drivers: net: Modify WireGuard for backward compat

Change-Id: I1c8e130a514a7b0329f8df8099cc84f4cc8d5822

1 files changed, 1118 insertions, 0 deletions

diff --git a/drivers/net/wireguard/compat/compat.h b/drivers/net/wireguard/compat/compat.h
new file mode 100644
index 000000000000..9f6e725db531
--- /dev/null
+++ b/drivers/net/wireguard/compat/compat.h
@@ -0,0 +1,1118 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
+ */
+
+#ifndef _WG_COMPAT_H
+#define _WG_COMPAT_H
+
+#include <linux/kconfig.h>
+#include <linux/version.h>
+#include <linux/types.h>
+#include <generated/utsrelease.h>
+
+#ifdef RHEL_MAJOR
+#if RHEL_MAJOR == 7
+#define ISRHEL7
+#if RHEL_MINOR == 8
+#define ISCENTOS7
+#endif
+#elif RHEL_MAJOR == 8
+#define ISRHEL8
+#if RHEL_MINOR == 2
+#define ISCENTOS8
+#endif
+#endif
+#endif
+#ifdef UTS_UBUNTU_RELEASE_ABI
+#if LINUX_VERSION_CODE == KERNEL_VERSION(3, 13, 11)
+#define ISUBUNTU1404
+#elif LINUX_VERSION_CODE < KERNEL_VERSION(4, 5, 0) && LINUX_VERSION_CODE >= KERNEL_VERSION(4, 4, 0)
+#define ISUBUNTU1604
+#elif LINUX_VERSION_CODE < KERNEL_VERSION(4, 16, 0) && LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0)
+#define ISUBUNTU1804
+#elif LINUX_VERSION_CODE < KERNEL_VERSION(5, 1, 0) && LINUX_VERSION_CODE >= KERNEL_VERSION(5, 0, 0)
+#define ISUBUNTU1904
+#elif LINUX_VERSION_CODE < KERNEL_VERSION(5, 4, 0) && LINUX_VERSION_CODE >= KERNEL_VERSION(5, 3, 0)
+#define ISUBUNTU1910
+#endif
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 10, 0)
+#error "WireGuard requires Linux >= 3.10"
+#endif
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 6, 0)
+#error "WireGuard has been merged into Linux >= 5.6 and therefore this compatibility module is no longer required."
+#endif
+
+#if defined(ISRHEL7)
+#include <linux/skbuff.h>
+#define headers_end headers_start
+#elif LINUX_VERSION_CODE < KERNEL_VERSION(3, 18, 0)
+#define headers_start data
+#define headers_end data
+#endif
+
+#include <linux/cache.h>
+#include <linux/init.h>
+#ifndef __ro_after_init
+#define __ro_after_init __read_mostly
+#endif
+
+#include <linux/compiler.h>
+#ifndef READ_ONCE
+#define READ_ONCE ACCESS_ONCE
+#endif
+#ifndef WRITE_ONCE
+#ifdef ACCESS_ONCE_RW
+#define WRITE_ONCE(p, v) (ACCESS_ONCE_RW(p) = (v))
+#else
+#define WRITE_ONCE(p, v) (ACCESS_ONCE(p) = (v))
+#endif
+#endif
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 17, 0)
+#include "udp_tunnel/udp_tunnel_partial_compat.h"
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0) && !defined(DEBUG) && defined(net_dbg_ratelimited)
+#undef net_dbg_ratelimited
+#define net_dbg_ratelimited(fmt, ...) do { if (0) no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); } while (0)
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0)
+#include <linux/rcupdate.h>
+#ifndef RCU_LOCKDEP_WARN
+#define RCU_LOCKDEP_WARN(cond, message) rcu_lockdep_assert(!(cond), message)
+#endif
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0) && !defined(ISRHEL7)
+#define ipv6_dst_lookup(a, b, c, d) ipv6_dst_lookup(b, c, d)
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 17, 0) && LINUX_VERSION_CODE >= KERNEL_VERSION(3, 16, 83)
+#define ipv6_dst_lookup_flow(a, b, c, d) ipv6_dst_lookup_flow(b, c, d)
+#elif (LINUX_VERSION_CODE < KERNEL_VERSION(5, 4, 5) && LINUX_VERSION_CODE >= KERNEL_VERSION(5, 4, 0)) || (LINUX_VERSION_CODE < KERNEL_VERSION(5, 3, 18) && LINUX_VERSION_CODE >= KERNEL_VERSION(4, 20, 0) && !defined(ISUBUNTU1904)) || (!defined(ISRHEL8) && !defined(ISDEBIAN) && !defined(ISUBUNTU1804) && LINUX_VERSION_CODE < KERNEL_VERSION(4, 19, 119) && LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0)) || (LINUX_VERSION_CODE < KERNEL_VERSION(4, 14, 181) && LINUX_VERSION_CODE >= KERNEL_VERSION(4, 10, 0)) || (LINUX_VERSION_CODE < KERNEL_VERSION(4, 9, 224) && LINUX_VERSION_CODE >= KERNEL_VERSION(4, 5, 0)) || (LINUX_VERSION_CODE < KERNEL_VERSION(4, 4, 224) && !defined(ISUBUNTU1604) && (!defined(ISRHEL7) || defined(ISCENTOS7)))
+#define ipv6_dst_lookup_flow(a, b, c, d) ipv6_dst_lookup(a, b, &dst, c) + (void *)0 ?: dst
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 12, 0) && IS_ENABLED(CONFIG_IPV6) && !defined(ISRHEL7)
+#include <net/ipv6.h>
+struct ipv6_stub_type {
+	void *udpv6_encap_enable;
+	int (*ipv6_dst_lookup)(struct sock *sk, struct dst_entry **dst, struct flowi6 *fl6);
+};
+static const struct ipv6_stub_type ipv6_stub_impl = {
+	.udpv6_encap_enable = (void *)1,
+	.ipv6_dst_lookup = ip6_dst_lookup
+};
+static const struct ipv6_stub_type *ipv6_stub = &ipv6_stub_impl;
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 8, 0) && IS_ENABLED(CONFIG_IPV6) && !defined(ISRHEL7)
+#include <net/addrconf.h>
+static inline bool ipv6_mod_enabled(void)
+{
+	return ipv6_stub != NULL && ipv6_stub->udpv6_encap_enable != NULL;
+}
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 11, 0) && !defined(ISRHEL7)
+#include <linux/skbuff.h>
+static inline void skb_reset_tc(struct sk_buff *skb)
+{
+#ifdef CONFIG_NET_CLS_ACT
+	skb->tc_verd = 0;
+#endif
+}
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 11, 0)
+#include <linux/random.h>
+#include <linux/siphash.h>
+static inline u32 __compat_get_random_u32(void)
+{
+	static siphash_key_t key;
+	static u32 counter = 0;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 4, 0)
+	static bool has_seeded = false;
+	if (unlikely(!has_seeded)) {
+		get_random_bytes(&key, sizeof(key));
+		has_seeded = true;
+	}
+#else
+	get_random_once(&key, sizeof(key));
+#endif
+	return siphash_2u32(counter++, get_random_int(), &key);
+}
+#define get_random_u32 __compat_get_random_u32
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 18, 0) && !defined(ISRHEL7)
+static inline void netif_keep_dst(struct net_device *dev)
+{
+	dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
+}
+#define COMPAT_CANNOT_USE_CSUM_LEVEL
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 14, 0) && !defined(ISRHEL7)
+#include <linux/netdevice.h>
+#ifndef netdev_alloc_pcpu_stats
+#define pcpu_sw_netstats pcpu_tstats
+#endif
+#ifndef netdev_alloc_pcpu_stats
+#define netdev_alloc_pcpu_stats alloc_percpu
+#endif
+#elif LINUX_VERSION_CODE < KERNEL_VERSION(3, 15, 0) && !defined(ISRHEL7)
+#include <linux/netdevice.h>
+#ifndef netdev_alloc_pcpu_stats
+#define netdev_alloc_pcpu_stats(type)					\
+({									\
+	typeof(type) __percpu *pcpu_stats = alloc_percpu(type);		\
+	if (pcpu_stats)	{						\
+		int __cpu;						\
+		for_each_possible_cpu(__cpu) {				\
+			typeof(type) *stat;				\
+			stat = per_cpu_ptr(pcpu_stats, __cpu);		\
+			u64_stats_init(&stat->syncp);			\
+		}							\
+	}								\
+	pcpu_stats;							\
+})
+#endif
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 14, 0) && !defined(ISRHEL7)
+#include "checksum/checksum_partial_compat.h"
+static inline void *__compat_pskb_put(struct sk_buff *skb, struct sk_buff *tail, int len)
+{
+	if (tail != skb) {
+		skb->data_len += len;
+		skb->len += len;
+	}
+	return skb_put(tail, len);
+}
+#define pskb_put __compat_pskb_put
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 11, 0) && !defined(ISRHEL7)
+#include <net/xfrm.h>
+static inline void skb_scrub_packet(struct sk_buff *skb, bool xnet)
+{
+#ifdef CONFIG_CAVIUM_OCTEON_IPFWD_OFFLOAD
+	memset(&skb->cvm_info, 0, sizeof(skb->cvm_info));
+	skb->cvm_reserved = 0;
+#endif
+	skb->tstamp.tv64 = 0;
+	skb->pkt_type = PACKET_HOST;
+	skb->skb_iif = 0;
+	skb_dst_drop(skb);
+	secpath_reset(skb);
+	nf_reset(skb);
+	nf_reset_trace(skb);
+	if (!xnet)
+		return;
+	skb_orphan(skb);
+	skb->mark = 0;
+}
+#elif LINUX_VERSION_CODE < KERNEL_VERSION(3, 12, 0) && LINUX_VERSION_CODE >= KERNEL_VERSION(3, 11, 0)
+#define skb_scrub_packet(a, b) skb_scrub_packet(a)
+#endif
+
+#if ((LINUX_VERSION_CODE < KERNEL_VERSION(3, 14, 0) && LINUX_VERSION_CODE >= KERNEL_VERSION(3, 13, 0)) || LINUX_VERSION_CODE < KERNEL_VERSION(3, 12, 63) || defined(ISUBUNTU1404)) && !defined(ISRHEL7)
+#include <linux/random.h>
+static inline u32 __compat_prandom_u32_max(u32 ep_ro)
+{
+	return (u32)(((u64)prandom_u32() * ep_ro) >> 32);
+}
+#define prandom_u32_max __compat_prandom_u32_max
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 14, 0)
+#include <linux/kernel.h>
+#ifndef U8_MAX
+#define U8_MAX ((u8)~0U)
+#endif
+#ifndef S8_MAX
+#define S8_MAX ((s8)(U8_MAX >> 1))
+#endif
+#ifndef S8_MIN
+#define S8_MIN ((s8)(-S8_MAX - 1))
+#endif
+#ifndef U16_MAX
+#define U16_MAX ((u16)~0U)
+#endif
+#ifndef S16_MAX
+#define S16_MAX ((s16)(U16_MAX >> 1))
+#endif
+#ifndef S16_MIN
+#define S16_MIN ((s16)(-S16_MAX - 1))
+#endif
+#ifndef U32_MAX
+#define U32_MAX ((u32)~0U)
+#endif
+#ifndef S32_MAX
+#define S32_MAX ((s32)(U32_MAX >> 1))
+#endif
+#ifndef S32_MIN
+#define S32_MIN ((s32)(-S32_MAX - 1))
+#endif
+#ifndef U64_MAX
+#define U64_MAX ((u64)~0ULL)
+#endif
+#ifndef S64_MAX
+#define S64_MAX ((s64)(U64_MAX >> 1))
+#endif
+#ifndef S64_MIN
+#define S64_MIN ((s64)(-S64_MAX - 1))
+#endif
+#endif
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 17, 3) && LINUX_VERSION_CODE >= KERNEL_VERSION(3, 17, 0)) || (LINUX_VERSION_CODE < KERNEL_VERSION(3, 16, 35) && LINUX_VERSION_CODE >= KERNEL_VERSION(3, 15, 0)) || (LINUX_VERSION_CODE < KERNEL_VERSION(3, 14, 24) && LINUX_VERSION_CODE >= KERNEL_VERSION(3, 13, 0) && !defined(ISUBUNTU1404)) || (LINUX_VERSION_CODE < KERNEL_VERSION(3, 12, 33) && LINUX_VERSION_CODE >= KERNEL_VERSION(3, 11, 0)) || (LINUX_VERSION_CODE < KERNEL_VERSION(3, 10, 60) && !defined(ISRHEL7))
+static inline void memzero_explicit(void *s, size_t count)
+{
+	memset(s, 0, count);
+	barrier();
+}
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 12, 0) && !defined(ISRHEL7)
+static const struct in6_addr __compat_in6addr_any = IN6ADDR_ANY_INIT;
+#define in6addr_any __compat_in6addr_any
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 13, 0) && LINUX_VERSION_CODE >= KERNEL_VERSION(4, 2, 0)
+#include <linux/completion.h>
+#include <linux/random.h>
+#include <linux/errno.h>
+struct rng_initializer {
+	struct completion done;
+	struct random_ready_callback cb;
+};
+static inline void rng_initialized_callback(struct random_ready_callback *cb)
+{
+	complete(&container_of(cb, struct rng_initializer, cb)->done);
+}
+static inline int wait_for_random_bytes(void)
+{
+	static bool rng_is_initialized = false;
+	int ret;
+	if (unlikely(!rng_is_initialized)) {
+		struct rng_initializer rng = {
+			.done = COMPLETION_INITIALIZER(rng.done),
+			.cb = { .owner = THIS_MODULE, .func = rng_initialized_callback }
+		};
+		ret = add_random_ready_callback(&rng.cb);
+		if (!ret) {
+			ret = wait_for_completion_interruptible(&rng.done);
+			if (ret) {
+				del_random_ready_callback(&rng.cb);
+				return ret;
+			}
+		} else if (ret != -EALREADY)
+			return ret;
+		rng_is_initialized = true;
+	}
+	return 0;
+}
+#elif LINUX_VERSION_CODE < KERNEL_VERSION(4, 2, 0)
+/* This is a disaster. Without this API, we really have no way of
+ * knowing if it's initialized. We just return that it has and hope
+ * for the best... */
+static inline int wait_for_random_bytes(void)
+{
+	return 0;
+}
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 19, 0) && LINUX_VERSION_CODE >= KERNEL_VERSION(4, 2, 0) && !defined(ISRHEL8)
+#include <linux/random.h>
+#include <linux/slab.h>
+struct rng_is_initialized_callback {
+	struct random_ready_callback cb;
+	atomic_t *rng_state;
+};
+static inline void rng_is_initialized_callback(struct random_ready_callback *cb)
+{
+	struct rng_is_initialized_callback *rdy = container_of(cb, struct rng_is_initialized_callback, cb);
+	atomic_set(rdy->rng_state, 2);
+	kfree(rdy);
+}
+static inline bool rng_is_initialized(void)
+{
+	static atomic_t rng_state = ATOMIC_INIT(0);
+
+	if (atomic_read(&rng_state) == 2)
+		return true;
+
+	if (atomic_cmpxchg(&rng_state, 0, 1) == 0) {
+		int ret;
+		struct rng_is_initialized_callback *rdy = kmalloc(sizeof(*rdy), GFP_ATOMIC);
+		if (!rdy) {
+			atomic_set(&rng_state, 0);
+			return false;
+		}
+		rdy->cb.owner = THIS_MODULE;
+		rdy->cb.func = rng_is_initialized_callback;
+		rdy->rng_state = &rng_state;
+		ret = add_random_ready_callback(&rdy->cb);
+		if (ret)
+			kfree(rdy);
+		if (ret == -EALREADY) {
+			atomic_set(&rng_state, 2);
+			return true;
+		} else if (ret)
+			atomic_set(&rng_state, 0);
+		return false;
+	}
+	return false;
+}
+#elif LINUX_VERSION_CODE < KERNEL_VERSION(4, 2, 0)
+/* This is a disaster. Without this API, we really have no way of
+ * knowing if it's initialized. We just return that it has and hope
+ * for the best... */
+static inline bool rng_is_initialized(void)
+{
+	return true;
+}
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 13, 0)
+static inline int get_random_bytes_wait(void *buf, int nbytes)
+{
+	int ret = wait_for_random_bytes();
+	if (unlikely(ret))
+		return ret;
+	get_random_bytes(buf, nbytes);
+	return 0;
+}
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 11, 0) && !defined(ISRHEL7)
+#define system_power_efficient_wq system_unbound_wq
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 3, 0)
+#include <linux/ktime.h>
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 17, 0)
+#include <linux/hrtimer.h>
+#ifndef ktime_get_real_ts64
+#define timespec64 timespec
+#define ktime_get_real_ts64 ktime_get_real_ts
+#endif
+#else
+#include <linux/timekeeping.h>
+#endif
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 11, 0)
+static inline u64 __compat_jiffies64_to_nsecs(u64 j)
+{
+#if !(NSEC_PER_SEC % HZ)
+	return (NSEC_PER_SEC / HZ) * j;
+#else
+	return div_u64(j * HZ_TO_USEC_NUM, HZ_TO_USEC_DEN) * 1000;
+#endif
+}
+#define jiffies64_to_nsecs __compat_jiffies64_to_nsecs
+#endif
+static inline u64 ktime_get_coarse_boottime_ns(void)
+{
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 17, 0)
+	return ktime_to_ns(ktime_get_boottime());
+#elif (LINUX_VERSION_CODE < KERNEL_VERSION(5, 1, 12) && LINUX_VERSION_CODE >= KERNEL_VERSION(4, 20, 0)) || LINUX_VERSION_CODE < KERNEL_VERSION(4, 19, 53)
+	return ktime_to_ns(ktime_mono_to_any(ns_to_ktime(jiffies64_to_nsecs(get_jiffies_64())), TK_OFFS_BOOT));
+#else
+	return ktime_to_ns(ktime_get_coarse_boottime());
+#endif
+}
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 14, 0)
+#include <linux/inetdevice.h>
+static inline __be32 __compat_confirm_addr_indev(struct in_device *in_dev, __be32 dst,  __be32 local, int scope)
+{
+	int same = 0;
+	__be32 addr = 0;
+	for_ifa(in_dev) {
+		if (!addr && (local == ifa->ifa_local || !local) && ifa->ifa_scope <= scope) {
+			addr = ifa->ifa_local;
+			if (same)
+				break;
+		}
+		if (!same) {
+			same = (!local || inet_ifa_match(local, ifa)) && (!dst || inet_ifa_match(dst, ifa));
+			if (same && addr) {
+				if (local || !dst)
+					break;
+				if (inet_ifa_match(addr, ifa))
+					break;
+				if (ifa->ifa_scope <= scope) {
+					addr = ifa->ifa_local;
+					break;
+				}
+				same = 0;
+			}
+		}
+	} endfor_ifa(in_dev);
+	return same ? addr : 0;
+}
+static inline __be32 __compat_inet_confirm_addr(struct net *net, struct in_device *in_dev, __be32 dst, __be32 local, int scope)
+{
+	__be32 addr = 0;
+	struct net_device *dev;
+	if (in_dev)
+		return __compat_confirm_addr_indev(in_dev, dst, local, scope);
+	rcu_read_lock();
+	for_each_netdev_rcu(net, dev) {
+		in_dev = __in_dev_get_rcu(dev);
+		if (in_dev) {
+			addr = __compat_confirm_addr_indev(in_dev, dst, local, scope);
+			if (addr)
+				break;
+		}
+	}
+	rcu_read_unlock();
+	return addr;
+}
+#define inet_confirm_addr __compat_inet_confirm_addr
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 12, 0)
+#include <linux/vmalloc.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+static inline void *__compat_kvmalloc(size_t size, gfp_t flags)
+{
+	gfp_t kmalloc_flags = flags;
+	void *ret;
+	if (size > PAGE_SIZE) {
+		kmalloc_flags |= __GFP_NOWARN;
+		if (!(kmalloc_flags & __GFP_REPEAT) || (size <= PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER))
+			kmalloc_flags |= __GFP_NORETRY;
+	}
+	ret = kmalloc(size, kmalloc_flags);
+	if (ret || size <= PAGE_SIZE)
+		return ret;
+	return __vmalloc(size, flags, PAGE_KERNEL);
+}
+static inline void *__compat_kvzalloc(size_t size, gfp_t flags)
+{
+	return __compat_kvmalloc(size, flags | __GFP_ZERO);
+}
+#define kvmalloc __compat_kvmalloc
+#define kvzalloc __compat_kvzalloc
+#endif
+
+#if ((LINUX_VERSION_CODE < KERNEL_VERSION(3, 15, 0) && LINUX_VERSION_CODE >= KERNEL_VERSION(3, 13, 0)) || LINUX_VERSION_CODE < KERNEL_VERSION(3, 12, 41)) && !defined(ISUBUNTU1404)
+#include <linux/vmalloc.h>
+#include <linux/mm.h>
+static inline void __compat_kvfree(const void *addr)
+{
+	if (is_vmalloc_addr(addr))
+		vfree(addr);
+	else
+		kfree(addr);
+}
+#define kvfree __compat_kvfree
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 11, 9)
+#include <linux/netdevice.h>
+#define priv_destructor destructor
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 13, 0)
+#define wg_newlink(a,b,c,d,e) wg_newlink(a,b,c,d)
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 12, 0)
+#include <net/netlink.h>
+#include <net/genetlink.h>
+#define nlmsg_parse(a, b, c, d, e, f) nlmsg_parse(a, b, c, d, e)
+#define nla_parse_nested(a, b, c, d, e) nla_parse_nested(a, b, c, d)
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0) && !defined(ISRHEL7)
+static inline struct nlattr **genl_family_attrbuf(const struct genl_family *family)
+{
+	return family->attrbuf;
+}
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 12, 0)
+#define PTR_ERR_OR_ZERO(p) PTR_RET(p)
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 7, 0)
+#include <net/netlink.h>
+#define nla_put_u64_64bit(a, b, c, d) nla_put_u64(a, b, c)
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 6, 0)
+#include <net/genetlink.h>
+#ifndef GENL_UNS_ADMIN_PERM
+#define GENL_UNS_ADMIN_PERM GENL_ADMIN_PERM
+#endif
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0) && !defined(ISRHEL7)
+#include <net/genetlink.h>
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 13, 0)
+#define genl_register_family(a) genl_register_family_with_ops(a, genl_ops, ARRAY_SIZE(genl_ops))
+#define COMPAT_CANNOT_USE_CONST_GENL_OPS
+#else
+#define genl_register_family(a) genl_register_family_with_ops(a, genl_ops)
+#endif
+#define COMPAT_CANNOT_USE_GENL_NOPS
+#endif
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 14, 2) && LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0)) || (LINUX_VERSION_CODE < KERNEL_VERSION(4, 13, 16) && LINUX_VERSION_CODE >= KERNEL_VERSION(4, 10, 0)) || (LINUX_VERSION_CODE < KERNEL_VERSION(4, 9, 65) && LINUX_VERSION_CODE >= KERNEL_VERSION(4, 5, 0)) || (LINUX_VERSION_CODE < KERNEL_VERSION(4, 4, 101) && LINUX_VERSION_CODE >= KERNEL_VERSION(3, 19, 0)) || LINUX_VERSION_CODE < KERNEL_VERSION(3, 18, 84)
+#define __COMPAT_NETLINK_DUMP_BLOCK { \
+	int ret; \
+	skb->end -= nlmsg_total_size(sizeof(int)); \
+	ret = wg_get_device_dump_real(skb, cb); \
+	skb->end += nlmsg_total_size(sizeof(int)); \
+	return ret; \
+}
+#define __COMPAT_NETLINK_DUMP_OVERRIDE
+#else
+#define __COMPAT_NETLINK_DUMP_BLOCK return wg_get_device_dump_real(skb, cb);
+#endif
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 15, 8) && LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0)) || (LINUX_VERSION_CODE < KERNEL_VERSION(4, 14, 25) && LINUX_VERSION_CODE >= KERNEL_VERSION(4, 10, 0)) || LINUX_VERSION_CODE < KERNEL_VERSION(4, 9, 87)
+#define wg_get_device_dump(a, b) wg_get_device_dump_real(a, b); \
+static int wg_get_device_dump(a, b) { \
+	struct wg_device *wg = (struct wg_device *)cb->args[0]; \
+	if (!wg) { \
+		int ret = wg_get_device_start(cb); \
+		if (ret) \
+			return ret; \
+	} \
+	__COMPAT_NETLINK_DUMP_BLOCK \
+} \
+static int wg_get_device_dump_real(a, b)
+#define COMPAT_CANNOT_USE_NETLINK_START
+#elif defined(__COMPAT_NETLINK_DUMP_OVERRIDE)
+#define wg_get_device_dump(a, b) wg_get_device_dump_real(a, b); \
+static int wg_get_device_dump(a, b) { \
+	__COMPAT_NETLINK_DUMP_BLOCK \
+} \
+static int wg_get_device_dump_real(a, b)
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 17, 0)
+#define COMPAT_CANNOT_USE_IN6_DEV_GET
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0)
+#define COMPAT_CANNOT_USE_IFF_NO_QUEUE
+#endif
+
+#if defined(CONFIG_X86_64) && LINUX_VERSION_CODE < KERNEL_VERSION(4, 4, 0)
+#include <asm/user.h>
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 2, 0)
+#include <asm/xsave.h>
+#include <asm/xcr.h>
+static inline int cpu_has_xfeatures(u64 xfeatures_needed, const char **feature_name)
+{
+	return boot_cpu_has(X86_FEATURE_XSAVE) && xgetbv(XCR_XFEATURE_ENABLED_MASK) & xfeatures_needed;
+}
+#endif
+#ifndef XFEATURE_MASK_YMM
+#define XFEATURE_MASK_YMM XSTATE_YMM
+#endif
+#ifndef XFEATURE_MASK_SSE
+#define XFEATURE_MASK_SSE XSTATE_SSE
+#endif
+#ifndef XSTATE_AVX512
+#define XSTATE_AVX512 (XSTATE_OPMASK | XSTATE_ZMM_Hi256 | XSTATE_Hi16_ZMM)
+#endif
+#ifndef XFEATURE_MASK_AVX512
+#define XFEATURE_MASK_AVX512 XSTATE_AVX512
+#endif
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 6, 0) && defined(CONFIG_X86_64)
+/* This is incredibly dumb and reckless, but as it turns out, there's
+ * not really hardware Linux runs properly on that supports F but not BW
+ * and VL, so in practice this isn't so bad. Plus, this is compat layer,
+ * so the bar remains fairly low.
+ */
+#include <asm/cpufeature.h>
+#ifndef X86_FEATURE_AVX512BW
+#define X86_FEATURE_AVX512BW X86_FEATURE_AVX512F
+#endif
+#ifndef X86_FEATURE_AVX512VL
+#define X86_FEATURE_AVX512VL X86_FEATURE_AVX512F
+#endif
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 11, 0)
+struct __compat_dummy_container { char dev; };
+#define netdev_notifier_info net_device *)data); __attribute((unused)) char __compat_dummy_variable = ((struct __compat_dummy_container
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 14, 0)
+#define timer_setup(a, b, c) setup_timer(a, ((void (*)(unsigned long))b), ((unsigned long)a))
+#define from_timer(var, callback_timer, timer_fieldname) container_of(callback_timer, typeof(*var), timer_fieldname)
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 14, 3)
+#define COMPAT_CANNOT_USE_AVX512
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 15, 0)
+#include <net/genetlink.h>
+#define genl_dump_check_consistent(a, b) genl_dump_check_consistent(a, b, &genl_family)
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 13, 0) && !defined(ISRHEL7)
+static inline void *skb_put_data(struct sk_buff *skb, const void *data, unsigned int len)
+{
+	void *tmp = skb_put(skb, len);
+	memcpy(tmp, data, len);
+	return tmp;
+}
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 19, 0) && !defined(ISRHEL7)
+#define napi_complete_done(n, work_done) napi_complete(n)
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 5, 0)
+#include <linux/netdevice.h>
+/* NAPI_STATE_SCHED gets set by netif_napi_add anyway, so this is safe.
+ * Also, kernels without NAPI_STATE_NO_BUSY_POLL don't have a call to
+ * napi_hash_add inside of netif_napi_add.
+ */
+#define NAPI_STATE_NO_BUSY_POLL NAPI_STATE_SCHED
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 14, 0)
+#include <linux/atomic.h>
+#ifndef atomic_read_acquire
+#define atomic_read_acquire(v) ({ int __compat_p1 = atomic_read(v); smp_rmb(); __compat_p1; })
+#endif
+#ifndef atomic_set_release
+#define atomic_set_release(v, i) ({ smp_wmb(); atomic_set(v, i); })
+#endif
+#elif LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0)
+#include <linux/atomic.h>
+#ifndef atomic_read_acquire
+#define atomic_read_acquire(v) smp_load_acquire(&(v)->counter)
+#endif
+#ifndef atomic_set_release
+#define atomic_set_release(v, i) smp_store_release(&(v)->counter, (i))
+#endif
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 17, 0)
+static inline void le32_to_cpu_array(u32 *buf, unsigned int words)
+{
+	while (words--) {
+		__le32_to_cpus(buf);
+		buf++;
+	}
+}
+static inline void cpu_to_le32_array(u32 *buf, unsigned int words)
+{
+	while (words--) {
+		__cpu_to_le32s(buf);
+		buf++;
+	}
+}
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 14, 0)
+#include <crypto/algapi.h>
+static inline void crypto_xor_cpy(u8 *dst, const u8 *src1, const u8 *src2,
+				  unsigned int size)
+{
+	if (IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) &&
+	    __builtin_constant_p(size) &&
+	    (size % sizeof(unsigned long)) == 0) {
+		unsigned long *d = (unsigned long *)dst;
+		unsigned long *s1 = (unsigned long *)src1;
+		unsigned long *s2 = (unsigned long *)src2;
+
+		while (size > 0) {
+			*d++ = *s1++ ^ *s2++;
+			size -= sizeof(unsigned long);
+		}
+	} else {
+		if (unlikely(dst != src1))
+			memmove(dst, src1, size);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 11, 0)
+		crypto_xor(dst, src2, size);
+#else
+		__crypto_xor(dst, src2, size);
+#endif
+	}
+}
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 17, 0)
+#define read_cpuid_part() read_cpuid_part_number()
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 17, 0) && !defined(ISRHEL7)
+#define hlist_add_behind(a, b) hlist_add_after(b, a)
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 0, 0)
+#define totalram_pages() totalram_pages
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 18, 0)
+struct __kernel_timespec {
+	int64_t tv_sec, tv_nsec;
+};
+#elif LINUX_VERSION_CODE < KERNEL_VERSION(5, 1, 0)
+#include <linux/time64.h>
+#ifdef __kernel_timespec
+#undef __kernel_timespec
+struct __kernel_timespec {
+	int64_t tv_sec, tv_nsec;
+};
+#endif
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 12, 0)
+#include <linux/kernel.h>
+#ifndef ALIGN_DOWN
+#define ALIGN_DOWN(x, a) __ALIGN_KERNEL((x) - ((a) - 1), (a))
+#endif
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 1, 0) && !defined(ISRHEL8)
+#include <linux/skbuff.h>
+#define skb_probe_transport_header(a) skb_probe_transport_header(a, 0)
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 16, 0) && !defined(ISRHEL7)
+#define ignore_df local_df
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 1, 0) && !defined(ISRHEL8)
+/* Note that all intentional uses of the non-_bh variety need to explicitly
+ * undef these, conditionalized on COMPAT_CANNOT_DEPRECIATE_BH_RCU.
+ */
+#include <linux/rcupdate.h>
+static __always_inline void old_synchronize_rcu(void)
+{
+	synchronize_rcu();
+}
+static __always_inline void old_call_rcu(void *a, void *b)
+{
+	call_rcu(a, b);
+}
+static __always_inline void old_rcu_barrier(void)
+{
+	rcu_barrier();
+}
+#ifdef synchronize_rcu
+#undef synchronize_rcu
+#endif
+#ifdef call_rcu
+#undef call_rcu
+#endif
+#ifdef rcu_barrier
+#undef rcu_barrier
+#endif
+#define synchronize_rcu synchronize_rcu_bh
+#define call_rcu call_rcu_bh
+#define rcu_barrier rcu_barrier_bh
+#define COMPAT_CANNOT_DEPRECIATE_BH_RCU
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 19, 10) && !defined(ISRHEL8)
+static inline void skb_mark_not_on_list(struct sk_buff *skb)
+{
+	skb->next = NULL;
+}
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 20, 0) && !defined(ISRHEL8)
+#define NLA_POLICY_EXACT_LEN(_len) { .type = NLA_UNSPEC, .len = _len }
+#endif
+#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 2, 0) && !defined(ISRHEL8)
+#define NLA_POLICY_MIN_LEN(_len) { .type = NLA_UNSPEC, .len = _len }
+#define COMPAT_CANNOT_INDIVIDUAL_NETLINK_OPS_POLICY
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 2, 0) && defined(__aarch64__)
+#define cpu_have_named_feature(name) (elf_hwcap & (HWCAP_ ## name))
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 1, 0)
+#include <linux/stddef.h>
+#ifndef offsetofend
+#define offsetofend(TYPE, MEMBER) (offsetof(TYPE, MEMBER) + sizeof(((TYPE *)0)->MEMBER))
+#endif
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 5, 0)
+#define genl_dumpit_info(cb) ({ \
+	struct { struct nlattr **attrs; } *a = (void *)((u8 *)cb->args + offsetofend(struct dump_ctx, next_allowedip)); \
+	BUILD_BUG_ON(sizeof(cb->args) < offsetofend(struct dump_ctx, next_allowedip) + sizeof(*a)); \
+	a->attrs = genl_family_attrbuf(&genl_family); \
+	if (nlmsg_parse(cb->nlh, GENL_HDRLEN + genl_family.hdrsize, a->attrs, genl_family.maxattr, device_policy, NULL) < 0) \
+		memset(a->attrs, 0, (genl_family.maxattr + 1) * sizeof(struct nlattr *)); \
+	a; \
+})
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 6, 0)
+#include <linux/skbuff.h>
+#ifndef skb_list_walk_safe
+#define skb_list_walk_safe(first, skb, next)                                   \
+	for ((skb) = (first), (next) = (skb) ? (skb)->next : NULL; (skb);      \
+	     (skb) = (next), (next) = (skb) ? (skb)->next : NULL)
+#endif
+#endif
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 5, 0)
+#define blake2s_init zinc_blake2s_init
+#define blake2s_init_key zinc_blake2s_init_key
+#define blake2s_update zinc_blake2s_update
+#define blake2s_final zinc_blake2s_final
+#define blake2s_hmac zinc_blake2s_hmac
+#define chacha20 zinc_chacha20
+#define hchacha20 zinc_hchacha20
+#define chacha20poly1305_encrypt zinc_chacha20poly1305_encrypt
+#define chacha20poly1305_encrypt_sg_inplace zinc_chacha20poly1305_encrypt_sg_inplace
+#define chacha20poly1305_decrypt zinc_chacha20poly1305_decrypt
+#define chacha20poly1305_decrypt_sg_inplace zinc_chacha20poly1305_decrypt_sg_inplace
+#define xchacha20poly1305_encrypt zinc_xchacha20poly1305_encrypt
+#define xchacha20poly1305_decrypt zinc_xchacha20poly1305_decrypt
+#define curve25519 zinc_curve25519
+#define curve25519_generate_secret zinc_curve25519_generate_secret
+#define curve25519_generate_public zinc_curve25519_generate_public
+#define poly1305_init zinc_poly1305_init
+#define poly1305_update zinc_poly1305_update
+#define poly1305_final zinc_poly1305_final
+#define blake2s_compress_ssse3 zinc_blake2s_compress_ssse3
+#define blake2s_compress_avx512 zinc_blake2s_compress_avx512
+#define poly1305_init_arm zinc_poly1305_init_arm
+#define poly1305_blocks_arm zinc_poly1305_blocks_arm
+#define poly1305_emit_arm zinc_poly1305_emit_arm
+#define poly1305_blocks_neon zinc_poly1305_blocks_neon
+#define poly1305_emit_neon zinc_poly1305_emit_neon
+#define poly1305_init_mips zinc_poly1305_init_mips
+#define poly1305_blocks_mips zinc_poly1305_blocks_mips
+#define poly1305_emit_mips zinc_poly1305_emit_mips
+#define poly1305_init_x86_64 zinc_poly1305_init_x86_64
+#define poly1305_blocks_x86_64 zinc_poly1305_blocks_x86_64
+#define poly1305_emit_x86_64 zinc_poly1305_emit_x86_64
+#define poly1305_emit_avx zinc_poly1305_emit_avx
+#define poly1305_blocks_avx zinc_poly1305_blocks_avx
+#define poly1305_blocks_avx2 zinc_poly1305_blocks_avx2
+#define poly1305_blocks_avx512 zinc_poly1305_blocks_avx512
+#define curve25519_neon zinc_curve25519_neon
+#define hchacha20_ssse3 zinc_hchacha20_ssse3
+#define chacha20_ssse3 zinc_chacha20_ssse3
+#define chacha20_avx2 zinc_chacha20_avx2
+#define chacha20_avx512 zinc_chacha20_avx512
+#define chacha20_avx512vl zinc_chacha20_avx512vl
+#define chacha20_mips zinc_chacha20_mips
+#define chacha20_arm zinc_chacha20_arm
+#define hchacha20_arm zinc_hchacha20_arm
+#define chacha20_neon zinc_chacha20_neon
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 19, 0) && !defined(ISRHEL7)
+#include <linux/skbuff.h>
+static inline int skb_ensure_writable(struct sk_buff *skb, int write_len)
+{
+	if (!pskb_may_pull(skb, write_len))
+		return -ENOMEM;
+
+	if (!skb_cloned(skb) || skb_clone_writable(skb, write_len))
+		return 0;
+
+	return pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
+}
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 6, 0)
+#if IS_ENABLED(CONFIG_NF_NAT)
+#include <linux/ip.h>
+#include <linux/icmpv6.h>
+#include <net/ipv6.h>
+#include <net/icmp.h>
+#include <net/netfilter/nf_conntrack.h>
+#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 1, 0) && !defined(ISRHEL8)
+#include <net/netfilter/nf_nat_core.h>
+#endif
+static inline void __compat_icmp_ndo_send(struct sk_buff *skb_in, int type, int code, __be32 info)
+{
+	struct sk_buff *cloned_skb = NULL;
+	enum ip_conntrack_info ctinfo;
+	struct nf_conn *ct;
+	__be32 orig_ip;
+
+	ct = nf_ct_get(skb_in, &ctinfo);
+	if (!ct || !(ct->status & IPS_SRC_NAT)) {
+		icmp_send(skb_in, type, code, info);
+		return;
+	}
+
+	if (skb_shared(skb_in))
+		skb_in = cloned_skb = skb_clone(skb_in, GFP_ATOMIC);
+
+	if (unlikely(!skb_in || skb_network_header(skb_in) < skb_in->head ||
+	    (skb_network_header(skb_in) + sizeof(struct iphdr)) >
+	    skb_tail_pointer(skb_in) || skb_ensure_writable(skb_in,
+	    skb_network_offset(skb_in) + sizeof(struct iphdr))))
+		goto out;
+
+	orig_ip = ip_hdr(skb_in)->saddr;
+	ip_hdr(skb_in)->saddr = ct->tuplehash[0].tuple.src.u3.ip;
+	icmp_send(skb_in, type, code, info);
+	ip_hdr(skb_in)->saddr = orig_ip;
+out:
+	consume_skb(cloned_skb);
+}
+static inline void __compat_icmpv6_ndo_send(struct sk_buff *skb_in, u8 type, u8 code, __u32 info)
+{
+	struct sk_buff *cloned_skb = NULL;
+	enum ip_conntrack_info ctinfo;
+	struct in6_addr orig_ip;
+	struct nf_conn *ct;
+
+	ct = nf_ct_get(skb_in, &ctinfo);
+	if (!ct || !(ct->status & IPS_SRC_NAT)) {
+		icmpv6_send(skb_in, type, code, info);
+		return;
+	}
+
+	if (skb_shared(skb_in))
+		skb_in = cloned_skb = skb_clone(skb_in, GFP_ATOMIC);
+
+	if (unlikely(!skb_in || skb_network_header(skb_in) < skb_in->head ||
+	    (skb_network_header(skb_in) + sizeof(struct ipv6hdr)) >
+	    skb_tail_pointer(skb_in) || skb_ensure_writable(skb_in,
+	    skb_network_offset(skb_in) + sizeof(struct ipv6hdr))))
+		goto out;
+
+	orig_ip = ipv6_hdr(skb_in)->saddr;
+	ipv6_hdr(skb_in)->saddr = ct->tuplehash[0].tuple.src.u3.in6;
+	icmpv6_send(skb_in, type, code, info);
+	ipv6_hdr(skb_in)->saddr = orig_ip;
+out:
+	consume_skb(cloned_skb);
+}
+#else
+#define __compat_icmp_ndo_send icmp_send
+#define __compat_icmpv6_ndo_send icmpv6_send
+#endif
+#define icmp_ndo_send __compat_icmp_ndo_send
+#define icmpv6_ndo_send __compat_icmpv6_ndo_send
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 10, 0)
+#define COMPAT_CANNOT_USE_MAX_MTU
+#endif
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 5, 14) && LINUX_VERSION_CODE >= KERNEL_VERSION(5, 5, 0)) || (LINUX_VERSION_CODE < KERNEL_VERSION(5, 4, 29) && !defined(ISUBUNTU1910) && !defined(ISUBUNTU1904) && (!defined(ISRHEL8) || defined(ISCENTOS8)))
+#include <linux/skbuff.h>
+#include <net/sch_generic.h>
+static inline void skb_reset_redirect(struct sk_buff *skb)
+{
+#ifdef CONFIG_NET_SCHED
+	skb_reset_tc(skb);
+#endif
+}
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 14, 0) && !defined(ISRHEL7)
+#define skb_get_hash skb_get_rxhash
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 15, 0) && !defined(ISRHEL7)
+#define hash rxhash
+#define l4_hash l4_rxhash
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 17, 0) && !defined(ISRHEL7)
+#define sw_hash ignore_df = 0; skb->nf_trace = skb->ooo_okay
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 3, 0)
+#define pre_exit exit
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 8, 0)
+#include <linux/skbuff.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+static inline __be16 ip_tunnel_parse_protocol(const struct sk_buff *skb)
+{
+	if (skb_network_header(skb) >= skb->head &&
+	    (skb_network_header(skb) + sizeof(struct iphdr)) <= skb_tail_pointer(skb) &&
+	    ip_hdr(skb)->version == 4)
+		return htons(ETH_P_IP);
+	if (skb_network_header(skb) >= skb->head &&
+	    (skb_network_header(skb) + sizeof(struct ipv6hdr)) <= skb_tail_pointer(skb) &&
+	    ipv6_hdr(skb)->version == 6)
+		return htons(ETH_P_IPV6);
+	return 0;
+}
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 1, 0) || defined(ISRHEL8)
+static const struct header_ops ip_tunnel_header_ops = { .parse_protocol = ip_tunnel_parse_protocol };
+#else
+#define header_ops hard_header_len
+#define ip_tunnel_header_ops *(char *)0 - (char *)0
+#endif
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 9, 0)
+#define kfree_sensitive(a) kzfree(a)
+#endif
+
+#if defined(ISUBUNTU1604) || defined(ISRHEL7)
+#include <linux/siphash.h>
+#ifndef _WG_LINUX_SIPHASH_H
+#define hsiphash_1u32 siphash_1u32
+#define hsiphash_2u32 siphash_2u32
+#define hsiphash_3u32 siphash_3u32
+#define hsiphash_key_t siphash_key_t
+#endif
+#endif
+
+#ifdef CONFIG_VE
+#include <linux/netdev_features.h>
+#ifdef NETIF_F_VIRTUAL
+#undef NETIF_F_LLTX
+#define NETIF_F_LLTX (__NETIF_F(LLTX) | __NETIF_F(VIRTUAL))
+#endif
+#endif
+
+/* https://github.com/ClangBuiltLinux/linux/issues/7 */
+#if defined( __clang__) && (!defined(CONFIG_CLANG_VERSION) || CONFIG_CLANG_VERSION < 80000)
+#include <linux/bug.h>
+#undef BUILD_BUG_ON
+#define BUILD_BUG_ON(x)
+#endif
+
+/* PaX compatibility */
+#ifdef CONSTIFY_PLUGIN
+#include <linux/cache.h>
+#undef __read_mostly
+#define __read_mostly
+#endif
+#if (defined(RAP_PLUGIN) || defined(CONFIG_CFI_CLANG)) && LINUX_VERSION_CODE < KERNEL_VERSION(4, 15, 0)
+#include <linux/timer.h>
+#define wg_expired_retransmit_handshake(a) wg_expired_retransmit_handshake(unsigned long timer)
+#define wg_expired_send_keepalive(a) wg_expired_send_keepalive(unsigned long timer)
+#define wg_expired_new_handshake(a) wg_expired_new_handshake(unsigned long timer)
+#define wg_expired_zero_key_material(a) wg_expired_zero_key_material(unsigned long timer)
+#define wg_expired_send_persistent_keepalive(a) wg_expired_send_persistent_keepalive(unsigned long timer)
+#undef timer_setup
+#define timer_setup(a, b, c) setup_timer(a, ((void (*)(unsigned long))b), ((unsigned long)a))
+#undef from_timer
+#define from_timer(var, callback_timer, timer_fieldname) container_of((struct timer_list *)callback_timer, typeof(*var), timer_fieldname)
+#endif
+
+#endif /* _WG_COMPAT_H */