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#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 */
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