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kcpwrapper_test.go
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kcpwrapper_test.go
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package kcpwrapper
import (
"context"
"crypto/tls"
"fmt"
"io"
"net"
"sync/atomic"
"testing"
"time"
"github.com/getlantern/fdcount"
"github.com/getlantern/keyman"
"github.com/stretchr/testify/assert"
)
const (
numClients = 100
)
func TestRoundTrip(t *testing.T) {
_, fdc, err := fdcount.Matching("TCP")
if err != nil {
t.Fatal(err)
}
defer func() {
assert.NoError(t, fdc.AssertDelta(0))
}()
pk, err := keyman.GeneratePK(2048)
if !assert.NoError(t, err) {
return
}
cert, err := pk.TLSCertificateFor(time.Now().Add(365*24*time.Hour), true, nil, "kcpwrapper", "127.0.0.1")
keypair, err := tls.X509KeyPair(cert.PEMEncoded(), pk.PEMEncoded())
cfg := CommonConfig{
DataShard: 10,
Interval: 50,
MTU: 1350,
SockBuf: 4194304,
ParityShard: 3,
SndWnd: 128,
Mode: "fast2",
Crypt: "salsa20",
Key: "Lz7VwgTlp52dg9xWulDJlJzytniVerfSbOQdsAUPrnk=",
RcvWnd: 512,
KeepAlive: 10,
}
lcfg := &ListenerConfig{
CommonConfig: cfg,
Listen: ":0",
}
dcfg := &DialerConfig{
CommonConfig: cfg,
Conn: 1,
ScavengeTTL: 600,
}
acceptedConns := int64(0)
_l, err := Listen(lcfg, func(conn net.Conn) net.Conn {
atomic.AddInt64(&acceptedConns, 1)
return conn
})
if !assert.NoError(t, err) {
return
}
l := tls.NewListener(_l, &tls.Config{
Certificates: []tls.Certificate{keypair},
})
defer l.Close()
go func() {
for {
conn, acceptErr := l.Accept()
if acceptErr != nil {
log.Debugf("Unable to accept: %v", acceptErr)
continue
}
go io.Copy(conn, conn)
}
}()
resultCh := make(chan error, numClients)
for i := 0; i < numClients; i++ {
echoText := fmt.Sprintf("Hello Number %d", i)
go func() {
_conn, err := Dialer(dcfg, nil)(context.Background(), l.Addr().String())
if err != nil {
resultCh <- err
}
conn := tls.Client(_conn, &tls.Config{
ServerName: "127.0.0.1",
RootCAs: cert.PoolContainingCert(),
})
defer conn.Close()
_, err = conn.Write([]byte(echoText))
if err != nil {
resultCh <- err
}
b := make([]byte, len(echoText))
_, err = io.ReadFull(conn, b)
if err != nil {
resultCh <- err
}
if echoText != string(b) {
resultCh <- fmt.Errorf("Mismatched echo text")
}
resultCh <- nil
}()
}
for i := 0; i < numClients; i++ {
assert.NoError(t, <-resultCh)
}
assert.EqualValues(t, numClients, atomic.LoadInt64(&acceptedConns))
}