42 lines
1022 B
Go
42 lines
1022 B
Go
package network
|
|
|
|
import (
|
|
"fmt"
|
|
"github.com/containers/libpod/pkg/util"
|
|
|
|
"github.com/sirupsen/logrus"
|
|
)
|
|
|
|
// GetFreeDeviceName returns a device name that is unused; used when no network
|
|
// name is provided by user
|
|
func GetFreeDeviceName() (string, error) {
|
|
var (
|
|
deviceNum uint
|
|
deviceName string
|
|
)
|
|
networkNames, err := GetNetworkNamesFromFileSystem()
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
liveNetworksNames, err := GetLiveNetworkNames()
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
for {
|
|
deviceName = fmt.Sprintf("%s%d", CNIDeviceName, deviceNum)
|
|
logrus.Debugf("checking if device name %s exists in other cni networks", deviceName)
|
|
if util.StringInSlice(deviceName, networkNames) {
|
|
deviceNum++
|
|
continue
|
|
}
|
|
logrus.Debugf("checking if device name %s exists in live networks", deviceName)
|
|
if !util.StringInSlice(deviceName, liveNetworksNames) {
|
|
break
|
|
}
|
|
// TODO Still need to check the bridge names for a conflict but I dont know
|
|
// how to get them yet!
|
|
deviceNum++
|
|
}
|
|
return deviceName, nil
|
|
}
|