1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
package self_test
import (
"context"
"fmt"
"net"
"sync/atomic"
"testing"
"time"
"github.com/quic-go/quic-go"
quicproxy "github.com/quic-go/quic-go/integrationtests/tools/proxy"
"github.com/quic-go/quic-go/internal/wire"
"github.com/stretchr/testify/require"
)
func TestDropTests(t *testing.T) {
for _, direction := range []quicproxy.Direction{quicproxy.DirectionIncoming, quicproxy.DirectionOutgoing} {
t.Run(fmt.Sprintf("in %s direction", direction), func(t *testing.T) {
const numMessages = 15
const rtt = 10 * time.Millisecond
messageInterval := randomDuration(10*time.Millisecond, 100*time.Millisecond)
dropDuration := randomDuration(messageInterval*3/2, 2*time.Second)
dropDelay := randomDuration(25*time.Millisecond, numMessages*messageInterval/2)
t.Logf("sending a message every %s, %d times", messageInterval, numMessages)
t.Logf("dropping packets for %s, after a delay of %s", dropDuration, dropDelay)
startTime := time.Now()
ln, err := quic.Listen(newUDPConnLocalhost(t), getTLSConfig(), getQuicConfig(nil))
require.NoError(t, err)
defer ln.Close()
var numDroppedPackets atomic.Int32
proxy := &quicproxy.Proxy{
Conn: newUDPConnLocalhost(t),
ServerAddr: ln.Addr().(*net.UDPAddr),
DelayPacket: func(quicproxy.Direction, net.Addr, net.Addr, []byte) time.Duration { return rtt / 2 },
DropPacket: func(d quicproxy.Direction, _, _ net.Addr, b []byte) bool {
if !d.Is(direction) {
return false
}
if wire.IsLongHeaderPacket(b[0]) { // don't interfere with the handshake
return false
}
drop := time.Now().After(startTime.Add(dropDelay)) && time.Now().Before(startTime.Add(dropDelay).Add(dropDuration))
if drop {
numDroppedPackets.Add(1)
}
return drop
},
}
require.NoError(t, proxy.Start())
defer proxy.Close()
ctx, cancel := context.WithTimeout(context.Background(), time.Second)
defer cancel()
conn, err := quic.Dial(ctx, newUDPConnLocalhost(t), proxy.LocalAddr(), getTLSClientConfig(), getQuicConfig(nil))
require.NoError(t, err)
defer conn.CloseWithError(0, "")
serverConn, err := ln.Accept(ctx)
require.NoError(t, err)
serverStr, err := serverConn.OpenUniStream()
require.NoError(t, err)
errChan := make(chan error, 1)
go func() {
for i := uint8(1); i <= numMessages; i++ {
if _, err := serverStr.Write([]byte{i}); err != nil {
errChan <- err
return
}
time.Sleep(messageInterval)
}
}()
str, err := conn.AcceptUniStream(ctx)
require.NoError(t, err)
for i := uint8(1); i <= numMessages; i++ {
b := []byte{0}
n, err := str.Read(b)
require.NoError(t, err)
require.Equal(t, 1, n)
require.Equal(t, i, b[0])
}
numDropped := numDroppedPackets.Load()
t.Logf("dropped %d packets", numDropped)
require.NotZero(t, numDropped)
})
}
}
|
