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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 09:53:30 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 09:53:30 +0000 |
commit | 2c7cac91ed6e7db0f6937923d2b57f97dbdbc337 (patch) | |
tree | c05dc0f8e6aa3accc84e3e5cffc933ed94941383 /lib/checksum.h | |
parent | Initial commit. (diff) | |
download | frr-upstream.tar.xz frr-upstream.zip |
Adding upstream version 8.4.4.upstream/8.4.4upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'lib/checksum.h')
-rw-r--r-- | lib/checksum.h | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/lib/checksum.h b/lib/checksum.h new file mode 100644 index 0000000..508c3f3 --- /dev/null +++ b/lib/checksum.h @@ -0,0 +1,74 @@ +#ifndef _FRR_CHECKSUM_H +#define _FRR_CHECKSUM_H + +#include <stdint.h> +#include <netinet/in.h> + +#ifdef __cplusplus +extern "C" { +#endif + + +/* IPv4 pseudoheader */ +struct ipv4_ph { + struct in_addr src; + struct in_addr dst; + uint8_t rsvd; + uint8_t proto; + uint16_t len; +} __attribute__((packed)); + +/* IPv6 pseudoheader */ +struct ipv6_ph { + struct in6_addr src; + struct in6_addr dst; + uint32_t ulpl; + uint8_t zero[3]; + uint8_t next_hdr; +} __attribute__((packed)); + + +extern uint16_t in_cksumv(const struct iovec *iov, size_t iov_len); + +static inline uint16_t in_cksum(const void *data, size_t nbytes) +{ + struct iovec iov[1]; + + iov[0].iov_base = (void *)data; + iov[0].iov_len = nbytes; + return in_cksumv(iov, array_size(iov)); +} + +static inline uint16_t in_cksum_with_ph4(const struct ipv4_ph *ph, + const void *data, size_t nbytes) +{ + struct iovec iov[2]; + + iov[0].iov_base = (void *)ph; + iov[0].iov_len = sizeof(*ph); + iov[1].iov_base = (void *)data; + iov[1].iov_len = nbytes; + return in_cksumv(iov, array_size(iov)); +} + +static inline uint16_t in_cksum_with_ph6(const struct ipv6_ph *ph, + const void *data, size_t nbytes) +{ + struct iovec iov[2]; + + iov[0].iov_base = (void *)ph; + iov[0].iov_len = sizeof(*ph); + iov[1].iov_base = (void *)data; + iov[1].iov_len = nbytes; + return in_cksumv(iov, array_size(iov)); +} + +#define FLETCHER_CHECKSUM_VALIDATE 0xffff +extern uint16_t fletcher_checksum(uint8_t *, const size_t len, + const uint16_t offset); + +#ifdef __cplusplus +} +#endif + +#endif /* _FRR_CHECKSUM_H */ |