#include <sys/types.h>
#include <stdint.h>

#include <strobe.h>

#define COMMS_MAXMSG	64

struct pktbuf {
	uint8_t	*pkt;
	uint16_t pktlen;
};

/* first arg is input buffer, second arg is what will be sent as reply */
typedef void (*process_msgfunc_t)(struct pktbuf, struct pktbuf *);

enum comm_state {
	COMMS_WAIT_REQUEST = 1,
	COMMS_WAIT_CONFIRM,
	COMMS_PROCESS_MSGS,
};

struct comms_state {
	strobe_s		cs_state;
	enum comm_state		cs_comm_state;
	strobe_s		cs_start;	/* special starting state cache */

	process_msgfunc_t	cs_procmsg;

	struct pktbuf		cs_prevmsg;
	struct pktbuf		cs_prevmsgresp;

	uint8_t			cs_prevmsgbuf[COMMS_MAXMSG];
	uint8_t			cs_prevmsgrespbuf[COMMS_MAXMSG];
};

size_t _strobe_state_size();

void comms_init(struct comms_state *, process_msgfunc_t, struct pktbuf *);
void comms_process(struct comms_state *, struct pktbuf, struct pktbuf *);