ncid.h

#ifndef FRAME_NCID_H
#define FRAME_NCID_H
 
#include "common/platform/sys/syscall.h"

 
#define FRAME_NEW_CID 0x18
#define NCID_TOKEN 16
#define NCID_MAX_LEN 20

typedef struct {
  u64 seq;
  u64 retire_prior_to;
  u8 cid_len;
  u8 cid[NCID_MAX_LEN];
  u8 token[NCID_TOKEN];
} ncid_frame;
 
/* Encode into buf of cap bytes. Returns bytes written, or 0 on overflow /
 * invalid (cid_len out of range, or retire_prior_to > seq). */
usz ncid_encode(u8* buf, usz cap, const ncid_frame* f);
 
/* Decode at buf (n readable, type byte 0x18 at buf[0]). Returns bytes
 * consumed, or 0 on malformed / truncated input. */
usz ncid_decode(const u8* buf, usz n, ncid_frame* f);
 
#endif