mirror of
https://github.com/hanzoai/visor.git
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Kevin KrakauerandgVisor bot
507908d9fa
The change was originally motivated by ticket references (cl/450976957), which were never implemented. PiperOrigin-RevId: 617480960
115 lines
3.1 KiB
Go
115 lines
3.1 KiB
Go
// Copyright 2023 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package packet_test
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import (
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"bytes"
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"testing"
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"github.com/google/go-cmp/cmp"
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"gvisor.dev/gvisor/pkg/tcpip"
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"gvisor.dev/gvisor/pkg/tcpip/faketime"
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"gvisor.dev/gvisor/pkg/tcpip/header"
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"gvisor.dev/gvisor/pkg/tcpip/link/channel"
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"gvisor.dev/gvisor/pkg/tcpip/link/ethernet"
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"gvisor.dev/gvisor/pkg/tcpip/stack"
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"gvisor.dev/gvisor/pkg/tcpip/transport/raw"
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"gvisor.dev/gvisor/pkg/waiter"
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)
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func TestWriteRaw(t *testing.T) {
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const nicID = 1
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tests := []struct {
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name string
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len int
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expectErr tcpip.Error
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}{
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{
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name: "small",
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len: header.EthernetMinimumSize - 1,
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expectErr: &tcpip.ErrMalformedHeader{},
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},
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{
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name: "exact",
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len: header.EthernetMinimumSize,
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expectErr: nil,
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},
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{
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name: "bigger",
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len: header.EthernetMinimumSize + 1,
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expectErr: nil,
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},
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}
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for _, test := range tests {
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t.Run(test.name, func(t *testing.T) {
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s := stack.New(stack.Options{
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RawFactory: &raw.EndpointFactory{},
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AllowPacketEndpointWrite: true,
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Clock: &faketime.NullClock{},
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})
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defer s.Destroy()
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chEP := channel.New(1, header.IPv6MinimumMTU, "")
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if err := s.CreateNIC(nicID, ethernet.New(chEP)); err != nil {
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t.Errorf("CreateNIC(%d, _) failed: %s", nicID, err)
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}
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var wq waiter.Queue
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ep, err := s.NewPacketEndpoint(false /* cooked */, 0 /* netProto */, &wq)
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if err != nil {
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t.Fatalf("s.NewPacketEndpoint(false, 0, _): %s", err)
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}
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defer ep.Close()
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bindAddr := tcpip.FullAddress{NIC: nicID}
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if err := ep.Bind(bindAddr); err != nil {
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t.Fatalf("ep.Bind(%#v): %s", bindAddr, err)
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}
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data := make([]byte, test.len)
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for i := range data {
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data[i] = byte(i)
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}
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var r bytes.Reader
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r.Reset(data)
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n, err := ep.Write(&r, tcpip.WriteOptions{})
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if diff := cmp.Diff(test.expectErr, err); diff != "" {
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t.Fatalf("ep.Write(..) mismatch:\n%s", diff)
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}
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if test.expectErr != nil {
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return
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}
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if want := int64(len(data)); n != want {
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t.Errorf("got ep.Write(..) = %d, want = %d", n, want)
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}
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pkt := chEP.Read()
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if pkt == nil {
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t.Fatal("Packet wasn't written out")
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}
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defer pkt.DecRef()
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if diff := cmp.Diff(data, stack.PayloadSince(pkt.LinkHeader()).AsSlice()); diff != "" {
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t.Errorf("packet data mismatch:\n%s", diff)
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}
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if len := len(pkt.LinkHeader().Slice()); len != header.EthernetMinimumSize {
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t.Errorf("got len(pkt.LinkHeader().Slice()) = %d, want = %d", len, header.EthernetMinimumSize)
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}
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})
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}
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}
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