[IPV6] MIP6: Add Mobility header definition.

Add Mobility header definition for Mobile IPv6.
Based on MIPL2 kernel patch.

This patch was also written by: Antti Tuominen <anttit@tcs.hut.fi>

Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 34 insertions, 0 deletions

diff --git a/include/linux/in6.h b/include/linux/in6.h
index 086ec2ac8c5f..d776829b443f 100644
--- a/include/linux/in6.h
+++ b/include/linux/in6.h
@@ -134,6 +134,7 @@ struct in6_flowlabel_req
 #define IPPROTO_ICMPV6          58      /* ICMPv6                       */
 #define IPPROTO_NONE            59      /* IPv6 no next header          */
 #define IPPROTO_DSTOPTS         60      /* IPv6 destination options     */
+#define IPPROTO_MH              135     /* IPv6 mobility header         */
 
 /*
  *      IPv6 TLV options.
diff --git a/include/net/flow.h b/include/net/flow.h
index 21d988b2058a..e0522914316e 100644
--- a/include/net/flow.h
+++ b/include/net/flow.h
@@ -72,12 +72,21 @@ struct flowi {
                 } dnports;
 
                 __u32           spi;
+
+#ifdef CONFIG_IPV6_MIP6
+                struct {
+                        __u8    type;
+                } mht;
+#endif
         } uli_u;
 #define fl_ip_sport     uli_u.ports.sport
 #define fl_ip_dport     uli_u.ports.dport
 #define fl_icmp_type    uli_u.icmpt.type
 #define fl_icmp_code    uli_u.icmpt.code
 #define fl_ipsec_spi    uli_u.spi
+#ifdef CONFIG_IPV6_MIP6
+#define fl_mh_type      uli_u.mht.type
+#endif
         __u32           secid;  /* used by xfrm; see secid.txt */
 } __attribute__((__aligned__(BITS_PER_LONG/8)));
 
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index 8e6ec6063f8c..72bf47b2a4e0 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -40,6 +40,7 @@
 #define NEXTHDR_ICMP            58      /* ICMP for IPv6. */
 #define NEXTHDR_NONE            59      /* No next header */
 #define NEXTHDR_DEST            60      /* Destination options header. */
+#define NEXTHDR_MOBILITY        135     /* Mobility header. */
 
 #define NEXTHDR_MAX             255
 
diff --git a/include/net/mip6.h b/include/net/mip6.h
index 42b65bace122..fd43178faace 100644
--- a/include/net/mip6.h
+++ b/include/net/mip6.h
@@ -28,6 +28,29 @@
 #define MIP6_OPT_PAD_1  0
 #define MIP6_OPT_PAD_N  1
 
+/*
+ * Mobility Header
+ */
+struct ip6_mh {
+        __u8    ip6mh_proto;
+        __u8    ip6mh_hdrlen;
+        __u8    ip6mh_type;
+        __u8    ip6mh_reserved;
+        __u16   ip6mh_cksum;
+        /* Followed by type specific messages */
+        __u8    data[0];
+} __attribute__ ((__packed__));
+
+#define IP6_MH_TYPE_BRR         0   /* Binding Refresh Request */
+#define IP6_MH_TYPE_HOTI        1   /* HOTI Message   */
+#define IP6_MH_TYPE_COTI        2   /* COTI Message  */
+#define IP6_MH_TYPE_HOT         3   /* HOT Message   */
+#define IP6_MH_TYPE_COT         4   /* COT Message  */
+#define IP6_MH_TYPE_BU          5   /* Binding Update */
+#define IP6_MH_TYPE_BACK        6   /* Binding ACK */
+#define IP6_MH_TYPE_BERROR      7   /* Binding Error */
+#define IP6_MH_TYPE_MAX         IP6_MH_TYPE_BERROR
+
 extern int mip6_init(void);
 extern void mip6_fini(void);