/* +------------------------------------+ * | Inspire Internet Relay Chat Daemon | * +------------------------------------+ * * InspIRCd: (C) 2002-2008 InspIRCd Development Team * See: http://www.inspircd.org/wiki/index.php/Credits * * This program is free but copyrighted software; see * the file COPYING for details. * * --------------------------------------------------- */ #ifndef __MODULES_H #define __MODULES_H #include "dynamic.h" #include "base.h" #include "ctables.h" #include "inspsocket.h" #include #include #include #include "timer.h" #include "mode.h" #include "dns.h" class XLine; /** Used with OnAccessCheck() method of modules */ enum AccessControlType { ACR_DEFAULT, // Do default action (act as if the module isnt even loaded) ACR_DENY, // deny the action ACR_ALLOW, // allow the action AC_KICK, // a user is being kicked AC_DEOP, // a user is being deopped AC_OP, // a user is being opped AC_VOICE, // a user is being voiced AC_DEVOICE, // a user is being devoiced AC_HALFOP, // a user is being halfopped AC_DEHALFOP, // a user is being dehalfopped AC_INVITE, // a user is being invited AC_GENERAL_MODE // a channel mode is being changed }; /** Used to define a set of behavior bits for a module */ enum ModuleFlags { VF_STATIC = 1, // module is static, cannot be /unloadmodule'd VF_VENDOR = 2, // module is a vendor module (came in the original tarball, not 3rd party) VF_SERVICEPROVIDER = 4, // module provides a service to other modules (can be a dependency) VF_COMMON = 8 // module needs to be common on all servers in a network to link }; /** Used with SendToMode() */ enum WriteModeFlags { WM_AND = 1, WM_OR = 2 }; /** Used to represent an event type, for user, channel or server */ enum TargetTypeFlags { TYPE_USER = 1, TYPE_CHANNEL, TYPE_SERVER, TYPE_OTHER }; /** Used to represent wether a message was PRIVMSG or NOTICE */ enum MessageType { MSG_PRIVMSG = 0, MSG_NOTICE = 1 }; /** If you change the module API, change this value. * If you have enabled ipv6, the sizes of structs is * different, and modules will be incompatible with * ipv4 servers, so this value will be ten times as * high on ipv6 servers. */ #define NATIVE_API_VERSION 12000 #ifdef IPV6 #define API_VERSION (NATIVE_API_VERSION * 10) #else #define API_VERSION (NATIVE_API_VERSION * 1) #endif class ServerConfig; /* Forward-delacare module for ModuleMessage etc */ class Module; class InspIRCd; /** Low level definition of a FileReader classes file cache area - * a text file seperated into lines. */ typedef std::deque file_cache; /** A set of strings. */ typedef file_cache string_list; /** Holds a list of 'published features' for modules. */ typedef std::map featurelist; /** Holds a list of modules which implement an interface */ typedef std::deque modulelist; /** Holds a list of all modules which implement interfaces, by interface name */ typedef std::map > interfacelist; /** * This #define allows us to call a method in all * loaded modules in a readable simple way, e.g.: * 'FOREACH_MOD(I_OnConnect,OnConnect(user));' */ #define FOREACH_MOD(y,x) do { \ EventHandlerIter safei; \ for (EventHandlerIter _i = ServerInstance->Modules->EventHandlers[y].begin(); _i != ServerInstance->Modules->EventHandlers[y].end(); ) \ { \ safei = _i; \ ++safei; \ try \ { \ (*_i)->x ; \ } \ catch (CoreException& modexcept) \ { \ ServerInstance->Logs->Log("MODULE",DEFAULT,"Exception caught: %s",modexcept.GetReason()); \ } \ _i = safei; \ } \ } while (0); /** * This #define allows us to call a method in all * loaded modules in a readable simple way and pass * an instance pointer to the macro. e.g.: * 'FOREACH_MOD_I(Instance, OnConnect, OnConnect(user));' */ #define FOREACH_MOD_I(z,y,x) do { \ EventHandlerIter safei; \ for (EventHandlerIter _i = z->Modules->EventHandlers[y].begin(); _i != z->Modules->EventHandlers[y].end(); ) \ { \ safei = _i; \ ++safei; \ try \ { \ (*_i)->x ; \ } \ catch (CoreException& modexcept) \ { \ z->Logs->Log("MODULE",DEFAULT,"Exception caught: %s",modexcept.GetReason()); \ } \ _i = safei; \ } \ } while (0); /** * This define is similar to the one above but returns a result in MOD_RESULT. * The first module to return a nonzero result is the value to be accepted, * and any modules after are ignored. */ #define FOREACH_RESULT(y,x) \ do { \ EventHandlerIter safei; \ MOD_RESULT = 0; \ for (EventHandlerIter _i = ServerInstance->Modules->EventHandlers[y].begin(); _i != ServerInstance->Modules->EventHandlers[y].end(); ) \ { \ safei = _i; \ ++safei; \ try \ { \ int res = (*_i)->x ; \ if (res != 0) { \ MOD_RESULT = res; \ break; \ } \ } \ catch (CoreException& modexcept) \ { \ ServerInstance->Logs->Log("MODULE",DEFAULT,"Exception caught: %s",modexcept.GetReason()); \ } \ _i = safei; \ } \ } while(0); /** * This define is similar to the one above but returns a result in MOD_RESULT. * The first module to return a nonzero result is the value to be accepted, * and any modules after are ignored. */ #define FOREACH_RESULT_I(z,y,x) \ do { \ EventHandlerIter safei; \ MOD_RESULT = 0; \ for (EventHandlerIter _i = z->Modules->EventHandlers[y].begin(); _i != z->Modules->EventHandlers[y].end(); ) \ { \ safei = _i; \ ++safei; \ try \ { \ int res = (*_i)->x ; \ if (res != 0) { \ MOD_RESULT = res; \ break; \ } \ } \ catch (CoreException& modexcept) \ { \ z->Logs->Log("MODULE",DEBUG,"Exception caught: %s",modexcept.GetReason()); \ } \ _i = safei; \ } \ } while (0); /** Represents a non-local user. * (in fact, any FD less than -1 does) */ #define FD_MAGIC_NUMBER -42 /* Useful macros */ /** Is a local user */ #define IS_LOCAL(x) ((x->GetFd() > -1)) /** Is a remote user */ #define IS_REMOTE(x) (x->GetFd() < 0) /** Is a module created user */ #define IS_MODULE_CREATED(x) (x->GetFd() == FD_MAGIC_NUMBER) /** Is an oper */ #define IS_OPER(x) (!x->oper.empty()) /** Is away */ #define IS_AWAY(x) (!x->awaymsg.empty()) /** Holds a module's Version information. * The four members (set by the constructor only) indicate details as to the version number * of a module. A class of type Version is returned by the GetVersion method of the Module class. * The flags and API values represent the module flags and API version of the module. * The API version of a module must match the API version of the core exactly for the module to * load successfully. */ class CoreExport Version : public classbase { public: /** Version information. */ std::string version; /** Flags and API version */ const int Flags, API; /** Initialize version class */ Version(const std::string &sversion, int flags, int api_ver); }; /** The ModuleMessage class is the base class of Request and Event * This class is used to represent a basic data structure which is passed * between modules for safe inter-module communications. */ class CoreExport ModuleMessage : public Extensible { public: /** Destructor */ virtual ~ModuleMessage() {}; }; /** The Request class is a unicast message directed at a given module. * When this class is properly instantiated it may be sent to a module * using the Send() method, which will call the given module's OnRequest * method with this class as its parameter. */ class CoreExport Request : public ModuleMessage { protected: /** This member holds a pointer to arbitary data set by the emitter of the message */ char* data; /** This should be a null-terminated string identifying the type of request, * all modules should define this and use it to determine the nature of the * request before they attempt to cast the Request in any way. */ const char* id; /** This is a pointer to the sender of the message, which can be used to * directly trigger events, or to create a reply. */ Module* source; /** The single destination of the Request */ Module* dest; public: /** Create a new Request * This is for the 'old' way of casting whatever the data is * to char* and hoping you get the right thing at the other end. * This is slowly being depreciated in favor of the 'new' way. */ Request(char* anydata, Module* src, Module* dst); /** Create a new Request * This is for the 'new' way of defining a subclass * of Request and defining it in a common header, * passing an object of your Request subclass through * as a Request* and using the ID string to determine * what to cast it back to and the other end. This is * much safer as there are no casts not confirmed by * the ID string, and all casts are child->parent and * can be checked at runtime with dynamic_cast<>() */ Request(Module* src, Module* dst, const char* idstr); /** Fetch the Request data */ char* GetData(); /** Fetch the ID string */ const char* GetId(); /** Fetch the request source */ Module* GetSource(); /** Fetch the request destination (should be 'this' in the receiving module) */ Module* GetDest(); /** Send the Request. * Upon returning the result will be arbitary data returned by the module you * sent the request to. It is up to your module to know what this data is and * how to deal with it. */ const char* Send(); }; /** The Event class is a unicast message directed at all modules. * When the class is properly instantiated it may be sent to all modules * using the Send() method, which will trigger the OnEvent method in * all modules passing the object as its parameter. */ class CoreExport Event : public ModuleMessage { protected: /** This member holds a pointer to arbitary data set by the emitter of the message */ char* data; /** This is a pointer to the sender of the message, which can be used to * directly trigger events, or to create a reply. */ Module* source; /** The event identifier. * This is arbitary text which should be used to distinguish * one type of event from another. */ std::string id; public: /** Create a new Event */ Event(char* anydata, Module* src, const std::string &eventid); /** Get the Event data */ char* GetData(); /** Get the event Source */ Module* GetSource(); /** Get the event ID. * Use this to determine the event type for safe casting of the data */ std::string GetEventID(); /** Send the Event. * The return result of an Event::Send() will always be NULL as * no replies are expected. */ char* Send(InspIRCd* ServerInstance); }; /** Priority types which can be returned from Module::Prioritize() */ enum Priority { PRIORITY_FIRST, PRIORITY_DONTCARE, PRIORITY_LAST, PRIORITY_BEFORE, PRIORITY_AFTER }; /** Implementation-specific flags which may be set in Module::Implements() */ enum Implementation { I_BEGIN, I_OnUserConnect, I_OnUserQuit, I_OnUserDisconnect, I_OnUserJoin, I_OnUserPart, I_OnRehash, I_OnServerRaw, I_OnSendSnotice, I_OnUserPreJoin, I_OnUserPreKick, I_OnUserKick, I_OnOper, I_OnInfo, I_OnWhois, I_OnUserPreInvite, I_OnUserInvite, I_OnUserPreMessage, I_OnUserPreNotice, I_OnUserPreNick, I_OnUserMessage, I_OnUserNotice, I_OnMode, I_OnGetServerDescription, I_OnSyncUser, I_OnSyncChannel, I_OnSyncChannelMetaData, I_OnSyncUserMetaData, I_OnDecodeMetaData, I_ProtoSendMode, I_ProtoSendMetaData, I_OnWallops, I_OnChangeHost, I_OnChangeName, I_OnAddLine, I_OnDelLine, I_OnExpireLine, I_OnCleanup, I_OnUserPostNick, I_OnAccessCheck, I_On005Numeric, I_OnKill, I_OnRemoteKill, I_OnLoadModule, I_OnUnloadModule, I_OnBackgroundTimer, I_OnPreCommand, I_OnCheckReady, I_OnCheckInvite, I_OnRawMode, I_OnCheckKey, I_OnCheckLimit, I_OnCheckBan, I_OnCheckExtBan, I_OnCheckStringExtBan, I_OnStats, I_OnChangeLocalUserHost, I_OnChangeLocalUserGecos, I_OnLocalTopicChange, I_OnPostLocalTopicChange, I_OnEvent, I_OnRequest, I_OnGlobalOper, I_OnPostConnect, I_OnAddBan, I_OnDelBan, I_OnRawSocketAccept, I_OnRawSocketClose, I_OnRawSocketWrite, I_OnRawSocketRead, I_OnChangeLocalUserGECOS, I_OnUserRegister, I_OnChannelPreDelete, I_OnChannelDelete, I_OnPostOper, I_OnSyncOtherMetaData, I_OnSetAway, I_OnUserList, I_OnPostCommand, I_OnPostJoin, I_OnWhoisLine, I_OnBuildExemptList, I_OnRawSocketConnect, I_OnGarbageCollect, I_OnBufferFlushed, I_OnText, I_OnPassCompare, I_OnRunTestSuite, I_OnNamesListItem, I_OnNumeric, I_OnHookUserIO, I_OnHostCycle, I_END }; class ConfigReader; /** Base class for all InspIRCd modules * This class is the base class for InspIRCd modules. All modules must inherit from this class, * its methods will be called when irc server events occur. class inherited from module must be * instantiated by the ModuleFactory class (see relevent section) for the module to be initialised. */ class CoreExport Module : public Extensible { protected: /** Creator/owner pointer */ InspIRCd* ServerInstance; public: /** Default constructor. * Creates a module class. * @param Me An instance of the InspIRCd class which will be saved into ServerInstance for your use * \exception ModuleException Throwing this class, or any class derived from ModuleException, causes loading of the module to abort. */ Module(InspIRCd* Me); /** Default destructor. * destroys a module class */ virtual ~Module(); virtual void Prioritize() { } /** Returns the version number of a Module. * The method should return a Version object with its version information assigned via * Version::Version */ virtual Version GetVersion(); /** Called when a user connects. * The details of the connecting user are available to you in the parameter User *user * @param user The user who is connecting */ virtual void OnUserConnect(User* user); /** Called when a user quits. * The details of the exiting user are available to you in the parameter User *user * This event is only called when the user is fully registered when they quit. To catch * raw disconnections, use the OnUserDisconnect method. * @param user The user who is quitting * @param message The user's quit message (as seen by non-opers) * @param oper_message The user's quit message (as seen by opers) */ virtual void OnUserQuit(User* user, const std::string &message, const std::string &oper_message); /** Called whenever a user's socket is closed. * The details of the exiting user are available to you in the parameter User *user * This event is called for all users, registered or not, as a cleanup method for modules * which might assign resources to user, such as dns lookups, objects and sockets. * @param user The user who is disconnecting */ virtual void OnUserDisconnect(User* user); /** Called whenever a channel is about to be deleted * @param chan The channel being deleted * @return An integer specifying whether or not the channel may be deleted. 0 for yes, 1 for no. */ virtual int OnChannelPreDelete(Channel *chan); /** Called whenever a channel is deleted, either by QUIT, KICK or PART. * @param chan The channel being deleted */ virtual void OnChannelDelete(Channel* chan); /** Called when a user joins a channel. * The details of the joining user are available to you in the parameter User *user, * and the details of the channel they have joined is available in the variable Channel *channel * @param user The user who is joining * @param channel The channel being joined * @param silent Change this to true if you want to conceal the JOIN command from the other users * of the channel (useful for modules such as auditorium) * @param sync This is set to true if the JOIN is the result of a network sync and the remote user is being introduced * to a channel due to the network sync. */ virtual void OnUserJoin(User* user, Channel* channel, bool sync, bool &silent); /** Called after a user joins a channel * Identical to OnUserJoin, but called immediately afterwards, when any linking module has * seen the join. * @param user The user who is joining * @param channel The channel being joined */ virtual void OnPostJoin(User* user, Channel* channel); /** Called when a user parts a channel. * The details of the leaving user are available to you in the parameter User *user, * and the details of the channel they have left is available in the variable Channel *channel * @param user The user who is parting * @param channel The channel being parted * @param partmessage The part message, or an empty string (may be modified) * @param silent Change this to true if you want to conceal the PART command from the other users * of the channel (useful for modules such as auditorium) */ virtual void OnUserPart(User* user, Channel* channel, std::string &partmessage, bool &silent); /** Called on rehash. * This method is called prior to a /REHASH or when a SIGHUP is received from the operating * system. You should use it to reload any files so that your module keeps in step with the * rest of the application. If a parameter is given, the core has done nothing. The module * receiving the event can decide if this parameter has any relevence to it. * @param user The user performing the rehash, if any -- if this is server initiated, the * value of this variable will be NULL. * @param parameter The (optional) parameter given to REHASH from the user. */ virtual void OnRehash(User* user, const std::string ¶meter); /** Called when a raw command is transmitted or received. * This method is the lowest level of handler available to a module. It will be called with raw * data which is passing through a connected socket. If you wish, you may munge this data by changing * the string parameter "raw". If you do this, after your function exits it will immediately be * cut down to 510 characters plus a carriage return and linefeed. For INBOUND messages only (where * inbound is set to true) the value of user will be the User of the connection sending the * data. This is not possible for outbound data because the data may be being routed to multiple targets. * @param raw The raw string in RFC1459 format * @param inbound A flag to indicate wether the data is coming into the daemon or going out to the user * @param user The user record sending the text, when inbound == true. */ virtual void OnServerRaw(std::string &raw, bool inbound, User* user); /** Called whenever a snotice is about to be sent to a snomask. * snomask and type may both be modified; the message may not. * @param snomask The snomask the message is going to (e.g. 'A') * @param type The textual description the snomask will go to (e.g. 'OPER') * @param message The text message to be sent via snotice * @return 1 to block the snotice from being sent entirely, 0 else. */ virtual int OnSendSnotice(char &snomask, std::string &type, const std::string &message); /** Called whenever a user is about to join a channel, before any processing is done. * Returning a value of 1 from this function stops the process immediately, causing no * output to be sent to the user by the core. If you do this you must produce your own numerics, * notices etc. This is useful for modules which may want to mimic +b, +k, +l etc. Returning -1 from * this function forces the join to be allowed, bypassing restrictions such as banlists, invite, keys etc. * * IMPORTANT NOTE! * * If the user joins a NEW channel which does not exist yet, OnUserPreJoin will be called BEFORE the channel * record is created. This will cause Channel* chan to be NULL. There is very little you can do in form of * processing on the actual channel record at this point, however the channel NAME will still be passed in * char* cname, so that you could for example implement a channel blacklist or whitelist, etc. * @param user The user joining the channel * @param chan If the channel is a new channel, this will be NULL, otherwise it will be a pointer to the channel being joined * @param cname The channel name being joined. For new channels this is valid where chan is not. * @param privs A string containing the users privilages when joining the channel. For new channels this will contain "@". * You may alter this string to alter the user's modes on the channel. * @param keygiven The key given to join the channel, or an empty string if none was provided * @return 1 To prevent the join, 0 to allow it. */ virtual int OnUserPreJoin(User* user, Channel* chan, const char* cname, std::string &privs, const std::string &keygiven); /** Called whenever a user is about to be kicked. * Returning a value of 1 from this function stops the process immediately, causing no * output to be sent to the user by the core. If you do this you must produce your own numerics, * notices etc. * @param source The user issuing the kick * @param user The user being kicked * @param chan The channel the user is being kicked from * @param reason The kick reason * @return 1 to prevent the kick, 0 to continue normally, -1 to explicitly allow the kick regardless of normal operation */ virtual int OnUserPreKick(User* source, User* user, Channel* chan, const std::string &reason); /** Called whenever a user is kicked. * If this method is called, the kick is already underway and cannot be prevented, so * to prevent a kick, please use Module::OnUserPreKick instead of this method. * @param source The user issuing the kick * @param user The user being kicked * @param chan The channel the user is being kicked from * @param reason The kick reason * @param silent Change this to true if you want to conceal the PART command from the other users * of the channel (useful for modules such as auditorium) */ virtual void OnUserKick(User* source, User* user, Channel* chan, const std::string &reason, bool &silent); /** Called whenever a user opers locally. * The User will contain the oper mode 'o' as this function is called after any modifications * are made to the user's structure by the core. * @param user The user who is opering up * @param opertype The opers type name */ virtual void OnOper(User* user, const std::string &opertype); /** Called after a user opers locally. * This is identical to Module::OnOper(), except it is called after OnOper so that other modules * can be gauranteed to already have processed the oper-up, for example m_spanningtree has sent * out the OPERTYPE, etc. * @param user The user who is opering up * @param opername The name of the oper that the user is opering up to. Only valid locally. Empty string otherwise. * @param opertype The opers type name */ virtual void OnPostOper(User* user, const std::string &opername, const std::string &opertype); /** Called whenever a user types /INFO. * The User will contain the information of the user who typed the command. Modules may use this * method to output their own credits in /INFO (which is the ircd's version of an about box). * It is purposefully not possible to modify any info that has already been output, or halt the list. * You must write a 371 numeric to the user, containing your info in the following format: * * <nick> :information here * * @param user The user issuing /INFO */ virtual void OnInfo(User* user); /** Called whenever a /WHOIS is performed on a local user. * The source parameter contains the details of the user who issued the WHOIS command, and * the dest parameter contains the information of the user they are whoising. * @param source The user issuing the WHOIS command * @param dest The user who is being WHOISed */ virtual void OnWhois(User* source, User* dest); /** Called whenever a user is about to invite another user into a channel, before any processing is done. * Returning 1 from this function stops the process immediately, causing no * output to be sent to the user by the core. If you do this you must produce your own numerics, * notices etc. This is useful for modules which may want to filter invites to channels. * @param source The user who is issuing the INVITE * @param dest The user being invited * @param channel The channel the user is being invited to * @param timeout The time the invite will expire (0 == never) * @return 1 to deny the invite, 0 to check whether or not the user has permission to invite, -1 to explicitly allow the invite */ virtual int OnUserPreInvite(User* source,User* dest,Channel* channel, time_t timeout); /** Called after a user has been successfully invited to a channel. * You cannot prevent the invite from occuring using this function, to do that, * use OnUserPreInvite instead. * @param source The user who is issuing the INVITE * @param dest The user being invited * @param channel The channel the user is being invited to * @param timeout The time the invite will expire (0 == never) */ virtual void OnUserInvite(User* source,User* dest,Channel* channel, time_t timeout); /** Called whenever a user is about to PRIVMSG A user or a channel, before any processing is done. * Returning any nonzero value from this function stops the process immediately, causing no * output to be sent to the user by the core. If you do this you must produce your own numerics, * notices etc. This is useful for modules which may want to filter or redirect messages. * target_type can be one of TYPE_USER or TYPE_CHANNEL. If the target_type value is a user, * you must cast dest to a User* otherwise you must cast it to a Channel*, this is the details * of where the message is destined to be sent. * @param user The user sending the message * @param dest The target of the message (Channel* or User*) * @param target_type The type of target (TYPE_USER or TYPE_CHANNEL) * @param text Changeable text being sent by the user * @param status The status being used, e.g. PRIVMSG @#chan has status== '@', 0 to send to everyone. * @param exempt_list A list of users not to send to. For channel messages, this will usually contain just the sender. * It will be ignored for private messages. * @return 1 to deny the NOTICE, 0 to allow it */ virtual int OnUserPreMessage(User* user,void* dest,int target_type, std::string &text,char status, CUList &exempt_list); /** Called whenever a user is about to NOTICE A user or a channel, before any processing is done. * Returning any nonzero value from this function stops the process immediately, causing no * output to be sent to the user by the core. If you do this you must produce your own numerics, * notices etc. This is useful for modules which may want to filter or redirect messages. * target_type can be one of TYPE_USER or TYPE_CHANNEL. If the target_type value is a user, * you must cast dest to a User* otherwise you must cast it to a Channel*, this is the details * of where the message is destined to be sent. * You may alter the message text as you wish before relinquishing control to the next module * in the chain, and if no other modules block the text this altered form of the text will be sent out * to the user and possibly to other servers. * @param user The user sending the message * @param dest The target of the message (Channel* or User*) * @param target_type The type of target (TYPE_USER or TYPE_CHANNEL) * @param text Changeable text being sent by the user * @param status The status being used, e.g. PRIVMSG @#chan has status== '@', 0 to send to everyone. * @param exempt_list A list of users not to send to. For channel notices, this will usually contain just the sender. * It will be ignored for private notices. * @return 1 to deny the NOTICE, 0 to allow it */ virtual int OnUserPreNotice(User* user,void* dest,int target_type, std::string &text,char status, CUList &exempt_list); /** Called whenever the server wants to build the exemption list for a channel, but is not directly doing a PRIVMSG or NOTICE. * For example, the spanningtree protocol will call this event when passing a privmsg on (but not processing it directly). * @param message_type The message type, either MSG_PRIVMSG or MSG_NOTICE * @param chan The channel to build the exempt list of * @param sender The original sender of the PRIVMSG or NOTICE * @param status The status char to be used for the channel list * @param exempt_list The exempt list to be populated * @param text The original message text causing the exempt list to be built */ virtual void OnBuildExemptList(MessageType message_type, Channel* chan, User* sender, char status, CUList &exempt_list, const std::string &text); /** Called before any nickchange, local or remote. This can be used to implement Q-lines etc. * Please note that although you can see remote nickchanges through this function, you should * NOT make any changes to the User if the user is a remote user as this may cause a desnyc. * check user->server before taking any action (including returning nonzero from the method). * If your method returns nonzero, the nickchange is silently forbidden, and it is down to your * module to generate some meaninful output. * @param user The username changing their nick * @param newnick Their new nickname * @return 1 to deny the change, 0 to allow */ virtual int OnUserPreNick(User* user, const std::string &newnick); /** Called after any PRIVMSG sent from a user. * The dest variable contains a User* if target_type is TYPE_USER and a Channel* * if target_type is TYPE_CHANNEL. * @param user The user sending the message * @param dest The target of the message * @param target_type The type of target (TYPE_USER or TYPE_CHANNEL) * @param text the text being sent by the user * @param status The status being used, e.g. PRIVMSG @#chan has status== '@', 0 to send to everyone. */ virtual void OnUserMessage(User* user, void* dest, int target_type, const std::string &text, char status, const CUList &exempt_list); /** Called after any NOTICE sent from a user. * The dest variable contains a User* if target_type is TYPE_USER and a Channel* * if target_type is TYPE_CHANNEL. * @param user The user sending the message * @param dest The target of the message * @param target_type The type of target (TYPE_USER or TYPE_CHANNEL) * @param text the text being sent by the user * @param status The status being used, e.g. NOTICE @#chan has status== '@', 0 to send to everyone. */ virtual void OnUserNotice(User* user, void* dest, int target_type, const std::string &text, char status, const CUList &exempt_list); /** Called immediately before any NOTICE or PRIVMSG sent from a user, local or remote. * The dest variable contains a User* if target_type is TYPE_USER and a Channel* * if target_type is TYPE_CHANNEL. * The difference between this event and OnUserPreNotice/OnUserPreMessage is that delivery is gauranteed, * the message has already been vetted. In the case of the other two methods, a later module may stop your * message. This also differs from OnUserMessage which occurs AFTER the message has been sent. * @param user The user sending the message * @param dest The target of the message * @param target_type The type of target (TYPE_USER or TYPE_CHANNEL) * @param text the text being sent by the user * @param status The status being used, e.g. NOTICE @#chan has status== '@', 0 to send to everyone. */ virtual void OnText(User* user, void* dest, int target_type, const std::string &text, char status, CUList &exempt_list); /** Called after every MODE command sent from a user * The dest variable contains a User* if target_type is TYPE_USER and a Channel* * if target_type is TYPE_CHANNEL. The text variable contains the remainder of the * mode string after the target, e.g. "+wsi" or "+ooo nick1 nick2 nick3". * @param user The user sending the MODEs * @param dest The target of the modes (User* or Channel*) * @param target_type The type of target (TYPE_USER or TYPE_CHANNEL) * @param text The actual modes and their parameters if any */ virtual void OnMode(User* user, void* dest, int target_type, const std::string &text); /** Allows modules to alter or create server descriptions * Whenever a module requires a server description, for example for display in * WHOIS, this function is called in all modules. You may change or define the * description given in std::string &description. If you do, this description * will be shown in the WHOIS fields. * @param servername The servername being searched for * @param description Alterable server description for this server */ virtual void OnGetServerDescription(const std::string &servername,std::string &description); /** Allows modules to synchronize data which relates to users during a netburst. * When this function is called, it will be called from the module which implements * the linking protocol. This currently is m_spanningtree.so. A pointer to this module * is given in Module* proto, so that you may call its methods such as ProtoSendMode * (see below). This function will be called for every user visible on your side * of the burst, allowing you to for example set modes, etc. Do not use this call to * synchronize data which you have stored using class Extensible -- There is a specialist * function OnSyncUserMetaData and OnSyncChannelMetaData for this! * @param user The user being syncronized * @param proto A pointer to the module handling network protocol * @param opaque An opaque pointer set by the protocol module, should not be modified! */ virtual void OnSyncUser(User* user, Module* proto, void* opaque); /** Allows modules to synchronize data which relates to channels during a netburst. * When this function is called, it will be called from the module which implements * the linking protocol. This currently is m_spanningtree.so. A pointer to this module * is given in Module* proto, so that you may call its methods such as ProtoSendMode * (see below). This function will be called for every user visible on your side * of the burst, allowing you to for example set modes, etc. Do not use this call to * synchronize data which you have stored using class Extensible -- There is a specialist * function OnSyncUserMetaData and OnSyncChannelMetaData for this! * * For a good example of how to use this function, please see src/modules/m_chanprotect.cpp * * @param chan The channel being syncronized * @param proto A pointer to the module handling network protocol * @param opaque An opaque pointer set by the protocol module, should not be modified! */ virtual void OnSyncChannel(Channel* chan, Module* proto, void* opaque); /* Allows modules to syncronize metadata related to channels over the network during a netburst. * Whenever the linking module wants to send out data, but doesnt know what the data * represents (e.g. it is Extensible metadata, added to a User or Channel by a module) then * this method is called.You should use the ProtoSendMetaData function after you've * correctly decided how the data should be represented, to send the metadata on its way if it belongs * to your module. For a good example of how to use this method, see src/modules/m_swhois.cpp. * @param chan The channel whos metadata is being syncronized * @param proto A pointer to the module handling network protocol * @param opaque An opaque pointer set by the protocol module, should not be modified! * @param extname The extensions name which is being searched for * @param displayable If this value is true, the data is going to be displayed to a user, * and not sent across the network. Use this to determine wether or not to show sensitive data. */ virtual void OnSyncChannelMetaData(Channel* chan, Module* proto,void* opaque, const std::string &extname, bool displayable = false); /* Allows modules to syncronize metadata related to users over the network during a netburst. * Whenever the linking module wants to send out data, but doesnt know what the data * represents (e.g. it is Extensible metadata, added to a User or Channel by a module) then * this method is called. You should use the ProtoSendMetaData function after you've * correctly decided how the data should be represented, to send the metadata on its way if * if it belongs to your module. * @param user The user whos metadata is being syncronized * @param proto A pointer to the module handling network protocol * @param opaque An opaque pointer set by the protocol module, should not be modified! * @param extname The extensions name which is being searched for * @param displayable If this value is true, the data is going to be displayed to a user, * and not sent across the network. Use this to determine wether or not to show sensitive data. */ virtual void OnSyncUserMetaData(User* user, Module* proto,void* opaque, const std::string &extname, bool displayable = false); /* Allows modules to syncronize metadata not related to users or channels, over the network during a netburst. * Whenever the linking module wants to send out data, but doesnt know what the data * represents (e.g. it is Extensible metadata, added to a User or Channel by a module) then * this method is called. You should use the ProtoSendMetaData function after you've * correctly decided how the data should be represented, to send the metadata on its way if * if it belongs to your module. * @param proto A pointer to the module handling network protocol * @param opaque An opaque pointer set by the protocol module, should not be modified! * @param displayable If this value is true, the data is going to be displayed to a user, * and not sent across the network. Use this to determine wether or not to show sensitive data. */ virtual void OnSyncOtherMetaData(Module* proto, void* opaque, bool displayable = false); /** Allows module data, sent via ProtoSendMetaData, to be decoded again by a receiving module. * Please see src/modules/m_swhois.cpp for a working example of how to use this method call. * @param target_type The type of item to decode data for, TYPE_USER or TYPE_CHANNEL * @param target The Channel* or User* that data should be added to * @param extname The extension name which is being sent * @param extdata The extension data, encoded at the other end by an identical module through OnSyncChannelMetaData or OnSyncUserMetaData */ virtual void OnDecodeMetaData(int target_type, void* target, const std::string &extname, const std::string &extdata); /** Implemented by modules which provide the ability to link servers. * These modules will implement this method, which allows transparent sending of servermodes * down the network link as a broadcast, without a module calling it having to know the format * of the MODE command before the actual mode string. * * More documentation to follow soon. Please see src/modules/m_chanprotect.cpp for examples * of how to use this function. * * @param opaque An opaque pointer set by the protocol module, should not be modified! * @param target_type The type of item to decode data for, TYPE_USER or TYPE_CHANNEL * @param target The Channel* or User* that modes should be sent for * @param modeline The modes and parameters to be sent */ virtual void ProtoSendMode(void* opaque, TargetTypeFlags target_type, void* target, const std::string &modeline); /** Implemented by modules which provide the ability to link servers. * These modules will implement this method, which allows metadata (extra data added to * user and channel records using class Extensible, Extensible::Extend, etc) to be sent * to other servers on a netburst and decoded at the other end by the same module on a * different server. * * More documentation to follow soon. Please see src/modules/m_swhois.cpp for example of * how to use this function. * @param opaque An opaque pointer set by the protocol module, should not be modified! * @param target_type The type of item to decode data for, TYPE_USER or TYPE_CHANNEL * @param target The Channel* or User* that metadata should be sent for * @param extname The extension name to send metadata for * @param extdata Encoded data for this extension name, which will be encoded at the oppsite end by an identical module using OnDecodeMetaData */ virtual void ProtoSendMetaData(void* opaque, TargetTypeFlags target_type, void* target, const std::string &extname, const std::string &extdata); /** Called after every WALLOPS command. * @param user The user sending the WALLOPS * @param text The content of the WALLOPS message */ virtual void OnWallops(User* user, const std::string &text); /** Called whenever a user's hostname is changed. * This event triggers after the host has been set. * @param user The user whos host is being changed * @param newhost The new hostname being set */ virtual void OnChangeHost(User* user, const std::string &newhost); /** Called whenever a user's GECOS (realname) is changed. * This event triggers after the name has been set. * @param user The user who's GECOS is being changed * @param gecos The new GECOS being set on the user */ virtual void OnChangeName(User* user, const std::string &gecos); /** Called whenever an xline is added by a local user. * This method is triggered after the line is added. * @param source The sender of the line or NULL for local server * @param line The xline being added */ virtual void OnAddLine(User* source, XLine* line); /** Called whenever an xline is deleted MANUALLY. See OnExpireLine for expiry. * This method is triggered after the line is deleted. * @param source The user removing the line or NULL for local server * @param line the line being deleted */ virtual void OnDelLine(User* source, XLine* line); /** Called whenever an xline expires. * This method is triggered after the line is deleted. * @param line The line being deleted. */ virtual void OnExpireLine(XLine *line); /** Called before your module is unloaded to clean up Extensibles. * This method is called once for every user and channel on the network, * so that when your module unloads it may clear up any remaining data * in the form of Extensibles added using Extensible::Extend(). * If the target_type variable is TYPE_USER, then void* item refers to * a User*, otherwise it refers to a Channel*. * @param target_type The type of item being cleaned * @param item A pointer to the item's class */ virtual void OnCleanup(int target_type, void* item); /** Called after any nickchange, local or remote. This can be used to track users after nickchanges * have been applied. Please note that although you can see remote nickchanges through this function, you should * NOT make any changes to the User if the user is a remote user as this may cause a desnyc. * check user->server before taking any action (including returning nonzero from the method). * Because this method is called after the nickchange is taken place, no return values are possible * to indicate forbidding of the nick change. Use OnUserPreNick for this. * @param user The user changing their nick * @param oldnick The old nickname of the user before the nickchange */ virtual void OnUserPostNick(User* user, const std::string &oldnick); /** Called before an action which requires a channel privilage check. * This function is called before many functions which check a users status on a channel, for example * before opping a user, deopping a user, kicking a user, etc. * There are several values for access_type which indicate for what reason access is being checked. * These are:

* AC_KICK (0) - A user is being kicked
* AC_DEOP (1) - a user is being deopped
* AC_OP (2) - a user is being opped
* AC_VOICE (3) - a user is being voiced
* AC_DEVOICE (4) - a user is being devoiced
* AC_HALFOP (5) - a user is being halfopped
* AC_DEHALFOP (6) - a user is being dehalfopped
* AC_INVITE () - a user is being invited
* AC_GENERAL_MODE (8) - a user channel mode is being changed

* Upon returning from your function you must return either ACR_DEFAULT, to indicate the module wishes * to do nothing, or ACR_DENY where approprate to deny the action, and ACR_ALLOW where appropriate to allow * the action. Please note that in the case of some access checks (such as AC_GENERAL_MODE) access may be * denied 'upstream' causing other checks such as AC_DEOP to not be reached. Be very careful with use of the * AC_GENERAL_MODE type, as it may inadvertently override the behaviour of other modules. When the access_type * is AC_GENERAL_MODE, the destination of the mode will be NULL (as it has not yet been determined). * @param source The source of the access check * @param dest The destination of the access check * @param channel The channel which is being checked * @param access_type See above */ virtual int OnAccessCheck(User* source,User* dest,Channel* channel,int access_type); /** Called when a 005 numeric is about to be output. * The module should modify the 005 numeric if needed to indicate its features. * @param output The 005 string to be modified if neccessary. */ virtual void On005Numeric(std::string &output); /** Called when a client is disconnected by KILL. * If a client is killed by a server, e.g. a nickname collision or protocol error, * source is NULL. * Return 1 from this function to prevent the kill, and 0 from this function to allow * it as normal. If you prevent the kill no output will be sent to the client, it is * down to your module to generate this information. * NOTE: It is NOT advisable to stop kills which originate from servers or remote users. * If you do so youre risking race conditions, desyncs and worse! * @param source The user sending the KILL * @param dest The user being killed * @param reason The kill reason * @return 1 to prevent the kill, 0 to allow */ virtual int OnKill(User* source, User* dest, const std::string &reason); /** Called when an oper wants to disconnect a remote user via KILL * @param source The user sending the KILL * @param dest The user being killed * @param reason The kill reason */ virtual void OnRemoteKill(User* source, User* dest, const std::string &reason, const std::string &operreason); /** Called whenever a module is loaded. * mod will contain a pointer to the module, and string will contain its name, * for example m_widgets.so. This function is primary for dependency checking, * your module may decide to enable some extra features if it sees that you have * for example loaded "m_killwidgets.so" with "m_makewidgets.so". It is highly * recommended that modules do *NOT* bail if they cannot satisfy dependencies, * but instead operate under reduced functionality, unless the dependency is * absolutely neccessary (e.g. a module that extends the features of another * module). * @param mod A pointer to the new module * @param name The new module's filename */ virtual void OnLoadModule(Module* mod,const std::string &name); /** Called whenever a module is unloaded. * mod will contain a pointer to the module, and string will contain its name, * for example m_widgets.so. This function is primary for dependency checking, * your module may decide to enable some extra features if it sees that you have * for example loaded "m_killwidgets.so" with "m_makewidgets.so". It is highly * recommended that modules do *NOT* bail if they cannot satisfy dependencies, * but instead operate under reduced functionality, unless the dependency is * absolutely neccessary (e.g. a module that extends the features of another * module). * @param mod Pointer to the module being unloaded (still valid) * @param name The filename of the module being unloaded */ virtual void OnUnloadModule(Module* mod,const std::string &name); /** Called once every five seconds for background processing. * This timer can be used to control timed features. Its period is not accurate * enough to be used as a clock, but it is gauranteed to be called at least once in * any five second period, directly from the main loop of the server. * @param curtime The current timer derived from time(2) */ virtual void OnBackgroundTimer(time_t curtime); /** Called whenever any command is about to be executed. * This event occurs for all registered commands, wether they are registered in the core, * or another module, and for invalid commands. Invalid commands may only be sent to this * function when the value of validated is false. By returning 1 from this method you may prevent the * command being executed. If you do this, no output is created by the core, and it is * down to your module to produce any output neccessary. * Note that unless you return 1, you should not destroy any structures (e.g. by using * InspIRCd::QuitUser) otherwise when the command's handler function executes after your * method returns, it will be passed an invalid pointer to the user object and crash!) * @param command The command being executed * @param parameters An array of array of characters containing the parameters for the command * @param pcnt The nuimber of parameters passed to the command * @param user the user issuing the command * @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. * You should only change the parameter list and command string if validated == false (e.g. before the command lookup occurs). * @param original_line The entire original line as passed to the parser from the user * @return 1 to block the command, 0 to allow */ virtual int OnPreCommand(std::string &command, std::vector& parameters, User *user, bool validated, const std::string &original_line); /** Called after any command has been executed. * This event occurs for all registered commands, wether they are registered in the core, * or another module, but it will not occur for invalid commands (e.g. ones which do not * exist within the command table). The result code returned by the command handler is * provided. * @param command The command being executed * @param parameters An array of array of characters containing the parameters for the command * @param pcnt The nuimber of parameters passed to the command * @param user the user issuing the command * @param result The return code given by the command handler, one of CMD_SUCCESS or CMD_FAILURE * @param original_line The entire original line as passed to the parser from the user */ virtual void OnPostCommand(const std::string &command, const std::vector& parameters, User *user, CmdResult result, const std::string &original_line); /** Called to check if a user who is connecting can now be allowed to register * If any modules return false for this function, the user is held in the waiting * state until all modules return true. For example a module which implements ident * lookups will continue to return false for a user until their ident lookup is completed. * Note that the registration timeout for a user overrides these checks, if the registration * timeout is reached, the user is disconnected even if modules report that the user is * not ready to connect. * @param user The user to check * @return true to indicate readiness, false if otherwise */ virtual bool OnCheckReady(User* user); /** Called whenever a user is about to register their connection (e.g. before the user * is sent the MOTD etc). Modules can use this method if they are performing a function * which must be done before the actual connection is completed (e.g. ident lookups, * dnsbl lookups, etc). * Note that you should NOT delete the user record here by causing a disconnection! * Use OnUserConnect for that instead. * @param user The user registering * @return 1 to indicate user quit, 0 to continue */ virtual int OnUserRegister(User* user); /** Called whenever a user joins a channel, to determine if invite checks should go ahead or not. * This method will always be called for each join, wether or not the channel is actually +i, and * determines the outcome of an if statement around the whole section of invite checking code. * return 1 to explicitly allow the join to go ahead or 0 to ignore the event. * @param user The user joining the channel * @param chan The channel being joined * @return 1 to explicitly allow the join, 0 to proceed as normal */ virtual int OnCheckInvite(User* user, Channel* chan); /** Called whenever a mode character is processed. * Return 1 from this function to block the mode character from being processed entirely. * @param user The user who is sending the mode * @param chan The channel the mode is being sent to (or NULL if a usermode) * @param mode The mode character being set * @param param The parameter for the mode or an empty string * @param adding true of the mode is being added, false if it is being removed * @param pcnt The parameter count for the mode (0 or 1) * @return ACR_DENY to deny the mode, ACR_DEFAULT to do standard mode checking, and ACR_ALLOW * to skip all permission checking. Please note that for remote mode changes, your return value * will be ignored! */ virtual int OnRawMode(User* user, Channel* chan, const char mode, const std::string ¶m, bool adding, int pcnt, bool servermode = true); /** Called whenever a user joins a channel, to determine if key checks should go ahead or not. * This method will always be called for each join, wether or not the channel is actually +k, and * determines the outcome of an if statement around the whole section of key checking code. * if the user specified no key, the keygiven string will be a valid but empty value. * return 1 to explicitly allow the join to go ahead or 0 to ignore the event. * @param user The user joining the channel * @param chan The channel being joined * @return 1 to explicitly allow the join, 0 to proceed as normal */ virtual int OnCheckKey(User* user, Channel* chan, const std::string &keygiven); /** Called whenever a user joins a channel, to determine if channel limit checks should go ahead or not. * This method will always be called for each join, wether or not the channel is actually +l, and * determines the outcome of an if statement around the whole section of channel limit checking code. * return 1 to explicitly allow the join to go ahead or 0 to ignore the event. * @param user The user joining the channel * @param chan The channel being joined * @return 1 to explicitly allow the join, 0 to proceed as normal */ virtual int OnCheckLimit(User* user, Channel* chan); /** Called whenever a user joins a channel, to determine if banlist checks should go ahead or not. * This method will always be called for each join, wether or not the user actually matches a channel ban, and * determines the outcome of an if statement around the whole section of ban checking code. * return 1 to explicitly allow the join to go ahead or 0 to ignore the event. * @param user The user joining the channel * @param chan The channel being joined * @return 1 to explicitly allow the join, 0 to proceed as normal. Return -1 to explicitly deny the * join to the channel. */ virtual int OnCheckBan(User* user, Channel* chan); /* Called whenever checking whether or not a user is matched by an applicable extended bantype. * NOTE: may also trigger extra OnCheckStringExtBan events! * @param u The user to check * @param c The channel the user is on * @param type The type of extended ban to check for. */ virtual int OnCheckExtBan(User *u, Channel *c, char type); /** Called whenever checking whether or not a string is extbanned. NOTE: one OnCheckExtBan will also trigger a number of * OnCheckStringExtBan events for seperate host/IP comnbinations. */ virtual int OnCheckStringExtBan(const std::string &s, Channel *c, char type); /** Called on all /STATS commands * This method is triggered for all /STATS use, including stats symbols handled by the core. * @param symbol the symbol provided to /STATS * @param user the user issuing the /STATS command * @param results A string_list to append results into. You should put all your results * into this string_list, rather than displaying them directly, so that your handler will * work when remote STATS queries are received. * @return 1 to block the /STATS from being processed by the core, 0 to allow it */ virtual int OnStats(char symbol, User* user, string_list &results); /** Called whenever a change of a local users displayed host is attempted. * Return 1 to deny the host change, or 0 to allow it. * @param user The user whos host will be changed * @param newhost The new hostname * @return 1 to deny the host change, 0 to allow */ virtual int OnChangeLocalUserHost(User* user, const std::string &newhost); /** Called whenever a change of a local users GECOS (fullname field) is attempted. * return 1 to deny the name change, or 0 to allow it. * @param user The user whos GECOS will be changed * @param newhost The new GECOS * @return 1 to deny the GECOS change, 0 to allow */ virtual int OnChangeLocalUserGECOS(User* user, const std::string &newhost); /** Called whenever a topic is changed by a local user. * Return 1 to deny the topic change, 0 to check details on the change, -1 to let it through with no checks * @param user The user changing the topic * @param chan The channels who's topic is being changed * @param topic The actual topic text * @param 1 to block the topic change, 0 to allow */ virtual int OnLocalTopicChange(User* user, Channel* chan, const std::string &topic); /** Called whenever a local topic has been changed. * To block topic changes you must use OnLocalTopicChange instead. * @param user The user changing the topic * @param chan The channels who's topic is being changed * @param topic The actual topic text */ virtual void OnPostLocalTopicChange(User* user, Channel* chan, const std::string &topic); /** Called whenever an Event class is sent to all module by another module. * Please see the documentation of Event::Send() for further information. The Event sent can * always be assumed to be non-NULL, you should *always* check the value of Event::GetEventID() * before doing anything to the event data, and you should *not* change the event data in any way! * @param event The Event class being received */ virtual void OnEvent(Event* event); /** Called whenever a Request class is sent to your module by another module. * Please see the documentation of Request::Send() for further information. The Request sent * can always be assumed to be non-NULL, you should not change the request object or its data. * Your method may return arbitary data in the char* result which the requesting module * may be able to use for pre-determined purposes (e.g. the results of an SQL query, etc). * @param request The Request class being received */ virtual const char* OnRequest(Request* request); /** Called whenever a password check is to be made. Replaces the old OldOperCompare API. * The password field (from the config file) is in 'password' and is to be compared against * 'input'. This method allows for encryption of passwords (oper, connect:allow, die/restart, etc). * You should return a nonzero value to override the normal comparison, or zero to pass it on. * @param ex The object that's causing the authentication (User* for etc, Server* for ). * @param password The password from the configuration file (the password="" value). * @param input The password entered by the user or whoever. * @param hashtype The hash value from the config * @return 0 to do nothing (pass on to next module/default), 1 == password is OK, -1 == password is not OK */ virtual int OnPassCompare(Extensible* ex, const std::string &password, const std::string &input, const std::string& hashtype); /** Called whenever a user is given usermode +o, anywhere on the network. * You cannot override this and prevent it from happening as it is already happened and * such a task must be performed by another server. You can however bounce modes by sending * servermodes out to reverse mode changes. * @param user The user who is opering */ virtual void OnGlobalOper(User* user); /** Called after a user has fully connected and all modules have executed OnUserConnect * This event is informational only. You should not change any user information in this * event. To do so, use the OnUserConnect method to change the state of local users. * This is called for both local and remote users. * @param user The user who is connecting */ virtual void OnPostConnect(User* user); /** Called whenever a ban is added to a channel's list. * Return a non-zero value to 'eat' the mode change and prevent the ban from being added. * @param source The user adding the ban * @param channel The channel the ban is being added to * @param banmask The ban mask being added * @return 1 to block the ban, 0 to continue as normal */ virtual int OnAddBan(User* source, Channel* channel,const std::string &banmask); /** Called whenever a ban is removed from a channel's list. * Return a non-zero value to 'eat' the mode change and prevent the ban from being removed. * @param source The user deleting the ban * @param channel The channel the ban is being deleted from * @param banmask The ban mask being deleted * @return 1 to block the unban, 0 to continue as normal */ virtual int OnDelBan(User* source, Channel* channel,const std::string &banmask); virtual void OnHookUserIO(User* user, const std::string &targetip); /** Called immediately after any connection is accepted. This is intended for raw socket * processing (e.g. modules which wrap the tcp connection within another library) and provides * no information relating to a user record as the connection has not been assigned yet. * There are no return values from this call as all modules get an opportunity if required to * process the connection. * @param fd The file descriptor returned from accept() * @param ip The IP address of the connecting user * @param localport The local port number the user connected to */ virtual void OnRawSocketAccept(int fd, const std::string &ip, int localport); /** Called immediately before any write() operation on a user's socket in the core. Because * this event is a low level event no user information is associated with it. It is intended * for use by modules which may wrap connections within another API such as SSL for example. * return a non-zero result if you have handled the write operation, in which case the core * will not call write(). * @param fd The file descriptor of the socket * @param buffer A char* buffer being written * @param Number of characters to write * @return Number of characters actually written or 0 if you didn't handle the operation */ virtual int OnRawSocketWrite(int fd, const char* buffer, int count); /** Called immediately before any socket is closed. When this event is called, shutdown() * has not yet been called on the socket. * @param fd The file descriptor of the socket prior to close() */ virtual void OnRawSocketClose(int fd); /** Called immediately upon connection of an outbound BufferedSocket which has been hooked * by a module. * @param fd The file descriptor of the socket immediately after connect() */ virtual void OnRawSocketConnect(int fd); /** Called immediately before any read() operation on a client socket in the core. * This occurs AFTER the select() or poll() so there is always data waiting to be read * when this event occurs. * Your event should return 1 if it has handled the reading itself, which prevents the core * just using read(). You should place any data read into buffer, up to but NOT GREATER THAN * the value of count. The value of readresult must be identical to an actual result that might * be returned from the read() system call, for example, number of bytes read upon success, * 0 upon EOF or closed socket, and -1 for error. If your function returns a nonzero value, * you MUST set readresult. * @param fd The file descriptor of the socket * @param buffer A char* buffer being read to * @param count The size of the buffer * @param readresult The amount of characters read, or 0 * @return nonzero if the event was handled, in which case readresult must be valid on exit */ virtual int OnRawSocketRead(int fd, char* buffer, unsigned int count, int &readresult); /** Called whenever a user sets away or returns from being away. * The away message is available as a parameter, but should not be modified. * At this stage, it has already been copied into the user record. * If awaymsg is empty, the user is returning from away. * @param user The user setting away * @param awaymsg The away message of the user, or empty if returning from away * @return nonzero if the away message should be blocked - should ONLY be nonzero for LOCAL users (IS_LOCAL) (no output is returned by core) */ virtual int OnSetAway(User* user, const std::string &awaymsg); /** Called whenever a NAMES list is requested. * You can produce the nameslist yourself, overriding the current list, * and if you do you must return 1. If you do not handle the names list, * return 0. * @param The user requesting the NAMES list * @param Ptr The channel the NAMES list is requested for * @param userlist The user list for the channel (you may change this pointer. * If you want to change the values, take a copy first, and change the copy, then * point the pointer at your copy) * @return 1 to prevent the user list being sent to the client, 0 to allow it. * Returning -1 allows the names list, but bypasses any checks which check for * channel membership before sending the names list. */ virtual int OnUserList(User* user, Channel* Ptr, CUList* &userlist); /** Called whenever a line of WHOIS output is sent to a user. * You may change the numeric and the text of the output by changing * the values numeric and text, but you cannot change the user the * numeric is sent to. You may however change the user's User values. * @param user The user the numeric is being sent to * @param dest The user being WHOISed * @param numeric The numeric of the line being sent * @param text The text of the numeric, including any parameters * @return nonzero to drop the line completely so that the user does not * receive it, or zero to allow the line to be sent. */ virtual int OnWhoisLine(User* user, User* dest, int &numeric, std::string &text); /** Called at intervals for modules to garbage-collect any hashes etc. * Certain data types such as hash_map 'leak' buckets, which must be * tidied up and freed by copying into a new item every so often. This * method is called when it is time to do that. */ virtual void OnGarbageCollect(); /** Called whenever a user's write buffer has been completely sent. * This is called when the user's write buffer is completely empty, and * there are no more pending bytes to be written and no pending write events * in the socket engine's queue. This may be used to refill the buffer with * data which is being spooled in a controlled manner, e.g. LIST lines. * @param user The user who's buffer is now empty. */ virtual void OnBufferFlushed(User* user); /** Add test suite hooks here. These are used for testing functionality of a module * via the --testsuite debugging parameter. */ virtual void OnRunTestSuite(); /** Called for every item in a NAMES list, so that modules may reformat portions of it as they see fit. * For example NAMESX, channel mode +u and +I, and UHNAMES. If the nick is set to an empty string by any * module, then this will cause the nickname not to be displayed at all. */ virtual void OnNamesListItem(User* issuer, User* user, Channel* channel, std::string &prefixes, std::string &nick); virtual int OnNumeric(User* user, unsigned int numeric, const std::string &text); /** Called for every time the user's host or ident changes, to indicate wether or not the 'Changing host' * message should be sent, if enabled. Certain modules such as auditorium may opt to hide this message * even if it is enabled. */ virtual bool OnHostCycle(User* user); }; #define CONF_NO_ERROR 0x000000 #define CONF_NOT_A_NUMBER 0x000010 #define CONF_INT_NEGATIVE 0x000080 #define CONF_VALUE_NOT_FOUND 0x000100 #define CONF_FILE_NOT_FOUND 0x000200 /** Allows reading of values from configuration files * This class allows a module to read from either the main configuration file (inspircd.conf) or from * a module-specified configuration file. It may either be instantiated with one parameter or none. * Constructing the class using one parameter allows you to specify a path to your own configuration * file, otherwise, inspircd.conf is read. */ class CoreExport ConfigReader : public classbase { protected: InspIRCd* ServerInstance; /** The contents of the configuration file * This protected member should never be accessed by a module (and cannot be accessed unless the * core is changed). It will contain a pointer to the configuration file data with unneeded data * (such as comments) stripped from it. */ ConfigDataHash* data; /** Used to store errors */ std::ostringstream* errorlog; /** If we're using our own config data hash or not */ bool privatehash; /** True if an error occured reading the config file */ bool readerror; /** Error code */ long error; public: /** Default constructor. * This constructor initialises the ConfigReader class to read the inspircd.conf file * as specified when running ./configure. */ ConfigReader(InspIRCd* Instance); /** Overloaded constructor. * This constructor initialises the ConfigReader class to read a user-specified config file */ ConfigReader(InspIRCd* Instance, const std::string &filename); /** Default destructor. * This method destroys the ConfigReader class. */ ~ConfigReader(); /** Retrieves a value from the config file. * This method retrieves a value from the config file. Where multiple copies of the tag * exist in the config file, index indicates which of the values to retrieve. */ std::string ReadValue(const std::string &tag, const std::string &name, int index, bool allow_linefeeds = false); /** Retrieves a value from the config file. * This method retrieves a value from the config file. Where multiple copies of the tag * exist in the config file, index indicates which of the values to retrieve. If the * tag is not found the default value is returned instead. */ std::string ReadValue(const std::string &tag, const std::string &name, const std::string &default_value, int index, bool allow_linefeeds = false); /** Retrieves a boolean value from the config file. * This method retrieves a boolean value from the config file. Where multiple copies of the tag * exist in the config file, index indicates which of the values to retrieve. The values "1", "yes" * and "true" in the config file count as true to ReadFlag, and any other value counts as false. */ bool ReadFlag(const std::string &tag, const std::string &name, int index); /** Retrieves a boolean value from the config file. * This method retrieves a boolean value from the config file. Where multiple copies of the tag * exist in the config file, index indicates which of the values to retrieve. The values "1", "yes" * and "true" in the config file count as true to ReadFlag, and any other value counts as false. * If the tag is not found, the default value is used instead. */ bool ReadFlag(const std::string &tag, const std::string &name, const std::string &default_value, int index); /** Retrieves an integer value from the config file. * This method retrieves an integer value from the config file. Where multiple copies of the tag * exist in the config file, index indicates which of the values to retrieve. Any invalid integer * values in the tag will cause the objects error value to be set, and any call to GetError() will * return CONF_INVALID_NUMBER to be returned. need_positive is set if the number must be non-negative. * If a negative number is placed into a tag which is specified positive, 0 will be returned and GetError() * will return CONF_INT_NEGATIVE. Note that need_positive is not suitable to get an unsigned int - you * should cast the result to achieve that effect. */ int ReadInteger(const std::string &tag, const std::string &name, int index, bool need_positive); /** Retrieves an integer value from the config file. * This method retrieves an integer value from the config file. Where multiple copies of the tag * exist in the config file, index indicates which of the values to retrieve. Any invalid integer * values in the tag will cause the objects error value to be set, and any call to GetError() will * return CONF_INVALID_NUMBER to be returned. needs_unsigned is set if the number must be unsigned. * If a signed number is placed into a tag which is specified unsigned, 0 will be returned and GetError() * will return CONF_NOT_UNSIGNED. If the tag is not found, the default value is used instead. */ int ReadInteger(const std::string &tag, const std::string &name, const std::string &default_value, int index, bool need_positive); /** Returns the last error to occur. * Valid errors can be found by looking in modules.h. Any nonzero value indicates an error condition. * A call to GetError() resets the error flag back to 0. */ long GetError(); /** Counts the number of times a given tag appears in the config file. * This method counts the number of times a tag appears in a config file, for use where * there are several tags of the same kind, e.g. with opers and connect types. It can be * used with the index value of ConfigReader::ReadValue to loop through all copies of a * multiple instance tag. */ int Enumerate(const std::string &tag); /** Returns true if a config file is valid. * This method is partially implemented and will only return false if the config * file does not exist or could not be opened. */ bool Verify(); /** Dumps the list of errors in a config file to an output location. If bail is true, * then the program will abort. If bail is false and user points to a valid user * record, the error report will be spooled to the given user by means of NOTICE. * if bool is false AND user is false, the error report will be spooled to all opers * by means of a NOTICE to all opers. */ void DumpErrors(bool bail,User* user); /** Returns the number of items within a tag. * For example if the tag was <test tag="blah" data="foo"> then this * function would return 2. Spaces and newlines both qualify as valid seperators * between values. */ int EnumerateValues(const std::string &tag, int index); }; /** Caches a text file into memory and can be used to retrieve lines from it. * This class contains methods for read-only manipulation of a text file in memory. * Either use the constructor type with one parameter to load a file into memory * at construction, or use the LoadFile method to load a file. */ class CoreExport FileReader : public classbase { InspIRCd* ServerInstance; /** The file contents */ file_cache fc; /** Content size in bytes */ unsigned long contentsize; /** Calculate content size in bytes */ void CalcSize(); public: /** Default constructor. * This method does not load any file into memory, you must use the LoadFile method * after constructing the class this way. */ FileReader(InspIRCd* Instance); /** Secondary constructor. * This method initialises the class with a file loaded into it ready for GetLine and * and other methods to be called. If the file could not be loaded, FileReader::FileSize * returns 0. */ FileReader(InspIRCd* Instance, const std::string &filename); /** Default destructor. * This deletes the memory allocated to the file. */ ~FileReader(); /** Used to load a file. * This method loads a file into the class ready for GetLine and * and other methods to be called. If the file could not be loaded, FileReader::FileSize * returns 0. */ void LoadFile(const std::string &filename); /** Returns the whole content of the file as std::string */ std::string Contents(); /** Returns the entire size of the file as std::string */ unsigned long ContentSize(); /** Returns true if the file exists * This function will return false if the file could not be opened. */ bool Exists(); /** Retrieve one line from the file. * This method retrieves one line from the text file. If an empty non-NULL string is returned, * the index was out of bounds, or the line had no data on it. */ std::string GetLine(int x); /** Returns the size of the file in lines. * This method returns the number of lines in the read file. If it is 0, no lines have been * read into memory, either because the file is empty or it does not exist, or cannot be * opened due to permission problems. */ int FileSize(); }; /** A DLLFactory (designed to load shared objects) containing a * handle to a module's init_module() function. Unfortunately, * due to the design of shared object systems we must keep this * hanging around, as if we remove this handle, we remove the * shared object file from memory (!) */ typedef DLLFactory ircd_module; /** A list of modules */ typedef std::vector IntModuleList; /** An event handler iterator */ typedef IntModuleList::iterator EventHandlerIter; /** Module priority states */ enum PriorityState { PRIO_DONTCARE, PRIO_FIRST, PRIO_LAST, PRIO_AFTER, PRIO_BEFORE }; /** ModuleManager takes care of all things module-related * in the core. */ class CoreExport ModuleManager : public classbase { private: /** Holds a string describing the last module error to occur */ std::string LastModuleError; /** The feature names published by various modules */ featurelist Features; /** The interface names published by various modules */ interfacelist Interfaces; /** Total number of modules loaded into the ircd */ int ModCount; /** Our pointer to the main insp instance */ InspIRCd* Instance; /** List of loaded modules and shared object/dll handles * keyed by module name */ std::map > Modules; public: /** Event handler hooks. * This needs to be public to be used by FOREACH_MOD and friends. */ IntModuleList EventHandlers[I_END]; /** Simple, bog-standard, boring constructor. */ ModuleManager(InspIRCd* Ins); /** Destructor */ ~ModuleManager(); /** Change the priority of one event in a module. * Each module event has a list of modules which are attached to that event type. * If you wish to be called before or after other specific modules, you may use this * method (usually within void Module::Prioritize()) to set your events priority. * You may use this call in other methods too, however, this is not supported behaviour * for a module. * @param mod The module to change the priority of * @param i The event to change the priority of * @param s The state you wish to use for this event. Use one of * PRIO_FIRST to set the event to be first called, PRIO_LAST to * set it to be the last called, or PRIO_BEFORE and PRIO_AFTER * to set it to be before or after one or more other modules. * @param modules If PRIO_BEFORE or PRIO_AFTER is set in parameter 's', * then this contains a list of one or more modules your module must be * placed before or after. Your module will be placed before the highest * priority module in this list for PRIO_BEFORE, or after the lowest * priority module in this list for PRIO_AFTER. * @param sz The number of modules being passed for PRIO_BEFORE and PRIO_AFTER. * Defaults to 1, as most of the time you will only want to prioritize your module * to be before or after one other module. */ bool SetPriority(Module* mod, Implementation i, PriorityState s, Module** modules = NULL, size_t sz = 1); /** Change the priority of all events in a module. * @param mod The module to set the priority of * @param s The priority of all events in the module. * Note that with this method, it is not possible to effectively use * PRIO_BEFORE or PRIO_AFTER, you should use the more fine tuned * SetPriority method for this, where you may specify other modules to * be prioritized against. */ bool SetPriority(Module* mod, PriorityState s); /** Attach an event to a module. * You may later detatch the event with ModuleManager::Detach(). * If your module is unloaded, all events are automatically detatched. * @param i Event type to attach * @param mod Module to attach event to * @return True if the event was attached */ bool Attach(Implementation i, Module* mod); /** Detatch an event from a module. * This is not required when your module unloads, as the core will * automatically detatch your module from all events it is attached to. * @param i Event type to detach * @param mod Module to detach event from * @param Detach true if the event was detached */ bool Detach(Implementation i, Module* mod); /** Attach an array of events to a module * @param i Event types (array) to attach * @param mod Module to attach events to */ void Attach(Implementation* i, Module* mod, size_t sz); /** Detach all events from a module (used on unload) * @param mod Module to detach from */ void DetachAll(Module* mod); /** Returns text describing the last module error * @return The last error message to occur */ std::string& LastError(); /** Load a given module file * @param filename The file to load * @return True if the module was found and loaded */ bool Load(const char* filename); /** Unload a given module file * @param filename The file to unload * @return True if the module was unloaded */ bool Unload(const char* filename); /** Called by the InspIRCd constructor to load all modules from the config file. */ void LoadAll(); /** Get the total number of currently loaded modules * @return The number of loaded modules */ int GetCount() { return this->ModCount; } /** Find a module by name, and return a Module* to it. * This is preferred over iterating the module lists yourself. * @param name The module name to look up * @return A pointer to the module, or NULL if the module cannot be found */ Module* Find(const std::string &name); /** Publish a 'feature'. * There are two ways for a module to find another module it depends on. * Either by name, using InspIRCd::FindModule, or by feature, using this * function. A feature is an arbitary string which identifies something this * module can do. For example, if your module provides SSL support, but other * modules provide SSL support too, all the modules supporting SSL should * publish an identical 'SSL' feature. This way, any module requiring use * of SSL functions can just look up the 'SSL' feature using FindFeature, * then use the module pointer they are given. * @param FeatureName The case sensitive feature name to make available * @param Mod a pointer to your module class * @returns True on success, false if the feature is already published by * another module. */ bool PublishFeature(const std::string &FeatureName, Module* Mod); /** Publish a module to an 'interface'. * Modules which implement the same interface (the same way of communicating * with other modules) can publish themselves to an interface, using this * method. When they do so, they become part of a list of related or * compatible modules, and a third module may then query for that list * and know that all modules within that list offer the same API. * A prime example of this is the hashing modules, which all accept the * same types of Request class. Consider this to be similar to PublishFeature, * except for that multiple modules may publish the same 'feature'. * @param InterfaceName The case sensitive interface name to make available * @param Mod a pointer to your module class * @returns True on success, false on failure (there are currently no failure * cases) */ bool PublishInterface(const std::string &InterfaceName, Module* Mod); /** Return a pair saying how many other modules are currently using the * interfaces provided by module m. * @param m The module to count usage for * @return A pair, where the first value is the number of uses of the interface, * and the second value is the interface name being used. */ std::pair GetInterfaceInstanceCount(Module* m); /** Mark your module as using an interface. * If you mark your module as using an interface, then that interface * module may not unload until your module has unloaded first. * This can be used to prevent crashes by ensuring code you depend on * is always in memory while your module is active. * @param InterfaceName The interface to use */ void UseInterface(const std::string &InterfaceName); /** Mark your module as finished with an interface. * If you used UseInterface() above, you should use this method when * your module is finished with the interface (usually in its destructor) * to allow the modules which implement the given interface to be unloaded. * @param InterfaceName The interface you are finished with using. */ void DoneWithInterface(const std::string &InterfaceName); /** Unpublish a 'feature'. * When your module exits, it must call this method for every feature it * is providing so that the feature table is cleaned up. * @param FeatureName the feature to remove */ bool UnpublishFeature(const std::string &FeatureName); /** Unpublish your module from an interface * When your module exits, it must call this method for every interface * it is part of so that the interfaces table is cleaned up. Only when * the last item is deleted from an interface does the interface get * removed. * @param InterfaceName the interface to be removed from * @param Mod The module to remove from the interface list */ bool UnpublishInterface(const std::string &InterfaceName, Module* Mod); /** Find a 'feature'. * There are two ways for a module to find another module it depends on. * Either by name, using InspIRCd::FindModule, or by feature, using the * InspIRCd::PublishFeature method. A feature is an arbitary string which * identifies something this module can do. For example, if your module * provides SSL support, but other modules provide SSL support too, all * the modules supporting SSL should publish an identical 'SSL' feature. * To find a module capable of providing the feature you want, simply * call this method with the feature name you are looking for. * @param FeatureName The feature name you wish to obtain the module for * @returns A pointer to a valid module class on success, NULL on failure. */ Module* FindFeature(const std::string &FeatureName); /** Find an 'interface'. * An interface is a list of modules which all implement the same API. * @param InterfaceName The Interface you wish to obtain the module * list of. * @return A pointer to a deque of Module*, or NULL if the interface * does not exist. */ modulelist* FindInterface(const std::string &InterfaceName); /** Determine if a module has published the named interface. * This could be used in, for example, OnLoadModule to pick up other modules that can be used. * @param mod The module to check. * @param InterfaceName the interface you want to check for * @return True if the module provides the interface, false otherwise. */ bool ModuleHasInterface(Module* mod, const std::string& InterfaceName); /** Given a pointer to a Module, return its filename * @param m The module pointer to identify * @return The module name or an empty string */ const std::string& GetModuleName(Module* m); /** Return a list of all modules matching the given filter * @param filter This int is a bitmask of flags set in Module::Flags, * such as VF_VENDOR or VF_STATIC. If you wish to receive a list of * all modules with no filtering, set this to 0. * @return The list of module names */ const std::vector GetAllModuleNames(int filter); }; /** This definition is used as shorthand for the various classes * and functions needed to make a module loadable by the OS. * It defines the class factory and external init_module function. */ #ifdef WINDOWS #define MODULE_INIT(y) \ extern "C" DllExport Module * init_module(InspIRCd* Me) \ { \ return new y(Me); \ } \ BOOLEAN WINAPI DllMain(HINSTANCE hDllHandle, DWORD nReason, LPVOID Reserved) \ { \ switch ( nReason ) \ { \ case DLL_PROCESS_ATTACH: \ case DLL_PROCESS_DETACH: \ break; \ } \ return TRUE; \ } #else #define MODULE_INIT(y) \ extern "C" DllExport Module * init_module(InspIRCd* Me) \ { \ return new y(Me); \ } #endif #endif