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pld.go
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pld.go
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// Copyright 2017 ETH Zurich
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package mgmt
import (
"fmt"
"strings"
"time"
"github.com/scionproto/scion/go/lib/common"
"github.com/scionproto/scion/go/proto"
)
type MsgIdType uint64
func (m MsgIdType) String() string {
return fmt.Sprintf("0x%016x", uint64(m))
}
func (m MsgIdType) Time() time.Time {
return time.Unix(int64(m)/1000000000, int64(m)%1000000000)
}
// union represents the contents of the unnamed capnp union.
type union struct {
Which proto.SIGCtrl_Which
PollReq *PollReq
PollRep *PollRep
}
func (u *union) set(c proto.Cerealizable) error {
switch p := c.(type) {
case *PollReq:
u.Which = proto.SIGCtrl_Which_pollReq
u.PollReq = p
case *PollRep:
u.Which = proto.SIGCtrl_Which_pollRep
u.PollRep = p
default:
return common.NewBasicError("Unsupported SIG ctrl union type (set)", nil,
"type", common.TypeOf(c))
}
return nil
}
func (u *union) get() (proto.Cerealizable, error) {
switch u.Which {
case proto.SIGCtrl_Which_pollReq:
return u.PollReq, nil
case proto.SIGCtrl_Which_pollRep:
return u.PollRep, nil
}
return nil, common.NewBasicError("Unsupported SIG ctrl union type (get)", nil,
"type", u.Which)
}
var _ proto.Cerealizable = (*Pld)(nil)
type Pld struct {
Id MsgIdType
union
}
// NewPld creates a new SIG ctrl payload, containing the supplied Cerealizable instance.
func NewPld(id MsgIdType, u proto.Cerealizable) (*Pld, error) {
p := &Pld{Id: id}
return p, p.union.set(u)
}
func (p *Pld) Union() (proto.Cerealizable, error) {
return p.union.get()
}
func (p *Pld) ProtoId() proto.ProtoIdType {
return proto.SIGCtrl_TypeID
}
func (p *Pld) String() string {
desc := []string{fmt.Sprintf("SIGCtrl: Id: %s Union:", p.Id)}
u, err := p.Union()
if err != nil {
desc = append(desc, err.Error())
} else {
desc = append(desc, fmt.Sprintf("%+v", u))
}
return strings.Join(desc, " ")
}