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];
+}