#!/bin/sh /etc/rc.common
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# Copyright (C) 2021 Tianling Shen <cnsztl@immortalwrt.org>
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USE_PROCD=1
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START=90
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CONF="dnsproxy"
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PROG="/usr/bin/dnsproxy"
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is_enabled() {
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local enabled
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config_get enabled "$1" "$2" "0"
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if [ "$enabled" -eq "1" ]; then
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return 0
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else
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return 1
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fi
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}
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is_empty() {
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local empty
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config_get empty "$1" "$2" $3
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if [ -z "$empty" ]; then
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return 0
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else
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return 1
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fi
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}
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append_param() {
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procd_append_param command "$1" $2
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}
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append_param_arg() {
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local value
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config_get value "$1" "$2" $4
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[ -n "$value" ] && append_param "$3" "$value"
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}
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append_param_bool() {
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is_enabled "$1" "$2" && append_param "--${2//_/-}"
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}
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load_config_arg() {
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append_param_bool "$1" "all_servers"
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append_param_bool "$1" "fastest_addr"
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append_param_bool "$1" "insecure"
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append_param_bool "$1" "ipv6_disabled"
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append_param_bool "$1" "refuse_any"
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append_param_bool "$1" "verbose"
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}
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load_config_list() {
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is_empty "bogus_nxdomain" "ip_addr" || config_list_foreach "bogus_nxdomain" "ip_addr" "append_param '--bogus-nxdomain'"
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for i in "bootstrap" "fallback" "upstream"; do
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is_empty "servers" "$i" || config_list_foreach "servers" "$i" "append_param '--$i'"
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done
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}
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load_config_param() {
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append_param_arg "global" "listen_addr" "--listen" "127.0.0.1"
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append_param_arg "global" "listen_port" "--port" "5353"
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append_param_arg "global" "log_file" "--output"
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append_param_arg "global" "max_go_routines" "--max-go-routines"
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append_param_arg "global" "rate_limit" "--ratelimit"
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append_param_arg "global" "udp_buf_size" "--udp-buf-size"
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is_enabled "cache" "enabled" && {
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append_param "--cache"
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append_param_bool "cache" "cache_optimistic"
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append_param_arg "cache" "size" "--cache-size"
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append_param_arg "cache" "min_ttl" "--cache-min-ttl"
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append_param_arg "cache" "max_ttl" "--cache-max-ttl"
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}
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is_enabled "dns64" "enabled" && {
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append_param "--dns64"
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append_param_arg "dns64" "dns64_prefix" "--dns64-prefix"
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}
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is_enabled "edns" "enabled" && {
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append_param "--edns"
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append_param_arg "edns" "edns_addr" "--edns-addr"
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}
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}
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start_service() {
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config_load "$CONF"
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is_enabled "global" "enabled" || exit 1
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procd_open_instance "$CONF"
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procd_set_param command "$PROG"
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load_config_arg "global"
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load_config_list
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load_config_param
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procd_set_param respawn
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procd_set_param stdout 1
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procd_set_param stderr 1
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procd_set_param user dnsproxy
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procd_close_instance
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}
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reload_service() {
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stop
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start
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}
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service_triggers() {
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procd_add_reload_trigger "$CONF"
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}
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