#ifndef NTP_NODE_TIME_H
#define NTP_NODE_TIME_H

#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif

struct UTUN_INSTANCE;

#define NTP_NODE_MAX_PEERS 32

#define NTP_NODE_DRIFT_WARN_US  2000000LL   // 2 seconds
#define NTP_NODE_DRIFT_ERROR_US 10000000LL  // 10 seconds

struct NTP_NODE_PEER {
    uint64_t node_id;
    int64_t  offset_us;   // my_time_recv - peer_time (positive = my clock ahead)
    int      has_offset;  // first offset already stored, subsequent deltas are real drift
};

struct NTP_NODE_TIME {
    struct NTP_NODE_PEER peers[NTP_NODE_MAX_PEERS];
    int peer_count;
};

int  ntp_node_time_init(struct UTUN_INSTANCE* inst);
void ntp_node_time_destroy(struct UTUN_INSTANCE* inst);
void ntp_node_sync_peers(struct UTUN_INSTANCE* inst);

#ifdef __cplusplus
}
#endif

#endif // NTP_NODE_TIME_H