global.go

   1 package torrent
   2
   3 import (
   4         "crypto"
   5         "expvar"
   6
   7         pp "github.com/anacrolix/torrent/peer_protocol"
   8 )
   9
  10 const (
  11         pieceHash        = crypto.SHA1
  12         maxRequests      = 250    // Maximum pending requests we allow peers to send us.
  13         defaultChunkSize = 0x4000 // 16KiB
  14
  15         // These are our extended message IDs. Peers will use these values to
  16         // select which extension a message is intended for.
  17         metadataExtendedId = iota + 1 // 0 is reserved for deleting keys
  18         pexExtendedId
  19 )
  20
  21 func defaultPeerExtensionBytes() PeerExtensionBits {
  22         return pp.NewPeerExtensionBytes(pp.ExtensionBitDHT, pp.ExtensionBitExtended, pp.ExtensionBitFast)
  23 }
  24
  25 // I could move a lot of these counters to their own file, but I suspect they
  26 // may be attached to a Client someday.
  27 var (
  28         torrent = expvar.NewMap("torrent")
  29
  30         peersAddedBySource = expvar.NewMap("peersAddedBySource")
  31
  32         pieceHashedCorrect    = expvar.NewInt("pieceHashedCorrect")
  33         pieceHashedNotCorrect = expvar.NewInt("pieceHashedNotCorrect")
  34
  35         peerExtensions                    = expvar.NewMap("peerExtensions")
  36         completedHandshakeConnectionFlags = expvar.NewMap("completedHandshakeConnectionFlags")
  37         // Count of connections to peer with same client ID.
  38         connsToSelf                = expvar.NewInt("connsToSelf")
  39         receivedKeepalives         = expvar.NewInt("receivedKeepalives")
  40         supportedExtensionMessages = expvar.NewMap("supportedExtensionMessages")
  41         postedKeepalives           = expvar.NewInt("postedKeepalives")
  42         // Requests received for pieces we don't have.
  43         requestsReceivedForMissingPieces = expvar.NewInt("requestsReceivedForMissingPieces")
  44         requestedChunkLengths            = expvar.NewMap("requestedChunkLengths")
  45
  46         messageTypesReceived = expvar.NewMap("messageTypesReceived")
  47
  48         // Track the effectiveness of Torrent.connPieceInclinationPool.
  49         pieceInclinationsReused = expvar.NewInt("pieceInclinationsReused")
  50         pieceInclinationsNew    = expvar.NewInt("pieceInclinationsNew")
  51         pieceInclinationsPut    = expvar.NewInt("pieceInclinationsPut")
  52 )