[IPV6]: ROUTE: Add support for Router Preference (RFC4191).

[karo-tx-linux.git] / include / linux / icmpv6.h

diff --git a/include/linux/icmpv6.h b/include/linux/icmpv6.h
index 0cf6c8b12caf37acf83f902241b0d101ff4b4f88..c771a7db9871bfa3f3c76b78c1369111c4be767b 100644 (file)
--- a/include/linux/icmpv6.h
+++ b/include/linux/icmpv6.h
@@ -40,14 +40,16 @@ struct icmp6hdr {
                 struct icmpv6_nd_ra {
                        __u8            hop_limit;
 #if defined(__LITTLE_ENDIAN_BITFIELD)
-                       __u8            reserved:6,
+                       __u8            reserved:4,
+                                       router_pref:2,
                                        other:1,
                                        managed:1;
 
 #elif defined(__BIG_ENDIAN_BITFIELD)
                        __u8            managed:1,
                                        other:1,
-                                       reserved:6;
+                                       router_pref:2,
+                                       reserved:4;
 #else
 #error "Please fix <asm/byteorder.h>"
 #endif
@@ -70,8 +72,13 @@ struct icmp6hdr {
 #define icmp6_addrconf_managed icmp6_dataun.u_nd_ra.managed
 #define icmp6_addrconf_other   icmp6_dataun.u_nd_ra.other
 #define icmp6_rt_lifetime      icmp6_dataun.u_nd_ra.rt_lifetime
+#define icmp6_router_pref      icmp6_dataun.u_nd_ra.router_pref
 };
 
+#define ICMPV6_ROUTER_PREF_LOW         0x3
+#define ICMPV6_ROUTER_PREF_MEDIUM      0x0
+#define ICMPV6_ROUTER_PREF_HIGH                0x1
+#define ICMPV6_ROUTER_PREF_INVALID     0x2
 
 #define ICMPV6_DEST_UNREACH            1
 #define ICMPV6_PKT_TOOBIG              2