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// Copyright 2015 Martin Hebnes Pedersen (LA5NTA). All rights reserved.
// Use of this source code is governed by the MIT-license that can be
// found in the LICENSE file.
package fbb
import (
"crypto/md5"
"encoding/base32"
"fmt"
"time"
)
const MaxMIDLength = 12
// Generates a unique message ID in the format specified by the protocol.
func GenerateMid(callsign string) string {
sum := md5.Sum(midPayload(callsign, time.Now()))
return base32.StdEncoding.EncodeToString(sum[0:])[0:MaxMIDLength]
}
func midPayload(callsign string, t time.Time) []byte {
return []byte(fmt.Sprintf("%s-%s", time.Now(), callsign))
}
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