This provides a standard ethernet CRC32 little-endian implementation.
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Jason Wang <jasowang@redhat.com>
void qdev_set_nic_properties(DeviceState *dev, NICInfo *nd);
#define POLYNOMIAL_BE 0x04c11db6
+#define POLYNOMIAL_LE 0xedb88320
uint32_t net_crc32(const uint8_t *p, int len);
+uint32_t net_crc32_le(const uint8_t *p, int len);
unsigned compute_mcast_idx(const uint8_t *ep);
#define vmstate_offset_macaddr(_state, _field) \
return crc;
}
+uint32_t net_crc32_le(const uint8_t *p, int len)
+{
+ uint32_t crc;
+ int carry, i, j;
+ uint8_t b;
+
+ crc = 0xffffffff;
+ for (i = 0; i < len; i++) {
+ b = *p++;
+ for (j = 0; j < 8; j++) {
+ carry = (crc & 0x1) ^ (b & 0x01);
+ crc >>= 1;
+ b >>= 1;
+ if (carry) {
+ crc ^= POLYNOMIAL_LE;
+ }
+ }
+ }
+
+ return crc;
+}
+
unsigned compute_mcast_idx(const uint8_t *ep)
{
return net_crc32(ep, ETH_ALEN) >> 26;