blob: 369b4f1534b8cea7d9108a5177994016048ef18f [file] [log] [blame]
/*
* Copyright 2018-present Open Networking Foundation
* 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 core
import (
"crypto/rand"
"encoding/hex"
"errors"
"fmt"
m "math/rand"
"strconv"
)
func randomHex(n int) (string, error) {
bytes := make([]byte, n)
if _, err := rand.Read(bytes); err != nil {
return "", err
}
return hex.EncodeToString(bytes), nil
}
// CreateDeviceId produces a device ID. DeviceId is 16 hex long - lower 12 hex is the device id.
// TODO: A cluster unique ID may be required
func CreateDeviceId() string {
val, _ := randomHex(12)
return val
}
// CreateLogicalDeviceId is not used for now as the logical device ID is derived from the
// OLT MAC address
func CreateLogicalDeviceId() string {
// logical device id is 16 hex long - lower 12 hex is the logical device id. For now just generate the 12 hex
val, _ := randomHex(12)
return val
}
// CreateLogicalPortId produces a random port ID for a logical device.
func CreateLogicalPortId() uint32 {
// A logical port is a uint32
return m.Uint32()
}
func CreateDataPathId(idInHexString string) (uint64, error) {
if idInHexString == "" {
return 0, errors.New("id-empty")
}
// First prepend 0x to the string
newId := fmt.Sprintf("0x%s", idInHexString)
if d, err := strconv.ParseUint(newId, 0, 64); err != nil {
return 0, err
} else {
return d, nil
}
}