1 /*
2  * Copyright 2011 Daniel Drown
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 #pragma once
17 
18 #include <netinet/ip.h>
19 #include <netinet/ip6.h>
20 #include <stdint.h>
21 
22 uint32_t ip_checksum_add(uint32_t current, const void* data, int len);
23 uint16_t ip_checksum_finish(uint32_t temp_sum);
24 uint16_t ip_checksum(const void* data, int len);
25 
26 uint32_t ipv6_pseudo_header_checksum(const struct ip6_hdr* ip6, uint32_t len, uint8_t protocol);
27 uint32_t ipv4_pseudo_header_checksum(const struct iphdr* ip, uint16_t len);
28 
29 uint16_t ip_checksum_adjust(uint16_t checksum, uint32_t old_hdr_sum, uint32_t new_hdr_sum);
30