diff options
Diffstat (limited to 'kernel/include/net/ip6_tunnel.h')
| -rw-r--r-- | kernel/include/net/ip6_tunnel.h | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/kernel/include/net/ip6_tunnel.h b/kernel/include/net/ip6_tunnel.h new file mode 100644 index 000000000..b8529aa1d --- /dev/null +++ b/kernel/include/net/ip6_tunnel.h @@ -0,0 +1,96 @@ +#ifndef _NET_IP6_TUNNEL_H +#define _NET_IP6_TUNNEL_H + +#include <linux/ipv6.h> +#include <linux/netdevice.h> +#include <linux/if_tunnel.h> +#include <linux/ip6_tunnel.h> + +#define IP6TUNNEL_ERR_TIMEO (30*HZ) + +/* capable of sending packets */ +#define IP6_TNL_F_CAP_XMIT 0x10000 +/* capable of receiving packets */ +#define IP6_TNL_F_CAP_RCV 0x20000 +/* determine capability on a per-packet basis */ +#define IP6_TNL_F_CAP_PER_PACKET 0x40000 + +struct __ip6_tnl_parm { + char name[IFNAMSIZ]; /* name of tunnel device */ + int link; /* ifindex of underlying L2 interface */ + __u8 proto; /* tunnel protocol */ + __u8 encap_limit; /* encapsulation limit for tunnel */ + __u8 hop_limit; /* hop limit for tunnel */ + __be32 flowinfo; /* traffic class and flowlabel for tunnel */ + __u32 flags; /* tunnel flags */ + struct in6_addr laddr; /* local tunnel end-point address */ + struct in6_addr raddr; /* remote tunnel end-point address */ + + __be16 i_flags; + __be16 o_flags; + __be32 i_key; + __be32 o_key; +}; + +/* IPv6 tunnel */ +struct ip6_tnl { + struct ip6_tnl __rcu *next; /* next tunnel in list */ + struct net_device *dev; /* virtual device associated with tunnel */ + struct net *net; /* netns for packet i/o */ + struct __ip6_tnl_parm parms; /* tunnel configuration parameters */ + struct flowi fl; /* flowi template for xmit */ + struct dst_entry *dst_cache; /* cached dst */ + u32 dst_cookie; + + int err_count; + unsigned long err_time; + + /* These fields used only by GRE */ + __u32 i_seqno; /* The last seen seqno */ + __u32 o_seqno; /* The last output seqno */ + int hlen; /* Precalculated GRE header length */ + int mlink; +}; + +/* Tunnel encapsulation limit destination sub-option */ + +struct ipv6_tlv_tnl_enc_lim { + __u8 type; /* type-code for option */ + __u8 length; /* option length */ + __u8 encap_limit; /* tunnel encapsulation limit */ +} __packed; + +struct dst_entry *ip6_tnl_dst_check(struct ip6_tnl *t); +void ip6_tnl_dst_reset(struct ip6_tnl *t); +void ip6_tnl_dst_store(struct ip6_tnl *t, struct dst_entry *dst); +int ip6_tnl_rcv_ctl(struct ip6_tnl *t, const struct in6_addr *laddr, + const struct in6_addr *raddr); +int ip6_tnl_xmit_ctl(struct ip6_tnl *t, const struct in6_addr *laddr, + const struct in6_addr *raddr); +__u16 ip6_tnl_parse_tlv_enc_lim(struct sk_buff *skb, __u8 *raw); +__u32 ip6_tnl_get_cap(struct ip6_tnl *t, const struct in6_addr *laddr, + const struct in6_addr *raddr); +struct net *ip6_tnl_get_link_net(const struct net_device *dev); +int ip6_tnl_get_iflink(const struct net_device *dev); + +static inline void ip6tunnel_xmit(struct sock *sk, struct sk_buff *skb, + struct net_device *dev) +{ + struct net_device_stats *stats = &dev->stats; + int pkt_len, err; + + pkt_len = skb->len; + err = ip6_local_out_sk(sk, skb); + + if (net_xmit_eval(err) == 0) { + struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats); + u64_stats_update_begin(&tstats->syncp); + tstats->tx_bytes += pkt_len; + tstats->tx_packets++; + u64_stats_update_end(&tstats->syncp); + } else { + stats->tx_errors++; + stats->tx_aborted_errors++; + } +} +#endif |