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// 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 control provides internal representations of socket control
// messages.
package control
import (
"testing"
"github.com/google/go-cmp/cmp"
"gvisor.dev/gvisor/pkg/abi/linux"
"gvisor.dev/gvisor/pkg/binary"
"gvisor.dev/gvisor/pkg/hostarch"
"gvisor.dev/gvisor/pkg/sentry/socket"
)
func TestParse(t *testing.T) {
// Craft the control message to parse.
length := linux.SizeOfControlMessageHeader + linux.SizeOfTimeval
hdr := linux.ControlMessageHeader{
Length: uint64(length),
Level: linux.SOL_SOCKET,
Type: linux.SO_TIMESTAMP,
}
buf := make([]byte, 0, length)
buf = binary.Marshal(buf, hostarch.ByteOrder, &hdr)
ts := linux.Timeval{
Sec: 2401,
Usec: 343,
}
buf = binary.Marshal(buf, hostarch.ByteOrder, &ts)
cmsg, err := Parse(nil, nil, buf, 8 /* width */)
if err != nil {
t.Fatalf("Parse(_, _, %+v, _): %v", cmsg, err)
}
want := socket.ControlMessages{
IP: socket.IPControlMessages{
HasTimestamp: true,
Timestamp: ts.ToNsecCapped(),
},
}
if diff := cmp.Diff(want, cmsg); diff != "" {
t.Errorf("unexpected message parsed, (-want, +got):\n%s", diff)
}
}
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