linux/include/net/ip6_tunnel.h

/* SPDX-License-Identifier: GPL-2.0 */
#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 …

/* capable of sending packets */
#define IP6_TNL_F_CAP_XMIT …
/* capable of receiving packets */
#define IP6_TNL_F_CAP_RCV …
/* determine capability on a per-packet basis */
#define IP6_TNL_F_CAP_PER_PACKET …

struct __ip6_tnl_parm { … };

/* IPv6 tunnel */
struct ip6_tnl { … };

struct ip6_tnl_encap_ops { … };

#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)
{ … }

static inline int ip6_tnl_encap(struct sk_buff *skb, struct ip6_tnl *t,
				u8 *protocol, struct flowi6 *fl6)
{ … }

/* Tunnel encapsulation limit destination sub-option */

struct ipv6_tlv_tnl_enc_lim { … } __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)
{ … }
#endif
#endif