diff options
Diffstat (limited to 'lib/checksum.c')
| -rw-r--r-- | lib/checksum.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/lib/checksum.c b/lib/checksum.c index 18e3850474..3473370041 100644 --- a/lib/checksum.c +++ b/lib/checksum.c @@ -46,6 +46,24 @@ int /* return checksum in low-order 16 bits */ return (answer); } +int in_cksum_with_ph4(struct ipv4_ph *ph, void *data, int nbytes) +{ + uint8_t dat[sizeof(struct ipv4_ph) + nbytes]; + + memcpy(dat, ph, sizeof(struct ipv4_ph)); + memcpy(dat + sizeof(struct ipv4_ph), data, nbytes); + return in_cksum(dat, sizeof(dat)); +} + +int in_cksum_with_ph6(struct ipv6_ph *ph, void *data, int nbytes) +{ + uint8_t dat[sizeof(struct ipv6_ph) + nbytes]; + + memcpy(dat, ph, sizeof(struct ipv6_ph)); + memcpy(dat + sizeof(struct ipv6_ph), data, nbytes); + return in_cksum(dat, sizeof(dat)); +} + /* Fletcher Checksum -- Refer to RFC1008. */ #define MODX 4102U /* 5802 should be fine */ |