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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)
- #define IP6_TNL_F_CAP_XMIT 0x10000
- #define IP6_TNL_F_CAP_RCV 0x20000
- #define IP6_TNL_F_CAP_PER_PACKET 0x40000
- struct __ip6_tnl_parm {
- char name[IFNAMSIZ];
- int link;
- __u8 proto;
- __u8 encap_limit;
- __u8 hop_limit;
- bool collect_md;
- __be32 flowinfo;
- __u32 flags;
- struct in6_addr laddr;
- struct in6_addr raddr;
- __be16 i_flags;
- __be16 o_flags;
- __be32 i_key;
- __be32 o_key;
- __u32 fwmark;
- __u32 index;
- __u8 erspan_ver;
- __u8 dir;
- __u16 hwid;
- };
- struct ip6_tnl {
- struct ip6_tnl __rcu *next;
- struct net_device *dev;
- struct net *net;
- struct __ip6_tnl_parm parms;
- struct flowi fl;
- struct dst_cache dst_cache;
- struct gro_cells gro_cells;
- int err_count;
- unsigned long err_time;
-
- __u32 i_seqno;
- __u32 o_seqno;
- int hlen;
- int tun_hlen;
- int encap_hlen;
- struct ip_tunnel_encap encap;
- int mlink;
- };
- struct ip6_tnl_encap_ops {
- size_t (*encap_hlen)(struct ip_tunnel_encap *e);
- int (*build_header)(struct sk_buff *skb, struct ip_tunnel_encap *e,
- u8 *protocol, struct flowi6 *fl6);
- };
- #ifdef CONFIG_INET
- extern const struct ip6_tnl_encap_ops __rcu *
- ip6tun_encaps[MAX_IPTUN_ENCAP_OPS];
- int ip6_tnl_encap_add_ops(const struct ip6_tnl_encap_ops *ops,
- unsigned int num);
- int ip6_tnl_encap_del_ops(const struct ip6_tnl_encap_ops *ops,
- unsigned int num);
- int ip6_tnl_encap_setup(struct ip6_tnl *t,
- struct ip_tunnel_encap *ipencap);
- static inline int ip6_encap_hlen(struct ip_tunnel_encap *e)
- {
- const struct ip6_tnl_encap_ops *ops;
- int hlen = -EINVAL;
- if (e->type == TUNNEL_ENCAP_NONE)
- return 0;
- if (e->type >= MAX_IPTUN_ENCAP_OPS)
- return -EINVAL;
- rcu_read_lock();
- ops = rcu_dereference(ip6tun_encaps[e->type]);
- if (likely(ops && ops->encap_hlen))
- hlen = ops->encap_hlen(e);
- rcu_read_unlock();
- return hlen;
- }
- static inline int ip6_tnl_encap(struct sk_buff *skb, struct ip6_tnl *t,
- u8 *protocol, struct flowi6 *fl6)
- {
- const struct ip6_tnl_encap_ops *ops;
- int ret = -EINVAL;
- if (t->encap.type == TUNNEL_ENCAP_NONE)
- return 0;
- if (t->encap.type >= MAX_IPTUN_ENCAP_OPS)
- return -EINVAL;
- rcu_read_lock();
- ops = rcu_dereference(ip6tun_encaps[t->encap.type]);
- if (likely(ops && ops->build_header))
- ret = ops->build_header(skb, &t->encap, protocol, fl6);
- rcu_read_unlock();
- return ret;
- }
- struct ipv6_tlv_tnl_enc_lim {
- __u8 type;
- __u8 length;
- __u8 encap_limit;
- } __packed;
- int ip6_tnl_rcv_ctl(struct ip6_tnl *t, const struct in6_addr *laddr,
- const struct in6_addr *raddr);
- int ip6_tnl_rcv(struct ip6_tnl *tunnel, struct sk_buff *skb,
- const struct tnl_ptk_info *tpi, struct metadata_dst *tun_dst,
- bool log_ecn_error);
- int ip6_tnl_xmit_ctl(struct ip6_tnl *t, const struct in6_addr *laddr,
- const struct in6_addr *raddr);
- int ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev, __u8 dsfield,
- struct flowi6 *fl6, int encap_limit, __u32 *pmtu, __u8 proto);
- __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);
- int ip6_tnl_change_mtu(struct net_device *dev, int new_mtu);
- static inline void ip6tunnel_xmit(struct sock *sk, struct sk_buff *skb,
- struct net_device *dev)
- {
- 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 (dev) {
- if (unlikely(net_xmit_eval(err)))
- pkt_len = -1;
- iptunnel_xmit_stats(dev, pkt_len);
- }
- }
- #endif
- #endif
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