#define MAX(a, b) ((a) > (b) ? (a) : (b))
#endif
-volatile int dummy;
static timeout_t age_subnets_timeout;
/* RFC 1071 */
-static uint16_t inet_checksum(void *data, int len, uint16_t prevsum) {
- uint16_t *p = data;
+static uint16_t inet_checksum(void *vdata, int len, uint16_t prevsum) {
+ uint8_t *data = vdata;
+ uint16_t word;
uint32_t checksum = prevsum ^ 0xFFFF;
while(len >= 2) {
- checksum += *p++;
+ memcpy(&word, data, sizeof(word));
+ checksum += word;
+ data += 2;
len -= 2;
}
if(len) {
- checksum += *(uint8_t *)p;
+ checksum += *data;
}
while(checksum >> 16) {
checksum = (checksum & 0xFFFF) + (checksum >> 16);
}
- // Work around a compiler optimization bug.
- if(checksum) {
- dummy = 1;
- }
-
return ~checksum;
}