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[IPV6]: Use ipv6_addr_src_scope for link address sorting. 

In the source address selection, the address must be sorted
from global to node-local.

But, ifp->scope is different from the scope for source address
selection.

                                 2001::1  fe80::1     ::1
ifp->scope                             0     0x02    0x01
ipv6_addr_src_scope(&ifp->addr)     0x0e     0x02    0x01

So, we need to use ipv6_addr_src_scope(&ifp->addr) for sorting.

And, for backward compatibility, addresses should be sorted from
new one to old one.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Acked-by: Brian Haley <brian.haley@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
YOSHIFUJI Hideaki 2006-07-11 13:05:30 -07:00 committed by David S. Miller
parent 6150c22e2a
commit 8a6ce0c083
1 changed files with 2 additions and 1 deletions
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3
net/ipv6/addrconf.c
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@ -512,6 +512,7 @@ static void
ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
{
struct inet6_ifaddr *ifa, **ifap;
int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
/*
* Each device address list is sorted in order of scope -
@ -519,7 +520,7 @@ ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
*/
for (ifap = &idev->addr_list; (ifa = *ifap) != NULL;
ifap = &ifa->if_next) {
if (ifp->scope > ifa->scope)
if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
break;
}