Revision 5acf5ea4 net/checksum.c
| b/net/checksum.c | ||
|---|---|---|
| 20 | 20 |
#define PROTO_TCP 6 |
| 21 | 21 |
#define PROTO_UDP 17 |
| 22 | 22 |
|
| 23 |
uint32_t net_checksum_add(int len, uint8_t *buf)
|
|
| 23 |
uint32_t net_checksum_add_cont(int len, uint8_t *buf, int seq)
|
|
| 24 | 24 |
{
|
| 25 | 25 |
uint32_t sum = 0; |
| 26 | 26 |
int i; |
| 27 | 27 |
|
| 28 |
for (i = 0; i < len; i++) {
|
|
| 29 |
if (i & 1) |
|
| 30 |
sum += (uint32_t)buf[i]; |
|
| 31 |
else |
|
| 32 |
sum += (uint32_t)buf[i] << 8; |
|
| 28 |
for (i = seq; i < seq + len; i++) {
|
|
| 29 |
if (i & 1) {
|
|
| 30 |
sum += (uint32_t)buf[i - seq]; |
|
| 31 |
} else {
|
|
| 32 |
sum += (uint32_t)buf[i - seq] << 8; |
|
| 33 |
} |
|
| 33 | 34 |
} |
| 34 | 35 |
return sum; |
| 35 | 36 |
} |
Also available in: Unified diff