lib/csum.h

   1 /*
   2  * Copyright (c) 2008 Nicira Networks.
   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
  17 #ifndef CSUM_H
  18 #define CSUM_H 1
  19
  20 #include <stddef.h>
  21 #include <stdint.h>
  22
  23 uint16_t csum(const void *, size_t);
  24 uint32_t csum_add16(uint32_t partial, uint16_t);
  25 uint32_t csum_add32(uint32_t partial, uint32_t);
  26 uint32_t csum_continue(uint32_t partial, const void *, size_t);
  27 uint16_t csum_finish(uint32_t partial);
  28 uint16_t recalc_csum16(uint16_t old_csum, uint16_t old_u16, uint16_t new_u16);
  29 uint16_t recalc_csum32(uint16_t old_csum, uint32_t old_u32, uint32_t new_u32);
  30
  31 #endif /* csum.h */