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     )ˆÇÆƒyæ_ÅÀÊ "‡    )/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _IPV6_H
#define _IPV6_H

#include <uapi/linux/ipv6.h>
#include <linux/cache.h>

#include <linux/rh_kabi.h>

#define ipv6_optlen(p)  (((p)->hdrlen+1) << 3)
#define ipv6_authlen(p) (((p)->hdrlen+2) << 2)
/*
 * This structure contains configuration options per IPv6 link.
 */
struct ipv6_devconf {
	/* RX & TX fastpath fields. */
	__cacheline_group_begin(ipv6_devconf_read_txrx);
	__s32		disable_ipv6;
	__s32		hop_limit;
	__s32		mtu6;
	__s32		forwarding;
	__s32		disable_policy;
	__s32		proxy_ndp;
	__cacheline_group_end(ipv6_devconf_read_txrx);

	__s32		accept_ra;
	__s32		accept_redirects;
	__s32		autoconf;
	__s32		dad_transmits;
	__s32		rtr_solicits;
	__s32		rtr_solicit_interval;
	__s32		rtr_solicit_max_interval;
	__s32		rtr_solicit_delay;
	__s32		force_mld_version;
	__s32		mldv1_unsolicited_report_interval;
	__s32		mldv2_unsolicited_report_interval;
	__s32		use_tempaddr;
	__s32		temp_valid_lft;
	__s32		temp_prefered_lft;
	__s32		regen_max_retry;
	__s32		max_desync_factor;
	__s32		max_addresses;
	__s32		accept_ra_defrtr;
	__u32		ra_defrtr_metric;
	__s32		accept_ra_min_hop_limit;
	__s32		accept_ra_pinfo;
	__s32		ignore_routes_with_linkdown;
#ifdef CONFIG_IPV6_ROUTER_PREF
	__s32		accept_ra_rtr_pref;
	__s32		rtr_probe_interval;
#ifdef CONFIG_IPV6_ROUTE_INFO
	__s32		accept_ra_rt_info_min_plen;
	__s32		accept_ra_rt_info_max_plen;
#endif
#endif
	__s32		accept_source_route;
	__s32		accept_ra_from_local;
#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
	__s32		optimistic_dad;
	__s32		use_optimistic;
#endif
#ifdef CONFIG_IPV6_MROUTE
	atomic_t	mc_forwarding;
#endif
	__s32		drop_unicast_in_l2_multicast;
	__s32		accept_dad;
	__s32		force_tllao;
	__s32           ndisc_notify;
	__s32		suppress_frag_ndisc;
	__s32		accept_ra_mtu;
	__s32		drop_unsolicited_na;
	struct ipv6_stable_secret {
		bool initialized;
		struct in6_addr secret;
	} stable_secret;
	__s32		use_oif_addrs_only;
	__s32		keep_addr_on_down;
	__s32		seg6_enabled;
#ifdef CONFIG_IPV6_SEG6_HMAC
	__s32		seg6_require_hmac;
#endif
	__u32		enhanced_dad;
	__u32		addr_gen_mode;
	__s32           ndisc_tclass;
	__s32		rpl_seg_enabled;

	struct ctl_table_header *sysctl_header;

	RH_KABI_RESERVE(1)
	RH_KABI_RESERVE(2)
	RH_KABI_RESERVE(3)
	RH_KABI_RESERVE(4)
	RH_KABI_RESERVE(5)
	RH_KABI_RESERVE(6)
	RH_KABI_RESERVE(7)
	RH_KABI_RESERVE(8)
	RH_KABI_RESERVE(9)
	RH_KABI_RESERVE(10)
	RH_KABI_RESERVE(11)
	RH_KABI_RESERVE(12)
	RH_KABI_RESERVE(13)
	RH_KABI_RESERVE(14)
	RH_KABI_RESERVE(15)
	RH_KABI_RESERVE(16)
};

struct ipv6_params {
	__s32 disable_ipv6;
	__s32 autoconf;
};
extern struct ipv6_params ipv6_defaults;
#include <linux/tcp.h>
#include <linux/udp.h>

#include <net/inet_sock.h>

static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb)
{
	return (struct ipv6hdr *)skb_network_header(skb);
}

static inline struct ipv6hdr *inner_ipv6_hdr(const struct sk_buff *skb)
{
	return (struct ipv6hdr *)skb_inner_network_header(skb);
}

static inline struct ipv6hdr *ipipv6_hdr(const struct sk_buff *skb)
{
	return (struct ipv6hdr *)skb_transport_header(skb);
}

static inline unsigned int ipv6_transport_len(const struct sk_buff *skb)
{
	return ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr) -
	       skb_network_header_len(skb);
}

/* 
   This structure contains results of exthdrs parsing
   as offsets from skb->nh.
 */

struct inet6_skb_parm {
	int			iif;
	__be16			ra;
	__u16			dst0;
	__u16			srcrt;
	__u16			dst1;
	__u16			lastopt;
	__u16			nhoff;
	__u16			flags;
#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
	__u16			dsthao;
#endif
	__u16			frag_max_size;
	__u16			srhoff;

#define IP6SKB_XFRM_TRANSFORMED	1
#define IP6SKB_FORWARDED	2
#define IP6SKB_REROUTED		4
#define IP6SKB_ROUTERALERT	8
#define IP6SKB_FRAGMENTED      16
#define IP6SKB_HOPBYHOP        32
#define IP6SKB_L3SLAVE         64
#define IP6SKB_JUMBOGRAM      128
#define IP6SKB_SEG6	      256
#define IP6SKB_FAKEJUMBO      512
#define IP6SKB_MULTIPATH