first version for delegated zones

.env.example

@@ -0,0 +1,4 @@
+token=
+api_url=https://dynv6.com/api/v2/zones/xxx/records/yyy
+hostname=zzz
+device=ensxx

.gitignore

@@ -0,0 +1 @@
+.env

dynv6_delegated.sh

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+#!/bin/sh -e
+
+set -a
+source .env
+set +a
+
+file=$HOME/.dynv6.addr6
+[ -e $file ] && old=`cat $file`
+
+if [ -z "$hostname" -o -z "$token" ]; then
+  echo "Usage: token=<your-authentication-token> [netmask=64] $0 your-name.dynv6.net [device]"
+  exit 1
+fi
+
+if [ -z "$netmask" ]; then
+  netmask=128
+fi
+
+if [ -n "$device" ]; then
+  device="dev $device"
+fi
+address=$(ip -6 addr list scope global $device | grep -v " fd" | sed -n 's/.*inet6 \([0-9a-f:]\+\).*/\1/p' | head -n 1)
+
+if [ -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
+
+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
+curl --silent -H "Authorization: Bearer $token" -H "Accept: application/json" -H "Content-Type: application/json" -X PATCH \
+         -d '{"name":"'$hostname'","data":"'$address'","type":"AAAA"}' \
+        $api_url | jq
+
+# save current address
+echo $current > $file