status-go/vendor/github.com/anacrolix/torrent/global.go

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2022-03-10 09:44:48 +00:00
package torrent
import (
"crypto"
"expvar"
pp "github.com/anacrolix/torrent/peer_protocol"
)
const (
pieceHash = crypto.SHA1
defaultChunkSize = 0x4000 // 16KiB
// Arbitrary maximum of "metadata_size" (see https://www.bittorrent.org/beps/bep_0009.html)
// This value is 2x what libtorrent-rasterbar uses, which should be plenty
maxMetadataSize uint32 = 8 * 1024 * 1024
)
// These are our extended message IDs. Peers will use these values to
// select which extension a message is intended for.
const (
metadataExtendedId = iota + 1 // 0 is reserved for deleting keys
pexExtendedId
)
func defaultPeerExtensionBytes() PeerExtensionBits {
return pp.NewPeerExtensionBytes(pp.ExtensionBitDHT, pp.ExtensionBitExtended, pp.ExtensionBitFast)
}
func init() {
torrent.Set("peers supporting extension", &peersSupportingExtension)
torrent.Set("chunks received", &chunksReceived)
}
// I could move a lot of these counters to their own file, but I suspect they
// may be attached to a Client someday.
var (
torrent = expvar.NewMap("torrent")
peersSupportingExtension expvar.Map
chunksReceived expvar.Map
pieceHashedCorrect = expvar.NewInt("pieceHashedCorrect")
pieceHashedNotCorrect = expvar.NewInt("pieceHashedNotCorrect")
completedHandshakeConnectionFlags = expvar.NewMap("completedHandshakeConnectionFlags")
// Count of connections to peer with same client ID.
connsToSelf = expvar.NewInt("connsToSelf")
receivedKeepalives = expvar.NewInt("receivedKeepalives")
// Requests received for pieces we don't have.
requestsReceivedForMissingPieces = expvar.NewInt("requestsReceivedForMissingPieces")
requestedChunkLengths = expvar.NewMap("requestedChunkLengths")
messageTypesReceived = expvar.NewMap("messageTypesReceived")
// Track the effectiveness of Torrent.connPieceInclinationPool.
pieceInclinationsReused = expvar.NewInt("pieceInclinationsReused")
pieceInclinationsNew = expvar.NewInt("pieceInclinationsNew")
pieceInclinationsPut = expvar.NewInt("pieceInclinationsPut")
concurrentChunkWrites = expvar.NewInt("torrentConcurrentChunkWrites")
)