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moby--moby/vendor/github.com/docker/libnetwork/driverapi/ipamdata.go

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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 whether 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 whether 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)
}