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tailscale/net/stunserver/stunserver_test.go

89 lines
1.8 KiB
Go

// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
package stunserver
import (
"context"
"net"
"sync"
"testing"
"time"
"tailscale.com/net/stun"
"tailscale.com/util/must"
)
func TestSTUNServer(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
s := New(ctx)
must.Do(s.Listen("localhost:0"))
var w sync.WaitGroup
w.Add(1)
var serveErr error
go func() {
defer w.Done()
serveErr = s.Serve()
}()
c := must.Get(net.DialUDP("udp", nil, s.LocalAddr().(*net.UDPAddr)))
defer c.Close()
c.SetDeadline(time.Now().Add(5 * time.Second))
txid := stun.NewTxID()
_, err := c.Write(stun.Request(txid))
if err != nil {
t.Fatalf("failed to write STUN request: %v", err)
}
var buf [64 << 10]byte
n, err := c.Read(buf[:])
if err != nil {
t.Fatalf("failed to read STUN response: %v", err)
}
if !stun.Is(buf[:n]) {
t.Fatalf("response is not STUN")
}
tid, _, err := stun.ParseResponse(buf[:n])
if err != nil {
t.Fatalf("failed to parse STUN response: %v", err)
}
if tid != txid {
t.Fatalf("STUN response has wrong transaction ID; got %d, want %d", tid, txid)
}
cancel()
w.Wait()
if serveErr != nil {
t.Fatalf("failed to listen and serve: %v", serveErr)
}
}
func BenchmarkServerSTUN(b *testing.B) {
b.ReportAllocs()
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
s := New(ctx)
s.Listen("localhost:0")
go s.Serve()
addr := s.LocalAddr().(*net.UDPAddr)
var resBuf [1500]byte
cc, err := net.ListenUDP("udp", &net.UDPAddr{IP: net.ParseIP("127.0.0.1")})
if err != nil {
b.Fatal(err)
}
tx := stun.NewTxID()
req := stun.Request(tx)
for i := 0; i < b.N; i++ {
if _, err := cc.WriteToUDP(req, addr); err != nil {
b.Fatal(err)
}
_, _, err := cc.ReadFromUDP(resBuf[:])
if err != nil {
b.Fatal(err)
}
}
}