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 // I could move a lot of these counters to their own file, but I suspect they
  28 // may be attached to a Client someday.
  29 var (
  30         torrent = expvar.NewMap("torrent")
  31
  32         pieceHashedCorrect    = expvar.NewInt("pieceHashedCorrect")
  33         pieceHashedNotCorrect = expvar.NewInt("pieceHashedNotCorrect")
  34
  35         completedHandshakeConnectionFlags = expvar.NewMap("completedHandshakeConnectionFlags")
  36         // Count of connections to peer with same client ID.
  37         connsToSelf        = expvar.NewInt("connsToSelf")
  38         receivedKeepalives = expvar.NewInt("receivedKeepalives")
  39         postedKeepalives   = expvar.NewInt("postedKeepalives")
  40         // Requests received for pieces we don't have.
  41         requestsReceivedForMissingPieces = expvar.NewInt("requestsReceivedForMissingPieces")
  42         requestedChunkLengths            = expvar.NewMap("requestedChunkLengths")
  43
  44         messageTypesReceived = expvar.NewMap("messageTypesReceived")
  45
  46         // Track the effectiveness of Torrent.connPieceInclinationPool.
  47         pieceInclinationsReused = expvar.NewInt("pieceInclinationsReused")
  48         pieceInclinationsNew    = expvar.NewInt("pieceInclinationsNew")
  49         pieceInclinationsPut    = expvar.NewInt("pieceInclinationsPut")
  50
  51         concurrentChunkWrites = expvar.NewInt("torrentConcurrentChunkWrites")
  52 )