package driverapi import ( "encoding/json" "fmt" "net" "github.com/docker/libnetwork/types" ) // MarshalJSON encodes IPAMData into json message func (i *IPAMData) MarshalJSON() ([]byte, error) { m := map[string]interface{}{} m["AddressSpace"] = i.AddressSpace if i.Pool != nil { m["Pool"] = i.Pool.String() } if i.Gateway != nil { m["Gateway"] = i.Gateway.String() } if i.AuxAddresses != nil { am := make(map[string]string, len(i.AuxAddresses)) for k, v := range i.AuxAddresses { am[k] = v.String() } m["AuxAddresses"] = am } return json.Marshal(m) } // UnmarshalJSON decodes a json message into IPAMData func (i *IPAMData) UnmarshalJSON(data []byte) error { var ( m map[string]interface{} err error ) if err := json.Unmarshal(data, &m); err != nil { return err } i.AddressSpace = m["AddressSpace"].(string) if v, ok := m["Pool"]; ok { if i.Pool, err = types.ParseCIDR(v.(string)); err != nil { return err } } if v, ok := m["Gateway"]; ok { if i.Gateway, err = types.ParseCIDR(v.(string)); err != nil { return err } } if v, ok := m["AuxAddresses"]; ok { b, _ := json.Marshal(v) var am map[string]string if err = json.Unmarshal(b, &am); err != nil { return err } i.AuxAddresses = make(map[string]*net.IPNet, len(am)) for k, v := range am { if i.AuxAddresses[k], err = types.ParseCIDR(v); err != nil { return err } } } return nil } // Validate checks wheter the IPAMData structure contains congruent data func (i *IPAMData) Validate() error { var isV6 bool if i.Pool == nil { return types.BadRequestErrorf("invalid pool") } if i.Gateway == nil { return types.BadRequestErrorf("invalid gateway address") } isV6 = i.IsV6() if isV6 && i.Gateway.IP.To4() != nil || !isV6 && i.Gateway.IP.To4() == nil { return types.BadRequestErrorf("incongruent ip versions for pool and gateway") } for k, sip := range i.AuxAddresses { if isV6 && sip.IP.To4() != nil || !isV6 && sip.IP.To4() == nil { return types.BadRequestErrorf("incongruent ip versions for pool and secondary ip address %s", k) } } if !i.Pool.Contains(i.Gateway.IP) { return types.BadRequestErrorf("invalid gateway address (%s) does not belong to the pool (%s)", i.Gateway, i.Pool) } for k, sip := range i.AuxAddresses { if !i.Pool.Contains(sip.IP) { return types.BadRequestErrorf("invalid secondary address %s (%s) does not belong to the pool (%s)", k, i.Gateway, i.Pool) } } return nil } // IsV6 returns wheter this is an IPv6 IPAMData structure func (i *IPAMData) IsV6() bool { return nil == i.Pool.IP.To4() } func (i *IPAMData) String() string { return fmt.Sprintf("AddressSpace: %s\nPool: %v\nGateway: %v\nAddresses: %v", i.AddressSpace, i.Pool, i.Gateway, i.AuxAddresses) }