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da8def8e13
The //go:build syntax was introduced in Go 1.17: https://go.dev/doc/go1.17#build-lines gofmt has kept the +build and go:build lines in sync since then, but enough time has passed. Time to remove them. Done with: perl -i -npe 's,^// \+build.*\n,,' $(git grep -l -F '+build') Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
79 lines
1.7 KiB
Go
79 lines
1.7 KiB
Go
// Copyright (c) 2021 Tailscale Inc & AUTHORS All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//go:build ignore
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// Command udp_tester exists because all of these distros being tested don't
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// have a consistent tool for doing UDP traffic. This is a very hacked up tool
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// that does that UDP traffic so these tests can be done.
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package main
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import (
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"flag"
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"io"
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"log"
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"net"
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"os"
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)
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var (
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client = flag.String("client", "", "host:port to connect to for sending UDP")
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server = flag.String("server", "", "host:port to bind to for receiving UDP")
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)
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func main() {
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flag.Parse()
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if *client == "" && *server == "" {
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log.Fatal("specify -client or -server")
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}
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if *client != "" {
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conn, err := net.Dial("udp", *client)
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if err != nil {
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log.Fatalf("can't dial %s: %v", *client, err)
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}
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log.Printf("dialed to %s", conn.RemoteAddr())
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defer conn.Close()
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buf := make([]byte, 2048)
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n, err := os.Stdin.Read(buf)
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if err != nil && err != io.EOF {
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log.Fatalf("can't read from stdin: %v", err)
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}
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nn, err := conn.Write(buf[:n])
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if err != nil {
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log.Fatalf("can't write to %s: %v", conn.RemoteAddr(), err)
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}
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if n == nn {
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return
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}
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log.Fatalf("wanted to write %d bytes, wrote %d bytes", n, nn)
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}
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if *server != "" {
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addr, err := net.ResolveUDPAddr("udp", *server)
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if err != nil {
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log.Fatalf("can't resolve %s: %v", *server, err)
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}
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ln, err := net.ListenUDP("udp", addr)
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if err != nil {
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log.Fatalf("can't listen %s: %v", *server, err)
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}
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defer ln.Close()
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buf := make([]byte, 2048)
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n, _, err := ln.ReadFromUDP(buf)
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if err != nil {
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log.Fatal(err)
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}
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os.Stdout.Write(buf[:n])
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}
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}
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