Suresh wrote:
> Hi,
>
> I have doubt on the Multicast Loopback handling on DAD.
> Does Linux-IPv6 confirm "9. APPENDIX A: LOOPBACK SUPPRESSION &
> DUPLICATE ADDRESS DETECTION" of RFC2462 ? According to the following
> code, DAD will not work where two interfaces are using the same
> link-layer address, since it simply discards the packet from other node
> also. Am I right?
>
>
> if (dev->type == ARPHRD_IEEE802_TR) {
> unsigned char *sadr = skb->mac.raw;
> if (((sadr[8] ^ dev->dev_addr[0]) &
> 0x7f) == 0 &&
> sadr[9] == dev->dev_addr[1] &&
> sadr[10] == dev->dev_addr[2] &&
> sadr[11] == dev->dev_addr[3] &&
> sadr[12] == dev->dev_addr[4] &&
> sadr[13] == dev->dev_addr[5]) {
> /* looped-back to us */
> goto out;
> }
This will only be evaluated on Token Ring devices.
-vlad
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