1 files changed, 242 insertions, 0 deletions
diff --git a/include/socketengines/socketengine_iocp.h b/include/socketengines/socketengine_iocp.h
new file mode 100644
index 000000000..b024828f1
--- /dev/null
+++ b/include/socketengines/socketengine_iocp.h
@@ -0,0 +1,242 @@
+/*       +------------------------------------+
+ *       | 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.
+ *
+ * ---------------------------------------------------
+ */
+
+#ifndef __SOCKETENGINE_IOCP__
+#define __SOCKETENGINE_IOCP__
+
+#define READ_BUFFER_SIZE 600
+#define USING_IOCP 1
+
+#include "inspircd_config.h"
+#include "inspircd_win32wrapper.h"
+#include "globals.h"
+#include "inspircd.h"
+#include "socketengine.h"
+
+/** Socket overlapped event types
+ */
+enum SocketIOEvent
+{
+	/** Read ready */
+	SOCKET_IO_EVENT_READ_READY			= 0,
+	/** Write ready */
+	SOCKET_IO_EVENT_WRITE_READY			= 1,
+	/** Accept ready */
+	SOCKET_IO_EVENT_ACCEPT				= 2,
+	/** Error occured */
+	SOCKET_IO_EVENT_ERROR				= 3,
+	/** Number of events */
+	NUM_SOCKET_IO_EVENTS				= 4,
+};
+
+/** Represents a windows overlapped IO event
+ */
+class Overlapped
+{
+ public:
+	/** Overlap event */
+	OVERLAPPED m_overlap;
+	/** Type of event */
+	SocketIOEvent m_event;
+#ifdef WIN64
+	/** Parameters */
+	unsigned __int64 m_params;
+#else
+	/** Parameters */
+	unsigned long m_params;
+#endif
+	/** Create an overlapped event
+	 */
+	Overlapped(SocketIOEvent ev, int params) : m_event(ev), m_params(params)
+	{
+		memset(&m_overlap, 0, sizeof(OVERLAPPED));
+	}
+};
+
+/** Specific to UDP sockets with overlapped IO
+ */
+struct udp_overlap
+{
+	unsigned char udp_buffer[600];
+	unsigned long udp_len;
+	sockaddr udp_sockaddr[2];
+	unsigned long udp_sockaddr_len;
+};
+
+/** Specific to accepting sockets with overlapped IO
+ */
+struct accept_overlap
+{
+	int socket;
+	char buf[1024];
+};
+
+/** Implementation of SocketEngine that implements windows IO Completion Ports
+ */
+class IOCPEngine : public SocketEngine
+{
+	/** Creates a "fake" file descriptor for use with an IOCP socket.
+	 * This is a little slow, but it isnt called too much. We'll fix it
+	 * in a future release.
+	 * @return -1 if there are no free slots, and an integer if it finds one.
+	 */
+	__inline int GenerateFd(int RealFd)
+	{
+		int index_hash = RealFd % MAX_DESCRIPTORS;
+		if(ref[index_hash] == 0)
+			return index_hash;
+		else
+		{
+			register int i = 0;
+			for(; i < MAX_DESCRIPTORS; ++i)
+				if(ref[i] == 0)
+					return i;
+		}
+		return -1;
+	}
+	
+	/** Global I/O completion port that sockets attach to.
+	 */
+	HANDLE m_completionPort;
+
+	/** This is kinda shitty... :/ for getting an address from a real fd. 
+	 */
+	map<int, EventHandler*> m_binding;
+
+public:
+	/** Holds the preallocated buffer passed to WSARecvFrom
+	 * function. Yes, I know, it's a dirty hack.
+	 */
+	udp_overlap * udp_ov;
+
+	/** Creates an IOCP Socket Engine
+	 * @param Instance The creator of this object
+	 */
+	IOCPEngine(InspIRCd* Instance);
+
+	/** Deletes an IOCP socket engine and all the attached sockets
+	 */
+	~IOCPEngine();
+
+	/** Adds an event handler to the completion port, and sets up initial events.
+	 * @param eh EventHandler to add
+	 * @return True if success, false if no room
+	 */
+	bool AddFd(EventHandler* eh);
+
+	/** Gets the maximum number of file descriptors that this engine can handle.
+	 * @return The number of file descriptors
+	 */
+	__inline int GetMaxFds() { return MAX_DESCRIPTORS; }
+
+	/** Gets the number of free/remaining file descriptors under this engine.
+	 * @return Remaining count
+	 */
+	__inline int GetRemainingFds()
+	{
+		register int count = 0;
+		register int i = 0;			
+		for(; i < MAX_DESCRIPTORS; ++i)
+			if(ref[i] == 0)
+				++count;
+		return count;
+	}
+
+	/** Removes a file descriptor from the set, preventing it from receiving any more events
+	 * @return True if remove was successful, false otherwise
+	 */
+	bool DelFd(EventHandler* eh, bool force = false);
+
+	/** Called every loop to handle input/output events for all sockets under this engine
+	 * @return The number of "changed" sockets.
+	 */
+	int DispatchEvents();
+
+	/** Gets the name of this socket engine as a string.
+	 * @return string of socket engine name
+	 */
+	std::string GetName();
+
+	/** Queues a Write event on the specified event handler.
+	 * @param eh EventHandler that needs data sent on
+	 */
+	void WantWrite(EventHandler* eh);
+
+	/** Posts a completion event on the specified socket.
+	 * @param eh EventHandler for message
+	 * @param type Event Type
+	 * @param param Event Parameter
+	 * @return True if added, false if not
+	 */
+	bool PostCompletionEvent(EventHandler* eh, SocketIOEvent type, int param);
+
+	/** Posts a read event on the specified socket
+	 * @param eh EventHandler (socket)
+	 */
+	void PostReadEvent(EventHandler* eh);
+
+	/** Posts an accept event on the specified socket
+	 * @param eh EventHandler (socket)
+	 */
+	void PostAcceptEvent(EventHandler* eh);
+
+	/** Returns the EventHandler attached to a specific fd.
+	 * If the fd isnt in the socketengine, returns NULL.
+	 * @param fd The event handler to look for
+	 * @return A pointer to the event handler, or NULL
+	 */
+	EventHandler* GetRef(int fd);
+
+	/** Returns true if a file descriptor exists in
+	 * the socket engine's list.
+	 * @param fd The event handler to look for
+	 * @return True if this fd has an event handler
+	 */
+	bool HasFd(int fd);
+
+	/** Returns the EventHandler attached to a specific fd.
+	 * If the fd isnt in the socketengine, returns NULL.
+	 * @param fd The event handler to look for
+	 * @return A pointer to the event handler, or NULL
+	 */
+	EventHandler* GetIntRef(int fd);
+
+	bool BoundsCheckFd(EventHandler* eh);
+
+	virtual int Accept(EventHandler* fd, sockaddr *addr, socklen_t *addrlen);
+
+	virtual int RecvFrom(EventHandler* fd, void *buf, size_t len, int flags, struct sockaddr *from, socklen_t *fromlen);
+
+	virtual int Blocking(int fd);
+
+	virtual int NonBlocking(int fd);
+
+	virtual int GetSockName(EventHandler* fd, sockaddr *name, socklen_t* namelen);
+
+	virtual int Close(int fd);
+
+	virtual int Close(EventHandler* fd);
+};
+
+/** Creates a SocketEngine
+ */
+class SocketEngineFactory
+{
+public:
+	/** Create a new instance of SocketEngine based on IOCPEngine
+	 */
+	SocketEngine* Create(InspIRCd* Instance) { return new IOCPEngine(Instance); }
+};
+
+#endif
+