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/* Modular support
*
* (C) 2003-2009 Anope Team
* Contact us at team@anope.org
*
* Please read COPYING and README for furhter details.
*
* Based on the original code of Epona by Lara.
* Based on the original code of Services by Andy Church.
*
* $Id$
*/
#ifndef MODULES_H
#define MODULES_H
#include <time.h>
#include "services.h"
#include <stdio.h>
/* Cross OS compatibility macros */
#ifdef _WIN32
typedef HMODULE ano_module_t;
#define dlopen(file, unused) LoadLibrary(file)
E const char *dlerror();
#define dlsym(file, symbol) (HMODULE)GetProcAddress(file, symbol)
#define dlclose(file) FreeLibrary(file) ? 0 : 1
#define ano_modclearerr() SetLastError(0)
#define MODULE_EXT ".so"
#else
typedef void * ano_module_t;
/* We call dlerror() here because it clears the module error after being
* called. This previously read 'errno = 0', but that didn't work on
* all POSIX-compliant architectures. This way the error is guaranteed
* to be cleared, POSIX-wise. -GD
*/
#define ano_modclearerr() dlerror()
#define MODULE_EXT ".so"
#endif
/** Possible return types from events.
*/
enum EventReturn
{
EVENT_STOP,
EVENT_CONTINUE,
EVENT_ALLOW
};
/**
* This #define allows us to call a method in all
* loaded modules in a readable simple way, e.g.:
* 'FOREACH_MOD(I_OnConnect,OnConnect(user));'
*/
#define FOREACH_MOD(y,x) do { \
std::vector<Module*>::iterator safei; \
for (std::vector<Module*>::iterator _i = ModuleManager::EventHandlers[y].begin(); _i != ModuleManager::EventHandlers[y].end(); ) \
{ \
safei = _i; \
++safei; \
try \
{ \
(*_i)->x ; \
} \
catch (CoreException& modexcept) \
{ \
alog("Exception caught: %s",modexcept.GetReason()); \
} \
_i = safei; \
} \
} while (0);
/**
* This define is similar to the one above but returns a result in MOD_RESULT.
* The first module to return a nonzero result is the value to be accepted,
* and any modules after are ignored.
*/
#define FOREACH_RESULT(y,x) \
do { \
std::vector<Module*>::iterator safei; \
MOD_RESULT = EVENT_CONTINUE; \
for (std::vector<Module*>::iterator _i = ModuleManager::EventHandlers[y].begin(); _i != ModuleManager::EventHandlers[y].end(); ) \
{ \
safei = _i; \
++safei; \
try \
{ \
EventReturn res = (*_i)->x ; \
if (res != EVENT_CONTINUE) { \
MOD_RESULT = res; \
break; \
} \
} \
catch (CoreException& modexcept) \
{ \
alog("Exception caught: %s",modexcept.GetReason()); \
} \
_i = safei; \
} \
} while(0);
/** Priority types which can be returned from Module::Prioritize()
*/
enum Priority { PRIORITY_FIRST, PRIORITY_DONTCARE, PRIORITY_LAST, PRIORITY_BEFORE, PRIORITY_AFTER };
/*************************************************************************/
#define CMD_HASH(x) (((x)[0]&31)<<5 | ((x)[1]&31)) /* Will gen a hash from a string :) */
#define MAX_CMD_HASH 1024
/** The return value from commands.
*/
enum CommandReturn
{
MOD_CONT,
MOD_STOP
};
#define HOSTSERV HS_cmdTable /* using HOSTSERV etc. looks nicer than HS_cmdTable for modules */
#define BOTSERV BS_cmdTable
#define MEMOSERV MS_cmdTable
#define NICKSERV NS_cmdTable
#define CHANSERV CS_cmdTable
#define OPERSERV OS_cmdTable
#define IRCD IRCD_cmdTable
#define MODULE_HASH Module_table
#define EVENT EVENT_cmdTable
#define EVENTHOOKS HOOK_cmdTable
/**********************************************************************
* Module Returns
**********************************************************************/
#define MOD_ERR_OK 0
#define MOD_ERR_MEMORY 1
#define MOD_ERR_PARAMS 2
#define MOD_ERR_EXISTS 3
#define MOD_ERR_NOEXIST 4
#define MOD_ERR_NOUSER 5
#define MOD_ERR_NOLOAD 6
#define MOD_ERR_NOUNLOAD 7
#define MOD_ERR_SYNTAX 8
#define MOD_ERR_NODELETE 9
#define MOD_ERR_UNKNOWN 10
#define MOD_ERR_FILE_IO 11
#define MOD_ERR_NOSERVICE 12
#define MOD_ERR_NO_MOD_NAME 13
/*************************************************************************/
/* Macros to export the Module API functions/variables */
#ifndef _WIN32
#define MDE
#else
#ifndef MODULE_COMPILE
#define MDE __declspec(dllexport)
#else
#define MDE __declspec(dllimport)
#endif
#endif
/*************************************************************************/
#if !defined(_WIN32)
#include <dlfcn.h>
/* Define these for systems without them */
#ifndef RTLD_NOW
#define RTLD_NOW 0
#endif
#ifndef RTLD_LAZY
#define RTLD_LAZY RTLD_NOW
#endif
#ifndef RTLD_GLOBAL
#define RTLD_GLOBAL 0
#endif
#ifndef RTLD_LOCAL
#define RTLD_LOCAL 0
#endif
#else
const char *ano_moderr();
#endif
typedef enum { CORE,PROTOCOL,THIRD,SUPPORTED,QATESTED,ENCRYPTION } MODType;
typedef enum { MOD_OP_LOAD, MOD_OP_UNLOAD } ModuleOperation;
/*************************************************************************/
/* Structure for information about a *Serv command. */
struct CommandHash;
typedef struct ModuleLang_ ModuleLang;
typedef struct ModuleHash_ ModuleHash;
typedef struct Message_ Message;
typedef struct MessageHash_ MessageHash;
typedef struct ModuleCallBack_ ModuleCallBack;
/*************************************************************************/
extern MDE CommandHash *HOSTSERV[MAX_CMD_HASH];
extern MDE CommandHash *BOTSERV[MAX_CMD_HASH];
extern MDE CommandHash *MEMOSERV[MAX_CMD_HASH];
extern MDE CommandHash *NICKSERV[MAX_CMD_HASH];
extern MDE CommandHash *CHANSERV[MAX_CMD_HASH];
extern MDE CommandHash *OPERSERV[MAX_CMD_HASH];
extern MDE MessageHash *IRCD[MAX_CMD_HASH];
extern MDE ModuleHash *MODULE_HASH[MAX_CMD_HASH];
struct ModuleLang_ {
int argc;
char **argv;
};
enum CommandFlags
{
CFLAG_ALLOW_UNREGISTERED = 1,
CFLAG_ALLOW_FORBIDDEN = 2,
CFLAG_ALLOW_SUSPENDED = 4
};
/** Every services command is a class, inheriting from Command.
*/
class CoreExport Command
{
int flags;
public:
size_t MaxParams;
size_t MinParams;
std::string name;
/** Create a new command.
* @param min_params The minimum number of parameters the parser will require to execute this command
* @param max_params The maximum number of parameters the parser will create, after max_params, all will be combined into the last argument.
* NOTE: If max_params is not set (default), there is no limit to the max number of params.
*/
Command(const std::string &sname, size_t min_params, size_t max_params = 0);
virtual ~Command();
/** Execute this command.
* @param u The user executing the command.
*/
virtual CommandReturn Execute(User *u, std::vector<std::string> &);
/** Requested when the user is requesting help on this command. Help on this command should be sent to the user.
* @param u The user requesting help
* @param subcommand The subcommand the user is requesting help on, or an empty string. (e.g. /ns help set foo bar lol gives a subcommand of "FOO BAR LOL")
* @return true if help was provided to the user, false otherwise.
*/
virtual bool OnHelp(User *u, const std::string &subcommand);
/** Requested when the user provides bad syntax to this command (not enough params, etc).
* @param u The user executing the command.
*/
virtual void OnSyntaxError(User *u);
/** Set a certain flag on this command.
* @param flag The CommandFlag to set on this command.
*/
void SetFlag(CommandFlags flag);
/** Remove a certain flag from this command.
* @param flag The CommandFlag to unset.
*/
void UnsetFlag(CommandFlags flag);
/** Check whether a certain flag is set on this command.
* @param flag The CommandFlag to check.
* @return bool True if the flag is set, false else.
*/
bool HasFlag(CommandFlags flag) const;
char *help_param1;
char *help_param2;
char *help_param3;
char *help_param4;
/* Module related stuff */
int core; /* Can this command be deleted? */
char *mod_name; /* Name of the module who owns us, NULL for core's */
char *service; /* Service we provide this command for */
Command *next;
};
/** Every module in Anope is actually a class.
*/
class CoreExport Module
{
private:
bool permanent;
public:
/** The module name (e.g. os_modload)
*/
std::string name;
/** The temporary path/filename
*/
std::string filename;
ano_module_t handle;
time_t created;
std::string version;
std::string author;
MODType type;
void (*nickHelp)(User *u); /* service 1 */
void (*chanHelp)(User *u); /* 2 */
void (*memoHelp)(User *u); /* 3 */
void (*botHelp)(User *u); /* 4 */
void (*operHelp)(User *u); /* 5 */
void (*hostHelp)(User *u); /* 6 */
MessageHash *msgList[MAX_CMD_HASH];
ModuleLang lang[NUM_LANGS];
/** Creates and initialises a new module.
* @param loadernick The nickname of the user loading the module.
*/
Module(const std::string &modname, const std::string &loadernick);
/** Destroys a module, freeing resources it has allocated.
*/
virtual ~Module();
/** Sets a given type (CORE,PROTOCOL,3RD etc) on a module.
* @param type The type to set the module as.
*/
void SetType(MODType type);
/** Toggles the permanent flag on a module. If a module is permanent,
* then it may not be unloaded.
*
* Naturally, this setting should be used sparingly!
*
* @param state True if this module should be permanent, false else.
*/
void SetPermanent(bool state);
/** Retrieves whether or not a given module is permanent.
* @return true if the module is permanent, false else.
*/
bool GetPermanent();
/** Set the modules version info.
* @param version the version of the module
*/
void SetVersion(const std::string &version);
/** Set the modules author info
* @param author the author of the module
*/
void SetAuthor(const std::string &author);
/**
* Add output to nickserv help.
* when doing a /msg nickserv help, your function will be called to allow it to send out a notice() with the code you wish to dispaly
* @param func a pointer to the function which will display the code
**/
void SetNickHelp(void (*func)(User *));
/**
* Add output to chanserv help.
* when doing a /msg chanserv help, your function will be called to allow it to send out a notice() with the code you wish to dispaly
* @param func a pointer to the function which will display the code
**/
void SetChanHelp(void (*func)(User *));
/**
* Add output to memoserv help.
* when doing a /msg memoserv help, your function will be called to allow it to send out a notice() with the code you wish to dispaly
* @param func a pointer to the function which will display the code
**/
void SetMemoHelp(void (*func)(User *));
/**
* Add output to botserv help.
* when doing a /msg botserv help, your function will be called to allow it to send out a notice() with the code you wish to dispaly
* @param func a pointer to the function which will display the code
**/
void SetBotHelp(void (*func)(User *));
/**
* Add output to operserv help.
* when doing a /msg operserv help, your function will be called to allow it to send out a notice() with the code you wish to dispaly
* @param func a pointer to the function which will display the code
**/
void SetOperHelp(void (*func)(User *));
/**
* Add output to hostserv help.
* when doing a /msg hostserv help, your function will be called to allow it to send out a notice() with the code you wish to dispaly
* @param func a pointer to the function which will display the code
**/
void SetHostHelp(void (*func)(User *));
/**
* Allow a module to add a set of language strings to anope
* @param langNumber the language number for the strings
* @param ac The language count for the strings
* @param av The language sring list.
**/
void InsertLanguage(int langNumber, int ac, const char **av);
/**
* Delete a language from a module
* @param langNumber the language Number to delete
**/
void DeleteLanguage(int langNumber);
/**
* Get the text of the given lanugage string in the corrent language, or
* in english.
* @param u The user to send the message to
* @param number The message number
**/
const char *GetLangString(User *u, int number);
/**
* Send a notice to the user in the correct language, or english.
* @param source Who sends the notice
* @param u The user to send the message to
* @param number The message number
* @param ... The argument list
**/
void NoticeLang(char *source, User * u, int number, ...);
/**
* Add a module provided command to the given service.
* e.g. AddCommand(NICKSERV,c,MOD_HEAD);
* @param cmdTable the services to add the command to
* @param c the command to add
* @param pos the position to add to, MOD_HEAD, MOD_TAIL, MOD_UNIQUE
* @see createCommand
* @return MOD_ERR_OK on successfully adding the command
*/
int AddCommand(CommandHash *cmdTable[], Command * c, int pos);
/**
* Delete a command from the service given.
* @param cmdTable the cmdTable for the services to remove the command from
* @param name the name of the command to delete from the service
* @return returns MOD_ERR_OK on success
*/
int DelCommand(CommandHash * cmdTable[], const char *name);
/**
* Adds a timed callback for the current module.
* This allows modules to request that anope executes one of there functions at a time in the future, without an event to trigger it
* @param name the name of the callback, this is used for refrence mostly, but is needed it you want to delete this particular callback later on
* @param when when should the function be executed, this is a time in the future, seconds since 00:00:00 1970-01-01 UTC
* @param func the function to be executed when the callback is ran, its format MUST be int func(int argc, char **argv);
* @param argc the argument count for the argv paramter
* @param atgv a argument list to be passed to the called function.
* @return MOD_ERR_OK on success, anything else on fail.
* @see moduleDelCallBack
**/
int AddCallback(const char *name, time_t when, int (*func) (int argc, char *argv[]), int argc, char **argv);
/**
* Allow modules to delete a timed callback by name.
* @param name the name of the callback they wish to delete
**/
void DelCallback(const char *name);
/** Called when the ircd notifies that a user has been kicked from a channel.
* @param c The channel the user has been kicked from.
* @param target The user that has been kicked.
* @param kickmsg The reason for the kick.
* NOTE: We may want to add a second User arg for sender in the future.
*/
virtual void OnUserKicked(Channel *c, User *target, const std::string &kickmsg) { }
/** Called when Services' configuration has been loaded.
* @param startup True if Services is starting for the first time, false otherwise.
*/
virtual void OnReload(bool startup) {}
/** Called before a bot is assigned to a channel.
* @param sender The user assigning the bot
* @param ci The channel the bot is to be assigned to.
* @param bi The bot being assigned.
* @return EVENT_CONTINUE to let other modules decide, EVENT_STOP to deny the assign.
*/
virtual EventReturn OnBotAssign(User *sender, ChannelInfo *ci, BotInfo *bi) { return EVENT_CONTINUE; }
/** Called before a bot is unassigned from a channel.
* @param sender The user unassigning the bot
* @param ci The channel the bot is being removed from
* @return EVENT_CONTINUE to let other modules decide, EVENT_STOP to deny the unassign.
*/
virtual EventReturn OnBotUnAssign(User *sender, ChannelInfo *ci) { return EVENT_CONTINUE; }
/** Called when a new user connects to the network.
* @param u The connecting user.
*/
virtual void OnUserConnect(User *u) { }
/** Called when a new server connects to the network.
* @param s The server that has connected to the network
*/
virtual void OnServerConnect(Server *s) { }
/** Called after a user changed the nick
* @param u The user.
* @param oldnick the old nick of the user
*/
virtual void OnUserNickChange(User *u, const char *oldnick) { }
/** Called before a command is due to be executed.
* @param u The user executing the command
* @param service The service the command is associated with
* @param command The command the user is executing
* @param params The parameters the user is sending
* @return EVENT_CONTINUE to let other modules decide, EVENT_STOP to halt the command and not process it
*/
virtual EventReturn OnPreCommand(User *u, const std::string &service, const std::string &command, const std::vector<std::string> &params) { return EVENT_CONTINUE; }
/** Called after a command has been executed.
* @param u The user executing the command
* @param service The service the command is associated with
* @param command The command the user executed
* @param params The parameters the user sent
*/
virtual void OnPostCommand(User *u, const std::string &service, const std::string &command, const std::vector<std::string> &params) { }
/** Called when anope saves databases.
* NOTE: This event is deprecated pending new database handling.
* XXX.
*/
virtual void OnSaveDatabase() MARK_DEPRECATED { }
/** Called when anope backs up databases.
* NOTE: This event is deprecated pending new database handling.
*/
virtual void OnBackupDatabase() MARK_DEPRECATED { }
};
/** Implementation-specific flags which may be set in Module::Implements()
*/
enum Implementation
{
I_BEGIN,
I_OnUserKicked, I_OnReload, I_OnBotAssign, I_OnBotUnAssign, I_OnUserConnect, I_OnServerConnect,
I_OnPreCommand, I_OnPostCommand, I_OnUserNickChange,
I_OnSaveDatabase, I_OnBackupDatabase,
I_END
};
/** Used to manage modules.
*/
class CoreExport ModuleManager
{
public:
/** Event handler hooks.
* This needs to be public to be used by FOREACH_MOD and friends.
*/
static std::vector<Module *> EventHandlers[I_END];
/** Load up a list of modules.
* @param total_modules The number of modules to load
* @param module_list The list of modules to load
**/
static void LoadModuleList(int total_modules, char **module_list);
/** Loads a given module.
* @param m the module to load
* @param u the user who loaded it, NULL for auto-load
* @return MOD_ERR_OK on success, anything else on fail
*/
static int LoadModule(const std::string &modname, User * u);
/** Unload the given module.
* @param m the module to unload
* @param u the user who unloaded it
* @return MOD_ERR_OK on success, anything else on fail
*/
static int UnloadModule(Module *m, User * u);
/** Run all pending module timer callbacks.
*/
static void RunCallbacks();
/** Change the priority of one event in a module.
* Each module event has a list of modules which are attached to that event type. If you wish to be called before or after other specific modules, you may use this
* method (usually within void Module::Prioritize()) to set your events priority. You may use this call in other methods too, however, this is not supported behaviour
* for a module.
* @param mod The module to change the priority of
* @param i The event to change the priority of
* @param s The state you wish to use for this event. Use one of
* PRIO_FIRST to set the event to be first called, PRIO_LAST to set it to be the last called, or PRIO_BEFORE and PRIO_AFTER
* to set it to be before or after one or more other modules.
* @param modules If PRIO_BEFORE or PRIO_AFTER is set in parameter 's', then this contains a list of one or more modules your module must be
* placed before or after. Your module will be placed before the highest priority module in this list for PRIO_BEFORE, or after the lowest
* priority module in this list for PRIO_AFTER.
* @param sz The number of modules being passed for PRIO_BEFORE and PRIO_AFTER. Defaults to 1, as most of the time you will only want to prioritize your module
* to be before or after one other module.
*/
static bool SetPriority(Module* mod, Implementation i, Priority s, Module** modules = NULL, size_t sz = 1);
/** Change the priority of all events in a module.
* @param mod The module to set the priority of
* @param s The priority of all events in the module.
* Note that with this method, it is not possible to effectively use PRIO_BEFORE or PRIO_AFTER, you should use the more fine tuned
* SetPriority method for this, where you may specify other modules to be prioritized against.
*/
static bool SetPriority(Module* mod, Priority s);
/** Attach an event to a module.
* You may later detatch the event with ModuleManager::Detach(). If your module is unloaded, all events are automatically detatched.
* @param i Event type to attach
* @param mod Module to attach event to
* @return True if the event was attached
*/
static bool Attach(Implementation i, Module* mod);
/** Detatch an event from a module.
* This is not required when your module unloads, as the core will automatically detatch your module from all events it is attached to.
* @param i Event type to detach
* @param mod Module to detach event from
* @param Detach true if the event was detached
*/
static bool Detach(Implementation i, Module* mod);
/** Detach all events from a module (used on unload)
* @param mod Module to detach from
*/
static void DetachAll(Module* mod);
/** Attach an array of events to a module
* @param i Event types (array) to attach
* @param mod Module to attach events to
*/
static void Attach(Implementation* i, Module* mod, size_t sz);
private:
/** Call the module_delete function to safely delete the module
* @param m the module to delete
*/
static void DeleteModule(Module *m);
};
struct ModuleHash_ {
char *name;
Module *m;
ModuleHash *next;
};
struct CommandHash {
char *name; /* Name of the command */
Command *c; /* Actual command */
CommandHash *next; /* Next command */
};
struct Message_ {
char *name;
int (*func)(const char *source, int ac, const char **av);
int core;
Message *next;
};
struct MessageHash_ {
char *name;
Message *m;
MessageHash *next;
};
struct ModuleCallBack_ {
char *name;
char *owner_name;
time_t when;
int (*func)(int argc, char *argv[]);
int argc;
char **argv;
ModuleCallBack *next;
};
/*************************************************************************/
/* Module Managment Functions */
MDE Module *findModule(const char *name); /* Find a module */
int encryption_module_init(); /* Load the encryption module */
int protocol_module_init(); /* Load the IRCD Protocol Module up*/
void moduleCallBackPrepForUnload(const char *mod_name);
MDE void moduleCallBackDeleteEntry(ModuleCallBack * prev);
MDE void moduleDisplayHelp(int service, User *u);
/*************************************************************************/
/*************************************************************************/
/* Command Managment Functions */
Command *findCommand(CommandHash *cmdTable[], const char *name); /* Find a command */
/*************************************************************************/
/* Message Managment Functions */
MDE Message *createMessage(const char *name,int (*func)(const char *source, int ac, const char **av));
Message *findMessage(MessageHash *msgTable[], const char *name); /* Find a Message */
MDE int addMessage(MessageHash *msgTable[], Message *m, int pos); /* Add a Message to a Message table */
MDE int addCoreMessage(MessageHash *msgTable[], Message *m); /* Add a Message to a Message table */
int delMessage(MessageHash *msgTable[], Message *m); /* Del a Message from a msg table */
int destroyMessage(Message *m); /* destroy a Message*/
/*************************************************************************/
MDE bool moduleMinVersion(int major,int minor,int patch,int build); /* Checks if the current version of anope is before or after a given verison */
/*************************************************************************/
/* Some IRCD protocol module support functions */
/** Update the protect deatials, could be either protect or admin etc.. */
MDE void updateProtectDetails(const char *level_info_protect_word, const char *level_info_protectme_word, const char *fant_protect_add, const char *fant_protect_del, const char *level_protect_word, const char *protect_set_mode, const char *protect_unset_mode);
MDE void updateOwnerDetails(const char *fant_owner_add, const char *fant_owner_del, const char *owner_set_mode, const char *owner_del_mode);
/************************************************************************/
#endif
/* EOF */
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