#!/usr/bin/utpl -S

{%-
/*
 * SPDX-License-Identifier: GPL-2.0-only
 *
 * Copyright (C) 2025 ImmortalWrt.org
 *
 * Declares every homeproxy_* fw4 chain/set. The inventory of those objects is
 * tracked in scripts/fw4_names.sh, which init.d/homeproxy-pro uses to clean them up
 * on stop; add/remove entries there together with any change below.
 * tests/ucode/test_fw4_names.sh compares both lists, and
 * tests/ucode/test_firewall_template.sh renders this template and checks the
 * objects actually survive into the generated nftables script.
 *
 * Every UCI-derived value (IPv4, MAC, interface name, port) goes through
 * one of the *_to_nftarr() helpers in firewall_utils.uc - not because the
 * UCI writers are untrusted (UI validation is there), but because UCI is
 * writable from anywhere on the LAN and the package principle is "backend
 * must enforce".  Why those helpers exist, and why dropping silently
 * matches the IPv6 path, is pinned by tests/ucode/test_firewall_validators.uc
 * and guard 11 in tests/arch-guard.sh.
 *
 * Keep this comment inside the ucode block: text placed before `{%-` has its
 * trailing newline trimmed, which would glue it onto the first nft statement.
 */
import { readfile } from 'fs';
import { cursor } from 'uci';
import { isEmpty, isValidCIDR, udp_transport_verdict } from '/etc/homeproxy-pro/scripts/homeproxy-pro.uc';
import {
	ipv4_to_nftarr,
	mac_to_nftarr,
	iface_to_nftarr,
	ports_to_nftarr,
	isValidPort,
	isValidIface
} from '/etc/homeproxy-pro/scripts/firewall_utils.uc';

const fw4 = require('fw4');

function array_to_nftarr(array) {
	if (type(array) !== 'array')
		return null;

	return `{ ${join(', ', uniq(array))} }`;
}

function resolve_ipv6(str) {
	if (isEmpty(str))
		return null;

	let ipv6 = fw4.parse_subnet(str)?.[0];
	if (!ipv6 || ipv6.family !== 6)
		return null;

	if (ipv6.bits > -1)
		return `${ipv6.addr}/${ipv6.bits}`;
	else
		return ipv6.addr;
}

/* The node server addresses the generator exported (generate_client.uc's
 * export_node_addresses()), as an nftables anonymous set - or null when there
 * is nothing to protect.
 *
 * Only the literal-address form is rendered here.  A node configured with a
 * host name reaches the same set at runtime: the dnsmasq snippet runtime/dns.sh
 * writes resolves the name and back-fills the set through `nftset=`, so one
 * mechanism covers both without this template needing a resolver of its own.
 * A literal address has no name to resolve, so it can only come from here.
 *
 * readfile() rather than a UCI read on purpose: the generator is the only
 * place that knows which nodes are actually in use (main_node, main_udp_node,
 * urltest membership, custom-mode routing_nodes, wireguard endpoints), and a
 * copy of that selection in this template is a copy that can drift.  A missing
 * file renders null, which is the behaviour before this existed. */
function node_addr_to_nftarr(run_dir, family) {
	let raw = readfile(run_dir + '/node-addr-ips.txt');
	if (isEmpty(raw))
		return null;

	let out = [];
	for (let entry in split(trim(raw), /[\r\n]/)) {
		let parsed = fw4.parse_subnet(entry)?.[0];
		if (!parsed || parsed.family !== family)
			continue;
		push(out, (parsed.bits > -1) ? `${parsed.addr}/${parsed.bits}` : parsed.addr);
	}

	return isEmpty(out) ? null : array_to_nftarr(out);
}

/* Whether the node bypass has anything to protect at all.

   Either export file counts.  The domains file is the one that matters most:
   a host-name node - the common case, and the one the device this was written
   for uses - appears only there, and its set has to exist before dnsmasq can
   put anything in it.  Gating on the literal-address file instead is what left
   the whole mechanism doing nothing. */
function node_addr_protected(run_dir) {
	return !isEmpty(readfile(run_dir + '/node-addr-ips.txt'))
		|| !isEmpty(readfile(run_dir + '/node-addr-domains.txt'));
}

/* Normalize a list of IPv6 entries into an nftables anonymous set
   (or null when empty), so IPv6 ACLs match in a single set lookup
   instead of one rule per address. */
function ipv6_to_nftarr(list) {
	if (isEmpty(list))
		return null;

	let out = [];
	for (let ip in list) {
		const r = resolve_ipv6(ip);
		if (!isEmpty(r))
			push(out, r);
	}

	return isEmpty(out) ? null : `{ ${join(', ', out)} }`;
}

function resolve_mark(str) {
	if (isEmpty(str))
		return null;

	let mark = fw4.parse_mark(str);
	if (isEmpty(mark))
		return null;

	if (mark.mask === 0xffffffff)
		return fw4.hex(mark.mark);
	else if (mark.mark === 0)
		return `mark and ${fw4.hex(~mark.mask & 0xffffffff)}`;
	else if (mark.mark === mark.mask)
		return `mark or ${fw4.hex(mark.mark)}`;
	else if (mark.mask === 0)
		return `mark xor ${fw4.hex(mark.mark)}`;
	else
		return `mark and ${fw4.hex(~mark.mask & 0xffffffff)} xor ${fw4.hex(mark.mark)}`;
}

/* Single-value guards for the five fields that were still read straight from
 * UCI and interpolated into the nft text: self_mark, redirect_port,
 * tproxy_port, dns_port and tun_name.  H1 fixed the *_to_nftarr() families but
 * missed these; a ';' in one of them is a statement boundary in nft, and a
 * non-numeric value makes fw4 reject the whole ruleset, which takes the
 * router's firewall down with it.  A rejected value falls back to the built-in
 * default rather than being emitted, so the side keeps working. */
function port_or(str, fallback) {
	return isValidPort(str) ? str : fallback;
}

function iface_or(str, fallback) {
	return isValidIface(str) ? str : fallback;
}

/* self_mark is used as a *match* value (`meta mark <x>`), so it has to be a
 * plain number.  resolve_mark() also returns set-expressions such as
 * `mark and 0xff xor 0x100` for masked input, and those are only valid after
 * `mark set`; anything that is not a bare hex value falls back. */
function mark_value_or(str, fallback) {
	const m = resolve_mark(str);
	return match(m || '', /^0x[0-9a-fA-F]+$/) ? m : fallback;
}

/* gfwlist mode routes by the address set that dnsmasq fills through
 * `nftset=`, and the gates below compare the destination against it.  A dnsmasq
 * built without HAVE_NFTSET never fills the set, and `ip daddr != @<empty set>`
 * is true for every packet - the whole mode then silently routes everything
 * direct while the DNS side keeps answering through sing-box.  init.d records
 * the capability in resources/.dnsmasq-nftset before this template is rendered,
 * so the gates can be omitted there and sing-box decides by geoip instead.
 * A missing file means "capability unknown" and keeps the historical output. */
function dnsmasq_nftset() {
	let marker = null;
	try {
		marker = trim(readfile(resources_dir + '/.dnsmasq-nftset'));
	} catch (e) {
		return true;
	}
	return marker === '' || marker === '1';
}

/* Misc config */
const resources_dir = '/etc/homeproxy-pro/resources';
const run_dir = '/var/run/homeproxy-pro';

/* Resolved here, in the ucode block, rather than with `{% set %}` in the
 * template body below: utpl's `set` tag takes a plain expression and rejects a
 * call outright - `{% set x = f(); %}` is a parse error ("Unexpected token,
 * Expecting ';'").  A parse error kills the whole render, fw4_post.nft comes
 * out empty, and the health gate silently keeps the previous ruleset, so a
 * template that fails this way does not look broken at all.  r41 shipped
 * `{% set node_addr_v4 = node_addr_to_nftarr(4); %}` and never rendered once.
 *
 * Both helpers take run_dir as a parameter rather than closing over it.  In
 * this ucode a closure captures the block variables that already exist where
 * the function is DEFINED, not where it is called: a function defined above
 * `const run_dir` cannot see run_dir even when it is called far below, and
 * the error is "Reference error: access to undeclared variable run_dir" -
 * which reads as though run_dir were missing, when it is in fact declared 80
 * lines above the call.  Passing it in is the only spelling that works. */
const node_protect = node_addr_protected(run_dir);
const node_addr_v4 = node_addr_to_nftarr(run_dir, 4);
const node_addr_v6 = node_addr_to_nftarr(run_dir, 6);

/* UCI config start */
const cfgname = 'homeproxy-pro';
const uci = cursor();
uci.load(cfgname);

const routing_mode = uci.get(cfgname, 'config', 'routing_mode') || 'bypass_mainland_china';
let outbound_node, outbound_udp_node, china_dns_server, bypass_cn_traffic;

if (routing_mode !== 'custom') {
	outbound_node = uci.get(cfgname, 'config', 'main_node') || 'nil';
	outbound_udp_node = uci.get(cfgname, 'config', 'main_udp_node') || 'nil';
	china_dns_server = uci.get(cfgname, 'config', 'china_dns_server');
} else {
	outbound_node = uci.get(cfgname, 'routing', 'default_outbound') || 'nil';
	bypass_cn_traffic = uci.get(cfgname, 'routing', 'bypass_cn_traffic') || '0';
}

let routing_port = uci.get(cfgname, 'config', 'routing_port');
if (routing_port === 'common')
	routing_port = uci.get(cfgname, 'infra', 'common_port') || '22,53,80,143,443,465,587,853,873,993,995,8080,8443,9418';

const proxy_mode = uci.get(cfgname, 'config', 'proxy_mode') || 'redirect_tproxy',
      ipv6_support = uci.get(cfgname, 'config', 'ipv6_support') || '0';

/* --- can IPv6 be classified as mainland at all? ------------------------
 *
 * Every IPv6 decision in this template used to hang off ipv6_support
 * alone.  That flag only says whether the user *wants* IPv6 handled; it
 * says nothing about whether we can tell a mainland IPv6 destination from
 * a foreign one.  That test is the homeproxy_mainland_addr_v6 set, and the
 * set is filled straight from resources/china_ip6.txt - so an install whose
 * list is missing, empty or entirely malformed produced a *syntactically
 * valid but permanently empty* set.  `ip6 daddr @homeproxy_mainland_addr_v6
 * counter return` then matched nothing, and every mainland IPv6 connection
 * fell through to the proxy hop at the bottom of the chain: a silent,
 * unlogged inversion of the mode's promise, and the reason a user who
 * enables IPv6 finds Chinese sites taking the long way round.
 *
 * nft happily accepts `elements = { }`, so nothing downstream could notice.
 * The count is taken here, once, with the same isValidCIDR() the set
 * rendering uses - a list of entries this function rejects would render an
 * empty set too, so counting something else would not be the same test.
 *
 * v6_handled is what every v6 branch below now keys off.  When the list is
 * unusable it is false, and the ruleset degrades to exactly the IPv6-off
 * shape: IPv6 is not intercepted, not marked, not redirected.  That is a
 * deliberate choice of failure direction.  The alternative - keep
 * intercepting and proxy everything - trades a wrong-but-working path for
 * a leaked one, and the user cannot see either from the client.  Passing
 * IPv6 through unproxied is the state the router was in before this package
 * touched it, it is recoverable (fix the list, reload), and it is announced:
 * see the comment on the dstnat jump below and the warning
 * hp_prepare_runtime_files() logs on every start. */
let cn_ipv6_count = 0;
for (let entry in split(trim(readfile(resources_dir + '/china_ip6.txt')), /[\r\n]/))
	if (isValidCIDR(entry, 6))
		cn_ipv6_count++;

const cn_ipv6_ready = (cn_ipv6_count > 0);
const v6_handled = (ipv6_support === '1') && cn_ipv6_ready;

/* The degraded-state warning, as a ready-made nft comment suffix.
 *
 * A real `comment` rather than a `#` line on purpose: fw4 keeps `#` lines
 * only in the generated file, while a rule comment is part of the rule and
 * survives into `nft list ruleset` - which is where someone debugging "why
 * is my IPv6 not going through the proxy" actually looks.
 *
 * Computed once and interpolated into all three jump rules rather than
 * wrapped around each of them: the rule text is identical either way, only
 * the comment differs, and one string is one place to change if the wording
 * ever has to. */
const v6_warn_comment = ((ipv6_support === '1') && !cn_ipv6_ready)
	? ' comment "!homeproxy-pro: WARNING china_ip6.txt has 0 usable prefixes - IPv6 is NOT proxied, run update_resources.sh china_ip6"'
	: '';

let self_mark, redirect_port,
    tproxy_port, tproxy_mark,
    tun_name, tun_mark, tun_self_mark;

if (match(proxy_mode, /redirect/)) {
	self_mark = mark_value_or(uci.get(cfgname, 'infra', 'self_mark'), resolve_mark('100'));
	redirect_port = port_or(uci.get(cfgname, 'infra', 'redirect_port'), '5331');
}
/* Whether QUIC has to be rejected, and why.
 *
 * This used to ask "is there a UDP node?" and that question has been wrong in
 * both directions.
 *
 * Wrong by too much: it keyed off `routing_mode !== 'custom'` alone, so a
 * router with `main_udp_node` set still rejected QUIC on UDP 443 (measured on
 * the device: 1722 QUIC packets rejected in one sample) and browsers that had
 * already learned HTTP/3 fell back to TCP needlessly.
 *
 * Wrong by too little, which is what the current form is: "a UDP node exists"
 * says nothing about what that node's transport is.  `main_udp_node = same`
 * with a TCP-transport main node is the shape that slips through - the UI
 * label reads "Same as main node" and nothing tells the user the consequence.
 * The UDP is proxied, yes, but it is tunnelled over TCP, and QUIC over a TCP
 * tunnel stalls: measured with both nodes on the SAME server and only the
 * transport differing (anytls TCP:443 vs hysteria2 QUIC/UDP:50466), UDP came
 * back at 174 ms +/- 1 ms through hysteria2 and produced a 568 ms spike with
 * 37 ms jitter and outright loss through anytls.
 *
 * So the gate is now the transport, resolved by udp_transport_verdict() in
 * homeproxy-pro.uc - one definition, shared with the diagnostic report so the log
 * and the rule cannot disagree.
 *
 * NOTE the deliberate asymmetry with the tproxy chain below and in the UDP
 * tproxy block: those still key off the plain "is there a UDP node" test,
 * because they decide whether UDP is PROXIED at all.  This gate decides
 * whether QUIC is WORTH proxying.  A TCP-transport UDP node still proxies
 * games, voice and everything else; only QUIC is turned away, so the browser
 * falls straight back to a TCP path that the same tunnel carries far better. */
const udp_transport = udp_transport_verdict(cfgname, uci);
const udp_quic_rejected = !udp_transport.native;

if (match(proxy_mode, /tproxy/))
	if (outbound_udp_node !== 'nil' || routing_mode === 'custom') {
		tproxy_port = port_or(uci.get(cfgname, 'infra', 'tproxy_port'), '5332');
		tproxy_mark = resolve_mark(uci.get(cfgname, 'infra', 'tproxy_mark') || '101') || resolve_mark('101');
	}
if (match(proxy_mode, /tun/)) {
	tun_name = iface_or(uci.get(cfgname, 'infra', 'tun_name'), 'singtun0');
	tun_mark = resolve_mark(uci.get(cfgname, 'infra', 'tun_mark') || '102') || resolve_mark('102');
	/* The mark sing-box stamps on its own outbound sockets in tun mode
	 * (generator: route.default_mark, same UCI option as self_mark elsewhere).
	 * The TUN output chain has to return on it, otherwise the tunnel captures
	 * sing-box's own dial - including the one to the node - and the only guard
	 * it had was `iifname <tun>`, which cannot match on the output hook. */
	tun_self_mark = mark_value_or(uci.get(cfgname, 'infra', 'self_mark'), resolve_mark('100'));
}

const control_options = [
	"listen_interfaces", "lan_proxy_mode",
	"lan_direct_mac_addrs", "lan_direct_ipv4_ips", "lan_direct_ipv6_ips",
	"lan_proxy_mac_addrs", "lan_proxy_ipv4_ips", "lan_proxy_ipv6_ips",
	"lan_gaming_mode_mac_addrs", "lan_gaming_mode_ipv4_ips", "lan_gaming_mode_ipv6_ips",
	"lan_global_proxy_mac_addrs", "lan_global_proxy_ipv4_ips", "lan_global_proxy_ipv6_ips",
	"wan_proxy_ipv4_ips", "wan_proxy_ipv6_ips",
	"wan_direct_ipv4_ips", "wan_direct_ipv6_ips"
];
const control_info = {};

for (let i in control_options)
	control_info[i] = uci.get(cfgname, 'control', i);

/* Devices of the wan zone, resolved by fw4 itself.
 *
 * The intercept layer must not cover the wan side.  When the user names
 * interfaces the guards below use exactly those; when the option is empty the
 * UI says "all", and "all" used to include wan - so wan-inbound traffic to the
 * router's own address on a routing_port was captured by the redirect / tproxy
 * jump and by the DNS hijack as well.  It happened to be masked on the device
 * (dnsmasq's own dns_redirect suppressed the DNS half, fw4's input policy
 * dropped the rest), but the hole was structural: any wan-side service on one
 * of the routing ports would have been hijacked.  Empty now means "everything
 * except the wan zone".
 *
 * fw4's own ruleset template renders zone devices from `zone.match_devices`,
 * so this asks the same source.  A render outside fw4 (the off-target test
 * harness has no zone state) leaves the list empty and the guards below fall
 * back to the previous behaviour. */
let wan_devices = [];

try {
	/* fw4.load() is what resolves a zone's *logical* networks to the devices
	 * that actually appear in `iifname` - the wan zone is `network wan` but
	 * the device is `pppoe-wan`, and this template runs OUTSIDE fw4's own
	 * process, where the module has no state at all.  Two wrong answers were
	 * measured on the device before this:
	 *
	 *   - no load at all: `zones()` is null, the loop threw, the catch left
	 *     the list empty and the guard silently disappeared from the rendered
	 *     ruleset (that is the state this package shipped in r46);
	 *   - fw4.read_state(): parses /var/run/fw4.state, which carries the
	 *     LOGICAL names ("wan", "wan_6"), so the guard rendered as
	 *     `meta iifname { wan }` and could never match - a guard that looks
	 *     present and does nothing.
	 *
	 * load() builds the model through ubus the same way fw4 itself does, and
	 * yields match_devices = [ "pppoe-wan" ].  It is read-only, ~tens of ms,
	 * and its warnings go to stderr, which the caller discards. */
	fw4.load();

	for (let zone in (fw4.zones() || []))
		if (zone.name === 'wan')
			for (let device in zone.match_devices)
				push(wan_devices, device);
}
catch (e) { }

wan_devices = sort(uniq(wan_devices));

/* Validated, nft-ready form of every UCI list, computed once.
 *
 * The template used to gate on the *raw* UCI value and interpolate the
 * validator-backed helper.  A list that is non-empty but has no usable entry -
 * hand-edited UCI, an address in the wrong family - therefore rendered
 * `ip daddr  counter return`, an nft syntax error that fails the whole fw4
 * transaction, or `elements = {  }`.  Gating on the helper's result instead
 * means an unusable list simply emits no rule.  The rendered output for a
 * usable configuration is unchanged (the helpers already dropped invalid
 * entries one by one). */
const NFTARR_FIELDS = {
	listen_interfaces: iface_to_nftarr,
	lan_proxy_ipv4_ips: ipv4_to_nftarr,
	lan_proxy_ipv6_ips: ipv6_to_nftarr,
	lan_proxy_mac_addrs: mac_to_nftarr,
	lan_direct_ipv4_ips: ipv4_to_nftarr,
	lan_direct_ipv6_ips: ipv6_to_nftarr,
	lan_direct_mac_addrs: mac_to_nftarr,
	lan_gaming_mode_ipv4_ips: ipv4_to_nftarr,
	lan_gaming_mode_ipv6_ips: ipv6_to_nftarr,
	lan_gaming_mode_mac_addrs: mac_to_nftarr,
	lan_global_proxy_ipv4_ips: ipv4_to_nftarr,
	lan_global_proxy_ipv6_ips: ipv6_to_nftarr,
	lan_global_proxy_mac_addrs: mac_to_nftarr,
	wan_proxy_ipv4_ips: ipv4_to_nftarr,
	wan_proxy_ipv6_ips: ipv6_to_nftarr,
	wan_direct_ipv4_ips: ipv4_to_nftarr,
	wan_direct_ipv6_ips: ipv6_to_nftarr
};
const nftarr = {};

for (let field in NFTARR_FIELDS)
	nftarr[field] = NFTARR_FIELDS[field](control_info[field] || []);

/* The local-output chain also exempts `lo`, which the tproxy guard adds by
 * hand.  Same precomputation, so the guard cannot disagree with the list. */
nftarr.listen_interfaces_lo = iface_to_nftarr([ ...(control_info.listen_interfaces || []), 'lo' ]);

/* The routing-port filter.  Gating on the raw option while interpolating
 * ports_to_nftarr() had the same defect, and there the fallback direction
 * matters: an empty rendering would make `tcp dport != @homeproxy_routing_port`
 * match everything and send all TCP traffic direct.  An unusable list
 * therefore disables the filter (ports are proxied) instead of widening it. */
const routing_port_set = routing_port ? ports_to_nftarr(routing_port) : null;

const dns_redirect = uci.get(cfgname, 'infra', 'dns_redirect') || '1';
const dns_hijacked = uci.get('dhcp', '@dnsmasq[0]', 'dns_redirect') || '0',
      /* dnsmasq's own port - NOT the sing-box DNS inbound port (infra.dns_port,
       * 5333).  Both were called `dns_port` here and in the generator, which
       * made the hijack rule look like it pointed at the sing-box listener. */
      dnsmasq_port = port_or(uci.get('dhcp', '@dnsmasq[0]', 'port'), '53');
/* UCI config end */
-%}

{# Reserved addresses -#}
set homeproxy_local_addr_v4 {
	type ipv4_addr
	flags interval
	auto-merge
	elements = {
		0.0.0.0/8,
		10.0.0.0/8,
		100.64.0.0/10,
		127.0.0.0/8,
		169.254.0.0/16,
		172.16.0.0/12,
		192.0.0.0/24,
		192.0.2.0/24,
		192.31.196.0/24,
		192.52.193.0/24,
		192.88.99.0/24,
		192.168.0.0/16,
		192.175.48.0/24,
		198.18.0.0/15,
		198.51.100.0/24,
		203.0.113.0/24,
		224.0.0.0/4,
		240.0.0.0/4
	}
}
{% if (v6_handled): %}
set homeproxy_local_addr_v6 {
	type ipv6_addr
	flags interval
	auto-merge
	elements = {
		::/128,
		::1/128,
		::ffff:0:0/96,
		100::/64,
		64:ff9b::/96,
		2001::/32,
		2001:10::/28,
		2001:20::/28,
		2001:db8::/28,
		2002::/16,
		fc00::/7,
		fe80::/10,
		ff00::/8
	}
}
{% endif %}

{% if (routing_mode === 'gfwlist'): %}
set homeproxy_gfw_list_v4 {
	type ipv4_addr
	flags interval
	auto-merge
}
{% if (v6_handled): %}
set homeproxy_gfw_list_v6 {
	type ipv6_addr
	flags interval
	auto-merge
}
{% endif /* v6_handled */ %}
{% elif (match(routing_mode, /mainland_china/) || bypass_cn_traffic === '1'): %}
set homeproxy_mainland_addr_v4 {
	type ipv4_addr
	flags interval
	auto-merge
	elements = {
		{% for (let cnip4 in split(trim(readfile(resources_dir + '/china_ip4.txt')), /[\r\n]/)): %}
		{% if (isValidCIDR(cnip4, 4)): %}
		{{ cnip4 }},
		{% endif %}
		{% endfor %}
	}
}
{% if (v6_handled): %}
set homeproxy_mainland_addr_v6 {
	type ipv6_addr
	flags interval
	auto-merge
	elements = {
		{% for (let cnip6 in split(trim(readfile(resources_dir + '/china_ip6.txt')), /[\r\n]/)): %}
		{% if (isValidCIDR(cnip6, 6)): %}
		{{ cnip6 }},
		{% endif %}
		{% endfor %}
	}
}
{% endif /* v6_handled */ %}
{% endif /* routing_mode */ %}

{# WAN ACL addresses #}
set homeproxy_wan_proxy_addr_v4 {
	type ipv4_addr
	flags interval
	auto-merge
{% if (nftarr.wan_proxy_ipv4_ips): %}
	elements = { {{ nftarr.wan_proxy_ipv4_ips }} }
{% endif %}
}

{% if (v6_handled): %}
set homeproxy_wan_proxy_addr_v6 {
	type ipv6_addr
	flags interval
	auto-merge
{% if (nftarr.wan_proxy_ipv6_ips): %}
	elements = { {{ nftarr.wan_proxy_ipv6_ips }} }
{% endif /* wan_proxy_ipv6_ips*/ %}
}
{% endif /* v6_handled */ %}

set homeproxy_wan_direct_addr_v4 {
	type ipv4_addr
	flags interval
	auto-merge
{% if (nftarr.wan_direct_ipv4_ips): %}
	elements = { {{ nftarr.wan_direct_ipv4_ips }} }
{% endif %}
}

{% if (v6_handled): %}
set homeproxy_wan_direct_addr_v6 {
	type ipv6_addr
	flags interval
	auto-merge
{% if (nftarr.wan_direct_ipv6_ips): %}
	elements = { {{ nftarr.wan_direct_ipv6_ips }} }
{% endif /* wan_direct_ipv6_ips */ %}
}
{% endif /* v6_handled */ %}

{% if (routing_port_set): %}
set homeproxy_routing_port {
	type inet_service
	flags interval
	auto-merge
	elements = { {{ routing_port_set }} }
}
{% endif %}

{# Node server addresses.
   Declared when the generator exported any node address at all - and NOT
   only when there is a literal address to put in it.

   That distinction is the whole point of the set existing.  A node configured
   with a host name contributes no element here; dnsmasq resolves the name and
   back-fills this set through the nftset= snippet runtime/dns.sh writes.  A
   set that is declared only when it already has elements is therefore never
   declared for a host-name node, the back-fill has nothing to land in, and the
   return rules below - which are what actually exclude the address - are not
   emitted either.  r41 gated both on the literal form and was inert for the
   configuration it was written for.

   An empty set is harmless: nft accepts one with no elements, and the cost is
   one lookup per packet until the first answer back-fills it. #}
{% if (node_protect): %}
set homeproxy_node_addr_v4 {
	type ipv4_addr
	flags interval
	auto-merge
{% if (node_addr_v4): %}
	elements = { {{ node_addr_v4 }} }
{% endif %}
}
{% endif %}
{% if (node_protect && v6_handled): %}
set homeproxy_node_addr_v6 {
	type ipv6_addr
	flags interval
	auto-merge
{% if (node_addr_v6): %}
	elements = { {{ node_addr_v6 }} }
{% endif %}
}
{% endif /* node_addr_v6 */ %}

{# DNS hijack & TCP redirect #}
chain dstnat {
{% if ((dns_redirect === '1') && (dns_hijacked !== '1')): %}
	{% if (nftarr.listen_interfaces): %}
	meta iifname {{ nftarr.listen_interfaces }}
	{%- elif (!isEmpty(wan_devices)): %}
	meta iifname != {{ array_to_nftarr(wan_devices) }}
	{%- endif /* listen_interfaces */ %}
	meta nfproto { ipv4, ipv6 } udp dport 53 counter redirect to :{{ dnsmasq_port }} comment "!{{ cfgname }}: DNS hijack"
{% endif /* dns_hijacked */ %}
{% if (match(proxy_mode, /redirect/)): %}
	meta nfproto { {{ (v6_handled) ? 'ipv4, ipv6' : 'ipv4' }} } meta l4proto tcp jump homeproxy_redirect_lanac{{ v6_warn_comment }}
{% endif /* proxy_mode */ %}
}

{# TCP redirect #}
{% if (match(proxy_mode, /redirect/)): %}
chain homeproxy_redirect_proxy {
	meta l4proto tcp counter redirect to :{{ redirect_port }}
}

chain homeproxy_redirect_proxy_port {
	{% if (routing_port_set): %}
	tcp dport != @homeproxy_routing_port counter return
	{% endif %}
	goto homeproxy_redirect_proxy
}

chain homeproxy_redirect_lanac {
	{% if (nftarr.listen_interfaces): %}
	meta iifname != {{ nftarr.listen_interfaces }} counter return
	{% elif (!isEmpty(wan_devices)): %}
	meta iifname {{ array_to_nftarr(wan_devices) }} counter return comment "!{{ cfgname }}: not the WAN side"
	{% endif %}
	meta mark {{ self_mark }} counter return

	{% if (control_info.lan_proxy_mode === 'listed_only'): %}
	{% if (nftarr.lan_proxy_ipv4_ips): %}
	ip saddr {{ nftarr.lan_proxy_ipv4_ips }} counter goto homeproxy_redirect
	{% endif /* lan_proxy_ipv4_ips */ %}
	{% if (nftarr.lan_proxy_ipv6_ips): %}
	ip6 saddr {{ nftarr.lan_proxy_ipv6_ips }} counter goto homeproxy_redirect
	{% endif /* lan_proxy_ipv6_ips */ %}
	{% if (nftarr.lan_proxy_mac_addrs): %}
	ether saddr {{ nftarr.lan_proxy_mac_addrs }} counter goto homeproxy_redirect
	{% endif /* lan_proxy_mac_addrs */ %}
	{% elif (control_info.lan_proxy_mode === 'except_listed'): %}
	{% if (nftarr.lan_direct_ipv4_ips): %}
	ip saddr {{ nftarr.lan_direct_ipv4_ips }} counter return
	{% endif /* lan_direct_ipv4_ips */ %}
	{% if (nftarr.lan_direct_ipv6_ips): %}
	ip6 saddr {{ nftarr.lan_direct_ipv6_ips }} counter return
	{% endif /* lan_direct_ipv6_ips */ %}
	{% if (nftarr.lan_direct_mac_addrs): %}
	ether saddr {{ nftarr.lan_direct_mac_addrs }} counter return
	{% endif /* lan_direct_mac_addrs */ %}
	{% endif /* lan_proxy_mode */ %}

	{% if (control_info.lan_proxy_mode !== 'listed_only'): %}
	counter goto homeproxy_redirect
	{% endif %}
}

chain homeproxy_redirect {
	meta mark {{ self_mark }} counter return

	{% if (node_protect): %}
	ip daddr @homeproxy_node_addr_v4 counter return comment "!{{ cfgname }}: node address"
	{% endif %}
	{% if (node_protect && v6_handled): %}
	ip6 daddr @homeproxy_node_addr_v6 counter return comment "!{{ cfgname }}: node address"
	{% endif %}

	ip daddr @homeproxy_wan_proxy_addr_v4 counter goto homeproxy_redirect_proxy_port
	{% if (v6_handled): %}
	ip6 daddr @homeproxy_wan_proxy_addr_v6 counter goto homeproxy_redirect_proxy_port
	{% endif %}

	ip daddr @homeproxy_local_addr_v4 counter return
	{% if (v6_handled): %}
	ip6 daddr @homeproxy_local_addr_v6 counter return
	{% endif %}

	{% if (routing_mode !== 'custom'): %}
	{% if (nftarr.lan_global_proxy_ipv4_ips): %}
	ip saddr {{ nftarr.lan_global_proxy_ipv4_ips }} counter goto homeproxy_redirect_proxy_port
	{% endif /* lan_global_proxy_ipv4_ips */ %}
	{% if (nftarr.lan_global_proxy_ipv6_ips): %}
	ip6 saddr {{ nftarr.lan_global_proxy_ipv6_ips }} counter goto homeproxy_redirect_proxy_port
	{% endif /* lan_global_proxy_ipv6_ips */ %}
	{% if (nftarr.lan_global_proxy_mac_addrs): %}
	ether saddr {{ nftarr.lan_global_proxy_mac_addrs }} counter goto homeproxy_redirect_proxy_port
	{% endif /* lan_global_proxy_mac_addrs */ %}
	{% endif /* routing_mode */ %}

	ip daddr @homeproxy_wan_direct_addr_v4 counter return
	{% if (v6_handled): %}
	ip6 daddr @homeproxy_wan_direct_addr_v6 counter return
	{% endif /* v6_handled */ %}

	{# No QUIC reject here: this whole block only renders when UDP is
	   proxyable (see the gate above), so rejecting QUIC on UDP 443 would
	   break HTTP/3 for traffic that can be proxied.  The TUN block below,
	   which renders either way, carries the reject when UDP cannot be
	   proxied. #}
	{% if (routing_mode === 'gfwlist' && dnsmasq_nftset()): %}
	ip daddr != @homeproxy_gfw_list_v4 counter return
	{% if (v6_handled): %}
	ip6 daddr != @homeproxy_gfw_list_v6 counter return
	{% endif /* v6_handled */ %}
	{% elif (routing_mode === 'bypass_mainland_china' || bypass_cn_traffic === '1'): %}
	ip daddr @homeproxy_mainland_addr_v4 counter return
	{% if (v6_handled): %}
	ip6 daddr @homeproxy_mainland_addr_v6 counter return
	{% endif /* v6_handled */ %}
	{% elif (routing_mode === 'proxy_mainland_china'): %}
	ip daddr != @homeproxy_mainland_addr_v4 counter return
	{% if (v6_handled): %}
	ip6 daddr != @homeproxy_mainland_addr_v6 counter return
	{% endif /* v6_handled */ %}
	{% endif /* routing_mode */ %}

	{% if (nftarr.lan_gaming_mode_ipv4_ips): %}
	ip saddr {{ nftarr.lan_gaming_mode_ipv4_ips }} counter goto homeproxy_redirect_proxy
	{% endif /* lan_gaming_mode_ipv4_ips */ %}
	{% if (nftarr.lan_gaming_mode_ipv6_ips): %}
	ip6 saddr {{ nftarr.lan_gaming_mode_ipv6_ips }} counter goto homeproxy_redirect_proxy
	{% endif /* lan_gaming_mode_ipv6_ips */ %}
	{% if (nftarr.lan_gaming_mode_mac_addrs): %}
	ether saddr {{ nftarr.lan_gaming_mode_mac_addrs }} counter goto homeproxy_redirect_proxy
	{% endif /* lan_gaming_mode_mac_addrs */ %}

	counter goto homeproxy_redirect_proxy_port
}

chain homeproxy_output_redir {
	type nat hook output priority filter -105; policy accept
	meta nfproto { {{ (v6_handled) ? 'ipv4, ipv6' : 'ipv4' }} } meta l4proto tcp jump homeproxy_redirect
}
{% endif %}

{# UDP tproxy #}
{% if (match(proxy_mode, /tproxy/) && (outbound_udp_node !== 'nil' || routing_mode === 'custom')): %}
chain homeproxy_mangle_tproxy {
	meta l4proto udp meta mark set {{ tproxy_mark }} tproxy ip to 127.0.0.1:{{ tproxy_port }} counter accept
	{% if (v6_handled): %}
	meta l4proto udp meta mark set {{ tproxy_mark }} tproxy ip6 to [::1]:{{ tproxy_port }} counter accept
	{% endif %}
}

chain homeproxy_mangle_tproxy_port {
	{% if (routing_port_set): %}
	udp dport != @homeproxy_routing_port counter return
	{% endif %}
	goto homeproxy_mangle_tproxy
}

chain homeproxy_mangle_mark {
	{% if (routing_port_set): %}
	udp dport != @homeproxy_routing_port counter return
	{% endif %}
	meta l4proto udp meta mark set {{ tproxy_mark }} counter accept
}

chain homeproxy_mangle_lanac {
	{% if (nftarr.listen_interfaces): %}
	meta iifname != {{ nftarr.listen_interfaces_lo }} counter return
	{% elif (!isEmpty(wan_devices)): %}
	meta iifname {{ array_to_nftarr(wan_devices) }} counter return comment "!{{ cfgname }}: not the WAN side"
	{% endif %}
	meta iifname != lo udp dport 53 counter return
	meta mark {{ self_mark }} counter return

	{% if (control_info.lan_proxy_mode === 'listed_only'): %}
	{% if (nftarr.lan_proxy_ipv4_ips): %}
	ip saddr {{ nftarr.lan_proxy_ipv4_ips }} counter goto homeproxy_mangle_prerouting
	{% endif /* lan_proxy_ipv4_ips */ %}
	{% if (nftarr.lan_proxy_ipv6_ips): %}
	ip6 saddr {{ nftarr.lan_proxy_ipv6_ips }} counter goto homeproxy_mangle_prerouting
	{% endif /* lan_proxy_ipv6_ips */ %}
	{% if (nftarr.lan_proxy_mac_addrs): %}
	ether saddr {{ nftarr.lan_proxy_mac_addrs }} counter goto homeproxy_mangle_prerouting
	{% endif /* lan_proxy_mac_addrs */ %}
	{% elif (control_info.lan_proxy_mode === 'except_listed'): %}
	{% if (nftarr.lan_direct_ipv4_ips): %}
	ip saddr {{ nftarr.lan_direct_ipv4_ips }} counter return
	{% endif /* lan_direct_ipv4_ips */ %}
	{% if (nftarr.lan_direct_ipv6_ips): %}
	ip6 saddr {{ nftarr.lan_direct_ipv6_ips }} counter return
	{% endif /* lan_direct_ipv6_ips */ %}
	{% if (nftarr.lan_direct_mac_addrs): %}
	ether saddr {{ nftarr.lan_direct_mac_addrs }} counter return
	{% endif /* lan_direct_mac_addrs */ %}
	{% endif /* lan_proxy_mode */ %}

	{% if (control_info.lan_proxy_mode !== 'listed_only'): %}
	counter goto homeproxy_mangle_prerouting
	{% endif %}
}

chain homeproxy_mangle_prerouting {
	{% if (node_protect): %}
	ip daddr @homeproxy_node_addr_v4 counter return comment "!{{ cfgname }}: node address"
	{% endif %}
	{% if (node_protect && v6_handled): %}
	ip6 daddr @homeproxy_node_addr_v6 counter return comment "!{{ cfgname }}: node address"
	{% endif %}

	ip daddr @homeproxy_wan_proxy_addr_v4 counter goto homeproxy_mangle_tproxy_port
	{% if (v6_handled): %}
	ip6 daddr @homeproxy_wan_proxy_addr_v6 counter goto homeproxy_mangle_tproxy_port
	{% endif %}

	ip daddr @homeproxy_local_addr_v4 counter return
	{% if (v6_handled): %}
	ip6 daddr @homeproxy_local_addr_v6 counter return
	{% endif %}

	{% if (routing_mode !== 'custom'): %}
	{% if (nftarr.lan_global_proxy_ipv4_ips): %}
	ip saddr {{ nftarr.lan_global_proxy_ipv4_ips }} counter goto homeproxy_mangle_tproxy_port
	{% endif /* lan_global_proxy_ipv4_ips */ %}
	{% if (nftarr.lan_global_proxy_ipv6_ips): %}
	ip6 saddr {{ nftarr.lan_global_proxy_ipv6_ips }} counter goto homeproxy_mangle_tproxy_port
	{% endif /* lan_global_proxy_ipv6_ips */ %}
	{% if (nftarr.lan_global_proxy_mac_addrs): %}
	ether saddr {{ nftarr.lan_global_proxy_mac_addrs }} counter goto homeproxy_mangle_tproxy_port
	{% endif /* lan_global_proxy_mac_addrs */ %}
	{% endif /* routing_mode */ %}

	ip daddr @homeproxy_wan_direct_addr_v4 counter return
	{% if (v6_handled): %}
	ip6 daddr @homeproxy_wan_direct_addr_v6 counter return
	{% endif /* v6_handled */ %}

	{% if (routing_mode === 'gfwlist' && dnsmasq_nftset()): %}
	ip daddr != @homeproxy_gfw_list_v4 counter return
	{% if (v6_handled): %}
	ip6 daddr != @homeproxy_gfw_list_v6 counter return
	{% endif /* v6_handled */ %}
	{% elif (routing_mode === 'bypass_mainland_china' || bypass_cn_traffic === '1'): %}
	ip daddr @homeproxy_mainland_addr_v4 counter return
	{% if (v6_handled): %}
	ip6 daddr @homeproxy_mainland_addr_v6 counter return
	{% endif /* v6_handled */ %}
	{% elif (routing_mode === 'proxy_mainland_china'): %}
	ip daddr != @homeproxy_mainland_addr_v4 counter return
	{% if (v6_handled): %}
	ip6 daddr != @homeproxy_mainland_addr_v6 counter return
	{% endif /* v6_handled */ %}
	{% endif /* routing_mode */ %}

	{% if (nftarr.lan_gaming_mode_ipv4_ips): %}
	ip saddr {{ nftarr.lan_gaming_mode_ipv4_ips }} counter goto homeproxy_mangle_tproxy
	{% endif /* lan_gaming_mode_ipv4_ips */ %}
	{% if (nftarr.lan_gaming_mode_ipv6_ips): %}
	ip6 saddr {{ nftarr.lan_gaming_mode_ipv6_ips }} counter goto homeproxy_mangle_tproxy
	{% endif /* lan_gaming_mode_ipv6_ips */ %}
	{% if (nftarr.lan_gaming_mode_mac_addrs): %}
	ether saddr {{ nftarr.lan_gaming_mode_mac_addrs }} counter goto homeproxy_mangle_tproxy
	{% endif /* lan_gaming_mode_mac_addrs */ %}

	counter goto homeproxy_mangle_tproxy_port
}

chain homeproxy_mangle_output {
	meta mark {{ self_mark }} counter return

	{% if (node_protect): %}
	ip daddr @homeproxy_node_addr_v4 counter return comment "!{{ cfgname }}: node address"
	{% endif %}
	{% if (node_protect && v6_handled): %}
	ip6 daddr @homeproxy_node_addr_v6 counter return comment "!{{ cfgname }}: node address"
	{% endif %}

	ip daddr @homeproxy_wan_proxy_addr_v4 counter goto homeproxy_mangle_mark
	{% if (v6_handled): %}
	ip6 daddr @homeproxy_wan_proxy_addr_v6 counter goto homeproxy_mangle_mark
	{% endif %}

	ip daddr @homeproxy_local_addr_v4 counter return
	{% if (v6_handled): %}
	ip6 daddr @homeproxy_local_addr_v6 counter return
	{% endif %}

	ip daddr @homeproxy_wan_direct_addr_v4 counter return
	{% if (v6_handled): %}
	ip6 daddr @homeproxy_wan_direct_addr_v6 counter return
	{% endif /* v6_handled */ %}

	{% if (routing_mode === 'gfwlist' && dnsmasq_nftset()): %}
	ip daddr != @homeproxy_gfw_list_v4 counter return
	{% if (v6_handled): %}
	ip6 daddr != @homeproxy_gfw_list_v6 counter return
	{% endif /* v6_handled */ %}
	{% elif (routing_mode === 'bypass_mainland_china' || bypass_cn_traffic === '1'): %}
	ip daddr @homeproxy_mainland_addr_v4 counter return
	{% if (v6_handled): %}
	ip6 daddr @homeproxy_mainland_addr_v6 counter return
	{% endif /* v6_handled */ %}
	{% elif (routing_mode === 'proxy_mainland_china'): %}
	ip daddr != @homeproxy_mainland_addr_v4 counter return
	{% if (v6_handled): %}
	ip6 daddr != @homeproxy_mainland_addr_v6 counter return
	{% endif /* v6_handled */ %}
	{% endif /* routing_mode */ %}

	counter goto homeproxy_mangle_mark
}

chain mangle_prerouting {
	meta nfproto { {{ (v6_handled) ? 'ipv4, ipv6' : 'ipv4' }} } meta l4proto udp jump homeproxy_mangle_lanac{{ v6_warn_comment }}
}

chain mangle_output {
	meta nfproto { {{ (v6_handled) ? 'ipv4, ipv6' : 'ipv4' }} } meta l4proto udp jump homeproxy_mangle_output
}
{% endif %}

{# TUN #}
{% if (match(proxy_mode, /tun/)): %}
chain homeproxy_mangle_lanac {
	iifname {{ tun_name }} counter return
	udp dport 53 counter return

	{% if (nftarr.listen_interfaces): %}
	meta iifname != {{ nftarr.listen_interfaces }} counter return
	{% elif (!isEmpty(wan_devices)): %}
	meta iifname {{ array_to_nftarr(wan_devices) }} counter return comment "!{{ cfgname }}: not the WAN side"
	{% endif %}

	{% if (control_info.lan_proxy_mode === 'listed_only'): %}
	{% if (nftarr.lan_proxy_ipv4_ips): %}
	ip saddr {{ nftarr.lan_proxy_ipv4_ips }} counter goto homeproxy_mangle_tun
	{% endif /* lan_proxy_ipv4_ips */ %}
	{% if (nftarr.lan_proxy_ipv6_ips): %}
	ip6 saddr {{ nftarr.lan_proxy_ipv6_ips }} counter goto homeproxy_mangle_tun
	{% endif /* lan_proxy_ipv6_ips */ %}
	{% if (nftarr.lan_proxy_mac_addrs): %}
	ether saddr {{ nftarr.lan_proxy_mac_addrs }} counter goto homeproxy_mangle_tun
	{% endif /* lan_proxy_mac_addrs */ %}
	{% elif (control_info.lan_proxy_mode === 'except_listed'): %}
	{% if (nftarr.lan_direct_ipv4_ips): %}
	ip saddr {{ nftarr.lan_direct_ipv4_ips }} counter return
	{% endif /* lan_direct_ipv4_ips */ %}
	{% if (nftarr.lan_direct_ipv6_ips): %}
	ip6 saddr {{ nftarr.lan_direct_ipv6_ips }} counter return
	{% endif /* lan_direct_ipv6_ips */ %}
	{% if (nftarr.lan_direct_mac_addrs): %}
	ether saddr {{ nftarr.lan_direct_mac_addrs }} counter return
	{% endif /* lan_direct_mac_addrs */ %}
	{% endif /* lan_proxy_mode */ %}

	{% if (control_info.lan_proxy_mode !== 'listed_only'): %}
	counter goto homeproxy_mangle_tun
	{% endif %}
}

chain homeproxy_mangle_tun_mark {
	{% if (routing_port_set): %}
	{% if (proxy_mode === 'tun'): %}
	tcp dport != @homeproxy_routing_port counter return
	{% endif /* proxy_mode */ %}
	udp dport != @homeproxy_routing_port counter return
	{% endif /* routing_port */ %}

	counter meta mark set {{ tun_mark }}
}

chain homeproxy_mangle_tun {
	iifname {{ tun_name }} counter return
	{% if (tun_self_mark): %}
	meta mark {{ tun_self_mark }} counter return comment "!{{ cfgname }}: sing-box's own traffic"
	{% endif %}

	{% if (node_protect): %}
	ip daddr @homeproxy_node_addr_v4 counter return comment "!{{ cfgname }}: node address"
	{% endif %}
	{% if (node_protect && v6_handled): %}
	ip6 daddr @homeproxy_node_addr_v6 counter return comment "!{{ cfgname }}: node address"
	{% endif %}

	ip daddr @homeproxy_wan_proxy_addr_v4 counter goto homeproxy_mangle_tun_mark
	{% if (v6_handled): %}
	ip6 daddr @homeproxy_wan_proxy_addr_v6 counter goto homeproxy_mangle_tun_mark
	{% endif %}

	ip daddr @homeproxy_local_addr_v4 counter return
	{% if (v6_handled): %}
	ip6 daddr @homeproxy_local_addr_v6 counter return
	{% endif %}

	{% if (routing_mode !== 'custom'): %}
	{% if (nftarr.lan_global_proxy_ipv4_ips): %}
	ip saddr {{ nftarr.lan_global_proxy_ipv4_ips }} counter goto homeproxy_mangle_tun_mark
	{% endif /* lan_global_proxy_ipv4_ips */ %}
	{% if (nftarr.lan_global_proxy_ipv6_ips): %}
	ip6 saddr {{ nftarr.lan_global_proxy_ipv6_ips }} counter goto homeproxy_mangle_tun_mark
	{% endif /* lan_global_proxy_ipv6_ips */ %}
	{% if (nftarr.lan_global_proxy_mac_addrs): %}
	ether saddr {{ nftarr.lan_global_proxy_mac_addrs }} counter goto homeproxy_mangle_tun_mark
	{% endif /* lan_global_proxy_mac_addrs */ %}
	{% endif /* routing_mode */ %}

	{% if (nftarr.wan_direct_ipv4_ips): %}
	ip daddr {{ nftarr.wan_direct_ipv4_ips }} counter return
	{% endif /* wan_direct_ipv4_ips */ %}
	{% if (nftarr.wan_direct_ipv6_ips): %}
	ip6 daddr {{ nftarr.wan_direct_ipv6_ips }} counter return
	{% endif /* wan_direct_ipv6_ips */ %}

	{% if (routing_mode === 'gfwlist' && dnsmasq_nftset()): %}
	ip daddr != @homeproxy_gfw_list_v4 counter return
	{% if (v6_handled): %}
	ip6 daddr != @homeproxy_gfw_list_v6 counter return
	{% endif /* v6_handled */ %}
	{% if (udp_quic_rejected): %}
	udp dport { 80, 443 } counter reject comment "!{{ cfgname }}: Block QUIC (UDP path is not UDP-native)"
	{% endif /* udp_quic_rejected */ %}
	{% elif (routing_mode === 'bypass_mainland_china' || bypass_cn_traffic === '1'): %}
	ip daddr @homeproxy_mainland_addr_v4 counter return
	{% if (v6_handled): %}
	ip6 daddr @homeproxy_mainland_addr_v6 counter return
	{% endif /* v6_handled */ %}
	{% if (udp_quic_rejected): %}
	udp dport { 80, 443 } counter reject comment "!{{ cfgname }}: Block QUIC (UDP path is not UDP-native)"
	{% endif /* udp_quic_rejected */ %}
	{% elif (routing_mode === 'proxy_mainland_china'): %}
	ip daddr != @homeproxy_mainland_addr_v4 counter return
	{% if (v6_handled): %}
	ip6 daddr != @homeproxy_mainland_addr_v6 counter return
	{% endif /* v6_handled */ %}
	{% endif /* routing_mode */ %}

	{% if (nftarr.lan_gaming_mode_ipv4_ips): %}
	ip saddr {{ nftarr.lan_gaming_mode_ipv4_ips }} counter meta mark set {{ tun_mark }}
	{% endif /* lan_gaming_mode_ipv4_ips */ %}
	{% if (nftarr.lan_gaming_mode_ipv6_ips): %}
	ip6 saddr {{ nftarr.lan_gaming_mode_ipv6_ips }} counter meta mark set {{ tun_mark }}
	{% endif /* lan_gaming_mode_ipv6_ips */ %}
	{% if (nftarr.lan_gaming_mode_mac_addrs): %}
	ether saddr {{ nftarr.lan_gaming_mode_mac_addrs }} counter meta mark set {{ tun_mark }}
	{% endif /* lan_gaming_mode_mac_addrs */ %}

	counter goto homeproxy_mangle_tun_mark
}

chain mangle_prerouting {
	meta nfproto { {{ (v6_handled) ? 'ipv4, ipv6' : 'ipv4' }} } meta l4proto { {{ (proxy_mode === 'tun') ? 'tcp, udp' : 'udp' }} } jump homeproxy_mangle_lanac{{ v6_warn_comment }}
}

chain mangle_output {
	meta nfproto { {{ (v6_handled) ? 'ipv4, ipv6' : 'ipv4' }} } meta l4proto { {{ (proxy_mode === 'tun') ? 'tcp, udp' : 'udp' }} } jump homeproxy_mangle_tun
}
{% endif %}