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gerrit.nordix.org / codeaurora / cp-linux / 8d8f6542b666daf5e87de156590e635c2c4da0c0 / . / include / net / ip6_tunnel.h
blob: 9c2c044153f62a4df5e7c31ceb090d7695ecd244 [file] [log] [blame]
Kyle Swenson8d8f6542021-03-15 11:02:55 -0600[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>
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
18struct __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
35struct ip6_tnl_dst {
36 seqlock_t lock;
37 struct dst_entry __rcu *dst;
38 u32 cookie;
39};
40
41/* IPv6 tunnel */
42struct ip6_tnl {
43 struct ip6_tnl __rcu *next; /* next tunnel in list */
44 struct net_device *dev; /* virtual device associated with tunnel */
45 struct net *net; /* netns for packet i/o */
46 struct __ip6_tnl_parm parms; /* tunnel configuration parameters */
47 struct flowi fl; /* flowi template for xmit */
48 struct ip6_tnl_dst __percpu *dst_cache; /* cached dst */
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;
58};
59
60/* Tunnel encapsulation limit destination sub-option */
61
62struct ipv6_tlv_tnl_enc_lim {
63 __u8 type; /* type-code for option */
64 __u8 length; /* option length */
65 __u8 encap_limit; /* tunnel encapsulation limit */
66} __packed;
67
68struct dst_entry *ip6_tnl_dst_get(struct ip6_tnl *t);
69int ip6_tnl_dst_init(struct ip6_tnl *t);
70void ip6_tnl_dst_destroy(struct ip6_tnl *t);
71void ip6_tnl_dst_reset(struct ip6_tnl *t);
72void ip6_tnl_dst_set(struct ip6_tnl *t, struct dst_entry *dst);
73int ip6_tnl_rcv_ctl(struct ip6_tnl *t, const struct in6_addr *laddr,
74 const struct in6_addr *raddr);
75int ip6_tnl_xmit_ctl(struct ip6_tnl *t, const struct in6_addr *laddr,
76 const struct in6_addr *raddr);
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);
80struct net *ip6_tnl_get_link_net(const struct net_device *dev);
81int ip6_tnl_get_iflink(const struct net_device *dev);
82
83static inline void ip6tunnel_xmit(struct sock *sk, struct sk_buff *skb,
84 struct net_device *dev)
85{
86 struct net_device_stats *stats = &dev->stats;
87 int pkt_len, err;
88
89 memset(skb->cb, 0, sizeof(struct inet6_skb_parm));
90 pkt_len = skb->len - skb_inner_network_offset(skb);
91 err = ip6_local_out(dev_net(skb_dst(skb)->dev), sk, skb);
92
93 if (net_xmit_eval(err) == 0) {
94 struct pcpu_sw_netstats *tstats = get_cpu_ptr(dev->tstats);
95 u64_stats_update_begin(&tstats->syncp);
96 tstats->tx_bytes += pkt_len;
97 tstats->tx_packets++;
98 u64_stats_update_end(&tstats->syncp);
99 put_cpu_ptr(tstats);
100 } else {
101 stats->tx_errors++;
102 stats->tx_aborted_errors++;
103 }
104}
105#endif