Helps if I add the w32 specific code, too. :p

git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@7044 e03df62e-2008-0410-955e-edbf42e46eb7

1 files changed, 323 insertions, 0 deletions

diff --git a/src/socketengine_iocp.cpp b/src/socketengine_iocp.cpp
new file mode 100644
index 000000000..947b518b6
--- /dev/null
+++ b/src/socketengine_iocp.cpp
@@ -0,0 +1,323 @@
+/*       +------------------------------------+
+ *       | Inspire Internet Relay Chat Daemon |
+ *       +------------------------------------+
+ *
+ *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
+ * See: http://www.inspircd.org/wiki/index.php/Credits
+ *
+ * This program is free but copyrighted software; see
+ *            the file COPYING for details.
+ *
+ * ---------------------------------------------------
+ */

+

+#include "socketengine_iocp.h"

+#include <mswsock.h>

+#include <assert.h>

+

+IOCPEngine::IOCPEngine(InspIRCd * Instance) : SocketEngine(Instance)

+{

+	// Create completion port

+	m_completionPort = CreateIoCompletionPort(INVALID_HANDLE_VALUE, NULL, (ULONG_PTR)0, 0);

+

+	// Null variables out.

+	CurrentSetSize = 0;

+	EngineHandle = 0;

+	memset(ref, 0, sizeof(EventHandler*) * MAX_DESCRIPTORS);

+}

+

+IOCPEngine::~IOCPEngine()

+{

+	CloseHandle(m_completionPort);

+};

+

+bool IOCPEngine::AddFd(EventHandler* eh)

+{

+	int fake_fd = GenerateFd();

+	int is_accept = 0;

+	int opt_len = sizeof(int);

+	if(fake_fd < 0)

+		return false;

+

+	// are we a listen socket?

+	getsockopt(eh->GetFd(), SOL_SOCKET, SO_ACCEPTCONN, (char*)&is_accept, &opt_len);

+

+	// set up the read event so the socket can actually receive data :P

+	eh->m_internalFd = fake_fd;

+	eh->m_writeEvent = 0;

+	eh->m_acceptEvent = 0;

+

+	// assign the socket to the completion port

+	if(!CreateIoCompletionPort((HANDLE)eh->GetFd(), m_completionPort, (ULONG_PTR)eh->m_internalFd, 0))

+		return false;

+

+	// set up binding, increase set size

+	ref[fake_fd] = eh;

+	++CurrentSetSize;

+

+	// setup initial events

+	if(is_accept)

+		PostAcceptEvent(eh);

+	else

+		PostReadEvent(eh);

+

+	// log message

+	ServerInstance->Log(DEBUG, "New fake fd: %u, real fd: %u, address 0x%p", fake_fd, eh->GetFd(), eh);

+

+	// post a write event if there is data to be written

+	if(eh->Writeable())

+		WantWrite(eh);

+

+	// we're all good =)

+	m_binding.insert( map<int, EventHandler*>::value_type( eh->GetFd(), eh ) );

+	return true;

+}

+

+bool IOCPEngine::DelFd(EventHandler* eh, bool force /* = false */)

+{

+	int fake_fd = eh->m_internalFd;

+	int fd = eh->GetFd();

+	

+	if(ref[fake_fd] == 0)

+		return false;

+

+	ServerInstance->Log(DEBUG, "Removing fake fd %u, real fd %u, address 0x%p", fake_fd, eh->GetFd(), eh);

+

+	// Cancel pending i/o operations.

+	assert(CancelIo((HANDLE)fd) == TRUE);

+

+	// Free the buffer, and delete the event.

+	if(eh->m_readEvent != 0)

+		delete ((Overlapped*)eh->m_readEvent);

+

+	if(eh->m_writeEvent != 0)

+		delete ((Overlapped*)eh->m_writeEvent);

+

+	if(eh->m_acceptEvent != 0)

+	{

+		delete ((accept_overlap*)((Overlapped*)eh->m_acceptEvent)->m_params);

+		delete ((Overlapped*)eh->m_acceptEvent);

+	}

+

+	// Clear binding

+	ref[fake_fd] = 0;

+	m_binding.erase(eh->GetFd());

+

+	// decrement set size

+	--CurrentSetSize;

+	

+	// success

+	return true;

+}

+

+void IOCPEngine::WantWrite(EventHandler* eh)

+{

+	// Post event - write begin

+	if(!eh->m_writeEvent)

+	{

+		Overlapped * ov = new Overlapped(SOCKET_IO_EVENT_WRITE_READY, 0);

+		eh->m_writeEvent = (void*)ov;

+		PostQueuedCompletionStatus(m_completionPort, 0, (ULONG_PTR)eh->m_internalFd, &ov->m_overlap);

+	}

+}

+

+bool IOCPEngine::PostCompletionEvent(EventHandler * eh, SocketIOEvent type, int param)

+{

+	Overlapped * ov = new Overlapped(type, param);

+	return PostQueuedCompletionStatus(m_completionPort, 0, (ULONG_PTR)eh->m_internalFd, &ov->m_overlap);

+}

+

+void IOCPEngine::PostReadEvent(EventHandler * eh)

+{

+	Overlapped * ov = new Overlapped(SOCKET_IO_EVENT_READ_READY, 0);

+	DWORD flags = 0;

+	DWORD r_length = 0;

+	WSABUF buf;

+

+	// by passing a null buffer pointer, we can have this working in the same way as epoll..

+	// its slower, but it saves modifying all network code.

+	buf.buf = 0;

+	buf.len = 0;

+

+	// determine socket type.

+	DWORD sock_type;

+	int sock_len = sizeof(DWORD);

+	if(getsockopt(eh->GetFd(), SOL_SOCKET, SO_TYPE, (char*)&sock_type, &sock_len) == -1)

+	{

+		// wtfhax?

+		PostCompletionEvent(eh, SOCKET_IO_EVENT_ERROR, 0);

+		delete ov;

+		return;

+	}

+	switch(sock_type)

+	{

+	case SOCK_DGRAM:			// UDP Socket

+		{

+			if(WSARecvFrom(eh->GetFd(), &buf, 1, &r_length, &flags, 0, 0, &ov->m_overlap, 0))

+			{

+				int err = WSAGetLastError();

+				if(WSAGetLastError() != WSA_IO_PENDING)

+				{

+					delete ov;

+					PostCompletionEvent(eh, SOCKET_IO_EVENT_ERROR, 0);

+					return;

+				}

+			}

+		}break;

+

+	case SOCK_STREAM:			// TCP Socket

+		{

+			if(WSARecv(eh->GetFd(), &buf, 1, &r_length, &flags, &ov->m_overlap, 0) == SOCKET_ERROR)

+			{

+				if(WSAGetLastError() != WSA_IO_PENDING)

+				{

+					delete ov;

+					PostCompletionEvent(eh, SOCKET_IO_EVENT_ERROR, 0);

+					return;

+				}

+			}

+		}break;

+

+	default:

+		{

+			printf("unknwon socket type: %u\n", sock_type);

+			assert(false);

+		}break;

+	}

+	eh->m_readEvent = (void*)ov;

+}

+

+int IOCPEngine::DispatchEvents()

+{

+	DWORD len;

+	LPOVERLAPPED overlap;

+	Overlapped * ov;

+	EventHandler * eh;

+	int intfd;

+	int ret;

+	unsigned long bytes_recv;

+

+	while(GetQueuedCompletionStatus(m_completionPort, &len, (PULONG_PTR)&intfd, &overlap, 100))

+	{

+		// woot, we got an event on a socket :P

+		eh = ref[intfd];

+		ov = CONTAINING_RECORD(overlap, Overlapped, m_overlap);

+		if(eh == 0) continue;

+		switch(ov->m_event)

+		{

+		case SOCKET_IO_EVENT_WRITE_READY:

+			{

+				eh->m_writeEvent = 0;

+				eh->HandleEvent(EVENT_WRITE, 0);

+			}break;

+

+		case SOCKET_IO_EVENT_READ_READY:

+			{

+				ret = ioctlsocket(eh->GetFd(), FIONREAD, &bytes_recv);

+				eh->m_readEvent = 0;

+				if(ret != 0 || bytes_recv == 0)

+				{

+					// end of file

+					PostCompletionEvent(eh, SOCKET_IO_EVENT_ERROR, EIO);

+				}

+				else

+				{

+					eh->HandleEvent(EVENT_READ, 0);

+					PostReadEvent(eh);

+				}

+			}break;

+		

+		case SOCKET_IO_EVENT_ACCEPT:

+			{

+				/* this is kinda messy.. :/ */

+				eh->HandleEvent(EVENT_READ, ov->m_params);

+				delete ((accept_overlap*)ov->m_params);

+				eh->m_acceptEvent = 0;

+				PostAcceptEvent(eh);

+			}break;

+

+		case SOCKET_IO_EVENT_ERROR:

+			{

+				eh->HandleEvent(EVENT_ERROR, ov->m_params);

+			}break;

+		}

+		

+		delete ov;

+	}

+

+	return 0;

+}

+

+void IOCPEngine::PostAcceptEvent(EventHandler * eh)

+{

+	int fd = WSASocket(AF_INET, SOCK_STREAM, 0, 0, 0, WSA_FLAG_OVERLAPPED);

+	int len = sizeof(sockaddr_in) + 16;

+	DWORD dwBytes;

+	accept_overlap * ao = new accept_overlap;

+	memset(ao->buf, 0, 1024);

+	ao->socket = fd;

+

+	Overlapped * ov = new Overlapped(SOCKET_IO_EVENT_ACCEPT, (int)ao);

+	eh->m_acceptEvent = (void*)ov;

+

+	if(AcceptEx(eh->GetFd(), fd, ao->buf, 0, len, len, &dwBytes, &ov->m_overlap) == FALSE)

+	{

+		int err = WSAGetLastError();

+		if(err != WSA_IO_PENDING)

+		{

+			printf("PostAcceptEvent err: %d\n", err);

+		}

+	}

+}

+

+

+std::string IOCPEngine::GetName()

+{

+	return "iocp";

+}

+

+int __accept_socket(SOCKET s, sockaddr * addr, int * addrlen, void * acceptevent)

+{

+	Overlapped * ovl = (Overlapped*)acceptevent;

+	accept_overlap * ov = (accept_overlap*)ovl->m_params;
+
+	sockaddr_in * server_address = (sockaddr_in*)&ov->buf[10];
+	sockaddr_in * client_address = (sockaddr_in*)&ov->buf[38];
+
+	memcpy(addr, client_address, sizeof(sockaddr_in));
+	*addrlen = sizeof(sockaddr_in);
+
+	return ov->socket;
+}
+
+int __getsockname(SOCKET s, sockaddr * name, int * namelen, void * acceptevent)
+{
+	Overlapped * ovl = (Overlapped*)acceptevent;

+	accept_overlap * ov = (accept_overlap*)ovl->m_params;
+
+	sockaddr_in * server_address = (sockaddr_in*)&ov->buf[10];
+	sockaddr_in * client_address = (sockaddr_in*)&ov->buf[38];
+
+	memcpy(name, server_address, sizeof(sockaddr_in));
+	*namelen = sizeof(sockaddr_in);
+
+	return 0;
+}
+
+EventHandler * IOCPEngine::GetRef(int fd)
+{
+	map<int, EventHandler*>::iterator itr = m_binding.find(fd);
+	return (itr == m_binding.end()) ? 0 : itr->second;
+}
+
+bool IOCPEngine::HasFd(int fd)
+{
+	return (GetRef(fd) != 0);
+}
+
+EventHandler * IOCPEngine::GetIntRef(int fd)
+{
+	if(fd < 0 || fd > MAX_DESCRIPTORS)
+		return 0;
+	return ref[fd];
+}