-/* +------------------------------------+
- * | Inspire Internet Relay Chat Daemon |
- * +------------------------------------+
+/*
+ * InspIRCd -- Internet Relay Chat Daemon
*
- * InspIRCd: (C) 2002-2009 InspIRCd Development Team
- * See: http://wiki.inspircd.org/Credits
+ * Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
+ * Copyright (C) 2007-2008 Robin Burchell <robin+git@viroteck.net>
+ * Copyright (C) 2005-2007 Craig Edwards <craigedwards@brainbox.cc>
+ * Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
*
- * This program is free but copyrighted software; see
- * the file COPYING for details.
+ * This file is part of InspIRCd. InspIRCd is free software: you can
+ * redistribute it and/or modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation, version 2.
*
- * ---------------------------------------------------
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
-#ifndef __SOCKETENGINE__
-#define __SOCKETENGINE__
+
+#ifndef SOCKETENGINE_H
+#define SOCKETENGINE_H
#include <vector>
#include <string>
#include <map>
#include "inspircd_config.h"
+#include "socket.h"
#include "base.h"
/** Types of event an EventHandler may receive.
* it may not require a system call to transition from FD_WANT_FAST_READ
*/
FD_WANT_EDGE_READ = 0x8,
-
+
/** Mask for all read events */
FD_WANT_READ_MASK = 0x0F,
FD_WANT_NO_WRITE = 0x10,
/** Give a write event at all times when writes will not block.
*
- * You probably don't need to use this state; try your write first, and
- * then use FD_WANT_FAST_WRITE.
+ * You probably shouldn't use this state; if it's likely that the write
+ * will not block, try it first, then use FD_WANT_FAST_WRITE if it
+ * fails. If it's likely to block (or you are using polling-style reads)
+ * then use FD_WANT_SINGLE_WRITE.
*/
FD_WANT_POLL_WRITE = 0x20,
/** Give a write event when writes don't block any more
* FD_WANT_FAST_WRITE when writing data to a mostly-unblocked socket.
*/
FD_WANT_EDGE_WRITE = 0x80,
+ /** Request a one-shot poll-style write notification. The socket will
+ * return to the FD_WANT_NO_WRITE state before HandleEvent is called.
+ */
+ FD_WANT_SINGLE_WRITE = 0x100,
/** Mask for all write events */
- FD_WANT_WRITE_MASK = 0xF0,
+ FD_WANT_WRITE_MASK = 0x1F0,
/** Add a trial read. During the next DispatchEvents invocation, this
* will call HandleEvent with EVENT_READ unless reads are known to be
- * blocking. Useful for edge-triggered reads; does nothing if
- * FD_READ_WILL_BLOCK has been set on this EventHandler.
+ * blocking.
*/
- FD_ADD_TRIAL_READ = 0x100,
+ FD_ADD_TRIAL_READ = 0x1000,
/** Assert that reads are known to block. This cancels FD_ADD_TRIAL_READ.
+ * Reset by SE before running EVENT_READ
*/
- FD_READ_WILL_BLOCK = 0x200,
+ FD_READ_WILL_BLOCK = 0x2000,
/** Add a trial write. During the next DispatchEvents invocation, this
* will call HandleEvent with EVENT_WRITE unless writes are known to be
* send() syscall, or to ensure that writes are blocking when attempting
* to use FD_WANT_FAST_WRITE.
*/
- FD_ADD_TRIAL_WRITE = 0x1000,
+ FD_ADD_TRIAL_WRITE = 0x4000,
/** Assert that writes are known to block. This cancels FD_ADD_TRIAL_WRITE.
+ * Reset by SE before running EVENT_WRITE
*/
- FD_WRITE_WILL_BLOCK = 0x2000,
+ FD_WRITE_WILL_BLOCK = 0x8000,
- /** Mask for trial read/write items */
- FD_TRIAL_NOTE_MASK = 0x1100,
- /** Mask for read/write blocking notifications */
- FD_BLOCK_NOTE_MASK = 0x2200
+ /** Mask for trial read/trial write */
+ FD_TRIAL_NOTE_MASK = 0x5000
};
-class InspIRCd;
-class Module;
-
/** This class is a basic I/O handler class.
* Any object which wishes to receive basic I/O events
* from the socketengine must derive from this class and
* must have a file descriptor. What this file descriptor
* is actually attached to is completely up to you.
*/
-class CoreExport EventHandler : public Extensible
+class CoreExport EventHandler : public classbase
{
private:
/** Private state maintained by socket engine */
* class, and it will be called whenever read or write
* events are received.
* @param et either one of EVENT_READ for read events,
- * and EVENT_WRITE for write events.
+ * EVENT_WRITE for write events and EVENT_ERROR for
+ * error events.
+ * @param errornum The error code which goes with an EVENT_ERROR.
*/
virtual void HandleEvent(EventType et, int errornum = 0) = 0;
void SetEventMask(EventHandler* eh, int value);
public:
- double TotalEvents;
- double ReadEvents;
- double WriteEvents;
- double ErrorEvents;
+ unsigned long TotalEvents;
+ unsigned long ReadEvents;
+ unsigned long WriteEvents;
+ unsigned long ErrorEvents;
/** Constructor.
* The constructor transparently initializes
* and false if it failed. This does not free the
* EventHandler pointer using delete, if this is
* required you must do this yourself.
- * Note on forcing deletes. DO NOT DO THIS! This is
- * extremely dangerous and will most likely render the
- * socketengine dead. This was added only for handling
- * very rare cases where broken 3rd party libs destroys
- * the OS socket beyond our control. If you can't explain
- * in minute details why forcing is absolutely necessary
- * then you don't need it. That was a NO!
* @param eh The event handler object to remove
- * @param force *DANGEROUS* See method description!
- * @return True if the event handler was removed
*/
- virtual bool DelFd(EventHandler* eh, bool force = false) = 0;
+ virtual void DelFd(EventHandler* eh) = 0;
/** Returns true if a file descriptor exists in
* the socket engine's list.
/** Abstraction for BSD sockets accept(2).
* This function should emulate its namesake system call exactly.
* @param fd This version of the call takes an EventHandler instead of a bare file descriptor.
+ * @param addr The client IP address and port
+ * @param addrlen The size of the sockaddr parameter.
* @return This method should return exactly the same values as the system call it emulates.
*/
- virtual int Accept(EventHandler* fd, sockaddr *addr, socklen_t *addrlen);
+ int Accept(EventHandler* fd, sockaddr *addr, socklen_t *addrlen);
/** Abstraction for BSD sockets close(2).
* This function should emulate its namesake system call exactly.
* @param fd This version of the call takes an EventHandler instead of a bare file descriptor.
* @return This method should return exactly the same values as the system call it emulates.
*/
- virtual int Close(EventHandler* fd);
+ int Close(EventHandler* fd);
/** Abstraction for BSD sockets close(2).
* This function should emulate its namesake system call exactly.
* This function should emulate its namesake system call exactly.
* @return This method should return exactly the same values as the system call it emulates.
*/
- virtual int Close(int fd);
+ int Close(int fd);
/** Abstraction for BSD sockets send(2).
* This function should emulate its namesake system call exactly.
* @param fd This version of the call takes an EventHandler instead of a bare file descriptor.
+ * @param buf The buffer in which the data that is sent is stored.
+ * @param len The size of the buffer.
+ * @param flags A flag value that controls the sending of the data.
* @return This method should return exactly the same values as the system call it emulates.
*/
- virtual int Send(EventHandler* fd, const void *buf, size_t len, int flags);
+ int Send(EventHandler* fd, const void *buf, size_t len, int flags);
/** Abstraction for BSD sockets recv(2).
* This function should emulate its namesake system call exactly.
* @param fd This version of the call takes an EventHandler instead of a bare file descriptor.
+ * @param buf The buffer in which the data that is read is stored.
+ * @param len The size of the buffer.
+ * @param flags A flag value that controls the reception of the data.
* @return This method should return exactly the same values as the system call it emulates.
*/
- virtual int Recv(EventHandler* fd, void *buf, size_t len, int flags);
+ int Recv(EventHandler* fd, void *buf, size_t len, int flags);
/** Abstraction for BSD sockets recvfrom(2).
* This function should emulate its namesake system call exactly.
* @param fd This version of the call takes an EventHandler instead of a bare file descriptor.
+ * @param buf The buffer in which the data that is read is stored.
+ * @param len The size of the buffer.
+ * @param flags A flag value that controls the reception of the data.
+ * @param from The remote IP address and port.
+ * @param fromlen The size of the from parameter.
* @return This method should return exactly the same values as the system call it emulates.
*/
- virtual int RecvFrom(EventHandler* fd, void *buf, size_t len, int flags, sockaddr *from, socklen_t *fromlen);
+ int RecvFrom(EventHandler* fd, void *buf, size_t len, int flags, sockaddr *from, socklen_t *fromlen);
/** Abstraction for BSD sockets sendto(2).
* This function should emulate its namesake system call exactly.
* @param fd This version of the call takes an EventHandler instead of a bare file descriptor.
+ * @param buf The buffer in which the data that is sent is stored.
+ * @param len The size of the buffer.
+ * @param flags A flag value that controls the sending of the data.
+ * @param to The remote IP address and port.
+ * @param tolen The size of the to parameter.
* @return This method should return exactly the same values as the system call it emulates.
*/
- virtual int SendTo(EventHandler* fd, const void *buf, size_t len, int flags, const sockaddr *to, socklen_t tolen);
+ int SendTo(EventHandler* fd, const void *buf, size_t len, int flags, const sockaddr *to, socklen_t tolen);
/** Abstraction for BSD sockets connect(2).
* This function should emulate its namesake system call exactly.
* @param fd This version of the call takes an EventHandler instead of a bare file descriptor.
+ * @param serv_addr The server IP address and port.
+ * @param addrlen The size of the sockaddr parameter.
* @return This method should return exactly the same values as the system call it emulates.
*/
- virtual int Connect(EventHandler* fd, const sockaddr *serv_addr, socklen_t addrlen);
+ int Connect(EventHandler* fd, const sockaddr *serv_addr, socklen_t addrlen);
/** Make a file descriptor blocking.
* @param fd a file descriptor to set to blocking mode
* @return 0 on success, -1 on failure, errno is set appropriately.
*/
- virtual int Blocking(int fd);
+ int Blocking(int fd);
/** Make a file descriptor nonblocking.
* @param fd A file descriptor to set to nonblocking mode
* @return 0 on success, -1 on failure, errno is set appropriately.
*/
- virtual int NonBlocking(int fd);
+ int NonBlocking(int fd);
/** Abstraction for BSD sockets shutdown(2).
* This function should emulate its namesake system call exactly.
* @param fd This version of the call takes an EventHandler instead of a bare file descriptor.
+ * @param how What part of the socket to shut down
* @return This method should return exactly the same values as the system call it emulates.
*/
- virtual int Shutdown(EventHandler* fd, int how);
+ int Shutdown(EventHandler* fd, int how);
/** Abstraction for BSD sockets shutdown(2).
* This function should emulate its namesake system call exactly.
* @return This method should return exactly the same values as the system call it emulates.
*/
- virtual int Shutdown(int fd, int how);
+ int Shutdown(int fd, int how);
/** Abstraction for BSD sockets bind(2).
* This function should emulate its namesake system call exactly.
* @return This method should return exactly the same values as the system call it emulates.
*/
- virtual int Bind(int fd, const sockaddr *my_addr, socklen_t addrlen);
+ int Bind(int fd, const irc::sockets::sockaddrs& addr);
/** Abstraction for BSD sockets listen(2).
* This function should emulate its namesake system call exactly.
* @return This method should return exactly the same values as the system call it emulates.
*/
- virtual int Listen(int sockfd, int backlog);
+ int Listen(int sockfd, int backlog);
- /** Abstraction for BSD sockets getsockname(2).
- * This function should emulate its namesake system call exactly.
- * @param fd This version of the call takes an EventHandler instead of a bare file descriptor.
- * @return This method should return exactly the same values as the system call it emulates.
+ /** Set SO_REUSEADDR and SO_LINGER on this file descriptor
*/
- virtual int GetSockName(EventHandler* fd, sockaddr *name, socklen_t* namelen);
+ void SetReuse(int sockfd);
/** This function is called immediately after fork().
* Some socket engines (notably kqueue) cannot have their
/** Get data transfer statistics, kilobits per second in and out and total.
*/
void GetStats(float &kbitpersec_in, float &kbitpersec_out, float &kbitpersec_total);
+
+ /** Should we ignore the error in errno?
+ * Checks EAGAIN and WSAEWOULDBLOCK
+ */
+ static bool IgnoreError();
+
+ /** Return the last socket related error. strrerror(errno) on *nix
+ */
+ static std::string LastError();
+
+ /** Returns the error for the given error num, strerror(errnum) on *nix
+ */
+ static std::string GetError(int errnum);
};
+inline bool SocketEngine::IgnoreError()
+{
+ if ((errno == EAGAIN) || (errno == EWOULDBLOCK))
+ return true;
+
+#ifdef _WIN32
+ if (WSAGetLastError() == WSAEWOULDBLOCK)
+ return true;
+#endif
+
+ return false;
+}
+
+SocketEngine* CreateSocketEngine();
+
#endif
projects / user / henk / code / inspircd.git / blobdiff