Move socketengines into their own dir. This was all w00t's idea, but i told him no because i didnt think it would work. Now ive done it myself :P ner ner ne ner ner :)

git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@8332 e03df62e-2008-0410-955e-edbf42e46eb7

1 files changed, 515 insertions, 0 deletions

diff --git a/src/socketengines/socketengine_iocp.cpp b/src/socketengines/socketengine_iocp.cpp
new file mode 100644
index 000000000..84371ca3a
--- /dev/null
+++ b/src/socketengines/socketengine_iocp.cpp
@@ -0,0 +1,515 @@
+/*       +------------------------------------+
+ *       | 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 "socketengines/socketengine_iocp.h"
+#include "exitcodes.h"
+#include <mswsock.h>
+
+IOCPEngine::IOCPEngine(InspIRCd * Instance) : SocketEngine(Instance)
+{
+	/* Create completion port */
+	m_completionPort = CreateIoCompletionPort(INVALID_HANDLE_VALUE, NULL, (ULONG_PTR)0, 0);
+
+        if (!m_completionPort)
+	{
+		ServerInstance->Log(SPARSE,"ERROR: Could not initialize socket engine. Your kernel probably does not have the proper features.");
+		ServerInstance->Log(SPARSE,"ERROR: this is a fatal error, exiting now.");
+		printf("ERROR: Could not initialize socket engine. Your kernel probably does not have the proper features.");
+		printf("ERROR: this is a fatal error, exiting now.");
+		ServerInstance->Exit(EXIT_STATUS_SOCKETENGINE);
+	}
+
+	/* Null variables out. */
+	CurrentSetSize = 0;
+	EngineHandle = 0;
+	memset(ref, 0, sizeof(EventHandler*) * MAX_DESCRIPTORS);
+}
+
+IOCPEngine::~IOCPEngine()
+{
+	/* Clean up winsock and close completion port */
+	CloseHandle(m_completionPort);
+	WSACleanup();
+}
+
+bool IOCPEngine::AddFd(EventHandler* eh)
+{
+	/* Does it at least look valid? */
+	if (!eh)
+		return false;
+
+	int* fake_fd = new int(GenerateFd(eh->GetFd()));
+	int is_accept = 0;
+	int opt_len = sizeof(int);
+
+	/* In range? */
+	if ((*fake_fd < 0) || (*fake_fd > MAX_DESCRIPTORS))
+	{
+		delete fake_fd;
+		return false;
+	}
+
+	/* Already an entry here */
+	if (ref[*fake_fd])
+	{
+		delete fake_fd;
+		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->Extend("internal_fd", fake_fd);
+
+	unsigned long completion_key = (ULONG_PTR)*fake_fd;
+	/* assign the socket to the completion port */
+	if (!CreateIoCompletionPort((HANDLE)eh->GetFd(), m_completionPort, completion_key, 0))
+		return false;
+
+	/* 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;
+	}
+
+	++CurrentSetSize;
+	ref[*fake_fd] = eh;
+
+	return true;
+}
+
+bool IOCPEngine::DelFd(EventHandler* eh, bool force /* = false */)
+{
+	if (!eh)
+		return false;
+
+	int* fake_fd = NULL;
+
+	if (!eh->GetExt("internal_fd", fake_fd))
+		return false;
+
+	int fd = eh->GetFd();
+
+	void* m_readEvent = NULL;
+	void* m_writeEvent = NULL;
+	void* m_acceptEvent = NULL;
+
+	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->GetExt("windows_readevent", m_readEvent))
+	{
+		if(((Overlapped*)m_readEvent)->m_params != 0)
+			delete ((udp_overlap*)((Overlapped*)m_readEvent)->m_params);
+
+		delete ((Overlapped*)m_readEvent);
+		eh->Shrink("windows_readevent");
+	}
+
+	if(eh->GetExt("windows_writeevent", m_writeEvent))
+	{
+		delete ((Overlapped*)m_writeEvent);
+		eh->Shrink("windows_writeevent");
+	}
+
+	if(eh->GetExt("windows_acceptevent", m_acceptEvent))
+	{
+		delete ((accept_overlap*)((Overlapped*)m_acceptEvent)->m_params);
+		delete ((Overlapped*)m_acceptEvent);
+		eh->Shrink("windows_accepevent");
+	}
+
+	/* Clear binding */
+	ref[*fake_fd] = 0;
+	m_binding.erase(eh->GetFd());
+
+	delete fake_fd;
+	eh->Shrink("internal_fd");
+
+	/* decrement set size */
+	--CurrentSetSize;
+	
+	/* success */
+	return true;
+}
+
+void IOCPEngine::WantWrite(EventHandler* eh)
+{
+	if (!eh)
+		return;
+	
+	void* m_writeEvent = NULL;
+
+	int* fake_fd = NULL;
+	if (!eh->GetExt("internal_fd", fake_fd))
+		return;
+
+	/* Post event - write begin */
+	if(!eh->GetExt("windows_writeevent", m_writeEvent))
+	{
+		ULONG_PTR completion_key = (ULONG_PTR)*fake_fd;
+		Overlapped * ov = new Overlapped(SOCKET_IO_EVENT_WRITE_READY, 0);
+		eh->Shrink("windows_writeevent");
+		eh->Extend("windows_writeevent",ov);
+		PostQueuedCompletionStatus(m_completionPort, 0, completion_key, &ov->m_overlap);
+	}
+}
+
+bool IOCPEngine::PostCompletionEvent(EventHandler * eh, SocketIOEvent type, int param)
+{
+	if (!eh)
+		return false;
+
+	int* fake_fd = NULL;
+	if (!eh->GetExt("internal_fd", fake_fd))
+		return false;
+
+	Overlapped * ov = new Overlapped(type, param);
+	ULONG_PTR completion_key = (ULONG_PTR)*fake_fd;
+	return PostQueuedCompletionStatus(m_completionPort, 0, completion_key, &ov->m_overlap);
+}
+
+void IOCPEngine::PostReadEvent(EventHandler * eh)
+{
+	if (!eh)
+		return;
+
+	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->Extend("windows_readevent", 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))
+	{
+		if (intfd < 0 || intfd > MAX_DESCRIPTORS)
+			continue;
+
+		// woot, we got an event on a socket :P
+		eh = ref[intfd];
+		ov = CONTAINING_RECORD(overlap, Overlapped, m_overlap);
+
+		if (eh == 0)
+			continue;
+
+		void* m_readEvent = NULL;
+		void* m_writeEvent = NULL;
+
+		eh->GetExt("windows_readevent", m_readEvent);
+		eh->GetExt("windows_writeevent", m_writeEvent);
+
+		switch(ov->m_event)
+		{
+			case SOCKET_IO_EVENT_WRITE_READY:
+			{
+				eh->Shrink("windows_writeevent");
+				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->Shrink("windows_readevent");
+					eh->HandleEvent(EVENT_READ, 0);
+					this->udp_ov = 0;
+					delete uv;
+					PostReadEvent(eh);
+				}
+				else
+				{
+					ret = ioctlsocket(eh->GetFd(), FIONREAD, &bytes_recv);
+					eh->Shrink("windows_readevent");
+					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->Shrink("windows_acceptevent");
+				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)
+{
+	if (!eh)
+		return;
+
+	int on = 1;
+	u_long arg = 1;
+	struct linger linger = { 0 };
+
+	int fd = WSASocket(AF_INET, SOCK_STREAM, 0, 0, 0, WSA_FLAG_OVERLAPPED);
+
+	setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char*)&on, sizeof(on));
+	/* This is BSD compatible, setting l_onoff to 0 is *NOT* http://web.irc.org/mla/ircd-dev/msg02259.html */
+	linger.l_onoff = 1;
+	linger.l_linger = 1;
+	setsockopt(fd, SOL_SOCKET, SO_LINGER, (char*)&linger,sizeof(linger));
+	ioctlsocket(fd, FIONBIO, &arg);
+
+	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->Extend("windows_acceptevent", 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";
+}
+
+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);
+}
+
+bool IOCPEngine::BoundsCheckFd(EventHandler* eh)
+{
+	int * internal_fd;
+	if (!eh || eh->GetFd() < 0)
+		return false;
+
+	if(!eh->GetExt("internal_fd", internal_fd))
+		return false;
+
+	if(*internal_fd > MAX_DESCRIPTORS)
+		return false;
+
+	return true;
+}
+
+EventHandler * IOCPEngine::GetIntRef(int fd)
+{
+	if(fd < 0 || fd > MAX_DESCRIPTORS)
+		return 0;
+	return ref[fd];
+}
+
+int IOCPEngine::Accept(EventHandler* fd, sockaddr *addr, socklen_t *addrlen)
+{
+	SOCKET s = fd->GetFd();
+
+	Overlapped* acceptevent = NULL;
+	if (!fd->GetExt("windows_acceptevent", acceptevent))
+		/* Shit, no accept event on this socket! :( */
+		return -1;
+
+	Overlapped* ovl = 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 IOCPEngine::GetSockName(EventHandler* fd, sockaddr *name, socklen_t* namelen)
+{
+	Overlapped* ovl = NULL;
+	
+	if (!fd->GetExt("windows_acceptevent", ovl))
+		return -1;
+
+	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 IOCPEngine::RecvFrom(EventHandler* fd, void *buf, size_t len, int flags, struct sockaddr *from, socklen_t *fromlen)
+{
+	udp_overlap * ov = NULL;
+	if (!fd->GetExt("windows_readevent", ov))
+		return -1;
+        memcpy(buf, ov->udp_buffer, ov->udp_len);
+	memcpy(from, ov->udp_sockaddr, *fromlen);
+	return ov->udp_len;
+}
+
+int IOCPEngine::Blocking(int fd)
+{
+	unsigned long opt = 0;
+	return ioctlsocket(fd, FIONBIO, &opt);
+}
+
+int IOCPEngine::NonBlocking(int fd)
+{
+	unsigned long opt = 1;
+	return ioctlsocket(fd, FIONBIO, &opt);
+}
+
+int IOCPEngine::Close(int fd)
+{
+	return closesocket(fd);
+}
+
+int IOCPEngine::Close(EventHandler* fd)
+{
+	return this->Close(fd->GetFd());
+}
+