forked from mirror/go-ethereum
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80ea44c485
commit
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// 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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