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remove KASession func and add same function from libaitmqtt

#ifndef __MQTTD_H
#define __MQTTD_H


#define API_SERVER_SIDE
#include <mqttapi.h>


struct tagStore {
	char				st_qos;
	u_short				st_msgid;

	mqtt_subscr_t			st_subscr;

	SLIST_ENTRY(tagStore)		st_node;
};

struct tagSession {
	/* client session thread id */
	pthread_t			sess_tid;
	pthread_mutex_t			sess_mtx;
	/* server dispatcher */
	mqtt_srv_t			*sess_srv;

	/* client network settings */
	int				sess_sock;
	u_short				sess_ka;
	/* client send retry in miliseconds, if client not receive message */
	u_int				sess_retry;
	/* message work buffer */
	mqtt_msg_t			*sess_buf;

	/* authentication user info */
	char				sess_cid[MAX_CONNID];
	char				sess_user[MAX_CRED];
	char				sess_pass[MAX_CRED];
	char				sess_addr[64];

	/* connect flags */
	char				sess_clean;
	struct {
		char			flag;
		char			qos;
		char			retain;
		char			*topic;
		char			*msg;
	} sess_will;

	/* session subscriptions */
	SLIST_HEAD(tStore, tagStore)	sess_subscr;

	TAILQ_ENTRY(tagSession)		sess_node;
};
typedef TAILQ_HEAD(, tagSession) sessions_t;
#define SESS_ELEM_LOCK(x)	pthread_mutex_lock(&(x)->sess_mtx)
#define SESS_ELEM_UNLOCK(x)	pthread_mutex_unlock(&(x)->sess_mtx)
#define SESS_LOCK		pthread_mutex_lock(&mtx_sess)
#define SESS_UNLOCK		pthread_mutex_unlock(&mtx_sess)

struct tagPub {
	ait_val_t		pub_name;
	mqtt_msg_t		pub_packet;

	TAILQ_ENTRY(tagPub)	pub_node;
};
typedef TAILQ_HEAD(, tagPub)	pubs_t;
#define PUBS_LOCK		pthread_mutex_lock(&mtx_pub)
#define PUBS_UNLOCK		pthread_mutex_unlock(&mtx_pub)


extern sessions_t Sessions;
extern pubs_t Pubs;
extern sched_root_task_t *root;
extern cfg_root_t cfg;
extern pthread_mutex_t mtx_sess, mtx_pub;


#endif