1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd: (C) 2002-2009 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 "socketengines/socketengine_epoll.h"
19 EPollEngine::EPollEngine(InspIRCd* Instance) : SocketEngine(Instance)
22 // This is not a maximum, just a hint at the eventual number of sockets that may be polled.
23 EngineHandle = epoll_create(GetMaxFds() / 4);
25 if (EngineHandle == -1)
27 ServerInstance->Logs->Log("SOCKET",DEFAULT, "ERROR: Could not initialize socket engine: %s", strerror(errno));
28 ServerInstance->Logs->Log("SOCKET",DEFAULT, "ERROR: Your kernel probably does not have the proper features. This is a fatal error, exiting now.");
29 printf("ERROR: Could not initialize socket engine: %s\n", strerror(errno));
30 printf("ERROR: Your kernel probably does not have the proper features. This is a fatal error, exiting now.\n");
31 ServerInstance->Exit(EXIT_STATUS_SOCKETENGINE);
35 ref = new EventHandler* [GetMaxFds()];
36 events = new struct epoll_event[GetMaxFds()];
38 memset(ref, 0, GetMaxFds() * sizeof(EventHandler*));
41 EPollEngine::~EPollEngine()
43 this->Close(EngineHandle);
48 bool EPollEngine::AddFd(EventHandler* eh)
51 if ((fd < 0) || (fd > GetMaxFds() - 1))
53 ServerInstance->Logs->Log("SOCKET",DEBUG,"AddFd out of range: (fd: %d, max: %d)", fd, GetMaxFds());
57 if (GetRemainingFds() <= 1)
59 ServerInstance->Logs->Log("SOCKET",DEBUG,"No remaining FDs cannot add fd: %d", fd);
65 ServerInstance->Logs->Log("SOCKET",DEBUG,"Attempt to add duplicate fd: %d", fd);
69 struct epoll_event ev;
70 memset(&ev,0,sizeof(ev));
71 eh->Readable() ? ev.events = EPOLLIN : ev.events = EPOLLOUT;
73 int i = epoll_ctl(EngineHandle, EPOLL_CTL_ADD, fd, &ev);
76 ServerInstance->Logs->Log("SOCKET",DEBUG,"Error adding fd: %d to socketengine: %s", fd, strerror(errno));
80 ServerInstance->Logs->Log("SOCKET",DEBUG,"New file descriptor: %d", fd);
87 void EPollEngine::WantWrite(EventHandler* eh)
89 /** Use oneshot so that the system removes the writeable
90 * status for us and saves us a call.
92 struct epoll_event ev;
93 memset(&ev,0,sizeof(ev));
94 ev.events = EPOLLIN | EPOLLOUT;
95 ev.data.fd = eh->GetFd();
96 epoll_ctl(EngineHandle, EPOLL_CTL_MOD, eh->GetFd(), &ev);
99 bool EPollEngine::DelFd(EventHandler* eh, bool force)
101 int fd = eh->GetFd();
102 if ((fd < 0) || (fd > GetMaxFds() - 1))
104 ServerInstance->Logs->Log("SOCKET",DEBUG,"DelFd out of range: (fd: %d, max: %d)", fd, GetMaxFds());
108 struct epoll_event ev;
109 memset(&ev,0,sizeof(ev));
110 eh->Readable() ? ev.events = EPOLLIN : ev.events = EPOLLOUT;
112 int i = epoll_ctl(EngineHandle, EPOLL_CTL_DEL, fd, &ev);
116 ServerInstance->Logs->Log("SOCKET",DEBUG,"Cant remove socket: %s", strerror(errno));
123 ServerInstance->Logs->Log("SOCKET",DEBUG,"Remove file descriptor: %d", fd);
127 int EPollEngine::GetMaxFds()
130 return MAX_DESCRIPTORS;
132 int max = ulimit(4, 0);
135 MAX_DESCRIPTORS = max;
140 ServerInstance->Logs->Log("SOCKET", DEFAULT, "ERROR: Can't determine maximum number of open sockets!");
141 printf("ERROR: Can't determine maximum number of open sockets!\n");
142 ServerInstance->Exit(EXIT_STATUS_SOCKETENGINE);
147 int EPollEngine::GetRemainingFds()
149 return GetMaxFds() - CurrentSetSize;
152 int EPollEngine::DispatchEvents()
154 socklen_t codesize = sizeof(int);
156 int i = epoll_wait(EngineHandle, events, GetMaxFds() - 1, 1000);
160 for (int j = 0; j < i; j++)
162 if (events[j].events & EPOLLHUP)
165 if (ref[events[j].data.fd])
166 ref[events[j].data.fd]->HandleEvent(EVENT_ERROR, 0);
169 if (events[j].events & EPOLLERR)
172 /* Get error number */
173 if (getsockopt(events[j].data.fd, SOL_SOCKET, SO_ERROR, &errcode, &codesize) < 0)
175 if (ref[events[j].data.fd])
176 ref[events[j].data.fd]->HandleEvent(EVENT_ERROR, errcode);
179 if (events[j].events & EPOLLOUT)
182 struct epoll_event ev;
183 memset(&ev,0,sizeof(ev));
185 ev.data.fd = events[j].data.fd;
186 epoll_ctl(EngineHandle, EPOLL_CTL_MOD, events[j].data.fd, &ev);
187 if (ref[events[j].data.fd])
188 ref[events[j].data.fd]->HandleEvent(EVENT_WRITE);
193 if (ref[events[j].data.fd])
194 ref[events[j].data.fd]->HandleEvent(EVENT_READ);
201 std::string EPollEngine::GetName()