func (a *Allocator) getAddress(nw *net.IPNet, bitmask *bitseq.Handle, prefAddress net.IP, ipr *AddressRange) (net.IP, error) {
var (
ordinal uint64
err error
base *net.IPNet
)
base = types.GetIPNetCopy(nw)
if bitmask.Unselected() <= 0 {
return nil, ipamapi.ErrNoAvailableIPs
}
if ipr == nil && prefAddress == nil {
ordinal, err = bitmask.SetAny()
} else if prefAddress != nil {
hostPart, e := types.GetHostPartIP(prefAddress, base.Mask)
if e != nil {
return nil, fmt.Errorf("failed to allocate preferred address %s: %v", prefAddress.String(), e)
}
ordinal = ipToUint64(types.GetMinimalIP(hostPart))
err = bitmask.Set(ordinal)
} else {
base.IP = ipr.Sub.IP
ordinal, err = bitmask.SetAnyInRange(ipr.Start, ipr.End)
}
if err != nil {
return nil, ipamapi.ErrNoAvailableIPs
}
// Convert IP ordinal for this subnet into IP address
return generateAddress(ordinal, base), nil
}
func (a *Allocator) getAddress(nw *net.IPNet, bitmask *bitseq.Handle, prefAddress net.IP, ipr *AddressRange) (net.IP, error) {
var (
ordinal uint64
err error
base *net.IPNet
)
base = types.GetIPNetCopy(nw)
if bitmask.Unselected() <= 0 {
return nil, ipamapi.ErrNoAvailableIPs
}
if ipr == nil && prefAddress == nil {
ordinal, err = bitmask.SetAny()
} else if prefAddress != nil {
hostPart, e := types.GetHostPartIP(prefAddress, base.Mask)
if e != nil {
return nil, types.InternalErrorf("failed to allocate requested address %s: %v", prefAddress.String(), e)
}
ordinal = ipToUint64(types.GetMinimalIP(hostPart))
err = bitmask.Set(ordinal)
} else {
ordinal, err = bitmask.SetAnyInRange(ipr.Start, ipr.End)
}
switch err {
case nil:
// Convert IP ordinal for this subnet into IP address
return generateAddress(ordinal, base), nil
case bitseq.ErrBitAllocated:
return nil, ipamapi.ErrIPAlreadyAllocated
case bitseq.ErrNoBitAvailable:
return nil, ipamapi.ErrNoAvailableIPs
default:
return nil, err
}
}