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authorYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>2006-03-21 01:04:53 (GMT)
committerDavid S. Miller <davem@davemloft.net>2006-03-21 01:04:53 (GMT)
commitebacaaa0fdf4402cdf4c8e569f54af36b6f0aa2d (patch)
tree5d1cc0c6d94b5226507434bb86e6e2a69fdd4204 /include
parent8238dd0698b480e432acd955c45f9f907b8d27de (diff)
downloadlinux-ebacaaa0fdf4402cdf4c8e569f54af36b6f0aa2d.tar.xz
[IPV6]: ROUTE: Add support for Router Preference (RFC4191).
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/linux/icmpv6.h11
-rw-r--r--include/linux/ipv6_route.h8
-rw-r--r--include/net/ip6_route.h3
3 files changed, 19 insertions, 3 deletions
diff --git a/include/linux/icmpv6.h b/include/linux/icmpv6.h
index 0cf6c8b..c771a7d 100644
--- 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
diff --git a/include/linux/ipv6_route.h b/include/linux/ipv6_route.h
index d7c41d1..f4b085c 100644
--- a/include/linux/ipv6_route.h
+++ b/include/linux/ipv6_route.h
@@ -27,8 +27,16 @@
#define RTF_FLOW 0x02000000 /* flow significant route */
#define RTF_POLICY 0x04000000 /* policy route */
+#define RTF_PREF(pref) ((pref) << 27)
+#define RTF_PREF_MASK 0x18000000
+
#define RTF_LOCAL 0x80000000
+#ifdef __KERNEL__
+#define IPV6_EXTRACT_PREF(flag) (((flag) & RTF_PREF_MASK) >> 27)
+#define IPV6_DECODE_PREF(pref) ((pref) ^ 2) /* 1:low,2:med,3:high */
+#endif
+
struct in6_rtmsg {
struct in6_addr rtmsg_dst;
struct in6_addr rtmsg_src;
diff --git a/include/net/ip6_route.h b/include/net/ip6_route.h
index 01acca0..5016132 100644
--- a/include/net/ip6_route.h
+++ b/include/net/ip6_route.h
@@ -87,7 +87,8 @@ extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
extern struct rt6_info * rt6_get_dflt_router(struct in6_addr *addr,
struct net_device *dev);
extern struct rt6_info * rt6_add_dflt_router(struct in6_addr *gwaddr,
- struct net_device *dev);
+ struct net_device *dev,
+ unsigned int pref);
extern void rt6_purge_dflt_routers(void);