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/*
*
* (C) 2003-2012 Anope Team
* Contact us at team@anope.org
*
* Please read COPYING and README for further details.
*
* Based on the original code of Epona by Lara.
* Based on the original code of Services by Andy Church.
*/
#include "services.h"
#include "anope.h"
#include "socketengine.h"
#include "sockets.h"
#include "logger.h"
#include "config.h"
#include <sys/types.h>
#include <sys/event.h>
#include <sys/time.h>
#include <errno.h>
static int kq_fd, max_fds;
static struct kevent *change_events, *event_events;
static int change_count;
static struct kevent *GetChangeEvent()
{
if (change_count == max_fds)
{
timespec zero_timespec = { 0, 0 };
for (int i = 0; i < change_count; ++i)
kevent(kq_fd, &change_events[i], 1, NULL, 0, &zero_timespec);
change_count = 0;
}
return &change_events[change_count++];
}
void SocketEngine::Init()
{
kq_fd = kqueue();
max_fds = getdtablesize();
if (kq_fd < 0)
throw SocketException("Unable to create kqueue engine: " + Anope::LastError());
else if (max_fds <= 0)
throw SocketException("Can't determine maximum number of open sockets");
change_events = new struct kevent[max_fds];
event_events = new struct kevent[max_fds];
change_count = 0;
}
void SocketEngine::Shutdown()
{
Process();
for (std::map<int, Socket *>::const_iterator it = Sockets.begin(), it_end = Sockets.end(); it != it_end;)
{
Socket *s = it->second;
++it;
delete s;
}
Sockets.clear();
delete [] change_events;
delete [] event_events;
}
void SocketEngine::AddSocket(Socket *s)
{
struct kevent *event = GetChangeEvent();
EV_SET(event, s->GetFD(), EVFILT_READ, EV_ADD, 0, 0, NULL);
Sockets.insert(std::make_pair(s->GetFD(), s));
}
void SocketEngine::DelSocket(Socket *s)
{
struct kevent *event = GetChangeEvent();
EV_SET(event, s->GetFD(), EVFILT_READ, EV_DELETE, 0, 0, NULL);
event = GetChangeEvent();
EV_SET(event, s->GetFD(), EVFILT_WRITE, EV_DELETE, 0, 0, NULL);
Sockets.erase(s->GetFD());
}
void SocketEngine::MarkWritable(Socket *s)
{
if (s->HasFlag(SF_WRITABLE))
return;
struct kevent *event = GetChangeEvent();
EV_SET(event, s->GetFD(), EVFILT_WRITE, EV_ADD, 0, 0, NULL);
s->SetFlag(SF_WRITABLE);
}
void SocketEngine::ClearWritable(Socket *s)
{
if (!s->HasFlag(SF_WRITABLE))
return;
struct kevent *event = GetChangeEvent();
EV_SET(event, s->GetFD(), EVFILT_WRITE, EV_DELETE, 0, 0, NULL);
s->UnsetFlag(SF_WRITABLE);
}
void SocketEngine::Process()
{
static timespec kq_timespec = { Config->ReadTimeout, 0 };
int total = kevent(kq_fd, change_events, change_count, event_events, max_fds, &kq_timespec);
change_count = 0;
Anope::CurTime = time(NULL);
/* EINTR can be given if the read timeout expires */
if (total == -1)
{
if (errno != EINTR)
Log() << "SockEngine::Process(): error: " << Anope::LastError();
return;
}
for (int i = 0; i < total; ++i)
{
struct kevent *event = &event_events[i];
if (event->flags & EV_ERROR)
continue;
std::map<int, Socket *>::iterator it = Sockets.find(event->ident);
if (it == Sockets.end())
continue;
Socket *s = it->second;
if (event->flags & EV_EOF)
{
s->ProcessError();
s->SetFlag(SF_DEAD);
delete s;
continue;
}
if (!s->Process())
continue;
if (event->filter == EVFILT_READ && !s->ProcessRead())
s->SetFlag(SF_DEAD);
else if (event->filter == EVFILT_WRITE && !s->ProcessWrite())
s->SetFlag(SF_DEAD);
if (s->HasFlag(SF_DEAD))
delete s;
}
}
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