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         // These are our extended message IDs. Peers will use these values to
  14         // select which extension a message is intended for.
  15         metadataExtendedId = iota + 1 // 0 is reserved for deleting keys
  16         pexExtendedId
  17 )
  18
  19 func defaultPeerExtensionBytes() peerExtensionBytes {
  20         return newPeerExtensionBytes(ExtensionBitDHT, ExtensionBitExtended)
  21 }
  22
  23 // I could move a lot of these counters to their own file, but I suspect they
  24 // may be attached to a Client someday.
  25 var (
  26         unwantedChunksReceived   = expvar.NewInt("chunksReceivedUnwanted")
  27         unexpectedChunksReceived = expvar.NewInt("chunksReceivedUnexpected")
  28         chunksReceived           = expvar.NewInt("chunksReceived")
  29
  30         peersAddedBySource = expvar.NewMap("peersAddedBySource")
  31
  32         uploadChunksPosted = expvar.NewInt("uploadChunksPosted")
  33         unexpectedCancels  = expvar.NewInt("unexpectedCancels")
  34
  35         pieceHashedCorrect    = expvar.NewInt("pieceHashedCorrect")
  36         pieceHashedNotCorrect = expvar.NewInt("pieceHashedNotCorrect")
  37
  38         unsuccessfulDials = expvar.NewInt("dialSuccessful")
  39         successfulDials   = expvar.NewInt("dialUnsuccessful")
  40
  41         acceptUTP    = expvar.NewInt("acceptUTP")
  42         acceptTCP    = expvar.NewInt("acceptTCP")
  43         acceptReject = expvar.NewInt("acceptReject")
  44
  45         peerExtensions                    = expvar.NewMap("peerExtensions")
  46         completedHandshakeConnectionFlags = expvar.NewMap("completedHandshakeConnectionFlags")
  47         // Count of connections to peer with same client ID.
  48         connsToSelf = expvar.NewInt("connsToSelf")
  49         // Number of completed connections to a client we're already connected with.
  50         duplicateClientConns       = expvar.NewInt("duplicateClientConns")
  51         receivedKeepalives         = expvar.NewInt("receivedKeepalives")
  52         supportedExtensionMessages = expvar.NewMap("supportedExtensionMessages")
  53         postedKeepalives           = expvar.NewInt("postedKeepalives")
  54         // Requests received for pieces we don't have.
  55         requestsReceivedForMissingPieces = expvar.NewInt("requestsReceivedForMissingPieces")
  56         requestedChunkLengths            = expvar.NewMap("requestedChunkLengths")
  57
  58         messageTypesReceived = expvar.NewMap("messageTypesReceived")
  59         messageTypesSent     = expvar.NewMap("messageTypesSent")
  60         messageTypesPosted   = expvar.NewMap("messageTypesPosted")
  61
  62         // Track the effectiveness of Torrent.connPieceInclinationPool.
  63         pieceInclinationsReused = expvar.NewInt("pieceInclinationsReused")
  64         pieceInclinationsNew    = expvar.NewInt("pieceInclinationsNew")
  65         pieceInclinationsPut    = expvar.NewInt("pieceInclinationsPut")
  66
  67         fillBufferSentCancels  = expvar.NewInt("fillBufferSentCancels")
  68         fillBufferSentRequests = expvar.NewInt("fillBufferSentRequests")
  69         numFillBuffers         = expvar.NewInt("numFillBuffers")
  70 )