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inet_cksum: big-endian fix

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2011-09-08 10:59:26 +02:00
parent 9289935cfd
commit 0d0260fd1e
1 changed files with 6 additions and 2 deletions
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8
libbb/inet_cksum.c
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@ -21,8 +21,12 @@ uint16_t FAST_FUNC inet_cksum(uint16_t *addr, int nleft)
}
/* Mop up an odd byte, if necessary */
if (nleft)
sum += *(uint8_t*)addr;
if (nleft == 1) {
if (BB_LITTLE_ENDIAN)
sum += *(uint8_t*)addr;
else
sum += *(uint8_t*)addr << 8;
}
/* Add back carry outs from top 16 bits to low 16 bits */
sum = (sum >> 16) + (sum & 0xffff); /* add hi 16 to low 16 */