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package self_test
import (
"bufio"
"bytes"
"context"
"fmt"
"io"
mrand "math/rand/v2"
"sync"
"testing"
"time"
"github.com/quic-go/quic-go"
"github.com/quic-go/quic-go/internal/protocol"
"github.com/quic-go/quic-go/internal/utils"
"github.com/quic-go/quic-go/logging"
"github.com/quic-go/quic-go/metrics"
"github.com/quic-go/quic-go/qlog"
"github.com/stretchr/testify/require"
)
func TestTracerHandshake(t *testing.T) {
addTracers := func(pers protocol.Perspective, conf *quic.Config) *quic.Config {
enableQlog := mrand.Int()%2 != 0
enableMetrics := mrand.Int()%2 != 0
enableCustomTracer := mrand.Int()%2 != 0
t.Logf("%s using qlog: %t, metrics: %t, custom: %t", pers, enableQlog, enableMetrics, enableCustomTracer)
var tracerConstructors []func(context.Context, logging.Perspective, quic.ConnectionID) *logging.ConnectionTracer
if enableQlog {
tracerConstructors = append(tracerConstructors, func(_ context.Context, p logging.Perspective, connID quic.ConnectionID) *logging.ConnectionTracer {
if mrand.Int()%2 == 0 { // simulate that a qlog collector might only want to log some connections
t.Logf("%s qlog tracer deciding to not trace connection %s", p, connID)
return nil
}
t.Logf("%s qlog tracing connection %s", p, connID)
return qlog.NewConnectionTracer(utils.NewBufferedWriteCloser(bufio.NewWriter(&bytes.Buffer{}), io.NopCloser(nil)), p, connID)
})
}
if enableMetrics {
tracerConstructors = append(tracerConstructors, metrics.DefaultConnectionTracer)
}
if enableCustomTracer {
tracerConstructors = append(tracerConstructors, func(context.Context, logging.Perspective, quic.ConnectionID) *logging.ConnectionTracer {
return &logging.ConnectionTracer{}
})
}
c := conf.Clone()
c.Tracer = func(ctx context.Context, p logging.Perspective, connID quic.ConnectionID) *logging.ConnectionTracer {
tracers := make([]*logging.ConnectionTracer, 0, len(tracerConstructors))
for _, c := range tracerConstructors {
if tr := c(ctx, p, connID); tr != nil {
tracers = append(tracers, tr)
}
}
return logging.NewMultiplexedConnectionTracer(tracers...)
}
return c
}
for i := 0; i < 3; i++ {
t.Run(fmt.Sprintf("run %d", i+1), func(t *testing.T) {
if enableQlog {
t.Skip("This test sets tracers and won't produce any qlogs.")
}
quicClientConf := addTracers(protocol.PerspectiveClient, getQuicConfig(nil))
quicServerConf := addTracers(protocol.PerspectiveServer, getQuicConfig(nil))
ln, err := quic.Listen(newUDPConnLocalhost(t), getTLSConfig(), quicServerConf)
require.NoError(t, err)
t.Cleanup(func() { require.NoError(t, ln.Close()) })
var wg sync.WaitGroup
for j := 0; j < 3; j++ {
wg.Add(1)
go func() {
defer wg.Done()
ctx, cancel := context.WithTimeout(context.Background(), time.Second)
defer cancel()
conn, err := quic.Dial(ctx, newUDPConnLocalhost(t), ln.Addr(), getTLSClientConfig(), quicClientConf)
require.NoError(t, err)
defer conn.CloseWithError(0, "")
sconn, err := ln.Accept(ctx)
if err != nil {
return
}
sstr, err := sconn.OpenUniStream()
require.NoError(t, err)
_, err = sstr.Write(PRData)
require.NoError(t, err)
require.NoError(t, sstr.Close())
str, err := conn.AcceptUniStream(ctx)
require.NoError(t, err)
data, err := io.ReadAll(str)
require.NoError(t, err)
require.Equal(t, PRData, data)
}()
}
wg.Wait()
})
}
}
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