From 4242b054628b46ea3470e156992c8e41e01c0739 Mon Sep 17 00:00:00 2001
From: Felix Lange <fjl@twurst.com>
Date: Tue, 10 Feb 2015 14:26:54 +0100
Subject: [PATCH] cmd/bootnode: new command (replaces cmd/peerserver)
---
cmd/bootnode/main.go | 86 ++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 86 insertions(+)
create mode 100644 cmd/bootnode/main.go
diff --git a/cmd/bootnode/main.go b/cmd/bootnode/main.go
new file mode 100644
index 000000000..fd96a7b48
--- /dev/null
+++ b/cmd/bootnode/main.go
@@ -0,0 +1,86 @@
+/*
+ This file is part of go-ethereum
+
+ go-ethereum is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ go-ethereum 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+// Command bootnode runs a bootstrap node for the Discovery Protocol.
+package main
+
+import (
+ "crypto/ecdsa"
+ "encoding/hex"
+ "flag"
+ "fmt"
+ "io/ioutil"
+ "log"
+ "os"
+
+ "github.com/ethereum/go-ethereum/crypto"
+ "github.com/ethereum/go-ethereum/logger"
+ "github.com/ethereum/go-ethereum/p2p/discover"
+)
+
+func main() {
+ var (
+ listenAddr = flag.String("addr", ":30301", "listen address")
+ genKey = flag.String("genkey", "", "generate a node key and quit")
+ nodeKeyFile = flag.String("nodekey", "", "private key filename")
+ nodeKeyHex = flag.String("nodekeyhex", "", "private key as hex (for testing)")
+ nodeKey *ecdsa.PrivateKey
+ err error
+ )
+ flag.Parse()
+ logger.AddLogSystem(logger.NewStdLogSystem(os.Stdout, log.LstdFlags, logger.DebugLevel))
+
+ if *genKey != "" {
+ writeKey(*genKey)
+ os.Exit(0)
+ }
+
+ switch {
+ case *nodeKeyFile == "" && *nodeKeyHex == "":
+ log.Fatal("Use -nodekey or -nodekeyhex to specify a private key")
+ case *nodeKeyFile != "" && *nodeKeyHex != "":
+ log.Fatal("Options -nodekey and -nodekeyhex are mutually exclusive")
+ case *nodeKeyFile != "":
+ if nodeKey, err = crypto.LoadECDSA(*nodeKeyFile); err != nil {
+ log.Fatalf("-nodekey: %v", err)
+ }
+ case *nodeKeyHex != "":
+ if nodeKey, err = crypto.HexToECDSA(*nodeKeyHex); err != nil {
+ log.Fatalf("-nodekeyhex: %v", err)
+ }
+ }
+
+ if _, err := discover.ListenUDP(nodeKey, *listenAddr); err != nil {
+ log.Fatal(err)
+ }
+ select {}
+}
+
+func writeKey(target string) {
+ key, err := crypto.GenerateKey()
+ if err != nil {
+ log.Fatal("could not generate key: %v", err)
+ }
+ b := crypto.FromECDSA(key)
+ if target == "-" {
+ fmt.Println(hex.EncodeToString(b))
+ } else {
+ if err := ioutil.WriteFile(target, b, 0600); err != nil {
+ log.Fatal("write error: ", err)
+ }
+ }
+}
--
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