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reservation.go
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reservation.go
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package backend
import (
"fmt"
"math/big"
"net"
"github.com/digitalrebar/provision/backend/index"
"github.com/digitalrebar/provision/models"
"github.com/digitalrebar/store"
)
// Reservation tracks persistent DHCP IP address reservations.
//
// swagger:model
type Reservation struct {
*models.Reservation
validate
}
func (obj *Reservation) SetReadOnly(b bool) {
obj.ReadOnly = b
}
func (obj *Reservation) SaveClean() store.KeySaver {
mod := *obj.Reservation
mod.ClearValidation()
return toBackend(&mod, obj.rt)
}
func (l *Reservation) Indexes() map[string]index.Maker {
fix := AsReservation
res := index.MakeBaseIndexes(l)
res["Addr"] = index.Make(
false,
"IP Address",
func(i, j models.Model) bool {
n, o := big.Int{}, big.Int{}
n.SetBytes(fix(i).Addr.To16())
o.SetBytes(fix(j).Addr.To16())
return n.Cmp(&o) == -1
},
func(ref models.Model) (gte, gt index.Test) {
addr := &big.Int{}
addr.SetBytes(fix(ref).Addr.To16())
return func(s models.Model) bool {
o := big.Int{}
o.SetBytes(fix(s).Addr.To16())
return o.Cmp(addr) != -1
},
func(s models.Model) bool {
o := big.Int{}
o.SetBytes(fix(s).Addr.To16())
return o.Cmp(addr) == 1
}
},
func(s string) (models.Model, error) {
addr := net.ParseIP(s)
if addr == nil {
return nil, fmt.Errorf("Invalid Address: %s", s)
}
res := fix(l.New())
res.Addr = addr
return res, nil
})
res["Token"] = index.Make(
false,
"string",
func(i, j models.Model) bool { return fix(i).Token < fix(j).Token },
func(ref models.Model) (gte, gt index.Test) {
token := fix(ref).Token
return func(s models.Model) bool {
return fix(s).Token >= token
},
func(s models.Model) bool {
return fix(s).Token > token
}
},
func(s string) (models.Model, error) {
res := fix(l.New())
res.Token = s
return res, nil
})
res["Strategy"] = index.Make(
false,
"string",
func(i, j models.Model) bool { return fix(i).Strategy < fix(j).Strategy },
func(ref models.Model) (gte, gt index.Test) {
strategy := fix(ref).Strategy
return func(s models.Model) bool {
return fix(s).Strategy >= strategy
},
func(s models.Model) bool {
return fix(s).Strategy > strategy
}
},
func(s string) (models.Model, error) {
res := fix(l.New())
res.Strategy = s
return res, nil
})
res["NextServer"] = index.Make(
false,
"IP Address",
func(i, j models.Model) bool {
n, o := big.Int{}, big.Int{}
n.SetBytes(fix(i).NextServer.To16())
o.SetBytes(fix(j).NextServer.To16())
return n.Cmp(&o) == -1
},
func(ref models.Model) (gte, gt index.Test) {
addr := &big.Int{}
addr.SetBytes(fix(ref).NextServer.To16())
return func(s models.Model) bool {
o := big.Int{}
o.SetBytes(fix(s).NextServer.To16())
return o.Cmp(addr) != -1
},
func(s models.Model) bool {
o := big.Int{}
o.SetBytes(fix(s).NextServer.To16())
return o.Cmp(addr) == 1
}
},
func(s string) (models.Model, error) {
addr := net.ParseIP(s)
if addr == nil {
return nil, fmt.Errorf("Invalid Address: %s", s)
}
res := fix(l.New())
res.NextServer = addr
return res, nil
})
return res
}
func (r *Reservation) New() store.KeySaver {
res := &Reservation{Reservation: &models.Reservation{}}
if r.Reservation != nil && r.ChangeForced() {
res.ForceChange()
}
res.rt = r.rt
return res
}
func AsReservation(o models.Model) *Reservation {
return o.(*Reservation)
}
func AsReservations(o []models.Model) []*Reservation {
res := make([]*Reservation, len(o))
for i := range o {
res[i] = AsReservation(o[i])
}
return res
}
func (r *Reservation) OnChange(oldThing store.KeySaver) error {
old := AsReservation(oldThing)
if r.Token != old.Token {
r.Errorf("Token cannot change")
}
if r.Strategy != old.Strategy {
r.Errorf("Strategy cannot change")
}
return r.MakeError(422, ValidationError, r)
}
func (r *Reservation) OnCreate() error {
subnets := AsSubnets(r.rt.stores("subnets").Items())
for i := range subnets {
if !subnets[i].subnet().Contains(r.Addr) {
continue
}
if !subnets[i].InSubnetRange(r.Addr) {
r.Errorf("Address %s is a network or broadcast address for subnet %s", r.Addr.String(), subnets[i].Name)
}
break
}
return r.MakeError(422, ValidationError, r)
}
func (r *Reservation) Validate() {
validateIP4(r, r.Addr)
if r.NextServer != nil {
validateMaybeZeroIP4(r, r.NextServer)
}
if r.Token == "" {
r.Errorf("Reservation Token cannot be empty!")
}
if r.Strategy == "" {
r.Errorf("Reservation Strategy cannot be empty!")
}
reservations := AsReservations(r.rt.stores("reservations").Items())
for i := range reservations {
if reservations[i].Addr.Equal(r.Addr) {
continue
}
if reservations[i].Token == r.Token &&
reservations[i].Strategy == r.Strategy {
r.Errorf("Reservation %s alreay has Strategy %s: Token %s", reservations[i].Key(), r.Strategy, r.Token)
break
}
}
r.AddError(index.CheckUnique(r, r.rt.stores("reservations").Items()))
r.SetValid()
r.SetAvailable()
}
func (r *Reservation) BeforeSave() error {
r.Validate()
if !r.Useable() {
return r.MakeError(422, ValidationError, r)
}
return nil
}
func (r *Reservation) OnLoad() error {
defer func() { r.rt = nil }()
r.Fill()
return r.BeforeSave()
}
var reservationLockMap = map[string][]string{
"get": []string{"reservations"},
"create": []string{"reservations", "subnets"},
"update": []string{"reservations"},
"patch": []string{"reservations"},
"delete": []string{"reservations"},
"actions": []string{"reservations", "profiles", "params"},
}
func (r *Reservation) Locks(action string) []string {
return reservationLockMap[action]
}