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extensions.go
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extensions.go
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// Copyright 2020 Anapaya Systems
//
// 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 segment
import (
cppb "github.com/scionproto/scion/pkg/proto/control_plane"
"github.com/scionproto/scion/pkg/segment/extensions/digest"
"github.com/scionproto/scion/pkg/segment/extensions/staticinfo"
)
type Extensions struct {
HiddenPath HiddenPathExtension
StaticInfo *staticinfo.Extension
Digests *digest.Extension
}
func extensionsFromPB(pb *cppb.PathSegmentExtensions) Extensions {
if pb == nil {
return Extensions{}
}
hiddenPath := HiddenPathExtension{
IsHidden: pb.HiddenPath != nil && pb.HiddenPath.IsHidden,
}
staticInfo := staticinfo.FromPB(pb.StaticInfo)
digest := digest.ExtensionFromPB(pb.Digests)
return Extensions{
HiddenPath: hiddenPath,
StaticInfo: staticInfo,
Digests: digest,
}
}
func extensionsToPB(ext Extensions) *cppb.PathSegmentExtensions {
var hiddenPath *cppb.HiddenPathExtension
if ext.HiddenPath.IsHidden {
hiddenPath = &cppb.HiddenPathExtension{IsHidden: true}
}
staticInfo := staticinfo.ToPB(ext.StaticInfo)
digest := digest.ExtensionToPB(ext.Digests)
if hiddenPath != nil || staticInfo != nil || digest != nil {
return &cppb.PathSegmentExtensions{
HiddenPath: hiddenPath,
StaticInfo: staticInfo,
Digests: digest,
}
}
return nil
}