net/https-dns-proxy/files/https-dns-proxy.init

   1 #!/bin/sh /etc/rc.common
   2 # Copyright 2019 Stan Grishin (stangri@melmac.net)
   3 # shellcheck disable=SC2039
   4
   5 export START=80
   6 export USE_PROCD=1
   7
   8 dnsmasqConfig=''
   9
  10 PROG=/usr/sbin/https-dns-proxy
  11
  12 xappend() { param="$param $1"; }
  13
  14 append_bool() {
  15         local section="$1"
  16         local option="$2"
  17         local value="$3"
  18         local default="$4"
  19         local _loctmp
  20         [ -z "$default" ] && default="0"
  21         config_get_bool _loctmp "$section" "$option" "$default"
  22         [ "$_loctmp" != "0" ] && xappend "$value"
  23 }
  24
  25 append_parm() {
  26         local section="$1"
  27         local option="$2"
  28         local switch="$3"
  29         local default="$4"
  30         local _loctmp
  31         config_get _loctmp "$section" "$option" "$default"
  32         [ -z "$_loctmp" ] && return 0
  33         xappend "$switch $_loctmp"
  34 }
  35
  36 start_instance() {
  37         local cfg="$1" param listen_addr listen_port i
  38
  39         append_parm "$cfg" 'listen_addr' '-a' '127.0.0.1'
  40         append_parm "$cfg" 'listen_port' '-p' "$p"
  41         append_parm "$cfg" 'bootstrap_dns' '-b'
  42         append_parm "$cfg" 'resolver_url' '-r'
  43         append_parm "$cfg" 'user' '-u' 'nobody'
  44         append_parm "$cfg" 'group' '-g' 'nogroup'
  45         append_parm "$cfg" 'proxy_server' '-t'
  46         append_parm "$cfg" 'logfile' '-l'
  47         append_bool "$cfg" 'use_http1' '-x'
  48         config_get_bool ipv6_resolvers_only "$cfg" 'use_ipv6_resolvers_only' '0'
  49         config_get verbosity "$cfg" 'verbosity' "0"
  50
  51 # shellcheck disable=SC2086,SC2154
  52         for i in $(seq 1 $verbosity); do
  53                 xappend "-v"
  54         done
  55 # shellcheck disable=SC2154
  56         if [ "$ipv6_resolvers_only" = 0 ]; then
  57                 xappend "-4"
  58         fi
  59
  60         procd_open_instance
  61 # shellcheck disable=SC2086
  62         procd_set_param command ${PROG} ${param}
  63         procd_set_param stderr 1
  64         procd_set_param stdout 1
  65         procd_set_param respawn
  66         procd_close_instance
  67
  68         config_get listen_addr "$cfg" 'listen_addr' '127.0.0.1'
  69         config_get listen_port "$cfg" 'listen_port' "$p"
  70
  71         if [ "$dnsmasqConfig" = "*" ]; then
  72                 config_load 'dhcp'
  73                 config_foreach dnsmasq_add_doh_server 'dnsmasq' "${listen_addr}" "${listen_port}"
  74         elif [ -n "$dnsmasqConfig" ]; then
  75                 for i in $dnsmasqConfig; do
  76                         dnsmasq_add_doh_server "@dnsmasq[${i}]" "${listen_addr}" "${listen_port}"
  77                 done
  78         fi
  79         p="$((p+1))"
  80 }
  81
  82 service_triggers() {
  83         procd_add_reload_trigger 'https-dns-proxy'
  84 }
  85
  86 start_service() {
  87         local p=5053
  88         config_load 'https-dns-proxy'
  89         config_get dnsmasqConfig        'config' 'update_dnsmasq_config' '*'
  90         dhcp_backup 'create'
  91         config_load 'https-dns-proxy'
  92         config_foreach start_instance 'https-dns-proxy'
  93         if [ -n "$(uci -q changes dhcp)" ]; then
  94                 uci -q commit dhcp
  95                 [ -x /etc/init.d/dnsmasq ] && /etc/init.d/dnsmasq restart >/dev/null 2>&1
  96         fi
  97 }
  98
  99 stop_service() {
 100         config_load 'https-dns-proxy'
 101         config_get dnsmasqConfig        'config' 'update_dnsmasq_config' '*'
 102         dhcp_backup 'restore'
 103         if [ -n "$(uci -q changes dhcp)" ]; then
 104                 uci -q commit dhcp
 105                 [ -x /etc/init.d/dnsmasq ] && /etc/init.d/dnsmasq restart >/dev/null 2>&1
 106         fi
 107 }
 108
 109 service_triggers() {
 110                 procd_add_reload_trigger 'https-dns-proxy'
 111 }
 112
 113 dnsmasq_add_doh_server() {
 114         local cfg="$1" address="$2" port="$3"
 115         case $address in
 116                 0.0.0.0|::ffff:0.0.0.0) address='127.0.0.1';;
 117                 ::) address='::1';;
 118         esac
 119         uci -q del_list "dhcp.${cfg}.server=${address}#${port}"
 120         uci -q add_list "dhcp.${cfg}.server=${address}#${port}"
 121 }
 122
 123 dnsmasq_create_server_backup() {
 124         local cfg="$1"
 125         local i
 126         uci -q get "dhcp.${cfg}" >/dev/null || return 0
 127         if ! uci -q get "dhcp.${cfg}.doh_backup_noresolv" >/dev/null; then
 128                 if [ -z "$(uci -q get "dhcp.${cfg}.noresolv")" ]; then
 129                         uci -q set "dhcp.${cfg}.noresolv=1"
 130                         uci -q set "dhcp.${cfg}.doh_backup_noresolv=-1"
 131                 elif [ "$(uci -q get "dhcp.${cfg}.noresolv")" != "1" ]; then
 132                         uci -q set "dhcp.${cfg}.noresolv=1"
 133                         uci -q set "dhcp.${cfg}.doh_backup_noresolv=0"
 134                 fi
 135         fi
 136         if ! uci -q get "dhcp.${cfg}.doh_backup_server" >/dev/null; then
 137                 for i in $(uci -q get "dhcp.${cfg}.server"); do
 138                         uci -q add_list "dhcp.${cfg}.doh_backup_server=$i"
 139                         if [ "$i" = "${i//127.0.0.1}" ] && [ "$i" = "$(echo "$i" | tr -d /)" ]; then
 140                                 uci -q del_list "dhcp.${cfg}.server=$i"
 141                         fi
 142                 done
 143         fi
 144 }
 145
 146 dnsmasq_restore_server_backup() {
 147         local cfg="$1"
 148         local i
 149         uci -q get "dhcp.${cfg}" >/dev/null || return 0
 150         if uci -q get "dhcp.${cfg}.doh_backup_noresolv" >/dev/null; then
 151                 if [ "$(uci -q get "dhcp.${cfg}.doh_backup_noresolv")" = "0" ]; then
 152                         uci -q set "dhcp.${cfg}.noresolv=0"
 153                 else
 154                         uci -q del "dhcp.${cfg}.noresolv"
 155                 fi
 156                 uci -q del "dhcp.${cfg}.doh_backup_noresolv"
 157         fi
 158         if uci -q get "dhcp.${cfg}.doh_backup_server" >/dev/null; then
 159                 uci -q del "dhcp.${cfg}.server"
 160                 for i in $(uci -q get "dhcp.${cfg}.doh_backup_server"); do
 161                         uci -q add_list "dhcp.${cfg}.server=$i"
 162                 done
 163         uci -q del "dhcp.${cfg}.doh_backup_server"
 164         fi
 165 }
 166
 167 dhcp_backup() {
 168         local i
 169         config_load 'dhcp'
 170         case "$1" in
 171                 create)
 172                         if [ "$dnsmasqConfig" = "*" ]; then
 173                                 config_foreach dnsmasq_create_server_backup 'dnsmasq'
 174                         elif [ -n "$dnsmasqConfig" ]; then
 175                                 for i in $dnsmasqConfig; do
 176                                         dnsmasq_create_server_backup "@dnsmasq[${i}]"
 177                                 done
 178                         fi
 179                         ;;
 180                 restore)
 181                         config_foreach dnsmasq_restore_server_backup 'dnsmasq'
 182                         ;;
 183         esac
 184 }