Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) #ifndef _NET_IP6_TUNNEL_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3) #define _NET_IP6_TUNNEL_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) #include <linux/ipv6.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <linux/if_tunnel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/ip6_tunnel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <net/ip_tunnels.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <net/dst_cache.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #define IP6TUNNEL_ERR_TIMEO (30*HZ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) /* capable of sending packets */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #define IP6_TNL_F_CAP_XMIT 0x10000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) /* capable of receiving packets */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #define IP6_TNL_F_CAP_RCV 0x20000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) /* determine capability on a per-packet basis */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #define IP6_TNL_F_CAP_PER_PACKET 0x40000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) struct __ip6_tnl_parm {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 	char name[IFNAMSIZ];	/* name of tunnel device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 	int link;		/* ifindex of underlying L2 interface */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	__u8 proto;		/* tunnel protocol */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	__u8 encap_limit;	/* encapsulation limit for tunnel */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	__u8 hop_limit;		/* hop limit for tunnel */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	bool collect_md;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	__be32 flowinfo;	/* traffic class and flowlabel for tunnel */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	__u32 flags;		/* tunnel flags */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	struct in6_addr laddr;	/* local tunnel end-point address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	struct in6_addr raddr;	/* remote tunnel end-point address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	__be16			i_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	__be16			o_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	__be32			i_key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	__be32			o_key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	__u32			fwmark;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	__u32			index;	/* ERSPAN type II index */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	__u8			erspan_ver;	/* ERSPAN version */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	__u8			dir;	/* direction */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	__u16			hwid;	/* hwid */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) /* IPv6 tunnel */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) struct ip6_tnl {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	struct ip6_tnl __rcu *next;	/* next tunnel in list */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	struct net_device *dev;	/* virtual device associated with tunnel */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	struct net *net;	/* netns for packet i/o */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	struct __ip6_tnl_parm parms;	/* tunnel configuration parameters */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	struct flowi fl;	/* flowi template for xmit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	struct dst_cache dst_cache;	/* cached dst */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	struct gro_cells gro_cells;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	int err_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	unsigned long err_time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	/* These fields used only by GRE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	__u32 i_seqno;	/* The last seen seqno	*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	__u32 o_seqno;	/* The last output seqno */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	int hlen;       /* tun_hlen + encap_hlen */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	int tun_hlen;	/* Precalculated header length */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	int encap_hlen; /* Encap header length (FOU,GUE) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	struct ip_tunnel_encap encap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	int mlink;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) struct ip6_tnl_encap_ops {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	size_t (*encap_hlen)(struct ip_tunnel_encap *e);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	int (*build_header)(struct sk_buff *skb, struct ip_tunnel_encap *e,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 			    u8 *protocol, struct flowi6 *fl6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 			   u8 type, u8 code, int offset, __be32 info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) #ifdef CONFIG_INET
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) extern const struct ip6_tnl_encap_ops __rcu *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 		ip6tun_encaps[MAX_IPTUN_ENCAP_OPS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) int ip6_tnl_encap_add_ops(const struct ip6_tnl_encap_ops *ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 			  unsigned int num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) int ip6_tnl_encap_del_ops(const struct ip6_tnl_encap_ops *ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 			  unsigned int num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) int ip6_tnl_encap_setup(struct ip6_tnl *t,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 			struct ip_tunnel_encap *ipencap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) static inline int ip6_encap_hlen(struct ip_tunnel_encap *e)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	const struct ip6_tnl_encap_ops *ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	int hlen = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	if (e->type == TUNNEL_ENCAP_NONE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	if (e->type >= MAX_IPTUN_ENCAP_OPS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	ops = rcu_dereference(ip6tun_encaps[e->type]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	if (likely(ops && ops->encap_hlen))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		hlen = ops->encap_hlen(e);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	return hlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) static inline int ip6_tnl_encap(struct sk_buff *skb, struct ip6_tnl *t,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 				u8 *protocol, struct flowi6 *fl6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	const struct ip6_tnl_encap_ops *ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	int ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	if (t->encap.type == TUNNEL_ENCAP_NONE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	if (t->encap.type >= MAX_IPTUN_ENCAP_OPS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	ops = rcu_dereference(ip6tun_encaps[t->encap.type]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	if (likely(ops && ops->build_header))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 		ret = ops->build_header(skb, &t->encap, protocol, fl6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) /* Tunnel encapsulation limit destination sub-option */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) struct ipv6_tlv_tnl_enc_lim {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	__u8 type;		/* type-code for option         */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	__u8 length;		/* option length                */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	__u8 encap_limit;	/* tunnel encapsulation limit   */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) int ip6_tnl_rcv_ctl(struct ip6_tnl *t, const struct in6_addr *laddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 		const struct in6_addr *raddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) int ip6_tnl_rcv(struct ip6_tnl *tunnel, struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 		const struct tnl_ptk_info *tpi, struct metadata_dst *tun_dst,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		bool log_ecn_error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) int ip6_tnl_xmit_ctl(struct ip6_tnl *t, const struct in6_addr *laddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		     const struct in6_addr *raddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) int ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev, __u8 dsfield,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		 struct flowi6 *fl6, int encap_limit, __u32 *pmtu, __u8 proto);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) __u16 ip6_tnl_parse_tlv_enc_lim(struct sk_buff *skb, __u8 *raw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) __u32 ip6_tnl_get_cap(struct ip6_tnl *t, const struct in6_addr *laddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 			     const struct in6_addr *raddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) struct net *ip6_tnl_get_link_net(const struct net_device *dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) int ip6_tnl_get_iflink(const struct net_device *dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) int ip6_tnl_change_mtu(struct net_device *dev, int new_mtu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) static inline void ip6tunnel_xmit(struct sock *sk, struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 				  struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	int pkt_len, err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	memset(skb->cb, 0, sizeof(struct inet6_skb_parm));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	pkt_len = skb->len - skb_inner_network_offset(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	err = ip6_local_out(dev_net(skb_dst(skb)->dev), sk, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	if (dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		if (unlikely(net_xmit_eval(err)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 			pkt_len = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		iptunnel_xmit_stats(dev, pkt_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) #endif