[IPV6]: Support Source Address Selection API (RFC5014).
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 787e90a..8995488 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -909,6 +909,7 @@
int ifindex;
int scope;
int label;
+ unsigned int prefs;
};
static inline int ipv6_saddr_preferred(int type)
@@ -984,9 +985,12 @@
break;
#ifdef CONFIG_IPV6_MIP6
case IPV6_SADDR_RULE_HOA:
+ {
/* Rule 4: Prefer home address */
- ret = !!(score->ifa->flags & IFA_F_HOMEADDRESS);
+ int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA);
+ ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome;
break;
+ }
#endif
case IPV6_SADDR_RULE_OIF:
/* Rule 5: Prefer outgoing interface */
@@ -1000,11 +1004,16 @@
break;
#ifdef CONFIG_IPV6_PRIVACY
case IPV6_SADDR_RULE_PRIVACY:
+ {
/* Rule 7: Prefer public address
* Note: prefer temprary address if use_tempaddr >= 2
*/
- ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ (score->ifa->idev->cnf.use_tempaddr >= 2);
+ int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ?
+ !!(dst->prefs & IPV6_PREFER_SRC_TMP) :
+ score->ifa->idev->cnf.use_tempaddr >= 2;
+ ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp;
break;
+ }
#endif
case IPV6_SADDR_RULE_ORCHID:
/* Rule 8-: Prefer ORCHID vs ORCHID or
@@ -1030,7 +1039,8 @@
}
int ipv6_dev_get_saddr(struct net_device *dst_dev,
- struct in6_addr *daddr, struct in6_addr *saddr)
+ struct in6_addr *daddr, unsigned int prefs,
+ struct in6_addr *saddr)
{
struct ipv6_saddr_score scores[2],
*score = &scores[0], *hiscore = &scores[1];
@@ -1044,6 +1054,7 @@
dst.ifindex = dst_dev ? dst_dev->ifindex : 0;
dst.scope = __ipv6_addr_src_scope(dst_type);
dst.label = ipv6_addr_label(daddr, dst_type, dst.ifindex);
+ dst.prefs = prefs;
hiscore->rule = -1;
hiscore->ifa = NULL;