READ | FD_READ_WILL_BLOCK)) == FD_ADD_TRIAL_READ) + eh->OnEventHandlerRead(); + if ((mask & (FD_ADD_TRIAL_WRITE | FD_WRITE_WILL_BLOCK)) == FD_ADD_TRIAL_WRITE) + eh->OnEventHandlerWrite(); } -#endif -#ifdef USE_KQUEUE - struct kevent ke; - EV_SET(&ke, fd, ref[fd] & X_READBIT ? EVFILT_READ : EVFILT_WRITE, EV_DELETE, 0, 0, NULL); - int i = kevent(EngineHandle, &ke, 1, 0, 0, NULL); - if (i == -1) - { - log(DEBUG,"kqueue: Failed to remove socket from queue!"); +} + +bool SocketEngine::AddFdRef(EventHandler* eh) +{ + int fd = eh->GetFd(); + if (HasFd(fd)) return false; - } -#endif -#ifdef USE_EPOLL - struct epoll_event ev; - ref[fd] && X_READBIT ? ev.events = EPOLLIN | EPOLLET : ev.events = EPOLLOUT | EPOLLET; - ev.data.fd = fd; - int i = epoll_ctl(EngineHandle, EPOLL_CTL_DEL, fd, &ev); - if (i < 0) + + while (static_cast(fd) >= ref.size()) + ref.resize(ref.empty() ? 1 : (ref.size() * 2)); + ref[fd] = eh; + CurrentSetSize++; + return true; +} + +void SocketEngine::DelFdRef(EventHandler *eh) +{ + int fd = eh->GetFd(); + if (GetRef(fd) == eh) { - log(DEBUG,"epoll: List deletion failure!"); - return false; + ref[fd] = NULL; + CurrentSetSize--; } -#endif - CurrentSetSize--; - ref[fd] = 0; - return true; } -int SocketEngine::GetMaxFds() +bool SocketEngine::HasFd(int fd) { -#ifdef USE_SELECT - return FD_SETSIZE; -#endif -#ifdef USE_KQUEUE - return MAX_DESCRIPTORS; -#endif -#ifdef USE_EPOLL - return MAX_DESCRIPTORS; -#endif + return GetRef(fd) != NULL; +} + +EventHandler* SocketEngine::GetRef(int fd) +{ + if (fd < 0 || static_cast(fd) >= ref.size()) + return NULL; + return ref[fd]; +} + +bool SocketEngine::BoundsCheckFd(EventHandler* eh) +{ + return eh && eh->HasFd(); } -int SocketEngine::GetRemainingFds() + +int SocketEngine::Accept(EventHandler* fd, sockaddr *addr, socklen_t *addrlen) { -#ifdef USE_SELECT - return FD_SETSIZE - CurrentSetSize; + return accept(fd->GetFd(), addr, addrlen); +} + +int SocketEngine::Close(EventHandler* eh) +{ + DelFd(eh); + int ret = Close(eh->GetFd()); + eh->SetFd(-1); + return ret; +} + +int SocketEngine::Close(int fd) +{ +#ifdef _WIN32 + return closesocket(fd); +#else + return close(fd); #endif -#ifdef USE_KQUEUE - return MAX_DESCRIPTORS - CurrentSetSize; +} + +int SocketEngine::Blocking(int fd) +{ +#ifdef _WIN32 + unsigned long opt = 0; + return ioctlsocket(fd, FIONBIO, &opt); +#else + int flags = fcntl(fd, F_GETFL, 0); + return fcntl(fd, F_SETFL, flags & ~O_NONBLOCK); #endif -#ifdef USE_EPOLL - return MAX_DESCRIPTORS - CurrentSetSize; +} + +int SocketEngine::NonBlocking(int fd) +{ +#ifdef _WIN32 + unsigned long opt = 1; + return ioctlsocket(fd, FIONBIO, &opt); +#else + int flags = fcntl(fd, F_GETFL, 0); + return fcntl(fd, F_SETFL, flags | O_NONBLOCK); #endif } -int SocketEngine::Wait(int* fdlist) +void SocketEngine::SetReuse(int fd) { - int result = 0; -#ifdef USE_SELECT - FD_ZERO(&wfdset); - FD_ZERO(&rfdset); - timeval tval; - int sresult; - for (std::map::iterator a = fds.begin(); a != fds.end(); a++) - { - if (ref[a->second] & X_READBIT) - { - FD_SET (a->second, &rfdset); - } - else - { - FD_SET (a->second, &wfdset); - } - - } - tval.tv_sec = 0; - tval.tv_usec = 100L; - sresult = select(FD_SETSIZE, &rfdset, &wfdset, NULL, &tval); - if (sresult > 0) + int on = 1; + setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char*)&on, sizeof(on)); +} + +int SocketEngine::RecvFrom(EventHandler* fd, void *buf, size_t len, int flags, sockaddr *from, socklen_t *fromlen) +{ + int nbRecvd = recvfrom(fd->GetFd(), (char*)buf, len, flags, from, fromlen); + stats.UpdateReadCounters(nbRecvd); + return nbRecvd; +} + +int SocketEngine::Send(EventHandler* fd, const void *buf, size_t len, int flags) +{ + int nbSent = send(fd->GetFd(), (const char*)buf, len, flags); + stats.UpdateWriteCounters(nbSent); + return nbSent; +} + +int SocketEngine::Recv(EventHandler* fd, void *buf, size_t len, int flags) +{ + int nbRecvd = recv(fd->GetFd(), (char*)buf, len, flags); + stats.UpdateReadCounters(nbRecvd); + return nbRecvd; +} + +int SocketEngine::SendTo(EventHandler* fd, const void* buf, size_t len, int flags, const irc::sockets::sockaddrs& address) +{ + int nbSent = sendto(fd->GetFd(), (const char*)buf, len, flags, &address.sa, address.sa_size()); + stats.UpdateWriteCounters(nbSent); + return nbSent; +} + +int SocketEngine::WriteV(EventHandler* fd, const IOVector* iovec, int count) +{ + int sent = writev(fd->GetFd(), iovec, count); + stats.UpdateWriteCounters(sent); + return sent; +} + +#ifdef _WIN32 +int SocketEngine::WriteV(EventHandler* fd, const iovec* iovec, int count) +{ + // On Windows the fields in iovec are not in the order required by the Winsock API; IOVector has + // the fields in the correct order. + // Create temporary IOVectors from the iovecs and pass them to the WriteV() method that accepts the + // platform's native struct. + IOVector wiovec[128]; + count = std::min(count, static_cast(sizeof(wiovec) / sizeof(IOVector))); + + for (int i = 0; i < count; i++) { - for (std::map::iterator a = fds.begin(); a != fds.end(); a++) - { - if ((FD_ISSET (a->second, &rfdset)) || (FD_ISSET (a->second, &wfdset))) - fdlist[result++] = a->second; - } + wiovec[i].iov_len = iovec[i].iov_len; + wiovec[i].iov_base = reinterpret_cast(iovec[i].iov_base); } + return WriteV(fd, wiovec, count); +} #endif -#ifdef USE_KQUEUE - ts.tv_nsec = 10000L; - ts.tv_sec = 0; - int i = kevent(EngineHandle, NULL, 0, &ke_list[0], 65535, &ts); - for (int j = 0; j < i; j++) - fdlist[result++] = ke_list[j].ident; -#endif -#ifdef USE_EPOLL - int i = epoll_wait(EngineHandle, events, 65535, 100); - for (int j = 0; j < i; j++) - fdlist[result++] = events[j].data.fd; + +int SocketEngine::Connect(EventHandler* fd, const irc::sockets::sockaddrs& address) +{ + int ret = connect(fd->GetFd(), &address.sa, address.sa_size()); +#ifdef _WIN32 + if ((ret == SOCKET_ERROR) && (WSAGetLastError() == WSAEWOULDBLOCK)) + errno = EINPROGRESS; #endif - return result; + return ret; } -std::string SocketEngine::GetName() +int SocketEngine::Shutdown(EventHandler* fd, int how) { -#ifdef USE_SELECT - return "select"; -#endif -#ifdef USE_KQUEUE - return "kqueue"; + return shutdown(fd->GetFd(), how); +} + +int SocketEngine::Bind(int fd, const irc::sockets::sockaddrs& addr) +{ + return bind(fd, &addr.sa, addr.sa_size()); +} + +int SocketEngine::Listen(int sockfd, int backlog) +{ + return listen(sockfd, backlog); +} + +int SocketEngine::Shutdown(int fd, int how) +{ + return shutdown(fd, how); +} + +void SocketEngine::Statistics::UpdateReadCounters(int len_in) +{ + CheckFlush(); + + ReadEvents++; + if (len_in > 0) + indata += len_in; + else if (len_in < 0) + ErrorEvents++; +} + +void SocketEngine::Statistics::UpdateWriteCounters(int len_out) +{ + CheckFlush(); + + WriteEvents++; + if (len_out > 0) + outdata += len_out; + else if (len_out < 0) + ErrorEvents++; +} + +void SocketEngine::Statistics::CheckFlush() const +{ + // Reset the in/out byte counters if it has been more than a second + time_t now = ServerInstance->Time(); + if (lastempty != now) + { + lastempty = now; + indata = outdata = 0; + } +} + +void SocketEngine::Statistics::GetBandwidth(float& kbitpersec_in, float& kbitpersec_out, float& kbitpersec_total) const +{ + CheckFlush(); + float in_kbit = indata * 8; + float out_kbit = outdata * 8; + kbitpersec_total = ((in_kbit + out_kbit) / 1024); + kbitpersec_in = in_kbit / 1024; + kbitpersec_out = out_kbit / 1024; +} + +std::string SocketEngine::LastError() +{ +#ifndef _WIN32 + return strerror(errno); +#else + char szErrorString[500]; + DWORD dwErrorCode = WSAGetLastError(); + if (FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, dwErrorCode, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPSTR)szErrorString, _countof(szErrorString), NULL) == 0) + sprintf_s(szErrorString, _countof(szErrorString), "Error code: %u", dwErrorCode); + + std::string::size_type p; + std::string ret = szErrorString; + while ((p = ret.find_last_of("\r\n")) != std::string::npos) + ret.erase(p, 1); + + return ret; #endif -#ifdef USE_EPOLL - return "epoll"; +} + +std::string SocketEngine::GetError(int errnum) +{ +#ifndef _WIN32 + return strerror(errnum); +#else + WSASetLastError(errnum); + return LastError(); #endif - return "misconfigured"; }