102 lines
3.1 KiB
Go
102 lines
3.1 KiB
Go
// Copyright 2016 The go-ethereum Authors
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// This file is part of go-ethereum.
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//
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// go-ethereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// go-ethereum is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
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// bootnode runs a bootstrap node for the Ethereum Discovery Protocol.
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package main
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import (
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"flag"
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"fmt"
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"math/rand"
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"strconv"
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"time"
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"github.com/ethereum/go-ethereum/cmd/utils"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/logger/glog"
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"github.com/ethereum/go-ethereum/p2p/discv5"
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"github.com/ethereum/go-ethereum/p2p/nat"
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)
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func main() {
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var (
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listenPort = flag.Int("addr", 31000, "beginning of listening port range")
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natdesc = flag.String("nat", "none", "port mapping mechanism (any|none|upnp|pmp|extip:<IP>)")
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count = flag.Int("count", 1, "number of v5 topic discovery test nodes (adds default bootnodes to form a test network)")
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regtopic = flag.String("reg", "", "topic to register on the network")
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looktopic = flag.String("search", "", "topic to search on the network")
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)
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flag.Var(glog.GetVerbosity(), "verbosity", "log verbosity (0-9)")
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flag.Var(glog.GetVModule(), "vmodule", "log verbosity pattern")
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glog.SetToStderr(true)
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flag.Parse()
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natm, err := nat.Parse(*natdesc)
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if err != nil {
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utils.Fatalf("-nat: %v", err)
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}
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for i := 0; i < *count; i++ {
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listenAddr := ":" + strconv.Itoa(*listenPort+i)
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nodeKey, err := crypto.GenerateKey()
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if err != nil {
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utils.Fatalf("could not generate key: %v", err)
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}
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if net, err := discv5.ListenUDP(nodeKey, listenAddr, natm, ""); err != nil {
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utils.Fatalf("%v", err)
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} else {
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if err := net.SetFallbackNodes(discv5.BootNodes); err != nil {
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utils.Fatalf("%v", err)
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}
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go func() {
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if *looktopic == "" {
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for i := 0; i < 20; i++ {
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time.Sleep(time.Millisecond * time.Duration(2000+rand.Intn(2001)))
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net.BucketFill()
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}
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}
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switch {
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case *regtopic != "":
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// register topic
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fmt.Println("Starting topic register")
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stop := make(chan struct{})
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net.RegisterTopic(discv5.Topic(*regtopic), stop)
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case *looktopic != "":
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// search topic
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fmt.Println("Starting topic search")
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stop := make(chan struct{})
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found := make(chan string, 100)
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go net.SearchTopic(discv5.Topic(*looktopic), stop, found)
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for s := range found {
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fmt.Println(time.Now(), s)
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}
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default:
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// just keep doing lookups
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for {
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time.Sleep(time.Millisecond * time.Duration(40000+rand.Intn(40001)))
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net.BucketFill()
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}
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}
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}()
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}
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fmt.Printf("Started test node #%d with public key %v\n", i, discv5.PubkeyID(&nodeKey.PublicKey))
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}
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select {}
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}
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