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490 lines
13 KiB
490 lines
13 KiB
package conn
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import (
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"bytes"
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"net"
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"testing"
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"time"
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"github.com/fortytw2/leaktest"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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amino "github.com/tendermint/go-amino"
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"github.com/tendermint/tendermint/libs/log"
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)
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const maxPingPongPacketSize = 1024 // bytes
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func createTestMConnection(conn net.Conn) *MConnection {
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onReceive := func(chID byte, msgBytes []byte) {
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}
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onError := func(r interface{}) {
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}
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c := createMConnectionWithCallbacks(conn, onReceive, onError)
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c.SetLogger(log.TestingLogger())
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return c
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}
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func createMConnectionWithCallbacks(conn net.Conn, onReceive func(chID byte, msgBytes []byte), onError func(r interface{})) *MConnection {
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cfg := DefaultMConnConfig()
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cfg.PingInterval = 90 * time.Millisecond
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cfg.PongTimeout = 45 * time.Millisecond
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chDescs := []*ChannelDescriptor{&ChannelDescriptor{ID: 0x01, Priority: 1, SendQueueCapacity: 1}}
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c := NewMConnectionWithConfig(conn, chDescs, onReceive, onError, cfg)
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c.SetLogger(log.TestingLogger())
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return c
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}
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func TestMConnectionSend(t *testing.T) {
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server, client := NetPipe()
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defer server.Close() // nolint: errcheck
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defer client.Close() // nolint: errcheck
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mconn := createTestMConnection(client)
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err := mconn.Start()
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require.Nil(t, err)
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defer mconn.Stop()
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msg := []byte("Ant-Man")
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assert.True(t, mconn.Send(0x01, msg))
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// Note: subsequent Send/TrySend calls could pass because we are reading from
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// the send queue in a separate goroutine.
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_, err = server.Read(make([]byte, len(msg)))
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if err != nil {
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t.Error(err)
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}
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assert.True(t, mconn.CanSend(0x01))
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msg = []byte("Spider-Man")
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assert.True(t, mconn.TrySend(0x01, msg))
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_, err = server.Read(make([]byte, len(msg)))
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if err != nil {
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t.Error(err)
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}
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assert.False(t, mconn.CanSend(0x05), "CanSend should return false because channel is unknown")
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assert.False(t, mconn.Send(0x05, []byte("Absorbing Man")), "Send should return false because channel is unknown")
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}
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func TestMConnectionReceive(t *testing.T) {
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server, client := NetPipe()
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defer server.Close() // nolint: errcheck
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defer client.Close() // nolint: errcheck
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receivedCh := make(chan []byte)
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errorsCh := make(chan interface{})
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onReceive := func(chID byte, msgBytes []byte) {
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receivedCh <- msgBytes
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}
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onError := func(r interface{}) {
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errorsCh <- r
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}
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mconn1 := createMConnectionWithCallbacks(client, onReceive, onError)
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err := mconn1.Start()
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require.Nil(t, err)
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defer mconn1.Stop()
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mconn2 := createTestMConnection(server)
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err = mconn2.Start()
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require.Nil(t, err)
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defer mconn2.Stop()
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msg := []byte("Cyclops")
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assert.True(t, mconn2.Send(0x01, msg))
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select {
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case receivedBytes := <-receivedCh:
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assert.Equal(t, []byte(msg), receivedBytes)
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case err := <-errorsCh:
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t.Fatalf("Expected %s, got %+v", msg, err)
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case <-time.After(500 * time.Millisecond):
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t.Fatalf("Did not receive %s message in 500ms", msg)
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}
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}
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func TestMConnectionStatus(t *testing.T) {
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server, client := NetPipe()
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defer server.Close() // nolint: errcheck
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defer client.Close() // nolint: errcheck
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mconn := createTestMConnection(client)
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err := mconn.Start()
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require.Nil(t, err)
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defer mconn.Stop()
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status := mconn.Status()
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assert.NotNil(t, status)
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assert.Zero(t, status.Channels[0].SendQueueSize)
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}
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func TestMConnectionPongTimeoutResultsInError(t *testing.T) {
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server, client := net.Pipe()
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defer server.Close()
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defer client.Close()
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receivedCh := make(chan []byte)
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errorsCh := make(chan interface{})
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onReceive := func(chID byte, msgBytes []byte) {
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receivedCh <- msgBytes
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}
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onError := func(r interface{}) {
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errorsCh <- r
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}
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mconn := createMConnectionWithCallbacks(client, onReceive, onError)
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err := mconn.Start()
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require.Nil(t, err)
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defer mconn.Stop()
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serverGotPing := make(chan struct{})
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go func() {
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// read ping
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var pkt PacketPing
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_, err = cdc.UnmarshalBinaryReader(server, &pkt, maxPingPongPacketSize)
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assert.Nil(t, err)
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serverGotPing <- struct{}{}
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}()
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<-serverGotPing
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pongTimerExpired := mconn.config.PongTimeout + 20*time.Millisecond
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select {
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case msgBytes := <-receivedCh:
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t.Fatalf("Expected error, but got %v", msgBytes)
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case err := <-errorsCh:
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assert.NotNil(t, err)
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case <-time.After(pongTimerExpired):
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t.Fatalf("Expected to receive error after %v", pongTimerExpired)
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}
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}
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func TestMConnectionMultiplePongsInTheBeginning(t *testing.T) {
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server, client := net.Pipe()
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defer server.Close()
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defer client.Close()
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receivedCh := make(chan []byte)
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errorsCh := make(chan interface{})
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onReceive := func(chID byte, msgBytes []byte) {
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receivedCh <- msgBytes
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}
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onError := func(r interface{}) {
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errorsCh <- r
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}
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mconn := createMConnectionWithCallbacks(client, onReceive, onError)
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err := mconn.Start()
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require.Nil(t, err)
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defer mconn.Stop()
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// sending 3 pongs in a row (abuse)
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_, err = server.Write(cdc.MustMarshalBinary(PacketPong{}))
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require.Nil(t, err)
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_, err = server.Write(cdc.MustMarshalBinary(PacketPong{}))
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require.Nil(t, err)
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_, err = server.Write(cdc.MustMarshalBinary(PacketPong{}))
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require.Nil(t, err)
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serverGotPing := make(chan struct{})
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go func() {
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// read ping (one byte)
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var packet, err = Packet(nil), error(nil)
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_, err = cdc.UnmarshalBinaryReader(server, &packet, maxPingPongPacketSize)
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require.Nil(t, err)
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serverGotPing <- struct{}{}
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// respond with pong
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_, err = server.Write(cdc.MustMarshalBinary(PacketPong{}))
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require.Nil(t, err)
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}()
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<-serverGotPing
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pongTimerExpired := mconn.config.PongTimeout + 20*time.Millisecond
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select {
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case msgBytes := <-receivedCh:
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t.Fatalf("Expected no data, but got %v", msgBytes)
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case err := <-errorsCh:
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t.Fatalf("Expected no error, but got %v", err)
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case <-time.After(pongTimerExpired):
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assert.True(t, mconn.IsRunning())
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}
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}
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func TestMConnectionMultiplePings(t *testing.T) {
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server, client := net.Pipe()
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defer server.Close()
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defer client.Close()
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receivedCh := make(chan []byte)
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errorsCh := make(chan interface{})
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onReceive := func(chID byte, msgBytes []byte) {
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receivedCh <- msgBytes
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}
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onError := func(r interface{}) {
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errorsCh <- r
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}
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mconn := createMConnectionWithCallbacks(client, onReceive, onError)
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err := mconn.Start()
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require.Nil(t, err)
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defer mconn.Stop()
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// sending 3 pings in a row (abuse)
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// see https://github.com/tendermint/tendermint/issues/1190
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_, err = server.Write(cdc.MustMarshalBinary(PacketPing{}))
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require.Nil(t, err)
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var pkt PacketPong
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_, err = cdc.UnmarshalBinaryReader(server, &pkt, maxPingPongPacketSize)
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require.Nil(t, err)
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_, err = server.Write(cdc.MustMarshalBinary(PacketPing{}))
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require.Nil(t, err)
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_, err = cdc.UnmarshalBinaryReader(server, &pkt, maxPingPongPacketSize)
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require.Nil(t, err)
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_, err = server.Write(cdc.MustMarshalBinary(PacketPing{}))
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require.Nil(t, err)
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_, err = cdc.UnmarshalBinaryReader(server, &pkt, maxPingPongPacketSize)
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require.Nil(t, err)
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assert.True(t, mconn.IsRunning())
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}
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func TestMConnectionPingPongs(t *testing.T) {
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// check that we are not leaking any go-routines
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defer leaktest.CheckTimeout(t, 10*time.Second)()
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server, client := net.Pipe()
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defer server.Close()
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defer client.Close()
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receivedCh := make(chan []byte)
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errorsCh := make(chan interface{})
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onReceive := func(chID byte, msgBytes []byte) {
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receivedCh <- msgBytes
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}
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onError := func(r interface{}) {
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errorsCh <- r
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}
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mconn := createMConnectionWithCallbacks(client, onReceive, onError)
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err := mconn.Start()
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require.Nil(t, err)
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defer mconn.Stop()
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serverGotPing := make(chan struct{})
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go func() {
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// read ping
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var pkt PacketPing
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_, err = cdc.UnmarshalBinaryReader(server, &pkt, maxPingPongPacketSize)
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require.Nil(t, err)
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serverGotPing <- struct{}{}
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// respond with pong
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_, err = server.Write(cdc.MustMarshalBinary(PacketPong{}))
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require.Nil(t, err)
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time.Sleep(mconn.config.PingInterval)
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// read ping
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_, err = cdc.UnmarshalBinaryReader(server, &pkt, maxPingPongPacketSize)
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require.Nil(t, err)
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// respond with pong
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_, err = server.Write(cdc.MustMarshalBinary(PacketPong{}))
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require.Nil(t, err)
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}()
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<-serverGotPing
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pongTimerExpired := (mconn.config.PongTimeout + 20*time.Millisecond) * 2
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select {
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case msgBytes := <-receivedCh:
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t.Fatalf("Expected no data, but got %v", msgBytes)
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case err := <-errorsCh:
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t.Fatalf("Expected no error, but got %v", err)
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case <-time.After(2 * pongTimerExpired):
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assert.True(t, mconn.IsRunning())
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}
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}
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func TestMConnectionStopsAndReturnsError(t *testing.T) {
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server, client := NetPipe()
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defer server.Close() // nolint: errcheck
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defer client.Close() // nolint: errcheck
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receivedCh := make(chan []byte)
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errorsCh := make(chan interface{})
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onReceive := func(chID byte, msgBytes []byte) {
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receivedCh <- msgBytes
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}
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onError := func(r interface{}) {
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errorsCh <- r
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}
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mconn := createMConnectionWithCallbacks(client, onReceive, onError)
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err := mconn.Start()
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require.Nil(t, err)
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defer mconn.Stop()
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if err := client.Close(); err != nil {
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t.Error(err)
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}
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select {
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case receivedBytes := <-receivedCh:
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t.Fatalf("Expected error, got %v", receivedBytes)
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case err := <-errorsCh:
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assert.NotNil(t, err)
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assert.False(t, mconn.IsRunning())
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case <-time.After(500 * time.Millisecond):
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t.Fatal("Did not receive error in 500ms")
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}
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}
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func newClientAndServerConnsForReadErrors(t *testing.T, chOnErr chan struct{}) (*MConnection, *MConnection) {
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server, client := NetPipe()
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onReceive := func(chID byte, msgBytes []byte) {}
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onError := func(r interface{}) {}
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// create client conn with two channels
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chDescs := []*ChannelDescriptor{
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{ID: 0x01, Priority: 1, SendQueueCapacity: 1},
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{ID: 0x02, Priority: 1, SendQueueCapacity: 1},
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}
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mconnClient := NewMConnection(client, chDescs, onReceive, onError)
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mconnClient.SetLogger(log.TestingLogger().With("module", "client"))
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err := mconnClient.Start()
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require.Nil(t, err)
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// create server conn with 1 channel
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// it fires on chOnErr when there's an error
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serverLogger := log.TestingLogger().With("module", "server")
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onError = func(r interface{}) {
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chOnErr <- struct{}{}
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}
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mconnServer := createMConnectionWithCallbacks(server, onReceive, onError)
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mconnServer.SetLogger(serverLogger)
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err = mconnServer.Start()
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require.Nil(t, err)
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return mconnClient, mconnServer
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}
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func expectSend(ch chan struct{}) bool {
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after := time.After(time.Second * 5)
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select {
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case <-ch:
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return true
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case <-after:
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return false
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}
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}
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func TestMConnectionReadErrorBadEncoding(t *testing.T) {
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chOnErr := make(chan struct{})
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mconnClient, mconnServer := newClientAndServerConnsForReadErrors(t, chOnErr)
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defer mconnClient.Stop()
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defer mconnServer.Stop()
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client := mconnClient.conn
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// send badly encoded msgPacket
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bz := cdc.MustMarshalBinary(PacketMsg{})
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bz[4] += 0x01 // Invalid prefix bytes.
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// Write it.
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_, err := client.Write(bz)
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assert.Nil(t, err)
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assert.True(t, expectSend(chOnErr), "badly encoded msgPacket")
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}
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func TestMConnectionReadErrorUnknownChannel(t *testing.T) {
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chOnErr := make(chan struct{})
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mconnClient, mconnServer := newClientAndServerConnsForReadErrors(t, chOnErr)
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defer mconnClient.Stop()
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defer mconnServer.Stop()
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msg := []byte("Ant-Man")
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// fail to send msg on channel unknown by client
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assert.False(t, mconnClient.Send(0x03, msg))
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// send msg on channel unknown by the server.
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// should cause an error
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assert.True(t, mconnClient.Send(0x02, msg))
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assert.True(t, expectSend(chOnErr), "unknown channel")
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}
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func TestMConnectionReadErrorLongMessage(t *testing.T) {
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chOnErr := make(chan struct{})
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chOnRcv := make(chan struct{})
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mconnClient, mconnServer := newClientAndServerConnsForReadErrors(t, chOnErr)
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defer mconnClient.Stop()
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defer mconnServer.Stop()
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mconnServer.onReceive = func(chID byte, msgBytes []byte) {
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chOnRcv <- struct{}{}
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}
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client := mconnClient.conn
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// send msg thats just right
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var err error
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var buf = new(bytes.Buffer)
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var packet = PacketMsg{
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ChannelID: 0x01,
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EOF: 1,
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Bytes: make([]byte, mconnClient.config.MaxPacketMsgPayloadSize),
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}
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_, err = cdc.MarshalBinaryWriter(buf, packet)
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assert.Nil(t, err)
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_, err = client.Write(buf.Bytes())
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assert.Nil(t, err)
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assert.True(t, expectSend(chOnRcv), "msg just right")
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// send msg thats too long
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buf = new(bytes.Buffer)
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packet = PacketMsg{
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ChannelID: 0x01,
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EOF: 1,
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Bytes: make([]byte, mconnClient.config.MaxPacketMsgPayloadSize+100),
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}
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_, err = cdc.MarshalBinaryWriter(buf, packet)
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assert.Nil(t, err)
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_, err = client.Write(buf.Bytes())
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assert.NotNil(t, err)
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assert.True(t, expectSend(chOnErr), "msg too long")
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}
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func TestMConnectionReadErrorUnknownMsgType(t *testing.T) {
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chOnErr := make(chan struct{})
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mconnClient, mconnServer := newClientAndServerConnsForReadErrors(t, chOnErr)
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defer mconnClient.Stop()
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defer mconnServer.Stop()
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// send msg with unknown msg type
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err := error(nil)
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err = amino.EncodeUvarint(mconnClient.conn, 4)
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assert.Nil(t, err)
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_, err = mconnClient.conn.Write([]byte{0xFF, 0xFF, 0xFF, 0xFF})
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assert.Nil(t, err)
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assert.True(t, expectSend(chOnErr), "unknown msg type")
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}
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func TestMConnectionTrySend(t *testing.T) {
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server, client := NetPipe()
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defer server.Close()
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defer client.Close()
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mconn := createTestMConnection(client)
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err := mconn.Start()
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require.Nil(t, err)
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defer mconn.Stop()
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msg := []byte("Semicolon-Woman")
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resultCh := make(chan string, 2)
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assert.True(t, mconn.TrySend(0x01, msg))
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server.Read(make([]byte, len(msg)))
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assert.True(t, mconn.CanSend(0x01))
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assert.True(t, mconn.TrySend(0x01, msg))
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assert.False(t, mconn.CanSend(0x01))
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go func() {
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mconn.TrySend(0x01, msg)
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resultCh <- "TrySend"
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}()
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assert.False(t, mconn.CanSend(0x01))
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assert.False(t, mconn.TrySend(0x01, msg))
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assert.Equal(t, "TrySend", <-resultCh)
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}
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