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357 lines
11 KiB
357 lines
11 KiB
#!/bin/sh /etc/rc.common
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# Copyright 2019-2022 Stan Grishin (stangri@melmac.ca)
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# shellcheck disable=SC1091,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 packageName='https-dns-proxy'
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readonly serviceName="$packageName $PKG_VERSION"
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readonly sharedMemoryOutput="/dev/shm/$packageName-output"
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readonly _OK_='\033[0;32m\xe2\x9c\x93\033[0m'
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readonly _FAIL_='\033[0;31m\xe2\x9c\x97\033[0m'
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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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readonly canaryDomainsMozilla='use-application-dns.net'
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readonly canaryDomainsiCloud='mask.icloud.com mask-h2.icloud.com'
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canaryDomains=
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canary_domains_icloud=
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canary_domains_mozilla=
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update_dnsmasq_config=
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force_dns=
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force_dns_port=
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str_contains() { [ -n "$1" ] &&[ -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 "$1" ":"; }
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output() {
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local msg memmsg logmsg
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[ -t 1 ] && printf "%b" "$@"
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msg="${1//$serviceName /service }";
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if [ "$(printf "%b" "$msg" | wc -l)" -gt 0 ]; then
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[ -s "$sharedMemoryOutput" ] && memmsg="$(cat "$sharedMemoryOutput")"
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logmsg="$(printf "%b" "${memmsg}${msg}" | sed 's/\x1b\[[0-9;]*m//g')"
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logger -t "$packageName" "$(printf "%b" "$logmsg")"
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rm -f "$sharedMemoryOutput"
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else
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printf "%b" "$msg" >> "$sharedMemoryOutput"
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fi
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}
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output_ok() { output "$_OK_"; }
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output_okn() { output "${_OK_}\\n"; }
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output_fail() { output "$_FAIL_"; }
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output_failn() { output "${_FAIL_}\\n"; }
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uci_add_list_if_new() {
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local PACKAGE="$1"
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local CONFIG="$2"
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local OPTION="$3"
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local VALUE="$4"
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local i
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[ -n "$PACKAGE" ] && [ -n "$CONFIG" ] && [ -n "$OPTION" ] && [ -n "$VALUE" ] || return 1
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for i in $(uci_get "$PACKAGE" "$CONFIG" "$OPTION"); do
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[ "$i" = "$VALUE" ] && return 0
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done
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uci_add_list "$PACKAGE" "$CONFIG" "$OPTION" "$VALUE"
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}
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uci_changes() {
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local PACKAGE="$1"
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local CONFIG="$2"
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local OPTION="$3"
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/sbin/uci ${UCI_CONFIG_DIR:+-c $UCI_CONFIG_DIR} changes "$PACKAGE${CONFIG:+.$CONFIG}${OPTION:+.$OPTION}"
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}
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dnsmasq_restart() { [ -x /etc/init.d/dnsmasq ] || return 0; /etc/init.d/dnsmasq restart >/dev/null 2>&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="$1" param listen_addr listen_port ipv6_resolvers_only p
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config_get_bool ipv6_resolvers_only "$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' "$port"
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append_parm "$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 $param
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procd_set_param stderr 1
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procd_set_param stdout 1
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procd_set_param respawn
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if [ "$force_dns" -ne 0 ]; then
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procd_open_data
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json_add_array firewall
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for p in $force_dns_port; do
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if netstat -tuln | grep 'LISTEN' | grep ":${p}" >/dev/null 2>&1 || [ "$p" = '53' ]; then
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json_add_object ''
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json_add_string type redirect
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json_add_string target DNAT
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json_add_string src lan
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json_add_string proto 'tcp udp'
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json_add_string src_dport "$p"
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json_add_string dest_port "$p"
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json_add_boolean reflection 0
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json_close_object
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else
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json_add_object ''
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json_add_string type rule
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json_add_string src lan
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json_add_string dest '*'
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json_add_string proto 'tcp udp'
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json_add_string dest_port "$p"
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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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fi
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procd_close_instance
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if [ "$?" ]; then
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config_get listen_addr "$cfg" 'listen_addr' '127.0.0.1'
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config_get listen_port "$cfg" 'listen_port' "$port"
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if [ "$update_dnsmasq_config" = '*' ]; then
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config_load 'dhcp'
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config_foreach dnsmasq_doh_server 'dnsmasq' 'add' "${listen_addr}" "${listen_port}"
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elif [ -n "$update_dnsmasq_config" ]; then
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for i in $update_dnsmasq_config; do
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if [ -n "$(uci_get 'dhcp' "@dnsmasq[$i]")" ]; then
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dnsmasq_doh_server "@dnsmasq[$i]" 'add' "${listen_addr}" "${listen_port}"
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elif [ -n "$(uci_get 'dhcp' "$i")" ]; then
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dnsmasq_doh_server "${i}" 'add' "${listen_addr}" "${listen_port}"
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fi
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done
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fi
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output_ok
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port="$((port+1))"
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force_dns=0
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else
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output_fail
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fi
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}
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start_service() {
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local port=5053
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output "Starting $serviceName "
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config_load "$packageName"
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config_get update_dnsmasq_config 'config' 'update_dnsmasq_config' '*'
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config_get_bool canary_domains_icloud 'config' 'canary_domains_icloud' '1'
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config_get_bool canary_domains_mozilla 'config' 'canary_domains_mozilla' '1'
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config_get_bool force_dns 'config' 'force_dns' '1'
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config_get force_dns_port 'config' 'force_dns_port' '53 853'
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if [ "$canary_domains_icloud" -ne 0 ]; then
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canaryDomains="${canaryDomains:+$canaryDomains }${canaryDomainsiCloud}"
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fi
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if [ "$canary_domains_mozilla" -ne 0 ]; then
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canaryDomains="${canaryDomains:+$canaryDomains }${canaryDomainsMozilla}"
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fi
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dhcp_backup 'create'
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config_load "$packageName"
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config_foreach start_instance "$packageName"
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if [ -n "$(uci_changes dhcp)" ]; then
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uci_commit 'dhcp'
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dnsmasq_restart
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fi
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output "\\n"
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}
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stop_service() {
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local s=0
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output "Stopping $serviceName "
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config_load "$packageName"
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config_get update_dnsmasq_config 'config' 'update_dnsmasq_config' '*'
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dhcp_backup 'restore'
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if [ -n "$(uci_changes dhcp)" ]; then
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uci_commit 'dhcp'
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dnsmasq_restart || s=1
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fi
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# shellcheck disable=SC2015
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[ "$s" -eq 0 ] && output_okn || output_failn
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}
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# shellcheck disable=SC1091
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service_triggers() {
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local iface
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. /lib/functions/network.sh
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network_flush_cache
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network_find_wan iface
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iface="${iface:-wan}"
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if [ -n "$iface" ]; then
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procd_add_interface_trigger "interface.*" "$iface" "/etc/init.d/${packageName}" restart
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fi
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procd_add_config_trigger "config.change" "$packageName" "/etc/init.d/${packageName}" restart
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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_doh_server() {
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local cfg="$1" param="$2" address="${3:-127.0.0.1}" port="$4" i
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case "$param" in
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add)
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if [ "$force_dns" -ne 0 ]; then
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for i in $canaryDomains; do
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uci_add_list_if_new 'dhcp' "$cfg" 'server' "/${i}/"
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done
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fi
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case $address in
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0.0.0.0|::ffff:0.0.0.0) address='127.0.0.1';;
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::) address='::1';;
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esac
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uci_add_list_if_new 'dhcp' "$cfg" 'server' "${address}#${port}"
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;;
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remove)
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eval "$(ubus call service list "{ 'verbose': true, 'name': '$packageName' }" | jsonfilter -F '# ' -e 'TUPLES=@[*].instances[*].command[4,6]')"
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for i in $TUPLES; do
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uci_remove_list 'dhcp' "$cfg" 'server' "$i"
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done
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for i in $canaryDomains; do
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uci_remove_list 'dhcp' "$cfg" 'server' "/${i}/"
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done
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;;
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esac
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}
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dnsmasq_create_server_backup() {
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local cfg="$1" i
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[ -n "$(uci_get 'dhcp' "$cfg")" ] || return 1
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if [ -z "$(uci_get 'dhcp' "$cfg" 'doh_backup_noresolv')" ]; then
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if [ -z "$(uci_get 'dhcp' "$cfg" 'noresolv')" ]; then
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uci_set 'dhcp' "$cfg" 'doh_backup_noresolv' '-1'
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else
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uci_set 'dhcp' "$cfg" 'doh_backup_noresolv' "$(uci_get 'dhcp' "$cfg" noresolv)"
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fi
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uci_set 'dhcp' "$cfg" 'noresolv' 1
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fi
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if [ -z "$(uci_get 'dhcp' "$cfg" 'doh_backup_server')" ]; then
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if [ -z "$(uci_get 'dhcp' "$cfg" 'server')" ]; then
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uci_add_list 'dhcp' "$cfg" 'doh_backup_server' ""
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fi
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for i in $(uci_get 'dhcp' "$cfg" 'server'); do
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uci_add_list 'dhcp' "$cfg" 'doh_backup_server' "$i"
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if [ "$i" = "$(echo "$i" | tr -d /\#)" ]; then
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uci_remove_list 'dhcp' "$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="$1" i
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[ -n "$(uci_get 'dhcp' "$cfg")" ] || return 0
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if [ -n "$(uci_get 'dhcp' "$cfg" 'doh_backup_noresolv')" ]; then
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if [ "$(uci_get 'dhcp' "$cfg" 'doh_backup_noresolv')" = "-1" ]; then
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uci_remove 'dhcp' "$cfg" 'noresolv'
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else
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uci_set 'dhcp' "$cfg" 'noresolv' "$(uci_get 'dhcp' "$cfg" 'doh_backup_noresolv')"
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fi
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uci_remove 'dhcp' "$cfg" 'doh_backup_noresolv'
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fi
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if [ -n "$(uci_get 'dhcp' "$cfg" 'doh_backup_server')" ]; then
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dnsmasq_doh_server "$cfg" 'remove'
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for i in $(uci_get 'dhcp' "$cfg" 'doh_backup_server'); do
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uci_add_list_if_new 'dhcp' "$cfg" 'server' "$i"
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done
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uci_remove '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 "$1" in
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create)
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if [ "$update_dnsmasq_config" = "*" ]; then
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config_foreach dnsmasq_create_server_backup 'dnsmasq'
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elif [ -n "$update_dnsmasq_config" ]; then
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for i in $update_dnsmasq_config; do
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if [ -n "$(uci_get 'dhcp' "@dnsmasq[$i]")" ]; then
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dnsmasq_create_server_backup "@dnsmasq[$i]"
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elif [ -n "$(uci_get 'dhcp' "$i")" ]; then
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dnsmasq_create_server_backup "$i"
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fi
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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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