1 #ifndef _NET_IP6_TUNNEL_H 2 #define _NET_IP6_TUNNEL_H 3 4 #include <linux/ipv6.h> 5 #include <linux/netdevice.h> 6 #include <linux/ip6_tunnel.h> 7 8 #define IP6TUNNEL_ERR_TIMEO (30*HZ) 9 10 /* capable of sending packets */ 11 #define IP6_TNL_F_CAP_XMIT 0x10000 12 /* capable of receiving packets */ 13 #define IP6_TNL_F_CAP_RCV 0x20000 14 /* determine capability on a per-packet basis */ 15 #define IP6_TNL_F_CAP_PER_PACKET 0x40000 16 17 struct __ip6_tnl_parm { 18 char name[IFNAMSIZ]; /* name of tunnel device */ 19 int link; /* ifindex of underlying L2 interface */ 20 __u8 proto; /* tunnel protocol */ 21 __u8 encap_limit; /* encapsulation limit for tunnel */ 22 __u8 hop_limit; /* hop limit for tunnel */ 23 __be32 flowinfo; /* traffic class and flowlabel for tunnel */ 24 __u32 flags; /* tunnel flags */ 25 struct in6_addr laddr; /* local tunnel end-point address */ 26 struct in6_addr raddr; /* remote tunnel end-point address */ 27 28 __be16 i_flags; 29 __be16 o_flags; 30 __be32 i_key; 31 __be32 o_key; 32 }; 33 34 /* IPv6 tunnel */ 35 struct ip6_tnl { 36 struct ip6_tnl __rcu *next; /* next tunnel in list */ 37 struct net_device *dev; /* virtual device associated with tunnel */ 38 struct __ip6_tnl_parm parms; /* tunnel configuration parameters */ 39 struct flowi fl; /* flowi template for xmit */ 40 struct dst_entry *dst_cache; /* cached dst */ 41 u32 dst_cookie; 42 43 int err_count; 44 unsigned long err_time; 45 46 /* These fields used only by GRE */ 47 __u32 i_seqno; /* The last seen seqno */ 48 __u32 o_seqno; /* The last output seqno */ 49 int hlen; /* Precalculated GRE header length */ 50 int mlink; 51 }; 52 53 /* Tunnel encapsulation limit destination sub-option */ 54 55 struct ipv6_tlv_tnl_enc_lim { 56 __u8 type; /* type-code for option */ 57 __u8 length; /* option length */ 58 __u8 encap_limit; /* tunnel encapsulation limit */ 59 } __packed; 60 61 struct dst_entry *ip6_tnl_dst_check(struct ip6_tnl *t); 62 void ip6_tnl_dst_reset(struct ip6_tnl *t); 63 void ip6_tnl_dst_store(struct ip6_tnl *t, struct dst_entry *dst); 64 int ip6_tnl_rcv_ctl(struct ip6_tnl *t, const struct in6_addr *laddr, 65 const struct in6_addr *raddr); 66 int ip6_tnl_xmit_ctl(struct ip6_tnl *t); 67 __u16 ip6_tnl_parse_tlv_enc_lim(struct sk_buff *skb, __u8 *raw); 68 __u32 ip6_tnl_get_cap(struct ip6_tnl *t, const struct in6_addr *laddr, 69 const struct in6_addr *raddr); 70 71 #endif 72