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 PROG=/usr/sbin/https_dns_proxy
   9
  10 xappend() { param="$param $1"; }
  11
  12 append_parm() {
  13         local section="$1"
  14         local option="$2"
  15         local switch="$3"
  16         local default="$4"
  17         local _loctmp
  18         config_get _loctmp "$section" "$option" "$default"
  19         [ -z "$_loctmp" ] && return 0
  20         xappend "$switch $_loctmp"
  21 }
  22
  23 start_instance() {
  24         local cfg="$1" param listen_addr listen_port
  25
  26         append_parm "$cfg" 'listen_addr' '-a' '127.0.0.1'
  27         append_parm "$cfg" 'listen_port' '-p' "$p"
  28         append_parm "$cfg" 'bootstrap_dns' '-b'
  29         append_parm "$cfg" 'url_prefix' '-r'
  30         append_parm "$cfg" 'user' '-u' 'nobody'
  31         append_parm "$cfg" 'group' '-g' 'nogroup'
  32         append_parm "$cfg" 'subnet_addr' '-e'
  33         append_parm "$cfg" 'proxy_server' '-t'
  34
  35         procd_open_instance
  36 # shellcheck disable=SC2086
  37         procd_set_param command ${PROG} ${param}
  38         procd_set_param respawn
  39         procd_close_instance
  40
  41         config_get listen_addr "$cfg" 'listen_addr' '127.0.0.1'
  42         config_get listen_port "$cfg" 'listen_port' "$p"
  43         config_load 'dhcp'
  44 # shellcheck disable=SC2154
  45         config_foreach dnsmasq_add_doh_server 'dnsmasq' "${listen_addr}#${listen_port}"
  46         p="$((p+1))"
  47 }
  48
  49 service_triggers() {
  50         procd_add_reload_trigger 'https_dns_proxy'
  51 }
  52
  53 start_service() {
  54         local p=5053
  55         dhcp_backup 'create'
  56         config_load 'https_dns_proxy'
  57         config_foreach start_instance 'https_dns_proxy'
  58         if [ -z "$(uci -q get dhcp.@dnsmasq[0].server)" ]; then
  59                 dhcp_backup 'restore'
  60         fi
  61         if [ -n "$(uci -q changes dhcp)" ]; then
  62                 uci -q commit dhcp
  63                 [ -x /etc/init.d/dnsmasq ] && /etc/init.d/dnsmasq restart >/dev/null 2>&1
  64         fi
  65 }
  66
  67 stop_service() {
  68         dhcp_backup 'restore'
  69         if [ -n "$(uci -q changes dhcp)" ]; then
  70                 uci -q commit dhcp
  71                 [ -x /etc/init.d/dnsmasq ] && /etc/init.d/dnsmasq restart >/dev/null 2>&1
  72         fi
  73 }
  74
  75 dnsmasq_add_doh_server() {
  76         local cfg="$1" value="$2"
  77         uci -q add_list dhcp."$cfg".server="$value"
  78 }
  79
  80 dnsmasq_create_server_backup() {
  81         local cfg="$1" i
  82         if ! uci -q get "dhcp.$cfg.doh_backup_server" >/dev/null; then
  83                 for i in $(uci -q get "dhcp.$cfg.server"); do
  84                         uci -q add_list dhcp."$cfg".doh_backup_server="$i"
  85                 done
  86         fi
  87         uci -q del "dhcp.$cfg.server"
  88 }
  89
  90 dnsmasq_restore_server_backup() {
  91         local cfg="$1" i
  92         if uci -q get "dhcp.$cfg.doh_backup_server" >/dev/null; then
  93                 uci -q del "dhcp.$cfg.server"
  94                 for i in $(uci -q get "dhcp.$cfg.doh_backup_server"); do
  95                         uci -q add_list dhcp."$cfg".server="$i"
  96                 done
  97         fi
  98 }
  99
 100 dhcp_backup() {
 101         config_load 'dhcp'
 102         case "$1" in
 103                 create)
 104                         config_foreach dnsmasq_create_server_backup 'dnsmasq';;
 105                 restore)
 106                         config_foreach dnsmasq_restore_server_backup 'dnsmasq';;
 107         esac
 108 }