OOPS! We try again, since I'm smoking craq. LF is 0x0a NOT CR.

git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@7456 e03df62e-2008-0410-955e-edbf42e46eb7

1 files changed, 376 insertions, 1 deletions

diff --git a/src/socketengine_iocp.cpp b/src/socketengine_iocp.cpp
index 833bc097f..89fd8717f 100644
--- a/src/socketengine_iocp.cpp
+++ b/src/socketengine_iocp.cpp
@@ -1 +1,376 @@
-/*       +------------------------------------+
 *       | 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>

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(eh->GetFd());
	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;

	unsigned long completion_key = (ULONG_PTR)eh->m_internalFd;
	/* assign the socket to the completion port */
	if(!CreateIoCompletionPort((HANDLE)eh->GetFd(), m_completionPort, completion_key, 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 =) */
	try
	{
		m_binding.insert( map<int, EventHandler*>::value_type( eh->GetFd(), eh ) );
	}
	catch (...)
	{
		/* Ohshi-, map::insert failed :/ */
		return false;
	}

	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. */
	if (CancelIo((HANDLE)fd) == FALSE)
		return false;

	/* Free the buffer, and delete the event. */
	if(eh->m_readEvent != 0)
	{
		if(((Overlapped*)eh->m_readEvent)->m_params != 0)
			delete ((udp_overlap*)((Overlapped*)eh->m_readEvent)->m_params);

		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)
	{
		ULONG_PTR completion_key = (ULONG_PTR)eh->m_internalFd;
		Overlapped * ov = new Overlapped(SOCKET_IO_EVENT_WRITE_READY, 0);
		eh->m_writeEvent = (void*)ov;
		PostQueuedCompletionStatus(m_completionPort, 0, completion_key, &ov->m_overlap);
	}
}

bool IOCPEngine::PostCompletionEvent(EventHandler * eh, SocketIOEvent type, int param)
{
	Overlapped * ov = new Overlapped(type, param);
	ULONG_PTR completion_key = (ULONG_PTR)eh->m_internalFd;
	return PostQueuedCompletionStatus(m_completionPort, 0, completion_key, &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 */
		{
			udp_overlap * uv = new udp_overlap;
			uv->udp_sockaddr_len = sizeof(sockaddr);
			buf.buf = (char*)uv->udp_buffer;
			buf.len = sizeof(uv->udp_buffer);
			ov->m_params = (unsigned long)uv;
			if(WSARecvFrom(eh->GetFd(), &buf, 1, &uv->udp_len, &flags, uv->udp_sockaddr, (LPINT)&uv->udp_sockaddr_len, &ov->m_overlap, 0))
			{
				int err = WSAGetLastError();
				if(err != 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);
			return;
		}
		break;
	}
	eh->m_readEvent = (void*)ov;
}

int IOCPEngine::DispatchEvents()
{
	DWORD len;
	LPOVERLAPPED overlap;
	Overlapped * ov;
	EventHandler * eh;
	ULONG_PTR intfd;
	int ret;
	unsigned long bytes_recv;

	while(GetQueuedCompletionStatus(m_completionPort, &len, &intfd, &overlap, 1000))
	{
		// 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:
			{
				if(ov->m_params)
				{
					// if we had params, it means we are a udp socket with a udp_overlap pointer in this long.
					udp_overlap * uv = (udp_overlap*)ov->m_params;
					uv->udp_len = len;
					this->udp_ov = uv;
					eh->m_readEvent = 0;
					eh->HandleEvent(EVENT_READ, 0);
					this->udp_ov = 0;
					delete uv;
					PostReadEvent(eh);
				}
				else
				{
					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); /* Old macdonald had an error, EIEIO. */
					}
					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;
}

int __recvfrom(SOCKET s, char * buf, int len, int flags, struct sockaddr * from, int * fromlen, udp_overlap * ov)
{
	memcpy(buf, ov->udp_buffer, ov->udp_len);
	memcpy(from, ov->udp_sockaddr, *fromlen);
	return ov->udp_len;
}

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];
}

\ No newline at end of file
+/*       +------------------------------------+
+ *       | 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>
+
+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(eh->GetFd());
+	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;
+
+	unsigned long completion_key = (ULONG_PTR)eh->m_internalFd;
+	/* assign the socket to the completion port */
+	if(!CreateIoCompletionPort((HANDLE)eh->GetFd(), m_completionPort, completion_key, 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 =) */
+	try
+	{
+		m_binding.insert( map<int, EventHandler*>::value_type( eh->GetFd(), eh ) );
+	}
+	catch (...)
+	{
+		/* Ohshi-, map::insert failed :/ */
+		return false;
+	}
+
+	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. */
+	if (CancelIo((HANDLE)fd) == FALSE)
+		return false;
+
+	/* Free the buffer, and delete the event. */
+	if(eh->m_readEvent != 0)
+	{
+		if(((Overlapped*)eh->m_readEvent)->m_params != 0)
+			delete ((udp_overlap*)((Overlapped*)eh->m_readEvent)->m_params);
+
+		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)
+	{
+		ULONG_PTR completion_key = (ULONG_PTR)eh->m_internalFd;
+		Overlapped * ov = new Overlapped(SOCKET_IO_EVENT_WRITE_READY, 0);
+		eh->m_writeEvent = (void*)ov;
+		PostQueuedCompletionStatus(m_completionPort, 0, completion_key, &ov->m_overlap);
+	}
+}
+
+bool IOCPEngine::PostCompletionEvent(EventHandler * eh, SocketIOEvent type, int param)
+{
+	Overlapped * ov = new Overlapped(type, param);
+	ULONG_PTR completion_key = (ULONG_PTR)eh->m_internalFd;
+	return PostQueuedCompletionStatus(m_completionPort, 0, completion_key, &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 */
+		{
+			udp_overlap * uv = new udp_overlap;
+			uv->udp_sockaddr_len = sizeof(sockaddr);
+			buf.buf = (char*)uv->udp_buffer;
+			buf.len = sizeof(uv->udp_buffer);
+			ov->m_params = (unsigned long)uv;
+			if(WSARecvFrom(eh->GetFd(), &buf, 1, &uv->udp_len, &flags, uv->udp_sockaddr, (LPINT)&uv->udp_sockaddr_len, &ov->m_overlap, 0))
+			{
+				int err = WSAGetLastError();
+				if(err != 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);
+			return;
+		}
+		break;
+	}
+	eh->m_readEvent = (void*)ov;
+}
+
+int IOCPEngine::DispatchEvents()
+{
+	DWORD len;
+	LPOVERLAPPED overlap;
+	Overlapped * ov;
+	EventHandler * eh;
+	ULONG_PTR intfd;
+	int ret;
+	unsigned long bytes_recv;
+
+	while(GetQueuedCompletionStatus(m_completionPort, &len, &intfd, &overlap, 1000))
+	{
+		// 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:
+			{
+				if(ov->m_params)
+				{
+					// if we had params, it means we are a udp socket with a udp_overlap pointer in this long.
+					udp_overlap * uv = (udp_overlap*)ov->m_params;
+					uv->udp_len = len;
+					this->udp_ov = uv;
+					eh->m_readEvent = 0;
+					eh->HandleEvent(EVENT_READ, 0);
+					this->udp_ov = 0;
+					delete uv;
+					PostReadEvent(eh);
+				}
+				else
+				{
+					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); /* Old macdonald had an error, EIEIO. */
+					}
+					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;
+}
+
+int __recvfrom(SOCKET s, char * buf, int len, int flags, struct sockaddr * from, int * fromlen, udp_overlap * ov)
+{
+	memcpy(buf, ov->udp_buffer, ov->udp_len);
+	memcpy(from, ov->udp_sockaddr, *fromlen);
+	return ov->udp_len;
+}
+
+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];
+}
+