b7394d7942
This adds an implementation of the current discovery v5 spec. There is full integration with cmd/devp2p and enode.Iterator in this version. In theory we could enable the new protocol as a replacement of discovery v4 at any time. In practice, there will likely be a few more changes to the spec and implementation before this can happen.
99 lines
2.4 KiB
Go
99 lines
2.4 KiB
Go
// Copyright 2019 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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package main
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import (
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"fmt"
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"os"
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"path/filepath"
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"sort"
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"github.com/ethereum/go-ethereum/internal/debug"
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"github.com/ethereum/go-ethereum/p2p/enode"
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"github.com/ethereum/go-ethereum/params"
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"gopkg.in/urfave/cli.v1"
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)
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var (
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// Git information set by linker when building with ci.go.
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gitCommit string
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gitDate string
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app = &cli.App{
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Name: filepath.Base(os.Args[0]),
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Usage: "go-ethereum devp2p tool",
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Version: params.VersionWithCommit(gitCommit, gitDate),
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Writer: os.Stdout,
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HideVersion: true,
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}
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)
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func init() {
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// Set up the CLI app.
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app.Flags = append(app.Flags, debug.Flags...)
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app.Before = func(ctx *cli.Context) error {
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return debug.Setup(ctx)
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}
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app.After = func(ctx *cli.Context) error {
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debug.Exit()
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return nil
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}
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app.CommandNotFound = func(ctx *cli.Context, cmd string) {
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fmt.Fprintf(os.Stderr, "No such command: %s\n", cmd)
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os.Exit(1)
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}
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// Add subcommands.
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app.Commands = []cli.Command{
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enrdumpCommand,
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discv4Command,
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discv5Command,
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dnsCommand,
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nodesetCommand,
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}
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}
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func main() {
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exit(app.Run(os.Args))
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}
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// commandHasFlag returns true if the current command supports the given flag.
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func commandHasFlag(ctx *cli.Context, flag cli.Flag) bool {
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flags := ctx.FlagNames()
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sort.Strings(flags)
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i := sort.SearchStrings(flags, flag.GetName())
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return i != len(flags) && flags[i] == flag.GetName()
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}
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// getNodeArg handles the common case of a single node descriptor argument.
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func getNodeArg(ctx *cli.Context) *enode.Node {
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if ctx.NArg() != 1 {
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exit("missing node as command-line argument")
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}
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n, err := parseNode(ctx.Args()[0])
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if err != nil {
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exit(err)
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}
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return n
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}
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func exit(err interface{}) {
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if err == nil {
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os.Exit(0)
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}
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fmt.Fprintln(os.Stderr, err)
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os.Exit(1)
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}
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