diff options
Diffstat (limited to 'lib/csum.h')
| -rw-r--r-- | lib/csum.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/lib/csum.h b/lib/csum.h new file mode 100644 index 000000000..25de1ac40 --- /dev/null +++ b/lib/csum.h @@ -0,0 +1,31 @@ +/* + * Copyright (c) 2008 Nicira Networks. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#ifndef CSUM_H +#define CSUM_H 1 + +#include <stddef.h> +#include <stdint.h> + +uint16_t csum(const void *, size_t); +uint32_t csum_add16(uint32_t partial, uint16_t); +uint32_t csum_add32(uint32_t partial, uint32_t); +uint32_t csum_continue(uint32_t partial, const void *, size_t); +uint16_t csum_finish(uint32_t partial); +uint16_t recalc_csum16(uint16_t old_csum, uint16_t old_u16, uint16_t new_u16); +uint16_t recalc_csum32(uint16_t old_csum, uint32_t old_u32, uint32_t new_u32); + +#endif /* csum.h */ |