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 * checksum.h - checksum functions 17 */ 18 #ifndef __CHECKSUM_H__ 19 #define __CHECKSUM_H__ 20 21 #include <stdint.h> 22 #include <netinet/ip.h> 23 #include <netinet/ip6.h> 24 25 uint32_t ip_checksum_add(uint32_t current, const void *data, int len); 26 uint16_t ip_checksum_finish(uint32_t temp_sum); 27 uint16_t ip_checksum(const void *data, int len); 28 29 uint32_t ipv6_pseudo_header_checksum(const struct ip6_hdr *ip6, uint16_t len, uint8_t protocol); 30 uint32_t ipv4_pseudo_header_checksum(const struct iphdr *ip, uint16_t len); 31 32 uint16_t ip_checksum_adjust(uint16_t checksum, uint32_t old_hdr_sum, uint32_t new_hdr_sum); 33 34 #endif /* __CHECKSUM_H__ */ 35