102 lines
3.0 KiB
Go
102 lines
3.0 KiB
Go
// Copyright 2020 The gVisor Authors.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package udp_send_recv_dgram_test
|
|
|
|
import (
|
|
"flag"
|
|
"math/rand"
|
|
"net"
|
|
"testing"
|
|
"time"
|
|
|
|
"golang.org/x/sys/unix"
|
|
tb "gvisor.dev/gvisor/test/packetimpact/testbench"
|
|
)
|
|
|
|
func init() {
|
|
tb.RegisterFlags(flag.CommandLine)
|
|
}
|
|
|
|
func generateRandomPayload(t *testing.T, n int) string {
|
|
t.Helper()
|
|
buf := make([]byte, n)
|
|
if _, err := rand.Read(buf); err != nil {
|
|
t.Fatalf("rand.Read(buf) failed: %s", err)
|
|
}
|
|
return string(buf)
|
|
}
|
|
|
|
func TestUDPRecv(t *testing.T) {
|
|
dut := tb.NewDUT(t)
|
|
defer dut.TearDown()
|
|
boundFD, remotePort := dut.CreateBoundSocket(unix.SOCK_DGRAM, unix.IPPROTO_UDP, net.ParseIP("0.0.0.0"))
|
|
defer dut.Close(boundFD)
|
|
conn := tb.NewUDPIPv4(t, tb.UDP{DstPort: &remotePort}, tb.UDP{SrcPort: &remotePort})
|
|
defer conn.Close()
|
|
|
|
testCases := []struct {
|
|
name string
|
|
payload string
|
|
}{
|
|
{"emptypayload", ""},
|
|
{"small payload", "hello world"},
|
|
{"1kPayload", generateRandomPayload(t, 1<<10)},
|
|
// Even though UDP allows larger dgrams we don't test it here as
|
|
// they need to be fragmented and written out as individual
|
|
// frames.
|
|
}
|
|
for _, tc := range testCases {
|
|
t.Run(tc.name, func(t *testing.T) {
|
|
frame := conn.CreateFrame(&tb.UDP{}, &tb.Payload{Bytes: []byte(tc.payload)})
|
|
conn.SendFrame(frame)
|
|
if got, want := string(dut.Recv(boundFD, int32(len(tc.payload)), 0)), tc.payload; got != want {
|
|
t.Fatalf("received payload does not match sent payload got: %s, want: %s", got, want)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestUDPSend(t *testing.T) {
|
|
dut := tb.NewDUT(t)
|
|
defer dut.TearDown()
|
|
boundFD, remotePort := dut.CreateBoundSocket(unix.SOCK_DGRAM, unix.IPPROTO_UDP, net.ParseIP("0.0.0.0"))
|
|
defer dut.Close(boundFD)
|
|
conn := tb.NewUDPIPv4(t, tb.UDP{DstPort: &remotePort}, tb.UDP{SrcPort: &remotePort})
|
|
defer conn.Close()
|
|
|
|
testCases := []struct {
|
|
name string
|
|
payload string
|
|
}{
|
|
{"emptypayload", ""},
|
|
{"small payload", "hello world"},
|
|
{"1kPayload", generateRandomPayload(t, 1<<10)},
|
|
// Even though UDP allows larger dgrams we don't test it here as
|
|
// they need to be fragmented and written out as individual
|
|
// frames.
|
|
}
|
|
for _, tc := range testCases {
|
|
t.Run(tc.name, func(t *testing.T) {
|
|
conn.Drain()
|
|
if got, want := int(dut.SendTo(boundFD, []byte(tc.payload), 0, conn.LocalAddr())), len(tc.payload); got != want {
|
|
t.Fatalf("short write got: %d, want: %d", got, want)
|
|
}
|
|
if _, err := conn.ExpectData(tb.UDP{SrcPort: &remotePort}, tb.Payload{Bytes: []byte(tc.payload)}, 1*time.Second); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
})
|
|
}
|
|
}
|