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interfaces.go
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/
interfaces.go
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/*
* Copyright 2018 Insolar
*
* 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 packets
import (
"io"
"strconv"
"github.com/pkg/errors"
"github.com/insolar/insolar/core"
"github.com/insolar/insolar/network/transport/packet/types"
)
type RoutingHeader struct {
OriginID core.ShortNodeID
TargetID core.ShortNodeID
PacketType types.PacketType
}
type PacketRoutable interface {
// SetPacketHeader set routing information for transport level.
SetPacketHeader(header *RoutingHeader) error
// GetPacketHeader get routing information from transport level.
GetPacketHeader() (*RoutingHeader, error)
}
type Serializer interface {
Serialize() ([]byte, error)
Deserialize(data io.Reader) error
}
type HeaderSkipDeserializer interface {
DeserializeWithoutHeader(data io.Reader, header *PacketHeader) error
}
type ConsensusPacket interface {
HeaderSkipDeserializer
Serializer
PacketRoutable
}
func ExtractPacket(reader io.Reader) (ConsensusPacket, error) {
header := PacketHeader{}
err := header.Deserialize(reader)
if err != nil {
return nil, errors.New("[ ExtractPacket ] Can't read packet header")
}
var packet ConsensusPacket
switch header.PacketT {
case Phase1:
packet = &Phase1Packet{}
case Phase2:
packet = &Phase2Packet{}
default:
return nil, errors.New("[ ExtractPacket ] Unknown extract packet type. " + strconv.Itoa(int(header.PacketT)))
}
err = packet.DeserializeWithoutHeader(reader, &header)
if err != nil {
return nil, errors.Wrap(err, "[ ExtractPacket ] Can't DeserializeWithoutHeader packet2")
}
return packet, nil
}