ceremonyclient/go-libp2p/p2p/host/basic/natmgr_test.go

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2023-08-21 03:50:38 +00:00
package basichost
import (
"context"
"net/netip"
"testing"
"time"
"github.com/stretchr/testify/require"
ma "github.com/multiformats/go-multiaddr"
swarmt "github.com/libp2p/go-libp2p/p2p/net/swarm/testing"
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"go.uber.org/mock/gomock"
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)
func setupMockNAT(t *testing.T) (mockNAT *MockNAT, reset func()) {
t.Helper()
ctrl := gomock.NewController(t)
mockNAT = NewMockNAT(ctrl)
origDiscoverNAT := discoverNAT
discoverNAT = func(ctx context.Context) (nat, error) { return mockNAT, nil }
return mockNAT, func() {
discoverNAT = origDiscoverNAT
ctrl.Finish()
}
}
func TestMapping(t *testing.T) {
mockNAT, reset := setupMockNAT(t)
defer reset()
sw := swarmt.GenSwarm(t)
defer sw.Close()
m := newNATManager(sw)
require.Eventually(t, func() bool {
m.natMx.Lock()
defer m.natMx.Unlock()
return m.nat != nil
}, time.Second, time.Millisecond)
externalAddr := netip.AddrPortFrom(netip.AddrFrom4([4]byte{1, 2, 3, 4}), 4321)
// pretend that we have a TCP mapping
mockNAT.EXPECT().GetMapping("tcp", 1234).Return(externalAddr, true)
require.Equal(t, ma.StringCast("/ip4/1.2.3.4/tcp/4321"), m.GetMapping(ma.StringCast("/ip4/0.0.0.0/tcp/1234")))
// pretend that we have a QUIC mapping
mockNAT.EXPECT().GetMapping("udp", 1234).Return(externalAddr, true)
require.Equal(t, ma.StringCast("/ip4/1.2.3.4/udp/4321/quic-v1"), m.GetMapping(ma.StringCast("/ip4/0.0.0.0/udp/1234/quic-v1")))
// pretend that there's no mapping
mockNAT.EXPECT().GetMapping("tcp", 1234).Return(netip.AddrPort{}, false)
require.Nil(t, m.GetMapping(ma.StringCast("/ip4/0.0.0.0/tcp/1234")))
// make sure this works for WebSocket addresses as well
mockNAT.EXPECT().GetMapping("tcp", 1234).Return(externalAddr, true)
require.Equal(t, ma.StringCast("/ip4/1.2.3.4/tcp/4321/ws"), m.GetMapping(ma.StringCast("/ip4/0.0.0.0/tcp/1234/ws")))
// make sure this works for WebTransport addresses as well
mockNAT.EXPECT().GetMapping("udp", 1234).Return(externalAddr, true)
require.Equal(t, ma.StringCast("/ip4/1.2.3.4/udp/4321/quic-v1/webtransport"), m.GetMapping(ma.StringCast("/ip4/0.0.0.0/udp/1234/quic-v1/webtransport")))
}
func TestAddAndRemoveListeners(t *testing.T) {
mockNAT, reset := setupMockNAT(t)
defer reset()
sw := swarmt.GenSwarm(t)
defer sw.Close()
m := newNATManager(sw)
require.Eventually(t, func() bool {
m.natMx.Lock()
defer m.natMx.Unlock()
return m.nat != nil
}, time.Second, time.Millisecond)
added := make(chan struct{}, 1)
// add a TCP listener
mockNAT.EXPECT().AddMapping(gomock.Any(), "tcp", 1234).Do(func(context.Context, string, int) { added <- struct{}{} })
require.NoError(t, sw.Listen(ma.StringCast("/ip4/0.0.0.0/tcp/1234")))
select {
case <-added:
case <-time.After(time.Second):
t.Fatal("didn't receive call to AddMapping")
}
// add a QUIC listener
mockNAT.EXPECT().AddMapping(gomock.Any(), "udp", 1234).Do(func(context.Context, string, int) { added <- struct{}{} })
require.NoError(t, sw.Listen(ma.StringCast("/ip4/0.0.0.0/udp/1234/quic-v1")))
select {
case <-added:
case <-time.After(time.Second):
t.Fatal("didn't receive call to AddMapping")
}
// remove the QUIC listener
mockNAT.EXPECT().RemoveMapping(gomock.Any(), "udp", 1234).Do(func(context.Context, string, int) { added <- struct{}{} })
sw.ListenClose(ma.StringCast("/ip4/0.0.0.0/udp/1234/quic-v1"))
select {
case <-added:
case <-time.After(time.Second):
t.Fatal("didn't receive call to RemoveMapping")
}
// test shutdown
mockNAT.EXPECT().RemoveMapping(gomock.Any(), "tcp", 1234).MaxTimes(1)
mockNAT.EXPECT().Close().MaxTimes(1)
}