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