// Create a new controller instance
 controller := libnetwork.New()

 // This option is only needed for in-tree drivers. Plugins(in future) will get 
 // their options through plugin infrastructure.
 option := options.Generic{}
 driver, err := controller.NewNetworkDriver("simplebridge", option)
 if err != nil {
    return
 }

 netOptions := options.Generic{}
 // Create a network for containers to join.
 network, err := controller.NewNetwork(driver, "network1", netOptions)
 if err != nil {
    return
 }
 
 // For a new container: create a sandbox instance (providing a unique key).
 // For linux it is a filesystem path
 networkPath := "/var/lib/docker/.../4d23e"
 networkNamespace, err := sandbox.NewSandbox(networkPath)
 if err != nil {
    return
 }
 
 // For each new container: allocate IP and interfaces. The returned network
 // settings will be used for container infos (inspect and such), as well as
 // iptables rules for port publishing.
 _, sinfo, err := network.CreateEndpoint("Endpoint1", networkNamespace.Key(), "")
 if err != nil {
    return
 }
 
 // Add interfaces to the namespace.
 for _, iface := range sinfo.Interfaces {
     if err := networkNamespace.AddInterface(iface); err != nil {
     	    return
     }
 }
 
 // Set the gateway IP
 if err := networkNamespace.SetGateway(sinfo.Gateway); err != nil {
    return
 }