gre: Support GRE over IPv6
GRE over IPv6 implementation.
Signed-off-by: Dmitry Kozlov <xeb@mail.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/ip6_tunnel.h b/include/net/ip6_tunnel.h
index 358fb86..e03047f 100644
--- a/include/net/ip6_tunnel.h
+++ b/include/net/ip6_tunnel.h
@@ -5,6 +5,8 @@
#include <linux/netdevice.h>
#include <linux/ip6_tunnel.h>
+#define IP6TUNNEL_ERR_TIMEO (30*HZ)
+
/* capable of sending packets */
#define IP6_TNL_F_CAP_XMIT 0x10000
/* capable of receiving packets */
@@ -12,15 +14,40 @@
/* determine capability on a per-packet basis */
#define IP6_TNL_F_CAP_PER_PACKET 0x40000
-/* IPv6 tunnel */
+struct __ip6_tnl_parm {
+ char name[IFNAMSIZ]; /* name of tunnel device */
+ int link; /* ifindex of underlying L2 interface */
+ __u8 proto; /* tunnel protocol */
+ __u8 encap_limit; /* encapsulation limit for tunnel */
+ __u8 hop_limit; /* hop limit for tunnel */
+ __be32 flowinfo; /* traffic class and flowlabel for tunnel */
+ __u32 flags; /* tunnel flags */
+ struct in6_addr laddr; /* local tunnel end-point address */
+ struct in6_addr raddr; /* remote tunnel end-point address */
+ __be16 i_flags;
+ __be16 o_flags;
+ __be32 i_key;
+ __be32 o_key;
+};
+
+/* IPv6 tunnel */
struct ip6_tnl {
struct ip6_tnl __rcu *next; /* next tunnel in list */
struct net_device *dev; /* virtual device associated with tunnel */
- struct ip6_tnl_parm parms; /* tunnel configuration parameters */
+ struct __ip6_tnl_parm parms; /* tunnel configuration parameters */
struct flowi fl; /* flowi template for xmit */
struct dst_entry *dst_cache; /* cached dst */
u32 dst_cookie;
+
+ int err_count;
+ unsigned long err_time;
+
+ /* These fields used only by GRE */
+ __u32 i_seqno; /* The last seen seqno */
+ __u32 o_seqno; /* The last output seqno */
+ int hlen; /* Precalculated GRE header length */
+ int mlink;
};
/* Tunnel encapsulation limit destination sub-option */
@@ -31,4 +58,14 @@
__u8 encap_limit; /* tunnel encapsulation limit */
} __packed;
+struct dst_entry *ip6_tnl_dst_check(struct ip6_tnl *t);
+void ip6_tnl_dst_reset(struct ip6_tnl *t);
+void ip6_tnl_dst_store(struct ip6_tnl *t, struct dst_entry *dst);
+int ip6_tnl_rcv_ctl(struct ip6_tnl *t, const struct in6_addr *laddr,
+ const struct in6_addr *raddr);
+int ip6_tnl_xmit_ctl(struct ip6_tnl *t);
+__u16 ip6_tnl_parse_tlv_enc_lim(struct sk_buff *skb, __u8 *raw);
+__u32 ip6_tnl_get_cap(struct ip6_tnl *t, const struct in6_addr *laddr,
+ const struct in6_addr *raddr);
+
#endif