/* +------------------------------------+ * | Inspire Internet Relay Chat Daemon | * +------------------------------------+ * * Inspire is copyright (C) 2002-2004 ChatSpike-Dev. * E-mail: * * * * Written by Craig Edwards, Craig McLure, and others. * This program is free but copyrighted software; see * the file COPYING for details. * * --------------------------------------------------- */ #ifndef __PLUGIN_H #define __PLUGIN_H // log levels #define DEBUG 10 #define VERBOSE 20 #define DEFAULT 30 #define SPARSE 40 #define NONE 50 // used with OnExtendedMode() method of modules #define MT_CHANNEL 1 #define MT_CLIENT 2 #define MT_SERVER 3 // used with OnAccessCheck() method of modules #define ACR_DEFAULT 0 // Do default action (act as if the module isnt even loaded) #define ACR_DENY 1 // deny the action #define ACR_ALLOW 2 // allow the action #define AC_KICK 0 // a user is being kicked #define AC_DEOP 1 // a user is being deopped #define AC_OP 2 // a user is being opped #define AC_VOICE 3 // a user is being voiced #define AC_DEVOICE 4 // a user is being devoiced #define AC_HALFOP 5 // a user is being halfopped #define AC_DEHALFOP 6 // a user is being dehalfopped #define AC_INVITE 7 // a user is being invited #define AC_GENERAL_MODE 8 // a user channel mode is being changed // used to define a set of behavior bits for a module #define VF_STATIC 1 // module is static, cannot be /unloadmodule'd #define VF_VENDOR 2 // module is a vendor module (came in the original tarball, not 3rd party) #define VF_SERVICEPROVIDER 4 // module provides a service to other modules (can be a dependency) #define VF_COMMON 8 // module needs to be common on all servers in a mesh to link #include "dynamic.h" #include "base.h" #include "ctables.h" #include "socket.h" #include #include #include class Server; /** Low level definition of a FileReader classes file cache area */ typedef std::deque file_cache; typedef file_cache string_list; /** Holds a list of users in a channel */ typedef std::deque chanuserlist; // This #define allows us to call a method in all // loaded modules in a readable simple way, e.g.: // 'FOREACH_MOD OnConnect(user);' #define FOREACH_MOD for (int _i = 0; _i <= MODCOUNT; _i++) modules[_i]-> // 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(x) { MOD_RESULT = 0; \ for (int _i = 0; _i <= MODCOUNT; _i++) { \ int res = modules[_i]->x ; \ if (res != 0) { \ MOD_RESULT = res; \ break; \ } \ } \ } // ********************************************************************************************* #define FD_MAGIC_NUMBER -42 extern void createcommand(char* cmd, handlerfunc f, char flags, int minparams, char* source); extern void server_mode(char **parameters, int pcnt, userrec *user); // class Version holds the version information of a Module, returned // by Module::GetVersion (thanks RD) /** 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. */ class Version : public classbase { public: const int Major, Minor, Revision, Build, Flags; Version(int major, int minor, int revision, int build, int flags); }; /** Holds /ADMIN data * This class contains the admin details of the local server. It is constructed by class Server, * and has three read-only values, Name, Email and Nick that contain the specified values for the * server where the module is running. */ class Admin : public classbase { public: const std::string Name, Email, Nick; Admin(std::string name, std::string email, std::string nick); }; // Forward-delacare module for ModuleMessage etc class Module; // Thanks to Rob (from anope) for the idea of this message passing API // (its been done before, but this seemed a very neat and tidy way... /** 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 ModuleMessage : public classbase { public: /** This class is pure virtual and must be inherited. */ virtual char* Send() = 0; 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 Request : 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 single destination of the Request */ Module* dest; public: /** Create a new Request */ Request(char* anydata, Module* src, Module* dst); /** Fetch the Request data */ char* GetData(); /** 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. */ 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 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, 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(); }; /** 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 plugin to be initialised. */ class Module : public classbase { public: /** Default constructor * creates a module class */ Module(Server* Me); /** Default destructor * destroys a module class */ virtual ~Module(); /** 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 userrec *user */ virtual void OnUserConnect(userrec* user); /** Called when a user quits. * The details of the exiting user are available to you in the parameter userrec *user * This event is only called when the user is fully registered when they quit. To catch * raw disconnections, use the OnUserDisconnect method. */ virtual void OnUserQuit(userrec* user, std::string message); /** Called whenever a user's socket is closed. * The details of the exiting user are available to you in the parameter userrec *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. */ virtual void OnUserDisconnect(userrec* user); /** Called when a user joins a channel. * The details of the joining user are available to you in the parameter userrec *user, * and the details of the channel they have joined is available in the variable chanrec *channel */ virtual void OnUserJoin(userrec* user, chanrec* channel); /** Called when a user parts a channel. * The details of the leaving user are available to you in the parameter userrec *user, * and the details of the channel they have left is available in the variable chanrec *channel */ virtual void OnUserPart(userrec* user, chanrec* channel); /** Called before a packet is transmitted across the irc network between two irc servers. * This allows you to easily represent it in the correct ways to implement encryption, compression, * digital signatures and anything else you may want to add. This should be regarded as a pre-processor * and will be called before ANY other operations within the ircd core program. */ virtual void OnPacketTransmit(std::string &data, std::string serv); /** Called after a packet is received from another irc server. * This allows you to easily represent it in the correct ways to implement encryption, compression, * digital signatures and anything else you may want to add. This should be regarded as a pre-processor * and will be called immediately after the packet is received but before any other operations with the * core of the ircd. */ virtual void OnPacketReceive(std::string &data, std::string serv); /** 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. */ virtual void OnRehash(std::string parameter); /** 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 userrec of the connection sending the * data. This is not possible for outbound data because the data may be being routed to multiple targets. */ virtual void OnServerRaw(std::string &raw, bool inbound, userrec* user); /** Called whenever an extended mode is to be processed. * The type parameter is MT_SERVER, MT_CLIENT or MT_CHANNEL, dependent on where the mode is being * changed. mode_on is set when the mode is being set, in which case params contains a list of * parameters for the mode as strings. If mode_on is false, the mode is being removed, and parameters * may contain the parameters for the mode, dependent on wether they were defined when a mode handler * was set up with Server::AddExtendedMode * If the mode is a channel mode, target is a chanrec*, and if it is a user mode, target is a userrec*. * You must cast this value yourself to make use of it. */ virtual int OnExtendedMode(userrec* user, void* target, char modechar, int type, bool mode_on, string_list ¶ms); /** 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 chanrec* 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. */ virtual int OnUserPreJoin(userrec* user, chanrec* chan, const char* cname); /** 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. */ virtual int OnUserPreKick(userrec* source, userrec* user, chanrec* chan, 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. */ virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, std::string reason); /** Called whenever a user opers locally. * The userrec will contain the oper mode 'o' as this function is called after any modifications * are made to the user's structure by the core. */ virtual void OnOper(userrec* user, std::string opertype); /** Called whenever a user types /INFO. * The userrec 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 */ virtual void OnInfo(userrec* 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. */ virtual void OnWhois(userrec* source, userrec* 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. */ virtual int OnUserPreInvite(userrec* source,userrec* dest,chanrec* channel); virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel); /** 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 userrec* otherwise you must cast it to a chanrec*, this is the details * of where the message is destined to be sent. */ virtual int OnUserPreMessage(userrec* user,void* dest,int target_type, std::string &text); /** 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 userrec* otherwise you must cast it to a chanrec*, 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. */ virtual int OnUserPreNotice(userrec* user,void* dest,int target_type, 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 userrec 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. */ virtual int OnUserPreNick(userrec* user, std::string newnick); virtual void OnUserMessage(userrec* user, void* dest, int target_type, std::string text); virtual void OnUserNotice(userrec* user, void* dest, int target_type, std::string text); virtual void OnMode(userrec* user, void* dest, int target_type, std::string text); virtual void OnGetServerDescription(std::string servername,std::string &description); virtual void OnSyncUser(userrec* user, Module* proto, void* opaque); virtual void OnSyncChannel(chanrec* chan, Module* proto, void* opaque); virtual void OnSyncChannelMetaData(chanrec* chan, Module* proto,void* opaque, std::string extname); virtual void OnSyncUserMetaData(userrec* user, Module* proto,void* opaque, std::string extname); virtual void OnDecodeMetaData(int target_type, void* target, std::string extname, std::string extdata); virtual void ProtoSendMode(void* opaque, int target_type, void* target, std::string modeline); virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, std::string extname, std::string extdata); virtual void OnWallops(userrec* user, std::string text); virtual void OnChangeHost(userrec* user, std::string newhost); virtual void OnChangeName(userrec* user, std::string gecos); virtual void OnAddGLine(long duration, userrec* source, std::string reason, std::string hostmask); virtual void OnAddZLine(long duration, userrec* source, std::string reason, std::string ipmask); virtual void OnAddKLine(long duration, userrec* source, std::string reason, std::string hostmask); virtual void OnAddQLine(long duration, userrec* source, std::string reason, std::string nickmask); virtual void OnAddELine(long duration, userrec* source, std::string reason, std::string hostmask); virtual void OnDelGLine(userrec* source, std::string hostmask); virtual void OnDelZLine(userrec* source, std::string ipmask); virtual void OnDelKLine(userrec* source, std::string hostmask); virtual void OnDelQLine(userrec* source, std::string nickmask); virtual void OnDelELine(userrec* source, std::string hostmask); 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 userrec 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. */ virtual void OnUserPostNick(userrec* user, 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 (7) - 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). */ virtual int OnAccessCheck(userrec* source,userrec* dest,chanrec* 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. */ 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. If you do * so youre risking race conditions, desyncs and worse! */ virtual int OnKill(userrec* source, userrec* dest, std::string reason); /** Called when an oper wants to disconnect a remote user via KILL */ virtual void OnRemoteKill(userrec* source, userrec* dest, std::string reason); /** 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). */ virtual void OnLoadModule(Module* mod,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). */ virtual void OnUnloadModule(Module* mod,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. */ virtual void OnBackgroundTimer(time_t curtime); /** Called whenever a list is needed for a listmode. * For example, when a /MODE #channel +b (without any other parameters) is called, * if a module was handling +b this function would be called. The function can then * output any lists it wishes to. Please note that all modules will see all mode * characters to provide the ability to extend each other, so please only output * a list if the mode character given matches the one(s) you want to handle. */ virtual void OnSendList(userrec* user, chanrec* channel, char mode); /** 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, but it will not occur for invalid commands (e.g. ones which do not * exist within the command table). 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 * Server::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!) */ virtual int OnPreCommand(std::string command, char **parameters, int pcnt, userrec *user); /** 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. */ virtual bool OnCheckReady(userrec* 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. */ virtual void OnUserRegister(userrec* user); /** Called whenever a mode character is processed. * Return 1 from this function to block the mode character from being processed entirely, * so that you may perform your own code instead. Note that this method allows you to override * modes defined by other modes, but this is NOT RECOMMENDED! */ virtual int OnRawMode(userrec* user, chanrec* chan, char mode, std::string param, bool adding, int pcnt); /** 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. */ virtual int OnCheckInvite(userrec* user, chanrec* chan); /** 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. */ virtual int OnCheckKey(userrec* user, chanrec* chan, 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. */ virtual int OnCheckLimit(userrec* user, chanrec* 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. */ virtual int OnCheckBan(userrec* user, chanrec* chan); /** Called on all /STATS commands * This method is triggered for all /STATS use, including stats symbols handled by the core. */ virtual void OnStats(char symbol); /** Called whenever a change of a local users displayed host is attempted. * Return 1 to deny the host change, or 0 to allow it. */ virtual int OnChangeLocalUserHost(userrec* user, 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. */ virtual int OnChangeLocalUserGECOS(userrec* user, std::string newhost); /** Called whenever a topic is changed by a local user. * Return 1 to deny the topic change, or 0 to allow it. */ virtual int OnLocalTopicChange(userrec* user, chanrec* chan, std::string topic); virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, 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! */ 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). */ virtual char* OnRequest(Request* request); /** Called whenever an oper password is to be compared to what a user has input. * The password field (from the config file) is in 'password' and is to be compared against * 'input'. This method allows for encryption of oper passwords and much more besides. * You should return a nonzero value if you want to allow the comparison or zero if you wish * to do nothing. */ virtual int OnOperCompare(std::string password, std::string input); /** 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. */ virtual void OnGlobalOper(userrec* user); /** Called whenever a user connects, anywhere on the network. * 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. */ virtual void OnGlobalConnect(userrec* 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. */ virtual int OnAddBan(userrec* source, chanrec* channel,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. */ virtual int OnDelBan(userrec* source, chanrec* channel,std::string banmask); /** 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. */ virtual void OnRawSocketAccept(int fd, 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(). */ virtual int OnRawSocketWrite(int fd, 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. */ virtual void OnRawSocketClose(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. */ virtual int OnRawSocketRead(int fd, char* buffer, unsigned int count, int &readresult); }; /** Allows server output and query functions * This class contains methods which allow a module to query the state of the irc server, and produce * output to users and other servers. All modules should instantiate at least one copy of this class, * and use its member functions to perform their tasks. */ class Server : public classbase { public: /** Default constructor. * Creates a Server object. */ Server(); /** Default destructor. * Destroys a Server object. */ virtual ~Server(); /** Sends text to all opers. * This method sends a server notice to all opers with the usermode +s. */ virtual void SendOpers(std::string s); /** Writes a log string. * This method writes a line of text to the log. If the level given is lower than the * level given in the configuration, this command has no effect. */ virtual void Log(int level, std::string s); /** Sends a line of text down a TCP/IP socket. * This method writes a line of text to an established socket, cutting it to 510 characters * plus a carriage return and linefeed if required. */ virtual void Send(int Socket, std::string s); /** Sends text from the server to a socket. * This method writes a line of text to an established socket, with the servername prepended * as used by numerics (see RFC 1459) */ virtual void SendServ(int Socket, std::string s); /** Writes text to a channel, but from a server, including all. * This can be used to send server notices to a group of users. */ virtual void SendChannelServerNotice(std::string ServName, chanrec* Channel, std::string text); /** Sends text from a user to a socket. * This method writes a line of text to an established socket, with the given user's nick/ident * /host combination prepended, as used in PRIVSG etc commands (see RFC 1459) */ virtual void SendFrom(int Socket, userrec* User, std::string s); /** Sends text from a user to another user. * This method writes a line of text to a user, with a user's nick/ident * /host combination prepended, as used in PRIVMSG etc commands (see RFC 1459) * If you specify NULL as the source, then the data will originate from the * local server, e.g. instead of: * * :user!ident@host TEXT * * The format will become: * * :localserver TEXT * * Which is useful for numerics and server notices to single users, etc. */ virtual void SendTo(userrec* Source, userrec* Dest, std::string s); /** Sends text from a user to a channel (mulicast). * This method writes a line of text to a channel, with the given user's nick/ident * /host combination prepended, as used in PRIVMSG etc commands (see RFC 1459). If the * IncludeSender flag is set, then the text is also sent back to the user from which * it originated, as seen in MODE (see RFC 1459). */ virtual void SendChannel(userrec* User, chanrec* Channel, std::string s,bool IncludeSender); /** Returns true if two users share a common channel. * This method is used internally by the NICK and QUIT commands, and the Server::SendCommon * method. */ virtual bool CommonChannels(userrec* u1, userrec* u2); /** Sends text from a user to one or more channels (mulicast). * This method writes a line of text to all users which share a common channel with a given * user, with the user's nick/ident/host combination prepended, as used in PRIVMSG etc * commands (see RFC 1459). If the IncludeSender flag is set, then the text is also sent * back to the user from which it originated, as seen in NICK (see RFC 1459). Otherwise, it * is only sent to the other recipients, as seen in QUIT. */ virtual void SendCommon(userrec* User, std::string text,bool IncludeSender); /** Sends a WALLOPS message. * This method writes a WALLOPS message to all users with the +w flag, originating from the * specified user. */ virtual void SendWallops(userrec* User, std::string text); /** Returns true if a nick is valid. * Nicks for unregistered connections will return false. */ virtual bool IsNick(std::string nick); /** Returns a count of the number of users on a channel. * This will NEVER be 0, as if the chanrec exists, it will have at least one user in the channel. */ virtual int CountUsers(chanrec* c); /** Attempts to look up a nick and return a pointer to it. * This function will return NULL if the nick does not exist. */ virtual userrec* FindNick(std::string nick); /** Attempts to look up a nick using the file descriptor associated with that nick. * This function will return NULL if the file descriptor is not associated with a valid user. */ virtual userrec* FindDescriptor(int socket); /** Attempts to look up a channel and return a pointer to it. * This function will return NULL if the channel does not exist. */ virtual chanrec* FindChannel(std::string channel); /** Attempts to look up a user's privilages on a channel. * This function will return a string containing either @, %, +, or an empty string, * representing the user's privilages upon the channel you specify. */ virtual std::string ChanMode(userrec* User, chanrec* Chan); /** Checks if a user is on a channel. * This function will return true or false to indicate if user 'User' is on channel 'Chan'. */ virtual bool IsOnChannel(userrec* User, chanrec* Chan); /** Returns the server name of the server where the module is loaded. */ virtual std::string GetServerName(); /** Returns the network name, global to all linked servers. */ virtual std::string GetNetworkName(); /** Returns the server description string of the local server */ virtual std::string GetServerDescription(); /** Returns the information of the server as returned by the /ADMIN command. * See the Admin class for further information of the return value. The members * Admin::Nick, Admin::Email and Admin::Name contain the information for the * server where the module is loaded. */ virtual Admin GetAdmin(); /** Adds an extended mode letter which is parsed by a module. * This allows modules to add extra mode letters, e.g. +x for hostcloak. * the "type" parameter is either MT_CHANNEL, MT_CLIENT, or MT_SERVER, to * indicate wether the mode is a channel mode, a client mode, or a server mode. * requires_oper is used with MT_CLIENT type modes only to indicate the mode can only * be set or unset by an oper. If this is used for MT_CHANNEL type modes it is ignored. * params_when_on is the number of modes to expect when the mode is turned on * (for type MT_CHANNEL only), e.g. with mode +k, this would have a value of 1. * the params_when_off value has a similar value to params_when_on, except it indicates * the number of parameters to expect when the mode is disabled. Modes which act in a similar * way to channel mode +l (e.g. require a parameter to enable, but not to disable) should * use this parameter. The function returns false if the mode is unavailable, and will not * attempt to allocate another character, as this will confuse users. This also means that * as only one module can claim a specific mode character, the core does not need to keep track * of which modules own which modes, which speeds up operation of the server. In this version, * a mode can have at most one parameter, attempting to use more parameters will have undefined * effects. */ virtual bool AddExtendedMode(char modechar, int type, bool requires_oper, int params_when_on, int params_when_off); /** Adds an extended mode letter which is parsed by a module and handled in a list fashion. * This call is used to implement modes like +q and +a. The characteristics of these modes are * as follows: * * (1) They are ALWAYS on channels, not on users, therefore their type is MT_CHANNEL * * (2) They always take exactly one parameter when being added or removed * * (3) They can be set multiple times, usually on users in channels * * (4) The mode and its parameter are NOT stored in the channels modes structure * * It is down to the module handling the mode to maintain state and determine what 'items' (e.g. users, * or a banlist) have the mode set on them, and process the modes at the correct times, e.g. during access * checks on channels, etc. When the extended mode is triggered the OnExtendedMode method will be triggered * as above. Note that the target you are given will be a channel, if for example your mode is set 'on a user' * (in for example +a) you must use Server::Find to locate the user the mode is operating on. * Your mode handler may return 1 to handle the mode AND tell the core to display the mode change, e.g. * '+aaa one two three' in the case of the mode for 'two', or it may return -1 to 'eat' the mode change, * so the above example would become '+aa one three' after processing. */ virtual bool AddExtendedListMode(char modechar); /** Adds a command to the command table. * This allows modules to add extra commands into the command table. You must place a function within your * module which is is of type handlerfunc: * * typedef void (handlerfunc) (char**, int, userrec*); * ... * void handle_kill(char **parameters, int pcnt, userrec *user) * * When the command is typed, the parameters will be placed into the parameters array (similar to argv) and * the parameter count will be placed into pcnt (similar to argv). There will never be any less parameters * than the 'minparams' value you specified when creating the command. The *user parameter is the class of * the user which caused the command to trigger, who will always have the flag you specified in 'flags' when * creating the initial command. For example to create an oper only command create the commands with flags='o'. * The source parameter is used for resource tracking, and should contain the name of your module (with file * extension) e.g. "m_blarp.so". If you place the wrong identifier here, you can cause crashes if your module * is unloaded. */ virtual void AddCommand(char* cmd, handlerfunc f, char flags, int minparams, char* source); /** Sends a servermode. * you must format the parameters array with the target, modes and parameters for those modes. * * For example: * * char *modes[3]; * * modes[0] = ChannelName; * * modes[1] = "+o"; * * modes[2] = user->nick; * * Srv->SendMode(modes,3,user); * * The modes will originate from the server where the command was issued, however responses (e.g. numerics) * will be sent to the user you provide as the third parameter. * You must be sure to get the number of parameters correct in the pcnt parameter otherwise you could leave * your server in an unstable state! */ virtual void SendMode(char **parameters, int pcnt, userrec *user); /** Sends to all users matching a mode mask * You must specify one or more usermodes as the first parameter. These can be RFC specified modes such as +i, * or module provided modes, including ones provided by your own module. * In the second parameter you must place a flag value which indicates wether the modes you have given will be * logically ANDed or OR'ed. You may use one of either WM_AND or WM_OR. * for example, if you were to use: * * Serv->SendToModeMask("xi", WM_OR, "m00"); * * Then the text 'm00' will be sent to all users with EITHER mode x or i. Conversely if you used WM_AND, the * user must have both modes set to receive the message. */ virtual void SendToModeMask(std::string modes, int flags, std::string text); /** Forces a user to join a channel. * This is similar to svsjoin and can be used to implement redirection, etc. * On success, the return value is a valid pointer to a chanrec* of the channel the user was joined to. * On failure, the result is NULL. */ virtual chanrec* JoinUserToChannel(userrec* user, std::string cname, std::string key); /** Forces a user to part a channel. * This is similar to svspart and can be used to implement redirection, etc. * Although the return value of this function is a pointer to a channel record, the returned data is * undefined and should not be read or written to. This behaviour may be changed in a future version. */ virtual chanrec* PartUserFromChannel(userrec* user, std::string cname, std::string reason); /** Forces a user nickchange. * This command works similarly to SVSNICK, and can be used to implement Q-lines etc. * If you specify an invalid nickname, the nick change will be dropped and the target user will receive * the error numeric for it. */ virtual void ChangeUserNick(userrec* user, std::string nickname); /** Forces a user to quit with the specified reason. * To the user, it will appear as if they typed /QUIT themselves, except for the fact that this function * may bypass the quit prefix specified in the config file. * * WARNING! * * Once you call this function, userrec* user will immediately become INVALID. You MUST NOT write to, or * read from this pointer after calling the QuitUser method UNDER ANY CIRCUMSTANCES! The best course of * action after calling this method is to immediately bail from your handler. */ virtual void QuitUser(userrec* user, std::string reason); /** Matches text against a glob pattern. * Uses the ircd's internal matching function to match string against a globbing pattern, e.g. *!*@*.com * Returns true if the literal successfully matches the pattern, false if otherwise. */ virtual bool MatchText(std::string sliteral, std::string spattern); /** Calls the handler for a command, either implemented by the core or by another module. * You can use this function to trigger other commands in the ircd, such as PRIVMSG, JOIN, * KICK etc, or even as a method of callback. By defining command names that are untypeable * for users on irc (e.g. those which contain a \r or \n) you may use them as callback identifiers. * The first parameter to this method is the name of the command handler you wish to call, e.g. * PRIVMSG. This will be a command handler previously registered by the core or wih AddCommand(). * The second parameter is an array of parameters, and the third parameter is a count of parameters * in the array. If you do not pass enough parameters to meet the minimum needed by the handler, the * functiom will silently ignore it. The final parameter is the user executing the command handler, * used for privilage checks, etc. */ virtual void CallCommandHandler(std::string commandname, char** parameters, int pcnt, userrec* user); virtual bool IsValidModuleCommand(std::string commandname, int pcnt, userrec* user); /** Change displayed hostname of a user. * You should always call this method to change a user's host rather than writing directly to the * dhost member of userrec, as any change applied via this method will be propogated to any * linked servers. */ virtual void ChangeHost(userrec* user, std::string host); /** Change GECOS (fullname) of a user. * You should always call this method to change a user's GECOS rather than writing directly to the * fullname member of userrec, as any change applied via this method will be propogated to any * linked servers. */ virtual void ChangeGECOS(userrec* user, std::string gecos); /** Returns true if the servername you give is ulined. * ULined servers have extra privilages. They are allowed to change nicknames on remote servers, * change modes of clients which are on remote servers and set modes of channels where there are * no channel operators for that channel on the ulined server, amongst other things. Ulined server * data is also broadcast across the mesh at all times as opposed to selectively messaged in the * case of normal servers, as many ulined server types (such as services) do not support meshed * links and must operate in this manner. */ virtual bool IsUlined(std::string server); /** Fetches the userlist of a channel. This function must be here and not a member of userrec or * chanrec due to include constraints. */ virtual chanuserlist GetUsers(chanrec* chan); /** Remove a user's connection to the irc server, but leave their client in existence in the * user hash. When you call this function, the user's file descriptor will be replaced with the * value of FD_MAGIC_NUMBER and their old file descriptor will be closed. This idle client will * remain until it is restored with a valid file descriptor, or is removed from IRC by an operator * After this call, the pointer to user will be invalid. */ virtual bool UserToPseudo(userrec* user,std::string message); /** This user takes one user, and switches their file descriptor with another user, so that one user * "becomes" the other. The user in 'alive' is booted off the server with the given message. The user * referred to by 'zombie' should have previously been locked with Server::ZombifyUser, otherwise * stale sockets and file descriptor leaks can occur. After this call, the pointer to alive will be * invalid, and the pointer to zombie will be equivalent in effect to the old pointer to alive. */ virtual bool PseudoToUser(userrec* alive,userrec* zombie,std::string message); /** Adds a G-line * The G-line is propogated to all of the servers in the mesh and enforced as soon as it is added. * The duration must be in seconds, however you can use the Server::CalcDuration method to convert * durations into the 1w2d3h3m6s format used by /GLINE etc. The source is an arbitary string used * to indicate who or what sent the data, usually this is the nickname of a person, or a server * name. */ virtual void AddGLine(long duration, std::string source, std::string reason, std::string hostmask); /** Adds a Q-line * The Q-line is propogated to all of the servers in the mesh and enforced as soon as it is added. * The duration must be in seconds, however you can use the Server::CalcDuration method to convert * durations into the 1w2d3h3m6s format used by /GLINE etc. The source is an arbitary string used * to indicate who or what sent the data, usually this is the nickname of a person, or a server * name. */ virtual void AddQLine(long duration, std::string source, std::string reason, std::string nickname); /** Adds a Z-line * The Z-line is propogated to all of the servers in the mesh and enforced as soon as it is added. * The duration must be in seconds, however you can use the Server::CalcDuration method to convert * durations into the 1w2d3h3m6s format used by /GLINE etc. The source is an arbitary string used * to indicate who or what sent the data, usually this is the nickname of a person, or a server * name. */ virtual void AddZLine(long duration, std::string source, std::string reason, std::string ipaddr); /** Adds a K-line * The K-line is enforced as soon as it is added. * The duration must be in seconds, however you can use the Server::CalcDuration method to convert * durations into the 1w2d3h3m6s format used by /GLINE etc. The source is an arbitary string used * to indicate who or what sent the data, usually this is the nickname of a person, or a server * name. */ virtual void AddKLine(long duration, std::string source, std::string reason, std::string hostmask); /** Adds a E-line * The E-line is enforced as soon as it is added. * The duration must be in seconds, however you can use the Server::CalcDuration method to convert * durations into the 1w2d3h3m6s format used by /GLINE etc. The source is an arbitary string used * to indicate who or what sent the data, usually this is the nickname of a person, or a server * name. */ virtual void AddELine(long duration, std::string source, std::string reason, std::string hostmask); /** Deletes a G-Line from all servers on the mesh */ virtual bool DelGLine(std::string hostmask); /** Deletes a Q-Line from all servers on the mesh */ virtual bool DelQLine(std::string nickname); /** Deletes a Z-Line from all servers on the mesh */ virtual bool DelZLine(std::string ipaddr); /** Deletes a local K-Line */ virtual bool DelKLine(std::string hostmask); /** Deletes a local E-Line */ virtual bool DelELine(std::string hostmask); /** Calculates a duration * This method will take a string containing a formatted duration (e.g. "1w2d") and return its value * as a total number of seconds. This is the same function used internally by /GLINE etc to set * the ban times. */ virtual long CalcDuration(std::string duration); /** Returns true if a nick!ident@host string is correctly formatted, false if otherwise. */ virtual bool IsValidMask(std::string mask); /** This function finds a module by name. * You must provide the filename of the module. If the module cannot be found (is not loaded) * the function will return NULL. */ virtual Module* FindModule(std::string name); /** Adds a class derived from InspSocket to the server's socket engine. */ virtual void AddSocket(InspSocket* sock); /** Deletes a class derived from InspSocket from the server's socket engine. */ virtual void DelSocket(InspSocket* sock); virtual void RehashServer(); }; #define CONF_NOT_A_NUMBER 0x000010 #define CONF_NOT_UNSIGNED 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 ConfigReader : public classbase { protected: /** 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. */ std::stringstream *cache; std::stringstream *errorlog; /** Used to store errors */ bool readerror; long error; public: /** Default constructor. * This constructor initialises the ConfigReader class to read the inspircd.conf file * as specified when running ./configure. */ ConfigReader(); // default constructor reads ircd.conf /** Overloaded constructor. * This constructor initialises the ConfigReader class to read a user-specified config file */ ConfigReader(std::string filename); // read a module-specific config /** 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(std::string tag, 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. */ bool ReadFlag(std::string tag, std::string name, 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. 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 */ long ReadInteger(std::string tag, std::string name, int index, bool needs_unsigned); /** 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(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,userrec* 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(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 FileReader : public classbase { file_cache fc; 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(); /** 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(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(std::string filename); /** 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(); }; /** Instantiates classes inherited from Module * This class creates a class inherited from type Module, using new. This is to allow for modules * to create many different variants of Module, dependent on architecture, configuration, etc. * In most cases, the simple class shown in the example module m_foobar.so will suffice for most * modules. */ class ModuleFactory : public classbase { public: ModuleFactory() { } virtual ~ModuleFactory() { } /** Creates a new module. * Your inherited class of ModuleFactory must return a pointer to your Module class * using this method. */ virtual Module * CreateModule(Server* Me) = 0; }; typedef DLLFactory ircd_module; #endif