v1.0.0

common/protocol/bittorrent/bittorrent.go

@@ -0,0 +1,32 @@
+package bittorrent
+
+import (
+	"errors"
+
+	"github.com/xtls/xray-core/v1/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
+}