tracker/udp_test.go

   1 package tracker
   2
   3 import (
   4         "bytes"
   5         "crypto/rand"
   6         "encoding/binary"
   7         "fmt"
   8         "io"
   9         "io/ioutil"
  10         "net"
  11         "net/url"
  12         "strings"
  13         "sync"
  14         "testing"
  15
  16         "github.com/stretchr/testify/assert"
  17         "github.com/stretchr/testify/require"
  18
  19         "github.com/anacrolix/torrent/util"
  20 )
  21
  22 // Ensure net.IPs are stored big-endian, to match the way they're read from
  23 // the wire.
  24 func TestNetIPv4Bytes(t *testing.T) {
  25         ip := net.IP([]byte{127, 0, 0, 1})
  26         if ip.String() != "127.0.0.1" {
  27                 t.FailNow()
  28         }
  29         if string(ip) != "\x7f\x00\x00\x01" {
  30                 t.Fatal([]byte(ip))
  31         }
  32 }
  33
  34 func TestMarshalAnnounceResponse(t *testing.T) {
  35         peers := util.CompactIPv4Peers{
  36                 {[]byte{127, 0, 0, 1}, 2},
  37                 {[]byte{255, 0, 0, 3}, 4},
  38         }
  39         b, err := peers.MarshalBinary()
  40         require.NoError(t, err)
  41         require.EqualValues(t,
  42                 "\x7f\x00\x00\x01\x00\x02\xff\x00\x00\x03\x00\x04",
  43                 b)
  44         require.EqualValues(t, 12, binary.Size(AnnounceResponseHeader{}))
  45 }
  46
  47 // Failure to write an entire packet to UDP is expected to given an error.
  48 func TestLongWriteUDP(t *testing.T) {
  49         t.Parallel()
  50         l, err := net.ListenUDP("udp", nil)
  51         defer l.Close()
  52         if err != nil {
  53                 t.Fatal(err)
  54         }
  55         c, err := net.DialUDP("udp", nil, l.LocalAddr().(*net.UDPAddr))
  56         if err != nil {
  57                 t.Fatal(err)
  58         }
  59         defer c.Close()
  60         for msgLen := 1; ; msgLen *= 2 {
  61                 n, err := c.Write(make([]byte, msgLen))
  62                 if err != nil {
  63                         require.Contains(t, err.Error(), "message too long")
  64                         return
  65                 }
  66                 if n < msgLen {
  67                         t.FailNow()
  68                 }
  69         }
  70 }
  71
  72 func TestShortBinaryRead(t *testing.T) {
  73         var data ResponseHeader
  74         err := binary.Read(bytes.NewBufferString("\x00\x00\x00\x01"), binary.BigEndian, &data)
  75         if err != io.ErrUnexpectedEOF {
  76                 t.FailNow()
  77         }
  78 }
  79
  80 func TestConvertInt16ToInt(t *testing.T) {
  81         i := 50000
  82         if int(uint16(int16(i))) != 50000 {
  83                 t.FailNow()
  84         }
  85 }
  86
  87 func TestAnnounceLocalhost(t *testing.T) {
  88         t.Parallel()
  89         srv := server{
  90                 t: map[[20]byte]torrent{
  91                         [20]byte{0xa3, 0x56, 0x41, 0x43, 0x74, 0x23, 0xe6, 0x26, 0xd9, 0x38, 0x25, 0x4a, 0x6b, 0x80, 0x49, 0x10, 0xa6, 0x67, 0xa, 0xc1}: {
  92                                 Seeders:  1,
  93                                 Leechers: 2,
  94                                 Peers: []util.CompactPeer{
  95                                         {[]byte{1, 2, 3, 4}, 5},
  96                                         {[]byte{6, 7, 8, 9}, 10},
  97                                 },
  98                         },
  99                 },
 100         }
 101         var err error
 102         srv.pc, err = net.ListenPacket("udp", ":0")
 103         require.NoError(t, err)
 104         defer srv.pc.Close()
 105         tr, err := New(fmt.Sprintf("udp://%s/announce", srv.pc.LocalAddr().String()))
 106         require.NoError(t, err)
 107         go func() {
 108                 require.NoError(t, srv.serveOne())
 109         }()
 110         err = tr.Connect()
 111         require.NoError(t, err)
 112         req := AnnounceRequest{
 113                 NumWant: -1,
 114                 Event:   Started,
 115         }
 116         rand.Read(req.PeerId[:])
 117         copy(req.InfoHash[:], []uint8{0xa3, 0x56, 0x41, 0x43, 0x74, 0x23, 0xe6, 0x26, 0xd9, 0x38, 0x25, 0x4a, 0x6b, 0x80, 0x49, 0x10, 0xa6, 0x67, 0xa, 0xc1})
 118         go func() {
 119                 require.NoError(t, srv.serveOne())
 120         }()
 121         ar, err := tr.Announce(&req)
 122         require.NoError(t, err)
 123         assert.EqualValues(t, 1, ar.Seeders)
 124         assert.EqualValues(t, 2, len(ar.Peers))
 125 }
 126
 127 func TestUDPTracker(t *testing.T) {
 128         t.Parallel()
 129         tr, err := New("udp://tracker.openbittorrent.com:80/announce")
 130         require.NoError(t, err)
 131         if testing.Short() {
 132                 t.SkipNow()
 133         }
 134         if err := tr.Connect(); err != nil {
 135                 if strings.Contains(err.Error(), "no such host") {
 136                         t.Skip(err)
 137                 }
 138                 if strings.Contains(err.Error(), "i/o timeout") {
 139                         t.Skip(err)
 140                 }
 141                 t.Fatal(err)
 142         }
 143         req := AnnounceRequest{
 144                 NumWant: -1,
 145                 // Event:   Started,
 146         }
 147         rand.Read(req.PeerId[:])
 148         copy(req.InfoHash[:], []uint8{0xa3, 0x56, 0x41, 0x43, 0x74, 0x23, 0xe6, 0x26, 0xd9, 0x38, 0x25, 0x4a, 0x6b, 0x80, 0x49, 0x10, 0xa6, 0x67, 0xa, 0xc1})
 149         ar, err := tr.Announce(&req)
 150         if ne, ok := err.(net.Error); ok {
 151                 if ne.Timeout() {
 152                         t.Skip(err)
 153                 }
 154         }
 155         require.NoError(t, err)
 156         t.Log(ar)
 157 }
 158
 159 func TestAnnounceRandomInfoHashThirdParty(t *testing.T) {
 160         t.Parallel()
 161         if testing.Short() {
 162                 // This test involves contacting third party servers that may have
 163                 // unpreditable results.
 164                 t.SkipNow()
 165         }
 166         req := AnnounceRequest{
 167                 Event: Stopped,
 168         }
 169         rand.Read(req.PeerId[:])
 170         rand.Read(req.InfoHash[:])
 171         wg := sync.WaitGroup{}
 172         success := make(chan bool)
 173         fail := make(chan struct{})
 174         for _, url := range []string{
 175                 "udp://tracker.openbittorrent.com:80/announce",
 176                 "udp://tracker.publicbt.com:80",
 177                 "udp://tracker.istole.it:6969",
 178                 "udp://tracker.ccc.de:80",
 179                 "udp://tracker.open.demonii.com:1337",
 180                 "udp://open.demonii.com:1337",
 181                 "udp://exodus.desync.com:6969",
 182         } {
 183                 wg.Add(1)
 184                 go func(url string) {
 185                         defer wg.Done()
 186                         tr, err := New(url)
 187                         if err != nil {
 188                                 t.Fatal(err)
 189                         }
 190                         if err := tr.Connect(); err != nil {
 191                                 t.Log(err)
 192                                 return
 193                         }
 194                         resp, err := tr.Announce(&req)
 195                         if err != nil {
 196                                 t.Logf("error announcing to %s: %s", url, err)
 197                                 return
 198                         }
 199                         if resp.Leechers != 0 || resp.Seeders != 0 || len(resp.Peers) != 0 {
 200                                 // The info hash we generated was random in 2^160 space. If we
 201                                 // get a hit, something is weird.
 202                                 t.Fatal(resp)
 203                         }
 204                         t.Logf("announced to %s", url)
 205                         // TODO: Can probably get stuck here, but it's just a throwaway
 206                         // test.
 207                         success <- true
 208                 }(url)
 209         }
 210         go func() {
 211                 wg.Wait()
 212                 close(fail)
 213         }()
 214         select {
 215         case <-fail:
 216                 // It doesn't matter if they all fail, the servers could just be down.
 217         case <-success:
 218                 // Bail as quickly as we can. One success is enough.
 219         }
 220 }
 221
 222 // Check that URLPath option is done correctly.
 223 func TestURLPathOption(t *testing.T) {
 224         conn, err := net.ListenUDP("udp", nil)
 225         if err != nil {
 226                 panic(err)
 227         }
 228         defer conn.Close()
 229         cl := newClient(&url.URL{
 230                 Host: conn.LocalAddr().String(),
 231                 Path: "/announce",
 232         })
 233         go func() {
 234                 err = cl.Connect()
 235                 if err != nil {
 236                         t.Fatal(err)
 237                 }
 238                 _, err = cl.Announce(&AnnounceRequest{})
 239                 if err != nil {
 240                         t.Fatal(err)
 241                 }
 242         }()
 243         var b [512]byte
 244         _, addr, _ := conn.ReadFrom(b[:])
 245         r := bytes.NewReader(b[:])
 246         var h RequestHeader
 247         read(r, &h)
 248         w := &bytes.Buffer{}
 249         write(w, ResponseHeader{
 250                 TransactionId: h.TransactionId,
 251         })
 252         write(w, ConnectionResponse{42})
 253         conn.WriteTo(w.Bytes(), addr)
 254         n, _, _ := conn.ReadFrom(b[:])
 255         r = bytes.NewReader(b[:n])
 256         read(r, &h)
 257         read(r, &AnnounceRequest{})
 258         all, _ := ioutil.ReadAll(r)
 259         if string(all) != "\x02\x09/announce" {
 260                 t.FailNow()
 261         }
 262         w = &bytes.Buffer{}
 263         write(w, ResponseHeader{
 264                 TransactionId: h.TransactionId,
 265         })
 266         write(w, AnnounceResponseHeader{})
 267         conn.WriteTo(w.Bytes(), addr)
 268 }