Commit 91b4b04f authored by YOSHIFUJI Hideaki / 吉藤英明's avatar YOSHIFUJI Hideaki / 吉藤英明 Committed by David S. Miller
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ipv6: Compare addresses only bits up to the prefix length (RFC6724). 



Compare bits up to the source address's prefix length only to
allows DNS load balancing to continue to be used as a tie breaker.

Signed-off-by: default avatarYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 417962a0

net/ipv6/addrconf.c

+4 −2
Original line number Diff line number Diff line
@@ -1070,8 +1070,10 @@ static int ipv6_get_saddr_eval(struct net *net, 
		break;

	case IPV6_SADDR_RULE_PREFIX:

		/* Rule 8: Use longest matching prefix */

		score->matchlen = ret = ipv6_addr_diff(&score->ifa->addr,

						       dst->addr);

		ret = ipv6_addr_diff(&score->ifa->addr, dst->addr);

		if (ret > score->ifa->prefix_len)

			ret = score->ifa->prefix_len;

		score->matchlen = ret;

		break;

	default:

		ret = 0;