13 "bitbucket.org/anacrolix/go.torrent/dht"
14 "bitbucket.org/anacrolix/go.torrent/util"
15 _ "bitbucket.org/anacrolix/go.torrent/util/profile"
18 type pingResponse struct {
24 tableFileName = flag.String("tableFile", "", "name of file for storing node info")
25 serveAddr = flag.String("serveAddr", ":0", "local UDP address")
26 infoHash = flag.String("infoHash", "", "torrent infohash")
29 quitting = make(chan struct{})
32 func loadTable() error {
33 if *tableFileName == "" {
36 f, err := os.Open(*tableFileName)
37 if os.IsNotExist(err) {
41 return fmt.Errorf("error opening table file: %s", err)
46 b := make([]byte, dht.CompactNodeInfoLen)
47 _, err := io.ReadFull(f, b)
52 return fmt.Errorf("error reading table file: %s", err)
55 err = ni.UnmarshalCompact(b)
57 return fmt.Errorf("error unmarshaling compact node info: %s", err)
62 log.Printf("loaded %d nodes from table file", added)
67 log.SetFlags(log.LstdFlags | log.Lshortfile)
69 switch len(*infoHash) {
72 _, err := fmt.Sscanf(*infoHash, "%x", infoHash)
77 log.Fatal("require 20 byte infohash")
80 s, err = dht.NewServer(&dht.ServerConfig{
88 log.Fatalf("error loading table: %s", err)
90 log.Printf("dht server on %s, ID is %x", s.LocalAddr(), s.IDString())
94 func saveTable() error {
95 goodNodes := s.Nodes()
96 if *tableFileName == "" {
97 if len(goodNodes) != 0 {
98 log.Print("good nodes were discarded because you didn't specify a table file")
102 f, err := os.OpenFile(*tableFileName, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0666)
104 return fmt.Errorf("error opening table file: %s", err)
107 for _, nodeInfo := range goodNodes {
108 var b [dht.CompactNodeInfoLen]byte
109 err := nodeInfo.PutCompact(b[:])
111 return fmt.Errorf("error compacting node info: %s", err)
113 _, err = f.Write(b[:])
115 return fmt.Errorf("error writing compact node info: %s", err)
118 log.Printf("saved %d nodes to table file", len(goodNodes))
122 func setupSignals() {
123 ch := make(chan os.Signal)
124 signal.Notify(ch, os.Interrupt)
133 util.LoggedHTTPServe("")
134 seen := make(map[util.CompactPeer]struct{})
137 ps, err := s.GetPeers(*infoHash)
142 for v := range ps.Values {
143 log.Printf("received %d peers from %x", len(v.Peers), v.NodeInfo.ID)
144 for _, p := range v.Peers {
145 if _, ok := seen[p]; ok {
149 fmt.Println((&net.UDPAddr{
157 case <-time.After(15 * time.Second):
162 if err := saveTable(); err != nil {
163 log.Printf("error saving node table: %s", err)