/**
 * @file main.h
 * Definitions for main rspamd structures
 */

#ifndef RSPAMD_MAIN_H
#define RSPAMD_MAIN_H

#include "config.h"
#include "libutil/fstring.h"
#include "libutil/mem_pool.h"
#include "libutil/util.h"
#include "libutil/logger.h"
#include "libutil/http.h"
#include "libutil/upstream.h"
#include "libserver/url.h"
#include "libserver/protocol.h"
#include "libserver/buffer.h"
#include "libserver/events.h"
#include "libserver/roll_history.h"
#include "libserver/task.h"
#include <magic.h>


/* Default values */
#define FIXED_CONFIG_FILE RSPAMD_CONFDIR "/rspamd.conf"
/* Time in seconds to exit for old worker */
#define SOFT_SHUTDOWN_TIME 10

/* Spam subject */
#define SPAM_SUBJECT "*** SPAM *** "

#ifdef CRLF
#undef CRLF
#undef CR
#undef LF
#endif

#define CRLF "\r\n"
#define CR '\r'
#define LF '\n'

/**
 * Worker process structure
 */
struct rspamd_worker {
	pid_t pid;                      /**< pid of worker									*/
	guint index;                    /**< index number									*/
	guint nconns;                   /**< current connections count						*/
	gdouble start_time;             /**< start time										*/
	struct rspamd_main *srv;        /**< pointer to server structure					*/
	GQuark type;                    /**< process type									*/
	GHashTable *signal_events;      /**< signal events									*/
	GList *accept_events;           /**< socket events									*/
	struct rspamd_worker_conf *cf;  /**< worker config data								*/
	gpointer ctx;                   /**< worker's specific data							*/
	gint control_pipe[2];           /**< control pipe. [0] is used by main process,
	                                                   [1] is used by a worker			*/
	gint srv_pipe[2];               /**< used by workers to request something from the
	                                     main process. [0] - main, [1] - worker			*/
	struct event srv_ev;            /**< used by main for read workers' requests		*/
	gpointer control_data;          /**< used by control protocol to handle commands	*/
};

struct rspamd_worker_signal_handler;

struct rspamd_worker_signal_cb {
	void (*handler) (struct rspamd_worker_signal_handler *, void *ud);
	void *handler_data;
	struct rspamd_worker_signal_cb *next, *prev;
};

struct rspamd_worker_signal_handler {
	gint signo;
	gboolean enabled;
	struct event ev;
	struct event_base *base;
	struct rspamd_worker *worker;
	struct rspamd_worker_signal_cb *cb;
};

struct rspamd_controller_pbkdf {
	gint id;
	guint rounds;
	gsize salt_len;
	gsize key_len;
};

/**
 * Common structure representing C module context
 */
struct module_s;
struct module_ctx {
	gint (*filter)(struct rspamd_task *task);                   /**< pointer to headers process function			*/
	struct module_s *mod;										/**< module pointer									*/
	gboolean enabled;											/**< true if module is enabled in configuration		*/
};

/**
 * Module
 */
typedef struct module_s {
	const gchar *name;
	int (*module_init_func)(struct rspamd_config *cfg, struct module_ctx **ctx);
	int (*module_config_func)(struct rspamd_config *cfg);
	int (*module_reconfig_func)(struct rspamd_config *cfg);
	int (*module_attach_controller_func)(struct module_ctx *ctx,
		GHashTable *custom_commands);
} module_t;

typedef struct worker_s {
	const gchar *name;
	gpointer (*worker_init_func)(struct rspamd_config *cfg);
	void (*worker_start_func)(struct rspamd_worker *worker);
	gboolean has_socket;
	gboolean unique;
	gboolean threaded;
	gboolean killable;
	gint listen_type;
} worker_t;

struct pidfh;
struct rspamd_config;
struct tokenizer;
struct rspamd_stat_classifier;
struct rspamd_classifier_config;
struct mime_part;
struct rspamd_dns_resolver;
struct rspamd_task;

/**
 * Server statistics
 */
struct rspamd_stat {
	guint messages_scanned;                             /**< total number of messages scanned				*/
	guint actions_stat[METRIC_ACTION_NOACTION + 1];     /**< statistic for each action						*/
	guint connections_count;                            /**< total connections count						*/
	guint control_connections_count;                    /**< connections count to control interface			*/
	guint messages_learned;                             /**< messages learned								*/
};

/**
 * Struct that determine main server object (for logging purposes)
 */
struct rspamd_main {
	struct rspamd_config *cfg;                                  /**< pointer to config structure					*/
	pid_t pid;                                                  /**< main pid										*/
	/* Pid file structure */
	rspamd_pidfh_t *pfh;                                        /**< struct pidfh for pidfile						*/
	GQuark type;                                                /**< process type									*/
	struct rspamd_stat *stat;                                   /**< pointer to statistics							*/

	rspamd_mempool_t *server_pool;                              /**< server's memory pool							*/
	GHashTable *workers;                                        /**< workers pool indexed by pid                    */
	GHashTable *spairs;                                         /**< socket pairs requested by workers				*/
	rspamd_logger_t *logger;
	uid_t workers_uid;                                          /**< worker's uid running to                        */
	gid_t workers_gid;                                          /**< worker's gid running to						*/
	gboolean is_privilleged;                                    /**< true if run in privilleged mode                */
	gboolean cores_throttling;                                  /**< turn off cores when limits are exceeded		*/
	struct roll_history *history;                               /**< rolling history								*/
	struct event_base *ev_base;
};

/**
 * Structure to point exception in text from processing
 */
struct process_exception {
	gsize pos;
	gsize len;
};

/**
 * Control session object
 */
struct controller_command;
struct controller_session;
typedef gboolean (*controller_func_t)(gchar **args,
	struct controller_session *session);

struct controller_session {
	struct rspamd_worker *worker;                               /**< pointer to worker structure (controller in fact) */
	gint sock;                                                  /**< socket descriptor								*/
	struct controller_command *cmd;                             /**< real command									*/
	struct rspamd_config *cfg;                                  /**< pointer to config file							*/
	GList *parts;                                               /**< extracted mime parts							*/
	struct rspamd_async_session * s;                             /**< async session object							*/
	struct rspamd_dns_resolver *resolver;                       /**< DNS resolver									*/
	struct event_base *ev_base;                                 /**< Event base										*/
};

struct rspamd_external_libs_ctx {
	magic_t libmagic;
	ref_entry_t ref;
};


/**
 * Register custom controller function
 */
void register_custom_controller_command (const gchar *name,
	controller_func_t handler,
	gboolean privilleged,
	gboolean require_message);

#define RSPAMD_PBKDF_ID_V1 1
extern const struct rspamd_controller_pbkdf pbkdf_list[];

#endif

/*
 * vi:ts=4
 */