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

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

4 files changed, 23 insertions, 4 deletions

diff --git a/include/linux/in6.h b/include/linux/in6.h
index 2a61c82af115..f674000c6c99 100644
--- a/include/linux/in6.h
+++ b/include/linux/in6.h
@@ -249,4 +249,15 @@ struct in6_flowlabel_req
  * IP6T_SO_GET_REVISION_TARGET  69
  */
 
+/* RFC5014: Source address selection */
+#define IPV6_ADDR_PREFERENCES   72
+
+#define IPV6_PREFER_SRC_TMP             0x0001
+#define IPV6_PREFER_SRC_PUBLIC          0x0002
+#define IPV6_PREFER_SRC_PUBTMP_DEFAULT  0x0100
+#define IPV6_PREFER_SRC_COA             0x0004
+#define IPV6_PREFER_SRC_HOME            0x0400
+#define IPV6_PREFER_SRC_CGA             0x0008
+#define IPV6_PREFER_SRC_NONCGA          0x0800
+
 #endif
diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h
index 87ae4e389ce1..c9ba0da16ce9 100644
--- a/include/linux/ipv6.h
+++ b/include/linux/ipv6.h
@@ -322,7 +322,11 @@ struct ipv6_pinfo {
         __u8                    recverr:1,
                                 sndflow:1,
                                 pmtudisc:2,
-                                ipv6only:1;
+                                ipv6only:1,
+                                srcprefs:3;     /* 001: prefer temporary address
+                                                 * 010: prefer public address
+                                                 * 100: prefer care-of address
+                                                 */
         __u8                    tclass;
 
         __u32                   dst_cookie;
diff --git a/include/net/addrconf.h b/include/net/addrconf.h
index edcb4bbaab7d..c9276c72764d 100644
--- a/include/net/addrconf.h
+++ b/include/net/addrconf.h
@@ -78,6 +78,7 @@ extern struct inet6_ifaddr      *ipv6_get_ifaddr(struct net *net,
 
 extern int                      ipv6_dev_get_saddr(struct net_device *dev, 
                                                struct in6_addr *daddr,
+                                               unsigned int srcprefs,
                                                struct in6_addr *saddr);
 extern int                      ipv6_get_lladdr(struct net_device *dev,
                                                 struct in6_addr *addr,
diff --git a/include/net/ip6_route.h b/include/net/ip6_route.h
index 5c3b67c86aef..3ae6799c2b14 100644
--- a/include/net/ip6_route.h
+++ b/include/net/ip6_route.h
@@ -30,9 +30,12 @@ struct route_info {
 #include <linux/ip.h>
 #include <linux/ipv6.h>
 
-#define RT6_LOOKUP_F_IFACE      0x1
-#define RT6_LOOKUP_F_REACHABLE  0x2
-#define RT6_LOOKUP_F_HAS_SADDR  0x4
+#define RT6_LOOKUP_F_IFACE              0x00000001
+#define RT6_LOOKUP_F_REACHABLE          0x00000002
+#define RT6_LOOKUP_F_HAS_SADDR          0x00000004
+#define RT6_LOOKUP_F_SRCPREF_TMP        0x00000008
+#define RT6_LOOKUP_F_SRCPREF_PUBLIC     0x00000010
+#define RT6_LOOKUP_F_SRCPREF_COA        0x00000020
 
 extern struct rt6_info  *ip6_null_entry;