✨ add support for Duck DNS as DynDNS2 provider

dynb.sh

@@ -12,7 +12,7 @@
 
 _dyn_domain=
 
-## service provider could be inwx
+## service provider could be deSEC, duckdns, dynv6, inwx
 _serviceProvider=
 
 ## update method options: domrobot, dyndns
@@ -287,6 +287,7 @@ parse_commandline "$@"
 ### END OF CODE GENERATED BY Argbash (sortof) ### ])
 # [ <-- needed because of Argbash
 
+# The generated argbash help message does not look as nice as this:
 _help_message="$(cat << 'EOF'
 dynb - dynamic DNS update script for bash
 
@@ -430,20 +431,26 @@ function dynupdate() {
 
   INWX_DYNDNS_UPDATE_URL="https://dyndns.inwx.com/nic/update?"
   DESEC_DYNDNS_UPDATE_URL="https://update.dedyn.io/?"
+  DUCKDNS_DYNDNS_UPDATE_URL="https://www.duckdns.org/update?domains=$_dyn_domain&token=$_token&"
   DYNV6_DYNDNS_UPDATE_URL="https://dynv6.com/api/update?zone=$_dyn_domain&token=$_token&"
 
   case $_serviceProvider in
-    inwx | INWX )
+    inwx* | INWX* )
       dyndns_update_url=$INWX_DYNDNS_UPDATE_URL
     ;;
-    deSEC | desec* | dedyn* )
+    deSEC* | desec* | dedyn* )
       dyndns_update_url="${DESEC_DYNDNS_UPDATE_URL}"
     ;;
-    dynv6 )
+    dynv6* )
       dyndns_update_url="${DYNV6_DYNDNS_UPDATE_URL}"
       myip_str=ipv4
       myipv6_str=ipv6
     ;;
+    DuckDNS* | duckdns* )
+      dyndns_update_url="${DUCKDNS_DYNDNS_UPDATE_URL}"
+      myip_str=ipv4
+      myipv6_str=ipv6
+    ;;
     * )
     echoerr "$_serviceProvider is not supported"
     exit 1
@@ -464,20 +471,20 @@ function dynupdate() {
 
   ## request ##
   case $_serviceProvider in
-    inwx | INWX )
+    inwx* | INWX* )
       _response=$(curl --silent "$_interface_str" \
       --user-agent "$_userAgent" \
       --user "$_username":"$_password" \
       "${dyndns_update_url}" )
     ;;
-    deSEC | desec* | dedyn* )
+    deSEC* | desec* | dedyn* )
       _response=$(curl --silent "$_interface_str" \
       --user-agent "$_userAgent" \
       --header "Authorization: Token $_token" \
       --get --data-urlencode "hostname=$_dyn_domain" \
       "${dyndns_update_url}" )
     ;;
-    dynv6 )
+    dynv6* | duckDNS* | duckdns* )
       _response=$(curl --silent "$_interface_str" \
         --user-agent "$_userAgent" \
         "${dyndns_update_url}"
@@ -486,7 +493,7 @@ function dynupdate() {
   esac
 
   case $_response in
-    good* )
+    good* | OK* )
       if [[ $_response == "good 127.0.0.1" ]]; then
         echoerr "Error: $_response: Request ignored."
         return 1
@@ -645,10 +652,10 @@ function ipHasChanged() {
 
   if [[ ${1} == 4 ]]; then
     _new_IPv4=$remote_ip
-    #echo "New IPv4: $_new_IPv4 old was: $dns_ip"
+    debugMessage "New IPv4: $_new_IPv4 old was: $dns_ip"
   else
     _new_IPv6=$remote_ip
-    #echo "New IPv6: $_new_IPv6 old was: $dns_ip"
+    debugMessage "New IPv6: $_new_IPv6 old was: $dns_ip"
   fi
 
   if [[ "$remote_ip" == "$dns_ip" ]]; then