connection_test.go

   1 package torrent
   2
   3 import (
   4         "io"
   5         "net"
   6         "sync"
   7         "testing"
   8         "time"
   9
  10         "github.com/anacrolix/missinggo/pubsub"
  11         "github.com/bradfitz/iter"
  12         "github.com/stretchr/testify/require"
  13
  14         "github.com/anacrolix/torrent/metainfo"
  15         pp "github.com/anacrolix/torrent/peer_protocol"
  16         "github.com/anacrolix/torrent/storage"
  17 )
  18
  19 // Ensure that no race exists between sending a bitfield, and a subsequent
  20 // Have that would potentially alter it.
  21 func TestSendBitfieldThenHave(t *testing.T) {
  22         r, w := io.Pipe()
  23         cl := Client{
  24                 config: &ClientConfig{DownloadRateLimiter: unlimited},
  25         }
  26         cl.initLogger()
  27         c := cl.newConnection(nil, false)
  28         c.setTorrent(cl.newTorrent(metainfo.Hash{}, nil))
  29         c.t.setInfo(&metainfo.Info{
  30                 Pieces: make([]byte, metainfo.HashSize*3),
  31         })
  32         c.r = r
  33         c.w = w
  34         go c.writer(time.Minute)
  35         c.mu().Lock()
  36         c.t.completedPieces.Add(1)
  37         c.PostBitfield( /*[]bool{false, true, false}*/ )
  38         c.mu().Unlock()
  39         c.mu().Lock()
  40         c.Have(2)
  41         c.mu().Unlock()
  42         b := make([]byte, 15)
  43         n, err := io.ReadFull(r, b)
  44         c.mu().Lock()
  45         // This will cause connection.writer to terminate.
  46         c.closed.Set()
  47         c.mu().Unlock()
  48         require.NoError(t, err)
  49         require.EqualValues(t, 15, n)
  50         // Here we see that the bitfield doesn't have piece 2 set, as that should
  51         // arrive in the following Have message.
  52         require.EqualValues(t, "\x00\x00\x00\x02\x05@\x00\x00\x00\x05\x04\x00\x00\x00\x02", string(b))
  53 }
  54
  55 type torrentStorage struct {
  56         writeSem sync.Mutex
  57 }
  58
  59 func (me *torrentStorage) Close() error { return nil }
  60
  61 func (me *torrentStorage) Piece(mp metainfo.Piece) storage.PieceImpl {
  62         return me
  63 }
  64
  65 func (me *torrentStorage) Completion() storage.Completion {
  66         return storage.Completion{}
  67 }
  68
  69 func (me *torrentStorage) MarkComplete() error {
  70         return nil
  71 }
  72
  73 func (me *torrentStorage) MarkNotComplete() error {
  74         return nil
  75 }
  76
  77 func (me *torrentStorage) ReadAt([]byte, int64) (int, error) {
  78         panic("shouldn't be called")
  79 }
  80
  81 func (me *torrentStorage) WriteAt(b []byte, _ int64) (int, error) {
  82         if len(b) != defaultChunkSize {
  83                 panic(len(b))
  84         }
  85         me.writeSem.Unlock()
  86         return len(b), nil
  87 }
  88
  89 func BenchmarkConnectionMainReadLoop(b *testing.B) {
  90         cl := &Client{
  91                 config: &ClientConfig{
  92                         DownloadRateLimiter: unlimited,
  93                 },
  94         }
  95         ts := &torrentStorage{}
  96         t := &Torrent{
  97                 cl:                cl,
  98                 storage:           &storage.Torrent{ts},
  99                 pieceStateChanges: pubsub.NewPubSub(),
 100         }
 101         require.NoError(b, t.setInfo(&metainfo.Info{
 102                 Pieces:      make([]byte, 20),
 103                 Length:      1 << 20,
 104                 PieceLength: 1 << 20,
 105         }))
 106         t.setChunkSize(defaultChunkSize)
 107         t.pendingPieces.Set(0, PiecePriorityNormal.BitmapPriority())
 108         r, w := net.Pipe()
 109         cn := cl.newConnection(r, true)
 110         cn.setTorrent(t)
 111         mrlErr := make(chan error)
 112         msg := pp.Message{
 113                 Type:  pp.Piece,
 114                 Piece: make([]byte, defaultChunkSize),
 115         }
 116         go func() {
 117                 cl.mu.Lock()
 118                 err := cn.mainReadLoop()
 119                 if err != nil {
 120                         mrlErr <- err
 121                 }
 122                 close(mrlErr)
 123         }()
 124         wb := msg.MustMarshalBinary()
 125         b.SetBytes(int64(len(msg.Piece)))
 126         go func() {
 127                 defer w.Close()
 128                 ts.writeSem.Lock()
 129                 for range iter.N(b.N) {
 130                         cl.mu.Lock()
 131                         // The chunk must be written to storage everytime, to ensure the
 132                         // writeSem is unlocked.
 133                         t.pieces[0].dirtyChunks.Clear()
 134                         cn.validReceiveChunks = map[request]struct{}{newRequestFromMessage(&msg): struct{}{}}
 135                         cl.mu.Unlock()
 136                         n, err := w.Write(wb)
 137                         require.NoError(b, err)
 138                         require.EqualValues(b, len(wb), n)
 139                         ts.writeSem.Lock()
 140                 }
 141         }()
 142         require.NoError(b, <-mrlErr)
 143         require.EqualValues(b, b.N, cn.stats.ChunksReadUseful.Int64())
 144 }