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/*
*
* (C) 2003-2013 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 "sockets.h"
#include "socketengine.h"
#include "config.h"
#include <errno.h>
#ifndef _WIN32
# include <sys/poll.h>
# include <poll.h>
# include <sys/types.h>
# include <sys/time.h>
# include <sys/resource.h>
# ifndef POLLRDHUP
# define POLLRDHUP 0
# endif
#else
# define poll WSAPoll
# define POLLRDHUP POLLHUP
#endif
static std::vector<pollfd> events;
static std::map<int, unsigned> socket_positions;
void SocketEngine::Init()
{
events.resize(DefaultSize);
}
void SocketEngine::Shutdown()
{
while (!Sockets.empty())
delete Sockets.begin()->second;
}
void SocketEngine::Change(Socket *s, bool set, SocketFlag flag)
{
if (set == s->flags[flag])
return;
bool before_registered = s->flags[SF_READABLE] || s->flags[SF_WRITABLE];
s->flags[flag] = set;
bool now_registered = s->flags[SF_READABLE] || s->flags[SF_WRITABLE];
if (!before_registered && now_registered)
{
pollfd ev;
memset(&ev, 0, sizeof(ev));
ev.fd = s->GetFD();
ev.events = (s->flags[SF_READABLE] ? POLLIN : 0) | (s->flags[SF_WRITABLE] ? POLLOUT : 0);
socket_positions[ev.fd] = events.size();
events.push_back(ev);
}
else if (before_registered && !now_registered)
{
std::map<int, unsigned>::iterator pos = socket_positions.find(s->GetFD());
if (pos == socket_positions.end())
throw SocketException("Unable to remove fd " + stringify(s->GetFD()) + " from poll, it does not exist?");
if (pos->second != events.size() - 1)
{
pollfd &ev = events[pos->second],
&last_ev = events[events.size() - 1];
ev = last_ev;
socket_positions[ev.fd] = pos->second;
}
socket_positions.erase(pos);
events.pop_back();
}
else if (before_registered && now_registered)
{
std::map<int, unsigned>::iterator pos = socket_positions.find(s->GetFD());
if (pos == socket_positions.end())
throw SocketException("Unable to modify fd " + stringify(s->GetFD()) + " in poll, it does not exist?");
pollfd &ev = events[pos->second];
ev.events = (s->flags[SF_READABLE] ? POLLIN : 0) | (s->flags[SF_WRITABLE] ? POLLOUT : 0);
}
}
void SocketEngine::Process()
{
int total = poll(&events.front(), events.size(), Config->ReadTimeout * 1000);
Anope::CurTime = time(NULL);
/* EINTR can be given if the read timeout expires */
if (total < 0)
{
if (errno != EINTR)
Log() << "SockEngine::Process(): error: " << Anope::LastError();
return;
}
for (unsigned i = 0, processed = 0; i < events.size() && processed != static_cast<unsigned>(total); ++i)
{
pollfd *ev = &events[i];
if (ev->revents != 0)
++processed;
std::map<int, Socket *>::iterator it = Sockets.find(ev->fd);
if (it == Sockets.end())
continue;
Socket *s = it->second;
if (ev->revents & (POLLERR | POLLRDHUP))
{
s->ProcessError();
delete s;
continue;
}
if (!s->Process())
{
if (s->flags[SF_DEAD])
delete s;
continue;
}
if ((ev->revents & POLLIN) && !s->ProcessRead())
s->flags[SF_DEAD] = true;
if ((ev->revents & POLLOUT) && !s->ProcessWrite())
s->flags[SF_DEAD] = true;
if (s->flags[SF_DEAD])
delete s;
}
}
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