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/*
*
* (C) 2003-2022 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 "logger.h"
#include "config.h"
#ifdef _AIX
# undef FD_ZERO
# define FD_ZERO(p) memset((p), 0, sizeof(*(p)))
#endif /* _AIX */
static int MaxFD;
static unsigned FDCount;
static fd_set ReadFDs;
static fd_set WriteFDs;
void SocketEngine::Init()
{
FD_ZERO(&ReadFDs);
FD_ZERO(&WriteFDs);
}
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)
{
if (s->GetFD() > MaxFD)
MaxFD = s->GetFD();
if (s->flags[SF_READABLE])
FD_SET(s->GetFD(), &ReadFDs);
if (s->flags[SF_WRITABLE])
FD_SET(s->GetFD(), &WriteFDs);
++FDCount;
}
else if (before_registered && !now_registered)
{
if (s->GetFD() == MaxFD)
--MaxFD;
FD_CLR(s->GetFD(), &ReadFDs);
FD_CLR(s->GetFD(), &WriteFDs);
--FDCount;
}
else if (before_registered && now_registered)
{
if (s->flags[SF_READABLE])
FD_SET(s->GetFD(), &ReadFDs);
else
FD_CLR(s->GetFD(), &ReadFDs);
if (s->flags[SF_WRITABLE])
FD_SET(s->GetFD(), &WriteFDs);
else
FD_CLR(s->GetFD(), &WriteFDs);
}
}
void SocketEngine::Process()
{
fd_set rfdset = ReadFDs, wfdset = WriteFDs, efdset = ReadFDs;
timeval tval;
tval.tv_sec = Config->ReadTimeout;
tval.tv_usec = 0;
#ifdef _WIN32
/* We can use the socket engine to "sleep" services for a period of
* time between connections to the uplink, which allows modules,
* timers, etc to function properly. Windows, being as useful as it is,
* does not allow to select() on 0 sockets and will immediately return error.
* Thus:
*/
if (FDCount == 0)
{
sleep(tval.tv_sec);
return;
}
#endif
int sresult = select(MaxFD + 1, &rfdset, &wfdset, &efdset, &tval);
Anope::CurTime = time(NULL);
if (sresult == -1)
{
Log() << "SockEngine::Process(): error: " << Anope::LastError();
}
else if (sresult)
{
int processed = 0;
for (std::map<int, Socket *>::const_iterator it = Sockets.begin(), it_end = Sockets.end(); it != it_end && processed != sresult;)
{
Socket *s = it->second;
++it;
bool has_read = FD_ISSET(s->GetFD(), &rfdset), has_write = FD_ISSET(s->GetFD(), &wfdset), has_error = FD_ISSET(s->GetFD(), &efdset);
if (has_read || has_write || has_error)
++processed;
if (has_error)
{
s->ProcessError();
delete s;
continue;
}
if (!s->Process())
{
if (s->flags[SF_DEAD])
delete s;
continue;
}
if (has_read && !s->ProcessRead())
s->flags[SF_DEAD] = true;
if (has_write && !s->ProcessWrite())
s->flags[SF_DEAD] = true;
if (s->flags[SF_DEAD])
delete s;
}
}
}
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