torrent

type BitField []byte

type Config struct {
	FetchPeersTimeout     time.Duration
	UpdateTrackersRate    time.Duration
	ReadMessageTimeout    time.Duration
	PeerConnectionTimeout time.Duration
	RetryPeersRate        time.Duration
}

type Downloader struct {
	Config  Config
	Torrent *Torrent
	Logger  *log.Logger

	ClientID [20]byte
	Port     int

	MetaDataSize       int
	MetaDataPieceSize  int
	MetaDataPieceCount int

	MetaDataSizeCh     chan int
	MetaDataSizeDoneCh chan struct{}

	MetaDataPieceCh      chan MetaDataPiece
	MetaDataPiecesDoneCh chan struct{}
	GotMetaData          atomic.Bool

	Files  []*os.File
	Ranges map[int][]fileRange

	PieceRequestsCh chan pieceRequest
	PieceResponseCh chan pieceResponce

	InFlightPeers map[string]bool
	FetchPeerCh   chan string
	RetryPeerCh   chan string

	Closed   chan struct{}
	Done     chan struct{}
	Progress chan float64
}

type ExtendedMessage struct {
	ID        MessageID
	Extension byte
	Payload   []byte
}

type FileInfo struct {
	Length int
	Path   string
}

type Handshake struct {
	Str      string
	InfoHash [20]byte
	ID       [20]byte
}

type HaveMessage struct {
	PieceIndex int
}

type Message struct {
	ID      MessageID
	Payload []byte
}

type MessageID uint8

type MetaData struct {
	Length      int
	Files       []FileInfo
	PieceLength int
	Pieces      [][20]byte
}

type MetaDataPiece struct {
	Index int
	Data  []byte
}

type Peer struct {
	Addr string
	ID   [20]byte

	Choked bool
	// contains filtered or unexported fields
}

type PieceMessage struct {
	PieceIndex  int
	BlockOffset int
	BlockData   []byte
}

type Torrent struct {
	MetaData
	AnnounceUrls []string
	Name         string
	InfoHash     [20]byte
}

type TorrentFileInfo struct {
	Length int      `bencode:"length"`
	Path   []string `bencode:"path"`
}

type TorrentInfo struct {
	Length      int               `bencode:"length,omitempty"`
	Name        string            `bencode:"name"`
	Files       []TorrentFileInfo `bencode:"files,omitempty"`
	PieceLength int               `bencode:"piece length"`
	Pieces      string            `bencode:"pieces"`
}

type TorrentMetaInfo struct {
	Announce     string      `bencode:"announce"`
	AnnounceList [][]string  `bencode:"announce-list"`
	Info         TorrentInfo `bencode:"info"`
}