Split inspircd_io.* insp inspsocket.* and configreader.* with a few odd bits going into inspircd.*, doesn't look like I've broken anything... :P

git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@3847 e03df62e-2008-0410-955e-edbf42e46eb7

1 files changed, 374 insertions, 0 deletions

diff --git a/include/inspsocket.h b/include/inspsocket.h
new file mode 100644
index 000000000..caa1490b5
--- /dev/null
+++ b/include/inspsocket.h
@@ -0,0 +1,374 @@
+/*       +------------------------------------+
+ *       | Inspire Internet Relay Chat Daemon |
+ *       +------------------------------------+
+ *
+ *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
+ *                       E-mail:
+ *                <brain@chatspike.net>
+ *           	  <Craig@chatspike.net>
+ *     
+ * Written by Craig Edwards, Craig McLure, and others.
+ * This program is free but copyrighted software; see
+ *            the file COPYING for details.
+ *
+ * ---------------------------------------------------
+ */
+
+#ifndef __INSP_SOCKET_H__
+#define __INSP_SOCKET_H__
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <sstream>
+#include <string>
+#include <deque>
+#include "dns.h"
+#include "inspircd_config.h"
+
+/* macros to the relevant system address description structs */
+#ifdef IPV6
+
+typedef struct sockaddr_in6 insp_sockaddr;
+typedef struct in6_addr     insp_inaddr;
+
+#else
+
+typedef struct sockaddr_in  insp_sockaddr;
+typedef struct in_addr      insp_inaddr;
+
+#endif
+
+/**
+ * States which a socket may be in
+ */
+enum InspSocketState { I_DISCONNECTED, I_RESOLVING, I_CONNECTING, I_CONNECTED, I_LISTENING, I_ERROR };
+
+/**
+ * Error types which a socket may exhibit
+ */
+enum InspSocketError { I_ERR_TIMEOUT, I_ERR_SOCKET, I_ERR_CONNECT, I_ERR_BIND, I_ERR_RESOLVE, I_ERR_WRITE };
+
+/**
+ * InspSocket is an extendable socket class which modules
+ * can use for TCP socket support. It is fully integrated
+ * into InspIRCds socket loop and attaches its sockets to
+ * the core's instance of the SocketEngine class, meaning
+ * that any sockets you create have the same power and
+ * abilities as a socket created by the core itself.
+ * To use InspSocket, you must inherit a class from it,
+ * and use the InspSocket constructors to establish connections
+ * and bindings.
+ */
+class InspSocket
+{
+private:
+
+	std::deque<std::string> outbuffer;
+
+	/**
+	 * The file descriptor of this socket
+	 */
+        int fd;
+
+	/**
+	 * The resolver for this socket
+	 */
+	DNS dns;
+
+	/**
+	 * The hostname connected to
+	 */
+	char host[MAXBUF];
+
+	/**
+	 * The port connected to, or the port
+	 * this socket is listening on
+	 */
+	int port;
+
+	/**
+	 * The state for this socket, either
+	 * listening, connecting, connected
+	 * or error.
+	 */
+	InspSocketState state;
+
+	/**
+	 * The host being connected to,
+	 * in sockaddr form
+	 */
+        insp_sockaddr addr;
+
+	/** 
+	 * The host being connected to,
+	 * in in_addr form
+	 */
+        insp_inaddr addy;
+
+	/**
+	 * When this time is reached,
+	 * the socket times out if it is
+	 * in the CONNECTING state
+	 */
+        time_t timeout_end;
+
+	/**
+	 * This value is true if the
+	 * socket has timed out.
+	 */
+        bool timeout;
+	
+	/**
+	 * Socket input buffer, used by read(). The class which
+	 * extends InspSocket is expected to implement an extendable
+	 * buffer which can grow much larger than 64k,
+	 * this buffer is just designed to be temporary storage.
+	 * space.
+	 */
+	char ibuf[65535];
+
+	/**
+	 * The IP address being connected
+	 * to stored in string form for
+	 * easy retrieval by accessors.
+	 */
+	char IP[MAXBUF];
+
+	/**
+	 * Client sockaddr structure used
+	 * by accept()
+	 */
+	insp_sockaddr client;
+
+	/**
+	 * Server sockaddr structure used
+	 * by accept()
+	 */
+	insp_sockaddr server;
+
+	/**
+	 * Used by accept() to indicate the
+	 * sizes of the sockaddr_in structures
+	 */
+	socklen_t length;
+
+	/** Flushes the write buffer
+	 */
+	bool FlushWriteBuffer();
+
+	/** Set the queue sizes
+	 * This private method sets the operating system queue
+	 * sizes for this socket to 65535 so that it can queue
+	 * more information without application-level queueing
+	 * which was required in older software.
+	 */
+	void SetQueues(int nfd);
+
+	/** When the socket has been marked as closing, this flag
+	 * will be set to true, then the next time the socket is
+	 * examined, the socket is deleted and closed.
+	 */
+	bool ClosePending;
+
+public:
+
+	/**
+	 * The default constructor does nothing
+	 * and should not be used.
+	 */
+	InspSocket();
+
+	/**
+	 * This constructor is used to associate
+	 * an existing connecting with an InspSocket
+	 * class. The given file descriptor must be
+	 * valid, and when initialized, the InspSocket
+	 * will be set with the given IP address
+	 * and placed in CONNECTED state.
+	 */
+	InspSocket(int newfd, char* ip);
+
+	/**
+	 * This constructor is used to create a new
+	 * socket, either listening for connections, or an outbound connection to another host.
+	 * Note that if you specify a hostname in the 'host' parameter, then there will be an extra
+	 * step involved (a nonblocking DNS lookup) which will cause your connection to be established
+	 * slower than if it was an IP. Therefore, use an IP address where it is available instead.
+	 * @param host The hostname to connect to, or bind to
+	 * @param port The port number to connect to, or bind to
+	 * @param listening true to listen on the given host:port pair, or false to connect to them
+	 * @param maxtime Number of seconds to wait, if connecting, before the connection times out and an OnTimeout() event is generated
+	 */
+	InspSocket(const std::string &host, int port, bool listening, unsigned long maxtime);
+
+	/**
+	 * This method is called when an outbound
+	 * connection on your socket is completed.
+	 * @return false to abort the connection, true to continue
+	 */
+	virtual bool OnConnected();
+
+	/**
+	 * This method is called when an error occurs.
+	 * A closed socket in itself is not an error,
+	 * however errors also generate close events.
+	 * @param e The error type which occured
+	 */
+	virtual void OnError(InspSocketError e);
+
+	/**
+	 * When an established connection is terminated,
+	 * the OnDisconnect method is triggered.
+	 */
+	virtual int OnDisconnect();
+
+	/**
+	 * When there is data waiting to be read on a
+	 * socket, the OnDataReady() method is called.
+	 * Within this method, you *MUST* call the Read()
+	 * method to read any pending data. At its lowest
+	 * level, this event is signalled by the core via
+	 * the socket engine. If you return false from this
+	 * function, the core removes your socket from its
+	 * list and erases it from the socket engine, then
+	 * calls InspSocket::Close() and deletes it.
+	 * @return false to close the socket
+	 */
+	virtual bool OnDataReady();
+
+	/**
+	 * When an outbound connection fails, and the
+	 * attempt times out, you will receive this event.
+	 * The method will trigger once maxtime seconds are
+	 * reached (as given in the constructor) just
+	 * before the socket's descriptor is closed.
+	 * A failed DNS lookup may cause this event if
+	 * the DNS server is not responding, as well as
+	 * a failed connect() call, because DNS lookups are
+	 * nonblocking as implemented by this class.
+	 */
+	virtual void OnTimeout();
+
+	/**
+	 * Whenever close() is called, OnClose() will be
+	 * called first. Please note that this means
+	 * OnClose will be called alongside OnError(),
+	 * OnTimeout(), and Close(), and also when
+	 * cancelling a listening socket by calling
+	 * the destructor indirectly.
+	 */
+	virtual void OnClose();
+
+	/**
+	 * Reads all pending bytes from the socket
+	 * into a char* array which can be up to
+	 * 16 kilobytes in length.
+	 */
+	virtual char* Read();
+
+	/**
+	 * Returns the IP address associated with
+	 * this connection, or an empty string if
+	 * no IP address exists.
+	 */
+	std::string GetIP();
+
+	/**
+	 * This function checks if the socket has
+	 * timed out yet, given the current time
+	 * in the parameter.
+	 * @return true if timed out, false if not timed out
+	 */
+	bool Timeout(time_t current);
+
+	/**
+	 * Writes a std::string to the socket. No carriage
+	 * returns or linefeeds are appended to the string.
+	 * @param data The data to send
+	 */
+	virtual int Write(const std::string &data);
+
+	/**
+	 * If your socket is a listening socket, when a new
+	 * connection comes in on the socket this method will
+	 * be called. Given the new file descriptor in the
+	 * parameters, and the IP, it is recommended you copy
+	 * them to a new instance of your socket class,
+	 * e.g.:
+	 *
+	 * MySocket* newsocket = new MySocket(newfd,ip);
+	 *
+	 * Once you have done this, you can then associate the
+	 * new socket with the core using Server::AddSocket().
+	 */
+	virtual int OnIncomingConnection(int newfd, char* ip);
+
+	/**
+	 * Changes the socket's state. The core uses this
+	 * to change socket states, and you should not call
+	 * it directly.
+	 */
+	void SetState(InspSocketState s);
+
+	/**
+	 * Returns the current socket state.
+	 */
+	InspSocketState GetState();
+
+	/**
+	 * Only the core should call this function.
+	 * When called, it is assumed the socket is ready
+	 * to read data, and the method call routes the
+	 * event to the various methods of InspSocket
+	 * for you to handle. This can also cause the
+	 * socket's state to change.
+	 */
+	bool Poll();
+
+	/**
+	 * This method returns the socket's file descriptor
+	 * as assigned by the operating system, or -1
+	 * if no descriptor has been assigned.
+	 */
+	int GetFd();
+
+	/**
+	 * This method causes the socket to close, and may
+	 * also be triggered by other methods such as OnTimeout
+	 * and OnError.
+	 */
+	virtual void Close();
+
+	/**
+	 * The destructor may implicitly call OnClose(), and
+	 * will close() and shutdown() the file descriptor
+	 * used for this socket.
+	 */
+	virtual ~InspSocket();
+
+	/**
+	 * This method attempts to resolve the hostname,
+	 * if a hostname is given and not an IP,
+	 * before a connection can occur. This method is
+	 * asyncronous.
+	 */
+	virtual bool DoResolve();
+
+	/**
+	 * This method attempts to connect to a hostname.
+	 * This only occurs on a non-listening socket. This
+	 * method is asyncronous.
+	 */
+	virtual bool DoConnect();
+
+	/**
+	 * This method marks the socket closed.
+	 * The next time the core examines a socket marked
+	 * as closed, the socket will be closed and the 
+	 * memory reclaimed.
+	 */
+	void MarkAsClosed();
+};
+
+#endif