// Package null implements the null ipam driver. Null ipam driver satisfies ipamapi contract, // but does not effectively reserve/allocate any address pool or address package null import ( "fmt" "net" "github.com/docker/docker/libnetwork/discoverapi" "github.com/docker/docker/libnetwork/ipamapi" "github.com/docker/docker/libnetwork/types" ) var ( defaultAS = "null" defaultPool, _ = types.ParseCIDR("0.0.0.0/0") defaultPoolID = fmt.Sprintf("%s/%s", defaultAS, defaultPool.String()) ) type allocator struct{} func (a *allocator) GetDefaultAddressSpaces() (string, string, error) { return defaultAS, defaultAS, nil } func (a *allocator) RequestPool(addressSpace, pool, subPool string, options map[string]string, v6 bool) (string, *net.IPNet, map[string]string, error) { if addressSpace != defaultAS { return "", nil, nil, types.BadRequestErrorf("unknown address space: %s", addressSpace) } if pool != "" { return "", nil, nil, types.BadRequestErrorf("null ipam driver does not handle specific address pool requests") } if subPool != "" { return "", nil, nil, types.BadRequestErrorf("null ipam driver does not handle specific address subpool requests") } if v6 { return "", nil, nil, types.BadRequestErrorf("null ipam driver does not handle IPv6 address pool pool requests") } return defaultPoolID, defaultPool, nil, nil } func (a *allocator) ReleasePool(poolID string) error { return nil } func (a *allocator) RequestAddress(poolID string, ip net.IP, opts map[string]string) (*net.IPNet, map[string]string, error) { if poolID != defaultPoolID { return nil, nil, types.BadRequestErrorf("unknown pool id: %s", poolID) } return nil, nil, nil } func (a *allocator) ReleaseAddress(poolID string, ip net.IP) error { if poolID != defaultPoolID { return types.BadRequestErrorf("unknown pool id: %s", poolID) } return nil } func (a *allocator) DiscoverNew(dType discoverapi.DiscoveryType, data interface{}) error { return nil } func (a *allocator) DiscoverDelete(dType discoverapi.DiscoveryType, data interface{}) error { return nil } func (a *allocator) IsBuiltIn() bool { return true } // Init registers a remote ipam when its plugin is activated func Init(ic ipamapi.Callback, l, g interface{}) error { return ic.RegisterIpamDriver(ipamapi.NullIPAM, &allocator{}) }