1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
3 * This file is open source software, licensed to you under the terms
4 * of the Apache License, Version 2.0 (the "License"). See the NOTICE file
5 * distributed with this work for additional information regarding copyright
6 * ownership. You may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
20 * Copyright (C) 2014 Cloudius Systems, Ltd.
23 * Ceph - scalable distributed file system
25 * Copyright (C) 2015 XSky <haomai@xsky.com>
27 * Author: Haomai Wang <haomaiwang@gmail.com>
29 * This is free software; you can redistribute it and/or
30 * modify it under the terms of the GNU Lesser General Public
31 * License version 2.1, as published by the Free Software
32 * Foundation. See file COPYING.
36 #ifndef CEPH_MSG_CHECKSUM_H_
37 #define CEPH_MSG_CHECKSUM_H_
41 #include <arpa/inet.h>
45 uint16_t ip_checksum(const void* data, size_t len);
50 void sum(const char* data, size_t len);
51 void sum(const Packet& p);
52 void sum(uint8_t data) {
60 void sum(uint16_t data) {
62 sum(uint8_t(data >> 8));
68 void sum(uint32_t data) {
71 sum(uint16_t(data >> 16));
77 template <typename T0, typename... T>
78 void sum_many(T0 data, T... rest) {
85 #endif /* CEPH_MSG_CHECKSUM_H_ */