+ 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 message, 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
+ * @param translate The translation types of the mode parameters
+ */
+ virtual void OnMode(User* user, void* dest, int target_type, const std::vector<std::string> &text, const std::vector<TranslateType> &translate);
+
+ /** 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
+ * @param translate The translation types of the mode parameters
+ */
+ virtual void ProtoSendMode(void* opaque, TargetTypeFlags target_type, void* target, const std::vector<std::string> &modeline, const std::vector<TranslateType> &translate);
+
+ /** 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:<br><br>
+ * AC_KICK - A user is being kicked<br>
+ * AC_DEOP - a user is being deopped<br>
+ * AC_OP - a user is being opped<br>
+ * AC_VOICE - a user is being voiced<br>
+ * AC_DEVOICE - a user is being devoiced<br>
+ * AC_HALFOP - a user is being halfopped<br>
+ * AC_DEHALFOP - a user is being dehalfopped<br>
+ * AC_INVITE - a user is being invited<br>
+ * AC_GENERAL_MODE - a user channel mode is being changed<br><br>
+ * 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<std::string>& 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<std::string>& 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.
+ * @returns 1 = exempt, 0 = no match, -1 = banned
+ */
+ 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.
+ * @returns 1 = exempt, 0 = no match, -1 = banned
+ */
+ 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 <oper> <connect:allow> etc, Server* for <link>).
+ * @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);
+
+ /** 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 client The client IP address and port
+ * @param server The server IP address and port
+ * @param localport The local port number the user connected to
+ */
+ virtual void OnRawSocketAccept(int fd, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server);
+
+ /** 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);