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claim_serializers.go
310 lines (255 loc) · 9.37 KB
/
claim_serializers.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 (
"bytes"
"encoding/binary"
"fmt"
"io"
"github.com/pkg/errors"
)
// claims auxiliar constants
const (
claimTypeShift = 10
claimHeaderTypeMask = 0xfc00
// claimHeaderLengthMask = 0x3ff
)
func extractClaimTypeFromHeader(claimHeader uint16) uint8 {
return uint8((claimHeader & claimHeaderTypeMask) >> claimTypeShift)
}
// func extractClaimLengthFromHeader(claimHeader uint16) uint16 {
// return claimHeader & claimHeaderLengthMask
// }
func makeClaimHeader(claim ReferendumClaim) uint16 {
if claim == nil {
panic("invalid claim")
}
var result = getClaimSize(claim)
result |= uint16(claim.Type()) << claimTypeShift
return result
}
// Deserialize implements interface method
func (nb *NodeBroadcast) Deserialize(data io.Reader) error {
err := binary.Read(data, defaultByteOrder, &nb.EmergencyLevel)
if err != nil {
return errors.Wrap(err, "[ NodeBroadcast.Deserialize ] Can't read EmergencyLevel")
}
return nil
}
// Serialize implements interface method
func (nb *NodeBroadcast) Serialize() ([]byte, error) {
result := allocateBuffer(64)
err := binary.Write(result, defaultByteOrder, nb.EmergencyLevel)
if err != nil {
return nil, errors.Wrap(err, "[ NodeBroadcast.Serialize ] Can't write EmergencyLevel")
}
return result.Bytes(), nil
}
// Deserialize implements interface method
func (cpa *CapabilityPoolingAndActivation) Deserialize(data io.Reader) error {
err := binary.Read(data, defaultByteOrder, &cpa.PollingFlags)
if err != nil {
return errors.Wrap(err, "[ NodeBroadcast.Deserialize ] Can't read PollingFlags")
}
err = binary.Read(data, defaultByteOrder, &cpa.CapabilityType)
if err != nil {
return errors.Wrap(err, "[ CapabilityPoolingAndActivation.Deserialize ] Can't read CapabilityType")
}
err = binary.Read(data, defaultByteOrder, &cpa.CapabilityRef)
if err != nil {
return errors.Wrap(err, "[ CapabilityPoolingAndActivation.Deserialize ] Can't read CapabilityRef")
}
return nil
}
// Serialize implements interface method
func (cpa *CapabilityPoolingAndActivation) Serialize() ([]byte, error) {
result := allocateBuffer(128)
err := binary.Write(result, defaultByteOrder, cpa.PollingFlags)
if err != nil {
return nil, errors.Wrap(err, "[ CapabilityPoolingAndActivation.Serialize ] Can't write PollingFlags")
}
err = binary.Write(result, defaultByteOrder, cpa.CapabilityType)
if err != nil {
return nil, errors.Wrap(err, "[ CapabilityPoolingAndActivation.Serialize ] Can't write CapabilityType")
}
err = binary.Write(result, defaultByteOrder, cpa.CapabilityRef)
if err != nil {
return nil, errors.Wrap(err, "[ CapabilityPoolingAndActivation.Serialize ] Can't write CapabilityRef")
}
return result.Bytes(), nil
}
// Deserialize implements interface method
func (nvb *NodeViolationBlame) Deserialize(data io.Reader) error {
err := binary.Read(data, defaultByteOrder, &nvb.BlameNodeID)
if err != nil {
return errors.Wrap(err, "[ NodeViolationBlame.Deserialize ] Can't read BlameNodeID")
}
err = binary.Read(data, defaultByteOrder, &nvb.TypeViolation)
if err != nil {
return errors.Wrap(err, "[ NodeViolationBlame.Deserialize ] Can't read TypeViolation")
}
return nil
}
// Serialize implements interface method
func (nvb *NodeViolationBlame) Serialize() ([]byte, error) {
result := allocateBuffer(64)
err := binary.Write(result, defaultByteOrder, nvb.BlameNodeID)
if err != nil {
return nil, errors.Wrap(err, "[ NodeViolationBlame.Serialize ] Can't write BlameNodeID")
}
err = binary.Write(result, defaultByteOrder, nvb.TypeViolation)
if err != nil {
return nil, errors.Wrap(err, "[ NodeViolationBlame.Serialize ] Can't write TypeViolation")
}
return result.Bytes(), nil
}
// Deserialize implements interface method
func (njc *NodeJoinClaim) Deserialize(data io.Reader) error {
err := binary.Read(data, defaultByteOrder, &njc.NodeID)
if err != nil {
return errors.Wrap(err, "[ NodeJoinClaim.Deserialize ] Can't read NodeID")
}
err = binary.Read(data, defaultByteOrder, &njc.RelayNodeID)
if err != nil {
return errors.Wrap(err, "[ NodeJoinClaim.Deserialize ] Can't read RelayNodeID")
}
err = binary.Read(data, defaultByteOrder, &njc.ProtocolVersionAndFlags)
if err != nil {
return errors.Wrap(err, "[ NodeJoinClaim.Deserialize ] Can't read ProtocolVersionAndFlags")
}
err = binary.Read(data, defaultByteOrder, &njc.JoinsAfter)
if err != nil {
return errors.Wrap(err, "[ NodeJoinClaim.Deserialize ] Can't read JoinsAfter")
}
err = binary.Read(data, defaultByteOrder, &njc.NodeRoleRecID)
if err != nil {
return errors.Wrap(err, "[ NodeJoinClaim.Deserialize ] Can't read NodeRoleRecID")
}
err = binary.Read(data, defaultByteOrder, &njc.NodeRef)
if err != nil {
return errors.Wrap(err, "[ NodeJoinClaim.Deserialize ] Can't read NodeRef")
}
err = binary.Read(data, defaultByteOrder, &njc.NodePK)
if err != nil {
return errors.Wrap(err, "[ NodeJoinClaim.Deserialize ] Can't read NodePK")
}
return nil
}
// Serialize implements interface method
func (njc *NodeJoinClaim) Serialize() ([]byte, error) {
result := allocateBuffer(1024)
err := binary.Write(result, defaultByteOrder, njc.NodeID)
if err != nil {
return nil, errors.Wrap(err, "[ NodeJoinClaim.Serialize ] Can't write NodeID")
}
err = binary.Write(result, defaultByteOrder, njc.RelayNodeID)
if err != nil {
return nil, errors.Wrap(err, "[ NodeJoinClaim.Serialize ] Can't write RelayNodeID")
}
err = binary.Write(result, defaultByteOrder, njc.ProtocolVersionAndFlags)
if err != nil {
return nil, errors.Wrap(err, "[ NodeJoinClaim.Serialize ] Can't write ProtocolVersionAndFlags")
}
err = binary.Write(result, defaultByteOrder, njc.JoinsAfter)
if err != nil {
return nil, errors.Wrap(err, "[ NodeJoinClaim.Serialize ] Can't write JoinsAfter")
}
err = binary.Write(result, defaultByteOrder, njc.NodeRoleRecID)
if err != nil {
return nil, errors.Wrap(err, "[ NodeJoinClaim.Serialize ] Can't write NodeRoleRecID")
}
err = binary.Write(result, defaultByteOrder, njc.NodeRef)
if err != nil {
return nil, errors.Wrap(err, "[ NodeJoinClaim.Serialize ] Can't write NodeRef")
}
err = binary.Write(result, defaultByteOrder, njc.NodePK)
if err != nil {
return nil, errors.Wrap(err, "[ NodeJoinClaim.Serialize ] Can't write NodePK")
}
return result.Bytes(), nil
}
// Deserialize implements interface method
func (nlc *NodeLeaveClaim) Deserialize(data io.Reader) error {
return nil
}
// Serialize implements interface method
func (nlc *NodeLeaveClaim) Serialize() ([]byte, error) {
return nil, nil
}
func serializeClaims(claims []ReferendumClaim) ([]byte, error) {
result := allocateBuffer(2048)
for _, claim := range claims {
claimHeader := makeClaimHeader(claim)
err := binary.Write(result, defaultByteOrder, claimHeader)
if err != nil {
return nil, errors.Wrap(err, fmt.Sprintf("[ serializeClaims ] "+
"Can't write claim header. Type: %d. Length: %d", claim.Type(), getClaimSize(claim)))
}
rawClaim, err := claim.Serialize()
if err != nil {
return nil, errors.Wrap(err, fmt.Sprintf("[ serializeClaims ] "+
"Can't serialize claim. Type: %d. Length: %d", claim.Type(), getClaimSize(claim)))
}
_, err = result.Write(rawClaim)
if err != nil {
return nil, errors.Wrap(err, fmt.Sprintf("[ serializeClaims ] "+
"Can't append proofNodePulseRaw."+"Type: %d. Length: %d", claim.Type(), getClaimSize(claim)))
}
}
return result.Bytes(), nil
}
func parseReferendumClaim(data []byte) ([]ReferendumClaim, error) {
claimsSize := len(data)
claimsBufReader := bytes.NewReader(data)
result := make([]ReferendumClaim, 0)
// get claim header
for claimsSize > 0 {
startSize := claimsBufReader.Len()
var claimHeader uint16
err := binary.Read(claimsBufReader, defaultByteOrder, &claimHeader)
if err != nil {
return nil, errors.Wrap(err, "[ PacketHeader.parseReferendumClaim ] Can't read claimHeader")
}
claimType := ClaimType(extractClaimTypeFromHeader(claimHeader))
// TODO: Do we need claimLength?
// claimLength := extractClaimLengthFromHeader(claimHeader)
var refClaim ReferendumClaim
switch claimType {
case TypeNodeJoinClaim:
refClaim = &NodeJoinClaim{}
case TypeCapabilityPollingAndActivation:
refClaim = &CapabilityPoolingAndActivation{}
case TypeNodeViolationBlame:
refClaim = &NodeViolationBlame{}
case TypeNodeBroadcast:
refClaim = &NodeBroadcast{}
case TypeNodeLeaveClaim:
refClaim = &NodeLeaveClaim{}
default:
return nil, errors.Wrap(err, "[ PacketHeader.parseReferendumClaim ] Unsupported claim type.")
}
err = refClaim.Deserialize(claimsBufReader)
if err != nil {
return nil, errors.Wrap(err, "[ PacketHeader.parseReferendumClaim ] Can't deserialize claim")
}
result = append(result, refClaim)
claimsSize -= startSize - claimsBufReader.Len()
}
if claimsSize != 0 {
return nil, errors.New("[ PacketHeader.parseReferendumClaim ] Problem with claims struct")
}
return result, nil
}