Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _NET_IP6_TUNNEL_H |
| 2 | #define _NET_IP6_TUNNEL_H |
| 3 | |
| 4 | #include <linux/ipv6.h> |
| 5 | #include <linux/netdevice.h> |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 6 | #include <linux/if_tunnel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | #include <linux/ip6_tunnel.h> |
| 8 | |
xeb@mail.ru | c12b395 | 2012-08-10 00:51:50 +0000 | [diff] [blame] | 9 | #define IP6TUNNEL_ERR_TIMEO (30*HZ) |
| 10 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
Ville Nuorvala | d0087b2 | 2012-06-28 18:15:52 +0000 | [diff] [blame] | 15 | /* determine capability on a per-packet basis */ |
| 16 | #define IP6_TNL_F_CAP_PER_PACKET 0x40000 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | |
xeb@mail.ru | c12b395 | 2012-08-10 00:51:50 +0000 | [diff] [blame] | 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 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | |
xeb@mail.ru | c12b395 | 2012-08-10 00:51:50 +0000 | [diff] [blame] | 29 | __be16 i_flags; |
| 30 | __be16 o_flags; |
| 31 | __be32 i_key; |
| 32 | __be32 o_key; |
| 33 | }; |
| 34 | |
| 35 | /* IPv6 tunnel */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | struct ip6_tnl { |
Eric Dumazet | 6f0bcf1 | 2010-10-24 21:33:16 +0000 | [diff] [blame] | 37 | struct ip6_tnl __rcu *next; /* next tunnel in list */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | struct net_device *dev; /* virtual device associated with tunnel */ |
Nicolas Dichtel | 0bd87628 | 2013-08-13 17:51:12 +0200 | [diff] [blame] | 39 | struct net *net; /* netns for packet i/o */ |
xeb@mail.ru | c12b395 | 2012-08-10 00:51:50 +0000 | [diff] [blame] | 40 | struct __ip6_tnl_parm parms; /* tunnel configuration parameters */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | struct flowi fl; /* flowi template for xmit */ |
| 42 | struct dst_entry *dst_cache; /* cached dst */ |
| 43 | u32 dst_cookie; |
xeb@mail.ru | c12b395 | 2012-08-10 00:51:50 +0000 | [diff] [blame] | 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; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 */ |
Eric Dumazet | bc10502 | 2010-06-03 03:21:52 -0700 | [diff] [blame] | 61 | } __packed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | |
xeb@mail.ru | c12b395 | 2012-08-10 00:51:50 +0000 | [diff] [blame] | 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 | |
Cong Wang | e8f72ea | 2013-03-09 23:00:39 +0000 | [diff] [blame] | 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 | |
Cong Wang | e8f72ea | 2013-03-09 23:00:39 +0000 | [diff] [blame] | 78 | pkt_len = skb->len; |
| 79 | err = ip6_local_out(skb); |
| 80 | |
| 81 | if (net_xmit_eval(err) == 0) { |
| 82 | struct pcpu_tstats *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 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | #endif |