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
  16 // These are our extended message IDs. Peers will use these values to
  17 // select which extension a message is intended for.
  18 const (
  19         metadataExtendedId = iota + 1 // 0 is reserved for deleting keys
  20         pexExtendedId
  21 )
  22
  23 func defaultPeerExtensionBytes() PeerExtensionBits {
  24         return pp.NewPeerExtensionBytes(pp.ExtensionBitDHT, pp.ExtensionBitExtended, pp.ExtensionBitFast)
  25 }
  26
  27 func init() {
  28         torrent.Set("peers supporting extension", &peersSupportingExtension)
  29 }
  30
  31 // I could move a lot of these counters to their own file, but I suspect they
  32 // may be attached to a Client someday.
  33 var (
  34         torrent                  = expvar.NewMap("torrent")
  35         peersSupportingExtension expvar.Map
  36
  37         pieceHashedCorrect    = expvar.NewInt("pieceHashedCorrect")
  38         pieceHashedNotCorrect = expvar.NewInt("pieceHashedNotCorrect")
  39
  40         completedHandshakeConnectionFlags = expvar.NewMap("completedHandshakeConnectionFlags")
  41         // Count of connections to peer with same client ID.
  42         connsToSelf        = expvar.NewInt("connsToSelf")
  43         receivedKeepalives = expvar.NewInt("receivedKeepalives")
  44         // Requests received for pieces we don't have.
  45         requestsReceivedForMissingPieces = expvar.NewInt("requestsReceivedForMissingPieces")
  46         requestedChunkLengths            = expvar.NewMap("requestedChunkLengths")
  47
  48         messageTypesReceived = expvar.NewMap("messageTypesReceived")
  49
  50         // Track the effectiveness of Torrent.connPieceInclinationPool.
  51         pieceInclinationsReused = expvar.NewInt("pieceInclinationsReused")
  52         pieceInclinationsNew    = expvar.NewInt("pieceInclinationsNew")
  53         pieceInclinationsPut    = expvar.NewInt("pieceInclinationsPut")
  54
  55         concurrentChunkWrites = expvar.NewInt("torrentConcurrentChunkWrites")
  56 )