1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd: (C) 2002-2008 InspIRCd Development Team
6 * See: http://www.inspircd.org/wiki/index.php/Credits
8 * This program is free but copyrighted software; see
9 * the file COPYING for details.
11 * ---------------------------------------------------
14 #ifndef __INSPIRCD_H__
15 #define __INSPIRCD_H__
20 #define printf_c printf
22 #include "inspircd_win32wrapper.h"
23 /** Windows defines these already */
28 // Required system headers.
32 #include "inspircd_config.h"
40 #include "usermanager.h"
43 #include "command_parse.h"
45 #include "socketengine.h"
47 #include "cull_list.h"
48 #include "filelogger.h"
51 #include "configreader.h"
52 #include "inspstring.h"
55 * Used to define the maximum number of parameters a command may have.
57 #define MAXPARAMETERS 127
59 /** Returned by some functions to indicate failure.
63 /** Support for librodent -
64 * see http://www.chatspike.net/index.php?z=64
66 #define ETIREDHAMSTERS EAGAIN
68 /** Template function to convert any input type to std::string
70 template<typename T> inline std::string ConvNumeric(const T &in)
72 if (in == 0) return "0";
77 *out = "0123456789"[ std::abs( (long)quotient % 10 ) ];
84 std::reverse(res,out);
88 /** Template function to convert any input type to std::string
90 inline std::string ConvToStr(const int in)
92 return ConvNumeric(in);
95 /** Template function to convert any input type to std::string
97 inline std::string ConvToStr(const long in)
99 return ConvNumeric(in);
102 /** Template function to convert any input type to std::string
104 inline std::string ConvToStr(const char* in)
109 /** Template function to convert any input type to std::string
111 inline std::string ConvToStr(const bool in)
113 return (in ? "1" : "0");
116 /** Template function to convert any input type to std::string
118 inline std::string ConvToStr(char in)
120 return std::string(in,1);
123 /** Template function to convert any input type to std::string
125 template <class T> inline std::string ConvToStr(const T &in)
127 std::stringstream tmp;
128 if (!(tmp << in)) return std::string();
132 /** Template function to convert any input type to any other type
133 * (usually an integer or numeric type)
135 template<typename T> inline long ConvToInt(const T &in)
137 std::stringstream tmp;
138 if (!(tmp << in)) return 0;
139 return atoi(tmp.str().c_str());
142 /** Template function to convert integer to char, storing result in *res and
143 * also returning the pointer to res. Based on Stuart Lowe's C/C++ Pages.
144 * @param T input value
145 * @param V result value
146 * @param R base to convert to
148 template<typename T, typename V, typename R> inline char* itoa(const T &in, V *res, R base)
150 if (base < 2 || base > 16) { *res = 0; return res; }
154 *out = "0123456789abcdef"[ std::abs( quotient % base ) ];
158 if ( in < 0 && base == 10) *out++ = '-';
159 std::reverse( res, out );
164 /** This class contains various STATS counters
165 * It is used by the InspIRCd class, which internally
166 * has an instance of it.
168 class serverstats : public classbase
171 /** Number of accepted connections
173 unsigned long statsAccept;
174 /** Number of failed accepts
176 unsigned long statsRefused;
177 /** Number of unknown commands seen
179 unsigned long statsUnknown;
180 /** Number of nickname collisions handled
182 unsigned long statsCollisions;
183 /** Number of DNS queries sent out
185 unsigned long statsDns;
186 /** Number of good DNS replies received
187 * NOTE: This may not tally to the number sent out,
188 * due to timeouts and other latency issues.
190 unsigned long statsDnsGood;
191 /** Number of bad (negative) DNS replies received
192 * NOTE: This may not tally to the number sent out,
193 * due to timeouts and other latency issues.
195 unsigned long statsDnsBad;
196 /** Number of inbound connections seen
198 unsigned long statsConnects;
199 /** Total bytes of data transmitted
202 /** Total bytes of data received
205 /** Cpu usage at last sample
208 /** Time last sample was read
211 /** The constructor initializes all the counts to zero
214 : statsAccept(0), statsRefused(0), statsUnknown(0), statsCollisions(0), statsDns(0),
215 statsDnsGood(0), statsDnsBad(0), statsConnects(0), statsSent(0.0), statsRecv(0.0)
220 /** A list of failed port bindings, used for informational purposes on startup */
221 typedef std::vector<std::pair<std::string, long> > FailedPortList;
225 DEFINE_HANDLER1(ProcessUserHandler, void, User*);
226 DEFINE_HANDLER1(IsNickHandler, bool, const char*);
227 DEFINE_HANDLER1(IsIdentHandler, bool, const char*);
228 DEFINE_HANDLER1(FindDescriptorHandler, User*, int);
229 DEFINE_HANDLER1(FloodQuitUserHandler, void, User*);
231 /* Forward declaration - required */
233 class BanCacheManager;
235 /** The main class of the irc server.
236 * This class contains instances of all the other classes
237 * in this software, with the exception of the base class,
238 * classbase. Amongst other things, it contains a ModeParser,
239 * a DNS object, a CommandParser object, and a list of active
240 * Module objects, and facilities for Module objects to
241 * interact with the core system it implements. You should
242 * NEVER attempt to instantiate a class of type InspIRCd
243 * yourself. If you do, this is equivalent to spawning a second
244 * IRC server, and could have catastrophic consequences for the
245 * program in terms of ram usage (basically, you could create
246 * an obese forkbomb built from recursively spawning irc servers!)
248 class CoreExport InspIRCd : public classbase
251 /** Holds the current UID. Used to generate the next one.
253 char current_uid[UUID_LENGTH];
255 /** Set up the signal handlers
259 /** Daemonize the ircd and close standard input/output streams
260 * @return True if the program daemonized succesfully
264 /** Iterate the list of BufferedSocket objects, removing ones which have timed out
265 * @param TIME the current time
267 void DoSocketTimeouts(time_t TIME);
269 /** Sets up UID subsystem
271 void InitialiseUID();
273 /** Perform background user events such as PING checks
275 void DoBackgroundUserStuff();
277 /** Returns true when all modules have done pre-registration checks on a user
278 * @param user The user to verify
279 * @return True if all modules have finished checking this user
281 bool AllModulesReportReady(User* user);
283 /** Logfile pathname specified on the commandline, or empty string
285 char LogFileName[MAXBUF];
287 /** The current time, updated in the mainloop
291 /** The time that was recorded last time around the mainloop
295 /** A 64k buffer used to read client lines into
297 char ReadBuffer[65535];
299 /** Used when connecting clients
301 irc::sockets::insp_sockaddr client, server;
303 /** Used when connecting clients
307 /** Nonblocking file writer
311 /** Time offset in seconds
312 * This offset is added to all calls to Time(). Use SetTimeDelta() to update
322 /** Global cull list, will be processed on next iteration
324 CullList GlobalCulls;
328 ProcessUserHandler HandleProcessUser;
329 IsNickHandler HandleIsNick;
330 IsIdentHandler HandleIsIdent;
331 FindDescriptorHandler HandleFindDescriptor;
332 FloodQuitUserHandler HandleFloodQuitUser;
334 /** BufferedSocket classes pending deletion after being closed.
335 * We don't delete these immediately as this may cause a segmentation fault.
337 std::map<BufferedSocket*,BufferedSocket*> SocketCull;
339 /** Globally accessible fake user record. This is used to force mode changes etc across s2s, etc.. bit ugly, but.. better than how this was done in 1.1
342 * SendMode expects a User* to send the numeric replies
343 * back to, so we create it a fake user that isnt in the user
344 * hash and set its descriptor to FD_MAGIC_NUMBER so the data
345 * falls into the abyss :p
349 /** Returns the next available UID for this server.
351 std::string GetUID();
353 /** Find a user in the UUID hash
354 * @param nick The nickname to find
355 * @return A pointer to the user, or NULL if the user does not exist
357 User *FindUUID(const std::string &);
359 /** Find a user in the UUID hash
360 * @param nick The nickname to find
361 * @return A pointer to the user, or NULL if the user does not exist
363 User *FindUUID(const char *);
365 /** Build the ISUPPORT string by triggering all modules On005Numeric events
367 void BuildISupport();
369 /** List of server names we've seen.
371 servernamelist servernames;
373 /** Time this ircd was booted
377 /** Config file pathname specified on the commandline or via ./configure
379 char ConfigFileName[MAXBUF];
381 /** Mode handler, handles mode setting and removal
385 /** Command parser, handles client to server commands
387 CommandParser* Parser;
389 /** Socket engine, handles socket activity events
393 /** LogManager handles logging.
397 /** ModuleManager contains everything related to loading/unloading
400 ModuleManager* Modules;
402 /** BanCacheManager is used to speed up checking of restrictions on connection
405 BanCacheManager *BanCache;
407 /** Stats class, holds miscellaneous stats counters
411 /** Server Config class, holds configuration file data
413 ServerConfig* Config;
415 /** Snomask manager - handles routing of snomask messages
420 /** DNS class, provides resolver facilities to the core and modules
424 /** Timer manager class, triggers Timer timer events
426 TimerManager* Timers;
428 /** X-Line manager. Handles G/K/Q/E line setting, removal and matching
430 XLineManager* XLines;
432 /** User manager. Various methods and data associated with users.
436 /** Channel list, a hash_map containing all channels XXX move to channel manager class
440 /** Set to the current signal recieved
444 /** Get the current time
445 * Because this only calls time() once every time around the mainloop,
446 * it is much faster than calling time() directly.
447 * @param delta True to use the delta as an offset, false otherwise
448 * @return The current time as an epoch value (time_t)
450 time_t Time(bool delta = false);
452 /** Set the time offset in seconds
453 * This offset is added to Time() to offset the system time by the specified
455 * @param delta The number of seconds to offset
456 * @return The old time delta
458 int SetTimeDelta(int delta);
460 /** Get the time offset in seconds
461 * @return The current time delta (in seconds)
465 /** Process a user whos socket has been flagged as active
466 * @param cu The user to process
467 * @return There is no actual return value, however upon exit, the user 'cu' may have been
468 * marked for deletion in the global CullList.
470 caller1<void, User*> ProcessUser;
472 /** Bind all ports specified in the configuration file.
473 * @param bail True if the function should bail back to the shell on failure
474 * @param found_ports The actual number of ports found in the config, as opposed to the number actually bound
475 * @return The number of ports actually bound without error
477 int BindPorts(bool bail, int &found_ports, FailedPortList &failed_ports);
479 /** Binds a socket on an already open file descriptor
480 * @param sockfd A valid file descriptor of an open socket
481 * @param port The port number to bind to
482 * @param addr The address to bind to (IP only)
483 * @return True if the port was bound successfully
485 bool BindSocket(int sockfd, int port, char* addr, bool dolisten = true);
487 /** Adds a server name to the list of servers we've seen
488 * @param The servername to add
490 void AddServerName(const std::string &servername);
492 /** Finds a cached char* pointer of a server name,
493 * This is used to optimize User by storing only the pointer to the name
494 * @param The servername to find
495 * @return A pointer to this name, gauranteed to never become invalid
497 const char* FindServerNamePtr(const std::string &servername);
499 /** Returns true if we've seen the given server name before
500 * @param The servername to find
501 * @return True if we've seen this server name before
503 bool FindServerName(const std::string &servername);
505 /** Gets the GECOS (description) field of the given server.
506 * If the servername is not that of the local server, the name
507 * is passed to handling modules which will attempt to determine
508 * the GECOS that bleongs to the given servername.
509 * @param servername The servername to find the description of
510 * @return The description of this server, or of the local server
512 std::string GetServerDescription(const char* servername);
514 /** Find a user in the nick hash.
515 * If the user cant be found in the nick hash check the uuid hash
516 * @param nick The nickname to find
517 * @return A pointer to the user, or NULL if the user does not exist
519 User* FindNick(const std::string &nick);
521 /** Find a user in the nick hash.
522 * If the user cant be found in the nick hash check the uuid hash
523 * @param nick The nickname to find
524 * @return A pointer to the user, or NULL if the user does not exist
526 User* FindNick(const char* nick);
528 /** Find a user in the nick hash ONLY
530 User* FindNickOnly(const char* nick);
532 /** Find a user in the nick hash ONLY
534 User* FindNickOnly(const std::string &nick);
536 /** Find a channel in the channels hash
537 * @param chan The channel to find
538 * @return A pointer to the channel, or NULL if the channel does not exist
540 Channel* FindChan(const std::string &chan);
542 /** Find a channel in the channels hash
543 * @param chan The channel to find
544 * @return A pointer to the channel, or NULL if the channel does not exist
546 Channel* FindChan(const char* chan);
548 /** Check for a 'die' tag in the config file, and abort if found
549 * @return Depending on the configuration, this function may never return
553 /** Check we aren't running as root, and exit if we are
554 * @return Depending on the configuration, this function may never return
558 /** Determine the right path for, and open, the logfile
559 * @param argv The argv passed to main() initially, used to calculate program path
560 * @param argc The argc passed to main() initially, used to calculate program path
561 * @return True if the log could be opened, false if otherwise
563 bool OpenLog(char** argv, int argc);
565 /** Close the currently open log file
569 /** Return true if a channel name is valid
570 * @param chname A channel name to verify
571 * @return True if the name is valid
573 bool IsChannel(const char *chname);
575 /** Return true if str looks like a server ID
576 * @param string to check against
578 bool IsSID(const std::string &str);
580 /** Rehash the local server
584 /** Handles incoming signals after being set
585 * @param signal the signal recieved
587 void SignalHandler(int signal);
589 /** Sets the signal recieved
590 * @param signal the signal recieved
592 static void SetSignal(int signal);
594 /** Causes the server to exit after unloading modules and
595 * closing all open file descriptors.
597 * @param The exit code to give to the operating system
598 * (See the ExitStatus enum for valid values)
600 void Exit(int status);
602 /** Causes the server to exit immediately with exit code 0.
603 * The status code is required for signal handlers, and ignored.
605 static void QuickExit(int status);
607 /** Return a count of channels on the network
608 * @return The number of channels
612 /** Send an error notice to all local users, opered and unopered
613 * @param s The error string to send
615 void SendError(const std::string &s);
617 /** Return true if a nickname is valid
618 * @param n A nickname to verify
619 * @return True if the nick is valid
621 caller1<bool, const char*> IsNick;
623 /** Return true if an ident is valid
624 * @param An ident to verify
625 * @return True if the ident is valid
627 caller1<bool, const char*> IsIdent;
629 /** Find a username by their file descriptor.
630 * It is preferred to use this over directly accessing the fd_ref_table array.
631 * @param socket The file descriptor of a user
632 * @return A pointer to the user if the user exists locally on this descriptor
634 caller1<User*, int> FindDescriptor;
636 /** Add a dns Resolver class to this server's active set
637 * @param r The resolver to add
638 * @param cached If this value is true, then the cache will
639 * be searched for the DNS result, immediately. If the value is
640 * false, then a request will be sent to the nameserver, and the
641 * result will not be immediately available. You should usually
642 * use the boolean value which you passed to the Resolver
643 * constructor, which Resolver will set appropriately depending
644 * on if cached results are available and haven't expired. It is
645 * however safe to force this value to false, forcing a remote DNS
646 * lookup, but not an update of the cache.
647 * @return True if the operation completed successfully. Note that
648 * if this method returns true, you should not attempt to access
649 * the resolver class you pass it after this call, as depending upon
650 * the request given, the object may be deleted!
652 bool AddResolver(Resolver* r, bool cached);
654 /** Add a command to this server's command parser
655 * @param f A Command command handler object to add
656 * @throw ModuleException Will throw ModuleExcption if the command already exists
658 void AddCommand(Command *f);
660 /** Send a modechange.
661 * The parameters provided are identical to that sent to the
662 * handler for class cmd_mode.
663 * @param parameters The mode parameters
664 * @param pcnt The number of items you have given in the first parameter
665 * @param user The user to send error messages to
667 void SendMode(const char **parameters, int pcnt, User *user);
669 /** Match two strings using pattern matching.
670 * This operates identically to the global function match(),
671 * except for that it takes std::string arguments rather than
673 * @param sliteral The literal string to match against
674 * @param spattern The pattern to match against. CIDR and globs are supported.
676 bool MatchText(const std::string &sliteral, const std::string &spattern);
678 /** Call the handler for a given command.
679 * @param commandname The command whos handler you wish to call
680 * @param parameters The mode parameters
681 * @param pcnt The number of items you have given in the first parameter
682 * @param user The user to execute the command as
683 * @return True if the command handler was called successfully
685 CmdResult CallCommandHandler(const std::string &commandname, const char** parameters, int pcnt, User* user);
687 /** Return true if the command is a module-implemented command and the given parameters are valid for it
688 * @param parameters The mode parameters
689 * @param pcnt The number of items you have given in the first parameter
690 * @param user The user to test-execute the command as
691 * @return True if the command handler is a module command, and there are enough parameters and the user has permission to the command
693 bool IsValidModuleCommand(const std::string &commandname, int pcnt, User* user);
695 /** Return true if the given parameter is a valid nick!user\@host mask
696 * @param mask A nick!user\@host masak to match against
697 * @return True i the mask is valid
699 bool IsValidMask(const std::string &mask);
701 /** Rehash the local server
705 /** Return the channel whos index number matches that provided
706 * @param The index number of the channel to fetch
707 * @return A channel record, or NUll if index < 0 or index >= InspIRCd::ChannelCount()
709 Channel* GetChannelIndex(long index);
711 /** Dump text to a user target, splitting it appropriately to fit
712 * @param User the user to dump the text to
713 * @param LinePrefix text to prefix each complete line with
714 * @param TextStream the text to send to the user
716 void DumpText(User* User, const std::string &LinePrefix, std::stringstream &TextStream);
718 /** Check if the given nickmask matches too many users, send errors to the given user
719 * @param nick A nickmask to match against
720 * @param user A user to send error text to
721 * @return True if the nick matches too many users
723 bool NickMatchesEveryone(const std::string &nick, User* user);
725 /** Check if the given IP mask matches too many users, send errors to the given user
726 * @param ip An ipmask to match against
727 * @param user A user to send error text to
728 * @return True if the ip matches too many users
730 bool IPMatchesEveryone(const std::string &ip, User* user);
732 /** Check if the given hostmask matches too many users, send errors to the given user
733 * @param mask A hostmask to match against
734 * @param user A user to send error text to
735 * @return True if the host matches too many users
737 bool HostMatchesEveryone(const std::string &mask, User* user);
739 /** Calculate a duration in seconds from a string in the form 1y2w3d4h6m5s
740 * @param str A string containing a time in the form 1y2w3d4h6m5s
741 * (one year, two weeks, three days, four hours, six minutes and five seconds)
742 * @return The total number of seconds
744 long Duration(const std::string &str);
746 /** Attempt to compare a password to a string from the config file.
747 * This will be passed to handling modules which will compare the data
748 * against possible hashed equivalents in the input string.
749 * @param ex The object (user, server, whatever) causing the comparison.
750 * @param data The data from the config file
751 * @param input The data input by the oper
752 * @param hashtype The hash from the config file
753 * @return 0 if the strings match, 1 or -1 if they do not
755 int PassCompare(Extensible* ex, const char* data,const char* input, const char* hashtype);
757 /** Check if a given server is a uline.
758 * An empty string returns true, this is by design.
759 * @param server The server to check for uline status
760 * @return True if the server is a uline OR the string is empty
762 bool ULine(const char* server);
764 /** Returns true if the uline is 'silent' (doesnt generate
765 * remote connect notices etc).
767 bool SilentULine(const char* server);
769 /** Returns the subversion revision ID of this ircd
770 * @return The revision ID or an empty string
772 std::string GetRevision();
774 /** Returns the full version string of this ircd
775 * @return The version string
777 std::string GetVersionString();
779 /** Attempt to write the process id to a given file
780 * @param filename The PID file to attempt to write to
781 * @return This function may bail if the file cannot be written
783 void WritePID(const std::string &filename);
785 /** This constructor initialises all the subsystems and reads the config file.
786 * @param argc The argument count passed to main()
787 * @param argv The argument list passed to main()
788 * @throw <anything> If anything is thrown from here and makes it to
789 * you, you should probably just give up and go home. Yes, really.
790 * It's that bad. Higher level classes should catch any non-fatal exceptions.
792 InspIRCd(int argc, char** argv);
794 /** Output a log message to the ircd.log file
795 * The text will only be output if the current loglevel
796 * is less than or equal to the level you provide
797 * @param level A log level from the DebugLevel enum
798 * @param text Format string of to write to the log
799 * @param ... Format arguments of text to write to the log
801 void Log(int level, const char* text, ...);
803 /** Output a log message to the ircd.log file
804 * The text will only be output if the current loglevel
805 * is less than or equal to the level you provide
806 * @param level A log level from the DebugLevel enum
807 * @param text Text to write to the log
809 void Log(int level, const std::string &text);
811 /** Send a line of WHOIS data to a user.
812 * @param user user to send the line to
813 * @param dest user being WHOISed
814 * @param numeric Numeric to send
815 * @param text Text of the numeric
817 void SendWhoisLine(User* user, User* dest, int numeric, const std::string &text);
819 /** Send a line of WHOIS data to a user.
820 * @param user user to send the line to
821 * @param dest user being WHOISed
822 * @param numeric Numeric to send
823 * @param format Format string for the numeric
824 * @param ... Parameters for the format string
826 void SendWhoisLine(User* user, User* dest, int numeric, const char* format, ...);
828 /** Quit a user for excess flood, and if they are not
829 * fully registered yet, temporarily zline their IP.
830 * @param current user to quit
832 caller1<void, User*> FloodQuitUser;
834 /** Restart the server.
835 * This function will not return. If an error occurs,
836 * it will throw an instance of CoreException.
837 * @param reason The restart reason to show to all clients
838 * @throw CoreException An instance of CoreException indicating the error from execv().
840 void Restart(const std::string &reason);
842 /** Prepare the ircd for restart or shutdown.
843 * This function unloads all modules which can be unloaded,
844 * closes all open sockets, and closes the logfile.
848 /** This copies the user and channel hash_maps into new hash maps.
849 * This frees memory used by the hash_map allocator (which it neglects
850 * to free, most of the time, using tons of ram)
852 void RehashUsersAndChans();
854 /** Resets the cached max bans value on all channels.
859 /** Return a time_t as a human-readable string.
861 std::string TimeString(time_t curtime);
863 /** Begin execution of the server.
864 * NOTE: this function NEVER returns. Internally,
865 * it will repeatedly loop.
866 * @return The return value for this function is undefined.
870 /** Force all BufferedSockets to be removed which are due to
873 void BufferedSocketCull();
875 char* GetReadBuffer()
877 return this->ReadBuffer;