[IPV6]: Support Source Address Selection API (RFC5014).

[pandora-kernel.git] / net / ipv6 / addrconf.c

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 787e90a..8995488 100644 (file)
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -909,6 +909,7 @@ struct ipv6_saddr_dst {
        int ifindex;
        int scope;
        int label;
+       unsigned int prefs;
 };
 
 static inline int ipv6_saddr_preferred(int type)
@@ -984,9 +985,12 @@ static int ipv6_get_saddr_eval(struct ipv6_saddr_score *score,
                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 @@ static int ipv6_get_saddr_eval(struct ipv6_saddr_score *score,
                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 @@ out:
 }
 
 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 @@ int ipv6_dev_get_saddr(struct net_device *dst_dev,
        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;