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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 ClockedFilter struct {
NetworkFilter
upstream UpstreamFilter
downstream DownstreamFilter
nodeID int
prevExternalClock int
localClock float32
ratio float32
NetworkFilterFactory
clockAspectRatio map[int]float32
}
func MakeClockedFilter(ratio map[int]float32) *ClockedFilter {
return &ClockedFilter{
clockAspectRatio: ratio,
}
}
func (n *ClockedFilter) SendMessage(sourceNode, targetNode int, tag protocol.Tag, data []byte) {
n.downstream.SendMessage(sourceNode, targetNode, tag, data)
}
func (n *ClockedFilter) GetDownstreamFilter() DownstreamFilter {
return n.downstream
}
func (n *ClockedFilter) ReceiveMessage(sourceNode int, tag protocol.Tag, data []byte) {
n.upstream.ReceiveMessage(sourceNode, tag, data)
}
func (n *ClockedFilter) SetDownstreamFilter(f DownstreamFilter) {
n.downstream = f
}
func (n *ClockedFilter) SetUpstreamFilter(f UpstreamFilter) {
n.upstream = f
}
func (n *ClockedFilter) CreateFilter(nodeID int, fuzzer *Fuzzer) NetworkFilter {
f := &ClockedFilter{
nodeID: nodeID,
}
if ratio, has := n.clockAspectRatio[n.nodeID]; has {
f.ratio = ratio
if ratio <= 0.0 {
panic(fmt.Errorf("Invalid ratio specified (%v)", ratio))
}
} else {
f.ratio = 1.0
}
return f
}
func (n *ClockedFilter) Tick(newClockTime int) bool {
delta := newClockTime - n.prevExternalClock
n.localClock += float32(delta) * n.ratio
n.prevExternalClock = newClockTime
return n.upstream.Tick(int(n.localClock))
}
// Unmarshall ClockedFilter
func (n *ClockedFilter) Unmarshal(b []byte) NetworkFilterFactory {
type clockedFilterJSON struct {
Name string
ClockAspectRatio map[int]float32
}
var jsonConfig clockedFilterJSON
if err := json.Unmarshal(b, &jsonConfig); err != nil {
return nil
}
if jsonConfig.Name != "ClockedFilter" {
return nil
}
return &ClockedFilter{
clockAspectRatio: jsonConfig.ClockAspectRatio,
}
}
// register ClockedFilter
func init() {
registeredFilterFactories = append(registeredFilterFactories, &ClockedFilter{})
}
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