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// Copyright (C) 2019-2024 Algorand, Inc.
// This file is part of go-algorand
//
// go-algorand is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// go-algorand is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with go-algorand. If not, see <https://www.gnu.org/licenses/>.
package fuzzer
import (
"encoding/json"
"fmt"
"github.com/algorand/go-algorand/protocol"
)
type NodeCrashFilterConfig struct {
Nodes []int
Count int
}
type NodeCrashFilter struct {
NetworkFilter
upstream UpstreamFilter
downstream DownstreamFilter
fuzzer *Fuzzer
nodeID int
count int
enabled bool
debugMessages bool
NetworkFilterFactory
config *NodeCrashFilterConfig
}
func (n *NodeCrashFilter) SendMessage(sourceNode, targetNode int, tag protocol.Tag, data []byte) {
n.downstream.SendMessage(sourceNode, targetNode, tag, data)
}
func (n *NodeCrashFilter) GetDownstreamFilter() DownstreamFilter {
return n.downstream
}
func (n *NodeCrashFilter) ReceiveMessage(sourceNode int, tag protocol.Tag, data []byte) {
n.upstream.ReceiveMessage(sourceNode, tag, data)
}
func (n *NodeCrashFilter) SetDownstreamFilter(f DownstreamFilter) {
n.downstream = f
}
func (n *NodeCrashFilter) SetUpstreamFilter(f UpstreamFilter) {
n.upstream = f
}
func (n *NodeCrashFilter) CreateFilter(nodeID int, fuzzer *Fuzzer) NetworkFilter {
f := &NodeCrashFilter{
nodeID: nodeID,
fuzzer: fuzzer,
config: n.config,
debugMessages: false,
}
for _, i := range n.config.Nodes {
if i == nodeID {
f.enabled = true
}
}
return f
}
func (n *NodeCrashFilter) Tick(newClockTime int) bool {
changed := n.upstream.Tick(newClockTime)
if !n.enabled {
return changed
}
if n.debugMessages {
fmt.Printf("Node %d Tick %d crashing node\n", n.nodeID, newClockTime)
}
n.fuzzer.CrashNode(n.nodeID)
n.fuzzer.facades[n.nodeID].Tick(newClockTime)
n.count++
if n.count >= n.config.Count {
n.enabled = false
}
return true
}
func MakeNodeCrashFilterFactory(config *NodeCrashFilterConfig) *NodeCrashFilter {
return &NodeCrashFilter{
config: config,
}
}
// Unmarshall NodeCrashFilter
func (n *NodeCrashFilter) Unmarshal(b []byte) NetworkFilterFactory {
type catchupFilterJSON struct {
Name string
NodeCrashFilterConfig
}
var jsonConfig catchupFilterJSON
if err := json.Unmarshal(b, &jsonConfig); err != nil {
return nil
}
if jsonConfig.Name != "NodeCrashFilter" {
return nil
}
return MakeNodeCrashFilterFactory(&jsonConfig.NodeCrashFilterConfig)
}
// register NodeCrashFilter
func init() {
registeredFilterFactories = append(registeredFilterFactories, &NodeCrashFilter{})
}
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