1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd: (C) 2002-2008 InspIRCd Development Team
6 * See: http://www.inspircd.org/wiki/index.php/Credits
8 * This program is free but copyrighted software; see
9 * the file COPYING for details.
11 * ---------------------------------------------------
15 #include "exitcodes.h"
16 #include <sys/epoll.h>
17 #include "socketengines/socketengine_epoll.h"
20 EPollEngine::EPollEngine(InspIRCd* Instance) : SocketEngine(Instance)
23 // This is not a maximum, just a hint at the eventual number of sockets that may be polled.
24 EngineHandle = epoll_create(GetMaxFds() / 4);
26 if (EngineHandle == -1)
28 ServerInstance->Logs->Log("SOCKET",DEFAULT, "ERROR: Could not initialize socket engine: %s", strerror(errno));
29 ServerInstance->Logs->Log("SOCKET",DEFAULT, "ERROR: Your kernel probably does not have the proper features. This is a fatal error, exiting now.");
30 printf("ERROR: Could not initialize socket engine: %s\n", strerror(errno));
31 printf("ERROR: Your kernel probably does not have the proper features. This is a fatal error, exiting now.\n");
32 ServerInstance->Exit(EXIT_STATUS_SOCKETENGINE);
36 ref = new EventHandler* [GetMaxFds()];
37 events = new struct epoll_event[GetMaxFds()];
39 memset(ref, 0, GetMaxFds() * sizeof(EventHandler*));
42 EPollEngine::~EPollEngine()
44 this->Close(EngineHandle);
49 bool EPollEngine::AddFd(EventHandler* eh)
52 if ((fd < 0) || (fd > GetMaxFds() - 1))
54 ServerInstance->Logs->Log("SOCKET",DEBUG,"AddFd out of range: (fd: %d, max: %d)", fd, GetMaxFds());
58 if (GetRemainingFds() <= 1)
60 ServerInstance->Logs->Log("SOCKET",DEBUG,"No remaining FDs cannot add fd: %d", fd);
66 ServerInstance->Logs->Log("SOCKET",DEBUG,"Attempt to add duplicate fd: %d", fd);
70 struct epoll_event ev;
71 memset(&ev,0,sizeof(struct epoll_event));
72 eh->Readable() ? ev.events = EPOLLIN : ev.events = EPOLLOUT;
74 int i = epoll_ctl(EngineHandle, EPOLL_CTL_ADD, fd, &ev);
77 ServerInstance->Logs->Log("SOCKET",DEBUG,"Error adding fd: %d to socketengine: %s", fd, strerror(errno));
81 ServerInstance->Logs->Log("SOCKET",DEBUG,"New file descriptor: %d", fd);
88 void EPollEngine::WantWrite(EventHandler* eh)
90 /** Use oneshot so that the system removes the writeable
91 * status for us and saves us a call.
93 struct epoll_event ev;
94 memset(&ev,0,sizeof(struct epoll_event));
96 ev.data.fd = eh->GetFd();
97 epoll_ctl(EngineHandle, EPOLL_CTL_MOD, eh->GetFd(), &ev);
100 bool EPollEngine::DelFd(EventHandler* eh, bool force)
102 int fd = eh->GetFd();
103 if ((fd < 0) || (fd > GetMaxFds() - 1))
105 ServerInstance->Logs->Log("SOCKET",DEBUG,"DelFd out of range: (fd: %d, max: %d)", fd, GetMaxFds());
109 struct epoll_event ev;
110 memset(&ev,0,sizeof(struct epoll_event));
111 eh->Readable() ? ev.events = EPOLLIN : ev.events = EPOLLOUT;
113 int i = epoll_ctl(EngineHandle, EPOLL_CTL_DEL, fd, &ev);
117 ServerInstance->Logs->Log("SOCKET",DEBUG,"Cant remove socket: %s", strerror(errno));
124 ServerInstance->Logs->Log("SOCKET",DEBUG,"Remove file descriptor: %d", fd);
128 int EPollEngine::GetMaxFds()
131 return MAX_DESCRIPTORS;
133 int max = ulimit(4, 0);
136 MAX_DESCRIPTORS = max;
141 ServerInstance->Logs->Log("SOCKET", DEFAULT, "ERROR: Can't determine maximum number of open sockets!");
142 printf("ERROR: Can't determine maximum number of open sockets!\n");
143 ServerInstance->Exit(EXIT_STATUS_SOCKETENGINE);
148 int EPollEngine::GetRemainingFds()
150 return GetMaxFds() - CurrentSetSize;
153 int EPollEngine::DispatchEvents()
157 int i = epoll_wait(EngineHandle, events, GetMaxFds() - 1, 1000);
161 for (int j = 0; j < i; j++)
163 if (events[j].events & EPOLLHUP)
166 if (ref[events[j].data.fd])
167 ref[events[j].data.fd]->HandleEvent(EVENT_ERROR, 0);
170 if (events[j].events & EPOLLERR)
173 /* Get error number */
174 if (getsockopt(events[j].data.fd, SOL_SOCKET, SO_ERROR, &errcode, &codesize) < 0)
176 if (ref[events[j].data.fd])
177 ref[events[j].data.fd]->HandleEvent(EVENT_ERROR, errcode);
180 if (events[j].events & EPOLLOUT)
183 struct epoll_event ev;
184 memset(&ev,0,sizeof(struct epoll_event));
186 ev.data.fd = events[j].data.fd;
187 epoll_ctl(EngineHandle, EPOLL_CTL_MOD, events[j].data.fd, &ev);
188 if (ref[events[j].data.fd])
189 ref[events[j].data.fd]->HandleEvent(EVENT_WRITE);
194 if (ref[events[j].data.fd])
195 ref[events[j].data.fd]->HandleEvent(EVENT_READ);
202 std::string EPollEngine::GetName()