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random.go
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// Copyright © 2019 The Things Network Foundation, The Things Industries B.V.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package types
import "encoding/binary"
type randy interface {
Int63() int64
}
func randyUint64(r randy) uint64 {
return uint64(r.Int63())>>31 | uint64(r.Int63())<<32
}
func randy8(r randy) (b [8]byte) {
binary.LittleEndian.PutUint64(b[:], randyUint64(r))
return
}
// NewPopulatedDevNonce returns a random DevNonce.
func NewPopulatedDevNonce(r randy) *DevNonce {
var dn DevNonce
r8 := randy8(r)
copy(dn[:], r8[:])
return &dn
}
// NewPopulatedJoinNonce returns a random JoinNonce.
func NewPopulatedJoinNonce(r randy) *JoinNonce {
var jn JoinNonce
r8 := randy8(r)
copy(jn[:], r8[:])
return &jn
}
// NewPopulatedNetID returns a random NetID.
func NewPopulatedNetID(r randy) *NetID {
var id NetID
r8 := randy8(r)
copy(id[:], r8[:])
return &id
}
// NewPopulatedDevAddr returns a random DevAddr.
func NewPopulatedDevAddr(r randy) *DevAddr {
var addr DevAddr
r8 := randy8(r)
copy(addr[:], r8[:])
return &addr
}
// NewPopulatedDevAddrPrefix returns a random DevAddrPrefix.
func NewPopulatedDevAddrPrefix(r randy) *DevAddrPrefix {
var prefix DevAddrPrefix
prefix.DevAddr = *NewPopulatedDevAddr(r)
prefix.Length = uint8(r.Int63())
return &prefix
}
// NewPopulatedEUI64 returns a random EUI64.
func NewPopulatedEUI64(r randy) *EUI64 {
var eui EUI64
r8 := randy8(r)
copy(eui[:], r8[:])
return &eui
}
// NewPopulatedAES128Key returns a random AES128Key.
func NewPopulatedAES128Key(r randy) *AES128Key {
var key AES128Key
r8a := randy8(r)
r8b := randy8(r)
copy(key[:8], r8a[:])
copy(key[8:], r8b[:])
return &key
}