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 | |
Martin KaFai Lau | cdf3464 | 2015-09-15 14:30:07 -0700 | [diff] [blame] | 35 | struct ip6_tnl_dst { |
Martin KaFai Lau | 70da5b5 | 2015-09-15 14:30:09 -0700 | [diff] [blame] | 36 | seqlock_t lock; |
| 37 | struct dst_entry __rcu *dst; |
Martin KaFai Lau | cdf3464 | 2015-09-15 14:30:07 -0700 | [diff] [blame] | 38 | u32 cookie; |
| 39 | }; |
| 40 | |
xeb@mail.ru | c12b395 | 2012-08-10 00:51:50 +0000 | [diff] [blame] | 41 | /* IPv6 tunnel */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | struct ip6_tnl { |
Eric Dumazet | 6f0bcf1 | 2010-10-24 21:33:16 +0000 | [diff] [blame] | 43 | struct ip6_tnl __rcu *next; /* next tunnel in list */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | struct net_device *dev; /* virtual device associated with tunnel */ |
Nicolas Dichtel | 0bd87628 | 2013-08-13 17:51:12 +0200 | [diff] [blame] | 45 | struct net *net; /* netns for packet i/o */ |
xeb@mail.ru | c12b395 | 2012-08-10 00:51:50 +0000 | [diff] [blame] | 46 | struct __ip6_tnl_parm parms; /* tunnel configuration parameters */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | struct flowi fl; /* flowi template for xmit */ |
Martin KaFai Lau | cdf3464 | 2015-09-15 14:30:07 -0700 | [diff] [blame] | 48 | struct ip6_tnl_dst __percpu *dst_cache; /* cached dst */ |
xeb@mail.ru | c12b395 | 2012-08-10 00:51:50 +0000 | [diff] [blame] | 49 | |
| 50 | int err_count; |
| 51 | unsigned long err_time; |
| 52 | |
| 53 | /* These fields used only by GRE */ |
| 54 | __u32 i_seqno; /* The last seen seqno */ |
| 55 | __u32 o_seqno; /* The last output seqno */ |
| 56 | int hlen; /* Precalculated GRE header length */ |
| 57 | int mlink; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | }; |
| 59 | |
| 60 | /* Tunnel encapsulation limit destination sub-option */ |
| 61 | |
| 62 | struct ipv6_tlv_tnl_enc_lim { |
| 63 | __u8 type; /* type-code for option */ |
| 64 | __u8 length; /* option length */ |
| 65 | __u8 encap_limit; /* tunnel encapsulation limit */ |
Eric Dumazet | bc10502 | 2010-06-03 03:21:52 -0700 | [diff] [blame] | 66 | } __packed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | |
Martin KaFai Lau | f230d1e | 2015-09-15 14:30:06 -0700 | [diff] [blame] | 68 | struct dst_entry *ip6_tnl_dst_get(struct ip6_tnl *t); |
Martin KaFai Lau | cdf3464 | 2015-09-15 14:30:07 -0700 | [diff] [blame] | 69 | int ip6_tnl_dst_init(struct ip6_tnl *t); |
| 70 | void ip6_tnl_dst_destroy(struct ip6_tnl *t); |
xeb@mail.ru | c12b395 | 2012-08-10 00:51:50 +0000 | [diff] [blame] | 71 | void ip6_tnl_dst_reset(struct ip6_tnl *t); |
Martin KaFai Lau | f230d1e | 2015-09-15 14:30:06 -0700 | [diff] [blame] | 72 | void ip6_tnl_dst_set(struct ip6_tnl *t, struct dst_entry *dst); |
xeb@mail.ru | c12b395 | 2012-08-10 00:51:50 +0000 | [diff] [blame] | 73 | int ip6_tnl_rcv_ctl(struct ip6_tnl *t, const struct in6_addr *laddr, |
| 74 | const struct in6_addr *raddr); |
Steffen Klassert | d500514 | 2014-11-05 08:02:48 +0100 | [diff] [blame] | 75 | int ip6_tnl_xmit_ctl(struct ip6_tnl *t, const struct in6_addr *laddr, |
| 76 | const struct in6_addr *raddr); |
xeb@mail.ru | c12b395 | 2012-08-10 00:51:50 +0000 | [diff] [blame] | 77 | __u16 ip6_tnl_parse_tlv_enc_lim(struct sk_buff *skb, __u8 *raw); |
| 78 | __u32 ip6_tnl_get_cap(struct ip6_tnl *t, const struct in6_addr *laddr, |
| 79 | const struct in6_addr *raddr); |
Nicolas Dichtel | 1728d4f | 2015-01-15 15:11:17 +0100 | [diff] [blame] | 80 | struct net *ip6_tnl_get_link_net(const struct net_device *dev); |
Nicolas Dichtel | ecf2c06 | 2015-04-02 17:07:01 +0200 | [diff] [blame] | 81 | int ip6_tnl_get_iflink(const struct net_device *dev); |
xeb@mail.ru | c12b395 | 2012-08-10 00:51:50 +0000 | [diff] [blame] | 82 | |
David Miller | 79b16aa | 2015-04-05 22:19:09 -0400 | [diff] [blame] | 83 | static inline void ip6tunnel_xmit(struct sock *sk, struct sk_buff *skb, |
| 84 | struct net_device *dev) |
Cong Wang | e8f72ea | 2013-03-09 23:00:39 +0000 | [diff] [blame] | 85 | { |
| 86 | struct net_device_stats *stats = &dev->stats; |
| 87 | int pkt_len, err; |
| 88 | |
Nicolas Dichtel | 83cf9a2 | 2015-09-18 11:47:41 +0200 | [diff] [blame] | 89 | pkt_len = skb->len - skb_inner_network_offset(skb); |
Eric W. Biederman | 33224b1 | 2015-10-07 16:48:46 -0500 | [diff] [blame] | 90 | err = ip6_local_out(dev_net(skb_dst(skb)->dev), sk, skb); |
Cong Wang | e8f72ea | 2013-03-09 23:00:39 +0000 | [diff] [blame] | 91 | |
| 92 | if (net_xmit_eval(err) == 0) { |
Jason A. Donenfeld | b4fe85f | 2015-11-12 17:35:58 +0100 | [diff] [blame] | 93 | struct pcpu_sw_netstats *tstats = get_cpu_ptr(dev->tstats); |
Cong Wang | e8f72ea | 2013-03-09 23:00:39 +0000 | [diff] [blame] | 94 | u64_stats_update_begin(&tstats->syncp); |
| 95 | tstats->tx_bytes += pkt_len; |
| 96 | tstats->tx_packets++; |
| 97 | u64_stats_update_end(&tstats->syncp); |
Jason A. Donenfeld | b4fe85f | 2015-11-12 17:35:58 +0100 | [diff] [blame] | 98 | put_cpu_ptr(tstats); |
Cong Wang | e8f72ea | 2013-03-09 23:00:39 +0000 | [diff] [blame] | 99 | } else { |
| 100 | stats->tx_errors++; |
| 101 | stats->tx_aborted_errors++; |
| 102 | } |
| 103 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | #endif |