package bittorrent import ( "errors" "v2ray.com/core/common" ) type SniffHeader struct { } func (h *SniffHeader) Protocol() string { return "bittorrent" } func (h *SniffHeader) Domain() string { return "" } var errNotBittorrent = errors.New("not bittorrent header") func SniffBittorrent(b []byte) (*SniffHeader, error) { if len(b) < 20 { return nil, common.ErrNoClue } if b[0] == 19 && string(b[1:20]) == "BitTorrent protocol" { return &SniffHeader{}, nil } return nil, errNotBittorrent }