diff options
author | Jason A. Donenfeld <Jason@zx2c4.com> | 2018-02-12 23:48:09 +0100 |
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committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2018-02-12 23:49:41 +0100 |
commit | ff8f3a412ebf3b83b2d67fdafcc3311800fd39ee (patch) | |
tree | c384d62c158874ca6ebcc25a37cf80a18c56330a /tai64n | |
parent | ea4ea6f9334b8979bec6a881d7f94d7fa94e9b9c (diff) |
Use relative imports
Diffstat (limited to 'tai64n')
-rw-r--r-- | tai64n/tai64n.go | 26 | ||||
-rw-r--r-- | tai64n/tai64n_test.go | 21 |
2 files changed, 47 insertions, 0 deletions
diff --git a/tai64n/tai64n.go b/tai64n/tai64n.go new file mode 100644 index 0000000..da5257c --- /dev/null +++ b/tai64n/tai64n.go @@ -0,0 +1,26 @@ +package tai64n + +import ( + "bytes" + "encoding/binary" + "time" +) + +const TimestampSize = 12 +const base = uint64(4611686018427387914) + +type Timestamp [TimestampSize]byte + +func Now() Timestamp { + var tai64n Timestamp + now := time.Now() + secs := base + uint64(now.Unix()) + nano := uint32(now.UnixNano()) + binary.BigEndian.PutUint64(tai64n[:], secs) + binary.BigEndian.PutUint32(tai64n[8:], nano) + return tai64n +} + +func (t1 Timestamp) After(t2 Timestamp) bool { + return bytes.Compare(t1[:], t2[:]) > 0 +} diff --git a/tai64n/tai64n_test.go b/tai64n/tai64n_test.go new file mode 100644 index 0000000..389b65c --- /dev/null +++ b/tai64n/tai64n_test.go @@ -0,0 +1,21 @@ +package tai64n + +import ( + "testing" + "time" +) + +/* Testing the essential property of the timestamp + * as used by WireGuard. + */ +func TestMonotonic(t *testing.T) { + old := Now() + for i := 0; i < 10000; i++ { + time.Sleep(time.Nanosecond) + next := Now() + if !next.After(old) { + t.Error("TAI64N, not monotonically increasing on nano-second scale") + } + old = next + } +} |