global.go

   1 package torrent
   2
   3 import (
   4         "crypto"
   5         "expvar"
   6 )
   7
   8 const (
   9         pieceHash        = crypto.SHA1
  10         maxRequests      = 250    // Maximum pending requests we allow peers to send us.
  11         defaultChunkSize = 0x4000 // 16KiB
  12
  13         // Justification for set bits follows.
  14         //
  15         // Extension protocol ([5]|=0x10):
  16         // http://www.bittorrent.org/beps/bep_0010.html
  17         //
  18         // Fast Extension ([7]|=0x04):
  19         // http://bittorrent.org/beps/bep_0006.html.
  20         // Disabled until AllowedFast is implemented. TODO
  21         //
  22         // DHT ([7]|=1):
  23         // http://www.bittorrent.org/beps/bep_0005.html
  24         defaultExtensionBytes = "\x00\x00\x00\x00\x00\x10\x00\x01"
  25
  26         // These are our extended message IDs. Peers will use these values to
  27         // select which extension a message is intended for.
  28         metadataExtendedId = iota + 1 // 0 is reserved for deleting keys
  29         pexExtendedId
  30 )
  31
  32 // I could move a lot of these counters to their own file, but I suspect they
  33 // may be attached to a Client someday.
  34 var (
  35         unwantedChunksReceived   = expvar.NewInt("chunksReceivedUnwanted")
  36         unexpectedChunksReceived = expvar.NewInt("chunksReceivedUnexpected")
  37         chunksReceived           = expvar.NewInt("chunksReceived")
  38
  39         peersAddedBySource = expvar.NewMap("peersAddedBySource")
  40
  41         uploadChunksPosted = expvar.NewInt("uploadChunksPosted")
  42         unexpectedCancels  = expvar.NewInt("unexpectedCancels")
  43
  44         pieceHashedCorrect    = expvar.NewInt("pieceHashedCorrect")
  45         pieceHashedNotCorrect = expvar.NewInt("pieceHashedNotCorrect")
  46
  47         unsuccessfulDials = expvar.NewInt("dialSuccessful")
  48         successfulDials   = expvar.NewInt("dialUnsuccessful")
  49
  50         acceptUTP    = expvar.NewInt("acceptUTP")
  51         acceptTCP    = expvar.NewInt("acceptTCP")
  52         acceptReject = expvar.NewInt("acceptReject")
  53
  54         peerExtensions                    = expvar.NewMap("peerExtensions")
  55         completedHandshakeConnectionFlags = expvar.NewMap("completedHandshakeConnectionFlags")
  56         // Count of connections to peer with same client ID.
  57         connsToSelf = expvar.NewInt("connsToSelf")
  58         // Number of completed connections to a client we're already connected with.
  59         duplicateClientConns       = expvar.NewInt("duplicateClientConns")
  60         receivedKeepalives         = expvar.NewInt("receivedKeepalives")
  61         supportedExtensionMessages = expvar.NewMap("supportedExtensionMessages")
  62         postedKeepalives           = expvar.NewInt("postedKeepalives")
  63         // Requests received for pieces we don't have.
  64         requestsReceivedForMissingPieces = expvar.NewInt("requestsReceivedForMissingPieces")
  65
  66         messageTypesReceived = expvar.NewMap("messageTypesReceived")
  67         messageTypesSent     = expvar.NewMap("messageTypesSent")
  68         messageTypesPosted   = expvar.NewMap("messageTypesPosted")
  69
  70         // Track the effectiveness of Torrent.connPieceInclinationPool.
  71         pieceInclinationsReused = expvar.NewInt("pieceInclinationsReused")
  72         pieceInclinationsNew    = expvar.NewInt("pieceInclinationsNew")
  73         pieceInclinationsPut    = expvar.NewInt("pieceInclinationsPut")
  74
  75         fillBufferSentCancels  = expvar.NewInt("fillBufferSentCancels")
  76         fillBufferSentRequests = expvar.NewInt("fillBufferSentRequests")
  77         numFillBuffers         = expvar.NewInt("numFillBuffers")
  78 )