mirror of
https://github.com/yunionio/cloudpods.git
synced 2026-05-16 12:08:20 +08:00
73 lines
1.8 KiB
Go
73 lines
1.8 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 models
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import (
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"fmt"
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"math/rand"
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"yunion.io/x/log"
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"yunion.io/x/pkg/errors"
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"yunion.io/x/pkg/util/regutils"
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"yunion.io/x/sqlchemy"
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"yunion.io/x/onecloud/pkg/compute/options"
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"yunion.io/x/onecloud/pkg/httperrors"
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)
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type IMacGenerator interface {
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FilterByMac(mac string) *sqlchemy.SQuery
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}
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const maxMacTries = 10
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func generateMac(suggestion string) (string, error) {
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for tried := 0; tried < maxMacTries; tried += 1 {
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var mac string
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if len(suggestion) > 0 && regutils.MatchMacAddr(suggestion) {
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mac = suggestion
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suggestion = ""
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} else {
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b := make([]byte, 4)
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_, err := rand.Read(b)
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if err != nil {
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log.Errorf("generate random mac failed: %s", err)
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continue
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}
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mac = fmt.Sprintf("%s:%02x:%02x:%02x:%02x", options.Options.GlobalMacPrefix, b[0], b[1], b[2], b[3])
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}
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found := false
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for _, man := range []IMacGenerator{
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GuestnetworkManager,
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NetTapServiceManager,
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} {
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q := man.FilterByMac(mac)
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cnt, err := q.CountWithError()
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if err != nil {
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log.Errorf("find mac %s error %s", mac, err)
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return "", err
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}
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if cnt > 0 {
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found = true
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break
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}
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}
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if !found {
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return mac, nil
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}
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}
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return "", errors.Wrap(httperrors.ErrTooManyAttempts, "maximal retry reached")
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}
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