| // Copyright 2019 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef SRC_CONNECTIVITY_PPP_LIB_HDLC_FCS_H_ |
| #define SRC_CONNECTIVITY_PPP_LIB_HDLC_FCS_H_ |
| |
| #include <lib/stdcompat/span.h> |
| |
| #include <cstddef> |
| #include <cstdint> |
| |
| namespace ppp { |
| |
| static constexpr uint16_t kFrameCheckSequenceInit = 0xffff; |
| static constexpr uint16_t kFrameCheckSequence = 0xf0b8; |
| |
| uint16_t Fcs(uint16_t current, cpp20::span<const uint8_t> data); |
| |
| } // namespace ppp |
| |
| #endif // SRC_CONNECTIVITY_PPP_LIB_HDLC_FCS_H_ |
