On 08/18/2017 11:15 AM, Mark Cave-Ayland wrote:
> This provides a standard ethernet CRC32 little-endian implementation.
>
> Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
> ---
> include/net/net.h | 2 ++
> net/net.c | 22 ++++++++++++++++++++++
> 2 files changed, 24 insertions(+)
>
> diff --git a/include/net/net.h b/include/net/net.h
> index 586098c..4afac1a 100644
> --- a/include/net/net.h
> +++ b/include/net/net.h
> @@ -228,7 +228,9 @@ NetClientState *net_hub_port_find(int hub_id);
> 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);
same here, with size_t len:
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
> unsigned compute_mcast_idx(const uint8_t *ep);
>
> #define vmstate_offset_macaddr(_state, _field) \
> diff --git a/net/net.c b/net/net.c
> index a856907..c99e705 100644
> --- a/net/net.c
> +++ b/net/net.c
> @@ -1590,6 +1590,28 @@ uint32_t net_crc32(const uint8_t *p, int len)
> 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 = crc ^ POLYNOMIAL_LE;
> + }
> + }
> + }
> +
> + return crc;
> +}
> +
> unsigned compute_mcast_idx(const uint8_t *ep)
> {
> return net_crc32(ep, 6) >> 26;
>