1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
7 * <brain@chatspike.net>
8 * <Craig@chatspike.net>
10 * Written by Craig Edwards, Craig McLure, and others.
11 * This program is free but copyrighted software; see
12 * the file COPYING for details.
14 * ---------------------------------------------------
17 #ifndef __INSP_SOCKET_H__
18 #define __INSP_SOCKET_H__
20 #include <sys/types.h>
21 #include <sys/socket.h>
22 #include <netinet/in.h>
27 * States which a socket may be in
29 enum InspSocketState { I_DISCONNECTED, I_RESOLVING, I_CONNECTING, I_CONNECTED, I_LISTENING, I_ERROR };
32 * Error types which a socket may exhibit
34 enum InspSocketError { I_ERR_TIMEOUT, I_ERR_SOCKET, I_ERR_CONNECT, I_ERR_BIND, I_ERR_RESOLVE };
37 * InspSocket is an extendable socket class which modules
38 * can use for TCP socket support. It is fully integrated
39 * into InspIRCds socket loop and attaches its sockets to
40 * the core's instance of the SocketEngine class, meaning
41 * that any sockets you create have the same power and
42 * abilities as a socket created by the core itself.
43 * To use InspSocket, you must inherit a class from it,
44 * and use the InspSocket constructors to establish connections
52 * The file descriptor of this socket
57 * The resolver for this socket
62 * The hostname connected to
67 * The port connected to, or the port
68 * this socket is listening on
73 * The state for this socket, either
74 * listening, connecting, connected
77 InspSocketState state;
80 * The host being connected to,
86 * The host being connected to,
92 * When this time is reached,
93 * the socket times out if it is
94 * in the CONNECTING state
99 * This value is true if the
100 * socket has timed out.
105 * Socket input buffer, used by read(). The class which
106 * extends InspSocket is expected to implement an extendable
107 * buffer which can grow much larger than 64k,
108 * this buffer is just designed to be temporary storage.
114 * The output buffer for this socket
119 * The IP address being connected
120 * to stored in string form for
121 * easy retrieval by accessors.
126 * Client sockaddr structure used
132 * Server sockaddr structure used
138 * Used by accept() to indicate the
139 * sizes of the sockaddr_in structures
143 /** Flushes the write buffer
145 void FlushWriteBuffer();
150 * The default constructor does nothing
151 * and should not be used.
156 * This constructor is used to associate
157 * an existing connecting with an InspSocket
158 * class. The given file descriptor must be
159 * valid, and when initialized, the InspSocket
160 * will be set with the given IP address
161 * and placed in CONNECTED state.
163 InspSocket(int newfd, char* ip);
166 * This constructor is used to create a new
167 * socket, either listening for connections,
168 * or an outbound connection to another host.
169 * @param host The hostname to connect to, or bind to
170 * @param port The port number to connect to, or bind to
171 * @param listening true to listen on the given host:port pair, or false to connect to them
172 * @param maxtime Number of seconds to wait, if connecting, before the connection times out and an OnTimeout() event is generated
174 InspSocket(std::string host, int port, bool listening, unsigned long maxtime);
177 * This method is called when an outbound
178 * connection on your socket is completed.
179 * @return false to abort the connection, true to continue
181 virtual bool OnConnected();
184 * This method is called when an error occurs.
185 * A closed socket in itself is not an error,
186 * however errors also generate close events.
187 * @param e The error type which occured
189 virtual void OnError(InspSocketError e);
192 * When an established connection is terminated,
193 * the OnDisconnect method is triggered.
195 virtual int OnDisconnect();
198 * When there is data waiting to be read on a
199 * socket, the OnDataReady() method is called.
200 * Within this method, you *MUST* call the Read()
201 * method to read any pending data. At its lowest
202 * level, this event is signalled by the core via
203 * the socket engine. If you return false from this
204 * function, the core removes your socket from its
205 * list and erases it from the socket engine, then
206 * calls InspSocket::Close() and deletes it.
207 * @return false to close the socket
209 virtual bool OnDataReady();
212 * When an outbound connection fails, and the
213 * attempt times out, you will receive this event.
214 * The mthod will trigger once maxtime secons are
215 * reached (as given in the constructor) just
216 * before the socket's descriptor is closed.
218 virtual void OnTimeout();
221 * Whenever close() is called, OnClose() will be
222 * called first. Please note that this means
223 * OnClose will be called alongside OnError(),
224 * OnTimeout(), and Close(), and also when
225 * cancelling a listening socket by calling
226 * the destructor indirectly.
228 virtual void OnClose();
231 * Reads all pending bytes from the socket
232 * into a char* array which can be up to
233 * 16 kilobytes in length.
235 virtual char* Read();
238 * Returns the IP address associated with
239 * this connection, or an empty string if
240 * no IP address exists.
245 * This function checks if the socket has
246 * timed out yet, given the current time
248 * @return true if timed out, false if not timed out
250 bool Timeout(time_t current);
253 * Writes a std::string to the socket. No carriage
254 * returns or linefeeds are appended to the string.
255 * @param data The data to send
257 virtual int Write(std::string data);
260 * If your socket is a listening socket, when a new
261 * connection comes in on the socket this method will
262 * be called. Given the new file descriptor in the
263 * parameters, and the IP, it is recommended you copy
264 * them to a new instance of your socket class,
267 * MySocket* newsocket = new MySocket(newfd,ip);
269 * Once you have done this, you can then associate the
270 * new socket with the core using Server::AddSocket().
272 virtual int OnIncomingConnection(int newfd, char* ip);
275 * Changes the socket's state. The core uses this
276 * to change socket states, and you should not call
279 void SetState(InspSocketState s);
282 * Returns the current socket state.
284 InspSocketState GetState();
287 * Only the core should call this function.
288 * When called, it is assumed the socket is ready
289 * to read data, and the method call routes the
290 * event to the various methods of InspSocket
291 * for you to handle. This can also cause the
292 * socket's state to change.
297 * This method returns the socket's file descriptor
298 * as assigned by the operating system, or -1
299 * if no descriptor has been assigned.
304 * This method causes the socket to close, and may
305 * also be triggered by other methods such as OnTimeout
308 virtual void Close();
311 * The destructor may implicitly call OnClose(), and
312 * will close() and shutdown() the file descriptor
313 * used for this socket.
315 virtual ~InspSocket();