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// Copyright 2018 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
// You can run this simulation using
//
// go run ./swarm/network/simulations/overlay.go
package main
import (
"flag"
"fmt"
"net/http"
"runtime"
"sync"
"time"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/node"
"github.com/ethereum/go-ethereum/p2p/enode"
"github.com/ethereum/go-ethereum/p2p/simulations"
"github.com/ethereum/go-ethereum/p2p/simulations/adapters"
"github.com/ethereum/go-ethereum/swarm/network"
"github.com/ethereum/go-ethereum/swarm/state"
colorable "github.com/mattn/go-colorable"
)
var (
noDiscovery = flag.Bool("no-discovery", false, "disable discovery (useful if you want to load a snapshot)")
vmodule = flag.String("vmodule", "", "log filters for logger via Vmodule")
verbosity = flag.Int("verbosity", 0, "log filters for logger via Vmodule")
httpSimPort = 8888
)
func init() {
flag.Parse()
//initialize the logger
//this is a demonstration on how to use Vmodule for filtering logs
//provide -vmodule as param, and comma-separated values, e.g.:
//-vmodule overlay_test.go=4,simulations=3
//above examples sets overlay_test.go logs to level 4, while packages ending with "simulations" to 3
if *vmodule != "" {
//only enable the pattern matching handler if the flag has been provided
glogger := log.NewGlogHandler(log.StreamHandler(colorable.NewColorableStderr(), log.TerminalFormat(true)))
if *verbosity > 0 {
glogger.Verbosity(log.Lvl(*verbosity))
}
glogger.Vmodule(*vmodule)
log.Root().SetHandler(glogger)
}
}
type Simulation struct {
mtx sync.Mutex
stores map[enode.ID]state.Store
}
func NewSimulation() *Simulation {
return &Simulation{
stores: make(map[enode.ID]state.Store),
}
}
func (s *Simulation) NewService(ctx *adapters.ServiceContext) (node.Service, error) {
node := ctx.Config.Node()
s.mtx.Lock()
store, ok := s.stores[node.ID()]
if !ok {
store = state.NewInmemoryStore()
s.stores[node.ID()] = store
}
s.mtx.Unlock()
addr := network.NewAddr(node)
kp := network.NewKadParams()
kp.NeighbourhoodSize = 2
kp.MaxBinSize = 4
kp.MinBinSize = 1
kp.MaxRetries = 1000
kp.RetryExponent = 2
kp.RetryInterval = 1000000
kad := network.NewKademlia(addr.Over(), kp)
hp := network.NewHiveParams()
hp.Discovery = !*noDiscovery
hp.KeepAliveInterval = 300 * time.Millisecond
config := &network.BzzConfig{
OverlayAddr: addr.Over(),
UnderlayAddr: addr.Under(),
HiveParams: hp,
}
return network.NewBzz(config, kad, store, nil, nil), nil
}
//create the simulation network
func newSimulationNetwork() *simulations.Network {
s := NewSimulation()
services := adapters.Services{
"overlay": s.NewService,
}
adapter := adapters.NewSimAdapter(services)
simNetwork := simulations.NewNetwork(adapter, &simulations.NetworkConfig{
DefaultService: "overlay",
})
return simNetwork
}
//return a new http server
func newOverlaySim(sim *simulations.Network) *simulations.Server {
return simulations.NewServer(sim)
}
// var server
func main() {
//cpu optimization
runtime.GOMAXPROCS(runtime.NumCPU())
//run the sim
runOverlaySim()
}
func runOverlaySim() {
//create the simulation network
net := newSimulationNetwork()
//create a http server with it
sim := newOverlaySim(net)
log.Info(fmt.Sprintf("starting simulation server on 0.0.0.0:%d...", httpSimPort))
//start the HTTP server
http.ListenAndServe(fmt.Sprintf(":%d", httpSimPort), sim)
}
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