105 lines
2.9 KiB
Go
105 lines
2.9 KiB
Go
// Copyright 2023 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser 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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// The go-ethereum library 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 Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package p2p
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import (
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"net"
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"net/netip"
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"sync/atomic"
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"testing"
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"time"
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"github.com/ethereum/go-ethereum/common/mclock"
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"github.com/ethereum/go-ethereum/internal/testlog"
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"github.com/ethereum/go-ethereum/log"
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)
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func TestServerPortMapping(t *testing.T) {
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clock := new(mclock.Simulated)
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mockNAT := &mockNAT{mappedPort: 30000}
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srv := Server{
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Config: Config{
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PrivateKey: newkey(),
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NoDial: true,
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ListenAddr: ":0",
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DiscAddr: ":0",
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NAT: mockNAT,
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Logger: testlog.Logger(t, log.LvlTrace),
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clock: clock,
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},
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}
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err := srv.Start()
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if err != nil {
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t.Fatal(err)
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}
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defer srv.Stop()
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// Wait for the port mapping to be registered. Synchronization with the port mapping
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// goroutine works like this: For each iteration, we allow other goroutines to run and
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// also advance the virtual clock by 1 second. Waiting stops when the NAT interface
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// has received some requests, or when the clock reaches a timeout.
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deadline := clock.Now().Add(portMapRefreshInterval)
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for clock.Now() < deadline && mockNAT.mapRequests.Load() < 2 {
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time.Sleep(10 * time.Millisecond)
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clock.Run(1 * time.Second)
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}
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if mockNAT.ipRequests.Load() == 0 {
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t.Fatal("external IP was never requested")
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}
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reqCount := mockNAT.mapRequests.Load()
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if reqCount != 2 {
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t.Error("wrong request count:", reqCount)
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}
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enr := srv.LocalNode().Node()
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if enr.IPAddr() != netip.MustParseAddr("192.0.2.0") {
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t.Error("wrong IP in ENR:", enr.IPAddr())
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}
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if enr.TCP() != 30000 {
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t.Error("wrong TCP port in ENR:", enr.TCP())
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}
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if enr.UDP() != 30000 {
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t.Error("wrong UDP port in ENR:", enr.UDP())
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}
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}
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type mockNAT struct {
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mappedPort uint16
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mapRequests atomic.Int32
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unmapRequests atomic.Int32
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ipRequests atomic.Int32
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}
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func (m *mockNAT) AddMapping(protocol string, extport, intport int, name string, lifetime time.Duration) (uint16, error) {
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m.mapRequests.Add(1)
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return m.mappedPort, nil
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}
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func (m *mockNAT) DeleteMapping(protocol string, extport, intport int) error {
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m.unmapRequests.Add(1)
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return nil
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}
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func (m *mockNAT) ExternalIP() (net.IP, error) {
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m.ipRequests.Add(1)
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return net.ParseIP("192.0.2.0"), nil
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}
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func (m *mockNAT) String() string {
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return "mockNAT"
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}
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