mirror of
https://github.com/qdm12/gluetun.git
synced 2026-05-07 04:20:12 +02:00
Quentin McGaw
57 lines
1.8 KiB
Go
57 lines
1.8 KiB
Go
//go:build integration
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package tcp
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import (
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"errors"
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"net/netip"
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"testing"
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"time"
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"github.com/qdm12/gluetun/internal/command"
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"github.com/qdm12/gluetun/internal/firewall"
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"github.com/qdm12/gluetun/internal/firewall/iptables"
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"github.com/qdm12/gluetun/internal/pmtud/constants"
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"github.com/qdm12/log"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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func Test_PathMTUDiscover(t *testing.T) {
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t.Parallel()
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const tryTimeout = time.Second
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deadline, ok := t.Deadline()
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if ok {
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timeLeft := time.Until(deadline)
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const maxTimeNeeded = tryTimeout * 4 // MSS discovery + 3 MTU tries
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require.GreaterOrEqual(t, timeLeft, maxTimeNeeded,
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"not enough time remaining for TCP PMTUD test, need %s and got %s",
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maxTimeNeeded, timeLeft)
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}
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logger := log.New(log.SetLevel(log.LevelDebug))
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cmder := command.New()
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fw, err := firewall.NewConfig(t.Context(), logger, logger, cmder, nil, nil)
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if errors.Is(err, iptables.ErrNotSupported) {
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t.Skip("iptables not installed, skipping TCP PMTUD tests")
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}
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require.NoError(t, err, "creating firewall config")
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dsts := []netip.AddrPort{
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netip.AddrPortFrom(netip.AddrFrom4([4]byte{1, 1, 1, 1}), 53),
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netip.AddrPortFrom(netip.AddrFrom4([4]byte{1, 1, 1, 1}), 443),
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netip.AddrPortFrom(netip.AddrFrom4([4]byte{8, 8, 8, 8}), 53),
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netip.AddrPortFrom(netip.AddrFrom4([4]byte{8, 8, 8, 8}), 443),
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netip.AddrPortFrom(netip.MustParseAddr("2606:4700:4700::1111"), 443),
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netip.AddrPortFrom(netip.MustParseAddr("2001:4860:4860::8888"), 443),
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}
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const minMTU = constants.MinIPv6MTU
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const maxMTU = constants.MaxEthernetFrameSize
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mtu, err := PathMTUDiscover(t.Context(), dsts, minMTU, maxMTU, tryTimeout, fw, logger)
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require.NoError(t, err, "discovering path MTU")
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assert.Greater(t, mtu, uint32(0), "MTU should be greater than 0")
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t.Logf("discovered path MTU is %d", mtu)
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}
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