mirror of
https://github.com/yunionio/cloudpods.git
synced 2026-05-08 22:49:22 +08:00
71 lines
1.7 KiB
Go
71 lines
1.7 KiB
Go
// Copyright 2019 Yunion
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package netutils2
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import (
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"fmt"
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"strconv"
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"strings"
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"yunion.io/x/pkg/util/netutils"
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)
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type SMacAddr [6]byte
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func ErrMacFormat(macStr string) error {
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return fmt.Errorf("invalid mac format: %s", macStr)
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}
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func ParseMac(macStr string) (SMacAddr, error) {
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mac := SMacAddr{}
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macStr = netutils.FormatMacAddr(macStr)
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parts := strings.Split(macStr, ":")
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if len(parts) != 6 {
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return mac, ErrMacFormat(macStr)
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}
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for i := 0; i < 6; i += 1 {
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bt, err := strconv.ParseInt(parts[i], 16, 64)
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if err != nil {
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return mac, ErrMacFormat(macStr)
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}
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mac[i] = byte(bt)
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}
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return mac, nil
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}
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func (mac SMacAddr) Add(step int) SMacAddr {
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mac2 := SMacAddr{}
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leftOver := step
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for i := 5; i >= 0; i -= 1 {
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newByte := int(mac[i]) + leftOver
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res := 0
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if newByte < 0 {
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res = ((-newByte) / 0x100) + 1
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newByte = newByte + res*0x100
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}
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mac2[i] = byte(newByte % 0x100)
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leftOver = newByte/0x100 - res
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}
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return mac2
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}
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func (mac SMacAddr) String() string {
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var parts [6]string
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for i := 0; i < len(parts); i += 1 {
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parts[i] = fmt.Sprintf("%02x", mac[i])
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}
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return strings.Join(parts[:], ":")
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}
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