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 9 #define IP6TUNNEL_ERR_TIMEO (30*HZ) 10 11 /* capable of sending packets */ 12 #define IP6_TNL_F_CAP_XMIT 0x10000 13 /* capable of receiving packets */ 14 #define IP6_TNL_F_CAP_RCV 0x20000 15 /* determine capability on a per-packet basis */ 16 #define IP6_TNL_F_CAP_PER_PACKET 0x40000 17 18 struct __ip6_tnl_parm { 19 char name[IFNAMSIZ]; /* name of tunnel device */ 20 int link; /* ifindex of underlying L2 interface */ 21 __u8 proto; /* tunnel protocol */ 22 __u8 encap_limit; /* encapsulation limit for tunnel */ 23 __u8 hop_limit; /* hop limit for tunnel */ 24 __be32 flowinfo; /* traffic class and flowlabel for tunnel */ 25 __u32 flags; /* tunnel flags */ 26 struct in6_addr laddr; /* local tunnel end-point address */ 27 struct in6_addr raddr; /* remote tunnel end-point address */ 28 29 __be16 i_flags; 30 __be16 o_flags; 31 __be32 i_key; 32 __be32 o_key; 33 }; 34 35 /* IPv6 tunnel */ 36 struct ip6_tnl { 37 struct ip6_tnl __rcu *next; /* next tunnel in list */ 38 struct net_device *dev; /* virtual device associated with tunnel */ 39 struct net *net; /* netns for packet i/o */ 40 struct __ip6_tnl_parm parms; /* tunnel configuration parameters */ 41 struct flowi fl; /* flowi template for xmit */ 42 struct dst_entry *dst_cache; /* cached dst */ 43 u32 dst_cookie; 44 45 int err_count; 46 unsigned long err_time; 47 48 /* These fields used only by GRE */ 49 __u32 i_seqno; /* The last seen seqno */ 50 __u32 o_seqno; /* The last output seqno */ 51 int hlen; /* Precalculated GRE header length */ 52 int mlink; 53 }; 54 55 /* Tunnel encapsulation limit destination sub-option */ 56 57 struct ipv6_tlv_tnl_enc_lim { 58 __u8 type; /* type-code for option */ 59 __u8 length; /* option length */ 60 __u8 encap_limit; /* tunnel encapsulation limit */ 61 } __packed; 62 63 struct dst_entry *ip6_tnl_dst_check(struct ip6_tnl *t); 64 void ip6_tnl_dst_reset(struct ip6_tnl *t); 65 void ip6_tnl_dst_store(struct ip6_tnl *t, struct dst_entry *dst); 66 int ip6_tnl_rcv_ctl(struct ip6_tnl *t, const struct in6_addr *laddr, 67 const struct in6_addr *raddr); 68 int ip6_tnl_xmit_ctl(struct ip6_tnl *t); 69 __u16 ip6_tnl_parse_tlv_enc_lim(struct sk_buff *skb, __u8 *raw); 70 __u32 ip6_tnl_get_cap(struct ip6_tnl *t, const struct in6_addr *laddr, 71 const struct in6_addr *raddr); 72 73 static inline void ip6tunnel_xmit(struct sk_buff *skb, struct net_device *dev) 74 { 75 struct net_device_stats *stats = &dev->stats; 76 int pkt_len, err; 77 78 pkt_len = skb->len; 79 err = ip6_local_out(skb); 80 81 if (net_xmit_eval(err) == 0) { 82 struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats); 83 u64_stats_update_begin(&tstats->syncp); 84 tstats->tx_bytes += pkt_len; 85 tstats->tx_packets++; 86 u64_stats_update_end(&tstats->syncp); 87 } else { 88 stats->tx_errors++; 89 stats->tx_aborted_errors++; 90 } 91 } 92 #endif 93