Beispiel #1
0
// newInterface creates a new bridge interface structure. It attempts to find
// an already existing device identified by the configuration BridgeName field,
// or the default bridge name when unspecified, but doesn't attempt to create
// one when missing
func newInterface(nlh *netlink.Handle, config *networkConfiguration) *bridgeInterface {
	var err error
	i := &bridgeInterface{nlh: nlh}

	// Initialize the bridge name to the default if unspecified.
	if config.BridgeName == "" {
		config.BridgeName = DefaultBridgeName
	}

	// Attempt to find an existing bridge named with the specified name.
	i.Link, err = nlh.LinkByName(config.BridgeName)
	if err != nil {
		logrus.Debugf("Did not find any interface with name %s: %v", config.BridgeName, err)
	}
	return i
}
Beispiel #2
0
// newInterface creates a new bridge interface structure. It attempts to find
// an already existing device identified by the configuration BridgeName field,
// or the default bridge name when unspecified, but doesn't attempt to create
// one when missing
func newInterface(nlh *netlink.Handle, config *networkConfiguration) (*bridgeInterface, error) {
	var err error
	i := &bridgeInterface{nlh: nlh}

	// Initialize the bridge name to the default if unspecified.
	if config.BridgeName == "" {
		config.BridgeName = DefaultBridgeName
	}

	// Attempt to find an existing bridge named with the specified name.
	i.Link, err = nlh.LinkByName(config.BridgeName)
	if err != nil {
		logrus.Debugf("Did not find any interface with name %s: %v", config.BridgeName, err)
	} else if _, ok := i.Link.(*netlink.Bridge); !ok {
		return nil, fmt.Errorf("existing interface %s is not a bridge", i.Link.Attrs().Name)
	}
	return i, nil
}
Beispiel #3
0
func addToBridge(nlh *netlink.Handle, ifaceName, bridgeName string) error {
	link, err := nlh.LinkByName(ifaceName)
	if err != nil {
		return fmt.Errorf("could not find interface %s: %v", ifaceName, err)
	}
	if err = nlh.LinkSetMaster(link,
		&netlink.Bridge{LinkAttrs: netlink.LinkAttrs{Name: bridgeName}}); err != nil {
		logrus.Debugf("Failed to add %s to bridge via netlink.Trying ioctl: %v", ifaceName, err)
		iface, err := net.InterfaceByName(ifaceName)
		if err != nil {
			return fmt.Errorf("could not find network interface %s: %v", ifaceName, err)
		}

		master, err := net.InterfaceByName(bridgeName)
		if err != nil {
			return fmt.Errorf("could not find bridge %s: %v", bridgeName, err)
		}

		return ioctlAddToBridge(iface, master)
	}
	return nil
}