232 lines
5.9 KiB
Go
232 lines
5.9 KiB
Go
// Copyright 2018 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 p9
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import (
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"io/ioutil"
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"os"
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"testing"
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"gvisor.dev/gvisor/pkg/fd"
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"gvisor.dev/gvisor/pkg/unet"
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)
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const (
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MsgTypeBadEncode = iota + 252
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MsgTypeBadDecode
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MsgTypeUnregistered
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)
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func TestSendRecv(t *testing.T) {
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server, client, err := unet.SocketPair(false)
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if err != nil {
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t.Fatalf("socketpair got err %v expected nil", err)
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}
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defer server.Close()
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defer client.Close()
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if err := send(client, Tag(1), &Tlopen{}); err != nil {
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t.Fatalf("send got err %v expected nil", err)
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}
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tag, m, err := recv(server, maximumLength, msgRegistry.get)
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if err != nil {
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t.Fatalf("recv got err %v expected nil", err)
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}
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if tag != Tag(1) {
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t.Fatalf("got tag %v expected 1", tag)
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}
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if _, ok := m.(*Tlopen); !ok {
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t.Fatalf("got message %v expected *Tlopen", m)
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}
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}
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// badDecode overruns on decode.
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type badDecode struct{}
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func (*badDecode) Decode(b *buffer) { b.markOverrun() }
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func (*badDecode) Encode(b *buffer) {}
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func (*badDecode) Type() MsgType { return MsgTypeBadDecode }
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func (*badDecode) String() string { return "badDecode{}" }
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func TestRecvOverrun(t *testing.T) {
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server, client, err := unet.SocketPair(false)
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if err != nil {
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t.Fatalf("socketpair got err %v expected nil", err)
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}
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defer server.Close()
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defer client.Close()
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if err := send(client, Tag(1), &badDecode{}); err != nil {
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t.Fatalf("send got err %v expected nil", err)
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}
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if _, _, err := recv(server, maximumLength, msgRegistry.get); err == nil {
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t.Fatalf("recv got err %v expected ErrSocket{ErrNoValidMessage}", err)
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}
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}
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// unregistered is not registered on decode.
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type unregistered struct{}
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func (*unregistered) Decode(b *buffer) {}
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func (*unregistered) Encode(b *buffer) {}
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func (*unregistered) Type() MsgType { return MsgTypeUnregistered }
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func (*unregistered) String() string { return "unregistered{}" }
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func TestRecvInvalidType(t *testing.T) {
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server, client, err := unet.SocketPair(false)
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if err != nil {
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t.Fatalf("socketpair got err %v expected nil", err)
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}
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defer server.Close()
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defer client.Close()
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if err := send(client, Tag(1), &unregistered{}); err != nil {
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t.Fatalf("send got err %v expected nil", err)
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}
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_, _, err = recv(server, maximumLength, msgRegistry.get)
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if _, ok := err.(*ErrInvalidMsgType); !ok {
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t.Fatalf("recv got err %v expected ErrInvalidMsgType", err)
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}
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}
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func TestSendRecvWithFile(t *testing.T) {
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server, client, err := unet.SocketPair(false)
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if err != nil {
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t.Fatalf("socketpair got err %v expected nil", err)
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}
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defer server.Close()
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defer client.Close()
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// Create a tempfile.
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osf, err := ioutil.TempFile("", "p9")
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if err != nil {
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t.Fatalf("tempfile got err %v expected nil", err)
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}
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os.Remove(osf.Name())
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f, err := fd.NewFromFile(osf)
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osf.Close()
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if err != nil {
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t.Fatalf("unable to create file: %v", err)
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}
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rlopen := &Rlopen{}
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rlopen.SetFilePayload(f)
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if err := send(client, Tag(1), rlopen); err != nil {
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t.Fatalf("send got err %v expected nil", err)
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}
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// Enable withFile.
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tag, m, err := recv(server, maximumLength, msgRegistry.get)
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if err != nil {
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t.Fatalf("recv got err %v expected nil", err)
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}
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if tag != Tag(1) {
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t.Fatalf("got tag %v expected 1", tag)
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}
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rlopen, ok := m.(*Rlopen)
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if !ok {
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t.Fatalf("got m %v expected *Rlopen", m)
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}
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if rlopen.File == nil {
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t.Fatalf("got nil file expected non-nil")
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}
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}
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func TestRecvClosed(t *testing.T) {
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server, client, err := unet.SocketPair(false)
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if err != nil {
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t.Fatalf("socketpair got err %v expected nil", err)
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}
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defer server.Close()
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client.Close()
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_, _, err = recv(server, maximumLength, msgRegistry.get)
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if err == nil {
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t.Fatalf("got err nil expected non-nil")
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}
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if _, ok := err.(ErrSocket); !ok {
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t.Fatalf("got err %v expected ErrSocket", err)
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}
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}
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func TestSendClosed(t *testing.T) {
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server, client, err := unet.SocketPair(false)
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if err != nil {
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t.Fatalf("socketpair got err %v expected nil", err)
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}
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server.Close()
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defer client.Close()
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err = send(client, Tag(1), &Tlopen{})
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if err == nil {
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t.Fatalf("send got err nil expected non-nil")
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}
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if _, ok := err.(ErrSocket); !ok {
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t.Fatalf("got err %v expected ErrSocket", err)
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}
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}
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func BenchmarkSendRecv(b *testing.B) {
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server, client, err := unet.SocketPair(false)
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if err != nil {
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b.Fatalf("socketpair got err %v expected nil", err)
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}
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defer server.Close()
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defer client.Close()
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// Exchange Rflush messages since these contain no data and therefore incur
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// no additional marshaling overhead.
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go func() {
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for i := 0; i < b.N; i++ {
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tag, m, err := recv(server, maximumLength, msgRegistry.get)
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if err != nil {
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b.Fatalf("recv got err %v expected nil", err)
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}
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if tag != Tag(1) {
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b.Fatalf("got tag %v expected 1", tag)
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}
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if _, ok := m.(*Rflush); !ok {
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b.Fatalf("got message %T expected *Rflush", m)
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}
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if err := send(server, Tag(2), &Rflush{}); err != nil {
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b.Fatalf("send got err %v expected nil", err)
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}
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}
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}()
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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if err := send(client, Tag(1), &Rflush{}); err != nil {
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b.Fatalf("send got err %v expected nil", err)
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}
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tag, m, err := recv(client, maximumLength, msgRegistry.get)
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if err != nil {
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b.Fatalf("recv got err %v expected nil", err)
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}
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if tag != Tag(2) {
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b.Fatalf("got tag %v expected 2", tag)
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}
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if _, ok := m.(*Rflush); !ok {
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b.Fatalf("got message %v expected *Rflush", m)
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}
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}
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}
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func init() {
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msgRegistry.register(MsgTypeBadDecode, func() message { return &badDecode{} })
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}
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