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store.go
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store.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 hiddenpath
import (
"context"
"github.com/scionproto/scion/pkg/addr"
"github.com/scionproto/scion/pkg/private/serrors"
seg "github.com/scionproto/scion/pkg/segment"
"github.com/scionproto/scion/private/pathdb"
"github.com/scionproto/scion/private/pathdb/query"
)
// Store is the interface to the hidden segment database.
type Store interface {
// Get gets the segments that end at the given IA and are in one of the given
// hidden path groups.
Get(context.Context, addr.IA, []GroupID) ([]*seg.Meta, error)
// Put puts the given segments in the database and associates them with the
// given hidden path group ID.
Put(context.Context, []*seg.Meta, GroupID) error
}
// Storer implements the path DB interface for a hidden segments.
type Storer struct {
DB pathdb.DB
}
// Get returns segments from the store using a db provider.
func (s *Storer) Get(ctx context.Context, ia addr.IA,
groups []GroupID) ([]*seg.Meta, error) {
res, err := s.DB.Get(ctx, &query.Params{
EndsAt: []addr.IA{ia},
HPGroupIDs: convert(groups),
})
if err != nil {
return nil, err
}
return res.SegMetas(), nil
}
// Put stores segments in the store using a db provider.
func (s *Storer) Put(ctx context.Context, segs []*seg.Meta, g GroupID) error {
var errs serrors.List
for _, seg := range segs {
_, e := s.DB.InsertWithHPGroupIDs(ctx, seg, convert([]GroupID{g}))
if e != nil {
errs = append(errs, e)
}
}
return errs.ToError()
}
func convert(ids []GroupID) (ret []uint64) {
for _, id := range ids {
ret = append(ret, id.ToUint64())
}
return
}