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anope/include/modules.h
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/* Modular support
*
* (C) 2003-2008 Anope Team
* Contact us at info@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 ano_modopen(file) LoadLibrary(file)
/* ano_moderr in modules.c */
#define ano_modsym(file, symbol) (void *)GetProcAddress(file, symbol)
#define ano_modclose(file) FreeLibrary(file) ? 0 : 1
#define ano_modclearerr() SetLastError(0)
#define MODULE_EXT ".dll"
#else
typedef void * ano_module_t;
#define ano_modopen(file) dlopen(file, RTLD_LAZY)
#define ano_moderr() dlerror()
#define ano_modsym(file, symbol) dlsym(file, DL_PREFIX symbol)
#define ano_modclose(file) dlclose(file)
/* 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
/*************************************************************************/
#define CMD_HASH(x) (((x)[0]&31)<<5 | ((x)[1]&31)) /* Will gen a hash from a string :) */
#define MAX_CMD_HASH 1024
#define MOD_STOP 1
#define MOD_CONT 0
#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 HELPSERV HE_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(void);
#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. */
typedef struct Command_ Command;
typedef struct CommandHash_ CommandHash;
typedef struct ModuleLang_ ModuleLang;
typedef struct ModuleHash_ ModuleHash;
typedef struct Message_ Message;
typedef struct MessageHash_ MessageHash;
typedef struct ModuleCallBack_ ModuleCallBack;
typedef struct EvtHook_ EvtHook;
typedef struct EvtHookHash_ EvtHookHash;
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 *HELPSERV[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];
extern MDE EvtHookHash *EVENTHOOKS[MAX_CMD_HASH];
struct ModuleLang_ {
int argc;
char **argv;
};
/** Every module in Anope is actually a class.
*/
CoreExport class Module
{
private:
bool permanent;
public:
/** The module name (e.g. os_modload)
*/
std::string name;
/** The temporary path/filename
*/
std::string filename;
void *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 */
void (*helpHelp)(User *u); /* 7 */
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.
*/
~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);
/**
* 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);
/** Add a module message to the IRCD message hash
* @param m the Message to add
* @param pos the Position to add the message to, e.g. MOD_HEAD, MOD_TAIL, MOD_UNIQUE
* @return MOD_ERR_OK on success, althing else on fail.
**/
int AddEventHook(EvtHook *evh);
/**
* remove the given message from the IRCD message hash
* @param name the name of the message to remove
* @return MOD_ERR_OK on success, althing else on fail.
**/
int DelEventHook(const char *name);
/**
* 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);
};
/** Used to manage modules.
*/
CoreExport class ModuleManager
{
public:
/** 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();
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 Command_ {
char *name;
int (*routine)(User *u);
int (*has_priv)(User *u); /* Returns 1 if user may use command, else 0 */
/* Regrettably, these are hard-coded to correspond to current privilege
* levels (v4.0). Suggestions for better ways to do this are
* appreciated.
*/
int helpmsg_all; /* Displayed to all users; -1 = no message */
int helpmsg_reg; /* Displayed to regular users only */
int helpmsg_oper; /* Displayed to Services operators only */
int helpmsg_admin; /* Displayed to Services admins only */
int helpmsg_root; /* Displayed to Services root only */
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 */
int (*all_help)(User *u);
int (*regular_help)(User *u);
int (*oper_help)(User *u);
int (*admin_help)(User *u);
int (*root_help)(User *u);
Command *next; /* Next command responsible for the same command */
};
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;
};
struct EvtHook_ {
int (*func)(int argc, char **argv);
int core;
char *name;
char *mod_name;
EvtHook *next;
};
struct EvtHookHash_ {
char *name;
EvtHook *evh;
EvtHookHash *next;
};
/*************************************************************************/
/* Module Managment Functions */
MDE Module *findModule(const char *name); /* Find a module */
int encryption_module_init(void); /* Load the encryption module */
int protocol_module_init(void); /* Load the IRCD Protocol Module up*/
void moduleCallBackPrepForUnload(const char *mod_name);
MDE void moduleCallBackDeleteEntry(ModuleCallBack * prev);
MDE char *moduleGetLastBuffer(void);
MDE void moduleSetHelpHelp(void (*func) (User * u));
MDE void moduleDisplayHelp(int service, User *u);
MDE void moduleSetHostHelp(void (*func) (User * u));
MDE void moduleSetOperHelp(void (*func) (User * u));
MDE void moduleSetBotHelp(void (*func) (User * u));
MDE void moduleSetMemoHelp(void (*func) (User * u));
MDE void moduleSetChanHelp(void (*func) (User * u));
MDE void moduleSetNickHelp(void (*func) (User * u));
MDE int moduleAddHelp(Command * c, int (*func) (User * u));
MDE int moduleAddRegHelp(Command * c, int (*func) (User * u));
MDE int moduleAddOperHelp(Command * c, int (*func) (User * u));
MDE int moduleAddAdminHelp(Command * c, int (*func) (User * u));
MDE int moduleAddRootHelp(Command * c, int (*func) (User * u));
extern MDE Module *mod_current_module;
extern MDE const char *mod_current_module_name;
extern MDE char *mod_current_buffer;
extern MDE int mod_current_op;
extern MDE User *mod_current_user;
MDE int moduleGetConfigDirective(Directive *h);
/*************************************************************************/
/*************************************************************************/
/* Command Managment Functions */
MDE Command *createCommand(const char *name,int (*func)(User *u),int (*has_priv)(User *u),int help_all, int help_reg, int help_oper, int help_admin,int help_root);
MDE int destroyCommand(Command *c); /* destroy a command */
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 EvtHook *createEventHook(const char *name, int (*func) (int argc, char **argv));
EvtHook *findEventHook(EvtHookHash * HookEvtTable[], const char *name);
int addCoreEventHook(EvtHookHash * HookEvtTable[], EvtHook * evh);
int delEventHook(EvtHookHash * HookEvtTable[], EvtHook * evh, const char *mod_name);
int destroyEventHook(EvtHook * evh);
MDE void moduleInsertLanguage(int langNumber, int ac, const char **av);
MDE void moduleNoticeLang(char *source, User *u, int number, ...);
MDE const char *moduleGetLangString(User * u, int number);
MDE void moduleDeleteLanguage(int langNumber);
/*************************************************************************/
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);
/************************************************************************/
#endif
/* EOF */
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