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- #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>
- #include <net/ip_tunnels.h>
- #include <net/dst_cache.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_cache dst_cache; /* cached dst */
- 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;
- 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;
- memset(skb->cb, 0, sizeof(struct inet6_skb_parm));
- pkt_len = skb->len - skb_inner_network_offset(skb);
- err = ip6_local_out(dev_net(skb_dst(skb)->dev), 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
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