Fix dynv6 and just call every time

usr/local/bin/dynv6

@@ -16,8 +16,6 @@ The following are at least required for the script to work:
 - DYNV6_MAIL_ADDRESS="" // (optional) mail.rc has to be configured
 - DYNV6_TOKEN="" // the dynv6 token
 - DYNV6_HOSTNAME="" // the dynv6 hostname
-- DYNV6_DEVICE="" // the (optional) dynv6 device
-- DYNV6_NETMASK="" // the (optional) netmask
 
 You can copy this script to '/usr/local/bin' and use create a custom CONFIG_FILE as user. Examples can be found in '/usr/share/doc/<scriptname>'.
 EOF
@@ -51,77 +49,61 @@ apply_defaults() {
     [[ -z ${DYNV6_MAIL_ADDRESS} ]] && DYNV6_MAIL_ADDRESS="";
     [[ -z ${DYNV6_TOKEN} ]] && DYNV6_TOKEN="";
     [[ -z ${DYNV6_HOSTNAME} ]] && DYNV6_HOSTNAME="";
-    [[ -z ${DYNV6_DEVICE} ]] && DYNV6_DEVICE="";
-    [[ -z ${DYNV6_NETMASK} ]] && DYNV6_NETMASK="";
-    
 }
 check_required() {
     if [[ -z ${DYNV6_TOKEN} ]]; then
       echo "DYNV6_TOKEN is required"
-        exit 1;
+      exit 1;
     fi
     if [[ -z ${DYNV6_HOSTNAME} ]]; then
       echo "DYNV6_HOSTNAME is required"
-        exit 1;
+      exit 1;
     fi
-
-    if [ -e /usr/bin/curl ]; then
-      bin="curl -fsS"
-    elif [ -e /usr/bin/wget ]; then
-      bin="wget -O-"
-    else
-      echo "neither curl nor wget found"
-      exit 1
-    fi
-    }
+}
 
 # check requirements
 CONFIG_FILE="$1";
 FALLBACK_CONFIG_FILE="${HOME}/.dynv6.conf";
 source_config "${CONFIG_FILE}" "${FALLBACK_CONFIG_FILE}";
-apply_defaults;
-check_required;
+#apply_defaults;
+#check_required;
 
 # DO NOT CHANGE
 token=${DYNV6_TOKEN}
 hostname=${DYNV6_HOSTNAME}
-device=${DYNV6_DEVICE}
-netmask=${DYNV6_NETMASK}
 
-file=$HOME/.dynv6.addr6
-[ -e $file ] && old=`cat $file`
+echo "Checking ${hostname}"
 
-if [ -z "$netmask" ]; then
-  netmask=128
+# check via service
+# ipv6
+echo "Testing IPv6";
+ipv6Res=$(curl -fsS "http://dynv6.com/api/update?hostname=${hostname}&token=${token}")
+ipv6Changed=true;
+
+if [ "$ipv6Res" = "addresses unchanged" ]; then
+  ipv6Changed=false;
+fi
+if [ "$ipv6Changed" = "true" ]; then
+  echo "IPv6 changed"
+
+  if [ "${DYNV6_MAIL_ENABLED}" = true ]; then
+    HOSTMACHINE=$(hostname)
+    echo -e "IPv6 for ${hostname} on host ${HOSTMACHINE} changed" | mailx -s "[dynv6 IPv6 ${HOSTMACHINE}] IPv6 changed for ${hostname}" "${DYNV6_MAIL_ADDRESS}"
+  fi
 fi
 
-if [ -n "$device" ]; then
-  device="dev $device"
+# ipv4
+echo "Testing IPv4";
+ipv4Res=$(curl -fsS "http://ipv4.dynv6.com/api/update?hostname=${hostname}&ipv4=auto&token=${token}")
+ipv4Changed=true;
+if [ "$ipv4Res" = "addresses unchanged" ]; then
+  ipv4Changed=false;
 fi
-address=$(ip -6 addr list scope global $device | grep -v " fd" | sed -n 's/.*inet6 \([0-9a-f:]\+\).*/\1/p' | head -n 1)
+if [ "$ipv4Changed" = "true" ]; then
+  echo "IPv4 changed"
 
-if [ -z "$address" ]; then
-  echo "no IPv6 address found"
-  exit 1
-fi
-
-# address with netmask
-current=$address/$netmask
-
-if [ "$old" = "$current" ]; then
-  echo "IPv6 address unchanged"
-  exit
-fi
-
-# send addresses to dynv6
-$bin "http://dynv6.com/api/update?hostname=$hostname&ipv6=$current&token=$token"
-$bin "http://ipv4.dynv6.com/api/update?hostname=$hostname&ipv4=auto&token=$token"
-
-# save current address
-echo $current > $file
-
-# sent mail that IP changed
-if [ "${DYNV6_MAIL_ENABLED}" = true ]; then
-  HOSTMACHINE=$(hostname)
-  echo -e "IP for ${hostname} changed from '${old}' to '${address}' on host ${HOSTMACHINE}" | mailx -s "[dynv6 ${HOSTMACHINE}] IP changed for ${hostname}" "${DYNV6_MAIL_ADDRESS}"
+  if [ "${DYNV6_MAIL_ENABLED}" = true ]; then
+    HOSTMACHINE=$(hostname)
+    echo -e "IPv4 for ${hostname} on host ${HOSTMACHINE} changed" | mailx -s "[dynv6 IPv4 ${HOSTMACHINE}] IPv4 changed for ${hostname}" "${DYNV6_MAIL_ADDRESS}"
+  fi
 fi

usr/share/doc/dynv6/.dynv6.conf.example

@@ -3,5 +3,3 @@ DYNV6_MAIL_ENABLED= // if notify via mail
 DYNV6_MAIL_ADDRESS="" // (optional) mail.rc has to be configured
 DYNV6_TOKEN="" // the dynv6 token
 DYNV6_HOSTNAME="" // the dynv6 hostname
-DYNV6_DEVICE="" // the (optional) dynv6 device
-DYNV6_NETMASK="" // the (optional) netmask