You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
164 lines
4.9 KiB
164 lines
4.9 KiB
/* Copyright 2016 Alex 'AdUser' Z (ad_user@runbox.com) |
|
* |
|
* This program is free software; you can redistribute it and/or modify |
|
* it under the terms of the GNU General Public License version 2 as |
|
* published by the Free Software Foundation. |
|
*/ |
|
#include <stdbool.h> |
|
#include <stdarg.h> |
|
|
|
enum loglevel { |
|
debug = 0, |
|
info = 1, |
|
notice = 2, |
|
warn = 3, |
|
error = 4, |
|
fatal = 5, |
|
}; /* see log.h */ |
|
|
|
/** |
|
* @file |
|
* This header describes module API of type 'backend' |
|
* |
|
* Sample workflow of module usage: |
|
* |
|
* @msc |
|
* f2b, backend; |
|
* f2b => backend [label="create(init)"]; |
|
* f2b << backend [label="module handler, cfg_t *cfg"]; |
|
* |||; |
|
* f2b => backend [label="config(cfg, param, value)"]; |
|
* f2b << backend [label="true"]; |
|
* f2b => backend [label="config(cfg, param, value)"]; |
|
* f2b << backend [label="true"]; |
|
* f2b => backend [label="config(cfg, param, value)"]; |
|
* f2b <<= backend [label="logcb(level, char *msg)"]; |
|
* f2b << backend [label="false"]; |
|
* |||; |
|
* f2b => backend [label="ready(cfg)"]; |
|
* f2b << backend [label="true"]; |
|
* --- [label="backend is ready for start()"]; |
|
* f2b => backend [label="start()"]; |
|
* f2b << backend [label="true"]; |
|
* --- [label="backend is ready to use"]; |
|
* f2b => backend [label="ping(cfg)"]; |
|
* f2b << backend [label="true"]; |
|
* f2b => backend [label="ping(cfg)"]; |
|
* f2b << backend [label="true"]; |
|
* ... [label="time passed"]; |
|
* f2b => backend [label="ban(cfg, ip)"]; |
|
* f2b << backend [label="true"]; |
|
* f2b => backend [label="ban(cfg, ip)"]; |
|
* f2b <<= backend [label="logcb(level, char *msg)"]; |
|
* f2b << backend [label="false"]; |
|
* ... [label="time passed"]; |
|
* f2b => backend [label="ping(cfg)"]; |
|
* f2b << backend [label="true"]; |
|
* ... [label="time passed"]; |
|
* f2b => backend [label="unban(cfg, ip)"]; |
|
* f2b << backend [label="true"]; |
|
* ... [label="time passed"]; |
|
* f2b => backend [label="stop(cfg)"]; |
|
* f2b << backend [label="true"]; |
|
* --- [label="now you may config(), start() or destroy() backend"]; |
|
* f2b => backend [label="destroy(cfg)"]; |
|
* @endmsc |
|
*/ |
|
|
|
/** |
|
* @def TOKEN_ID |
|
* Only 'exec' backend: placeholder for module id, in ban(), check() and unban() actions |
|
*/ |
|
#define TOKEN_ID "<ID>" |
|
/** |
|
* @def TOKEN_IP |
|
* Only 'exec' backend: placeholder for ip in ban(), check() and unban() actions |
|
*/ |
|
#define TOKEN_IP "<IP>" |
|
/** |
|
* @def ID_MAX |
|
* maximum lenth of id from @a create() |
|
*/ |
|
#define ID_MAX 32 |
|
|
|
/** |
|
* Opaque module handler, contains module internal structs |
|
*/ |
|
typedef struct _config cfg_t; |
|
|
|
/** |
|
* @brief Create instance of module |
|
* @param id Module id, used when 'shared = yes' |
|
* @returns Opaque module handler or NULL on failure |
|
*/ |
|
extern cfg_t *create(const char *id); |
|
/** |
|
* @brief Configure module instance |
|
* @param cfg Module handler |
|
* @param key Parameter name |
|
* @param value Parameter value |
|
* @returns true on success, false on error |
|
*/ |
|
extern bool config(cfg_t *cfg, const char *key, const char *value); |
|
/** |
|
* @brief Checks is module ready for usage |
|
* @param cfg Module handler |
|
* @returns true if ready, false if not |
|
* @note parameters are module-specific, but each module |
|
* at least should handle 'shared' option |
|
*/ |
|
extern bool ready(cfg_t *cfg); |
|
/** |
|
* @brief Allocate resources and start processing |
|
* @param cfg Module handler |
|
* @returns true on success, false on error |
|
*/ |
|
extern bool start(cfg_t *cfg); |
|
/** |
|
* @brief Deallocate resources, prepare for module destroy |
|
* @param cfg Module handler |
|
* @returns true on success |
|
*/ |
|
extern bool stop(cfg_t *cfg); |
|
/** |
|
* @brief Module maintenance routine |
|
* @param cfg Module handler |
|
* @returns true on success |
|
*/ |
|
extern bool ping(cfg_t *cfg); |
|
/** |
|
* @brief Sets the log callback |
|
* @param cfg Module handler |
|
* @param cb Logging callback |
|
* @note Optional, if this function is not called, warnings/errors of module will be suppressed |
|
*/ |
|
extern void logcb(cfg_t *cfg, void (*cb)(enum loglevel l, const char *msg)); |
|
/** |
|
* @brief Make a rabbit disappear |
|
* @param cfg Module handler |
|
* @param ip IP address |
|
* @returns true on success, false on error |
|
*/ |
|
extern bool ban(cfg_t *cfg, const char *ip); |
|
/** |
|
* @brief Check is some ip already banned |
|
* @param cfg Module handler |
|
* @param ip IP address |
|
* @returns true on success, false on error |
|
* @note If this action is meaningless for backend it should return true |
|
*/ |
|
extern bool check(cfg_t *cfg, const char *ip); |
|
/** |
|
* @brief Make a rabbit appear again |
|
* @param cfg Module handler |
|
* @param ip IP address |
|
* @returns true on success, false on error |
|
* @note If this action is meaningless for backend it should return true |
|
*/ |
|
extern bool unban(cfg_t *cfg, const char *ip); |
|
/** |
|
* @brief Free module handle |
|
* @param cfg Module handler |
|
* @note Module handler becomes invalid after calling this function on it |
|
*/ |
|
extern void destroy(cfg_t *cfg);
|
|
|