You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
51 lines
1.4 KiB
51 lines
1.4 KiB
/*
|
|
* Minio Cloud Storage, (C) 2016 Minio, Inc.
|
|
*
|
|
* 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 cmd
|
|
|
|
import (
|
|
"fmt"
|
|
"net"
|
|
"sort"
|
|
)
|
|
|
|
// byLastOctet implements sort.Interface used in sorting a list
|
|
// of ip address by their last octet value.
|
|
type byLastOctet []net.IP
|
|
|
|
func (n byLastOctet) Len() int { return len(n) }
|
|
func (n byLastOctet) Swap(i, j int) { n[i], n[j] = n[j], n[i] }
|
|
func (n byLastOctet) Less(i, j int) bool {
|
|
return []byte(n[i].To4())[3] < []byte(n[j].To4())[3]
|
|
}
|
|
|
|
// sortIPsByOctet - returns a reverse sorted list of hosts based on the last octet value.
|
|
func sortIPsByOctet(ips []string) error {
|
|
var nips []net.IP
|
|
for _, ip := range ips {
|
|
nip := net.ParseIP(ip)
|
|
if nip == nil {
|
|
return fmt.Errorf("Unable to parse invalid ip %s", ip)
|
|
}
|
|
nips = append(nips, nip)
|
|
}
|
|
// Reverse sort ips by their last octet.
|
|
sort.Sort(sort.Reverse(byLastOctet(nips)))
|
|
for i, nip := range nips {
|
|
ips[i] = nip.String()
|
|
}
|
|
return nil
|
|
}
|
|
|