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/if_tunnel.h> 7 #include <linux/ip6_tunnel.h> 8 #include <net/ip_tunnels.h> 9 10 #define IP6TUNNEL_ERR_TIMEO (30*HZ) 11 12 /* capable of sending packets */ 13 #define IP6_TNL_F_CAP_XMIT 0x10000 14 /* capable of receiving packets */ 15 #define IP6_TNL_F_CAP_RCV 0x20000 16 /* determine capability on a per-packet basis */ 17 #define IP6_TNL_F_CAP_PER_PACKET 0x40000 18 19 struct __ip6_tnl_parm { 20 char name[IFNAMSIZ]; /* name of tunnel device */ 21 int link; /* ifindex of underlying L2 interface */ 22 __u8 proto; /* tunnel protocol */ 23 __u8 encap_limit; /* encapsulation limit for tunnel */ 24 __u8 hop_limit; /* hop limit for tunnel */ 25 __be32 flowinfo; /* traffic class and flowlabel for tunnel */ 26 __u32 flags; /* tunnel flags */ 27 struct in6_addr laddr; /* local tunnel end-point address */ 28 struct in6_addr raddr; /* remote tunnel end-point address */ 29 30 __be16 i_flags; 31 __be16 o_flags; 32 __be32 i_key; 33 __be32 o_key; 34 }; 35 36 struct ip6_tnl_dst { 37 seqlock_t lock; 38 struct dst_entry __rcu *dst; 39 u32 cookie; 40 }; 41 42 /* IPv6 tunnel */ 43 struct ip6_tnl { 44 struct ip6_tnl __rcu *next; /* next tunnel in list */ 45 struct net_device *dev; /* virtual device associated with tunnel */ 46 struct net *net; /* netns for packet i/o */ 47 struct __ip6_tnl_parm parms; /* tunnel configuration parameters */ 48 struct flowi fl; /* flowi template for xmit */ 49 struct ip6_tnl_dst __percpu *dst_cache; /* cached dst */ 50 51 int err_count; 52 unsigned long err_time; 53 54 /* These fields used only by GRE */ 55 __u32 i_seqno; /* The last seen seqno */ 56 __u32 o_seqno; /* The last output seqno */ 57 int hlen; /* Precalculated GRE header length */ 58 int mlink; 59 }; 60 61 /* Tunnel encapsulation limit destination sub-option */ 62 63 struct ipv6_tlv_tnl_enc_lim { 64 __u8 type; /* type-code for option */ 65 __u8 length; /* option length */ 66 __u8 encap_limit; /* tunnel encapsulation limit */ 67 } __packed; 68 69 struct dst_entry *ip6_tnl_dst_get(struct ip6_tnl *t); 70 int ip6_tnl_dst_init(struct ip6_tnl *t); 71 void ip6_tnl_dst_destroy(struct ip6_tnl *t); 72 void ip6_tnl_dst_reset(struct ip6_tnl *t); 73 void ip6_tnl_dst_set(struct ip6_tnl *t, struct dst_entry *dst); 74 int ip6_tnl_rcv_ctl(struct ip6_tnl *t, const struct in6_addr *laddr, 75 const struct in6_addr *raddr); 76 int ip6_tnl_xmit_ctl(struct ip6_tnl *t, const struct in6_addr *laddr, 77 const struct in6_addr *raddr); 78 __u16 ip6_tnl_parse_tlv_enc_lim(struct sk_buff *skb, __u8 *raw); 79 __u32 ip6_tnl_get_cap(struct ip6_tnl *t, const struct in6_addr *laddr, 80 const struct in6_addr *raddr); 81 struct net *ip6_tnl_get_link_net(const struct net_device *dev); 82 int ip6_tnl_get_iflink(const struct net_device *dev); 83 84 #ifdef CONFIG_INET 85 static inline void ip6tunnel_xmit(struct sock *sk, struct sk_buff *skb, 86 struct net_device *dev) 87 { 88 int pkt_len, err; 89 90 pkt_len = skb->len - skb_inner_network_offset(skb); 91 err = ip6_local_out(dev_net(skb_dst(skb)->dev), sk, skb); 92 if (unlikely(net_xmit_eval(err))) 93 pkt_len = -1; 94 iptunnel_xmit_stats(dev, pkt_len); 95 } 96 #endif 97 #endif 98