2 * InspIRCd -- Internet Relay Chat Daemon
4 * Copyright (C) 2019 iwalkalone <iwalkalone69@gmail.com>
5 * Copyright (C) 2013 Adam <Adam@anope.org>
6 * Copyright (C) 2012-2016, 2018 Attila Molnar <attilamolnar@hush.com>
7 * Copyright (C) 2012-2013, 2016-2020 Sadie Powell <sadie@witchery.services>
8 * Copyright (C) 2012 Robby <robby@chatbelgie.be>
9 * Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
10 * Copyright (C) 2009 Uli Schlachter <psychon@inspircd.org>
11 * Copyright (C) 2008 Thomas Stagner <aquanight@inspircd.org>
12 * Copyright (C) 2007-2009 Robin Burchell <robin+git@viroteck.net>
13 * Copyright (C) 2007-2008, 2010 Craig Edwards <brain@inspircd.org>
14 * Copyright (C) 2007 Oliver Lupton <om@inspircd.org>
15 * Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
17 * This file is part of InspIRCd. InspIRCd is free software: you can
18 * redistribute it and/or modify it under the terms of the GNU General Public
19 * License as published by the Free Software Foundation, version 2.
21 * This program is distributed in the hope that it will be useful, but WITHOUT
22 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
23 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
26 * You should have received a copy of the GNU General Public License
27 * along with this program. If not, see <http://www.gnu.org/licenses/>.
33 #include "moduledefs.h"
37 #include "inspsocket.h"
41 /** Used to specify the behaviour of a module. */
44 /** The module has no special attributes. */
47 /** The module is a coremod and can be assumed to be loaded on all servers. */
50 /* The module is included with InspIRCd. */
53 /** The module MUST be loaded on all servers on a network to link. */
56 /** The module SHOULD be loaded on all servers on a network for consistency. */
60 #define MOD_RES_ALLOW (ModResult(1))
61 #define MOD_RES_PASSTHRU (ModResult(0))
62 #define MOD_RES_DENY (ModResult(-1))
64 /** Used to represent an allow/deny module result.
65 * Not constructed as an enum because it reverses the value logic of some functions;
66 * the compiler will inline accesses to have the same efficiency as integer operations.
70 ModResult() : res(0) {}
71 explicit ModResult(int r) : res(r) {}
72 inline bool operator==(const ModResult& r) const
76 inline bool operator!=(const ModResult& r) const
80 inline bool operator!() const
84 inline bool check(bool def) const
86 return (res == 1 || (res == 0 && def));
89 * Merges two results, preferring ALLOW to DENY
91 inline ModResult operator+(const ModResult& r) const
93 if (res == r.res || r.res == 0)
97 // they are different, and neither is passthru
103 * This #define allows us to call a method in all
104 * loaded modules in a readable simple way, e.g.:
105 * 'FOREACH_MOD(OnConnect,(user));'
107 #define FOREACH_MOD(y,x) do { \
108 const Module::List& _handlers = ServerInstance->Modules->EventHandlers[I_ ## y]; \
109 for (Module::List::const_reverse_iterator _i = _handlers.rbegin(), _next; _i != _handlers.rend(); _i = _next) \
117 catch (CoreException& modexcept) \
119 ServerInstance->Logs->Log("MODULE", LOG_DEFAULT, "Exception caught: " + modexcept.GetReason()); \
125 * Custom module result handling loop. This is a paired macro, and should only
126 * be used with while_each_hook.
128 * See src/channels.cpp for an example of use.
130 #define DO_EACH_HOOK(n,v,args) \
132 const Module::List& _handlers = ServerInstance->Modules->EventHandlers[I_ ## n]; \
133 for (Module::List::const_reverse_iterator _i = _handlers.rbegin(), _next; _i != _handlers.rend(); _i = _next) \
141 #define WHILE_EACH_HOOK(n) \
143 catch (CoreException& except_ ## n) \
145 ServerInstance->Logs->Log("MODULE", LOG_DEFAULT, "Exception caught: " + (except_ ## n).GetReason()); \
151 * Module result iterator
152 * Runs the given hook until some module returns a useful result.
154 * Example: ModResult result;
155 * FIRST_MOD_RESULT(OnUserPreNick, result, (user, newnick))
157 #define FIRST_MOD_RESULT(n,v,args) do { \
158 v = MOD_RES_PASSTHRU; \
159 DO_EACH_HOOK(n,v,args) \
161 if (v != MOD_RES_PASSTHRU) \
164 WHILE_EACH_HOOK(n); \
167 /** Holds a module's Version information.
168 * The members (set by the constructor only) indicate details as to the version number
169 * of a module. A class of type Version is returned by the GetVersion method of the Module class.
171 class CoreExport Version
174 /** Module description
176 const std::string description;
182 /** Server linking description string */
183 const std::string link_data;
185 /** Simple module version */
186 Version(const std::string &desc, int flags = VF_NONE);
188 /** Complex version information, including linking compatability data */
189 Version(const std::string &desc, int flags, const std::string& linkdata);
192 class CoreExport DataProvider : public ServiceProvider
195 DataProvider(Module* Creator, const std::string& Name)
196 : ServiceProvider(Creator, Name, SERVICE_DATA) {}
199 /** Priority types which can be used by Module::Prioritize()
201 enum Priority { PRIORITY_FIRST, PRIORITY_LAST, PRIORITY_BEFORE, PRIORITY_AFTER };
203 /** Implementation-specific flags which may be set in Module::Implements()
207 I_OnUserConnect, I_OnUserPreQuit, I_OnUserQuit, I_OnUserDisconnect, I_OnUserJoin, I_OnUserPart,
208 I_OnSendSnotice, I_OnUserPreJoin, I_OnUserPreKick, I_OnUserKick, I_OnOper,
209 I_OnUserPreInvite, I_OnUserInvite, I_OnUserPreMessage, I_OnUserPreNick,
210 I_OnUserPostMessage, I_OnUserMessageBlocked, I_OnMode, I_OnShutdown,
211 I_OnDecodeMetaData, I_OnAcceptConnection, I_OnUserInit, I_OnUserPostInit,
212 I_OnChangeHost, I_OnChangeRealName, I_OnAddLine, I_OnDelLine, I_OnExpireLine,
213 I_OnUserPostNick, I_OnPreMode, I_On005Numeric, I_OnKill, I_OnLoadModule,
214 I_OnUnloadModule, I_OnBackgroundTimer, I_OnPreCommand, I_OnCheckReady, I_OnCheckInvite,
215 I_OnRawMode, I_OnCheckKey, I_OnCheckLimit, I_OnCheckBan, I_OnCheckChannelBan, I_OnExtBanCheck,
216 I_OnPreChangeHost, I_OnPreTopicChange, I_OnConnectionFail,
217 I_OnPostTopicChange, I_OnPostConnect, I_OnPostDeoper,
218 I_OnPreChangeRealName, I_OnUserRegister, I_OnChannelPreDelete, I_OnChannelDelete,
219 I_OnPostOper, I_OnPostCommand, I_OnCommandBlocked, I_OnPostJoin,
220 I_OnBuildNeighborList, I_OnGarbageCollect, I_OnSetConnectClass,
221 I_OnUserMessage, I_OnPassCompare, I_OnNumeric,
222 I_OnPreRehash, I_OnModuleRehash, I_OnChangeIdent, I_OnSetUserIP,
223 I_OnServiceAdd, I_OnServiceDel, I_OnUserWrite,
227 /** Base class for all InspIRCd modules
228 * This class is the base class for InspIRCd modules. All modules must inherit from this class,
229 * its methods will be called when irc server events occur. class inherited from module must be
230 * instantiated by the ModuleFactory class (see relevent section) for the module to be initialised.
232 class CoreExport Module : public classbase, public usecountbase
234 /** Detach an event from this module
235 * @param i Event type to detach
237 void DetachEvent(Implementation i);
240 /** A list of modules. */
241 typedef std::vector<Module*> List;
243 /** File that this module was loaded from
245 std::string ModuleSourceFile;
247 /** Reference to the dlopen() value
249 DLLManager* ModuleDLLManager;
251 /** If true, this module will be unloaded soon, further unload attempts will fail
252 * Value is used by the ModuleManager internally, you should not modify it
256 /** Default constructor.
257 * Creates a module class. Don't do any type of hook registration or checks
258 * for other modules here; do that in init().
263 * \exception ModuleException Throwing this class, or any class derived from ModuleException, causes loading of the module to abort.
265 virtual void init() {}
267 /** Clean up prior to destruction
268 * If you override, you must call this AFTER your module's cleanup
270 CullResult cull() CXX11_OVERRIDE;
272 /** Default destructor.
273 * destroys a module class
277 virtual void Prioritize()
281 /** This method is called when you should reload module specific configuration:
282 * on boot, on a /REHASH and on module load.
283 * @param status The current status, can be inspected for more information;
284 * also used for reporting configuration errors and warnings.
286 virtual void ReadConfig(ConfigStatus& status);
288 /** Returns the version number of a Module.
289 * The method should return a Version object with its version information assigned via
292 virtual Version GetVersion() = 0;
294 /** Called when a user connects.
295 * The details of the connecting user are available to you in the parameter User *user
296 * @param user The user who is connecting
298 virtual void OnUserConnect(LocalUser* user);
300 /** Called when before a user quits.
301 * The details of the exiting user are available to you in the parameter User *user
302 * This event is only called when the user is fully registered when they quit. To catch
303 * raw disconnections, use the OnUserDisconnect method.
304 * @param user The user who is quitting
305 * @param message The user's quit message (as seen by non-opers)
306 * @param oper_message The user's quit message (as seen by opers)
308 virtual ModResult OnUserPreQuit(LocalUser* user, std::string& message, std::string& oper_message);
310 /** Called when a user quits.
311 * The details of the exiting user are available to you in the parameter User *user
312 * This event is only called when the user is fully registered when they quit. To catch
313 * raw disconnections, use the OnUserDisconnect method.
314 * @param user The user who is quitting
315 * @param message The user's quit message (as seen by non-opers)
316 * @param oper_message The user's quit message (as seen by opers)
318 virtual void OnUserQuit(User* user, const std::string &message, const std::string &oper_message);
320 /** Called whenever a user's socket is closed.
321 * The details of the exiting user are available to you in the parameter User *user
322 * This event is called for all users, registered or not, as a cleanup method for modules
323 * which might assign resources to user, such as dns lookups, objects and sockets.
324 * @param user The user who is disconnecting
326 virtual void OnUserDisconnect(LocalUser* user);
328 /** Called whenever a channel is about to be deleted
329 * @param chan The channel being deleted
330 * @return An integer specifying whether or not the channel may be deleted. 0 for yes, 1 for no.
332 virtual ModResult OnChannelPreDelete(Channel *chan);
334 /** Called whenever a channel is deleted, either by QUIT, KICK or PART.
335 * @param chan The channel being deleted
337 virtual void OnChannelDelete(Channel* chan);
339 /** Called when a user joins a channel.
340 * The details of the joining user are available to you in the parameter User *user,
341 * and the details of the channel they have joined is available in the variable Channel *channel
342 * @param memb The channel membership being created
343 * @param sync This is set to true if the JOIN is the result of a network sync and the remote user is being introduced
344 * to a channel due to the network sync.
345 * @param created This is true if the join created the channel
346 * @param except_list A list of users not to send to.
348 virtual void OnUserJoin(Membership* memb, bool sync, bool created, CUList& except_list);
350 /** Called after a user joins a channel
351 * Identical to OnUserJoin, but called immediately afterwards, when any linking module has
353 * @param memb The channel membership created
355 virtual void OnPostJoin(Membership* memb);
357 /** Called when a user parts a channel.
358 * The details of the leaving user are available to you in the parameter User *user,
359 * and the details of the channel they have left is available in the variable Channel *channel
360 * @param memb The channel membership being destroyed
361 * @param partmessage The part message, or an empty string (may be modified)
362 * @param except_list A list of users to not send to.
364 virtual void OnUserPart(Membership* memb, std::string &partmessage, CUList& except_list);
366 /** Called on rehash.
367 * This method is called prior to a /REHASH or when a SIGHUP is received from the operating
368 * system. This is called in all cases -- including when this server will not execute the
369 * rehash because it is directed at a remote server.
371 * @param user The user performing the rehash, if any. If this is server initiated, the value of
372 * this variable will be NULL.
373 * @param parameter The (optional) parameter given to REHASH from the user. Empty when server
376 virtual void OnPreRehash(User* user, const std::string ¶meter);
378 /** Called on rehash.
379 * This method is called when a user initiates a module-specific rehash. This can be used to do
380 * expensive operations (such as reloading SSL certificates) that are not executed on a normal
381 * rehash for efficiency. A rehash of this type does not reload the core configuration.
383 * @param user The user performing the rehash.
384 * @param parameter The parameter given to REHASH
386 virtual void OnModuleRehash(User* user, const std::string ¶meter);
388 /** Called whenever a snotice is about to be sent to a snomask.
389 * snomask and type may both be modified; the message may not.
390 * @param snomask The snomask the message is going to (e.g. 'A')
391 * @param type The textual description the snomask will go to (e.g. 'OPER')
392 * @param message The text message to be sent via snotice
393 * @return 1 to block the snotice from being sent entirely, 0 else.
395 virtual ModResult OnSendSnotice(char &snomask, std::string &type, const std::string &message);
397 /** Called whenever a user is about to join a channel, before any processing is done.
398 * Returning a value of 1 from this function stops the process immediately, causing no
399 * output to be sent to the user by the core. If you do this you must produce your own numerics,
400 * notices etc. This is useful for modules which may want to mimic +b, +k, +l etc. Returning -1 from
401 * this function forces the join to be allowed, bypassing restrictions such as banlists, invite, keys etc.
405 * If the user joins a NEW channel which does not exist yet, OnUserPreJoin will be called BEFORE the channel
406 * record is created. This will cause Channel* chan to be NULL. There is very little you can do in form of
407 * processing on the actual channel record at this point, however the channel NAME will still be passed in
408 * char* cname, so that you could for example implement a channel blacklist or whitelist, etc.
409 * @param user The user joining the channel
410 * @param chan If the channel is a new channel, this will be NULL, otherwise it will be a pointer to the channel being joined
411 * @param cname The channel name being joined. For new channels this is valid where chan is not.
412 * @param privs A string containing the users privilages when joining the channel. For new channels this will contain "o".
413 * You may alter this string to alter the user's modes on the channel.
414 * @param keygiven The key given to join the channel, or an empty string if none was provided
415 * @return 1 To prevent the join, 0 to allow it.
417 virtual ModResult OnUserPreJoin(LocalUser* user, Channel* chan, const std::string& cname, std::string& privs, const std::string& keygiven);
419 /** Called whenever a user is about to be kicked.
420 * Returning a value of 1 from this function stops the process immediately, causing no
421 * output to be sent to the user by the core. If you do this you must produce your own numerics,
423 * @param source The user issuing the kick
424 * @param memb The channel membership of the user who is being kicked.
425 * @param reason The kick reason
426 * @return 1 to prevent the kick, 0 to continue normally, -1 to explicitly allow the kick regardless of normal operation
428 virtual ModResult OnUserPreKick(User* source, Membership* memb, const std::string &reason);
430 /** Called whenever a user is kicked.
431 * If this method is called, the kick is already underway and cannot be prevented, so
432 * to prevent a kick, please use Module::OnUserPreKick instead of this method.
433 * @param source The user issuing the kick
434 * @param memb The channel membership of the user who was kicked.
435 * @param reason The kick reason
436 * @param except_list A list of users to not send to.
438 virtual void OnUserKick(User* source, Membership* memb, const std::string &reason, CUList& except_list);
440 /** Called whenever a user opers locally.
441 * The User will contain the oper mode 'o' as this function is called after any modifications
442 * are made to the user's structure by the core.
443 * @param user The user who is opering up
444 * @param opertype The opers type name
446 virtual void OnOper(User* user, const std::string &opertype);
448 /** Called after a user opers locally.
449 * This is identical to Module::OnOper(), except it is called after OnOper so that other modules
450 * can be gauranteed to already have processed the oper-up, for example m_spanningtree has sent
451 * out the OPERTYPE, etc.
452 * @param user The user who is opering up
453 * @param opername The name of the oper that the user is opering up to. Only valid locally. Empty string otherwise.
454 * @param opertype The opers type name
456 virtual void OnPostOper(User* user, const std::string &opername, const std::string &opertype);
458 /** Called after a user deopers locally.
459 * @param user The user who has deopered.
461 virtual void OnPostDeoper(User* user);
463 /** Called whenever a user is about to invite another user into a channel, before any processing is done.
464 * Returning 1 from this function stops the process immediately, causing no
465 * output to be sent to the user by the core. If you do this you must produce your own numerics,
466 * notices etc. This is useful for modules which may want to filter invites to channels.
467 * @param source The user who is issuing the INVITE
468 * @param dest The user being invited
469 * @param channel The channel the user is being invited to
470 * @param timeout The time the invite will expire (0 == never)
471 * @return 1 to deny the invite, 0 to check whether or not the user has permission to invite, -1 to explicitly allow the invite
473 virtual ModResult OnUserPreInvite(User* source,User* dest,Channel* channel, time_t timeout);
475 /** Called after a user has been successfully invited to a channel.
476 * You cannot prevent the invite from occuring using this function, to do that,
477 * use OnUserPreInvite instead.
478 * @param source The user who is issuing the INVITE
479 * @param dest The user being invited
480 * @param channel The channel the user is being invited to
481 * @param timeout The time the invite will expire (0 == never)
482 * @param notifyrank Rank required to get an invite announcement (if enabled)
483 * @param notifyexcepts List of users to not send the default NOTICE invite announcement to
485 virtual void OnUserInvite(User* source, User* dest, Channel* channel, time_t timeout, unsigned int notifyrank, CUList& notifyexcepts);
487 /** Called before a user sends a message to a channel, a user, or a server glob mask.
488 * @param user The user sending the message.
489 * @param target The target of the message. This can either be a channel, a user, or a server
491 * @param details Details about the message such as the message text and type. See the
492 * MessageDetails class for more information.
493 * @return MOD_RES_ALLOW to explicitly allow the message, MOD_RES_DENY to explicitly deny the
494 * message, or MOD_RES_PASSTHRU to let another module handle the event.
496 virtual ModResult OnUserPreMessage(User* user, const MessageTarget& target, MessageDetails& details);
498 /** Called when sending a message to all "neighbors" of a given user -
499 * that is, all users that share a common channel. This is used in
500 * commands such as NICK, QUIT, etc.
501 * @param source The source of the message
502 * @param include_c Channels to scan for users to include
503 * @param exceptions Map of user->bool that overrides the inclusion decision
505 * Set exceptions[user] = true to include, exceptions[user] = false to exclude
507 virtual void OnBuildNeighborList(User* source, IncludeChanList& include_c, std::map<User*, bool>& exceptions);
509 /** Called before local nickname changes. This can be used to implement Q-lines etc.
510 * If your method returns nonzero, the nickchange is silently forbidden, and it is down to your
511 * module to generate some meaninful output.
512 * @param user The username changing their nick
513 * @param newnick Their new nickname
514 * @return 1 to deny the change, 0 to allow
516 virtual ModResult OnUserPreNick(LocalUser* user, const std::string& newnick);
518 /** Called immediately after a user sends a message to a channel, a user, or a server glob mask.
519 * @param user The user sending the message.
520 * @param target The target of the message. This can either be a channel, a user, or a server
522 * @param details Details about the message such as the message text and type. See the
523 * MessageDetails class for more information.
525 virtual void OnUserPostMessage(User* user, const MessageTarget& target, const MessageDetails& details);
527 /** Called immediately before a user sends a message to a channel, a user, or a server glob mask.
528 * @param user The user sending the message.
529 * @param target The target of the message. This can either be a channel, a user, or a server
531 * @param details Details about the message such as the message text and type. See the
532 * MessageDetails class for more information.
534 virtual void OnUserMessage(User* user, const MessageTarget& target, const MessageDetails& details);
536 /** Called when a message sent by a user to a channel, a user, or a server glob mask is blocked.
537 * @param user The user sending the message.
538 * @param target The target of the message. This can either be a channel, a user, or a server
540 * @param details Details about the message such as the message text and type. See the
541 * MessageDetails class for more information.
543 virtual void OnUserMessageBlocked(User* user, const MessageTarget& target, const MessageDetails& details);
545 /** Called after every MODE command sent from a user
546 * Either the usertarget or the chantarget variable contains the target of the modes,
547 * the actual target will have a non-NULL pointer.
548 * All changed modes are available in the changelist object.
549 * @param user The user sending the MODEs
550 * @param usertarget The target user of the modes, NULL if the target is a channel
551 * @param chantarget The target channel of the modes, NULL if the target is a user
552 * @param changelist The changed modes.
553 * @param processflags Flags passed to ModeParser::Process(), see ModeParser::ModeProcessFlags
554 * for the possible flags.
556 virtual void OnMode(User* user, User* usertarget, Channel* chantarget, const Modes::ChangeList& changelist, ModeParser::ModeProcessFlag processflags);
558 /** Allows module data, sent via ProtoSendMetaData, to be decoded again by a receiving module.
559 * Please see src/modules/m_swhois.cpp for a working example of how to use this method call.
560 * @param target The Channel* or User* that data should be added to
561 * @param extname The extension name which is being sent
562 * @param extdata The extension data, encoded at the other end by an identical module
564 virtual void OnDecodeMetaData(Extensible* target, const std::string &extname, const std::string &extdata);
566 /** Called whenever a user's hostname is changed.
567 * This event triggers after the host has been set.
568 * @param user The user whos host is being changed
569 * @param newhost The new hostname being set
571 virtual void OnChangeHost(User* user, const std::string &newhost);
573 /** Called whenever a user's real name is changed.
574 * This event triggers after the name has been set.
575 * @param user The user who's real name is being changed
576 * @param real The new real name being set on the user
578 virtual void OnChangeRealName(User* user, const std::string& real);
580 /** Called whenever a user's IDENT is changed.
581 * This event triggers after the name has been set.
582 * @param user The user who's IDENT is being changed
583 * @param ident The new IDENT being set on the user
585 virtual void OnChangeIdent(User* user, const std::string &ident);
587 /** Called whenever an xline is added by a local user.
588 * This method is triggered after the line is added.
589 * @param source The sender of the line or NULL for local server
590 * @param line The xline being added
592 virtual void OnAddLine(User* source, XLine* line);
594 /** Called whenever an xline is deleted MANUALLY. See OnExpireLine for expiry.
595 * This method is triggered after the line is deleted.
596 * @param source The user removing the line or NULL for local server
597 * @param line the line being deleted
599 virtual void OnDelLine(User* source, XLine* line);
601 /** Called whenever an xline expires.
602 * This method is triggered after the line is deleted.
603 * @param line The line being deleted.
605 virtual void OnExpireLine(XLine *line);
607 /** Called before the module is unloaded to clean up extensibles.
608 * This method is called once for every channel, membership, and user.
609 * so that you can clear up any data relating to the specified extensible.
610 * @param type The type of extensible being cleaned up. If this is EXT_CHANNEL
611 * then item is a Channel*, EXT_MEMBERSHIP then item is a Membership*,
612 * and EXT_USER then item is a User*.
613 * @param item A pointer to the extensible which is being cleaned up.
615 virtual void OnCleanup(ExtensionItem::ExtensibleType type, Extensible* item);
617 /** Called after any nickchange, local or remote. This can be used to track users after nickchanges
618 * have been applied. Please note that although you can see remote nickchanges through this function, you should
619 * NOT make any changes to the User if the user is a remote user as this may cause a desnyc.
620 * check user->server before taking any action (including returning nonzero from the method).
621 * Because this method is called after the nickchange is taken place, no return values are possible
622 * to indicate forbidding of the nick change. Use OnUserPreNick for this.
623 * @param user The user changing their nick
624 * @param oldnick The old nickname of the user before the nickchange
626 virtual void OnUserPostNick(User* user, const std::string &oldnick);
628 /** Called before a mode change via the MODE command, to allow a single access check for
629 * a full mode change (use OnRawMode to check individual modes)
631 * Returning MOD_RES_ALLOW will skip prefix level checks, but can be overridden by
632 * OnRawMode for each individual mode
634 * @param source the user making the mode change
635 * @param dest the user destination of the umode change (NULL if a channel mode)
636 * @param channel the channel destination of the mode change
637 * @param modes Modes being changed, can be edited
639 virtual ModResult OnPreMode(User* source, User* dest, Channel* channel, Modes::ChangeList& modes);
641 /** Called when a 005 numeric is about to be output.
642 * The module should modify the 005 numeric if needed to indicate its features.
643 * @param tokens The 005 map to be modified if neccessary.
645 virtual void On005Numeric(std::map<std::string, std::string>& tokens);
647 /** Called when a client is disconnected by KILL.
648 * If a client is killed by a server, e.g. a nickname collision or protocol error,
650 * Return 1 from this function to prevent the kill, and 0 from this function to allow
651 * it as normal. If you prevent the kill no output will be sent to the client, it is
652 * down to your module to generate this information.
653 * NOTE: It is NOT advisable to stop kills which originate from servers or remote users.
654 * If you do so youre risking race conditions, desyncs and worse!
655 * @param source The user sending the KILL
656 * @param dest The user being killed
657 * @param reason The kill reason
658 * @return 1 to prevent the kill, 0 to allow
660 virtual ModResult OnKill(User* source, User* dest, const std::string &reason);
662 /** Called whenever a module is loaded.
663 * mod will contain a pointer to the module, and string will contain its name,
664 * for example m_widgets.so. This function is primary for dependency checking,
665 * your module may decide to enable some extra features if it sees that you have
666 * for example loaded "m_killwidgets.so" with "m_makewidgets.so". It is highly
667 * recommended that modules do *NOT* bail if they cannot satisfy dependencies,
668 * but instead operate under reduced functionality, unless the dependency is
669 * absolutely neccessary (e.g. a module that extends the features of another
671 * @param mod A pointer to the new module
673 virtual void OnLoadModule(Module* mod);
675 /** Called whenever a module is unloaded.
676 * mod will contain a pointer to the module, and string will contain its name,
677 * for example m_widgets.so. This function is primary for dependency checking,
678 * your module may decide to enable some extra features if it sees that you have
679 * for example loaded "m_killwidgets.so" with "m_makewidgets.so". It is highly
680 * recommended that modules do *NOT* bail if they cannot satisfy dependencies,
681 * but instead operate under reduced functionality, unless the dependency is
682 * absolutely neccessary (e.g. a module that extends the features of another
684 * @param mod Pointer to the module being unloaded (still valid)
686 virtual void OnUnloadModule(Module* mod);
688 /** Called once every five seconds for background processing.
689 * This timer can be used to control timed features. Its period is not accurate
690 * enough to be used as a clock, but it is gauranteed to be called at least once in
691 * any five second period, directly from the main loop of the server.
692 * @param curtime The current timer derived from time(2)
694 virtual void OnBackgroundTimer(time_t curtime);
696 /** Called whenever any command is about to be executed.
697 * This event occurs for all registered commands, wether they are registered in the core,
698 * or another module, and for invalid commands. Invalid commands may only be sent to this
699 * function when the value of validated is false. By returning 1 from this method you may prevent the
700 * command being executed. If you do this, no output is created by the core, and it is
701 * down to your module to produce any output neccessary.
702 * Note that unless you return 1, you should not destroy any structures (e.g. by using
703 * InspIRCd::QuitUser) otherwise when the command's handler function executes after your
704 * method returns, it will be passed an invalid pointer to the user object and crash!)
705 * @param command The command being executed
706 * @param parameters An array of array of characters containing the parameters for the command
707 * @param user the user issuing the command
708 * @param validated True if the command has passed all checks, e.g. it is recognised, has enough parameters, the user has permission to execute it, etc.
709 * You should only change the parameter list and command string if validated == false (e.g. before the command lookup occurs).
710 * @return 1 to block the command, 0 to allow
712 virtual ModResult OnPreCommand(std::string& command, CommandBase::Params& parameters, LocalUser* user, bool validated);
714 /** Called after any command has been executed.
715 * This event occurs for all registered commands, wether they are registered in the core,
716 * or another module, but it will not occur for invalid commands (e.g. ones which do not
717 * exist within the command table). The result code returned by the command handler is
719 * @param command The command being executed
720 * @param parameters An array of array of characters containing the parameters for the command
721 * @param user the user issuing the command
722 * @param result The return code given by the command handler, one of CMD_SUCCESS or CMD_FAILURE
723 * @param loop Whether the command is being called from LoopCall or directly.
725 virtual void OnPostCommand(Command* command, const CommandBase::Params& parameters, LocalUser* user, CmdResult result, bool loop);
727 /** Called when a command was blocked before it could be executed.
728 * @param command The command being executed.
729 * @param parameters The parameters for the command.
730 * @param user The user issuing the command.
732 virtual void OnCommandBlocked(const std::string& command, const CommandBase::Params& parameters, LocalUser* user);
734 /** Called after a user object is initialised and added to the user list.
735 * When this is called the user has not had their I/O hooks checked or had their initial
736 * connect class assigned and may not yet have a serialiser. You probably want to use
737 * the OnUserPostInit or OnUserSetIP hooks instead of this one.
738 * @param user The connecting user.
740 virtual void OnUserInit(LocalUser* user);
742 /** Called after a user object has had their I/O hooks checked, their initial connection
743 * class assigned, and had a serialiser set.
744 * @param user The connecting user.
746 virtual void OnUserPostInit(LocalUser* user);
748 /** Called to check if a user who is connecting can now be allowed to register
749 * If any modules return false for this function, the user is held in the waiting
750 * state until all modules return true. For example a module which implements ident
751 * lookups will continue to return false for a user until their ident lookup is completed.
752 * Note that the registration timeout for a user overrides these checks, if the registration
753 * timeout is reached, the user is disconnected even if modules report that the user is
754 * not ready to connect.
755 * @param user The user to check
756 * @return true to indicate readiness, false if otherwise
758 virtual ModResult OnCheckReady(LocalUser* user);
760 /** Called whenever a user is about to register their connection (e.g. before the user
761 * is sent the MOTD etc). Modules can use this method if they are performing a function
762 * which must be done before the actual connection is completed (e.g. ident lookups,
763 * dnsbl lookups, etc).
764 * Note that you should NOT delete the user record here by causing a disconnection!
765 * Use OnUserConnect for that instead.
766 * @param user The user registering
767 * @return 1 to indicate user quit, 0 to continue
769 virtual ModResult OnUserRegister(LocalUser* user);
771 /** Called whenever a user joins a channel, to determine if invite checks should go ahead or not.
772 * This method will always be called for each join, wether or not the channel is actually +i, and
773 * determines the outcome of an if statement around the whole section of invite checking code.
774 * return 1 to explicitly allow the join to go ahead or 0 to ignore the event.
775 * @param user The user joining the channel
776 * @param chan The channel being joined
777 * @return 1 to explicitly allow the join, 0 to proceed as normal
779 virtual ModResult OnCheckInvite(User* user, Channel* chan);
781 /** Called whenever a mode character is processed.
782 * Return 1 from this function to block the mode character from being processed entirely.
783 * @param user The user who is sending the mode
784 * @param chan The channel the mode is being sent to (or NULL if a usermode)
785 * @param mh The mode handler for the mode being changed
786 * @param param The parameter for the mode or an empty string
787 * @param adding true of the mode is being added, false if it is being removed
788 * @return ACR_DENY to deny the mode, ACR_DEFAULT to do standard mode checking, and ACR_ALLOW
789 * to skip all permission checking. Please note that for remote mode changes, your return value
792 virtual ModResult OnRawMode(User* user, Channel* chan, ModeHandler* mh, const std::string& param, bool adding);
794 /** Called whenever a user joins a channel, to determine if key checks should go ahead or not.
795 * This method will always be called for each join, wether or not the channel is actually +k, and
796 * determines the outcome of an if statement around the whole section of key checking code.
797 * if the user specified no key, the keygiven string will be a valid but empty value.
798 * return 1 to explicitly allow the join to go ahead or 0 to ignore the event.
799 * @param user The user joining the channel
800 * @param chan The channel being joined
801 * @param keygiven The key given on joining the channel.
802 * @return 1 to explicitly allow the join, 0 to proceed as normal
804 virtual ModResult OnCheckKey(User* user, Channel* chan, const std::string &keygiven);
806 /** Called whenever a user joins a channel, to determine if channel limit checks should go ahead or not.
807 * This method will always be called for each join, wether or not the channel is actually +l, and
808 * determines the outcome of an if statement around the whole section of channel limit checking code.
809 * return 1 to explicitly allow the join to go ahead or 0 to ignore the event.
810 * @param user The user joining the channel
811 * @param chan The channel being joined
812 * @return 1 to explicitly allow the join, 0 to proceed as normal
814 virtual ModResult OnCheckLimit(User* user, Channel* chan);
817 * Checks for a user's ban from the channel
818 * @param user The user to check
819 * @param chan The channel to check in
820 * @return MOD_RES_DENY to mark as banned, MOD_RES_ALLOW to skip the
821 * ban check, or MOD_RES_PASSTHRU to check bans normally
823 virtual ModResult OnCheckChannelBan(User* user, Channel* chan);
826 * Checks for a user's match of a single ban
827 * @param user The user to check for match
828 * @param chan The channel on which the match is being checked
829 * @param mask The mask being checked
830 * @return MOD_RES_DENY to mark as banned, MOD_RES_ALLOW to skip the
831 * ban check, or MOD_RES_PASSTHRU to check bans normally
833 virtual ModResult OnCheckBan(User* user, Channel* chan, const std::string& mask);
835 /** Checks for a match on a given extban type
836 * @return MOD_RES_DENY to mark as banned, MOD_RES_ALLOW to skip the
837 * ban check, or MOD_RES_PASSTHRU to check bans normally
839 virtual ModResult OnExtBanCheck(User* user, Channel* chan, char type);
841 /** Called whenever a change of a local users displayed host is attempted.
842 * Return 1 to deny the host change, or 0 to allow it.
843 * @param user The user whos host will be changed
844 * @param newhost The new hostname
845 * @return 1 to deny the host change, 0 to allow
847 virtual ModResult OnPreChangeHost(LocalUser* user, const std::string &newhost);
849 /** Called whenever a change of a local users real name is attempted.
850 * return MOD_RES_DENY to deny the name change, or MOD_RES_ALLOW to allow it.
851 * @param user The user whos real name will be changed
852 * @param newhost The new real name.
853 * @return MOD_RES_DENY to deny the real name change, MOD_RES_ALLOW to allow
855 virtual ModResult OnPreChangeRealName(LocalUser* user, const std::string &newhost);
857 /** Called before a topic is changed.
858 * Return 1 to deny the topic change, 0 to check details on the change, -1 to let it through with no checks
859 * As with other 'pre' events, you should only ever block a local event.
860 * @param user The user changing the topic
861 * @param chan The channels who's topic is being changed
862 * @param topic The actual topic text
863 * @return 1 to block the topic change, 0 to allow
865 virtual ModResult OnPreTopicChange(User* user, Channel* chan, const std::string &topic);
867 /** Called whenever a topic has been changed.
868 * To block topic changes you must use OnPreTopicChange instead.
869 * @param user The user changing the topic
870 * @param chan The channels who's topic is being changed
871 * @param topic The actual topic text
873 virtual void OnPostTopicChange(User* user, Channel* chan, const std::string &topic);
875 /** Called whenever a password check is to be made. Replaces the old OldOperCompare API.
876 * The password field (from the config file) is in 'password' and is to be compared against
877 * 'input'. This method allows for encryption of passwords (oper, connect:allow, die/restart, etc).
878 * You should return a nonzero value to override the normal comparison, or zero to pass it on.
879 * @param ex The object that's causing the authentication (User* for \<oper> \<connect:allow> etc, Server* for \<link>).
880 * @param password The password from the configuration file (the password="" value).
881 * @param input The password entered by the user or whoever.
882 * @param hashtype The hash value from the config
883 * @return 0 to do nothing (pass on to next module/default), 1 == password is OK, -1 == password is not OK
885 virtual ModResult OnPassCompare(Extensible* ex, const std::string &password, const std::string &input, const std::string& hashtype);
887 /** Called after a user has fully connected and all modules have executed OnUserConnect
888 * This event is informational only. You should not change any user information in this
889 * event. To do so, use the OnUserConnect method to change the state of local users.
890 * This is called for both local and remote users.
891 * @param user The user who is connecting
893 virtual void OnPostConnect(User* user);
895 /** Called when a port accepts a connection
896 * Return MOD_RES_ACCEPT if you have used the file descriptor.
897 * @param fd The file descriptor returned from accept()
898 * @param sock The socket connection for the new user
899 * @param client The client IP address and port
900 * @param server The server IP address and port
902 virtual ModResult OnAcceptConnection(int fd, ListenSocket* sock, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server);
904 /** Called at intervals for modules to garbage-collect any hashes etc.
905 * Certain data types such as hash_map 'leak' buckets, which must be
906 * tidied up and freed by copying into a new item every so often. This
907 * method is called when it is time to do that.
909 virtual void OnGarbageCollect();
911 /** Called when a user's connect class is being matched
912 * @return MOD_RES_ALLOW to force the class to match, MOD_RES_DENY to forbid it, or
913 * MOD_RES_PASSTHRU to allow normal matching (by host/port).
915 virtual ModResult OnSetConnectClass(LocalUser* user, ConnectClass* myclass);
917 virtual ModResult OnNumeric(User* user, const Numeric::Numeric& numeric);
919 /** Called whenever a local user's IP is set for the first time, or when a local user's IP changes due to
920 * a module like m_cgiirc changing it.
921 * @param user The user whose IP is being set
923 virtual void OnSetUserIP(LocalUser* user);
925 /** Called whenever a ServiceProvider is registered.
926 * @param service ServiceProvider being registered.
928 virtual void OnServiceAdd(ServiceProvider& service);
930 /** Called whenever a ServiceProvider is unregistered.
931 * @param service ServiceProvider being unregistered.
933 virtual void OnServiceDel(ServiceProvider& service);
935 /** Called whenever a message is about to be written to a user.
936 * @param user The user who is having a message sent to them.
937 * @param msg The message which is being written to the user.
938 * @return MOD_RES_ALLOW to explicitly allow the message to be sent, MOD_RES_DENY to explicitly
939 * deny the message from being sent, or MOD_RES_PASSTHRU to let another module handle the event.
941 virtual ModResult OnUserWrite(LocalUser* user, ClientProtocol::Message& msg);
943 /** Called when a user connection has been unexpectedly disconnected.
944 * @param user The user who has been unexpectedly disconnected.
945 * @param error The type of error which caused this connection failure.
946 * @return MOD_RES_ALLOW to explicitly retain the user as a zombie, MOD_RES_DENY to explicitly
947 * disconnect the user, or MOD_RES_PASSTHRU to let another module handle the event.
949 virtual ModResult OnConnectionFail(LocalUser* user, BufferedSocketError error);
951 /** Called before a server shuts down.
952 * @param reason The reason the server is shutting down.
953 * @param restart Whether the server is restarting.
955 virtual void OnShutdown(const std::string& reason);
958 /** ModuleManager takes care of all things module-related
961 class CoreExport ModuleManager : public fakederef<ModuleManager>
964 typedef std::vector<ServiceProvider*> ServiceList;
967 /** Holds a string describing the last module error to occur
969 std::string LastModuleError;
971 /** List of loaded modules and shared object/dll handles
972 * keyed by module name
974 std::map<std::string, Module*> Modules;
980 } prioritizationState;
982 /** Loads all core modules (core_*)
984 void LoadCoreModules(std::map<std::string, ServiceList>& servicemap);
986 /** Calls the Prioritize() method in all loaded modules
987 * @return True if all went well, false if a dependency loop was detected
989 bool PrioritizeHooks();
991 /** Unregister all user modes or all channel modes owned by a module
992 * @param mod Module whose modes to unregister
993 * @param modetype MODETYPE_USER to unregister user modes, MODETYPE_CHANNEL to unregister channel modes
995 void UnregisterModes(Module* mod, ModeType modetype);
998 typedef std::map<std::string, Module*> ModuleMap;
1000 /** Event handler hooks.
1001 * This needs to be public to be used by FOREACH_MOD and friends.
1003 Module::List EventHandlers[I_END];
1005 /** List of data services keyed by name */
1006 std::multimap<std::string, ServiceProvider*, irc::insensitive_swo> DataProviders;
1008 /** A list of ServiceProviders waiting to be registered.
1009 * Non-NULL when constructing a Module, NULL otherwise.
1010 * When non-NULL ServiceProviders add themselves to this list on creation and the core
1011 * automatically registers them (that is, call AddService()) after the Module is constructed,
1012 * and before Module::init() is called.
1013 * If a service is created after the construction of the Module (for example in init()) it
1014 * has to be registered manually.
1016 ServiceList* NewServices;
1018 /** Expands the name of a module by prepending "m_" and appending ".so".
1019 * No-op if the name already has the ".so" extension.
1020 * @param modname Module name to expand
1021 * @return Module name starting with "m_" and ending with ".so"
1023 static std::string ExpandModName(const std::string& modname);
1025 /** Simple, bog-standard, boring constructor.
1033 /** Change the priority of one event in a module.
1034 * Each module event has a list of modules which are attached to that event type.
1035 * If you wish to be called before or after other specific modules, you may use this
1036 * method (usually within void Module::Prioritize()) to set your events priority.
1037 * You may use this call in other methods too, however, this is not supported behaviour
1039 * @param mod The module to change the priority of
1040 * @param i The event to change the priority of
1041 * @param s The state you wish to use for this event. Use one of
1042 * PRIO_FIRST to set the event to be first called, PRIO_LAST to
1043 * set it to be the last called, or PRIO_BEFORE and PRIORITY_AFTER
1044 * to set it to be before or after one or more other modules.
1045 * @param which If PRIO_BEFORE or PRIORITY_AFTER is set in parameter 's',
1046 * then this contains a the module that your module must be placed before
1049 bool SetPriority(Module* mod, Implementation i, Priority s, Module* which = NULL);
1051 /** Change the priority of all events in a module.
1052 * @param mod The module to set the priority of
1053 * @param s The priority of all events in the module.
1054 * Note that with this method, it is not possible to effectively use
1055 * PRIO_BEFORE or PRIORITY_AFTER, you should use the more fine tuned
1056 * SetPriority method for this, where you may specify other modules to
1057 * be prioritized against.
1059 void SetPriority(Module* mod, Priority s);
1061 /** Attach an event to a module.
1062 * You may later detatch the event with ModuleManager::Detach().
1063 * If your module is unloaded, all events are automatically detatched.
1064 * @param i Event type to attach
1065 * @param mod Module to attach event to
1066 * @return True if the event was attached
1068 bool Attach(Implementation i, Module* mod);
1070 /** Detatch an event from a module.
1071 * This is not required when your module unloads, as the core will
1072 * automatically detatch your module from all events it is attached to.
1073 * @param i Event type to detach
1074 * @param mod Module to detach event from
1075 * @return True if the event was detached
1077 bool Detach(Implementation i, Module* mod);
1079 /** Attach an array of events to a module
1080 * @param i Event types (array) to attach
1081 * @param mod Module to attach events to
1082 * @param sz The size of the implementation array
1084 void Attach(Implementation* i, Module* mod, size_t sz);
1086 /** Detach all events from a module (used on unload)
1087 * @param mod Module to detach from
1089 void DetachAll(Module* mod);
1091 /** Attach all events to a module (used on module load)
1092 * @param mod Module to attach to all events
1094 void AttachAll(Module* mod);
1096 /** Returns text describing the last module error
1097 * @return The last error message to occur
1099 std::string& LastError();
1101 /** Load a given module file
1102 * @param filename The file to load
1103 * @param defer Defer module init (loading many modules)
1104 * @return True if the module was found and loaded
1106 bool Load(const std::string& filename, bool defer = false);
1108 /** Unload a given module file. Note that the module will not be
1109 * completely gone until the cull list has finished processing.
1111 * @return true on success; if false, LastError will give a reason
1113 bool Unload(Module* module);
1115 /** Called by the InspIRCd constructor to load all modules from the config file.
1119 void DoSafeUnload(Module*);
1121 /** Check if a module can be unloaded and if yes, prepare it for unload
1122 * @param mod Module to be unloaded
1123 * @return True if the module is unloadable, false otherwise.
1124 * If true the module must be unloaded in the current main loop iteration.
1126 bool CanUnload(Module* mod);
1128 /** Find a module by name, and return a Module* to it.
1129 * This is preferred over iterating the module lists yourself.
1130 * @param name The module name to look up
1131 * @return A pointer to the module, or NULL if the module cannot be found
1133 Module* Find(const std::string &name);
1135 /** Register a service provided by a module */
1136 void AddService(ServiceProvider&);
1138 /** Unregister a service provided by a module */
1139 void DelService(ServiceProvider&);
1141 /** Register all services in a given ServiceList
1142 * @param list The list containing the services to register
1144 void AddServices(const ServiceList& list);
1146 inline void AddServices(ServiceProvider** list, int count)
1148 for(int i=0; i < count; i++)
1149 AddService(*list[i]);
1152 /** Find a service by name.
1153 * If multiple modules provide a given service, the first one loaded will be chosen.
1155 ServiceProvider* FindService(ServiceType Type, const std::string& name);
1157 template<typename T> inline T* FindDataService(const std::string& name)
1159 return static_cast<T*>(FindService(SERVICE_DATA, name));
1162 /** Get a map of all loaded modules keyed by their name
1163 * @return A ModuleMap containing all loaded modules
1165 const ModuleMap& GetModules() const { return Modules; }
1167 /** Make a service referenceable by dynamic_references
1168 * @param name Name that will be used by dynamic_references to find the object
1169 * @param service Service to make referenceable by dynamic_references
1171 void AddReferent(const std::string& name, ServiceProvider* service);
1173 /** Make a service no longer referenceable by dynamic_references
1174 * @param service Service to make no longer referenceable by dynamic_references
1176 void DelReferent(ServiceProvider* service);