Imports github.com/quic-go/quic-go/quicvarint github.com/xtls/xray-core/common github.com/xtls/xray-core/common/buf github.com/xtls/xray-core/common/bytespool github.com/xtls/xray-core/common/errors github.com/xtls/xray-core/common/protocol/tls golang.org/x/crypto/hkdf Standard library imports crypto crypto/aes crypto/cipher crypto/tls encoding/binary io unsafe