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extn.go
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extn.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 extn
import (
"fmt"
"github.com/scionproto/scion/go/lib/common"
"github.com/scionproto/scion/go/proto"
)
type Extension interface {
Pack() (common.RawBytes, error)
CtrlExtnType() common.RawBytes
proto.Cerealizable
}
var _ proto.Cerealizable = (*CtrlExtnDataList)(nil)
type CtrlExtnDataList struct {
Items []*CtrlExtnData
}
func NewCtrlExtnDataListFromValues(items []*CtrlExtnData) *CtrlExtnDataList {
return &CtrlExtnDataList{Items: items}
}
func NewCtrlExtnDataListFromRaw(b common.RawBytes) (*CtrlExtnDataList, error) {
edl := &CtrlExtnDataList{}
return edl, proto.ParseFromRaw(edl, b)
}
func (edl *CtrlExtnDataList) ProtoId() proto.ProtoIdType {
return proto.CtrlExtnDataList_TypeID
}
func (edl *CtrlExtnDataList) Write(b common.RawBytes) (int, error) {
return proto.WriteRoot(edl, b)
}
func (edl *CtrlExtnDataList) String() string {
return fmt.Sprintf("Items: %v", edl.Items)
}
var _ proto.Cerealizable = (*CtrlExtnData)(nil)
type CtrlExtnData struct {
Type common.RawBytes
Data common.RawBytes
}
func NewCtrlExtnDataFromValues(e Extension, arenaSize int) (*CtrlExtnData, error) {
raw, err := e.Pack()
if err != nil {
return nil, common.NewBasicError("Unable to pack extension", err, "extn", e)
}
return &CtrlExtnData{Type: e.CtrlExtnType(), Data: raw}, nil
}
func NewCtrlExtnDataFromRaw(b common.RawBytes) (*CtrlExtnData, error) {
ed := &CtrlExtnData{}
return ed, proto.ParseFromRaw(ed, b)
}
func (ed *CtrlExtnData) ProtoId() proto.ProtoIdType {
return proto.CtrlExtnData_TypeID
}
func (ed *CtrlExtnData) Write(b common.RawBytes) (int, error) {
return proto.WriteRoot(ed, b)
}
func (ed *CtrlExtnData) TypeStr() string {
return string(ed.Type)
}
func (ed *CtrlExtnData) String() string {
return fmt.Sprintf("Type: %v, Data length: %v", ed.Type, len(ed.Data))
}