diff --git a/autobuild_mac80211_release/target/linux/mediatek/patches-5.4/9999-9-flow-offload-add-mtkhnat-netlink.patch b/autobuild_mac80211_release/target/linux/mediatek/patches-5.4/9999-9-flow-offload-add-mtkhnat-netlink.patch
new file mode 100644
index 0000000..3b9e863
--- /dev/null
+++ b/autobuild_mac80211_release/target/linux/mediatek/patches-5.4/9999-9-flow-offload-add-mtkhnat-netlink.patch
@@ -0,0 +1,337 @@
+diff --git a/include/net/netfilter/nf_flow_table.h b/include/net/netfilter/nf_flow_table.h
+index 8a84de3..1a23c03 100644
+--- a/include/net/netfilter/nf_flow_table.h
++++ b/include/net/netfilter/nf_flow_table.h
+@@ -276,6 +276,7 @@ int nf_flow_table_init(struct nf_flowtable *flow_table);
+ void nf_flow_table_free(struct nf_flowtable *flow_table);
+ 
+ void flow_offload_teardown(struct flow_offload *flow);
++void flow_offload_teardown_by_tuple(struct flow_offload_tuple *tuple);
+ 
+ int nf_flow_table_iterate(struct nf_flowtable *flow_table,
+ 			  void (*iter)(struct flow_offload *flow, void *data),
+diff --git a/include/uapi/linux/netfilter/nfnetlink.h b/include/uapi/linux/netfilter/nfnetlink.h
+index 5bc960f..603d9c0 100644
+--- a/include/uapi/linux/netfilter/nfnetlink.h
++++ b/include/uapi/linux/netfilter/nfnetlink.h
+@@ -60,7 +60,8 @@ struct nfgenmsg {
+ #define NFNL_SUBSYS_CTHELPER		9
+ #define NFNL_SUBSYS_NFTABLES		10
+ #define NFNL_SUBSYS_NFT_COMPAT		11
+-#define NFNL_SUBSYS_COUNT		12
++#define NFNL_SUBSYS_FLOWTABLE		12
++#define NFNL_SUBSYS_COUNT		13
+ 
+ /* Reserved control nfnetlink messages */
+ #define NFNL_MSG_BATCH_BEGIN		NLMSG_MIN_TYPE
+diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig
+index 5d690ab..8ec87aa 100644
+--- a/net/netfilter/Kconfig
++++ b/net/netfilter/Kconfig
+@@ -708,6 +708,15 @@ config NF_FLOW_TABLE
+ 
+ 	  To compile it as a module, choose M here.
+ 
++config NF_FLOW_TABLE_NETLINK
++	tristate "Netfilter flow table netlink module"
++	depends on NETFILTER_INGRESS
++	depends on NF_CONNTRACK
++	help
++	  This option adds the flow table core infrastructure.
++
++	  To compile it as a module, choose M here.
++
+ config NETFILTER_XTABLES
+ 	tristate "Netfilter Xtables support (required for ip_tables)"
+ 	default m if NETFILTER_ADVANCED=n
+diff --git a/net/netfilter/Makefile b/net/netfilter/Makefile
+index d93a121..fa6ffb1 100644
+--- a/net/netfilter/Makefile
++++ b/net/netfilter/Makefile
+@@ -124,6 +124,7 @@ nf_flow_table-objs		:= nf_flow_table_core.o nf_flow_table_ip.o \
+ 				   nf_flow_table_offload.o
+ 
+ obj-$(CONFIG_NF_FLOW_TABLE_INET) += nf_flow_table_inet.o
++obj-$(CONFIG_NF_FLOW_TABLE_NETLINK)	+= nf_flow_table_netlink.o
+ 
+ # generic X tables
+ obj-$(CONFIG_NETFILTER_XTABLES) += x_tables.o xt_tcpudp.o
+diff --git a/net/netfilter/nf_flow_table_core.c b/net/netfilter/nf_flow_table_core.c
+index 1036558..a0f52f6 100644
+--- a/net/netfilter/nf_flow_table_core.c
++++ b/net/netfilter/nf_flow_table_core.c
+@@ -373,6 +373,29 @@ void flow_offload_teardown(struct flow_offload *flow)
+ }
+ EXPORT_SYMBOL_GPL(flow_offload_teardown);
+ 
++void flow_offload_teardown_by_tuple(struct flow_offload_tuple *tuple)
++{
++	struct net_device *netdev;
++	struct nf_flowtable *flowtable;
++	struct flow_offload_tuple_rhash *tuplehash;
++	struct flow_offload *flow;
++	int dir;
++
++	list_for_each_entry(flowtable, &flowtables, list) {
++		for_each_netdev(&init_net, netdev) {
++			tuple->iifidx = netdev->ifindex;
++			tuplehash = flow_offload_lookup(flowtable, tuple);
++			if (!tuplehash)
++				continue;
++
++			dir = tuplehash->tuple.dir;
++			flow = container_of(tuplehash, struct flow_offload, tuplehash[dir]);
++			flow_offload_teardown(flow);
++		}
++	};
++}
++EXPORT_SYMBOL_GPL(flow_offload_teardown_by_tuple);
++
+ struct flow_offload_tuple_rhash *
+ flow_offload_lookup(struct nf_flowtable *flow_table,
+ 		    struct flow_offload_tuple *tuple)
+diff --git a/net/netfilter/nf_flow_table_netlink.c b/net/netfilter/nf_flow_table_netlink.c
+new file mode 100644
+index 0000000..f05f29e
+--- /dev/null
++++ b/net/netfilter/nf_flow_table_netlink.c
+@@ -0,0 +1,239 @@
++#include <linux/types.h>
++#include <linux/kernel.h>
++#include <linux/init.h>
++#include <linux/module.h>
++#include <linux/netfilter.h>
++#include <linux/netlink.h>
++#include <net/netlink.h>
++#include <net/ip.h>
++#include <linux/netfilter/nfnetlink.h>
++#include <net/netfilter/nf_flow_table.h>
++
++enum ft_netlink_msg_types {
++	FT_MSG_DEL,
++	FT_MSG_ADD,
++	FT_MSG_FLUSH,
++	FT_MSG_MAX
++};
++
++enum ftattr_type {
++	FTA_UNSPEC,
++	FTA_TUPLE,
++	__FTA_MAX
++};
++#define FTA_MAX (__FTA_MAX - 1)
++
++enum ftattr_tuple {
++	FTA_TUPLE_UNSPEC,
++	FTA_TUPLE_IP,
++	FTA_TUPLE_PROTO,
++	FTA_TUPLE_ZONE,
++	__FTA_TUPLE_MAX
++};
++#define FTA_TUPLE_MAX (__FTA_TUPLE_MAX - 1)
++
++enum ftattr_ip {
++	FTA_IP_UNSPEC,
++	FTA_IP_V4_SRC,
++	FTA_IP_V4_DST,
++	__FTA_IP_MAX
++};
++#define FTA_IP_MAX (__FTA_IP_MAX - 1)
++
++enum ftattr_l4proto {
++	FTA_PROTO_UNSPEC,
++	FTA_PROTO_NUM,
++	FTA_PROTO_SPORT,
++	FTA_PROTO_DPORT,
++	__FTA_PROTO_MAX
++};
++#define FTA_PROTO_MAX (__FTA_PROTO_MAX - 1)
++
++static const struct nla_policy tuple_nla_policy[FTA_TUPLE_MAX + 1] = {
++	[FTA_TUPLE_IP]		= { .type = NLA_NESTED },
++	[FTA_TUPLE_PROTO]	= { .type = NLA_NESTED },
++	[FTA_TUPLE_ZONE]	= { .type = NLA_U16 },
++};
++
++static const struct nla_policy ip_nla_policy[FTA_IP_MAX + 1] = {
++	[FTA_IP_V4_SRC]		= { .type = NLA_U32 },
++	[FTA_IP_V4_DST]		= { .type = NLA_U32 },
++};
++
++static const struct nla_policy l4proto_nla_policy[FTA_PROTO_MAX + 1] = {
++	[FTA_PROTO_NUM]		= { .type = NLA_U8 },
++	[FTA_PROTO_SPORT]	= {.type = NLA_U16},
++	[FTA_PROTO_DPORT]	= {.type = NLA_U16},
++};
++
++static inline int ftnetlink_parse_tuple_ip(struct nlattr *attr,
++					   struct flow_offload_tuple *tuple)
++{
++	struct nlattr *tb[FTA_IP_MAX+1];
++	int err;
++
++	err = nla_parse_nested_deprecated(tb, FTA_IP_MAX, attr, ip_nla_policy, NULL);
++
++	if (err < 0)
++		return err;
++
++	switch (tuple->l3proto) {
++	case NFPROTO_IPV4:
++		if (!tb[FTA_IP_V4_SRC] || !tb[FTA_IP_V4_DST])
++			return -EINVAL;
++
++		tuple->src_v4.s_addr = nla_get_in_addr(tb[FTA_IP_V4_SRC]);
++		tuple->dst_v4.s_addr = nla_get_in_addr(tb[FTA_IP_V4_DST]);
++	}
++
++	return err;
++}
++
++static inline int ftnetlink_parse_tuple_proto(struct nlattr *attr,
++					      struct flow_offload_tuple *tuple)
++{
++	struct nlattr *tb[FTA_PROTO_MAX+1];
++	int err;
++
++	err = nla_parse_nested_deprecated(tb, FTA_PROTO_MAX, attr, l4proto_nla_policy, NULL);
++
++	if(err < 0)
++		return err;
++
++	if (!tb[FTA_PROTO_NUM] || !tb[FTA_PROTO_SPORT] || !tb[FTA_PROTO_DPORT])
++		return -EINVAL;
++
++	tuple->l4proto = nla_get_u8(tb[FTA_PROTO_NUM]);
++	tuple->src_port = nla_get_u16(tb[FTA_PROTO_SPORT]);
++	tuple->dst_port = nla_get_u16(tb[FTA_PROTO_DPORT]);
++
++	return err;
++}
++
++static int ftnetlink_parse_tuple(const struct nlattr * const cda[],
++				 struct flow_offload_tuple *tuple,
++				 int attrtype, int l3proto)
++{
++	struct nlattr *tb[FTA_TUPLE_MAX+1];
++	int err;
++
++	memset(tuple, 0, sizeof(*tuple));
++
++	err = nla_parse_nested_deprecated(tb, FTA_TUPLE_MAX, cda[attrtype], tuple_nla_policy, NULL);
++	if (err < 0)
++		return err;
++
++	if (!tb[FTA_TUPLE_IP])
++		return -EINVAL;
++
++	/* parse IP */
++	tuple->l3proto = l3proto;
++	err = ftnetlink_parse_tuple_ip(tb[FTA_TUPLE_IP], tuple);
++	if (err < 0)
++		return err;
++
++	/* parse proto */
++	if (!tb[FTA_TUPLE_PROTO])
++		return -EINVAL;
++	err = ftnetlink_parse_tuple_proto(tb[FTA_TUPLE_PROTO], tuple);
++
++	if (err >= 0)
++		printk("tuple info:sip=%pI4,dip=%pI4 proto=%d "
++		       "sport=%d dport=%d\n",
++		       &tuple->src_v4, &tuple->dst_v4, tuple->l4proto,
++		       ntohs(tuple->src_port), ntohs(tuple->dst_port));
++
++	return err;
++}
++
++static int ftnetlink_del_nf_flow(struct net *net, struct sock *ftnl, struct sk_buff *skb,
++				 const struct nlmsghdr *nlh,
++				 const struct nlattr * const cda[],
++				 struct netlink_ext_ack *extack)
++{
++	struct net_device *dev = skb->dev;
++	struct flow_offload_tuple tuple;
++	int err = -1;
++	struct nfgenmsg *nfmsg = nlmsg_data(nlh);
++	u_int8_t u3 = nfmsg->nfgen_family;
++
++	/* parse tuple */
++	if(!cda[FTA_TUPLE])
++		return -EINVAL;
++
++	err = ftnetlink_parse_tuple(cda, &tuple, FTA_TUPLE, u3);
++	if (err < 0)
++		return err;
++
++	/* teardown the flow */
++	flow_offload_teardown_by_tuple(&tuple);
++
++	return 0;
++}
++
++static int ftnetlink_add_nf_flow(struct net *net, struct sock *ftnl, struct sk_buff *skb,
++				 const struct nlmsghdr *nlh,
++				 const struct nlattr * const cda[],
++				 struct netlink_ext_ack *extack)
++{
++	return 0;
++}
++
++static int ftnetlink_flush_table(struct net *net, struct sock *ftnl, struct sk_buff *skb,
++				 const struct nlmsghdr *nlh,
++				 const struct nlattr * const cda[],
++				 struct netlink_ext_ack *extack)
++{
++	struct net_device *dev = skb->dev;
++
++	nf_flow_table_cleanup(dev);
++
++	return 0;
++}
++
++static const struct nla_policy ft_nla_policy[FTA_MAX + 1] = {
++	[FTA_TUPLE] = { .type = NLA_NESTED },
++};
++
++static const struct nfnl_callback flow_table_cb[FT_MSG_MAX] = {
++	[FT_MSG_DEL] = {
++		.call = ftnetlink_del_nf_flow,
++		.attr_count = FTA_MAX,
++		.policy = ft_nla_policy
++	},
++	[FT_MSG_ADD] = {
++		.call = ftnetlink_add_nf_flow,
++		.attr_count = FTA_MAX,
++		.policy = ft_nla_policy
++	},
++	[FT_MSG_FLUSH] = {
++		.call = ftnetlink_flush_table,
++		.attr_count = FTA_MAX,
++		.policy = ft_nla_policy
++	},
++};
++
++static const struct nfnetlink_subsystem ftnl_subsys = {
++	.name = "flowtable",
++	.subsys_id = NFNL_SUBSYS_FLOWTABLE,
++	.cb_count = FT_MSG_MAX,
++	.cb = flow_table_cb,
++};
++
++static int __init ftnetlink_init(void)
++{
++	int ret;
++
++	ret = nfnetlink_subsys_register(&ftnl_subsys);
++
++	return ret;
++}
++
++static void ftnetlink_exit(void)
++{
++	nfnetlink_subsys_unregister(&ftnl_subsys);
++}
++
++MODULE_LICENSE("GPL");
++module_init(ftnetlink_init);
++module_exit(ftnetlink_exit);