piece

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Published: May 6, 2022 License: MIT Imports: 6 Imported by: 0

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Constants

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const BlockSize = 16 * 1024

BlockSize is the size of smallest piece data that we are going to request from peers.

Variables

This section is empty.

Functions

This section is empty.

Types

type Block

type Block struct {
	Index  int    // index in piece
	Begin  uint32 // offset in piece
	Length uint32 // always equal to BlockSize except the last block of a piece.
}

Block is part of a Piece that is specified in peerprotocol.Request messages.

type Piece

type Piece struct {
	Index   uint32            // index in torrent
	Length  uint32            // always equal to Info.PieceLength except last piece
	Data    filesection.Piece // the place to write downloaded bytes
	Hash    []byte
	Writing bool
	Done    bool
}

Piece of a torrent.

func NewPieces

func NewPieces(info *metainfo.Info, files []allocator.File) []Piece

NewPieces returns a slice of Pieces by mapping files to the pieces.

func (*Piece) FindBlock added in v0.3.8

func (p *Piece) FindBlock(begin, length uint32) (b Block, ok bool)

FindBlock returns the block at offset `begin` and length `length`.

func (*Piece) GetBlock added in v0.3.8

func (p *Piece) GetBlock(i int) (b Block, ok bool)

GetBlock returns the Block at index i.

func (*Piece) NumBlocks added in v0.3.8

func (p *Piece) NumBlocks() int

NumBlocks returns the number of blocks in the piece.

func (*Piece) VerifyHash

func (p *Piece) VerifyHash(buf []byte, h hash.Hash) bool

VerifyHash returns true if hash of piece data in buffer `buf` matches the hash of Piece.

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