#ifndef PROTOCOL_DEVICE_PRIVATE_H
#define PROTOCOL_DEVICE_PRIVATE_H

#include "net.h"

#define MAX_PACKET_SIZE_OUT     (64)

/* Maximum size of packet that can fit into the packet buffer. UDP can carry
 * bigger packets but memory is hard to come by and more won't be needed
 * anyway.
 * */
#define MAX_PACKET_SIZE_IN	512
/**
 * Device only gets one connection. Because daemon.
 */
#define MAX_CONNECTIONS		(1UL)

/**
 * Error which says that writing any more to packet buffer will overflow
 * outgoing buffer.
 */
#define E_PACKET_OVERFLOW	(1 << 0)

/**
 * Device's view of connection to daemon.
 */
struct connection_t {
        /**
	 * Initially 0, non-zero when connection is open, 0 when connection
	 * is closed again.
	 */
        int is_live;

	/** Network descriptor that maps to daemon */
	int nd;

        /** Time last packet was reveived */
        time_t last_packet_sec;

        /** Incoming packet buffer */
        char inp_buf[MAX_PACKET_SIZE_IN];

        /** Incoming packet cursor */
        size_t inp_crs;

        /** Outgoing packet buffer */
        char outp_buf[MAX_PACKET_SIZE_OUT];

        /** Outgoing packet cursor */
        size_t outp_crs;

	/**
	 * Next tlv to be returned via get_tlv. NULL initially and after last
	 * element.
	 * */
	struct tlv next_tlv;
};

#endif /* PROTOCOL_DEVICE_PRIVATE_H */