mirror of https://github.com/containers/podman.git
64 lines
1.6 KiB
Go
64 lines
1.6 KiB
Go
package network
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import (
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"fmt"
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"os/exec"
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"github.com/containers/common/pkg/config"
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"github.com/containers/libpod/pkg/util"
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"github.com/containers/libpod/utils"
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"github.com/sirupsen/logrus"
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)
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// GetFreeDeviceName returns a device name that is unused; used when no network
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// name is provided by user
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func GetFreeDeviceName(config *config.Config) (string, error) {
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var (
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deviceNum uint
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deviceName string
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)
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networkNames, err := GetNetworkNamesFromFileSystem(config)
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if err != nil {
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return "", err
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}
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liveNetworksNames, err := GetLiveNetworkNames()
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if err != nil {
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return "", err
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}
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bridgeNames, err := GetBridgeNamesFromFileSystem(config)
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if err != nil {
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return "", err
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}
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for {
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deviceName = fmt.Sprintf("%s%d", CNIDeviceName, deviceNum)
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logrus.Debugf("checking if device name %q exists in other cni networks", deviceName)
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if util.StringInSlice(deviceName, networkNames) {
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deviceNum++
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continue
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}
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logrus.Debugf("checking if device name %q exists in live networks", deviceName)
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if util.StringInSlice(deviceName, liveNetworksNames) {
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deviceNum++
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continue
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}
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logrus.Debugf("checking if device name %q already exists as a bridge name ", deviceName)
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if !util.StringInSlice(deviceName, bridgeNames) {
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break
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}
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deviceNum++
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}
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return deviceName, nil
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}
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// RemoveInterface removes an interface by the given name
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func RemoveInterface(interfaceName string) error {
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// Make sure we have the ip command on the system
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ipPath, err := exec.LookPath("ip")
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if err != nil {
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return err
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}
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// Delete the network interface
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_, err = utils.ExecCmd(ipPath, []string{"link", "del", interfaceName}...)
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return err
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}
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