Add dnskmasq interactive install

Install/common/templates/dnsmasq.conf

@@ -0,0 +1,14 @@
+port=53
+
+listen-address=127.0.0.1
+bind-interfaces
+
+domain-needed
+bogus-priv
+
+cache-size=10000
+
+conf-dir=/opt/etc/dnsmasq.d
+
+server={{DNS1}}
+server={{DNS2}}

Install/install_func.sh

@@ -20,11 +20,128 @@ select_dns_mode(){
       MODE="dnsmasq"
       echo -e "\nYou use dnsmasq mode\n"
   else
-      echo -e "\nadguardhome or dnsmasq is not running!\nPlease install and configure one of it first!!!\n"
-      exit 0
+      printf "\nAdGuardHome or dnsmasq was not found.\n"
+      printf "No supported DNS backend was found. Install dnsmasq from Entware now? [Y/n] "
+
+      read -r ANSWER
+
+      case "$ANSWER" in
+          n|N)
+              echo "Installation cancelled."
+              exit 0
+              ;;
+          *)
+              install_dnsmasq_func
+              MODE="dnsmasq"
+              ;;
+      esac
   fi
 }
 
+install_dnsmasq_func() {
+
+  echo
+  echo "Installing dnsmasq..."
+
+  $SYSTEM_FOLDER/bin/opkg update
+  echo
+  echo "Installing dnsmasq..."
+
+  $SYSTEM_FOLDER/bin/opkg update
+
+  if ! $SYSTEM_FOLDER/bin/opkg install dnsmasq-full; then
+      echo
+      echo "Failed to install dnsmasq."
+      exit 1
+  fi
+
+  mkdir -p "$SYSTEM_FOLDER/etc/dnsmasq.d"
+
+  $SYSTEM_FOLDER/bin/opkg update
+
+  select_dns_provider_func
+
+  #
+  # Создаем конфиг только если его нет
+  #
+  if [ ! -f "$SYSTEM_FOLDER/etc/dnsmasq.conf" ]; then
+
+      echo "Creating default dnsmasq configuration..."
+
+      sed \
+          -e "s/{{DNS1}}/$DNS1/" \
+          -e "s/{{DNS2}}/$DNS2/" \
+          "$HOME_FOLDER/Install/common/templates/dnsmasq.conf" \
+          > "$SYSTEM_FOLDER/etc/dnsmasq.conf"
+
+  else
+
+      echo "Existing dnsmasq.conf found."
+      echo "Keeping current configuration."
+
+  fi
+
+  if [ -f "$SYSTEM_FOLDER/etc/init.d/S56dnsmasq" ]; then
+      chmod +x "$SYSTEM_FOLDER/etc/init.d/S56dnsmasq"
+      "$SYSTEM_FOLDER/etc/init.d/S56dnsmasq" enable 2>/dev/null
+      "$SYSTEM_FOLDER/etc/init.d/S56dnsmasq" start
+  fi
+
+  sleep 2
+
+  if [ $("$SYSTEM_FOLDER/etc/init.d/S56dnsmasq" check | grep -c alive) -ne 1 ]; then
+      echo
+      echo "dnsmasq failed to start."
+      exit 1
+  fi
+
+}
+
+select_dns_provider_func(){
+
+  echo
+  echo "Select upstream DNS:"
+  echo " 1 - Google (default)"
+  echo " 2 - Cloudflare"
+  echo " 3 - Quad9"
+  echo " 4 - AdGuard DNS"
+  echo " 5 - Custom"
+
+  read ANSWER
+
+  case "$ANSWER" in
+
+      2)
+          DNS1=1.1.1.1
+          DNS2=1.0.0.1
+          ;;
+
+      3)
+          DNS1=9.9.9.9
+          DNS2=149.112.112.112
+          ;;
+
+      4)
+          DNS1=94.140.14.14
+          DNS2=94.140.15.15
+          ;;
+
+      5)
+          echo "Primary DNS:"
+          read -r DNS1
+
+          echo "Secondary DNS:"
+          read -r DNS2
+          ;;
+
+      *)
+          DNS1=8.8.8.8
+          DNS2=8.8.4.4
+          ;;
+  esac
+}
+
+
 # Install packages
 install_packages_func(){
   # Update busybox
@@ -65,7 +182,7 @@ get_old_config_func(){
 
 try_get_bird4static_config_func(){
   echo -e "\nFound bird4static. Do you want use his config? y/n"
-  read ANSWER
+  read -r ANSWER
   if [ "$ANSWER" == "y" ]; then
     cd $HOME_FOLDER && cd ..
     if [ -f "scripts/func.sh" ]; then
@@ -81,7 +198,7 @@ try_get_bird4static_config_func(){
 select_number_vpn_func(){
   if [ -z "$VCONF" ]; then
     echo -e "\nDo you want to use double vpn configuration? 1 - no (default) 2 - yes"
-    read VCONF
+    read -r VCONF
   fi
   if [ "$VCONF" != "2" ]; then 
     VCONF=1
@@ -172,8 +289,10 @@ change_dns_config(){
   if [ "$MODE" == "adguardhome" ]; then
     sed -i 's/ipset_file.*/ipset_file: '$SYSTEM_FOLDER_SED'\/etc\/ipset4static_list.conf/' $SYSTEM_FOLDER/etc/AdGuardHome/AdGuardHome.yaml
   elif [ "$MODE" == "dnsmasq" ]; then
-    if [ $(cat $SYSTEM_FOLDER/etc/dnsmasq.conf | grep conf-file=$SYSTEM_FOLDER/etc/ipset4static_list.conf -c ) -eq 0 ]; then
-      echo conf-file=$SYSTEM_FOLDER/etc/ipset4static_list.conf >> $SYSTEM_FOLDER/etc/dnsmasq.conf
+    if ! grep -q "^conf-file=$SYSTEM_FOLDER/etc/ipset4static_list.conf$" \
+        "$SYSTEM_FOLDER/etc/dnsmasq.conf"; then
+        echo "conf-file=$SYSTEM_FOLDER/etc/ipset4static_list.conf" \
+            >> "$SYSTEM_FOLDER/etc/dnsmasq.conf"
     fi
   fi