func main() {
flag.Parse()
// To see logs, use the -logtostderr flag and change the verbosity with
// -v 0 (less verbose) up to -v 5 (more verbose).
if len(flag.Args()) != 1 {
fmt.Fprintf(os.Stderr, "Usage: %v <infohash>\n\n", os.Args[0])
fmt.Fprintf(os.Stderr, "Example infohash: %v\n", exampleIH)
flag.PrintDefaults()
os.Exit(1)
}
ih, err := dht.DecodeInfoHash(flag.Args()[0])
if err != nil {
fmt.Fprintf(os.Stderr, "DecodeInfoHash error: %v\n", err)
os.Exit(1)
}
// Starts a DHT node with the default options. It picks a random UDP port. To change this, see dht.NewConfig.
d, err := dht.New(nil)
if err != nil {
fmt.Fprintf(os.Stderr, "New DHT error: %v", err)
os.Exit(1)
}
// For debugging.
go http.ListenAndServe(fmt.Sprintf(":%d", httpPortTCP), nil)
go d.Run()
go drainresults(d)
for {
d.PeersRequest(string(ih), false)
time.Sleep(5 * time.Second)
}
}
// Sets up the DHT node for peer bootstrapping
func (self *DHT) Init() error {
sum := sha1.Sum([]byte(self.Config.Info))
// Create a hex encoded sha1 sum of a string to be used for DH
infoHash, err := dht.DecodeInfoHash(hex.EncodeToString(sum[:]))
if err != nil {
return err
}
cfg := dht.NewConfig()
cfg.Port = self.Config.port
cfg.NumTargetPeers = self.Config.DesiredPeers
d, err := dht.New(cfg)
if err != nil {
return err
}
self.InfoHash = infoHash
self.DHT = d
if self.Config.Disabled {
// We have to initialize the DHT anyway because daemon loop needs
// to read from its initialized chans. As long as Start() is prevented,
// the DHT will not run.
logger.Info("DHT is disabled")
} else {
logger.Info("Init DHT on port %d", self.Config.port)
}
return nil
}
func DiscoverPeers(cm *network.ConnectionManager, address string) {
// Hex encoded string: "The Distributed Bay!"
ih, err := dht.DecodeInfoHash("5468652044697374726962757465642042617921")
if err != nil {
log.Fatalf("DHT DecodeInfoHash error: %v\n", err)
}
_, portStr, err := net.SplitHostPort(address)
if err != nil {
log.Fatal("Bind address error!", err)
}
port, err := strconv.Atoi(portStr)
if err != nil {
log.Fatal(err)
}
config := dht.NewConfig()
config.Port = port
config.NumTargetPeers = 10
node, err := dht.New(config)
if err != nil {
log.Fatal("Error creating DHT node!")
}
go node.Run()
go checkPeers(node, cm)
log.Println("Requesting peers from the DHT!")
for {
node.PeersRequest(string(ih), true)
time.Sleep(15 * time.Second)
}
}
func downloadManager(d *dht.DHT, filesToDownload <-chan string, finished chan<- bool) {
currentDownloads := make(map[dht.InfoHash]chan []string)
downloadEvents := make(chan downloadEvent)
for {
select {
case newInfoHashString := <-filesToDownload:
newFile, err := dht.DecodeInfoHash(newInfoHashString)
if err != nil {
//TODO: better error handling
log.Errorf("WINSTON: DecodeInfoHash error: %v\n", err)
}
if _, ok := currentDownloads[newFile]; ok {
log.V(3).Infof("WINSTON: File %x is already downloading, skipping...\n", newFile)
continue
}
log.V(3).Infof("WINSTON: Accepted %x for download...\n", newFile)
// Create a channel for all the found peers
currentDownloads[newFile] = make(chan []string)
bufferedPeerChannel := makePeerBuffer(currentDownloads[newFile])
// Ask that nice DHT fellow to find those peers :)
d.PeersRequest(string(newFile), false)
// Create a new gorouite that manages the download for the specific file
go downloadFile(newFile, bufferedPeerChannel, downloadEvents)
case newEvent := <-downloadEvents:
if newEvent.eventType == eventSucessfulDownload {
log.V(1).Infof("WINSTON: Download of %x completed :)\n", newEvent.infoHash)
} else if newEvent.eventType == eventTimeout {
log.V(1).Infof("WINSTON: Download of %x failed: time out :(\n", newEvent.infoHash)
}
close(currentDownloads[newEvent.infoHash])
delete(currentDownloads, newEvent.infoHash)
if len(currentDownloads) == 0 {
finished <- true
}
case newPeers, chanOk := <-d.PeersRequestResults:
if !chanOk {
// Something went wrong, mayday, mayday!
panic("WINSTON: BORK!\n")
}
for ih, peers := range newPeers {
// Check if download is still active
if currentPeersChan, ok := currentDownloads[ih]; ok {
log.V(3).Infof("WINSTON: Received %d new peers for file %x\n", len(peers), ih)
currentPeersChan <- peers
} else {
log.V(3).Infof("WINSTON: Received %d peers for non-current file %x (probably completed or timed out)\n", len(peers), ih)
}
}
}
}
}
func NewMetaInfoFromMagnet(torrent string) (m *MetaInfo, err error) {
magnet, err := parseMagnet(torrent)
if err != nil {
log.Println("Couldn't parse magnet: ", err)
return
}
ih, err := dht.DecodeInfoHash(magnet.InfoHashes[0])
if err != nil {
return
}
m = &MetaInfo{InfoHash: string(ih)}
return
}
func main() {
flag.Parse()
// Change to l4g.DEBUG to see *lots* of debugging information.
l4g.AddFilter("stdout", l4g.WARNING, l4g.NewConsoleLogWriter())
if len(flag.Args()) != 1 {
fmt.Fprintf(os.Stderr, "Usage: %v <infohash>\n\n", os.Args[0])
fmt.Fprintf(os.Stderr, "Example infohash: d1c5676ae7ac98e8b19f63565905105e3c4c37a2\n")
flag.PrintDefaults()
os.Exit(1)
}
ih, err := dht.DecodeInfoHash(flag.Args()[0])
if err != nil {
l4g.Critical("DecodeInfoHash error: %v\n", err)
os.Exit(1)
}
// This is a hint to the DHT of the minimum number of peers it will try to
// find for the given node. This is not a reliable limit. In the future this
// might be moved to "PeersRequest()", so the controlling client can have
// different targets at different moments or for different infohashes.
targetNumPeers := 5
d, err := dht.NewDHTNode(dhtPortUDP, targetNumPeers, false)
if err != nil {
l4g.Critical("NewDHTNode error: %v", err)
os.Exit(1)
}
// For debugging.
go http.ListenAndServe(fmt.Sprintf(":%d", httpPortTCP), nil)
go d.DoDHT()
go drainresults(d)
for {
// Give the DHT some time to "warm-up" its routing table.
time.Sleep(5 * time.Second)
d.PeersRequest(string(ih), false)
}
}
func main() {
// randomly generated hash: AE6D4306F4AE6D4306F4AE6D4306F4AE6D4306F4
// ubuntu-12.04.4-desktop-amd64.iso: deca7a89a1dbdc4b213de1c0d5351e92582f31fb
ih, err := dht.DecodeInfoHash("AE6D4306F4AE6D4306F4AE6D4306F4AE6D4306F4")
if err != nil {
fmt.Fprintf(os.Stderr, "DecodeInfoHash error: %v\n", err)
os.Exit(1)
}
// Starts a DHT node with the default options. It picks a random UDP port. To change this, see dht.NewConfig.
d, err := dht.New(nil)
if err != nil {
fmt.Fprintf(os.Stderr, "New DHT error: %v", err)
os.Exit(1)
}
go d.Run()
go drain(d)
for {
d.PeersRequest(string(ih), false)
time.Sleep(5 * time.Second)
}
}
func (d *DiscoveryDHT) Run() error {
var err error
d.ih, err = dht.DecodeInfoHash(d.localNode.Config().NetworkID)
if err != nil {
return fmt.Errorf("decode infohash err: %s", err)
}
config := dht.NewConfig()
config.Port = d.localNode.State().ListenPort
d.node, err = dht.New(config)
if err != nil {
return fmt.Errorf("new dht init err: %s", err)
}
if err = d.node.Start(); err != nil {
return fmt.Errorf("dht start err: %s", err)
}
d.waitGroup.Add(2)
go d.process()
go d.awaitPeers()
d.waitGroup.Wait()
return nil
}
// Requests peers from the DHT
func (self *DHT) RequestPeers(infoHashString string) {
if self.Config.Disabled {
return
}
sum := sha1.Sum([]byte(infoHashString))
// Create a hex encoded sha1 sum of a string to be used for DH
infoHash, err := dht.DecodeInfoHash(hex.EncodeToString(sum[:]))
if err != nil {
log.Panic()
}
ih := string(infoHash)
if ih == "" {
log.Panic("InfoHash is not initialized")
return
}
self.InfoHashes[ih] = infoHashString
logger.Info("Requesting DHT Peers: infoHashString= %s", infoHashString)
self.DHT.PeersRequest(ih, true)
}
func getMetaInfo(torrent string) (metaInfo *MetaInfo, err error) {
var input io.ReadCloser
if strings.HasPrefix(torrent, "http:") {
r, err := proxyHttpGet(torrent)
if err != nil {
return nil, err
}
input = r.Body
} else if strings.HasPrefix(torrent, "magnet:") {
magnet, err := parseMagnet(torrent)
if err != nil {
log.Println("Couldn't parse magnet: ", err)
return nil, err
}
ih, err := dht.DecodeInfoHash(magnet.InfoHashes[0])
if err != nil {
return nil, err
}
metaInfo = &MetaInfo{InfoHash: string(ih)}
return metaInfo, err
} else {
if input, err = os.Open(torrent); err != nil {
return
}
}
// We need to calcuate the sha1 of the Info map, including every value in the
// map. The easiest way to do this is to read the data using the Decode
// API, and then pick through it manually.
var m interface{}
m, err = bencode.Decode(input)
input.Close()
if err != nil {
err = errors.New("Couldn't parse torrent file phase 1: " + err.Error())
return
}
topMap, ok := m.(map[string]interface{})
if !ok {
err = errors.New("Couldn't parse torrent file phase 2.")
return
}
infoMap, ok := topMap["info"]
if !ok {
err = errors.New("Couldn't parse torrent file. info")
return
}
var b bytes.Buffer
if err = bencode.Marshal(&b, infoMap); err != nil {
return
}
hash := sha1.New()
hash.Write(b.Bytes())
var m2 MetaInfo
err = bencode.Unmarshal(&b, &m2.Info)
if err != nil {
return
}
m2.InfoHash = string(hash.Sum(nil))
m2.Announce = getString(topMap, "announce")
m2.AnnounceList = getSliceSliceString(topMap, "announce-list")
m2.CreationDate = getString(topMap, "creation date")
m2.Comment = getString(topMap, "comment")
m2.CreatedBy = getString(topMap, "created by")
m2.Encoding = getString(topMap, "encoding")
metaInfo = &m2
return
}
func main() {
ipv6Address := flag.String("v6", "", "Address to bind to IPv6 interface")
flag.Parse()
// To see logs, use the -logtostderr flag and change the verbosity with
// -v 0 (less verbose) up to -v 5 (more verbose).
if len(flag.Args()) != 1 {
fmt.Fprintf(os.Stderr, "Usage: %v <infohash>\n\n", os.Args[0])
fmt.Fprintf(os.Stderr, "Example infohash: %v\n", exampleIH)
flag.PrintDefaults()
os.Exit(1)
}
ih, err := dht.DecodeInfoHash(flag.Args()[0])
if err != nil {
fmt.Fprintf(os.Stderr, "DecodeInfoHash error: %v\n", err)
os.Exit(1)
}
conf4 := dht.NewConfig()
conf4.UDPProto = "udp4"
conf4.Port = 8445
// standard IPv4 bootstrap nodes = dht.transmissionbt.com
// router.utorrent.com router.bittorrent.com
conf6 := dht.NewConfig()
conf6.UDPProto = "udp6"
conf6.Port = 8445
conf6.Address = *ipv6Address
// Starts a DHT node with the default options. It picks a random UDP port. To change this, see dht.NewConfig.
d4, err := dht.New(conf4)
if err != nil {
fmt.Fprintf(os.Stderr, "New DHT error: %v", err)
os.Exit(1)
}
var d6 *dht.DHT
if len(*ipv6Address) > 1 {
fmt.Printf("Tring to bind to IPv6=%s\n", *ipv6Address)
d6, err = dht.New(conf6)
if err != nil {
fmt.Fprintf(os.Stderr, "New DHT error: %v", err)
os.Exit(1)
}
if err = d6.Start(); err != nil {
fmt.Fprintf(os.Stderr, "DHT start error: %v", err)
os.Exit(1)
}
go drainresults(d6)
} else {
fmt.Fprintf(os.Stderr, "Not binding to IPv6 interface. If desired pass -v6=[address] for the\n")
fmt.Fprintf(os.Stderr, "address you want the DHT to bind to. Privacy addresses are not recommended\n")
fmt.Fprintf(os.Stderr, "Since they can expire and connections will fail\n\n")
}
// For debugging.
go http.ListenAndServe(fmt.Sprintf(":%d", httpPortTCP), nil)
if err = d4.Start(); err != nil {
fmt.Fprintf(os.Stderr, "DHT start error: %v", err)
os.Exit(1)
}
go drainresults(d4)
for {
d4.PeersRequest(string(ih), true)
if len(*ipv6Address) > 1 {
d6.PeersRequest(string(ih), true)
}
time.Sleep(5 * time.Second)
}
}
