-/* +------------------------------------+
- * | Inspire Internet Relay Chat Daemon |
- * +------------------------------------+
+/*
+ * InspIRCd -- 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.
+ * Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
+ * Copyright (C) 2005-2007 Craig Edwards <craigedwards@brainbox.cc>
+ * Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
+ * Copyright (C) 2007 Robin Burchell <robin+git@viroteck.net>
+ * Copyright (C) 2006 Oliver Lupton <oliverlupton@gmail.com>
+ * Copyright (C) 2006 William Pitcock <nenolod@dereferenced.org>
*
- * ---------------------------------------------------
+ * 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 __INSP_SOCKET_H__
-#define __INSP_SOCKET_H__
+#ifndef INSPIRCD_SOCKET_H
+#define INSPIRCD_SOCKET_H
+
+#ifndef _WIN32
+
+#include <arpa/inet.h>
+#include <sys/time.h>
+#include <sys/resource.h>
#include <sys/types.h>
#include <sys/socket.h>
+#include <sys/stat.h>
#include <netinet/in.h>
-#include <sstream>
-#include <string>
-#include "dns.h"
-
-/**
- * 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 };
-
-/**
- * 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:
-
- /**
- * The file descriptor of this socket
- */
- int fd;
-
- /**
- * The resolver for this socket
- */
- DNS dns;
-
- /**
- * The hostname connected to
- */
- std::string host;
-
- /**
- * 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
- */
- sockaddr_in addr;
-
- /**
- * The host being connected to,
- * in in_addr form
- */
- in_addr 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 output buffer for this socket
- */
- std::string Buffer;
-
- /**
- * The IP address being connected
- * to stored in string form for
- * easy retrieval by accessors.
- */
- std::string IP;
-
- /**
- * Client sockaddr structure used
- * by accept()
- */
- sockaddr_in client;
-
- /**
- * Server sockaddr structure used
- * by accept()
- */
- sockaddr_in server;
-
- /**
- * Used by accept() to indicate the
- * sizes of the sockaddr_in structures
- */
- socklen_t length;
+#include <unistd.h>
+#include <fcntl.h>
+#include <netdb.h>
- /** Flushes the write buffer
- */
- void FlushWriteBuffer();
-
- void SetQueues(int nfd);
-
-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(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();
+#else
- /**
- * 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(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);
+#include "inspircd_win32wrapper.h"
- /**
- * Changes the socket's state. The core uses this
- * to change socket states, and you should not call
- * it directly.
- */
- void SetState(InspSocketState s);
+#endif
- /**
- * Returns the current socket state.
- */
- InspSocketState GetState();
+#include <cerrno>
- /**
- * 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.
+/* Contains irc-specific definitions */
+namespace irc
+{
+ /** This namespace contains various protocol-independent helper classes.
+ * It also contains some types which are often used by the core and modules
+ * in place of inet_* functions and types.
+ */
+ namespace sockets
+ {
+ union CoreExport sockaddrs
+ {
+ struct sockaddr sa;
+ struct sockaddr_in in4;
+ struct sockaddr_in6 in6;
+ /** Return the size of the structure for syscall passing */
+ int sa_size() const;
+ /** Return port number or -1 if invalid */
+ int port() const;
+ /** Return IP only */
+ std::string addr() const;
+ /** Return human-readable IP/port pair */
+ std::string str() const;
+ bool operator==(const sockaddrs& other) const;
+ inline bool operator!=(const sockaddrs& other) const { return !(*this == other); }
+ };
+
+ struct CoreExport cidr_mask
+ {
+ /** Type, AF_INET or AF_INET6 */
+ unsigned char type;
+ /** Length of the mask in bits (0-128) */
+ unsigned char length;
+ /** Raw bits. Unused bits must be zero */
+ unsigned char bits[16];
+
+ cidr_mask() {}
+ /** Construct a CIDR mask from the string. Will normalize (127.0.0.1/8 => 127.0.0.0/8). */
+ cidr_mask(const std::string& mask);
+ /** Construct a CIDR mask of a given length from the given address */
+ cidr_mask(const irc::sockets::sockaddrs& addr, int len);
+ /** Equality of bits, type, and length */
+ bool operator==(const cidr_mask& other) const;
+ /** Ordering defined for maps */
+ bool operator<(const cidr_mask& other) const;
+ /** Match within this CIDR? */
+ bool match(const irc::sockets::sockaddrs& addr) const;
+ /** Human-readable string */
+ std::string str() const;
+ };
+
+ /** Match CIDR, including an optional username/nickname part.
+ *
+ * This function will compare a human-readable address (plus
+ * optional username and nickname) against a human-readable
+ * CIDR mask, for example joe!bloggs\@1.2.3.4 against
+ * *!bloggs\@1.2.0.0/16. This method supports both IPV4 and
+ * IPV6 addresses.
+ * @param address The human readable address, e.g. fred\@1.2.3.4
+ * @param cidr_mask The human readable mask, e.g. *\@1.2.0.0/16
+ * @param match_with_username Does the mask include a nickname segment?
+ * @return True if the mask matches the address
+ */
+ CoreExport bool MatchCIDR(const std::string &address, const std::string &cidr_mask, bool match_with_username);
+
+ /** Return the size of the structure for syscall passing */
+ inline int sa_size(const irc::sockets::sockaddrs& sa) { return sa.sa_size(); }
+
+ /** Convert an address-port pair into a binary sockaddr
+ * @param addr The IP address, IPv4 or IPv6
+ * @param port The port, 0 for unspecified
+ * @param sa The structure to place the result in. Will be zeroed prior to conversion
+ * @return true if the conversion was successful, false if not.
+ */
+ CoreExport bool aptosa(const std::string& addr, int port, irc::sockets::sockaddrs& sa);
+
+ /** Convert a binary sockaddr to an address-port pair
+ * @param sa The structure to convert
+ * @param addr the IP address
+ * @param port the port
+ * @return true if the conversion was successful, false if unknown address family
+ */
+ CoreExport bool satoap(const irc::sockets::sockaddrs& sa, std::string& addr, int &port);
+
+ /** Convert a binary sockaddr to a user-readable string.
+ * This means IPv6 addresses are written as [::1]:6667, and *:6668 is used for 0.0.0.0:6668
+ * @param sa The structure to convert
+ * @return The string; "<unknown>" if not a valid address
+ */
+ inline std::string satouser(const irc::sockets::sockaddrs& sa) { return sa.str(); }
+ }
+}
+
+#include "socketengine.h"
+/** This class handles incoming connections on client ports.
+ * It will create a new User for every valid connection
+ * and assign it a file descriptor.
+ */
+class CoreExport ListenSocket : public EventHandler
+{
+ public:
+ reference<ConfigTag> bind_tag;
+ std::string bind_addr;
+ int bind_port;
+ /** Human-readable bind description */
+ std::string bind_desc;
+ /** Create a new listening socket
*/
- bool Poll();
-
- /**
- * This method returns the socket's file descriptor
- * as assigned by the operating system, or -1
- * if no descriptor has been assigned.
+ ListenSocket(ConfigTag* tag, const irc::sockets::sockaddrs& bind_to);
+ /** Handle an I/O event
*/
- int GetFd();
-
- /**
- * This method causes the socket to close, and may
- * also be triggered by other methods such as OnTimeout
- * and OnError.
+ void HandleEvent(EventType et, int errornum = 0);
+ /** Close the socket
*/
- virtual void Close();
+ ~ListenSocket();
- /**
- * The destructor may implicitly call OnClose(), and
- * will close() and shutdown() the file descriptor
- * used for this socket.
+ /** Handles sockets internals crap of a connection, convenience wrapper really
*/
- virtual ~InspSocket();
-
- virtual bool DoResolve();
- virtual bool DoConnect();
+ void AcceptInternal();
};
#endif
+
projects / user / henk / code / inspircd.git / blobdiff