2 * InspIRCd -- Internet Relay Chat Daemon
4 * Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
5 * Copyright (C) 2007-2008 Robin Burchell <robin+git@viroteck.net>
6 * Copyright (C) 2008 Pippijn van Steenhoven <pip88nl@gmail.com>
7 * Copyright (C) 2003-2008 Craig Edwards <craigedwards@brainbox.cc>
8 * Copyright (C) 2006-2007 Oliver Lupton <oliverlupton@gmail.com>
9 * Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
10 * Copyright (C) 2003 randomdan <???@???>
12 * This file is part of InspIRCd. InspIRCd is free software: you can
13 * redistribute it and/or modify it under the terms of the GNU General Public
14 * License as published by the Free Software Foundation, version 2.
16 * This program is distributed in the hope that it will be useful, but WITHOUT
17 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
18 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
21 * You should have received a copy of the GNU General Public License
22 * along with this program. If not, see <http://www.gnu.org/licenses/>.
29 #define _FILE_OFFSET_BITS 64
30 #ifndef _LARGEFILE_SOURCE
31 #define _LARGEFILE_SOURCE
37 #define printf_c printf
39 #include "inspircd_win32wrapper.h"
40 /** Windows defines these already */
45 #define CUSTOM_PRINTF(STRING, FIRST) __attribute__((format(printf, STRING, FIRST)))
47 #define CUSTOM_PRINTF(STRING, FIRST)
50 // Required system headers.
69 #include "inspircd_config.h"
70 #include "inspircd_version.h"
73 CoreExport extern InspIRCd* ServerInstance;
76 #include "cull_list.h"
77 #include "extensible.h"
85 #include "usermanager.h"
88 #include "command_parse.h"
90 #include "socketengine.h"
92 #include "filelogger.h"
94 #include "threadengine.h"
95 #include "configreader.h"
96 #include "inspstring.h"
100 #warning Potentially broken system, PATH_MAX undefined
101 #define PATH_MAX 4096
105 * Used to define the maximum number of parameters a command may have.
107 #define MAXPARAMETERS 127
109 /** Returned by some functions to indicate failure.
113 /** Support for librodent -
114 * see http://www.chatspike.net/index.php?z=64
116 #define ETIREDHAMSTERS EAGAIN
118 /** Template function to convert any input type to std::string
120 template<typename T> inline std::string ConvNumeric(const T &in)
122 if (in == 0) return "0";
127 *out = "0123456789"[ std::abs( (long)quotient % 10 ) ];
134 std::reverse(res,out);
138 /** Template function to convert any input type to std::string
140 inline std::string ConvToStr(const int in)
142 return ConvNumeric(in);
145 /** Template function to convert any input type to std::string
147 inline std::string ConvToStr(const long in)
149 return ConvNumeric(in);
152 /** Template function to convert any input type to std::string
154 inline std::string ConvToStr(const char* in)
159 /** Template function to convert any input type to std::string
161 inline std::string ConvToStr(const bool in)
163 return (in ? "1" : "0");
166 /** Template function to convert any input type to std::string
168 inline std::string ConvToStr(char in)
170 return std::string(in,1);
173 /** Template function to convert any input type to std::string
175 template <class T> inline std::string ConvToStr(const T &in)
177 std::stringstream tmp;
178 if (!(tmp << in)) return std::string();
182 /** Template function to convert any input type to any other type
183 * (usually an integer or numeric type)
185 template<typename T> inline long ConvToInt(const T &in)
187 std::stringstream tmp;
188 if (!(tmp << in)) return 0;
189 return atol(tmp.str().c_str());
192 /** This class contains various STATS counters
193 * It is used by the InspIRCd class, which internally
194 * has an instance of it.
199 /** Number of accepted connections
201 unsigned long statsAccept;
202 /** Number of failed accepts
204 unsigned long statsRefused;
205 /** Number of unknown commands seen
207 unsigned long statsUnknown;
208 /** Number of nickname collisions handled
210 unsigned long statsCollisions;
211 /** Number of DNS queries sent out
213 unsigned long statsDns;
214 /** Number of good DNS replies received
215 * NOTE: This may not tally to the number sent out,
216 * due to timeouts and other latency issues.
218 unsigned long statsDnsGood;
219 /** Number of bad (negative) DNS replies received
220 * NOTE: This may not tally to the number sent out,
221 * due to timeouts and other latency issues.
223 unsigned long statsDnsBad;
224 /** Number of inbound connections seen
226 unsigned long statsConnects;
227 /** Total bytes of data transmitted
229 unsigned long statsSent;
230 /** Total bytes of data received
232 unsigned long statsRecv;
233 /** Cpu usage at last sample
236 /** Time last sample was read
238 timespec LastSampled;
239 /** The constructor initializes all the counts to zero
242 : statsAccept(0), statsRefused(0), statsUnknown(0), statsCollisions(0), statsDns(0),
243 statsDnsGood(0), statsDnsBad(0), statsConnects(0), statsSent(0), statsRecv(0)
248 DEFINE_HANDLER2(IsNickHandler, bool, const char*, size_t);
249 DEFINE_HANDLER2(GenRandomHandler, void, char*, size_t);
250 DEFINE_HANDLER1(IsIdentHandler, bool, const char*);
251 DEFINE_HANDLER1(FloodQuitUserHandler, void, User*);
252 DEFINE_HANDLER2(IsChannelHandler, bool, const char*, size_t);
253 DEFINE_HANDLER1(IsSIDHandler, bool, const std::string&);
254 DEFINE_HANDLER1(RehashHandler, void, const std::string&);
255 DEFINE_HANDLER3(OnCheckExemptionHandler, ModResult, User*, Channel*, const std::string&);
257 /** The main class of the irc server.
258 * This class contains instances of all the other classes in this software.
259 * Amongst other things, it contains a ModeParser, a DNS object, a CommandParser
260 * object, and a list of active Module objects, and facilities for Module
261 * objects to interact with the core system it implements.
263 class CoreExport InspIRCd
266 /** Holds the current UID. Used to generate the next one.
268 char current_uid[UUID_LENGTH];
270 /** Set up the signal handlers
274 /** Daemonize the ircd and close standard input/output streams
275 * @return True if the program daemonized succesfully
279 /** Iterate the list of BufferedSocket objects, removing ones which have timed out
280 * @param TIME the current time
282 void DoSocketTimeouts(time_t TIME);
284 /** Increments the current UID by one.
286 void IncrementUID(int pos);
288 /** Perform background user events such as PING checks
290 void DoBackgroundUserStuff();
292 /** Returns true when all modules have done pre-registration checks on a user
293 * @param user The user to verify
294 * @return True if all modules have finished checking this user
296 bool AllModulesReportReady(LocalUser* user);
298 /** The current time, updated in the mainloop
300 struct timespec TIME;
302 /** A 64k buffer used to read socket data into
303 * NOTE: update ValidateNetBufferSize if you change this
305 char ReadBuffer[65535];
313 /** Global cull list, will be processed on next iteration
315 CullList GlobalCulls;
316 /** Actions that must happen outside of the current call stack */
317 ActionList AtomicActions;
321 IsNickHandler HandleIsNick;
322 IsIdentHandler HandleIsIdent;
323 FloodQuitUserHandler HandleFloodQuitUser;
324 OnCheckExemptionHandler HandleOnCheckExemption;
325 IsChannelHandler HandleIsChannel;
326 IsSIDHandler HandleIsSID;
327 RehashHandler HandleRehash;
328 GenRandomHandler HandleGenRandom;
330 /** 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
333 * SendMode expects a User* to send the numeric replies
334 * back to, so we create it a fake user that isnt in the user
335 * hash and set its descriptor to FD_MAGIC_NUMBER so the data
336 * falls into the abyss :p
338 FakeUser* FakeClient;
340 /** Returns the next available UID for this server.
342 std::string GetUID();
344 static const char LogHeader[];
346 /** Find a user in the UUID hash
347 * @param nick The nickname to find
348 * @return A pointer to the user, or NULL if the user does not exist
350 User* FindUUID(const std::string &);
352 /** Find a user in the UUID hash
353 * @param nick The nickname to find
354 * @return A pointer to the user, or NULL if the user does not exist
356 User* FindUUID(const char *);
358 /** Build the ISUPPORT string by triggering all modules On005Numeric events
360 void BuildISupport();
362 /** Time this ircd was booted
366 /** Config file pathname specified on the commandline or via ./configure
368 std::string ConfigFileName;
370 ExtensionManager Extensions;
372 /** Mode handler, handles mode setting and removal
376 /** Command parser, handles client to server commands
378 CommandParser* Parser;
380 /** Socket engine, handles socket activity events
384 /** Thread engine, Handles threading where required
386 ThreadEngine* Threads;
388 /** The thread/class used to read config files in REHASH and on startup
390 ConfigReaderThread* ConfigThread;
392 /** LogManager handles logging.
396 /** ModuleManager contains everything related to loading/unloading
399 ModuleManager* Modules;
401 /** BanCacheManager is used to speed up checking of restrictions on connection
404 BanCacheManager *BanCache;
406 /** Stats class, holds miscellaneous stats counters
410 /** Server Config class, holds configuration file data
412 ServerConfig* Config;
414 /** Snomask manager - handles routing of snomask messages
419 /** DNS class, provides resolver facilities to the core and modules
423 /** Timer manager class, triggers Timer timer events
425 TimerManager* Timers;
427 /** X-Line manager. Handles G/K/Q/E line setting, removal and matching
429 XLineManager* XLines;
431 /** User manager. Various methods and data associated with users.
435 /** Channel list, a hash_map containing all channels XXX move to channel manager class
439 /** List of the open ports
441 std::vector<ListenSocket*> ports;
443 /** Set to the current signal recieved
447 /** Protocol interface, overridden by server protocol modules
449 ProtocolInterface* PI;
451 /** Holds extensible for user nickforced
453 LocalIntExt NICKForced;
455 /** Holds extensible for user operquit
457 LocalStringExt OperQuit;
459 /** Get the current time
460 * Because this only calls time() once every time around the mainloop,
461 * it is much faster than calling time() directly.
462 * @return The current time as an epoch value (time_t)
464 inline time_t Time() { return TIME.tv_sec; }
465 /** The fractional time at the start of this mainloop iteration (nanoseconds) */
466 inline long Time_ns() { return TIME.tv_nsec; }
467 /** Update the current time. Don't call this unless you have reason to do so. */
470 /** Generate a random string with the given length
471 * @param length The length in bytes
472 * @param printable if false, the string will use characters 0-255; otherwise,
473 * it will be limited to 0x30-0x7E ('0'-'~', nonspace printable characters)
475 std::string GenRandomStr(int length, bool printable = true);
476 /** Generate a random integer.
477 * This is generally more secure than rand()
479 unsigned long GenRandomInt(unsigned long max);
481 /** Fill a buffer with random bits */
482 caller2<void, char*, size_t> GenRandom;
484 /** Bind all ports specified in the configuration file.
485 * @return The number of ports bound without error
487 int BindPorts(FailedPortList &failed_ports);
489 /** Binds a socket on an already open file descriptor
490 * @param sockfd A valid file descriptor of an open socket
491 * @param port The port number to bind to
492 * @param addr The address to bind to (IP only)
493 * @return True if the port was bound successfully
495 bool BindSocket(int sockfd, int port, const char* addr, bool dolisten = true);
497 /** Gets the GECOS (description) field of the given server.
498 * If the servername is not that of the local server, the name
499 * is passed to handling modules which will attempt to determine
500 * the GECOS that bleongs to the given servername.
501 * @param servername The servername to find the description of
502 * @return The description of this server, or of the local server
504 std::string GetServerDescription(const std::string& servername);
506 /** Find a user in the nick hash.
507 * If the user cant be found in the nick hash check the uuid hash
508 * @param nick The nickname to find
509 * @return A pointer to the user, or NULL if the user does not exist
511 User* FindNick(const std::string &nick);
513 /** Find a user in the nick hash.
514 * If the user cant be found in the nick hash check the uuid hash
515 * @param nick The nickname to find
516 * @return A pointer to the user, or NULL if the user does not exist
518 User* FindNick(const char* nick);
520 /** Find a user in the nick hash ONLY
522 User* FindNickOnly(const char* nick);
524 /** Find a user in the nick hash ONLY
526 User* FindNickOnly(const std::string &nick);
528 /** Find a channel in the channels hash
529 * @param chan The channel to find
530 * @return A pointer to the channel, or NULL if the channel does not exist
532 Channel* FindChan(const std::string &chan);
534 /** Find a channel in the channels hash
535 * @param chan The channel to find
536 * @return A pointer to the channel, or NULL if the channel does not exist
538 Channel* FindChan(const char* chan);
540 /** Check we aren't running as root, and exit if we are
541 * @return Depending on the configuration, this function may never return
545 /** Determine the right path for, and open, the logfile
546 * @param argv The argv passed to main() initially, used to calculate program path
547 * @param argc The argc passed to main() initially, used to calculate program path
548 * @return True if the log could be opened, false if otherwise
550 bool OpenLog(char** argv, int argc);
552 /** Return true if a channel name is valid
553 * @param chname A channel name to verify
554 * @return True if the name is valid
556 caller2<bool, const char*, size_t> IsChannel;
558 /** Return true if str looks like a server ID
559 * @param string to check against
561 caller1<bool, const std::string&> IsSID;
563 /** Rehash the local server
565 caller1<void, const std::string&> Rehash;
567 /** Handles incoming signals after being set
568 * @param signal the signal recieved
570 void SignalHandler(int signal);
572 /** Sets the signal recieved
573 * @param signal the signal recieved
575 static void SetSignal(int signal);
577 /** Causes the server to exit after unloading modules and
578 * closing all open file descriptors.
580 * @param The exit code to give to the operating system
581 * (See the ExitStatus enum for valid values)
583 void Exit(int status);
585 /** Causes the server to exit immediately with exit code 0.
586 * The status code is required for signal handlers, and ignored.
588 static void QuickExit(int status);
590 /** Return a count of channels on the network
591 * @return The number of channels
595 /** Send an error notice to all local users, opered and unopered
596 * @param s The error string to send
598 void SendError(const std::string &s);
600 /** Return true if a nickname is valid
601 * @param n A nickname to verify
602 * @return True if the nick is valid
604 caller2<bool, const char*, size_t> IsNick;
606 /** Return true if an ident is valid
607 * @param An ident to verify
608 * @return True if the ident is valid
610 caller1<bool, const char*> IsIdent;
612 /** Add a dns Resolver class to this server's active set
613 * @param r The resolver to add
614 * @param cached If this value is true, then the cache will
615 * be searched for the DNS result, immediately. If the value is
616 * false, then a request will be sent to the nameserver, and the
617 * result will not be immediately available. You should usually
618 * use the boolean value which you passed to the Resolver
619 * constructor, which Resolver will set appropriately depending
620 * on if cached results are available and haven't expired. It is
621 * however safe to force this value to false, forcing a remote DNS
622 * lookup, but not an update of the cache.
623 * @return True if the operation completed successfully. Note that
624 * if this method returns true, you should not attempt to access
625 * the resolver class you pass it after this call, as depending upon
626 * the request given, the object may be deleted!
628 bool AddResolver(Resolver* r, bool cached);
630 /** Add a command to this server's command parser
631 * @param f A Command command handler object to add
632 * @throw ModuleException Will throw ModuleExcption if the command already exists
634 inline void AddCommand(Command *f)
636 Modules->AddService(*f);
639 /** Send a modechange.
640 * The parameters provided are identical to that sent to the
641 * handler for class cmd_mode.
642 * @param parameters The mode parameters
643 * @param user The user to send error messages to
645 void SendMode(const std::vector<std::string>& parameters, User *user);
647 /** Send a modechange and route it to the network.
648 * The parameters provided are identical to that sent to the
649 * handler for class cmd_mode.
650 * @param parameters The mode parameters
651 * @param user The user to send error messages to
653 void SendGlobalMode(const std::vector<std::string>& parameters, User *user);
655 /** Match two strings using pattern matching, optionally, with a map
656 * to check case against (may be NULL). If map is null, match will be case insensitive.
657 * @param str The literal string to match against
658 * @param mask The glob pattern to match against.
660 static bool Match(const std::string &str, const std::string &mask, unsigned const char *map = NULL);
661 static bool Match(const char *str, const char *mask, unsigned const char *map = NULL);
663 /** Match two strings using pattern matching, optionally, with a map
664 * to check case against (may be NULL). If map is null, match will be case insensitive.
665 * Supports CIDR patterns as well as globs.
666 * @param str The literal string to match against
667 * @param mask The glob or CIDR pattern to match against.
669 static bool MatchCIDR(const std::string &str, const std::string &mask, unsigned const char *map = NULL);
670 static bool MatchCIDR(const char *str, const char *mask, unsigned const char *map = NULL);
672 /** Call the handler for a given command.
673 * @param commandname The command whos handler you wish to call
674 * @param parameters The mode parameters
675 * @param pcnt The number of items you have given in the first parameter
676 * @param user The user to execute the command as
677 * @return True if the command handler was called successfully
679 CmdResult CallCommandHandler(const std::string &commandname, const std::vector<std::string>& parameters, User* user);
681 /** Return true if the command is a module-implemented command and the given parameters are valid for it
682 * @param parameters The mode parameters
683 * @param pcnt The number of items you have given in the first parameter
684 * @param user The user to test-execute the command as
685 * @return True if the command handler is a module command, and there are enough parameters and the user has permission to the command
687 bool IsValidModuleCommand(const std::string &commandname, int pcnt, User* user);
689 /** Return true if the given parameter is a valid nick!user\@host mask
690 * @param mask A nick!user\@host masak to match against
691 * @return True i the mask is valid
693 bool IsValidMask(const std::string &mask);
695 /** Rehash the local server
699 /** Check if the given nickmask matches too many users, send errors to the given user
700 * @param nick A nickmask to match against
701 * @param user A user to send error text to
702 * @return True if the nick matches too many users
704 bool NickMatchesEveryone(const std::string &nick, User* user);
706 /** Check if the given IP mask matches too many users, send errors to the given user
707 * @param ip An ipmask to match against
708 * @param user A user to send error text to
709 * @return True if the ip matches too many users
711 bool IPMatchesEveryone(const std::string &ip, User* user);
713 /** Check if the given hostmask matches too many users, send errors to the given user
714 * @param mask A hostmask to match against
715 * @param user A user to send error text to
716 * @return True if the host matches too many users
718 bool HostMatchesEveryone(const std::string &mask, User* user);
720 /** Calculate a duration in seconds from a string in the form 1y2w3d4h6m5s
721 * @param str A string containing a time in the form 1y2w3d4h6m5s
722 * (one year, two weeks, three days, four hours, six minutes and five seconds)
723 * @return The total number of seconds
725 long Duration(const std::string &str);
727 /** Attempt to compare a password to a string from the config file.
728 * This will be passed to handling modules which will compare the data
729 * against possible hashed equivalents in the input string.
730 * @param ex The object (user, server, whatever) causing the comparison.
731 * @param data The data from the config file
732 * @param input The data input by the oper
733 * @param hashtype The hash from the config file
734 * @return 0 if the strings match, 1 or -1 if they do not
736 int PassCompare(Extensible* ex, const std::string &data, const std::string &input, const std::string &hashtype);
738 /** Check if a given server is a uline.
739 * An empty string returns true, this is by design.
740 * @param server The server to check for uline status
741 * @return True if the server is a uline OR the string is empty
743 bool ULine(const std::string& server);
745 /** Returns true if the uline is 'silent' (doesnt generate
746 * remote connect notices etc).
748 bool SilentULine(const std::string& server);
750 /** Returns the full version string of this ircd
751 * @return The version string
753 std::string GetVersionString(bool rawversion = false);
755 /** Attempt to write the process id to a given file
756 * @param filename The PID file to attempt to write to
757 * @return This function may bail if the file cannot be written
759 void WritePID(const std::string &filename);
761 /** This constructor initialises all the subsystems and reads the config file.
762 * @param argc The argument count passed to main()
763 * @param argv The argument list passed to main()
764 * @throw <anything> If anything is thrown from here and makes it to
765 * you, you should probably just give up and go home. Yes, really.
766 * It's that bad. Higher level classes should catch any non-fatal exceptions.
768 InspIRCd(int argc, char** argv);
770 /** Send a line of WHOIS data to a user.
771 * @param user user to send the line to
772 * @param dest user being WHOISed
773 * @param numeric Numeric to send
774 * @param text Text of the numeric
776 void SendWhoisLine(User* user, User* dest, int numeric, const std::string &text);
778 /** Send a line of WHOIS data to a user.
779 * @param user user to send the line to
780 * @param dest user being WHOISed
781 * @param numeric Numeric to send
782 * @param format Format string for the numeric
783 * @param ... Parameters for the format string
785 void SendWhoisLine(User* user, User* dest, int numeric, const char* format, ...) CUSTOM_PRINTF(5, 6);
789 void DoStats(char statschar, User* user, string_list &results);
793 void DoWhois(User* user, User* dest,unsigned long signon, unsigned long idle, const char* nick);
795 /** Quit a user for excess flood, and if they are not
796 * fully registered yet, temporarily zline their IP.
797 * @param current user to quit
799 caller1<void, User*> FloodQuitUser;
801 /** Called to check whether a channel restriction mode applies to a user
802 * @param User that is attempting some action
803 * @param Channel that the action is being performed on
806 caller3<ModResult, User*, Channel*, const std::string&> OnCheckExemption;
808 /** Restart the server.
809 * This function will not return. If an error occurs,
810 * it will throw an instance of CoreException.
811 * @param reason The restart reason to show to all clients
812 * @throw CoreException An instance of CoreException indicating the error from execv().
814 void Restart(const std::string &reason);
816 /** Prepare the ircd for restart or shutdown.
817 * This function unloads all modules which can be unloaded,
818 * closes all open sockets, and closes the logfile.
822 /** This copies the user and channel hash_maps into new hash maps.
823 * This frees memory used by the hash_map allocator (which it neglects
824 * to free, most of the time, using tons of ram)
826 void RehashUsersAndChans();
828 /** Resets the cached max bans value on all channels.
833 /** Return a time_t as a human-readable string.
835 std::string TimeString(time_t curtime);
837 /** Begin execution of the server.
838 * NOTE: this function NEVER returns. Internally,
839 * it will repeatedly loop.
840 * @return The return value for this function is undefined.
844 /** Adds an extban char to the 005 token.
846 void AddExtBanChar(char c);
848 char* GetReadBuffer()
850 return this->ReadBuffer;
857 class CommandModule : public Module
861 CommandModule() : cmd(this)
867 ServerInstance->Modules->AddService(cmd);
872 return Version(cmd.name, VF_VENDOR|VF_CORE);