diff options
Diffstat (limited to 'util/nvramtool/compute_ip_checksum.c')
| -rw-r--r-- | util/nvramtool/compute_ip_checksum.c | 56 |
1 files changed, 28 insertions, 28 deletions
diff --git a/util/nvramtool/compute_ip_checksum.c b/util/nvramtool/compute_ip_checksum.c index 12bed5fbf3..f19e94387a 100644 --- a/util/nvramtool/compute_ip_checksum.c +++ b/util/nvramtool/compute_ip_checksum.c @@ -13,32 +13,32 @@ unsigned long compute_ip_checksum(void *addr, unsigned long length) { - uint8_t *ptr; - volatile union { - uint8_t byte[2]; - uint16_t word; - } value; - unsigned long sum; - unsigned long i; - /* In the most straight forward way possible, - * compute an ip style checksum. - */ - sum = 0; - ptr = addr; - for(i = 0; i < length; i++) { - unsigned long value; - value = ptr[i]; - if (i & 1) { - value <<= 8; - } - /* Add the new value */ - sum += value; - /* Wrap around the carry */ - if (sum > 0xFFFF) { - sum = (sum + (sum >> 16)) & 0xFFFF; - } - } - value.byte[0] = sum & 0xff; - value.byte[1] = (sum >> 8) & 0xff; - return (~value.word) & 0xFFFF; + uint8_t *ptr; + volatile union { + uint8_t byte[2]; + uint16_t word; + } value; + unsigned long sum; + unsigned long i; + /* In the most straight forward way possible, + * compute an ip style checksum. + */ + sum = 0; + ptr = addr; + for (i = 0; i < length; i++) { + unsigned long value; + value = ptr[i]; + if (i & 1) { + value <<= 8; + } + /* Add the new value */ + sum += value; + /* Wrap around the carry */ + if (sum > 0xFFFF) { + sum = (sum + (sum >> 16)) & 0xFFFF; + } + } + value.byte[0] = sum & 0xff; + value.byte[1] = (sum >> 8) & 0xff; + return (~value.word) & 0xFFFF; } |