Something went wrong. Try again.
(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
Something went wrong. Try again.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187/* 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 (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 */ bool collect_md; __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 */
IP_TUNNEL_DECLARE_FLAGS(i_flags); IP_TUNNEL_DECLARE_FLAGS(o_flags); __be32 i_key; __be32 o_key;
__u32 fwmark; __u32 index; /* ERSPAN type II index */ __u8 erspan_ver; /* ERSPAN version */ __u8 dir; /* direction */ __u16 hwid; /* hwid */};
/* IPv6 tunnel */struct ip6_tnl { struct ip6_tnl __rcu *next; /* next tunnel in list */ struct hlist_node hash_node; struct net_device *dev; /* virtual device associated with tunnel */ netdevice_tracker dev_tracker; 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 */ struct gro_cells gro_cells;
int err_count; unsigned long err_time;
/* These fields used only by GRE */ __u32 i_seqno; /* The last seen seqno */ atomic_t o_seqno; /* The last output seqno */ int hlen; /* tun_hlen + encap_hlen */ int tun_hlen; /* Precalculated header length */ int encap_hlen; /* Encap header length (FOU,GUE) */ 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); int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, u8 type, u8 code, int offset, __be32 info);};
#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;}
/* 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_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, u16 ip6cb_flags){ int pkt_len, err;
if (unlikely(dev_recursion_level() > IP_TUNNEL_RECURSION_LIMIT)) { if (dev) { net_crit_ratelimited("Dead loop on virtual device %s, fix it urgently!\n", dev->name); DEV_STATS_INC(dev, tx_errors); } kfree_skb_reason(skb, SKB_DROP_REASON_RECURSION_LIMIT); return; }
dev_xmit_recursion_inc();
memset(skb->cb, 0, sizeof(struct inet6_skb_parm)); IP6CB(skb)->flags = ip6cb_flags; pkt_len = skb->len - skb_inner_network_offset(skb); err = ip6_local_out(skb_dst_dev_net(skb), sk, skb);
if (dev) { if (unlikely(net_xmit_eval(err))) pkt_len = -1; iptunnel_xmit_stats(dev, pkt_len); }
dev_xmit_recursion_dec();}#endif#endif