コード例 #1
0
ファイル: ops_linux.go プロジェクト: kjplatz/vic
func getDynamicIP(t Netlink, link netlink.Link, dc client.Client) (*dhcp.Packet, error) {
	var ack *dhcp.Packet
	var err error

	// use dhcp to acquire address
	id, err := client.NewID(link.Attrs().Index, link.Attrs().HardwareAddr)
	if err != nil {
		return nil, err
	}

	ack, err = dc.Request(id)
	if err != nil {
		log.Errorf("error sending dhcp request: %s", err)
		return nil, err
	}

	if ack.YourIP() == nil || ack.SubnetMask() == nil {
		err = fmt.Errorf("dhcp assigned nil ip or subnet mask")
		log.Error(err)
		return nil, err
	}

	log.Infof("DHCP response: IP=%s, SubnetMask=%s, Gateway=%s, DNS=%s, Lease Time=%s", ack.YourIP(), ack.SubnetMask(), ack.Gateway(), ack.DNS(), ack.LeaseTime())
	defer func() {
		if err != nil && ack != nil {
			dc.Release(ack)
		}
	}()

	return ack, nil
}