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262 lines
7.6 KiB
262 lines
7.6 KiB
#!/bin/sh /etc/rc.common
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# Copyright 2019-2020 Stan Grishin (stangri@melmac.net)
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# shellcheck disable=SC2039,SC3043,SC3060
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PKG_VERSION='dev-test'
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# shellcheck disable=SC2034
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START=80
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# shellcheck disable=SC2034
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USE_PROCD=1
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if type extra_command 1>/dev/null 2>&1; then
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extra_command 'version' 'Show version information'
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else
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# shellcheck disable=SC2034
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EXTRA_COMMANDS='version'
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fi
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readonly PROG=/usr/sbin/https-dns-proxy
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readonly DEFAULT_BOOTSTRAP='1.1.1.1,1.0.0.1,2606:4700:4700::1111,2606:4700:4700::1001,8.8.8.8,8.8.4.4,2001:4860:4860::8888,2001:4860:4860::8844'
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dnsmasqConfig=''; forceDNS=''; forceDNSPorts='';
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str_contains() { [ -n "$2" ] && [ "${1//$2}" != "$1" ]; }
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is_mac_address() { expr "$1" : '[0-9A-F][0-9A-F]:[0-9A-F][0-9A-F]:[0-9A-F][0-9A-F]:[0-9A-F][0-9A-F]:[0-9A-F][0-9A-F]:[0-9A-F][0-9A-F]$' >/dev/null; }
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is_ipv4() { expr "$1" : '[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*$' >/dev/null; }
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is_ipv6() { ! is_mac_address "$1" && str_contains "$1" ":"; }
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version() { echo "$PKG_VERSION"; }
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xappend() { param="$param $1"; }
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append_bool() {
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local section="$1"
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local option="$2"
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local value="$3"
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local default="${4:-0}"
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local _loctmp
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config_get_bool _loctmp "$section" "$option" "$default"
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[ "$_loctmp" -ne 0 ] && xappend "$value"
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}
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append_parm() {
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local section="$1"
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local option="$2"
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local switch="$3"
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local default="$4"
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local _loctmp
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config_get _loctmp "$section" "$option" "$default"
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[ -n "$_loctmp" ] && xappend "$switch $_loctmp"
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}
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append_counter() {
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local section="$1"
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local option="$2"
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local switch="$3"
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local default="${4:-0}"
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local _loctmp i
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config_get _loctmp "$section" "$option" "$default"
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# shellcheck disable=SC2086,SC2154
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for i in $(seq 1 $_loctmp); do
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xappend '-v'
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done
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}
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append_bootstrap() {
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local section="$1"
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local option="$2"
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local switch="$3"
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local default="$4"
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local _old_ifs="$IFS"
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local _loctmp _newtmp i
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config_get _loctmp "$section" "$option" "$default"
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[ -z "$_loctmp" ] && return 0
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IFS=" ,"
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for i in $_loctmp; do
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if { [ "$ipv6_resolvers_only" -eq 0 ] && is_ipv4 "$i"; } || \
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{ [ "$ipv6_resolvers_only" -ne 0 ] && is_ipv6 "$i"; }; then
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[ -z "$_newtmp" ] && _newtmp="$i" || _newtmp="${_newtmp},${i}"
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fi
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done
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IFS="$_old_ifs"
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[ -n "$_newtmp" ] && xappend "$switch $_newtmp"
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[ "$ipv6_resolvers_only" -eq 0 ] && xappend '-4'
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}
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start_instance() {
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local cfg="$1" param listen_addr listen_port i ipv6_resolvers_only
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config_get_bool ipv6_resolvers_only "$cfg" 'use_ipv6_resolvers_only' '0'
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append_parm "$cfg" 'resolver_url' '-r'
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append_parm "$cfg" 'polling_interval' '-i'
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append_parm "$cfg" 'listen_addr' '-a' '127.0.0.1'
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append_parm "$cfg" 'listen_port' '-p' "$p"
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append_parm "$cfg" 'dscp_codepoint' '-c'
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append_bootstrap "$cfg" 'bootstrap_dns' '-b' "$DEFAULT_BOOTSTRAP"
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append_parm "$cfg" 'user' '-u' 'nobody'
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append_parm "$cfg" 'group' '-g' 'nogroup'
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append_parm "$cfg" 'proxy_server' '-t'
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append_parm "$cfg" 'logfile' '-l'
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append_bool "$cfg" 'use_http1' '-x'
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append_counter "$cfg" 'verbosity' '-v' '0'
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procd_open_instance
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# shellcheck disable=SC2086
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procd_set_param command $PROG $param
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procd_set_param stderr 1
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procd_set_param stdout 1
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procd_set_param respawn
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if [ "$forceDNS" -ne 0 ]; then
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procd_open_data
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json_add_array firewall
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for c in $forceDNSPorts; do
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if netstat -tuln | grep 'LISTEN' | grep ":${c}" >/dev/null 2>&1 || [ "$c" = "53" ]; then
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json_add_object ""
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json_add_string type redirect
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json_add_string target DNAT
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json_add_string src lan
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json_add_string proto "tcp udp"
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json_add_string src_dport "$c"
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json_add_string dest_port "$c"
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json_add_boolean reflection 0
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json_close_object
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else
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json_add_object ""
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json_add_string type rule
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json_add_string src lan
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json_add_string dest "*"
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json_add_string proto "tcp udp"
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json_add_string dest_port "$c"
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json_add_string target REJECT
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json_close_object
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fi
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done
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json_close_array
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procd_close_data
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forceDNS='0'
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fi
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procd_close_instance
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config_get listen_addr "$cfg" 'listen_addr' '127.0.0.1'
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config_get listen_port "$cfg" 'listen_port' "$p"
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if [ "$dnsmasqConfig" = "*" ]; then
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config_load 'dhcp'
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config_foreach dnsmasq_add_doh_server 'dnsmasq' "${listen_addr}" "${listen_port}"
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elif [ -n "$dnsmasqConfig" ]; then
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for i in $dnsmasqConfig; do
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dnsmasq_add_doh_server "@dnsmasq[${i}]" "${listen_addr}" "${listen_port}"
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done
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fi
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p="$((p+1))"
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}
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is_force_dns_active() { iptables-save | grep -q -w -- '--dport 53'; }
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start_service() {
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local p=5053 c
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config_load 'https-dns-proxy'
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config_get dnsmasqConfig 'config' 'update_dnsmasq_config' '*'
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config_get_bool forceDNS 'config' 'force_dns' '1'
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config_get forceDNSPorts 'config' 'force_dns_port' '53 853'
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dhcp_backup 'create'
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config_load 'https-dns-proxy'
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config_foreach start_instance 'https-dns-proxy'
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if [ -n "$(uci -q changes dhcp)" ]; then
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uci -q commit dhcp
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[ -x /etc/init.d/dnsmasq ] && /etc/init.d/dnsmasq restart >/dev/null 2>&1
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fi
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}
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stop_service() {
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config_load 'https-dns-proxy'
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config_get dnsmasqConfig 'config' 'update_dnsmasq_config' '*'
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dhcp_backup 'restore'
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if [ -n "$(uci -q changes dhcp)" ]; then
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uci -q commit dhcp
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[ -x /etc/init.d/dnsmasq ] && /etc/init.d/dnsmasq restart >/dev/null 2>&1
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fi
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}
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service_triggers() {
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procd_add_config_trigger "config.change" "https-dns-proxy" /etc/init.d/https-dns-proxy reload
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}
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service_started() { procd_set_config_changed firewall; }
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service_stopped() { procd_set_config_changed firewall; }
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dnsmasq_add_doh_server() {
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local cfg="$1" address="$2" port="$3"
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case $address in
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0.0.0.0|::ffff:0.0.0.0) address='127.0.0.1';;
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::) address='::1';;
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esac
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uci -q del_list "dhcp.${cfg}.server=${address}#${port}"
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uci -q add_list "dhcp.${cfg}.server=${address}#${port}"
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}
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dnsmasq_create_server_backup() {
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local cfg="$1"
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local i
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uci -q get "dhcp.${cfg}" >/dev/null || return 1
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if ! uci -q get "dhcp.${cfg}.doh_backup_noresolv" >/dev/null; then
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if [ -z "$(uci -q get "dhcp.${cfg}.noresolv")" ]; then
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uci -q set "dhcp.${cfg}.noresolv=1"
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uci -q set "dhcp.${cfg}.doh_backup_noresolv=-1"
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elif [ "$(uci -q get "dhcp.${cfg}.noresolv")" != "1" ]; then
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uci -q set "dhcp.${cfg}.noresolv=1"
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uci -q set "dhcp.${cfg}.doh_backup_noresolv=0"
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fi
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fi
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if ! uci -q get "dhcp.${cfg}.doh_backup_server" >/dev/null; then
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if [ -z "$(uci -q get "dhcp.${cfg}.server")" ]; then
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uci -q add_list "dhcp.${cfg}.doh_backup_server="
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fi
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for i in $(uci -q get "dhcp.${cfg}.server"); do
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uci -q add_list "dhcp.${cfg}.doh_backup_server=$i"
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if [ "$i" = "$(echo "$i" | tr -d /\#)" ]; then
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uci -q del_list "dhcp.${cfg}.server=$i"
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fi
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done
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fi
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return 0
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}
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dnsmasq_restore_server_backup() {
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local cfg="$1"
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local i
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uci -q get "dhcp.${cfg}" >/dev/null || return 0
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if uci -q get "dhcp.${cfg}.doh_backup_noresolv" >/dev/null; then
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if [ "$(uci -q get "dhcp.${cfg}.doh_backup_noresolv")" = "0" ]; then
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uci -q set "dhcp.${cfg}.noresolv=0"
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else
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uci -q del "dhcp.${cfg}.noresolv"
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fi
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uci -q del "dhcp.${cfg}.doh_backup_noresolv"
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fi
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if uci -q get "dhcp.${cfg}.doh_backup_server" >/dev/null; then
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uci -q del "dhcp.${cfg}.server"
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for i in $(uci -q get "dhcp.${cfg}.doh_backup_server"); do
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uci -q add_list "dhcp.${cfg}.server=$i"
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done
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uci -q del "dhcp.${cfg}.doh_backup_server"
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fi
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}
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dhcp_backup() {
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local i
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config_load 'dhcp'
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case "$1" in
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create)
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if [ "$dnsmasqConfig" = "*" ]; then
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config_foreach dnsmasq_create_server_backup 'dnsmasq'
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elif [ -n "$dnsmasqConfig" ]; then
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for i in $dnsmasqConfig; do
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dnsmasq_create_server_backup "@dnsmasq[${i}]" || \
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dnsmasq_create_server_backup "$i"
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done
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fi
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;;
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restore)
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config_foreach dnsmasq_restore_server_backup 'dnsmasq'
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;;
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esac
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}
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