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ifid.go
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ifid.go
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// Copyright 2017 ETH Zurich
// Copyright 2019 ETH Zurich, 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 ifid contains the Go representation of an IFID keepalive packet.
//
// IFID keepalive messages are sent from the beacon server on all links to the
// neighboring ASes using a one-hop path. The keepalive contains origin IFID
// which specifies the interface it was sent on. This allows beacon servers to
// discover the remote IFIDs of links, a crucial information for the beaconing
// process.
package ifid
import (
"fmt"
"github.com/scionproto/scion/go/lib/common"
"github.com/scionproto/scion/go/proto"
)
var _ proto.Cerealizable = (*IFID)(nil)
// IFID is the ifid keepalive message.
type IFID struct {
// OrigiIfid is the egress interface a keepalive was sent on.
OrigIfID common.IFIDType `capnp:"origIF"`
}
func NewFromRaw(b common.RawBytes) (*IFID, error) {
i := &IFID{}
return i, proto.ParseFromRaw(i, b)
}
func (i *IFID) ProtoId() proto.ProtoIdType {
return proto.IFID_TypeID
}
func (i *IFID) Write(b common.RawBytes) (int, error) {
return proto.WriteRoot(i, b)
}
func (i *IFID) String() string {
return fmt.Sprintf("OrigIfID: %d", i.OrigIfID)
}