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

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>

1 files changed, 10 insertions, 1 deletions

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index aa3f08718e44..06faa46920e1 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -782,6 +782,15 @@ struct dst_entry * ip6_route_output(struct net *net, struct sock *sk,
 
         if (!ipv6_addr_any(&fl->fl6_src))
                 flags |= RT6_LOOKUP_F_HAS_SADDR;
+        else if (sk) {
+                unsigned int prefs = inet6_sk(sk)->srcprefs;
+                if (prefs & IPV6_PREFER_SRC_TMP)
+                        flags |= RT6_LOOKUP_F_SRCPREF_TMP;
+                if (prefs & IPV6_PREFER_SRC_PUBLIC)
+                        flags |= RT6_LOOKUP_F_SRCPREF_PUBLIC;
+                if (prefs & IPV6_PREFER_SRC_COA)
+                        flags |= RT6_LOOKUP_F_SRCPREF_COA;
+        }
 
         return fib6_rule_lookup(net, fl, flags, ip6_pol_route_output);
 }
@@ -2162,7 +2171,7 @@ static int rt6_fill_node(struct sk_buff *skb, struct rt6_info *rt,
         else if (dst) {
                 struct in6_addr saddr_buf;
                 if (ipv6_dev_get_saddr(ip6_dst_idev(&rt->u.dst)->dev,
-                                       dst, &saddr_buf) == 0)
+                                       dst, 0, &saddr_buf) == 0)
                         NLA_PUT(skb, RTA_PREFSRC, 16, &saddr_buf);
         }