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#ifndef HSM_COM_DATA
#define HSM_COM_DATA

#include "hsm_com_api.h"

#define HSM_COM_SVR_MAX_PATH 255
#define HSM_COM_MAX_CLIENTS	 32

#define HSM_COM_STALE_CNX	30 // (SECONDS) Disregard connection requests older then this

#define HSM_COM_VER 1 /* Note: client and server versions must match. This is always validated */
#define HSM_COM_KEY 0x00066A8239482938ull /* Used to verify that the client code was built with same lib */

typedef enum{
	HSM_COM_C_STATE_UN = 0, /* Client connected but has not sent a connect packet yet */
	HSM_COM_C_STATE_IN,	  /* Client initialized */
	HSM_COM_C_STATE_CT,	  /* Client connected */
	HSM_COM_C_STATE_DN	  /* Disconnect requested, but socket not yet closed */
}hsm_com_state_t;

typedef enum{
	HSM_COM_S_STATE_UN = 0, /* Server uninitialized */
	HSM_COM_S_STATE_IN,	  /* Server initialized (not running) */
	HSM_COM_S_STATE_RN,	  /* Running */
	HSM_COM_S_STATE_DN,	  /* Shutting down initiated */
	HSM_COM_S_STATE_ER	  /* Error state */
}hsm_com_srv_state_t;


#define HSM_COM_CMD_CONN	1
#define HSM_COM_CMD_DISC	2
#define HSM_COM_CMD_PING	3	
#define HSM_COM_CMD_DATA	4

#define HSM_COM_RESP_OK			1
#define HSM_COM_RESP_ERR		2
#define HSM_COM_RESP_INV_LEN	3

typedef struct hsm_com_scratch_s{
	char			*scratch;
	int				scratch_len;
	int				scratch_fill;
}hsm_com_scratch_t;


typedef struct hsm_com_client_s{
	int 				fd;
	int 				uid;
	hsm_com_state_t 	state;
	hsm_com_scratch_t	scr;
}hsm_com_client_t;


typedef struct _hsm_com_server_hdl{	
	char						path[HSM_COM_SVR_MAX_PATH];
	char						*recv_buf;
	char						*send_buf;
	int							buf_len;
	int							max_conx;
	int							conx_cnt;
	hsm_com_client_t			*client_list;
	hsm_com_srv_state_t			server_state;
	unsigned long long			server_pid;
	int							server_fd;
	hsm_com_callback_func		callback;
}hsm_com_server_hdl_t;


typedef struct hsm_com_client_strsvr_s{
	struct hsm_com_client_strsvr_s *next;
	hsm_com_server_hdl_t info;
}hsm_com_client_strsvr_t;


typedef struct _hsm_com_client_hdl{	
	char					s_path[HSM_COM_SVR_MAX_PATH];
	char					c_path[HSM_COM_SVR_MAX_PATH];
	char					*recv_buf;
	char					*send_buf;
	int						buf_len;
	int						client_state;
	int						client_fd;
	hsm_com_scratch_t		scr;
	hsm_com_client_strsvr_t	*stream_list;
	int						trans_id;
}hsm_com_client_hdl_t;

typedef struct hsm_com_common_s{
	unsigned char	ver;
	unsigned char	resp_code;
	unsigned long	cmd;
	unsigned long	trans_id;
	unsigned long	payload_len;
}hsm_com_common_t;

typedef struct hsm_com_con_data_s{
	hsm_com_common_t	header;
	unsigned long long	key;
}hsm_com_con_data_t;

typedef struct hsm_com_discon_data_s{
	hsm_com_common_t	header;
}hsm_com_discon_data_t;

typedef struct hsm_com_ping_data_s{
	hsm_com_common_t	header;
}hsm_com_ping_data_t;


typedef struct hsm_com_msg_s{
	hsm_com_common_t	common;
	char				data[1]; // First byte of the data section.
}hsm_com_msg_t;

hsm_com_errno_t
unix_sck_run_server(hsm_com_server_hdl_t *hdl);

int
unix_sck_read_data(int fd, hsm_com_scratch_t *scratch, char *buf, int buf_len, int *offset);

hsm_com_errno_t
unix_client_connect(hsm_com_client_hdl_t *hdl);

hsm_com_errno_t
unix_client_disconnect(hsm_com_client_hdl_t *hdl);

hsm_com_errno_t
unix_sck_send_ping(hsm_com_client_hdl_t *hdl, int timeout);

hsm_com_errno_t
unix_sck_send_data(hsm_com_client_hdl_t *hdl, int timeout, 
				   hsm_com_datagram_t *send, hsm_com_datagram_t *recv);


#endif
