| #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 = get_cpu_ptr(dev->tstats); |
| u64_stats_update_begin(&tstats->syncp); |
| tstats->tx_bytes += pkt_len; |
| tstats->tx_packets++; |
| u64_stats_update_end(&tstats->syncp); |
| put_cpu_ptr(tstats); |
| } else { |
| stats->tx_errors++; |
| stats->tx_aborted_errors++; |
| } |
| } |
| #endif |